diff --git a/bower.json b/bower.json index 97ae328e1..957f68110 100644 --- a/bower.json +++ b/bower.json @@ -1,6 +1,6 @@ { "name": "pdfjs-dist", - "version": "1.3.137", + "version": "1.3.142", "main": [ "build/pdf.js", "build/pdf.worker.js" diff --git a/build/pdf.combined.js b/build/pdf.combined.js index 188b015fe..ecb66d105 100644 --- a/build/pdf.combined.js +++ b/build/pdf.combined.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { typeof global !== 'undefined' ? global : this).PDFJS = {}; } -PDFJS.version = '1.3.137'; -PDFJS.build = 'b8e7efa'; +PDFJS.version = '1.3.142'; +PDFJS.build = 'e8db825'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -32,9964 +32,298 @@ PDFJS.build = 'b8e7efa'; (function (root, factory) { { - factory((root.pdfjsSharedGlobal = {})); + factory((root.pdfjsCoreArithmeticDecoder = {})); } }(this, function (exports) { - var globalScope = (typeof window !== 'undefined') ? window : - (typeof global !== 'undefined') ? global : - (typeof self !== 'undefined') ? self : this; - - var isWorker = (typeof window === 'undefined'); - - // The global PDFJS object exposes the API - // In production, it will be declared outside a global wrapper - // In development, it will be declared here - if (!globalScope.PDFJS) { - globalScope.PDFJS = {}; - } +/* This class implements the QM Coder decoding as defined in + * JPEG 2000 Part I Final Committee Draft Version 1.0 + * Annex C.3 Arithmetic decoding procedure + * available at http://www.jpeg.org/public/fcd15444-1.pdf + * + * The arithmetic decoder is used in conjunction with context models to decode + * JPEG2000 and JBIG2 streams. + */ +var ArithmeticDecoder = (function ArithmeticDecoderClosure() { + // Table C-2 + var QeTable = [ + {qe: 0x5601, nmps: 1, nlps: 1, switchFlag: 1}, + {qe: 0x3401, nmps: 2, nlps: 6, switchFlag: 0}, + {qe: 0x1801, nmps: 3, nlps: 9, switchFlag: 0}, + {qe: 0x0AC1, nmps: 4, nlps: 12, switchFlag: 0}, + {qe: 0x0521, nmps: 5, nlps: 29, switchFlag: 0}, + {qe: 0x0221, nmps: 38, nlps: 33, switchFlag: 0}, + {qe: 0x5601, nmps: 7, nlps: 6, switchFlag: 1}, + {qe: 0x5401, nmps: 8, nlps: 14, switchFlag: 0}, + {qe: 0x4801, nmps: 9, nlps: 14, switchFlag: 0}, + {qe: 0x3801, nmps: 10, nlps: 14, switchFlag: 0}, + {qe: 0x3001, nmps: 11, nlps: 17, switchFlag: 0}, + {qe: 0x2401, nmps: 12, nlps: 18, switchFlag: 0}, + {qe: 0x1C01, nmps: 13, nlps: 20, switchFlag: 0}, + {qe: 0x1601, nmps: 29, nlps: 21, switchFlag: 0}, + {qe: 0x5601, nmps: 15, nlps: 14, switchFlag: 1}, + {qe: 0x5401, nmps: 16, nlps: 14, switchFlag: 0}, + {qe: 0x5101, nmps: 17, nlps: 15, switchFlag: 0}, + {qe: 0x4801, nmps: 18, nlps: 16, switchFlag: 0}, + {qe: 0x3801, nmps: 19, nlps: 17, switchFlag: 0}, + {qe: 0x3401, nmps: 20, nlps: 18, switchFlag: 0}, + {qe: 0x3001, nmps: 21, nlps: 19, switchFlag: 0}, + {qe: 0x2801, nmps: 22, nlps: 19, switchFlag: 0}, + {qe: 0x2401, nmps: 23, nlps: 20, switchFlag: 0}, + {qe: 0x2201, nmps: 24, nlps: 21, switchFlag: 0}, + {qe: 0x1C01, nmps: 25, nlps: 22, switchFlag: 0}, + {qe: 0x1801, nmps: 26, nlps: 23, switchFlag: 0}, + {qe: 0x1601, nmps: 27, nlps: 24, switchFlag: 0}, + {qe: 0x1401, nmps: 28, nlps: 25, switchFlag: 0}, + {qe: 0x1201, nmps: 29, nlps: 26, switchFlag: 0}, + {qe: 0x1101, nmps: 30, nlps: 27, switchFlag: 0}, + {qe: 0x0AC1, nmps: 31, nlps: 28, switchFlag: 0}, + {qe: 0x09C1, nmps: 32, nlps: 29, switchFlag: 0}, + {qe: 0x08A1, nmps: 33, nlps: 30, switchFlag: 0}, + {qe: 0x0521, nmps: 34, nlps: 31, switchFlag: 0}, + {qe: 0x0441, nmps: 35, nlps: 32, switchFlag: 0}, + {qe: 0x02A1, nmps: 36, nlps: 33, switchFlag: 0}, + {qe: 0x0221, nmps: 37, nlps: 34, switchFlag: 0}, + {qe: 0x0141, nmps: 38, nlps: 35, switchFlag: 0}, + {qe: 0x0111, nmps: 39, nlps: 36, switchFlag: 0}, + {qe: 0x0085, nmps: 40, nlps: 37, switchFlag: 0}, + {qe: 0x0049, nmps: 41, nlps: 38, switchFlag: 0}, + {qe: 0x0025, nmps: 42, nlps: 39, switchFlag: 0}, + {qe: 0x0015, nmps: 43, nlps: 40, switchFlag: 0}, + {qe: 0x0009, nmps: 44, nlps: 41, switchFlag: 0}, + {qe: 0x0005, nmps: 45, nlps: 42, switchFlag: 0}, + {qe: 0x0001, nmps: 45, nlps: 43, switchFlag: 0}, + {qe: 0x5601, nmps: 46, nlps: 46, switchFlag: 0} + ]; - globalScope.PDFJS.pdfBug = false; + // C.3.5 Initialisation of the decoder (INITDEC) + function ArithmeticDecoder(data, start, end) { + this.data = data; + this.bp = start; + this.dataEnd = end; - exports.globalScope = globalScope; - exports.isWorker = isWorker; - exports.PDFJS = globalScope.PDFJS; -})); + this.chigh = data[start]; + this.clow = 0; + this.byteIn(); -(function (root, factory) { - { - factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal); + this.chigh = ((this.chigh << 7) & 0xFFFF) | ((this.clow >> 9) & 0x7F); + this.clow = (this.clow << 7) & 0xFFFF; + this.ct -= 7; + this.a = 0x8000; } -}(this, function (exports, sharedGlobal) { - -var PDFJS = sharedGlobal.PDFJS; -var globalScope = sharedGlobal.globalScope; -var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0]; + ArithmeticDecoder.prototype = { + // C.3.4 Compressed data input (BYTEIN) + byteIn: function ArithmeticDecoder_byteIn() { + var data = this.data; + var bp = this.bp; + if (data[bp] === 0xFF) { + var b1 = data[bp + 1]; + if (b1 > 0x8F) { + this.clow += 0xFF00; + this.ct = 8; + } else { + bp++; + this.clow += (data[bp] << 9); + this.ct = 7; + this.bp = bp; + } + } else { + bp++; + this.clow += bp < this.dataEnd ? (data[bp] << 8) : 0xFF00; + this.ct = 8; + this.bp = bp; + } + if (this.clow > 0xFFFF) { + this.chigh += (this.clow >> 16); + this.clow &= 0xFFFF; + } + }, + // C.3.2 Decoding a decision (DECODE) + readBit: function ArithmeticDecoder_readBit(contexts, pos) { + // contexts are packed into 1 byte: + // highest 7 bits carry cx.index, lowest bit carries cx.mps + var cx_index = contexts[pos] >> 1, cx_mps = contexts[pos] & 1; + var qeTableIcx = QeTable[cx_index]; + var qeIcx = qeTableIcx.qe; + var d; + var a = this.a - qeIcx; -var TextRenderingMode = { - FILL: 0, - STROKE: 1, - FILL_STROKE: 2, - INVISIBLE: 3, - FILL_ADD_TO_PATH: 4, - STROKE_ADD_TO_PATH: 5, - FILL_STROKE_ADD_TO_PATH: 6, - ADD_TO_PATH: 7, - FILL_STROKE_MASK: 3, - ADD_TO_PATH_FLAG: 4 -}; + if (this.chigh < qeIcx) { + // exchangeLps + if (a < qeIcx) { + a = qeIcx; + d = cx_mps; + cx_index = qeTableIcx.nmps; + } else { + a = qeIcx; + d = 1 ^ cx_mps; + if (qeTableIcx.switchFlag === 1) { + cx_mps = d; + } + cx_index = qeTableIcx.nlps; + } + } else { + this.chigh -= qeIcx; + if ((a & 0x8000) !== 0) { + this.a = a; + return cx_mps; + } + // exchangeMps + if (a < qeIcx) { + d = 1 ^ cx_mps; + if (qeTableIcx.switchFlag === 1) { + cx_mps = d; + } + cx_index = qeTableIcx.nlps; + } else { + d = cx_mps; + cx_index = qeTableIcx.nmps; + } + } + // C.3.3 renormD; + do { + if (this.ct === 0) { + this.byteIn(); + } -var ImageKind = { - GRAYSCALE_1BPP: 1, - RGB_24BPP: 2, - RGBA_32BPP: 3 -}; + a <<= 1; + this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1); + this.clow = (this.clow << 1) & 0xFFFF; + this.ct--; + } while ((a & 0x8000) === 0); + this.a = a; -var AnnotationType = { - TEXT: 1, - LINK: 2, - FREETEXT: 3, - LINE: 4, - SQUARE: 5, - CIRCLE: 6, - POLYGON: 7, - POLYLINE: 8, - HIGHLIGHT: 9, - UNDERLINE: 10, - SQUIGGLY: 11, - STRIKEOUT: 12, - STAMP: 13, - CARET: 14, - INK: 15, - POPUP: 16, - FILEATTACHMENT: 17, - SOUND: 18, - MOVIE: 19, - WIDGET: 20, - SCREEN: 21, - PRINTERMARK: 22, - TRAPNET: 23, - WATERMARK: 24, - THREED: 25, - REDACT: 26 -}; + contexts[pos] = cx_index << 1 | cx_mps; + return d; + } + }; -var AnnotationFlag = { - INVISIBLE: 0x01, - HIDDEN: 0x02, - PRINT: 0x04, - NOZOOM: 0x08, - NOROTATE: 0x10, - NOVIEW: 0x20, - READONLY: 0x40, - LOCKED: 0x80, - TOGGLENOVIEW: 0x100, - LOCKEDCONTENTS: 0x200 -}; + return ArithmeticDecoder; +})(); -var AnnotationBorderStyleType = { - SOLID: 1, - DASHED: 2, - BEVELED: 3, - INSET: 4, - UNDERLINE: 5 -}; +exports.ArithmeticDecoder = ArithmeticDecoder; +})); -var StreamType = { - UNKNOWN: 0, - FLATE: 1, - LZW: 2, - DCT: 3, - JPX: 4, - JBIG: 5, - A85: 6, - AHX: 7, - CCF: 8, - RL: 9 -}; -var FontType = { - UNKNOWN: 0, - TYPE1: 1, - TYPE1C: 2, - CIDFONTTYPE0: 3, - CIDFONTTYPE0C: 4, - TRUETYPE: 5, - CIDFONTTYPE2: 6, - TYPE3: 7, - OPENTYPE: 8, - TYPE0: 9, - MMTYPE1: 10 -}; +(function (root, factory) { + { + factory((root.pdfjsCoreCharsets = {})); + } +}(this, function (exports) { -PDFJS.VERBOSITY_LEVELS = { - errors: 0, - warnings: 1, - infos: 5 -}; +var ISOAdobeCharset = [ + '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', + 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', + 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', + 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', + 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', + 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', + 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', + 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', + 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', + 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', + 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', + 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', + 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', + 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', + 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', + 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', + 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', + 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', + 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', + 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', + 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', + 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', + 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', + 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', + 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', + 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', + 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', + 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', + 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', + 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', + 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', + 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', + 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', + 'ugrave', 'yacute', 'ydieresis', 'zcaron' +]; -// All the possible operations for an operator list. -var OPS = PDFJS.OPS = { - // Intentionally start from 1 so it is easy to spot bad operators that will be - // 0's. - dependency: 1, - setLineWidth: 2, - setLineCap: 3, - setLineJoin: 4, - setMiterLimit: 5, - setDash: 6, - setRenderingIntent: 7, - setFlatness: 8, - setGState: 9, - save: 10, - restore: 11, - transform: 12, - moveTo: 13, - lineTo: 14, - curveTo: 15, - curveTo2: 16, - curveTo3: 17, - closePath: 18, - rectangle: 19, - stroke: 20, - closeStroke: 21, - fill: 22, - eoFill: 23, - fillStroke: 24, - eoFillStroke: 25, - closeFillStroke: 26, - closeEOFillStroke: 27, - endPath: 28, - clip: 29, - eoClip: 30, - beginText: 31, - endText: 32, - setCharSpacing: 33, - setWordSpacing: 34, - setHScale: 35, - setLeading: 36, - setFont: 37, - setTextRenderingMode: 38, - setTextRise: 39, - moveText: 40, - setLeadingMoveText: 41, - setTextMatrix: 42, - nextLine: 43, - showText: 44, - showSpacedText: 45, - nextLineShowText: 46, - nextLineSetSpacingShowText: 47, - setCharWidth: 48, - setCharWidthAndBounds: 49, - setStrokeColorSpace: 50, - setFillColorSpace: 51, - setStrokeColor: 52, - setStrokeColorN: 53, - setFillColor: 54, - setFillColorN: 55, - setStrokeGray: 56, - setFillGray: 57, - setStrokeRGBColor: 58, - setFillRGBColor: 59, - setStrokeCMYKColor: 60, - setFillCMYKColor: 61, - shadingFill: 62, - beginInlineImage: 63, - beginImageData: 64, - endInlineImage: 65, - paintXObject: 66, - markPoint: 67, - markPointProps: 68, - beginMarkedContent: 69, - beginMarkedContentProps: 70, - endMarkedContent: 71, - beginCompat: 72, - endCompat: 73, - paintFormXObjectBegin: 74, - paintFormXObjectEnd: 75, - beginGroup: 76, - endGroup: 77, - beginAnnotations: 78, - endAnnotations: 79, - beginAnnotation: 80, - endAnnotation: 81, - paintJpegXObject: 82, - paintImageMaskXObject: 83, - paintImageMaskXObjectGroup: 84, - paintImageXObject: 85, - paintInlineImageXObject: 86, - paintInlineImageXObjectGroup: 87, - paintImageXObjectRepeat: 88, - paintImageMaskXObjectRepeat: 89, - paintSolidColorImageMask: 90, - constructPath: 91 -}; +var ExpertCharset = [ + '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', + 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', + 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', + 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', + 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', + 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', + 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', + 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', + 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', + 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', + 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', + 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', + 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', + 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', + 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', + 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', + 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', + 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', + 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', + 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', + 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', + 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', + 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', + 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', + 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', + 'Ydieresissmall' +]; -// A notice for devs. These are good for things that are helpful to devs, such -// as warning that Workers were disabled, which is important to devs but not -// end users. -function info(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) { - console.log('Info: ' + msg); - } -} +var ExpertSubsetCharset = [ + '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', + 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', + 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', + 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', + 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', + 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', + 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', + 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', + 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior' +]; -// Non-fatal warnings. -function warn(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) { - console.log('Warning: ' + msg); - } -} +exports.ISOAdobeCharset = ISOAdobeCharset; +exports.ExpertCharset = ExpertCharset; +exports.ExpertSubsetCharset = ExpertSubsetCharset; +})); -// Deprecated API function -- treated as warnings. -function deprecated(details) { - warn('Deprecated API usage: ' + details); -} -// Fatal errors that should trigger the fallback UI and halt execution by -// throwing an exception. -function error(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) { - console.log('Error: ' + msg); - console.log(backtrace()); +(function (root, factory) { + { + factory((root.pdfjsCoreGlyphList = {})); } - throw new Error(msg); -} - -function backtrace() { - try { - throw new Error(); - } catch (e) { - return e.stack ? e.stack.split('\n').slice(2).join('\n') : ''; - } -} - -function assert(cond, msg) { - if (!cond) { - error(msg); - } -} - -var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = { - unknown: 'unknown', - forms: 'forms', - javaScript: 'javaScript', - smask: 'smask', - shadingPattern: 'shadingPattern', - font: 'font' -}; - -// Combines two URLs. The baseUrl shall be absolute URL. If the url is an -// absolute URL, it will be returned as is. -function combineUrl(baseUrl, url) { - if (!url) { - return baseUrl; - } - if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) { - return url; - } - var i; - if (url.charAt(0) === '/') { - // absolute path - i = baseUrl.indexOf('://'); - if (url.charAt(1) === '/') { - ++i; - } else { - i = baseUrl.indexOf('/', i + 3); - } - return baseUrl.substring(0, i) + url; - } else { - // relative path - var pathLength = baseUrl.length; - i = baseUrl.lastIndexOf('#'); - pathLength = i >= 0 ? i : pathLength; - i = baseUrl.lastIndexOf('?', pathLength); - pathLength = i >= 0 ? i : pathLength; - var prefixLength = baseUrl.lastIndexOf('/', pathLength); - return baseUrl.substring(0, prefixLength + 1) + url; - } -} - -// Validates if URL is safe and allowed, e.g. to avoid XSS. -function isValidUrl(url, allowRelative) { - if (!url) { - return false; - } - // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1) - // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) - var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url); - if (!protocol) { - return allowRelative; - } - protocol = protocol[0].toLowerCase(); - switch (protocol) { - case 'http': - case 'https': - case 'ftp': - case 'mailto': - case 'tel': - return true; - default: - return false; - } -} -PDFJS.isValidUrl = isValidUrl; - -function shadow(obj, prop, value) { - Object.defineProperty(obj, prop, { value: value, - enumerable: true, - configurable: true, - writable: false }); - return value; -} -PDFJS.shadow = shadow; - -var LinkTarget = PDFJS.LinkTarget = { - NONE: 0, // Default value. - SELF: 1, - BLANK: 2, - PARENT: 3, - TOP: 4, -}; -var LinkTargetStringMap = [ - '', - '_self', - '_blank', - '_parent', - '_top' -]; - -function isExternalLinkTargetSet() { - if (PDFJS.openExternalLinksInNewWindow) { - deprecated('PDFJS.openExternalLinksInNewWindow, please use ' + - '"PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK" instead.'); - if (PDFJS.externalLinkTarget === LinkTarget.NONE) { - PDFJS.externalLinkTarget = LinkTarget.BLANK; - } - // Reset the deprecated parameter, to suppress further warnings. - PDFJS.openExternalLinksInNewWindow = false; - } - switch (PDFJS.externalLinkTarget) { - case LinkTarget.NONE: - return false; - case LinkTarget.SELF: - case LinkTarget.BLANK: - case LinkTarget.PARENT: - case LinkTarget.TOP: - return true; - } - warn('PDFJS.externalLinkTarget is invalid: ' + PDFJS.externalLinkTarget); - // Reset the external link target, to suppress further warnings. - PDFJS.externalLinkTarget = LinkTarget.NONE; - return false; -} -PDFJS.isExternalLinkTargetSet = isExternalLinkTargetSet; - -var PasswordResponses = PDFJS.PasswordResponses = { - NEED_PASSWORD: 1, - INCORRECT_PASSWORD: 2 -}; - -var PasswordException = (function PasswordExceptionClosure() { - function PasswordException(msg, code) { - this.name = 'PasswordException'; - this.message = msg; - this.code = code; - } - - PasswordException.prototype = new Error(); - PasswordException.constructor = PasswordException; - - return PasswordException; -})(); -PDFJS.PasswordException = PasswordException; - -var UnknownErrorException = (function UnknownErrorExceptionClosure() { - function UnknownErrorException(msg, details) { - this.name = 'UnknownErrorException'; - this.message = msg; - this.details = details; - } - - UnknownErrorException.prototype = new Error(); - UnknownErrorException.constructor = UnknownErrorException; - - return UnknownErrorException; -})(); -PDFJS.UnknownErrorException = UnknownErrorException; - -var InvalidPDFException = (function InvalidPDFExceptionClosure() { - function InvalidPDFException(msg) { - this.name = 'InvalidPDFException'; - this.message = msg; - } - - InvalidPDFException.prototype = new Error(); - InvalidPDFException.constructor = InvalidPDFException; - - return InvalidPDFException; -})(); -PDFJS.InvalidPDFException = InvalidPDFException; - -var MissingPDFException = (function MissingPDFExceptionClosure() { - function MissingPDFException(msg) { - this.name = 'MissingPDFException'; - this.message = msg; - } - - MissingPDFException.prototype = new Error(); - MissingPDFException.constructor = MissingPDFException; - - return MissingPDFException; -})(); -PDFJS.MissingPDFException = MissingPDFException; - -var UnexpectedResponseException = - (function UnexpectedResponseExceptionClosure() { - function UnexpectedResponseException(msg, status) { - this.name = 'UnexpectedResponseException'; - this.message = msg; - this.status = status; - } - - UnexpectedResponseException.prototype = new Error(); - UnexpectedResponseException.constructor = UnexpectedResponseException; - - return UnexpectedResponseException; -})(); -PDFJS.UnexpectedResponseException = UnexpectedResponseException; - -var NotImplementedException = (function NotImplementedExceptionClosure() { - function NotImplementedException(msg) { - this.message = msg; - } - - NotImplementedException.prototype = new Error(); - NotImplementedException.prototype.name = 'NotImplementedException'; - NotImplementedException.constructor = NotImplementedException; - - return NotImplementedException; -})(); - -var MissingDataException = (function MissingDataExceptionClosure() { - function MissingDataException(begin, end) { - this.begin = begin; - this.end = end; - this.message = 'Missing data [' + begin + ', ' + end + ')'; - } - - MissingDataException.prototype = new Error(); - MissingDataException.prototype.name = 'MissingDataException'; - MissingDataException.constructor = MissingDataException; - - return MissingDataException; -})(); - -var XRefParseException = (function XRefParseExceptionClosure() { - function XRefParseException(msg) { - this.message = msg; - } - - XRefParseException.prototype = new Error(); - XRefParseException.prototype.name = 'XRefParseException'; - XRefParseException.constructor = XRefParseException; - - return XRefParseException; -})(); - - -function bytesToString(bytes) { - assert(bytes !== null && typeof bytes === 'object' && - bytes.length !== undefined, 'Invalid argument for bytesToString'); - var length = bytes.length; - var MAX_ARGUMENT_COUNT = 8192; - if (length < MAX_ARGUMENT_COUNT) { - return String.fromCharCode.apply(null, bytes); - } - var strBuf = []; - for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) { - var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length); - var chunk = bytes.subarray(i, chunkEnd); - strBuf.push(String.fromCharCode.apply(null, chunk)); - } - return strBuf.join(''); -} - -function stringToBytes(str) { - assert(typeof str === 'string', 'Invalid argument for stringToBytes'); - var length = str.length; - var bytes = new Uint8Array(length); - for (var i = 0; i < length; ++i) { - bytes[i] = str.charCodeAt(i) & 0xFF; - } - return bytes; -} - -function string32(value) { - return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff, - (value >> 8) & 0xff, value & 0xff); -} - -function log2(x) { - var n = 1, i = 0; - while (x > n) { - n <<= 1; - i++; - } - return i; -} - -function readInt8(data, start) { - return (data[start] << 24) >> 24; -} - -function readUint16(data, offset) { - return (data[offset] << 8) | data[offset + 1]; -} - -function readUint32(data, offset) { - return ((data[offset] << 24) | (data[offset + 1] << 16) | - (data[offset + 2] << 8) | data[offset + 3]) >>> 0; -} - -// Lazy test the endianness of the platform -// NOTE: This will be 'true' for simulated TypedArrays -function isLittleEndian() { - var buffer8 = new Uint8Array(2); - buffer8[0] = 1; - var buffer16 = new Uint16Array(buffer8.buffer); - return (buffer16[0] === 1); -} - -Object.defineProperty(PDFJS, 'isLittleEndian', { - configurable: true, - get: function PDFJS_isLittleEndian() { - return shadow(PDFJS, 'isLittleEndian', isLittleEndian()); - } -}); - - // Lazy test if the userAgent support CanvasTypedArrays -function hasCanvasTypedArrays() { - var canvas = document.createElement('canvas'); - canvas.width = canvas.height = 1; - var ctx = canvas.getContext('2d'); - var imageData = ctx.createImageData(1, 1); - return (typeof imageData.data.buffer !== 'undefined'); -} - -Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', { - configurable: true, - get: function PDFJS_hasCanvasTypedArrays() { - return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays()); - } -}); - -var Uint32ArrayView = (function Uint32ArrayViewClosure() { - - function Uint32ArrayView(buffer, length) { - this.buffer = buffer; - this.byteLength = buffer.length; - this.length = length === undefined ? (this.byteLength >> 2) : length; - ensureUint32ArrayViewProps(this.length); - } - Uint32ArrayView.prototype = Object.create(null); - - var uint32ArrayViewSetters = 0; - function createUint32ArrayProp(index) { - return { - get: function () { - var buffer = this.buffer, offset = index << 2; - return (buffer[offset] | (buffer[offset + 1] << 8) | - (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0; - }, - set: function (value) { - var buffer = this.buffer, offset = index << 2; - buffer[offset] = value & 255; - buffer[offset + 1] = (value >> 8) & 255; - buffer[offset + 2] = (value >> 16) & 255; - buffer[offset + 3] = (value >>> 24) & 255; - } - }; - } - - function ensureUint32ArrayViewProps(length) { - while (uint32ArrayViewSetters < length) { - Object.defineProperty(Uint32ArrayView.prototype, - uint32ArrayViewSetters, - createUint32ArrayProp(uint32ArrayViewSetters)); - uint32ArrayViewSetters++; - } - } - - return Uint32ArrayView; -})(); - -exports.Uint32ArrayView = Uint32ArrayView; - -var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0]; - -var Util = PDFJS.Util = (function UtilClosure() { - function Util() {} - - var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')']; - - // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids - // creating many intermediate strings. - Util.makeCssRgb = function Util_makeCssRgb(r, g, b) { - rgbBuf[1] = r; - rgbBuf[3] = g; - rgbBuf[5] = b; - return rgbBuf.join(''); - }; - - // Concatenates two transformation matrices together and returns the result. - Util.transform = function Util_transform(m1, m2) { - return [ - m1[0] * m2[0] + m1[2] * m2[1], - m1[1] * m2[0] + m1[3] * m2[1], - m1[0] * m2[2] + m1[2] * m2[3], - m1[1] * m2[2] + m1[3] * m2[3], - m1[0] * m2[4] + m1[2] * m2[5] + m1[4], - m1[1] * m2[4] + m1[3] * m2[5] + m1[5] - ]; - }; - - // For 2d affine transforms - Util.applyTransform = function Util_applyTransform(p, m) { - var xt = p[0] * m[0] + p[1] * m[2] + m[4]; - var yt = p[0] * m[1] + p[1] * m[3] + m[5]; - return [xt, yt]; - }; - - Util.applyInverseTransform = function Util_applyInverseTransform(p, m) { - var d = m[0] * m[3] - m[1] * m[2]; - var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d; - var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d; - return [xt, yt]; - }; - - // Applies the transform to the rectangle and finds the minimum axially - // aligned bounding box. - Util.getAxialAlignedBoundingBox = - function Util_getAxialAlignedBoundingBox(r, m) { - - var p1 = Util.applyTransform(r, m); - var p2 = Util.applyTransform(r.slice(2, 4), m); - var p3 = Util.applyTransform([r[0], r[3]], m); - var p4 = Util.applyTransform([r[2], r[1]], m); - return [ - Math.min(p1[0], p2[0], p3[0], p4[0]), - Math.min(p1[1], p2[1], p3[1], p4[1]), - Math.max(p1[0], p2[0], p3[0], p4[0]), - Math.max(p1[1], p2[1], p3[1], p4[1]) - ]; - }; - - Util.inverseTransform = function Util_inverseTransform(m) { - var d = m[0] * m[3] - m[1] * m[2]; - return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, - (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d]; - }; - - // Apply a generic 3d matrix M on a 3-vector v: - // | a b c | | X | - // | d e f | x | Y | - // | g h i | | Z | - // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i], - // with v as [X,Y,Z] - Util.apply3dTransform = function Util_apply3dTransform(m, v) { - return [ - m[0] * v[0] + m[1] * v[1] + m[2] * v[2], - m[3] * v[0] + m[4] * v[1] + m[5] * v[2], - m[6] * v[0] + m[7] * v[1] + m[8] * v[2] - ]; - }; - - // This calculation uses Singular Value Decomposition. - // The SVD can be represented with formula A = USV. We are interested in the - // matrix S here because it represents the scale values. - Util.singularValueDecompose2dScale = - function Util_singularValueDecompose2dScale(m) { - - var transpose = [m[0], m[2], m[1], m[3]]; - - // Multiply matrix m with its transpose. - var a = m[0] * transpose[0] + m[1] * transpose[2]; - var b = m[0] * transpose[1] + m[1] * transpose[3]; - var c = m[2] * transpose[0] + m[3] * transpose[2]; - var d = m[2] * transpose[1] + m[3] * transpose[3]; - - // Solve the second degree polynomial to get roots. - var first = (a + d) / 2; - var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2; - var sx = first + second || 1; - var sy = first - second || 1; - - // Scale values are the square roots of the eigenvalues. - return [Math.sqrt(sx), Math.sqrt(sy)]; - }; - - // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2) - // For coordinate systems whose origin lies in the bottom-left, this - // means normalization to (BL,TR) ordering. For systems with origin in the - // top-left, this means (TL,BR) ordering. - Util.normalizeRect = function Util_normalizeRect(rect) { - var r = rect.slice(0); // clone rect - if (rect[0] > rect[2]) { - r[0] = rect[2]; - r[2] = rect[0]; - } - if (rect[1] > rect[3]) { - r[1] = rect[3]; - r[3] = rect[1]; - } - return r; - }; - - // Returns a rectangle [x1, y1, x2, y2] corresponding to the - // intersection of rect1 and rect2. If no intersection, returns 'false' - // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2] - Util.intersect = function Util_intersect(rect1, rect2) { - function compare(a, b) { - return a - b; - } - - // Order points along the axes - var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare), - orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare), - result = []; - - rect1 = Util.normalizeRect(rect1); - rect2 = Util.normalizeRect(rect2); - - // X: first and second points belong to different rectangles? - if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) || - (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) { - // Intersection must be between second and third points - result[0] = orderedX[1]; - result[2] = orderedX[2]; - } else { - return false; - } - - // Y: first and second points belong to different rectangles? - if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) || - (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) { - // Intersection must be between second and third points - result[1] = orderedY[1]; - result[3] = orderedY[2]; - } else { - return false; - } - - return result; - }; - - Util.sign = function Util_sign(num) { - return num < 0 ? -1 : 1; - }; - - Util.appendToArray = function Util_appendToArray(arr1, arr2) { - Array.prototype.push.apply(arr1, arr2); - }; - - Util.prependToArray = function Util_prependToArray(arr1, arr2) { - Array.prototype.unshift.apply(arr1, arr2); - }; - - Util.extendObj = function extendObj(obj1, obj2) { - for (var key in obj2) { - obj1[key] = obj2[key]; - } - }; - - Util.getInheritableProperty = function Util_getInheritableProperty(dict, - name) { - while (dict && !dict.has(name)) { - dict = dict.get('Parent'); - } - if (!dict) { - return null; - } - return dict.get(name); - }; - - Util.inherit = function Util_inherit(sub, base, prototype) { - sub.prototype = Object.create(base.prototype); - sub.prototype.constructor = sub; - for (var prop in prototype) { - sub.prototype[prop] = prototype[prop]; - } - }; - - Util.loadScript = function Util_loadScript(src, callback) { - var script = document.createElement('script'); - var loaded = false; - script.setAttribute('src', src); - if (callback) { - script.onload = function() { - if (!loaded) { - callback(); - } - loaded = true; - }; - } - document.getElementsByTagName('head')[0].appendChild(script); - }; - - return Util; -})(); - -/** - * PDF page viewport created based on scale, rotation and offset. - * @class - * @alias PDFJS.PageViewport - */ -var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() { - /** - * @constructor - * @private - * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates. - * @param scale {number} scale of the viewport. - * @param rotation {number} rotations of the viewport in degrees. - * @param offsetX {number} offset X - * @param offsetY {number} offset Y - * @param dontFlip {boolean} if true, axis Y will not be flipped. - */ - function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) { - this.viewBox = viewBox; - this.scale = scale; - this.rotation = rotation; - this.offsetX = offsetX; - this.offsetY = offsetY; - - // creating transform to convert pdf coordinate system to the normal - // canvas like coordinates taking in account scale and rotation - var centerX = (viewBox[2] + viewBox[0]) / 2; - var centerY = (viewBox[3] + viewBox[1]) / 2; - var rotateA, rotateB, rotateC, rotateD; - rotation = rotation % 360; - rotation = rotation < 0 ? rotation + 360 : rotation; - switch (rotation) { - case 180: - rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1; - break; - case 90: - rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0; - break; - case 270: - rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0; - break; - //case 0: - default: - rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1; - break; - } - - if (dontFlip) { - rotateC = -rotateC; rotateD = -rotateD; - } - - var offsetCanvasX, offsetCanvasY; - var width, height; - if (rotateA === 0) { - offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX; - offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY; - width = Math.abs(viewBox[3] - viewBox[1]) * scale; - height = Math.abs(viewBox[2] - viewBox[0]) * scale; - } else { - offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX; - offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY; - width = Math.abs(viewBox[2] - viewBox[0]) * scale; - height = Math.abs(viewBox[3] - viewBox[1]) * scale; - } - // creating transform for the following operations: - // translate(-centerX, -centerY), rotate and flip vertically, - // scale, and translate(offsetCanvasX, offsetCanvasY) - this.transform = [ - rotateA * scale, - rotateB * scale, - rotateC * scale, - rotateD * scale, - offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, - offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY - ]; - - this.width = width; - this.height = height; - this.fontScale = scale; - } - PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ { - /** - * Clones viewport with additional properties. - * @param args {Object} (optional) If specified, may contain the 'scale' or - * 'rotation' properties to override the corresponding properties in - * the cloned viewport. - * @returns {PDFJS.PageViewport} Cloned viewport. - */ - clone: function PageViewPort_clone(args) { - args = args || {}; - var scale = 'scale' in args ? args.scale : this.scale; - var rotation = 'rotation' in args ? args.rotation : this.rotation; - return new PageViewport(this.viewBox.slice(), scale, rotation, - this.offsetX, this.offsetY, args.dontFlip); - }, - /** - * Converts PDF point to the viewport coordinates. For examples, useful for - * converting PDF location into canvas pixel coordinates. - * @param x {number} X coordinate. - * @param y {number} Y coordinate. - * @returns {Object} Object that contains 'x' and 'y' properties of the - * point in the viewport coordinate space. - * @see {@link convertToPdfPoint} - * @see {@link convertToViewportRectangle} - */ - convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) { - return Util.applyTransform([x, y], this.transform); - }, - /** - * Converts PDF rectangle to the viewport coordinates. - * @param rect {Array} xMin, yMin, xMax and yMax coordinates. - * @returns {Array} Contains corresponding coordinates of the rectangle - * in the viewport coordinate space. - * @see {@link convertToViewportPoint} - */ - convertToViewportRectangle: - function PageViewport_convertToViewportRectangle(rect) { - var tl = Util.applyTransform([rect[0], rect[1]], this.transform); - var br = Util.applyTransform([rect[2], rect[3]], this.transform); - return [tl[0], tl[1], br[0], br[1]]; - }, - /** - * Converts viewport coordinates to the PDF location. For examples, useful - * for converting canvas pixel location into PDF one. - * @param x {number} X coordinate. - * @param y {number} Y coordinate. - * @returns {Object} Object that contains 'x' and 'y' properties of the - * point in the PDF coordinate space. - * @see {@link convertToViewportPoint} - */ - convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) { - return Util.applyInverseTransform([x, y], this.transform); - } - }; - return PageViewport; -})(); - -var PDFStringTranslateTable = [ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, - 0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C, - 0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160, - 0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC -]; - -function stringToPDFString(str) { - var i, n = str.length, strBuf = []; - if (str[0] === '\xFE' && str[1] === '\xFF') { - // UTF16BE BOM - for (i = 2; i < n; i += 2) { - strBuf.push(String.fromCharCode( - (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))); - } - } else { - for (i = 0; i < n; ++i) { - var code = PDFStringTranslateTable[str.charCodeAt(i)]; - strBuf.push(code ? String.fromCharCode(code) : str.charAt(i)); - } - } - return strBuf.join(''); -} - -function stringToUTF8String(str) { - return decodeURIComponent(escape(str)); -} - -function utf8StringToString(str) { - return unescape(encodeURIComponent(str)); -} - -function isEmptyObj(obj) { - for (var key in obj) { - return false; - } - return true; -} - -function isBool(v) { - return typeof v === 'boolean'; -} - -function isInt(v) { - return typeof v === 'number' && ((v | 0) === v); -} - -function isNum(v) { - return typeof v === 'number'; -} - -function isString(v) { - return typeof v === 'string'; -} - -function isArray(v) { - return v instanceof Array; -} - -function isArrayBuffer(v) { - return typeof v === 'object' && v !== null && v.byteLength !== undefined; -} - -/** - * Promise Capability object. - * - * @typedef {Object} PromiseCapability - * @property {Promise} promise - A promise object. - * @property {function} resolve - Fullfills the promise. - * @property {function} reject - Rejects the promise. - */ - -/** - * Creates a promise capability object. - * @alias PDFJS.createPromiseCapability - * - * @return {PromiseCapability} A capability object contains: - * - a Promise, resolve and reject methods. - */ -function createPromiseCapability() { - var capability = {}; - capability.promise = new Promise(function (resolve, reject) { - capability.resolve = resolve; - capability.reject = reject; - }); - return capability; -} - -PDFJS.createPromiseCapability = createPromiseCapability; - -/** - * Polyfill for Promises: - * The following promise implementation tries to generally implement the - * Promise/A+ spec. Some notable differences from other promise libaries are: - * - There currently isn't a seperate deferred and promise object. - * - Unhandled rejections eventually show an error if they aren't handled. - * - * Based off of the work in: - * https://bugzilla.mozilla.org/show_bug.cgi?id=810490 - */ -(function PromiseClosure() { - if (globalScope.Promise) { - // Promises existing in the DOM/Worker, checking presence of all/resolve - if (typeof globalScope.Promise.all !== 'function') { - globalScope.Promise.all = function (iterable) { - var count = 0, results = [], resolve, reject; - var promise = new globalScope.Promise(function (resolve_, reject_) { - resolve = resolve_; - reject = reject_; - }); - iterable.forEach(function (p, i) { - count++; - p.then(function (result) { - results[i] = result; - count--; - if (count === 0) { - resolve(results); - } - }, reject); - }); - if (count === 0) { - resolve(results); - } - return promise; - }; - } - if (typeof globalScope.Promise.resolve !== 'function') { - globalScope.Promise.resolve = function (value) { - return new globalScope.Promise(function (resolve) { resolve(value); }); - }; - } - if (typeof globalScope.Promise.reject !== 'function') { - globalScope.Promise.reject = function (reason) { - return new globalScope.Promise(function (resolve, reject) { - reject(reason); - }); - }; - } - if (typeof globalScope.Promise.prototype.catch !== 'function') { - globalScope.Promise.prototype.catch = function (onReject) { - return globalScope.Promise.prototype.then(undefined, onReject); - }; - } - return; - } - var STATUS_PENDING = 0; - var STATUS_RESOLVED = 1; - var STATUS_REJECTED = 2; - - // In an attempt to avoid silent exceptions, unhandled rejections are - // tracked and if they aren't handled in a certain amount of time an - // error is logged. - var REJECTION_TIMEOUT = 500; - - var HandlerManager = { - handlers: [], - running: false, - unhandledRejections: [], - pendingRejectionCheck: false, - - scheduleHandlers: function scheduleHandlers(promise) { - if (promise._status === STATUS_PENDING) { - return; - } - - this.handlers = this.handlers.concat(promise._handlers); - promise._handlers = []; - - if (this.running) { - return; - } - this.running = true; - - setTimeout(this.runHandlers.bind(this), 0); - }, - - runHandlers: function runHandlers() { - var RUN_TIMEOUT = 1; // ms - var timeoutAt = Date.now() + RUN_TIMEOUT; - while (this.handlers.length > 0) { - var handler = this.handlers.shift(); - - var nextStatus = handler.thisPromise._status; - var nextValue = handler.thisPromise._value; - - try { - if (nextStatus === STATUS_RESOLVED) { - if (typeof handler.onResolve === 'function') { - nextValue = handler.onResolve(nextValue); - } - } else if (typeof handler.onReject === 'function') { - nextValue = handler.onReject(nextValue); - nextStatus = STATUS_RESOLVED; - - if (handler.thisPromise._unhandledRejection) { - this.removeUnhandeledRejection(handler.thisPromise); - } - } - } catch (ex) { - nextStatus = STATUS_REJECTED; - nextValue = ex; - } - - handler.nextPromise._updateStatus(nextStatus, nextValue); - if (Date.now() >= timeoutAt) { - break; - } - } - - if (this.handlers.length > 0) { - setTimeout(this.runHandlers.bind(this), 0); - return; - } - - this.running = false; - }, - - addUnhandledRejection: function addUnhandledRejection(promise) { - this.unhandledRejections.push({ - promise: promise, - time: Date.now() - }); - this.scheduleRejectionCheck(); - }, - - removeUnhandeledRejection: function removeUnhandeledRejection(promise) { - promise._unhandledRejection = false; - for (var i = 0; i < this.unhandledRejections.length; i++) { - if (this.unhandledRejections[i].promise === promise) { - this.unhandledRejections.splice(i); - i--; - } - } - }, - - scheduleRejectionCheck: function scheduleRejectionCheck() { - if (this.pendingRejectionCheck) { - return; - } - this.pendingRejectionCheck = true; - setTimeout(function rejectionCheck() { - this.pendingRejectionCheck = false; - var now = Date.now(); - for (var i = 0; i < this.unhandledRejections.length; i++) { - if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) { - var unhandled = this.unhandledRejections[i].promise._value; - var msg = 'Unhandled rejection: ' + unhandled; - if (unhandled.stack) { - msg += '\n' + unhandled.stack; - } - warn(msg); - this.unhandledRejections.splice(i); - i--; - } - } - if (this.unhandledRejections.length) { - this.scheduleRejectionCheck(); - } - }.bind(this), REJECTION_TIMEOUT); - } - }; - - function Promise(resolver) { - this._status = STATUS_PENDING; - this._handlers = []; - try { - resolver.call(this, this._resolve.bind(this), this._reject.bind(this)); - } catch (e) { - this._reject(e); - } - } - /** - * Builds a promise that is resolved when all the passed in promises are - * resolved. - * @param {array} array of data and/or promises to wait for. - * @return {Promise} New dependant promise. - */ - Promise.all = function Promise_all(promises) { - var resolveAll, rejectAll; - var deferred = new Promise(function (resolve, reject) { - resolveAll = resolve; - rejectAll = reject; - }); - var unresolved = promises.length; - var results = []; - if (unresolved === 0) { - resolveAll(results); - return deferred; - } - function reject(reason) { - if (deferred._status === STATUS_REJECTED) { - return; - } - results = []; - rejectAll(reason); - } - for (var i = 0, ii = promises.length; i < ii; ++i) { - var promise = promises[i]; - var resolve = (function(i) { - return function(value) { - if (deferred._status === STATUS_REJECTED) { - return; - } - results[i] = value; - unresolved--; - if (unresolved === 0) { - resolveAll(results); - } - }; - })(i); - if (Promise.isPromise(promise)) { - promise.then(resolve, reject); - } else { - resolve(promise); - } - } - return deferred; - }; - - /** - * Checks if the value is likely a promise (has a 'then' function). - * @return {boolean} true if value is thenable - */ - Promise.isPromise = function Promise_isPromise(value) { - return value && typeof value.then === 'function'; - }; - - /** - * Creates resolved promise - * @param value resolve value - * @returns {Promise} - */ - Promise.resolve = function Promise_resolve(value) { - return new Promise(function (resolve) { resolve(value); }); - }; - - /** - * Creates rejected promise - * @param reason rejection value - * @returns {Promise} - */ - Promise.reject = function Promise_reject(reason) { - return new Promise(function (resolve, reject) { reject(reason); }); - }; - - Promise.prototype = { - _status: null, - _value: null, - _handlers: null, - _unhandledRejection: null, - - _updateStatus: function Promise__updateStatus(status, value) { - if (this._status === STATUS_RESOLVED || - this._status === STATUS_REJECTED) { - return; - } - - if (status === STATUS_RESOLVED && - Promise.isPromise(value)) { - value.then(this._updateStatus.bind(this, STATUS_RESOLVED), - this._updateStatus.bind(this, STATUS_REJECTED)); - return; - } - - this._status = status; - this._value = value; - - if (status === STATUS_REJECTED && this._handlers.length === 0) { - this._unhandledRejection = true; - HandlerManager.addUnhandledRejection(this); - } - - HandlerManager.scheduleHandlers(this); - }, - - _resolve: function Promise_resolve(value) { - this._updateStatus(STATUS_RESOLVED, value); - }, - - _reject: function Promise_reject(reason) { - this._updateStatus(STATUS_REJECTED, reason); - }, - - then: function Promise_then(onResolve, onReject) { - var nextPromise = new Promise(function (resolve, reject) { - this.resolve = resolve; - this.reject = reject; - }); - this._handlers.push({ - thisPromise: this, - onResolve: onResolve, - onReject: onReject, - nextPromise: nextPromise - }); - HandlerManager.scheduleHandlers(this); - return nextPromise; - }, - - catch: function Promise_catch(onReject) { - return this.then(undefined, onReject); - } - }; - - globalScope.Promise = Promise; -})(); - -var StatTimer = (function StatTimerClosure() { - function rpad(str, pad, length) { - while (str.length < length) { - str += pad; - } - return str; - } - function StatTimer() { - this.started = {}; - this.times = []; - this.enabled = true; - } - StatTimer.prototype = { - time: function StatTimer_time(name) { - if (!this.enabled) { - return; - } - if (name in this.started) { - warn('Timer is already running for ' + name); - } - this.started[name] = Date.now(); - }, - timeEnd: function StatTimer_timeEnd(name) { - if (!this.enabled) { - return; - } - if (!(name in this.started)) { - warn('Timer has not been started for ' + name); - } - this.times.push({ - 'name': name, - 'start': this.started[name], - 'end': Date.now() - }); - // Remove timer from started so it can be called again. - delete this.started[name]; - }, - toString: function StatTimer_toString() { - var i, ii; - var times = this.times; - var out = ''; - // Find the longest name for padding purposes. - var longest = 0; - for (i = 0, ii = times.length; i < ii; ++i) { - var name = times[i]['name']; - if (name.length > longest) { - longest = name.length; - } - } - for (i = 0, ii = times.length; i < ii; ++i) { - var span = times[i]; - var duration = span.end - span.start; - out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n'; - } - return out; - } - }; - return StatTimer; -})(); - -PDFJS.createBlob = function createBlob(data, contentType) { - if (typeof Blob !== 'undefined') { - return new Blob([data], { type: contentType }); - } - // Blob builder is deprecated in FF14 and removed in FF18. - var bb = new MozBlobBuilder(); - bb.append(data); - return bb.getBlob(contentType); -}; - -PDFJS.createObjectURL = (function createObjectURLClosure() { - // Blob/createObjectURL is not available, falling back to data schema. - var digits = - 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; - - return function createObjectURL(data, contentType) { - if (!PDFJS.disableCreateObjectURL && - typeof URL !== 'undefined' && URL.createObjectURL) { - var blob = PDFJS.createBlob(data, contentType); - return URL.createObjectURL(blob); - } - - var buffer = 'data:' + contentType + ';base64,'; - for (var i = 0, ii = data.length; i < ii; i += 3) { - var b1 = data[i] & 0xFF; - var b2 = data[i + 1] & 0xFF; - var b3 = data[i + 2] & 0xFF; - var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4); - var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64; - var d4 = i + 2 < ii ? (b3 & 0x3F) : 64; - buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4]; - } - return buffer; - }; -})(); - -function MessageHandler(sourceName, targetName, comObj) { - this.sourceName = sourceName; - this.targetName = targetName; - this.comObj = comObj; - this.callbackIndex = 1; - this.postMessageTransfers = true; - var callbacksCapabilities = this.callbacksCapabilities = {}; - var ah = this.actionHandler = {}; - - this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) { - var data = event.data; - if (data.targetName !== this.sourceName) { - return; - } - if (data.isReply) { - var callbackId = data.callbackId; - if (data.callbackId in callbacksCapabilities) { - var callback = callbacksCapabilities[callbackId]; - delete callbacksCapabilities[callbackId]; - if ('error' in data) { - callback.reject(data.error); - } else { - callback.resolve(data.data); - } - } else { - error('Cannot resolve callback ' + callbackId); - } - } else if (data.action in ah) { - var action = ah[data.action]; - if (data.callbackId) { - var sourceName = this.sourceName; - var targetName = data.sourceName; - Promise.resolve().then(function () { - return action[0].call(action[1], data.data); - }).then(function (result) { - comObj.postMessage({ - sourceName: sourceName, - targetName: targetName, - isReply: true, - callbackId: data.callbackId, - data: result - }); - }, function (reason) { - if (reason instanceof Error) { - // Serialize error to avoid "DataCloneError" - reason = reason + ''; - } - comObj.postMessage({ - sourceName: sourceName, - targetName: targetName, - isReply: true, - callbackId: data.callbackId, - error: reason - }); - }); - } else { - action[0].call(action[1], data.data); - } - } else { - error('Unknown action from worker: ' + data.action); - } - }.bind(this); - comObj.addEventListener('message', this._onComObjOnMessage); -} - -MessageHandler.prototype = { - on: function messageHandlerOn(actionName, handler, scope) { - var ah = this.actionHandler; - if (ah[actionName]) { - error('There is already an actionName called "' + actionName + '"'); - } - ah[actionName] = [handler, scope]; - }, - /** - * Sends a message to the comObj to invoke the action with the supplied data. - * @param {String} actionName Action to call. - * @param {JSON} data JSON data to send. - * @param {Array} [transfers] Optional list of transfers/ArrayBuffers - */ - send: function messageHandlerSend(actionName, data, transfers) { - var message = { - sourceName: this.sourceName, - targetName: this.targetName, - action: actionName, - data: data - }; - this.postMessage(message, transfers); - }, - /** - * Sends a message to the comObj to invoke the action with the supplied data. - * Expects that other side will callback with the response. - * @param {String} actionName Action to call. - * @param {JSON} data JSON data to send. - * @param {Array} [transfers] Optional list of transfers/ArrayBuffers. - * @returns {Promise} Promise to be resolved with response data. - */ - sendWithPromise: - function messageHandlerSendWithPromise(actionName, data, transfers) { - var callbackId = this.callbackIndex++; - var message = { - sourceName: this.sourceName, - targetName: this.targetName, - action: actionName, - data: data, - callbackId: callbackId - }; - var capability = createPromiseCapability(); - this.callbacksCapabilities[callbackId] = capability; - try { - this.postMessage(message, transfers); - } catch (e) { - capability.reject(e); - } - return capability.promise; - }, - /** - * Sends raw message to the comObj. - * @private - * @param message {Object} Raw message. - * @param transfers List of transfers/ArrayBuffers, or undefined. - */ - postMessage: function (message, transfers) { - if (transfers && this.postMessageTransfers) { - this.comObj.postMessage(message, transfers); - } else { - this.comObj.postMessage(message); - } - }, - - destroy: function () { - this.comObj.removeEventListener('message', this._onComObjOnMessage); - } -}; - -function loadJpegStream(id, imageUrl, objs) { - var img = new Image(); - img.onload = (function loadJpegStream_onloadClosure() { - objs.resolve(id, img); - }); - img.onerror = (function loadJpegStream_onerrorClosure() { - objs.resolve(id, null); - warn('Error during JPEG image loading'); - }); - img.src = imageUrl; -} - -exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX; -exports.IDENTITY_MATRIX = IDENTITY_MATRIX; -exports.OPS = OPS; -exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES; -exports.AnnotationBorderStyleType = AnnotationBorderStyleType; -exports.AnnotationFlag = AnnotationFlag; -exports.AnnotationType = AnnotationType; -exports.FontType = FontType; -exports.ImageKind = ImageKind; -exports.InvalidPDFException = InvalidPDFException; -exports.LinkTarget = LinkTarget; -exports.LinkTargetStringMap = LinkTargetStringMap; -exports.MessageHandler = MessageHandler; -exports.MissingDataException = MissingDataException; -exports.MissingPDFException = MissingPDFException; -exports.NotImplementedException = NotImplementedException; -exports.PasswordException = PasswordException; -exports.PasswordResponses = PasswordResponses; -exports.StatTimer = StatTimer; -exports.StreamType = StreamType; -exports.TextRenderingMode = TextRenderingMode; -exports.UnexpectedResponseException = UnexpectedResponseException; -exports.UnknownErrorException = UnknownErrorException; -exports.Util = Util; -exports.XRefParseException = XRefParseException; -exports.assert = assert; -exports.bytesToString = bytesToString; -exports.combineUrl = combineUrl; -exports.createPromiseCapability = createPromiseCapability; -exports.deprecated = deprecated; -exports.error = error; -exports.info = info; -exports.isArray = isArray; -exports.isArrayBuffer = isArrayBuffer; -exports.isBool = isBool; -exports.isEmptyObj = isEmptyObj; -exports.isExternalLinkTargetSet = isExternalLinkTargetSet; -exports.isInt = isInt; -exports.isNum = isNum; -exports.isString = isString; -exports.isValidUrl = isValidUrl; -exports.loadJpegStream = loadJpegStream; -exports.log2 = log2; -exports.readInt8 = readInt8; -exports.readUint16 = readUint16; -exports.readUint32 = readUint32; -exports.shadow = shadow; -exports.string32 = string32; -exports.stringToBytes = stringToBytes; -exports.stringToPDFString = stringToPDFString; -exports.stringToUTF8String = stringToUTF8String; -exports.utf8StringToString = utf8StringToString; -exports.warn = warn; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayDOMUtils = {}), root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedGlobal) { - -var PDFJS = sharedGlobal.PDFJS; - -/** - * Optimised CSS custom property getter/setter. - * @class - */ -var CustomStyle = (function CustomStyleClosure() { - - // As noted on: http://www.zachstronaut.com/posts/2009/02/17/ - // animate-css-transforms-firefox-webkit.html - // in some versions of IE9 it is critical that ms appear in this list - // before Moz - var prefixes = ['ms', 'Moz', 'Webkit', 'O']; - var _cache = {}; - - function CustomStyle() {} - - CustomStyle.getProp = function get(propName, element) { - // check cache only when no element is given - if (arguments.length === 1 && typeof _cache[propName] === 'string') { - return _cache[propName]; - } - - element = element || document.documentElement; - var style = element.style, prefixed, uPropName; - - // test standard property first - if (typeof style[propName] === 'string') { - return (_cache[propName] = propName); - } - - // capitalize - uPropName = propName.charAt(0).toUpperCase() + propName.slice(1); - - // test vendor specific properties - for (var i = 0, l = prefixes.length; i < l; i++) { - prefixed = prefixes[i] + uPropName; - if (typeof style[prefixed] === 'string') { - return (_cache[propName] = prefixed); - } - } - - //if all fails then set to undefined - return (_cache[propName] = 'undefined'); - }; - - CustomStyle.setProp = function set(propName, element, str) { - var prop = this.getProp(propName); - if (prop !== 'undefined') { - element.style[prop] = str; - } - }; - - return CustomStyle; -})(); - -PDFJS.CustomStyle = CustomStyle; - -exports.CustomStyle = CustomStyle; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayAnnotationLayer = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayDOMUtils); - } -}(this, function (exports, sharedUtil, displayDOMUtils) { - -var AnnotationBorderStyleType = sharedUtil.AnnotationBorderStyleType; -var AnnotationType = sharedUtil.AnnotationType; -var Util = sharedUtil.Util; -var isExternalLinkTargetSet = sharedUtil.isExternalLinkTargetSet; -var LinkTargetStringMap = sharedUtil.LinkTargetStringMap; -var warn = sharedUtil.warn; -var CustomStyle = displayDOMUtils.CustomStyle; - -/** - * @typedef {Object} AnnotationElementParameters - * @property {Object} data - * @property {HTMLDivElement} layer - * @property {PDFPage} page - * @property {PageViewport} viewport - * @property {IPDFLinkService} linkService - */ - -/** - * @class - * @alias AnnotationElementFactory - */ -function AnnotationElementFactory() {} -AnnotationElementFactory.prototype = - /** @lends AnnotationElementFactory.prototype */ { - /** - * @param {AnnotationElementParameters} parameters - * @returns {AnnotationElement} - */ - create: function AnnotationElementFactory_create(parameters) { - var subtype = parameters.data.annotationType; - - switch (subtype) { - case AnnotationType.LINK: - return new LinkAnnotationElement(parameters); - - case AnnotationType.TEXT: - return new TextAnnotationElement(parameters); - - case AnnotationType.WIDGET: - return new WidgetAnnotationElement(parameters); - - case AnnotationType.POPUP: - return new PopupAnnotationElement(parameters); - - case AnnotationType.UNDERLINE: - return new UnderlineAnnotationElement(parameters); - - default: - throw new Error('Unimplemented annotation type "' + subtype + '"'); - } - } -}; - -/** - * @class - * @alias AnnotationElement - */ -var AnnotationElement = (function AnnotationElementClosure() { - function AnnotationElement(parameters) { - this.data = parameters.data; - this.layer = parameters.layer; - this.page = parameters.page; - this.viewport = parameters.viewport; - this.linkService = parameters.linkService; - - this.container = this._createContainer(); - } - - AnnotationElement.prototype = /** @lends AnnotationElement.prototype */ { - /** - * Create an empty container for the annotation's HTML element. - * - * @private - * @memberof AnnotationElement - * @returns {HTMLSectionElement} - */ - _createContainer: function AnnotationElement_createContainer() { - var data = this.data, page = this.page, viewport = this.viewport; - var container = document.createElement('section'); - var width = data.rect[2] - data.rect[0]; - var height = data.rect[3] - data.rect[1]; - - container.setAttribute('data-annotation-id', data.id); - - // Do *not* modify `data.rect`, since that will corrupt the annotation - // position on subsequent calls to `_createContainer` (see issue 6804). - var rect = Util.normalizeRect([ - data.rect[0], - page.view[3] - data.rect[1] + page.view[1], - data.rect[2], - page.view[3] - data.rect[3] + page.view[1] - ]); - - CustomStyle.setProp('transform', container, - 'matrix(' + viewport.transform.join(',') + ')'); - CustomStyle.setProp('transformOrigin', container, - -rect[0] + 'px ' + -rect[1] + 'px'); - - if (data.borderStyle.width > 0) { - container.style.borderWidth = data.borderStyle.width + 'px'; - if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) { - // Underline styles only have a bottom border, so we do not need - // to adjust for all borders. This yields a similar result as - // Adobe Acrobat/Reader. - width = width - 2 * data.borderStyle.width; - height = height - 2 * data.borderStyle.width; - } - - var horizontalRadius = data.borderStyle.horizontalCornerRadius; - var verticalRadius = data.borderStyle.verticalCornerRadius; - if (horizontalRadius > 0 || verticalRadius > 0) { - var radius = horizontalRadius + 'px / ' + verticalRadius + 'px'; - CustomStyle.setProp('borderRadius', container, radius); - } - - switch (data.borderStyle.style) { - case AnnotationBorderStyleType.SOLID: - container.style.borderStyle = 'solid'; - break; - - case AnnotationBorderStyleType.DASHED: - container.style.borderStyle = 'dashed'; - break; - - case AnnotationBorderStyleType.BEVELED: - warn('Unimplemented border style: beveled'); - break; - - case AnnotationBorderStyleType.INSET: - warn('Unimplemented border style: inset'); - break; - - case AnnotationBorderStyleType.UNDERLINE: - container.style.borderBottomStyle = 'solid'; - break; - - default: - break; - } - - if (data.color) { - container.style.borderColor = - Util.makeCssRgb(data.color[0] | 0, - data.color[1] | 0, - data.color[2] | 0); - } else { - // Transparent (invisible) border, so do not draw it at all. - container.style.borderWidth = 0; - } - } - - container.style.left = rect[0] + 'px'; - container.style.top = rect[1] + 'px'; - - container.style.width = width + 'px'; - container.style.height = height + 'px'; - - return container; - }, - - /** - * Render the annotation's HTML element in the empty container. - * - * @public - * @memberof AnnotationElement - */ - render: function AnnotationElement_render() { - throw new Error('Abstract method AnnotationElement.render called'); - } - }; - - return AnnotationElement; -})(); - -/** - * @class - * @alias LinkAnnotationElement - */ -var LinkAnnotationElement = (function LinkAnnotationElementClosure() { - function LinkAnnotationElement(parameters) { - AnnotationElement.call(this, parameters); - } - - Util.inherit(LinkAnnotationElement, AnnotationElement, { - /** - * Render the link annotation's HTML element in the empty container. - * - * @public - * @memberof LinkAnnotationElement - * @returns {HTMLSectionElement} - */ - render: function LinkAnnotationElement_render() { - this.container.className = 'linkAnnotation'; - - var link = document.createElement('a'); - link.href = link.title = this.data.url || ''; - - if (this.data.url && isExternalLinkTargetSet()) { - link.target = LinkTargetStringMap[PDFJS.externalLinkTarget]; - } - - // Strip referrer from the URL. - if (this.data.url) { - link.rel = PDFJS.externalLinkRel; - } - - if (!this.data.url) { - if (this.data.action) { - this._bindNamedAction(link, this.data.action); - } else { - this._bindLink(link, ('dest' in this.data) ? this.data.dest : null); - } - } - - this.container.appendChild(link); - return this.container; - }, - - /** - * Bind internal links to the link element. - * - * @private - * @param {Object} link - * @param {Object} destination - * @memberof LinkAnnotationElement - */ - _bindLink: function LinkAnnotationElement_bindLink(link, destination) { - var self = this; - - link.href = this.linkService.getDestinationHash(destination); - link.onclick = function() { - if (destination) { - self.linkService.navigateTo(destination); - } - return false; - }; - if (destination) { - link.className = 'internalLink'; - } - }, - - /** - * Bind named actions to the link element. - * - * @private - * @param {Object} link - * @param {Object} action - * @memberof LinkAnnotationElement - */ - _bindNamedAction: - function LinkAnnotationElement_bindNamedAction(link, action) { - var self = this; - - link.href = this.linkService.getAnchorUrl(''); - link.onclick = function() { - self.linkService.executeNamedAction(action); - return false; - }; - link.className = 'internalLink'; - } - }); - - return LinkAnnotationElement; -})(); - -/** - * @class - * @alias TextAnnotationElement - */ -var TextAnnotationElement = (function TextAnnotationElementClosure() { - function TextAnnotationElement(parameters) { - AnnotationElement.call(this, parameters); - } - - Util.inherit(TextAnnotationElement, AnnotationElement, { - /** - * Render the text annotation's HTML element in the empty container. - * - * @public - * @memberof TextAnnotationElement - * @returns {HTMLSectionElement} - */ - render: function TextAnnotationElement_render() { - this.container.className = 'textAnnotation'; - - var image = document.createElement('img'); - image.style.height = this.container.style.height; - image.style.width = this.container.style.width; - image.src = PDFJS.imageResourcesPath + 'annotation-' + - this.data.name.toLowerCase() + '.svg'; - image.alt = '[{{type}} Annotation]'; - image.dataset.l10nId = 'text_annotation_type'; - image.dataset.l10nArgs = JSON.stringify({type: this.data.name}); - - if (!this.data.hasPopup) { - var popupElement = new PopupElement({ - container: this.container, - trigger: image, - color: this.data.color, - title: this.data.title, - contents: this.data.contents, - hideWrapper: true - }); - var popup = popupElement.render(); - - // Position the popup next to the Text annotation's container. - popup.style.left = image.style.width; - - this.container.appendChild(popup); - } - - this.container.appendChild(image); - return this.container; - } - }); - - return TextAnnotationElement; -})(); - -/** - * @class - * @alias WidgetAnnotationElement - */ -var WidgetAnnotationElement = (function WidgetAnnotationElementClosure() { - function WidgetAnnotationElement(parameters) { - AnnotationElement.call(this, parameters); - } - - Util.inherit(WidgetAnnotationElement, AnnotationElement, { - /** - * Render the widget annotation's HTML element in the empty container. - * - * @public - * @memberof WidgetAnnotationElement - * @returns {HTMLSectionElement} - */ - render: function WidgetAnnotationElement_render() { - var content = document.createElement('div'); - content.textContent = this.data.fieldValue; - var textAlignment = this.data.textAlignment; - content.style.textAlign = ['left', 'center', 'right'][textAlignment]; - content.style.verticalAlign = 'middle'; - content.style.display = 'table-cell'; - - var font = (this.data.fontRefName ? - this.page.commonObjs.getData(this.data.fontRefName) : null); - this._setTextStyle(content, font); - - this.container.appendChild(content); - return this.container; - }, - - /** - * Apply text styles to the text in the element. - * - * @private - * @param {HTMLDivElement} element - * @param {Object} font - * @memberof WidgetAnnotationElement - */ - _setTextStyle: - function WidgetAnnotationElement_setTextStyle(element, font) { - // TODO: This duplicates some of the logic in CanvasGraphics.setFont(). - var style = element.style; - style.fontSize = this.data.fontSize + 'px'; - style.direction = (this.data.fontDirection < 0 ? 'rtl': 'ltr'); - - if (!font) { - return; - } - - style.fontWeight = (font.black ? - (font.bold ? '900' : 'bold') : - (font.bold ? 'bold' : 'normal')); - style.fontStyle = (font.italic ? 'italic' : 'normal'); - - // Use a reasonable default font if the font doesn't specify a fallback. - var fontFamily = font.loadedName ? '"' + font.loadedName + '", ' : ''; - var fallbackName = font.fallbackName || 'Helvetica, sans-serif'; - style.fontFamily = fontFamily + fallbackName; - } - }); - - return WidgetAnnotationElement; -})(); - -/** - * @class - * @alias PopupAnnotationElement - */ -var PopupAnnotationElement = (function PopupAnnotationElementClosure() { - function PopupAnnotationElement(parameters) { - AnnotationElement.call(this, parameters); - } - - Util.inherit(PopupAnnotationElement, AnnotationElement, { - /** - * Render the popup annotation's HTML element in the empty container. - * - * @public - * @memberof PopupAnnotationElement - * @returns {HTMLSectionElement} - */ - render: function PopupAnnotationElement_render() { - this.container.className = 'popupAnnotation'; - - var selector = '[data-annotation-id="' + this.data.parentId + '"]'; - var parentElement = this.layer.querySelector(selector); - if (!parentElement) { - return this.container; - } - - var popup = new PopupElement({ - container: this.container, - trigger: parentElement, - color: this.data.color, - title: this.data.title, - contents: this.data.contents - }); - - // Position the popup next to the parent annotation's container. - // PDF viewers ignore a popup annotation's rectangle. - var parentLeft = parseFloat(parentElement.style.left); - var parentWidth = parseFloat(parentElement.style.width); - CustomStyle.setProp('transformOrigin', this.container, - -(parentLeft + parentWidth) + 'px -' + - parentElement.style.top); - this.container.style.left = (parentLeft + parentWidth) + 'px'; - - this.container.appendChild(popup.render()); - return this.container; - } - }); - - return PopupAnnotationElement; -})(); - -/** - * @class - * @alias PopupElement - */ -var PopupElement = (function PopupElementClosure() { - var BACKGROUND_ENLIGHT = 0.7; - - function PopupElement(parameters) { - this.container = parameters.container; - this.trigger = parameters.trigger; - this.color = parameters.color; - this.title = parameters.title; - this.contents = parameters.contents; - this.hideWrapper = parameters.hideWrapper || false; - - this.pinned = false; - } - - PopupElement.prototype = /** @lends PopupElement.prototype */ { - /** - * Render the popup's HTML element. - * - * @public - * @memberof PopupElement - * @returns {HTMLSectionElement} - */ - render: function PopupElement_render() { - var wrapper = document.createElement('div'); - wrapper.className = 'popupWrapper'; - - // For Popup annotations we hide the entire section because it contains - // only the popup. However, for Text annotations without a separate Popup - // annotation, we cannot hide the entire container as the image would - // disappear too. In that special case, hiding the wrapper suffices. - this.hideElement = (this.hideWrapper ? wrapper : this.container); - this.hideElement.setAttribute('hidden', true); - - var popup = document.createElement('div'); - popup.className = 'popup'; - - var color = this.color; - if (color) { - // Enlighten the color. - var r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0]; - var g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1]; - var b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2]; - popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0); - } - - var contents = this._formatContents(this.contents); - var title = document.createElement('h1'); - title.textContent = this.title; - - // Attach the event listeners to the trigger element. - this.trigger.addEventListener('click', this._toggle.bind(this)); - this.trigger.addEventListener('mouseover', this._show.bind(this, false)); - this.trigger.addEventListener('mouseout', this._hide.bind(this, false)); - popup.addEventListener('click', this._hide.bind(this, true)); - - popup.appendChild(title); - popup.appendChild(contents); - wrapper.appendChild(popup); - return wrapper; - }, - - /** - * Format the contents of the popup by adding newlines where necessary. - * - * @private - * @param {string} contents - * @memberof PopupElement - * @returns {HTMLParagraphElement} - */ - _formatContents: function PopupElement_formatContents(contents) { - var p = document.createElement('p'); - var lines = contents.split(/(?:\r\n?|\n)/); - for (var i = 0, ii = lines.length; i < ii; ++i) { - var line = lines[i]; - p.appendChild(document.createTextNode(line)); - if (i < (ii - 1)) { - p.appendChild(document.createElement('br')); - } - } - return p; - }, - - /** - * Toggle the visibility of the popup. - * - * @private - * @memberof PopupElement - */ - _toggle: function PopupElement_toggle() { - if (this.pinned) { - this._hide(true); - } else { - this._show(true); - } - }, - - /** - * Show the popup. - * - * @private - * @param {boolean} pin - * @memberof PopupElement - */ - _show: function PopupElement_show(pin) { - if (pin) { - this.pinned = true; - } - if (this.hideElement.hasAttribute('hidden')) { - this.hideElement.removeAttribute('hidden'); - this.container.style.zIndex += 1; - } - }, - - /** - * Hide the popup. - * - * @private - * @param {boolean} unpin - * @memberof PopupElement - */ - _hide: function PopupElement_hide(unpin) { - if (unpin) { - this.pinned = false; - } - if (!this.hideElement.hasAttribute('hidden') && !this.pinned) { - this.hideElement.setAttribute('hidden', true); - this.container.style.zIndex -= 1; - } - } - }; - - return PopupElement; -})(); - -/** - * @class - * @alias UnderlineAnnotationElement - */ -var UnderlineAnnotationElement = ( - function UnderlineAnnotationElementClosure() { - function UnderlineAnnotationElement(parameters) { - AnnotationElement.call(this, parameters); - } - - Util.inherit(UnderlineAnnotationElement, AnnotationElement, { - /** - * Render the underline annotation's HTML element in the empty container. - * - * @public - * @memberof UnderlineAnnotationElement - * @returns {HTMLSectionElement} - */ - render: function UnderlineAnnotationElement_render() { - this.container.className = 'underlineAnnotation'; - return this.container; - } - }); - - return UnderlineAnnotationElement; -})(); - -/** - * @typedef {Object} AnnotationLayerParameters - * @property {PageViewport} viewport - * @property {HTMLDivElement} div - * @property {Array} annotations - * @property {PDFPage} page - * @property {IPDFLinkService} linkService - */ - -/** - * @class - * @alias AnnotationLayer - */ -var AnnotationLayer = (function AnnotationLayerClosure() { - return { - /** - * Render a new annotation layer with all annotation elements. - * - * @public - * @param {AnnotationLayerParameters} parameters - * @memberof AnnotationLayer - */ - render: function AnnotationLayer_render(parameters) { - var annotationElementFactory = new AnnotationElementFactory(); - - for (var i = 0, ii = parameters.annotations.length; i < ii; i++) { - var data = parameters.annotations[i]; - if (!data || !data.hasHtml) { - continue; - } - - var properties = { - data: data, - layer: parameters.div, - page: parameters.page, - viewport: parameters.viewport, - linkService: parameters.linkService - }; - var element = annotationElementFactory.create(properties); - parameters.div.appendChild(element.render()); - } - }, - - /** - * Update the annotation elements on existing annotation layer. - * - * @public - * @param {AnnotationLayerParameters} parameters - * @memberof AnnotationLayer - */ - update: function AnnotationLayer_update(parameters) { - for (var i = 0, ii = parameters.annotations.length; i < ii; i++) { - var data = parameters.annotations[i]; - var element = parameters.div.querySelector( - '[data-annotation-id="' + data.id + '"]'); - if (element) { - CustomStyle.setProp('transform', element, - 'matrix(' + parameters.viewport.transform.join(',') + ')'); - } - } - parameters.div.removeAttribute('hidden'); - } - }; -})(); - -PDFJS.AnnotationLayer = AnnotationLayer; - -exports.AnnotationLayer = AnnotationLayer; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayFontLoader = {}), root.pdfjsSharedUtil, - root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedUtil, sharedGlobal) { - -var assert = sharedUtil.assert; -var bytesToString = sharedUtil.bytesToString; -var string32 = sharedUtil.string32; -var shadow = sharedUtil.shadow; -var warn = sharedUtil.warn; - -var PDFJS = sharedGlobal.PDFJS; -var globalScope = sharedGlobal.globalScope; -var isWorker = sharedGlobal.isWorker; - -function FontLoader(docId) { - this.docId = docId; - this.styleElement = null; - this.nativeFontFaces = []; - this.loadTestFontId = 0; - this.loadingContext = { - requests: [], - nextRequestId: 0 - }; -} -FontLoader.prototype = { - insertRule: function fontLoaderInsertRule(rule) { - var styleElement = this.styleElement; - if (!styleElement) { - styleElement = this.styleElement = document.createElement('style'); - styleElement.id = 'PDFJS_FONT_STYLE_TAG_' + this.docId; - document.documentElement.getElementsByTagName('head')[0].appendChild( - styleElement); - } - - var styleSheet = styleElement.sheet; - styleSheet.insertRule(rule, styleSheet.cssRules.length); - }, - - clear: function fontLoaderClear() { - var styleElement = this.styleElement; - if (styleElement) { - styleElement.parentNode.removeChild(styleElement); - styleElement = this.styleElement = null; - } - this.nativeFontFaces.forEach(function(nativeFontFace) { - document.fonts.delete(nativeFontFace); - }); - this.nativeFontFaces.length = 0; - }, - get loadTestFont() { - // This is a CFF font with 1 glyph for '.' that fills its entire width and - // height. - return shadow(this, 'loadTestFont', atob( - 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' + - 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' + - 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' + - 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' + - 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' + - 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' + - 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' + - 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' + - 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' + - 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' + - 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' + - 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' + - 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + - 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' + - 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' + - 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' + - 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' + - 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' + - 'ABAAAAAAAAAAAD6AAAAAAAAA==' - )); - }, - - addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) { - this.nativeFontFaces.push(nativeFontFace); - document.fonts.add(nativeFontFace); - }, - - bind: function fontLoaderBind(fonts, callback) { - assert(!isWorker, 'bind() shall be called from main thread'); - - var rules = []; - var fontsToLoad = []; - var fontLoadPromises = []; - var getNativeFontPromise = function(nativeFontFace) { - // Return a promise that is always fulfilled, even when the font fails to - // load. - return nativeFontFace.loaded.catch(function(e) { - warn('Failed to load font "' + nativeFontFace.family + '": ' + e); - }); - }; - for (var i = 0, ii = fonts.length; i < ii; i++) { - var font = fonts[i]; - - // Add the font to the DOM only once or skip if the font - // is already loaded. - if (font.attached || font.loading === false) { - continue; - } - font.attached = true; - - if (FontLoader.isFontLoadingAPISupported) { - var nativeFontFace = font.createNativeFontFace(); - if (nativeFontFace) { - this.addNativeFontFace(nativeFontFace); - fontLoadPromises.push(getNativeFontPromise(nativeFontFace)); - } - } else { - var rule = font.createFontFaceRule(); - if (rule) { - this.insertRule(rule); - rules.push(rule); - fontsToLoad.push(font); - } - } - } - - var request = this.queueLoadingCallback(callback); - if (FontLoader.isFontLoadingAPISupported) { - Promise.all(fontLoadPromises).then(function() { - request.complete(); - }); - } else if (rules.length > 0 && !FontLoader.isSyncFontLoadingSupported) { - this.prepareFontLoadEvent(rules, fontsToLoad, request); - } else { - request.complete(); - } - }, - - queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) { - function LoadLoader_completeRequest() { - assert(!request.end, 'completeRequest() cannot be called twice'); - request.end = Date.now(); - - // sending all completed requests in order how they were queued - while (context.requests.length > 0 && context.requests[0].end) { - var otherRequest = context.requests.shift(); - setTimeout(otherRequest.callback, 0); - } - } - - var context = this.loadingContext; - var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++); - var request = { - id: requestId, - complete: LoadLoader_completeRequest, - callback: callback, - started: Date.now() - }; - context.requests.push(request); - return request; - }, - - prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules, - fonts, - request) { - /** Hack begin */ - // There's currently no event when a font has finished downloading so the - // following code is a dirty hack to 'guess' when a font is - // ready. It's assumed fonts are loaded in order, so add a known test - // font after the desired fonts and then test for the loading of that - // test font. - - function int32(data, offset) { - return (data.charCodeAt(offset) << 24) | - (data.charCodeAt(offset + 1) << 16) | - (data.charCodeAt(offset + 2) << 8) | - (data.charCodeAt(offset + 3) & 0xff); - } - - function spliceString(s, offset, remove, insert) { - var chunk1 = s.substr(0, offset); - var chunk2 = s.substr(offset + remove); - return chunk1 + insert + chunk2; - } - - var i, ii; - - var canvas = document.createElement('canvas'); - canvas.width = 1; - canvas.height = 1; - var ctx = canvas.getContext('2d'); - - var called = 0; - function isFontReady(name, callback) { - called++; - // With setTimeout clamping this gives the font ~100ms to load. - if(called > 30) { - warn('Load test font never loaded.'); - callback(); - return; - } - ctx.font = '30px ' + name; - ctx.fillText('.', 0, 20); - var imageData = ctx.getImageData(0, 0, 1, 1); - if (imageData.data[3] > 0) { - callback(); - return; - } - setTimeout(isFontReady.bind(null, name, callback)); - } - - var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++; - // Chromium seems to cache fonts based on a hash of the actual font data, - // so the font must be modified for each load test else it will appear to - // be loaded already. - // TODO: This could maybe be made faster by avoiding the btoa of the full - // font by splitting it in chunks before hand and padding the font id. - var data = this.loadTestFont; - var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum) - data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, - loadTestFontId); - // CFF checksum is important for IE, adjusting it - var CFF_CHECKSUM_OFFSET = 16; - var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X' - var checksum = int32(data, CFF_CHECKSUM_OFFSET); - for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) { - checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0; - } - if (i < loadTestFontId.length) { // align to 4 bytes boundary - checksum = (checksum - XXXX_VALUE + - int32(loadTestFontId + 'XXX', i)) | 0; - } - data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum)); - - var url = 'url(data:font/opentype;base64,' + btoa(data) + ');'; - var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' + - url + '}'; - this.insertRule(rule); - - var names = []; - for (i = 0, ii = fonts.length; i < ii; i++) { - names.push(fonts[i].loadedName); - } - names.push(loadTestFontId); - - var div = document.createElement('div'); - div.setAttribute('style', - 'visibility: hidden;' + - 'width: 10px; height: 10px;' + - 'position: absolute; top: 0px; left: 0px;'); - for (i = 0, ii = names.length; i < ii; ++i) { - var span = document.createElement('span'); - span.textContent = 'Hi'; - span.style.fontFamily = names[i]; - div.appendChild(span); - } - document.body.appendChild(div); - - isFontReady(loadTestFontId, function() { - document.body.removeChild(div); - request.complete(); - }); - /** Hack end */ - } -}; -FontLoader.isFontLoadingAPISupported = (!isWorker && - typeof document !== 'undefined' && !!document.fonts); -Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', { - get: function () { - var supported = false; - - // User agent string sniffing is bad, but there is no reliable way to tell - // if font is fully loaded and ready to be used with canvas. - var userAgent = window.navigator.userAgent; - var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent); - if (m && m[1] >= 14) { - supported = true; - } - // TODO other browsers - if (userAgent === 'node') { - supported = true; - } - return shadow(FontLoader, 'isSyncFontLoadingSupported', supported); - }, - enumerable: true, - configurable: true -}); - -var FontFaceObject = (function FontFaceObjectClosure() { - function FontFaceObject(translatedData) { - this.compiledGlyphs = {}; - // importing translated data - for (var i in translatedData) { - this[i] = translatedData[i]; - } - } - Object.defineProperty(FontFaceObject, 'isEvalSupported', { - get: function () { - var evalSupport = false; - if (PDFJS.isEvalSupported) { - try { - /* jshint evil: true */ - new Function(''); - evalSupport = true; - } catch (e) {} - } - return shadow(this, 'isEvalSupported', evalSupport); - }, - enumerable: true, - configurable: true - }); - FontFaceObject.prototype = { - createNativeFontFace: function FontFaceObject_createNativeFontFace() { - if (!this.data) { - return null; - } - - if (PDFJS.disableFontFace) { - this.disableFontFace = true; - return null; - } - - var nativeFontFace = new FontFace(this.loadedName, this.data, {}); - - if (PDFJS.pdfBug && 'FontInspector' in globalScope && - globalScope['FontInspector'].enabled) { - globalScope['FontInspector'].fontAdded(this); - } - return nativeFontFace; - }, - - createFontFaceRule: function FontFaceObject_createFontFaceRule() { - if (!this.data) { - return null; - } - - if (PDFJS.disableFontFace) { - this.disableFontFace = true; - return null; - } - - var data = bytesToString(new Uint8Array(this.data)); - var fontName = this.loadedName; - - // Add the font-face rule to the document - var url = ('url(data:' + this.mimetype + ';base64,' + - window.btoa(data) + ');'); - var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}'; - - if (PDFJS.pdfBug && 'FontInspector' in globalScope && - globalScope['FontInspector'].enabled) { - globalScope['FontInspector'].fontAdded(this, url); - } - - return rule; - }, - - getPathGenerator: - function FontFaceObject_getPathGenerator(objs, character) { - if (!(character in this.compiledGlyphs)) { - var cmds = objs.get(this.loadedName + '_path_' + character); - var current, i, len; - - // If we can, compile cmds into JS for MAXIMUM SPEED - if (FontFaceObject.isEvalSupported) { - var args, js = ''; - for (i = 0, len = cmds.length; i < len; i++) { - current = cmds[i]; - - if (current.args !== undefined) { - args = current.args.join(','); - } else { - args = ''; - } - - js += 'c.' + current.cmd + '(' + args + ');\n'; - } - /* jshint -W054 */ - this.compiledGlyphs[character] = new Function('c', 'size', js); - } else { - // But fall back on using Function.prototype.apply() if we're - // blocked from using eval() for whatever reason (like CSP policies) - this.compiledGlyphs[character] = function(c, size) { - for (i = 0, len = cmds.length; i < len; i++) { - current = cmds[i]; - - if (current.cmd === 'scale') { - current.args = [size, -size]; - } - - c[current.cmd].apply(c, current.args); - } - }; - } - } - return this.compiledGlyphs[character]; - } - }; - return FontFaceObject; -})(); - -exports.FontFaceObject = FontFaceObject; -exports.FontLoader = FontLoader; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayMetadata = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { - -var error = sharedUtil.error; - -var Metadata = PDFJS.Metadata = (function MetadataClosure() { - function fixMetadata(meta) { - return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) { - var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g, - function(code, d1, d2, d3) { - return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1); - }); - var chars = ''; - for (var i = 0; i < bytes.length; i += 2) { - var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1); - chars += code >= 32 && code < 127 && code !== 60 && code !== 62 && - code !== 38 && false ? String.fromCharCode(code) : - '&#x' + (0x10000 + code).toString(16).substring(1) + ';'; - } - return '>' + chars; - }); - } - - function Metadata(meta) { - if (typeof meta === 'string') { - // Ghostscript produces invalid metadata - meta = fixMetadata(meta); - - var parser = new DOMParser(); - meta = parser.parseFromString(meta, 'application/xml'); - } else if (!(meta instanceof Document)) { - error('Metadata: Invalid metadata object'); - } - - this.metaDocument = meta; - this.metadata = {}; - this.parse(); - } - - Metadata.prototype = { - parse: function Metadata_parse() { - var doc = this.metaDocument; - var rdf = doc.documentElement; - - if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in - rdf = rdf.firstChild; - while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') { - rdf = rdf.nextSibling; - } - } - - var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null; - if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) { - return; - } - - var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength; - for (i = 0, length = children.length; i < length; i++) { - desc = children[i]; - if (desc.nodeName.toLowerCase() !== 'rdf:description') { - continue; - } - - for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) { - if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') { - entry = desc.childNodes[ii]; - name = entry.nodeName.toLowerCase(); - this.metadata[name] = entry.textContent.trim(); - } - } - } - }, - - get: function Metadata_get(name) { - return this.metadata[name] || null; - }, - - has: function Metadata_has(name) { - return typeof this.metadata[name] !== 'undefined'; - } - }; - - return Metadata; -})(); - -exports.Metadata = Metadata; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayTextLayer = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { - -var createPromiseCapability = sharedUtil.createPromiseCapability; - -/** - * Text layer render parameters. - * - * @typedef {Object} TextLayerRenderParameters - * @property {TextContent} textContent - Text content to render (the object is - * returned by the page's getTextContent() method). - * @property {HTMLElement} container - HTML element that will contain text runs. - * @property {PDFJS.PageViewport} viewport - The target viewport to properly - * layout the text runs. - * @property {Array} textDivs - (optional) HTML elements that are correspond - * the text items of the textContent input. This is output and shall be - * initially be set to empty array. - * @property {number} timeout - (optional) Delay in milliseconds before - * rendering of the text runs occurs. - */ -var renderTextLayer = (function renderTextLayerClosure() { - var MAX_TEXT_DIVS_TO_RENDER = 100000; - - var NonWhitespaceRegexp = /\S/; - - function isAllWhitespace(str) { - return !NonWhitespaceRegexp.test(str); - } - - function appendText(textDivs, viewport, geom, styles) { - var style = styles[geom.fontName]; - var textDiv = document.createElement('div'); - textDivs.push(textDiv); - if (isAllWhitespace(geom.str)) { - textDiv.dataset.isWhitespace = true; - return; - } - var tx = PDFJS.Util.transform(viewport.transform, geom.transform); - var angle = Math.atan2(tx[1], tx[0]); - if (style.vertical) { - angle += Math.PI / 2; - } - var fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3])); - var fontAscent = fontHeight; - if (style.ascent) { - fontAscent = style.ascent * fontAscent; - } else if (style.descent) { - fontAscent = (1 + style.descent) * fontAscent; - } - - var left; - var top; - if (angle === 0) { - left = tx[4]; - top = tx[5] - fontAscent; - } else { - left = tx[4] + (fontAscent * Math.sin(angle)); - top = tx[5] - (fontAscent * Math.cos(angle)); - } - textDiv.style.left = left + 'px'; - textDiv.style.top = top + 'px'; - textDiv.style.fontSize = fontHeight + 'px'; - textDiv.style.fontFamily = style.fontFamily; - - textDiv.textContent = geom.str; - // |fontName| is only used by the Font Inspector. This test will succeed - // when e.g. the Font Inspector is off but the Stepper is on, but it's - // not worth the effort to do a more accurate test. - if (PDFJS.pdfBug) { - textDiv.dataset.fontName = geom.fontName; - } - // Storing into dataset will convert number into string. - if (angle !== 0) { - textDiv.dataset.angle = angle * (180 / Math.PI); - } - // We don't bother scaling single-char text divs, because it has very - // little effect on text highlighting. This makes scrolling on docs with - // lots of such divs a lot faster. - if (geom.str.length > 1) { - if (style.vertical) { - textDiv.dataset.canvasWidth = geom.height * viewport.scale; - } else { - textDiv.dataset.canvasWidth = geom.width * viewport.scale; - } - } - } - - function render(task) { - if (task._canceled) { - return; - } - var textLayerFrag = task._container; - var textDivs = task._textDivs; - var capability = task._capability; - var textDivsLength = textDivs.length; - - // No point in rendering many divs as it would make the browser - // unusable even after the divs are rendered. - if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) { - capability.resolve(); - return; - } - - var canvas = document.createElement('canvas'); - var ctx = canvas.getContext('2d', {alpha: false}); - - var lastFontSize; - var lastFontFamily; - for (var i = 0; i < textDivsLength; i++) { - var textDiv = textDivs[i]; - if (textDiv.dataset.isWhitespace !== undefined) { - continue; - } - - var fontSize = textDiv.style.fontSize; - var fontFamily = textDiv.style.fontFamily; - - // Only build font string and set to context if different from last. - if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) { - ctx.font = fontSize + ' ' + fontFamily; - lastFontSize = fontSize; - lastFontFamily = fontFamily; - } - - var width = ctx.measureText(textDiv.textContent).width; - if (width > 0) { - textLayerFrag.appendChild(textDiv); - var transform; - if (textDiv.dataset.canvasWidth !== undefined) { - // Dataset values come of type string. - var textScale = textDiv.dataset.canvasWidth / width; - transform = 'scaleX(' + textScale + ')'; - } else { - transform = ''; - } - var rotation = textDiv.dataset.angle; - if (rotation) { - transform = 'rotate(' + rotation + 'deg) ' + transform; - } - if (transform) { - PDFJS.CustomStyle.setProp('transform' , textDiv, transform); - } - } - } - capability.resolve(); - } - - /** - * Text layer rendering task. - * - * @param {TextContent} textContent - * @param {HTMLElement} container - * @param {PDFJS.PageViewport} viewport - * @param {Array} textDivs - * @private - */ - function TextLayerRenderTask(textContent, container, viewport, textDivs) { - this._textContent = textContent; - this._container = container; - this._viewport = viewport; - textDivs = textDivs || []; - this._textDivs = textDivs; - this._canceled = false; - this._capability = createPromiseCapability(); - this._renderTimer = null; - } - TextLayerRenderTask.prototype = { - get promise() { - return this._capability.promise; - }, - - cancel: function TextLayer_cancel() { - this._canceled = true; - if (this._renderTimer !== null) { - clearTimeout(this._renderTimer); - this._renderTimer = null; - } - this._capability.reject('canceled'); - }, - - _render: function TextLayer_render(timeout) { - var textItems = this._textContent.items; - var styles = this._textContent.styles; - var textDivs = this._textDivs; - var viewport = this._viewport; - for (var i = 0, len = textItems.length; i < len; i++) { - appendText(textDivs, viewport, textItems[i], styles); - } - - if (!timeout) { // Render right away - render(this); - } else { // Schedule - var self = this; - this._renderTimer = setTimeout(function() { - render(self); - self._renderTimer = null; - }, timeout); - } - } - }; - - - /** - * Starts rendering of the text layer. - * - * @param {TextLayerRenderParameters} renderParameters - * @returns {TextLayerRenderTask} - */ - function renderTextLayer(renderParameters) { - var task = new TextLayerRenderTask(renderParameters.textContent, - renderParameters.container, - renderParameters.viewport, - renderParameters.textDivs); - task._render(renderParameters.timeout); - return task; - } - - return renderTextLayer; -})(); - -PDFJS.renderTextLayer = renderTextLayer; - -exports.renderTextLayer = renderTextLayer; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayWebGL = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { - -var shadow = sharedUtil.shadow; - -var WebGLUtils = (function WebGLUtilsClosure() { - function loadShader(gl, code, shaderType) { - var shader = gl.createShader(shaderType); - gl.shaderSource(shader, code); - gl.compileShader(shader); - var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); - if (!compiled) { - var errorMsg = gl.getShaderInfoLog(shader); - throw new Error('Error during shader compilation: ' + errorMsg); - } - return shader; - } - function createVertexShader(gl, code) { - return loadShader(gl, code, gl.VERTEX_SHADER); - } - function createFragmentShader(gl, code) { - return loadShader(gl, code, gl.FRAGMENT_SHADER); - } - function createProgram(gl, shaders) { - var program = gl.createProgram(); - for (var i = 0, ii = shaders.length; i < ii; ++i) { - gl.attachShader(program, shaders[i]); - } - gl.linkProgram(program); - var linked = gl.getProgramParameter(program, gl.LINK_STATUS); - if (!linked) { - var errorMsg = gl.getProgramInfoLog(program); - throw new Error('Error during program linking: ' + errorMsg); - } - return program; - } - function createTexture(gl, image, textureId) { - gl.activeTexture(textureId); - var texture = gl.createTexture(); - gl.bindTexture(gl.TEXTURE_2D, texture); - - // Set the parameters so we can render any size image. - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); - - // Upload the image into the texture. - gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); - return texture; - } - - var currentGL, currentCanvas; - function generateGL() { - if (currentGL) { - return; - } - currentCanvas = document.createElement('canvas'); - currentGL = currentCanvas.getContext('webgl', - { premultipliedalpha: false }); - } - - var smaskVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec2 a_texCoord; \ - \ - uniform vec2 u_resolution; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_texCoord = a_texCoord; \ - } '; - - var smaskFragmentShaderCode = '\ - precision mediump float; \ - \ - uniform vec4 u_backdrop; \ - uniform int u_subtype; \ - uniform sampler2D u_image; \ - uniform sampler2D u_mask; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec4 imageColor = texture2D(u_image, v_texCoord); \ - vec4 maskColor = texture2D(u_mask, v_texCoord); \ - if (u_backdrop.a > 0.0) { \ - maskColor.rgb = maskColor.rgb * maskColor.a + \ - u_backdrop.rgb * (1.0 - maskColor.a); \ - } \ - float lum; \ - if (u_subtype == 0) { \ - lum = maskColor.a; \ - } else { \ - lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ - maskColor.b * 0.11; \ - } \ - imageColor.a *= lum; \ - imageColor.rgb *= imageColor.a; \ - gl_FragColor = imageColor; \ - } '; - - var smaskCache = null; - - function initSmaskGL() { - var canvas, gl; - - generateGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; - - // setup a GLSL program - var vertexShader = createVertexShader(gl, smaskVertexShaderCode); - var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); - - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); - cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); - - var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); - var texLayerLocation = gl.getUniformLocation(program, 'u_image'); - var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); - - // provide texture coordinates for the rectangle. - var texCoordBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0.0, 0.0, - 1.0, 0.0, - 0.0, 1.0, - 0.0, 1.0, - 1.0, 0.0, - 1.0, 1.0]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(texCoordLocation); - gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); - - gl.uniform1i(texLayerLocation, 0); - gl.uniform1i(texMaskLocation, 1); - - smaskCache = cache; - } - - function composeSMask(layer, mask, properties) { - var width = layer.width, height = layer.height; - - if (!smaskCache) { - initSmaskGL(); - } - var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); - - if (properties.backdrop) { - gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], - properties.backdrop[1], properties.backdrop[2], 1); - } else { - gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); - } - gl.uniform1i(cache.subtypeLocation, - properties.subtype === 'Luminosity' ? 1 : 0); - - // Create a textures - var texture = createTexture(gl, layer, gl.TEXTURE0); - var maskTexture = createTexture(gl, mask, gl.TEXTURE1); - - - // Create a buffer and put a single clipspace rectangle in - // it (2 triangles) - var buffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, buffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0, 0, - width, 0, - 0, height, - 0, height, - width, 0, - width, height]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - - // draw - gl.clearColor(0, 0, 0, 0); - gl.enable(gl.BLEND); - gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); - gl.clear(gl.COLOR_BUFFER_BIT); - - gl.drawArrays(gl.TRIANGLES, 0, 6); - - gl.flush(); - - gl.deleteTexture(texture); - gl.deleteTexture(maskTexture); - gl.deleteBuffer(buffer); - - return canvas; - } - - var figuresVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec3 a_color; \ - \ - uniform vec2 u_resolution; \ - uniform vec2 u_scale; \ - uniform vec2 u_offset; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - vec2 position = (a_position + u_offset) * u_scale; \ - vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_color = vec4(a_color / 255.0, 1.0); \ - } '; - - var figuresFragmentShaderCode = '\ - precision mediump float; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - gl_FragColor = v_color; \ - } '; - - var figuresCache = null; - - function initFiguresGL() { - var canvas, gl; - - generateGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; - - // setup a GLSL program - var vertexShader = createVertexShader(gl, figuresVertexShaderCode); - var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); - - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); - cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.colorLocation = gl.getAttribLocation(program, 'a_color'); - - figuresCache = cache; - } - - function drawFigures(width, height, backgroundColor, figures, context) { - if (!figuresCache) { - initFiguresGL(); - } - var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; - - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); - - // count triangle points - var count = 0; - var i, ii, rows; - for (i = 0, ii = figures.length; i < ii; i++) { - switch (figures[i].type) { - case 'lattice': - rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; - count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; - break; - case 'triangles': - count += figures[i].coords.length; - break; - } - } - // transfer data - var coords = new Float32Array(count * 2); - var colors = new Uint8Array(count * 3); - var coordsMap = context.coords, colorsMap = context.colors; - var pIndex = 0, cIndex = 0; - for (i = 0, ii = figures.length; i < ii; i++) { - var figure = figures[i], ps = figure.coords, cs = figure.colors; - switch (figure.type) { - case 'lattice': - var cols = figure.verticesPerRow; - rows = (ps.length / cols) | 0; - for (var row = 1; row < rows; row++) { - var offset = row * cols + 1; - for (var col = 1; col < cols; col++, offset++) { - coords[pIndex] = coordsMap[ps[offset - cols - 1]]; - coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; - coords[pIndex + 2] = coordsMap[ps[offset - cols]]; - coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; - coords[pIndex + 4] = coordsMap[ps[offset - 1]]; - coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; - colors[cIndex] = colorsMap[cs[offset - cols - 1]]; - colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; - colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; - colors[cIndex + 3] = colorsMap[cs[offset - cols]]; - colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; - colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; - colors[cIndex + 6] = colorsMap[cs[offset - 1]]; - colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; - colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; - - coords[pIndex + 6] = coords[pIndex + 2]; - coords[pIndex + 7] = coords[pIndex + 3]; - coords[pIndex + 8] = coords[pIndex + 4]; - coords[pIndex + 9] = coords[pIndex + 5]; - coords[pIndex + 10] = coordsMap[ps[offset]]; - coords[pIndex + 11] = coordsMap[ps[offset] + 1]; - colors[cIndex + 9] = colors[cIndex + 3]; - colors[cIndex + 10] = colors[cIndex + 4]; - colors[cIndex + 11] = colors[cIndex + 5]; - colors[cIndex + 12] = colors[cIndex + 6]; - colors[cIndex + 13] = colors[cIndex + 7]; - colors[cIndex + 14] = colors[cIndex + 8]; - colors[cIndex + 15] = colorsMap[cs[offset]]; - colors[cIndex + 16] = colorsMap[cs[offset] + 1]; - colors[cIndex + 17] = colorsMap[cs[offset] + 2]; - pIndex += 12; - cIndex += 18; - } - } - break; - case 'triangles': - for (var j = 0, jj = ps.length; j < jj; j++) { - coords[pIndex] = coordsMap[ps[j]]; - coords[pIndex + 1] = coordsMap[ps[j] + 1]; - colors[cIndex] = colorsMap[cs[j]]; - colors[cIndex + 1] = colorsMap[cs[j] + 1]; - colors[cIndex + 2] = colorsMap[cs[j] + 2]; - pIndex += 2; - cIndex += 3; - } - break; - } - } - - // draw - if (backgroundColor) { - gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, - backgroundColor[2] / 255, 1.0); - } else { - gl.clearColor(0, 0, 0, 0); - } - gl.clear(gl.COLOR_BUFFER_BIT); - - var coordsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - - var colorsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.colorLocation); - gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, - 0, 0); - - gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); - gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); - - gl.drawArrays(gl.TRIANGLES, 0, count); - - gl.flush(); - - gl.deleteBuffer(coordsBuffer); - gl.deleteBuffer(colorsBuffer); - - return canvas; - } - - function cleanup() { - if (smaskCache && smaskCache.canvas) { - smaskCache.canvas.width = 0; - smaskCache.canvas.height = 0; - } - if (figuresCache && figuresCache.canvas) { - figuresCache.canvas.width = 0; - figuresCache.canvas.height = 0; - } - smaskCache = null; - figuresCache = null; - } - - return { - get isEnabled() { - if (PDFJS.disableWebGL) { - return false; - } - var enabled = false; - try { - generateGL(); - enabled = !!currentGL; - } catch (e) { } - return shadow(this, 'isEnabled', enabled); - }, - composeSMask: composeSMask, - drawFigures: drawFigures, - clear: cleanup - }; -})(); - -exports.WebGLUtils = WebGLUtils; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayPatternHelper = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayWebGL); - } -}(this, function (exports, sharedUtil, displayWebGL) { - -var Util = sharedUtil.Util; -var info = sharedUtil.info; -var isArray = sharedUtil.isArray; -var error = sharedUtil.error; -var WebGLUtils = displayWebGL.WebGLUtils; - -var ShadingIRs = {}; - -ShadingIRs.RadialAxial = { - fromIR: function RadialAxial_fromIR(raw) { - var type = raw[1]; - var colorStops = raw[2]; - var p0 = raw[3]; - var p1 = raw[4]; - var r0 = raw[5]; - var r1 = raw[6]; - return { - type: 'Pattern', - getPattern: function RadialAxial_getPattern(ctx) { - var grad; - if (type === 'axial') { - grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); - } else if (type === 'radial') { - grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); - } - - for (var i = 0, ii = colorStops.length; i < ii; ++i) { - var c = colorStops[i]; - grad.addColorStop(c[0], c[1]); - } - return grad; - } - }; - } -}; - -var createMeshCanvas = (function createMeshCanvasClosure() { - function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { - // Very basic Gouraud-shaded triangle rasterization algorithm. - var coords = context.coords, colors = context.colors; - var bytes = data.data, rowSize = data.width * 4; - var tmp; - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - if (coords[p2 + 1] > coords[p3 + 1]) { - tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; - } - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - var x1 = (coords[p1] + context.offsetX) * context.scaleX; - var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; - var x2 = (coords[p2] + context.offsetX) * context.scaleX; - var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; - var x3 = (coords[p3] + context.offsetX) * context.scaleX; - var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; - if (y1 >= y3) { - return; - } - var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; - var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; - var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; - - var minY = Math.round(y1), maxY = Math.round(y3); - var xa, car, cag, cab; - var xb, cbr, cbg, cbb; - var k; - for (var y = minY; y <= maxY; y++) { - if (y < y2) { - k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); - xa = x1 - (x1 - x2) * k; - car = c1r - (c1r - c2r) * k; - cag = c1g - (c1g - c2g) * k; - cab = c1b - (c1b - c2b) * k; - } else { - k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); - xa = x2 - (x2 - x3) * k; - car = c2r - (c2r - c3r) * k; - cag = c2g - (c2g - c3g) * k; - cab = c2b - (c2b - c3b) * k; - } - k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); - xb = x1 - (x1 - x3) * k; - cbr = c1r - (c1r - c3r) * k; - cbg = c1g - (c1g - c3g) * k; - cbb = c1b - (c1b - c3b) * k; - var x1_ = Math.round(Math.min(xa, xb)); - var x2_ = Math.round(Math.max(xa, xb)); - var j = rowSize * y + x1_ * 4; - for (var x = x1_; x <= x2_; x++) { - k = (xa - x) / (xa - xb); - k = k < 0 ? 0 : k > 1 ? 1 : k; - bytes[j++] = (car - (car - cbr) * k) | 0; - bytes[j++] = (cag - (cag - cbg) * k) | 0; - bytes[j++] = (cab - (cab - cbb) * k) | 0; - bytes[j++] = 255; - } - } - } - - function drawFigure(data, figure, context) { - var ps = figure.coords; - var cs = figure.colors; - var i, ii; - switch (figure.type) { - case 'lattice': - var verticesPerRow = figure.verticesPerRow; - var rows = Math.floor(ps.length / verticesPerRow) - 1; - var cols = verticesPerRow - 1; - for (i = 0; i < rows; i++) { - var q = i * verticesPerRow; - for (var j = 0; j < cols; j++, q++) { - drawTriangle(data, context, - ps[q], ps[q + 1], ps[q + verticesPerRow], - cs[q], cs[q + 1], cs[q + verticesPerRow]); - drawTriangle(data, context, - ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], - cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); - } - } - break; - case 'triangles': - for (i = 0, ii = ps.length; i < ii; i += 3) { - drawTriangle(data, context, - ps[i], ps[i + 1], ps[i + 2], - cs[i], cs[i + 1], cs[i + 2]); - } - break; - default: - error('illigal figure'); - break; - } - } - - function createMeshCanvas(bounds, combinesScale, coords, colors, figures, - backgroundColor, cachedCanvases) { - // we will increase scale on some weird factor to let antialiasing take - // care of "rough" edges - var EXPECTED_SCALE = 1.1; - // MAX_PATTERN_SIZE is used to avoid OOM situation. - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var boundsWidth = Math.ceil(bounds[2]) - offsetX; - var boundsHeight = Math.ceil(bounds[3]) - offsetY; - - var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var scaleX = boundsWidth / width; - var scaleY = boundsHeight / height; - - var context = { - coords: coords, - colors: colors, - offsetX: -offsetX, - offsetY: -offsetY, - scaleX: 1 / scaleX, - scaleY: 1 / scaleY - }; - - var canvas, tmpCanvas, i, ii; - if (WebGLUtils.isEnabled) { - canvas = WebGLUtils.drawFigures(width, height, backgroundColor, - figures, context); - - // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 - tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); - tmpCanvas.context.drawImage(canvas, 0, 0); - canvas = tmpCanvas.canvas; - } else { - tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); - var tmpCtx = tmpCanvas.context; - - var data = tmpCtx.createImageData(width, height); - if (backgroundColor) { - var bytes = data.data; - for (i = 0, ii = bytes.length; i < ii; i += 4) { - bytes[i] = backgroundColor[0]; - bytes[i + 1] = backgroundColor[1]; - bytes[i + 2] = backgroundColor[2]; - bytes[i + 3] = 255; - } - } - for (i = 0; i < figures.length; i++) { - drawFigure(data, figures[i], context); - } - tmpCtx.putImageData(data, 0, 0); - canvas = tmpCanvas.canvas; - } - - return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, - scaleX: scaleX, scaleY: scaleY}; - } - return createMeshCanvas; -})(); - -ShadingIRs.Mesh = { - fromIR: function Mesh_fromIR(raw) { - //var type = raw[1]; - var coords = raw[2]; - var colors = raw[3]; - var figures = raw[4]; - var bounds = raw[5]; - var matrix = raw[6]; - //var bbox = raw[7]; - var background = raw[8]; - return { - type: 'Pattern', - getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { - var scale; - if (shadingFill) { - scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform); - } else { - // Obtain scale from matrix and current transformation matrix. - scale = Util.singularValueDecompose2dScale(owner.baseTransform); - if (matrix) { - var matrixScale = Util.singularValueDecompose2dScale(matrix); - scale = [scale[0] * matrixScale[0], - scale[1] * matrixScale[1]]; - } - } - - - // Rasterizing on the main thread since sending/queue large canvases - // might cause OOM. - var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, - colors, figures, shadingFill ? null : background, - owner.cachedCanvases); - - if (!shadingFill) { - ctx.setTransform.apply(ctx, owner.baseTransform); - if (matrix) { - ctx.transform.apply(ctx, matrix); - } - } - - ctx.translate(temporaryPatternCanvas.offsetX, - temporaryPatternCanvas.offsetY); - ctx.scale(temporaryPatternCanvas.scaleX, - temporaryPatternCanvas.scaleY); - - return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); - } - }; - } -}; - -ShadingIRs.Dummy = { - fromIR: function Dummy_fromIR() { - return { - type: 'Pattern', - getPattern: function Dummy_fromIR_getPattern() { - return 'hotpink'; - } - }; - } -}; - -function getShadingPatternFromIR(raw) { - var shadingIR = ShadingIRs[raw[0]]; - if (!shadingIR) { - error('Unknown IR type: ' + raw[0]); - } - return shadingIR.fromIR(raw); -} - -var TilingPattern = (function TilingPatternClosure() { - var PaintType = { - COLORED: 1, - UNCOLORED: 2 - }; - - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - - function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) { - this.operatorList = IR[2]; - this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; - this.bbox = IR[4]; - this.xstep = IR[5]; - this.ystep = IR[6]; - this.paintType = IR[7]; - this.tilingType = IR[8]; - this.color = color; - this.canvasGraphicsFactory = canvasGraphicsFactory; - this.baseTransform = baseTransform; - this.type = 'Pattern'; - this.ctx = ctx; - } - - TilingPattern.prototype = { - createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { - var operatorList = this.operatorList; - var bbox = this.bbox; - var xstep = this.xstep; - var ystep = this.ystep; - var paintType = this.paintType; - var tilingType = this.tilingType; - var color = this.color; - var canvasGraphicsFactory = this.canvasGraphicsFactory; - - info('TilingType: ' + tilingType); - - var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; - - var topLeft = [x0, y0]; - // we want the canvas to be as large as the step size - var botRight = [x0 + xstep, y0 + ystep]; - - var width = botRight[0] - topLeft[0]; - var height = botRight[1] - topLeft[1]; - - // Obtain scale from matrix and current transformation matrix. - var matrixScale = Util.singularValueDecompose2dScale(this.matrix); - var curMatrixScale = Util.singularValueDecompose2dScale( - this.baseTransform); - var combinedScale = [matrixScale[0] * curMatrixScale[0], - matrixScale[1] * curMatrixScale[1]]; - - // MAX_PATTERN_SIZE is used to avoid OOM situation. - // Use width and height values that are as close as possible to the end - // result when the pattern is used. Too low value makes the pattern look - // blurry. Too large value makes it look too crispy. - width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), - MAX_PATTERN_SIZE); - - height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), - MAX_PATTERN_SIZE); - - var tmpCanvas = owner.cachedCanvases.getCanvas('pattern', - width, height, true); - var tmpCtx = tmpCanvas.context; - var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx); - graphics.groupLevel = owner.groupLevel; - - this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); - - this.setScale(width, height, xstep, ystep); - this.transformToScale(graphics); - - // transform coordinates to pattern space - var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; - graphics.transform.apply(graphics, tmpTranslate); - - this.clipBbox(graphics, bbox, x0, y0, x1, y1); - - graphics.executeOperatorList(operatorList); - return tmpCanvas.canvas; - }, - - setScale: function TilingPattern_setScale(width, height, xstep, ystep) { - this.scale = [width / xstep, height / ystep]; - }, - - transformToScale: function TilingPattern_transformToScale(graphics) { - var scale = this.scale; - var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; - graphics.transform.apply(graphics, tmpScale); - }, - - scaleToContext: function TilingPattern_scaleToContext() { - var scale = this.scale; - this.ctx.scale(1 / scale[0], 1 / scale[1]); - }, - - clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { - if (bbox && isArray(bbox) && bbox.length === 4) { - var bboxWidth = x1 - x0; - var bboxHeight = y1 - y0; - graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight); - graphics.clip(); - graphics.endPath(); - } - }, - - setFillAndStrokeStyleToContext: - function setFillAndStrokeStyleToContext(context, paintType, color) { - switch (paintType) { - case PaintType.COLORED: - var ctx = this.ctx; - context.fillStyle = ctx.fillStyle; - context.strokeStyle = ctx.strokeStyle; - break; - case PaintType.UNCOLORED: - var cssColor = Util.makeCssRgb(color[0], color[1], color[2]); - context.fillStyle = cssColor; - context.strokeStyle = cssColor; - break; - default: - error('Unsupported paint type: ' + paintType); - } - }, - - getPattern: function TilingPattern_getPattern(ctx, owner) { - var temporaryPatternCanvas = this.createPatternCanvas(owner); - - ctx = this.ctx; - ctx.setTransform.apply(ctx, this.baseTransform); - ctx.transform.apply(ctx, this.matrix); - this.scaleToContext(); - - return ctx.createPattern(temporaryPatternCanvas, 'repeat'); - } - }; - - return TilingPattern; -})(); - -exports.getShadingPatternFromIR = getShadingPatternFromIR; -exports.TilingPattern = TilingPattern; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayCanvas = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL); - } -}(this, function (exports, sharedUtil, displayPatternHelper, displayWebGL) { - -var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; -var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; -var ImageKind = sharedUtil.ImageKind; -var OPS = sharedUtil.OPS; -var TextRenderingMode = sharedUtil.TextRenderingMode; -var Uint32ArrayView = sharedUtil.Uint32ArrayView; -var Util = sharedUtil.Util; -var assert = sharedUtil.assert; -var info = sharedUtil.info; -var isNum = sharedUtil.isNum; -var isArray = sharedUtil.isArray; -var error = sharedUtil.error; -var shadow = sharedUtil.shadow; -var warn = sharedUtil.warn; -var TilingPattern = displayPatternHelper.TilingPattern; -var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR; -var WebGLUtils = displayWebGL.WebGLUtils; - -// contexts store most of the state we need natively. -// However, PDF needs a bit more state, which we store here. - -// Minimal font size that would be used during canvas fillText operations. -var MIN_FONT_SIZE = 16; -// Maximum font size that would be used during canvas fillText operations. -var MAX_FONT_SIZE = 100; -var MAX_GROUP_SIZE = 4096; - -// Heuristic value used when enforcing minimum line widths. -var MIN_WIDTH_FACTOR = 0.65; - -var COMPILE_TYPE3_GLYPHS = true; -var MAX_SIZE_TO_COMPILE = 1000; - -var FULL_CHUNK_HEIGHT = 16; - -function createScratchCanvas(width, height) { - var canvas = document.createElement('canvas'); - canvas.width = width; - canvas.height = height; - return canvas; -} - -function addContextCurrentTransform(ctx) { - // If the context doesn't expose a `mozCurrentTransform`, add a JS based one. - if (!ctx.mozCurrentTransform) { - ctx._originalSave = ctx.save; - ctx._originalRestore = ctx.restore; - ctx._originalRotate = ctx.rotate; - ctx._originalScale = ctx.scale; - ctx._originalTranslate = ctx.translate; - ctx._originalTransform = ctx.transform; - ctx._originalSetTransform = ctx.setTransform; - - ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0]; - ctx._transformStack = []; - - Object.defineProperty(ctx, 'mozCurrentTransform', { - get: function getCurrentTransform() { - return this._transformMatrix; - } - }); - - Object.defineProperty(ctx, 'mozCurrentTransformInverse', { - get: function getCurrentTransformInverse() { - // Calculation done using WolframAlpha: - // http://www.wolframalpha.com/input/? - // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - - var m = this._transformMatrix; - var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; - - var ad_bc = a * d - b * c; - var bc_ad = b * c - a * d; - - return [ - d / ad_bc, - b / bc_ad, - c / bc_ad, - a / ad_bc, - (d * e - c * f) / bc_ad, - (b * e - a * f) / ad_bc - ]; - } - }); - - ctx.save = function ctxSave() { - var old = this._transformMatrix; - this._transformStack.push(old); - this._transformMatrix = old.slice(0, 6); - - this._originalSave(); - }; - - ctx.restore = function ctxRestore() { - var prev = this._transformStack.pop(); - if (prev) { - this._transformMatrix = prev; - this._originalRestore(); - } - }; - - ctx.translate = function ctxTranslate(x, y) { - var m = this._transformMatrix; - m[4] = m[0] * x + m[2] * y + m[4]; - m[5] = m[1] * x + m[3] * y + m[5]; - - this._originalTranslate(x, y); - }; - - ctx.scale = function ctxScale(x, y) { - var m = this._transformMatrix; - m[0] = m[0] * x; - m[1] = m[1] * x; - m[2] = m[2] * y; - m[3] = m[3] * y; - - this._originalScale(x, y); - }; - - ctx.transform = function ctxTransform(a, b, c, d, e, f) { - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * a + m[2] * b, - m[1] * a + m[3] * b, - m[0] * c + m[2] * d, - m[1] * c + m[3] * d, - m[0] * e + m[2] * f + m[4], - m[1] * e + m[3] * f + m[5] - ]; - - ctx._originalTransform(a, b, c, d, e, f); - }; - - ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { - this._transformMatrix = [a, b, c, d, e, f]; - - ctx._originalSetTransform(a, b, c, d, e, f); - }; - - ctx.rotate = function ctxRotate(angle) { - var cosValue = Math.cos(angle); - var sinValue = Math.sin(angle); - - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * cosValue + m[2] * sinValue, - m[1] * cosValue + m[3] * sinValue, - m[0] * (-sinValue) + m[2] * cosValue, - m[1] * (-sinValue) + m[3] * cosValue, - m[4], - m[5] - ]; - - this._originalRotate(angle); - }; - } -} - -var CachedCanvases = (function CachedCanvasesClosure() { - function CachedCanvases() { - this.cache = Object.create(null); - } - CachedCanvases.prototype = { - getCanvas: function CachedCanvases_getCanvas(id, width, height, - trackTransform) { - var canvasEntry; - if (this.cache[id] !== undefined) { - canvasEntry = this.cache[id]; - canvasEntry.canvas.width = width; - canvasEntry.canvas.height = height; - // reset canvas transform for emulated mozCurrentTransform, if needed - canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); - } else { - var canvas = createScratchCanvas(width, height); - var ctx = canvas.getContext('2d'); - if (trackTransform) { - addContextCurrentTransform(ctx); - } - this.cache[id] = canvasEntry = {canvas: canvas, context: ctx}; - } - return canvasEntry; - }, - clear: function () { - for (var id in this.cache) { - var canvasEntry = this.cache[id]; - // Zeroing the width and height causes Firefox to release graphics - // resources immediately, which can greatly reduce memory consumption. - canvasEntry.canvas.width = 0; - canvasEntry.canvas.height = 0; - delete this.cache[id]; - } - } - }; - return CachedCanvases; -})(); - -function compileType3Glyph(imgData) { - var POINT_TO_PROCESS_LIMIT = 1000; - - var width = imgData.width, height = imgData.height; - var i, j, j0, width1 = width + 1; - var points = new Uint8Array(width1 * (height + 1)); - var POINT_TYPES = - new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); - - // decodes bit-packed mask data - var lineSize = (width + 7) & ~7, data0 = imgData.data; - var data = new Uint8Array(lineSize * height), pos = 0, ii; - for (i = 0, ii = data0.length; i < ii; i++) { - var mask = 128, elem = data0[i]; - while (mask > 0) { - data[pos++] = (elem & mask) ? 0 : 255; - mask >>= 1; - } - } - - // finding iteresting points: every point is located between mask pixels, - // so there will be points of the (width + 1)x(height + 1) grid. Every point - // will have flags assigned based on neighboring mask pixels: - // 4 | 8 - // --P-- - // 2 | 1 - // We are interested only in points with the flags: - // - outside corners: 1, 2, 4, 8; - // - inside corners: 7, 11, 13, 14; - // - and, intersections: 5, 10. - var count = 0; - pos = 0; - if (data[pos] !== 0) { - points[0] = 1; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j] = data[pos] ? 2 : 1; - ++count; - } - pos++; - } - if (data[pos] !== 0) { - points[j] = 2; - ++count; - } - for (i = 1; i < height; i++) { - pos = i * lineSize; - j0 = i * width1; - if (data[pos - lineSize] !== data[pos]) { - points[j0] = data[pos] ? 1 : 8; - ++count; - } - // 'sum' is the position of the current pixel configuration in the 'TYPES' - // array (in order 8-1-2-4, so we can use '>>2' to shift the column). - var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); - for (j = 1; j < width; j++) { - sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + - (data[pos - lineSize + 1] ? 8 : 0); - if (POINT_TYPES[sum]) { - points[j0 + j] = POINT_TYPES[sum]; - ++count; - } - pos++; - } - if (data[pos - lineSize] !== data[pos]) { - points[j0 + j] = data[pos] ? 2 : 4; - ++count; - } - - if (count > POINT_TO_PROCESS_LIMIT) { - return null; - } - } - - pos = lineSize * (height - 1); - j0 = i * width1; - if (data[pos] !== 0) { - points[j0] = 8; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j0 + j] = data[pos] ? 4 : 8; - ++count; - } - pos++; - } - if (data[pos] !== 0) { - points[j0 + j] = 4; - ++count; - } - if (count > POINT_TO_PROCESS_LIMIT) { - return null; - } - - // building outlines - var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); - var outlines = []; - for (i = 0; count && i <= height; i++) { - var p = i * width1; - var end = p + width; - while (p < end && !points[p]) { - p++; - } - if (p === end) { - continue; - } - var coords = [p % width1, i]; - - var type = points[p], p0 = p, pp; - do { - var step = steps[type]; - do { - p += step; - } while (!points[p]); - - pp = points[p]; - if (pp !== 5 && pp !== 10) { - // set new direction - type = pp; - // delete mark - points[p] = 0; - } else { // type is 5 or 10, ie, a crossing - // set new direction - type = pp & ((0x33 * type) >> 4); - // set new type for "future hit" - points[p] &= (type >> 2 | type << 2); - } - - coords.push(p % width1); - coords.push((p / width1) | 0); - --count; - } while (p0 !== p); - outlines.push(coords); - --i; - } - - var drawOutline = function(c) { - c.save(); - // the path shall be painted in [0..1]x[0..1] space - c.scale(1 / width, -1 / height); - c.translate(0, -height); - c.beginPath(); - for (var i = 0, ii = outlines.length; i < ii; i++) { - var o = outlines[i]; - c.moveTo(o[0], o[1]); - for (var j = 2, jj = o.length; j < jj; j += 2) { - c.lineTo(o[j], o[j+1]); - } - } - c.fill(); - c.beginPath(); - c.restore(); - }; - - return drawOutline; -} - -var CanvasExtraState = (function CanvasExtraStateClosure() { - function CanvasExtraState(old) { - // Are soft masks and alpha values shapes or opacities? - this.alphaIsShape = false; - this.fontSize = 0; - this.fontSizeScale = 1; - this.textMatrix = IDENTITY_MATRIX; - this.textMatrixScale = 1; - this.fontMatrix = FONT_IDENTITY_MATRIX; - this.leading = 0; - // Current point (in user coordinates) - this.x = 0; - this.y = 0; - // Start of text line (in text coordinates) - this.lineX = 0; - this.lineY = 0; - // Character and word spacing - this.charSpacing = 0; - this.wordSpacing = 0; - this.textHScale = 1; - this.textRenderingMode = TextRenderingMode.FILL; - this.textRise = 0; - // Default fore and background colors - this.fillColor = '#000000'; - this.strokeColor = '#000000'; - this.patternFill = false; - // Note: fill alpha applies to all non-stroking operations - this.fillAlpha = 1; - this.strokeAlpha = 1; - this.lineWidth = 1; - this.activeSMask = null; // nonclonable field (see the save method below) - - this.old = old; - } - - CanvasExtraState.prototype = { - clone: function CanvasExtraState_clone() { - return Object.create(this); - }, - setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { - this.x = x; - this.y = y; - } - }; - return CanvasExtraState; -})(); - -var CanvasGraphics = (function CanvasGraphicsClosure() { - // Defines the time the executeOperatorList is going to be executing - // before it stops and shedules a continue of execution. - var EXECUTION_TIME = 15; - // Defines the number of steps before checking the execution time - var EXECUTION_STEPS = 10; - - function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { - this.ctx = canvasCtx; - this.current = new CanvasExtraState(); - this.stateStack = []; - this.pendingClip = null; - this.pendingEOFill = false; - this.res = null; - this.xobjs = null; - this.commonObjs = commonObjs; - this.objs = objs; - this.imageLayer = imageLayer; - this.groupStack = []; - this.processingType3 = null; - // Patterns are painted relative to the initial page/form transform, see pdf - // spec 8.7.2 NOTE 1. - this.baseTransform = null; - this.baseTransformStack = []; - this.groupLevel = 0; - this.smaskStack = []; - this.smaskCounter = 0; - this.tempSMask = null; - this.cachedCanvases = new CachedCanvases(); - if (canvasCtx) { - // NOTE: if mozCurrentTransform is polyfilled, then the current state of - // the transformation must already be set in canvasCtx._transformMatrix. - addContextCurrentTransform(canvasCtx); - } - this.cachedGetSinglePixelWidth = null; - } - - function putBinaryImageData(ctx, imgData) { - if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { - ctx.putImageData(imgData, 0, 0); - return; - } - - // Put the image data to the canvas in chunks, rather than putting the - // whole image at once. This saves JS memory, because the ImageData object - // is smaller. It also possibly saves C++ memory within the implementation - // of putImageData(). (E.g. in Firefox we make two short-lived copies of - // the data passed to putImageData()). |n| shouldn't be too small, however, - // because too many putImageData() calls will slow things down. - // - // Note: as written, if the last chunk is partial, the putImageData() call - // will (conceptually) put pixels past the bounds of the canvas. But - // that's ok; any such pixels are ignored. - - var height = imgData.height, width = imgData.width; - var partialChunkHeight = height % FULL_CHUNK_HEIGHT; - var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; - var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; - - var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); - var srcPos = 0, destPos; - var src = imgData.data; - var dest = chunkImgData.data; - var i, j, thisChunkHeight, elemsInThisChunk; - - // There are multiple forms in which the pixel data can be passed, and - // imgData.kind tells us which one this is. - if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { - // Grayscale, 1 bit per pixel (i.e. black-and-white). - var srcLength = src.byteLength; - var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : - new Uint32ArrayView(dest); - var dest32DataLength = dest32.length; - var fullSrcDiff = (width + 7) >> 3; - var white = 0xFFFFFFFF; - var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? - 0xFF000000 : 0x000000FF; - for (i = 0; i < totalChunks; i++) { - thisChunkHeight = - (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; - destPos = 0; - for (j = 0; j < thisChunkHeight; j++) { - var srcDiff = srcLength - srcPos; - var k = 0; - var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; - var kEndUnrolled = kEnd & ~7; - var mask = 0; - var srcByte = 0; - for (; k < kEndUnrolled; k += 8) { - srcByte = src[srcPos++]; - dest32[destPos++] = (srcByte & 128) ? white : black; - dest32[destPos++] = (srcByte & 64) ? white : black; - dest32[destPos++] = (srcByte & 32) ? white : black; - dest32[destPos++] = (srcByte & 16) ? white : black; - dest32[destPos++] = (srcByte & 8) ? white : black; - dest32[destPos++] = (srcByte & 4) ? white : black; - dest32[destPos++] = (srcByte & 2) ? white : black; - dest32[destPos++] = (srcByte & 1) ? white : black; - } - for (; k < kEnd; k++) { - if (mask === 0) { - srcByte = src[srcPos++]; - mask = 128; - } - - dest32[destPos++] = (srcByte & mask) ? white : black; - mask >>= 1; - } - } - // We ran out of input. Make all remaining pixels transparent. - while (destPos < dest32DataLength) { - dest32[destPos++] = 0; - } - - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } else if (imgData.kind === ImageKind.RGBA_32BPP) { - // RGBA, 32-bits per pixel. - - j = 0; - elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4; - for (i = 0; i < fullChunks; i++) { - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - srcPos += elemsInThisChunk; - - ctx.putImageData(chunkImgData, 0, j); - j += FULL_CHUNK_HEIGHT; - } - if (i < totalChunks) { - elemsInThisChunk = width * partialChunkHeight * 4; - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - ctx.putImageData(chunkImgData, 0, j); - } - - } else if (imgData.kind === ImageKind.RGB_24BPP) { - // RGB, 24-bits per pixel. - thisChunkHeight = FULL_CHUNK_HEIGHT; - elemsInThisChunk = width * thisChunkHeight; - for (i = 0; i < totalChunks; i++) { - if (i >= fullChunks) { - thisChunkHeight = partialChunkHeight; - elemsInThisChunk = width * thisChunkHeight; - } - - destPos = 0; - for (j = elemsInThisChunk; j--;) { - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = 255; - } - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } else { - error('bad image kind: ' + imgData.kind); - } - } - - function putBinaryImageMask(ctx, imgData) { - var height = imgData.height, width = imgData.width; - var partialChunkHeight = height % FULL_CHUNK_HEIGHT; - var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; - var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; - - var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); - var srcPos = 0; - var src = imgData.data; - var dest = chunkImgData.data; - - for (var i = 0; i < totalChunks; i++) { - var thisChunkHeight = - (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; - - // Expand the mask so it can be used by the canvas. Any required - // inversion has already been handled. - var destPos = 3; // alpha component offset - for (var j = 0; j < thisChunkHeight; j++) { - var mask = 0; - for (var k = 0; k < width; k++) { - if (!mask) { - var elem = src[srcPos++]; - mask = 128; - } - dest[destPos] = (elem & mask) ? 0 : 255; - destPos += 4; - mask >>= 1; - } - } - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } - - function copyCtxState(sourceCtx, destCtx) { - var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', - 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', - 'globalCompositeOperation', 'font']; - for (var i = 0, ii = properties.length; i < ii; i++) { - var property = properties[i]; - if (sourceCtx[property] !== undefined) { - destCtx[property] = sourceCtx[property]; - } - } - if (sourceCtx.setLineDash !== undefined) { - destCtx.setLineDash(sourceCtx.getLineDash()); - destCtx.lineDashOffset = sourceCtx.lineDashOffset; - } else if (sourceCtx.mozDashOffset !== undefined) { - destCtx.mozDash = sourceCtx.mozDash; - destCtx.mozDashOffset = sourceCtx.mozDashOffset; - } - } - - function composeSMaskBackdrop(bytes, r0, g0, b0) { - var length = bytes.length; - for (var i = 3; i < length; i += 4) { - var alpha = bytes[i]; - if (alpha === 0) { - bytes[i - 3] = r0; - bytes[i - 2] = g0; - bytes[i - 1] = b0; - } else if (alpha < 255) { - var alpha_ = 255 - alpha; - bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; - bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; - bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; - } - } - } - - function composeSMaskAlpha(maskData, layerData, transferMap) { - var length = maskData.length; - var scale = 1 / 255; - for (var i = 3; i < length; i += 4) { - var alpha = transferMap ? transferMap[maskData[i]] : maskData[i]; - layerData[i] = (layerData[i] * alpha * scale) | 0; - } - } - - function composeSMaskLuminosity(maskData, layerData, transferMap) { - var length = maskData.length; - for (var i = 3; i < length; i += 4) { - var y = (maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 - (maskData[i - 2] * 152) + // * 0.59 .... - (maskData[i - 1] * 28); // * 0.11 .... - layerData[i] = transferMap ? - (layerData[i] * transferMap[y >> 8]) >> 8 : - (layerData[i] * y) >> 16; - } - } - - function genericComposeSMask(maskCtx, layerCtx, width, height, - subtype, backdrop, transferMap) { - var hasBackdrop = !!backdrop; - var r0 = hasBackdrop ? backdrop[0] : 0; - var g0 = hasBackdrop ? backdrop[1] : 0; - var b0 = hasBackdrop ? backdrop[2] : 0; - - var composeFn; - if (subtype === 'Luminosity') { - composeFn = composeSMaskLuminosity; - } else { - composeFn = composeSMaskAlpha; - } - - // processing image in chunks to save memory - var PIXELS_TO_PROCESS = 1048576; - var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); - for (var row = 0; row < height; row += chunkSize) { - var chunkHeight = Math.min(chunkSize, height - row); - var maskData = maskCtx.getImageData(0, row, width, chunkHeight); - var layerData = layerCtx.getImageData(0, row, width, chunkHeight); - - if (hasBackdrop) { - composeSMaskBackdrop(maskData.data, r0, g0, b0); - } - composeFn(maskData.data, layerData.data, transferMap); - - maskCtx.putImageData(layerData, 0, row); - } - } - - function composeSMask(ctx, smask, layerCtx) { - var mask = smask.canvas; - var maskCtx = smask.context; - - ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, - smask.offsetX, smask.offsetY); - - var backdrop = smask.backdrop || null; - if (!smask.transferMap && WebGLUtils.isEnabled) { - var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, - {subtype: smask.subtype, backdrop: backdrop}); - ctx.setTransform(1, 0, 0, 1, 0, 0); - ctx.drawImage(composed, smask.offsetX, smask.offsetY); - return; - } - genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, - smask.subtype, backdrop, smask.transferMap); - ctx.drawImage(mask, 0, 0); - } - - var LINE_CAP_STYLES = ['butt', 'round', 'square']; - var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; - var NORMAL_CLIP = {}; - var EO_CLIP = {}; - - CanvasGraphics.prototype = { - - beginDrawing: function CanvasGraphics_beginDrawing(transform, viewport, - transparency) { - // For pdfs that use blend modes we have to clear the canvas else certain - // blend modes can look wrong since we'd be blending with a white - // backdrop. The problem with a transparent backdrop though is we then - // don't get sub pixel anti aliasing on text, creating temporary - // transparent canvas when we have blend modes. - var width = this.ctx.canvas.width; - var height = this.ctx.canvas.height; - - this.ctx.save(); - this.ctx.fillStyle = 'rgb(255, 255, 255)'; - this.ctx.fillRect(0, 0, width, height); - this.ctx.restore(); - - if (transparency) { - var transparentCanvas = this.cachedCanvases.getCanvas( - 'transparent', width, height, true); - this.compositeCtx = this.ctx; - this.transparentCanvas = transparentCanvas.canvas; - this.ctx = transparentCanvas.context; - this.ctx.save(); - // The transform can be applied before rendering, transferring it to - // the new canvas. - this.ctx.transform.apply(this.ctx, - this.compositeCtx.mozCurrentTransform); - } - - this.ctx.save(); - if (transform) { - this.ctx.transform.apply(this.ctx, transform); - } - this.ctx.transform.apply(this.ctx, viewport.transform); - - this.baseTransform = this.ctx.mozCurrentTransform.slice(); - - if (this.imageLayer) { - this.imageLayer.beginLayout(); - } - }, - - executeOperatorList: function CanvasGraphics_executeOperatorList( - operatorList, - executionStartIdx, continueCallback, - stepper) { - var argsArray = operatorList.argsArray; - var fnArray = operatorList.fnArray; - var i = executionStartIdx || 0; - var argsArrayLen = argsArray.length; - - // Sometimes the OperatorList to execute is empty. - if (argsArrayLen === i) { - return i; - } - - var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && - typeof continueCallback === 'function'); - var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; - var steps = 0; - - var commonObjs = this.commonObjs; - var objs = this.objs; - var fnId; - - while (true) { - if (stepper !== undefined && i === stepper.nextBreakPoint) { - stepper.breakIt(i, continueCallback); - return i; - } - - fnId = fnArray[i]; - - if (fnId !== OPS.dependency) { - this[fnId].apply(this, argsArray[i]); - } else { - var deps = argsArray[i]; - for (var n = 0, nn = deps.length; n < nn; n++) { - var depObjId = deps[n]; - var common = depObjId[0] === 'g' && depObjId[1] === '_'; - var objsPool = common ? commonObjs : objs; - - // If the promise isn't resolved yet, add the continueCallback - // to the promise and bail out. - if (!objsPool.isResolved(depObjId)) { - objsPool.get(depObjId, continueCallback); - return i; - } - } - } - - i++; - - // If the entire operatorList was executed, stop as were done. - if (i === argsArrayLen) { - return i; - } - - // If the execution took longer then a certain amount of time and - // `continueCallback` is specified, interrupt the execution. - if (chunkOperations && ++steps > EXECUTION_STEPS) { - if (Date.now() > endTime) { - continueCallback(); - return i; - } - steps = 0; - } - - // If the operatorList isn't executed completely yet OR the execution - // time was short enough, do another execution round. - } - }, - - endDrawing: function CanvasGraphics_endDrawing() { - this.ctx.restore(); - - if (this.transparentCanvas) { - this.ctx = this.compositeCtx; - this.ctx.drawImage(this.transparentCanvas, 0, 0); - this.transparentCanvas = null; - } - - this.cachedCanvases.clear(); - WebGLUtils.clear(); - - if (this.imageLayer) { - this.imageLayer.endLayout(); - } - }, - - // Graphics state - setLineWidth: function CanvasGraphics_setLineWidth(width) { - this.current.lineWidth = width; - this.ctx.lineWidth = width; - }, - setLineCap: function CanvasGraphics_setLineCap(style) { - this.ctx.lineCap = LINE_CAP_STYLES[style]; - }, - setLineJoin: function CanvasGraphics_setLineJoin(style) { - this.ctx.lineJoin = LINE_JOIN_STYLES[style]; - }, - setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { - this.ctx.miterLimit = limit; - }, - setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { - var ctx = this.ctx; - if (ctx.setLineDash !== undefined) { - ctx.setLineDash(dashArray); - ctx.lineDashOffset = dashPhase; - } else { - ctx.mozDash = dashArray; - ctx.mozDashOffset = dashPhase; - } - }, - setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { - // Maybe if we one day fully support color spaces this will be important - // for now we can ignore. - // TODO set rendering intent? - }, - setFlatness: function CanvasGraphics_setFlatness(flatness) { - // There's no way to control this with canvas, but we can safely ignore. - // TODO set flatness? - }, - setGState: function CanvasGraphics_setGState(states) { - for (var i = 0, ii = states.length; i < ii; i++) { - var state = states[i]; - var key = state[0]; - var value = state[1]; - - switch (key) { - case 'LW': - this.setLineWidth(value); - break; - case 'LC': - this.setLineCap(value); - break; - case 'LJ': - this.setLineJoin(value); - break; - case 'ML': - this.setMiterLimit(value); - break; - case 'D': - this.setDash(value[0], value[1]); - break; - case 'RI': - this.setRenderingIntent(value); - break; - case 'FL': - this.setFlatness(value); - break; - case 'Font': - this.setFont(value[0], value[1]); - break; - case 'CA': - this.current.strokeAlpha = state[1]; - break; - case 'ca': - this.current.fillAlpha = state[1]; - this.ctx.globalAlpha = state[1]; - break; - case 'BM': - if (value && value.name && (value.name !== 'Normal')) { - var mode = value.name.replace(/([A-Z])/g, - function(c) { - return '-' + c.toLowerCase(); - } - ).substring(1); - this.ctx.globalCompositeOperation = mode; - if (this.ctx.globalCompositeOperation !== mode) { - warn('globalCompositeOperation "' + mode + - '" is not supported'); - } - } else { - this.ctx.globalCompositeOperation = 'source-over'; - } - break; - case 'SMask': - if (this.current.activeSMask) { - this.endSMaskGroup(); - } - this.current.activeSMask = value ? this.tempSMask : null; - if (this.current.activeSMask) { - this.beginSMaskGroup(); - } - this.tempSMask = null; - break; - } - } - }, - beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { - - var activeSMask = this.current.activeSMask; - var drawnWidth = activeSMask.canvas.width; - var drawnHeight = activeSMask.canvas.height; - var cacheId = 'smaskGroupAt' + this.groupLevel; - var scratchCanvas = this.cachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); - - var currentCtx = this.ctx; - var currentTransform = currentCtx.mozCurrentTransform; - this.ctx.save(); - - var groupCtx = scratchCanvas.context; - groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); - groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); - groupCtx.transform.apply(groupCtx, currentTransform); - - copyCtxState(currentCtx, groupCtx); - this.ctx = groupCtx; - this.setGState([ - ['BM', 'Normal'], - ['ca', 1], - ['CA', 1] - ]); - this.groupStack.push(currentCtx); - this.groupLevel++; - }, - endSMaskGroup: function CanvasGraphics_endSMaskGroup() { - var groupCtx = this.ctx; - this.groupLevel--; - this.ctx = this.groupStack.pop(); - - composeSMask(this.ctx, this.current.activeSMask, groupCtx); - this.ctx.restore(); - copyCtxState(groupCtx, this.ctx); - }, - save: function CanvasGraphics_save() { - this.ctx.save(); - var old = this.current; - this.stateStack.push(old); - this.current = old.clone(); - this.current.activeSMask = null; - }, - restore: function CanvasGraphics_restore() { - if (this.stateStack.length !== 0) { - if (this.current.activeSMask !== null) { - this.endSMaskGroup(); - } - - this.current = this.stateStack.pop(); - this.ctx.restore(); - - // Ensure that the clipping path is reset (fixes issue6413.pdf). - this.pendingClip = null; - - this.cachedGetSinglePixelWidth = null; - } - }, - transform: function CanvasGraphics_transform(a, b, c, d, e, f) { - this.ctx.transform(a, b, c, d, e, f); - - this.cachedGetSinglePixelWidth = null; - }, - - // Path - constructPath: function CanvasGraphics_constructPath(ops, args) { - var ctx = this.ctx; - var current = this.current; - var x = current.x, y = current.y; - for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { - switch (ops[i] | 0) { - case OPS.rectangle: - x = args[j++]; - y = args[j++]; - var width = args[j++]; - var height = args[j++]; - if (width === 0) { - width = this.getSinglePixelWidth(); - } - if (height === 0) { - height = this.getSinglePixelWidth(); - } - var xw = x + width; - var yh = y + height; - this.ctx.moveTo(x, y); - this.ctx.lineTo(xw, y); - this.ctx.lineTo(xw, yh); - this.ctx.lineTo(x, yh); - this.ctx.lineTo(x, y); - this.ctx.closePath(); - break; - case OPS.moveTo: - x = args[j++]; - y = args[j++]; - ctx.moveTo(x, y); - break; - case OPS.lineTo: - x = args[j++]; - y = args[j++]; - ctx.lineTo(x, y); - break; - case OPS.curveTo: - x = args[j + 4]; - y = args[j + 5]; - ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], - x, y); - j += 6; - break; - case OPS.curveTo2: - ctx.bezierCurveTo(x, y, args[j], args[j + 1], - args[j + 2], args[j + 3]); - x = args[j + 2]; - y = args[j + 3]; - j += 4; - break; - case OPS.curveTo3: - x = args[j + 2]; - y = args[j + 3]; - ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); - j += 4; - break; - case OPS.closePath: - ctx.closePath(); - break; - } - } - current.setCurrentPoint(x, y); - }, - closePath: function CanvasGraphics_closePath() { - this.ctx.closePath(); - }, - stroke: function CanvasGraphics_stroke(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; - var ctx = this.ctx; - var strokeColor = this.current.strokeColor; - // Prevent drawing too thin lines by enforcing a minimum line width. - ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR, - this.current.lineWidth); - // For stroke we want to temporarily change the global alpha to the - // stroking alpha. - ctx.globalAlpha = this.current.strokeAlpha; - if (strokeColor && strokeColor.hasOwnProperty('type') && - strokeColor.type === 'Pattern') { - // for patterns, we transform to pattern space, calculate - // the pattern, call stroke, and restore to user space - ctx.save(); - ctx.strokeStyle = strokeColor.getPattern(ctx, this); - ctx.stroke(); - ctx.restore(); - } else { - ctx.stroke(); - } - if (consumePath) { - this.consumePath(); - } - // Restore the global alpha to the fill alpha - ctx.globalAlpha = this.current.fillAlpha; - }, - closeStroke: function CanvasGraphics_closeStroke() { - this.closePath(); - this.stroke(); - }, - fill: function CanvasGraphics_fill(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; - var ctx = this.ctx; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - var needRestore = false; - - if (isPatternFill) { - ctx.save(); - if (this.baseTransform) { - ctx.setTransform.apply(ctx, this.baseTransform); - } - ctx.fillStyle = fillColor.getPattern(ctx, this); - needRestore = true; - } - - if (this.pendingEOFill) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.fill(); - ctx.mozFillRule = 'nonzero'; - } else { - ctx.fill('evenodd'); - } - this.pendingEOFill = false; - } else { - ctx.fill(); - } - - if (needRestore) { - ctx.restore(); - } - if (consumePath) { - this.consumePath(); - } - }, - eoFill: function CanvasGraphics_eoFill() { - this.pendingEOFill = true; - this.fill(); - }, - fillStroke: function CanvasGraphics_fillStroke() { - this.fill(false); - this.stroke(false); - - this.consumePath(); - }, - eoFillStroke: function CanvasGraphics_eoFillStroke() { - this.pendingEOFill = true; - this.fillStroke(); - }, - closeFillStroke: function CanvasGraphics_closeFillStroke() { - this.closePath(); - this.fillStroke(); - }, - closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { - this.pendingEOFill = true; - this.closePath(); - this.fillStroke(); - }, - endPath: function CanvasGraphics_endPath() { - this.consumePath(); - }, - - // Clipping - clip: function CanvasGraphics_clip() { - this.pendingClip = NORMAL_CLIP; - }, - eoClip: function CanvasGraphics_eoClip() { - this.pendingClip = EO_CLIP; - }, - - // Text - beginText: function CanvasGraphics_beginText() { - this.current.textMatrix = IDENTITY_MATRIX; - this.current.textMatrixScale = 1; - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - }, - endText: function CanvasGraphics_endText() { - var paths = this.pendingTextPaths; - var ctx = this.ctx; - if (paths === undefined) { - ctx.beginPath(); - return; - } - - ctx.save(); - ctx.beginPath(); - for (var i = 0; i < paths.length; i++) { - var path = paths[i]; - ctx.setTransform.apply(ctx, path.transform); - ctx.translate(path.x, path.y); - path.addToPath(ctx, path.fontSize); - } - ctx.restore(); - ctx.clip(); - ctx.beginPath(); - delete this.pendingTextPaths; - }, - setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { - this.current.charSpacing = spacing; - }, - setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { - this.current.wordSpacing = spacing; - }, - setHScale: function CanvasGraphics_setHScale(scale) { - this.current.textHScale = scale / 100; - }, - setLeading: function CanvasGraphics_setLeading(leading) { - this.current.leading = -leading; - }, - setFont: function CanvasGraphics_setFont(fontRefName, size) { - var fontObj = this.commonObjs.get(fontRefName); - var current = this.current; - - if (!fontObj) { - error('Can\'t find font for ' + fontRefName); - } - - current.fontMatrix = (fontObj.fontMatrix ? - fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - - // A valid matrix needs all main diagonal elements to be non-zero - // This also ensures we bypass FF bugzilla bug #719844. - if (current.fontMatrix[0] === 0 || - current.fontMatrix[3] === 0) { - warn('Invalid font matrix for font ' + fontRefName); - } - - // The spec for Tf (setFont) says that 'size' specifies the font 'scale', - // and in some docs this can be negative (inverted x-y axes). - if (size < 0) { - size = -size; - current.fontDirection = -1; - } else { - current.fontDirection = 1; - } - - this.current.font = fontObj; - this.current.fontSize = size; - - if (fontObj.isType3Font) { - return; // we don't need ctx.font for Type3 fonts - } - - var name = fontObj.loadedName || 'sans-serif'; - var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - - var italic = fontObj.italic ? 'italic' : 'normal'; - var typeface = '"' + name + '", ' + fontObj.fallbackName; - - // Some font backends cannot handle fonts below certain size. - // Keeping the font at minimal size and using the fontSizeScale to change - // the current transformation matrix before the fillText/strokeText. - // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 - var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE : - size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size; - this.current.fontSizeScale = size / browserFontSize; - - var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; - this.ctx.font = rule; - }, - setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { - this.current.textRenderingMode = mode; - }, - setTextRise: function CanvasGraphics_setTextRise(rise) { - this.current.textRise = rise; - }, - moveText: function CanvasGraphics_moveText(x, y) { - this.current.x = this.current.lineX += x; - this.current.y = this.current.lineY += y; - }, - setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { - this.setLeading(-y); - this.moveText(x, y); - }, - setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { - this.current.textMatrix = [a, b, c, d, e, f]; - this.current.textMatrixScale = Math.sqrt(a * a + b * b); - - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - }, - nextLine: function CanvasGraphics_nextLine() { - this.moveText(0, this.current.leading); - }, - - paintChar: function CanvasGraphics_paintChar(character, x, y) { - var ctx = this.ctx; - var current = this.current; - var font = current.font; - var textRenderingMode = current.textRenderingMode; - var fontSize = current.fontSize / current.fontSizeScale; - var fillStrokeMode = textRenderingMode & - TextRenderingMode.FILL_STROKE_MASK; - var isAddToPathSet = !!(textRenderingMode & - TextRenderingMode.ADD_TO_PATH_FLAG); - - var addToPath; - if (font.disableFontFace || isAddToPathSet) { - addToPath = font.getPathGenerator(this.commonObjs, character); - } - - if (font.disableFontFace) { - ctx.save(); - ctx.translate(x, y); - ctx.beginPath(); - addToPath(ctx, fontSize); - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fill(); - } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.stroke(); - } - ctx.restore(); - } else { - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fillText(character, x, y); - } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.strokeText(character, x, y); - } - } - - if (isAddToPathSet) { - var paths = this.pendingTextPaths || (this.pendingTextPaths = []); - paths.push({ - transform: ctx.mozCurrentTransform, - x: x, - y: y, - fontSize: fontSize, - addToPath: addToPath - }); - } - }, - - get isFontSubpixelAAEnabled() { - // Checks if anti-aliasing is enabled when scaled text is painted. - // On Windows GDI scaled fonts looks bad. - var ctx = document.createElement('canvas').getContext('2d'); - ctx.scale(1.5, 1); - ctx.fillText('I', 0, 10); - var data = ctx.getImageData(0, 0, 10, 10).data; - var enabled = false; - for (var i = 3; i < data.length; i += 4) { - if (data[i] > 0 && data[i] < 255) { - enabled = true; - break; - } - } - return shadow(this, 'isFontSubpixelAAEnabled', enabled); - }, - - showText: function CanvasGraphics_showText(glyphs) { - var current = this.current; - var font = current.font; - if (font.isType3Font) { - return this.showType3Text(glyphs); - } - - var fontSize = current.fontSize; - if (fontSize === 0) { - return; - } - - var ctx = this.ctx; - var fontSizeScale = current.fontSizeScale; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var fontDirection = current.fontDirection; - var textHScale = current.textHScale * fontDirection; - var glyphsLength = glyphs.length; - var vertical = font.vertical; - var spacingDir = vertical ? 1 : -1; - var defaultVMetrics = font.defaultVMetrics; - var widthAdvanceScale = fontSize * current.fontMatrix[0]; - - var simpleFillText = - current.textRenderingMode === TextRenderingMode.FILL && - !font.disableFontFace; - - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y + current.textRise); - - if (fontDirection > 0) { - ctx.scale(textHScale, -1); - } else { - ctx.scale(textHScale, 1); - } - - var lineWidth = current.lineWidth; - var scale = current.textMatrixScale; - if (scale === 0 || lineWidth === 0) { - var fillStrokeMode = current.textRenderingMode & - TextRenderingMode.FILL_STROKE_MASK; - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - this.cachedGetSinglePixelWidth = null; - lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR; - } - } else { - lineWidth /= scale; - } - - if (fontSizeScale !== 1.0) { - ctx.scale(fontSizeScale, fontSizeScale); - lineWidth /= fontSizeScale; - } - - ctx.lineWidth = lineWidth; - - var x = 0, i; - for (i = 0; i < glyphsLength; ++i) { - var glyph = glyphs[i]; - if (isNum(glyph)) { - x += spacingDir * glyph * fontSize / 1000; - continue; - } - - var restoreNeeded = false; - var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; - var character = glyph.fontChar; - var accent = glyph.accent; - var scaledX, scaledY, scaledAccentX, scaledAccentY; - var width = glyph.width; - if (vertical) { - var vmetric, vx, vy; - vmetric = glyph.vmetric || defaultVMetrics; - vx = glyph.vmetric ? vmetric[1] : width * 0.5; - vx = -vx * widthAdvanceScale; - vy = vmetric[2] * widthAdvanceScale; - - width = vmetric ? -vmetric[0] : width; - scaledX = vx / fontSizeScale; - scaledY = (x + vy) / fontSizeScale; - } else { - scaledX = x / fontSizeScale; - scaledY = 0; - } - - if (font.remeasure && width > 0) { - // Some standard fonts may not have the exact width: rescale per - // character if measured width is greater than expected glyph width - // and subpixel-aa is enabled, otherwise just center the glyph. - var measuredWidth = ctx.measureText(character).width * 1000 / - fontSize * fontSizeScale; - if (width < measuredWidth && this.isFontSubpixelAAEnabled) { - var characterScaleX = width / measuredWidth; - restoreNeeded = true; - ctx.save(); - ctx.scale(characterScaleX, 1); - scaledX /= characterScaleX; - } else if (width !== measuredWidth) { - scaledX += (width - measuredWidth) / 2000 * - fontSize / fontSizeScale; - } - } - - if (simpleFillText && !accent) { - // common case - ctx.fillText(character, scaledX, scaledY); - } else { - this.paintChar(character, scaledX, scaledY); - if (accent) { - scaledAccentX = scaledX + accent.offset.x / fontSizeScale; - scaledAccentY = scaledY - accent.offset.y / fontSizeScale; - this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); - } - } - - var charWidth = width * widthAdvanceScale + spacing * fontDirection; - x += charWidth; - - if (restoreNeeded) { - ctx.restore(); - } - } - if (vertical) { - current.y -= x * textHScale; - } else { - current.x += x * textHScale; - } - ctx.restore(); - }, - - showType3Text: function CanvasGraphics_showType3Text(glyphs) { - // Type3 fonts - each glyph is a "mini-PDF" - var ctx = this.ctx; - var current = this.current; - var font = current.font; - var fontSize = current.fontSize; - var fontDirection = current.fontDirection; - var spacingDir = font.vertical ? 1 : -1; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var textHScale = current.textHScale * fontDirection; - var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; - var glyphsLength = glyphs.length; - var isTextInvisible = - current.textRenderingMode === TextRenderingMode.INVISIBLE; - var i, glyph, width, spacingLength; - - if (isTextInvisible || fontSize === 0) { - return; - } - this.cachedGetSinglePixelWidth = null; - - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y); - - ctx.scale(textHScale, fontDirection); - - for (i = 0; i < glyphsLength; ++i) { - glyph = glyphs[i]; - if (isNum(glyph)) { - spacingLength = spacingDir * glyph * fontSize / 1000; - this.ctx.translate(spacingLength, 0); - current.x += spacingLength * textHScale; - continue; - } - - var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; - var operatorList = font.charProcOperatorList[glyph.operatorListId]; - if (!operatorList) { - warn('Type3 character \"' + glyph.operatorListId + - '\" is not available'); - continue; - } - this.processingType3 = glyph; - this.save(); - ctx.scale(fontSize, fontSize); - ctx.transform.apply(ctx, fontMatrix); - this.executeOperatorList(operatorList); - this.restore(); - - var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); - width = transformed[0] * fontSize + spacing; - - ctx.translate(width, 0); - current.x += width * textHScale; - } - ctx.restore(); - this.processingType3 = null; - }, - - // Type3 fonts - setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { - // We can safely ignore this since the width should be the same - // as the width in the Widths array. - }, - setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, - yWidth, - llx, - lly, - urx, - ury) { - // TODO According to the spec we're also suppose to ignore any operators - // that set color or include images while processing this type3 font. - this.ctx.rect(llx, lly, urx - llx, ury - lly); - this.clip(); - this.endPath(); - }, - - // Color - getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { - var pattern; - if (IR[0] === 'TilingPattern') { - var color = IR[1]; - var baseTransform = this.baseTransform || - this.ctx.mozCurrentTransform.slice(); - var self = this; - var canvasGraphicsFactory = { - createCanvasGraphics: function (ctx) { - return new CanvasGraphics(ctx, self.commonObjs, self.objs); - } - }; - pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, - baseTransform); - } else { - pattern = getShadingPatternFromIR(IR); - } - return pattern; - }, - setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { - this.current.strokeColor = this.getColorN_Pattern(arguments); - }, - setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { - this.current.fillColor = this.getColorN_Pattern(arguments); - this.current.patternFill = true; - }, - setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.ctx.strokeStyle = color; - this.current.strokeColor = color; - }, - setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.ctx.fillStyle = color; - this.current.fillColor = color; - this.current.patternFill = false; - }, - - shadingFill: function CanvasGraphics_shadingFill(patternIR) { - var ctx = this.ctx; - - this.save(); - var pattern = getShadingPatternFromIR(patternIR); - ctx.fillStyle = pattern.getPattern(ctx, this, true); - - var inv = ctx.mozCurrentTransformInverse; - if (inv) { - var canvas = ctx.canvas; - var width = canvas.width; - var height = canvas.height; - - var bl = Util.applyTransform([0, 0], inv); - var br = Util.applyTransform([0, height], inv); - var ul = Util.applyTransform([width, 0], inv); - var ur = Util.applyTransform([width, height], inv); - - var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); - var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); - var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); - var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); - - this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); - } else { - // HACK to draw the gradient onto an infinite rectangle. - // PDF gradients are drawn across the entire image while - // Canvas only allows gradients to be drawn in a rectangle - // The following bug should allow us to remove this. - // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 - - this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); - } - - this.restore(); - }, - - // Images - beginInlineImage: function CanvasGraphics_beginInlineImage() { - error('Should not call beginInlineImage'); - }, - beginImageData: function CanvasGraphics_beginImageData() { - error('Should not call beginImageData'); - }, - - paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, - bbox) { - this.save(); - this.baseTransformStack.push(this.baseTransform); - - if (isArray(matrix) && 6 === matrix.length) { - this.transform.apply(this, matrix); - } - - this.baseTransform = this.ctx.mozCurrentTransform; - - if (isArray(bbox) && 4 === bbox.length) { - var width = bbox[2] - bbox[0]; - var height = bbox[3] - bbox[1]; - this.ctx.rect(bbox[0], bbox[1], width, height); - this.clip(); - this.endPath(); - } - }, - - paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { - this.restore(); - this.baseTransform = this.baseTransformStack.pop(); - }, - - beginGroup: function CanvasGraphics_beginGroup(group) { - this.save(); - var currentCtx = this.ctx; - // TODO non-isolated groups - according to Rik at adobe non-isolated - // group results aren't usually that different and they even have tools - // that ignore this setting. Notes from Rik on implmenting: - // - When you encounter an transparency group, create a new canvas with - // the dimensions of the bbox - // - copy the content from the previous canvas to the new canvas - // - draw as usual - // - remove the backdrop alpha: - // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha - // value of your transparency group and 'alphaBackdrop' the alpha of the - // backdrop - // - remove background color: - // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) - if (!group.isolated) { - info('TODO: Support non-isolated groups.'); - } - - // TODO knockout - supposedly possible with the clever use of compositing - // modes. - if (group.knockout) { - warn('Knockout groups not supported.'); - } - - var currentTransform = currentCtx.mozCurrentTransform; - if (group.matrix) { - currentCtx.transform.apply(currentCtx, group.matrix); - } - assert(group.bbox, 'Bounding box is required.'); - - // Based on the current transform figure out how big the bounding box - // will actually be. - var bounds = Util.getAxialAlignedBoundingBox( - group.bbox, - currentCtx.mozCurrentTransform); - // Clip the bounding box to the current canvas. - var canvasBounds = [0, - 0, - currentCtx.canvas.width, - currentCtx.canvas.height]; - bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; - // Use ceil in case we're between sizes so we don't create canvas that is - // too small and make the canvas at least 1x1 pixels. - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); - var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); - var scaleX = 1, scaleY = 1; - if (drawnWidth > MAX_GROUP_SIZE) { - scaleX = drawnWidth / MAX_GROUP_SIZE; - drawnWidth = MAX_GROUP_SIZE; - } - if (drawnHeight > MAX_GROUP_SIZE) { - scaleY = drawnHeight / MAX_GROUP_SIZE; - drawnHeight = MAX_GROUP_SIZE; - } - - var cacheId = 'groupAt' + this.groupLevel; - if (group.smask) { - // Using two cache entries is case if masks are used one after another. - cacheId += '_smask_' + ((this.smaskCounter++) % 2); - } - var scratchCanvas = this.cachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); - var groupCtx = scratchCanvas.context; - - // Since we created a new canvas that is just the size of the bounding box - // we have to translate the group ctx. - groupCtx.scale(1 / scaleX, 1 / scaleY); - groupCtx.translate(-offsetX, -offsetY); - groupCtx.transform.apply(groupCtx, currentTransform); - - if (group.smask) { - // Saving state and cached mask to be used in setGState. - this.smaskStack.push({ - canvas: scratchCanvas.canvas, - context: groupCtx, - offsetX: offsetX, - offsetY: offsetY, - scaleX: scaleX, - scaleY: scaleY, - subtype: group.smask.subtype, - backdrop: group.smask.backdrop, - transferMap: group.smask.transferMap || null - }); - } else { - // Setup the current ctx so when the group is popped we draw it at the - // right location. - currentCtx.setTransform(1, 0, 0, 1, 0, 0); - currentCtx.translate(offsetX, offsetY); - currentCtx.scale(scaleX, scaleY); - } - // The transparency group inherits all off the current graphics state - // except the blend mode, soft mask, and alpha constants. - copyCtxState(currentCtx, groupCtx); - this.ctx = groupCtx; - this.setGState([ - ['BM', 'Normal'], - ['ca', 1], - ['CA', 1] - ]); - this.groupStack.push(currentCtx); - this.groupLevel++; - }, - - endGroup: function CanvasGraphics_endGroup(group) { - this.groupLevel--; - var groupCtx = this.ctx; - this.ctx = this.groupStack.pop(); - // Turn off image smoothing to avoid sub pixel interpolation which can - // look kind of blurry for some pdfs. - if (this.ctx.imageSmoothingEnabled !== undefined) { - this.ctx.imageSmoothingEnabled = false; - } else { - this.ctx.mozImageSmoothingEnabled = false; - } - if (group.smask) { - this.tempSMask = this.smaskStack.pop(); - } else { - this.ctx.drawImage(groupCtx.canvas, 0, 0); - } - this.restore(); - }, - - beginAnnotations: function CanvasGraphics_beginAnnotations() { - this.save(); - this.current = new CanvasExtraState(); - - if (this.baseTransform) { - this.ctx.setTransform.apply(this.ctx, this.baseTransform); - } - }, - - endAnnotations: function CanvasGraphics_endAnnotations() { - this.restore(); - }, - - beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, - matrix) { - this.save(); - - if (isArray(rect) && 4 === rect.length) { - var width = rect[2] - rect[0]; - var height = rect[3] - rect[1]; - this.ctx.rect(rect[0], rect[1], width, height); - this.clip(); - this.endPath(); - } - - this.transform.apply(this, transform); - this.transform.apply(this, matrix); - }, - - endAnnotation: function CanvasGraphics_endAnnotation() { - this.restore(); - }, - - paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { - var domImage = this.objs.get(objId); - if (!domImage) { - warn('Dependent image isn\'t ready yet'); - return; - } - - this.save(); - - var ctx = this.ctx; - // scale the image to the unit square - ctx.scale(1 / w, -1 / h); - - ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, - 0, -h, w, h); - if (this.imageLayer) { - var currentTransform = ctx.mozCurrentTransformInverse; - var position = this.getCanvasPosition(0, 0); - this.imageLayer.appendImage({ - objId: objId, - left: position[0], - top: position[1], - width: w / currentTransform[0], - height: h / currentTransform[3] - }); - } - this.restore(); - }, - - paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { - var ctx = this.ctx; - var width = img.width, height = img.height; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - - var glyph = this.processingType3; - - if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) { - if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { - glyph.compiled = - compileType3Glyph({data: img.data, width: width, height: height}); - } else { - glyph.compiled = null; - } - } - - if (glyph && glyph.compiled) { - glyph.compiled(ctx); - return; - } - - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - - putBinaryImageMask(maskCtx, img); - - maskCtx.globalCompositeOperation = 'source-in'; - - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); - - maskCtx.restore(); - - this.paintInlineImageXObject(maskCanvas.canvas); - }, - - paintImageMaskXObjectRepeat: - function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, - scaleY, positions) { - var width = imgData.width; - var height = imgData.height; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - - putBinaryImageMask(maskCtx, imgData); - - maskCtx.globalCompositeOperation = 'source-in'; - - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); - - maskCtx.restore(); - - var ctx = this.ctx; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - ctx.save(); - ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); - } - }, - - paintImageMaskXObjectGroup: - function CanvasGraphics_paintImageMaskXObjectGroup(images) { - var ctx = this.ctx; - - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - for (var i = 0, ii = images.length; i < ii; i++) { - var image = images[i]; - var width = image.width, height = image.height; - - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - - putBinaryImageMask(maskCtx, image); - - maskCtx.globalCompositeOperation = 'source-in'; - - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); - - maskCtx.restore(); - - ctx.save(); - ctx.transform.apply(ctx, image.transform); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); - } - }, - - paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; - } - - this.paintInlineImageXObject(imgData); - }, - - paintImageXObjectRepeat: - function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, - positions) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; - } - - var width = imgData.width; - var height = imgData.height; - var map = []; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - map.push({transform: [scaleX, 0, 0, scaleY, positions[i], - positions[i + 1]], x: 0, y: 0, w: width, h: height}); - } - this.paintInlineImageXObjectGroup(imgData, map); - }, - - paintInlineImageXObject: - function CanvasGraphics_paintInlineImageXObject(imgData) { - var width = imgData.width; - var height = imgData.height; - var ctx = this.ctx; - - this.save(); - // scale the image to the unit square - ctx.scale(1 / width, -1 / height); - - var currentTransform = ctx.mozCurrentTransformInverse; - var a = currentTransform[0], b = currentTransform[1]; - var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); - var c = currentTransform[2], d = currentTransform[3]; - var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); - - var imgToPaint, tmpCanvas; - // instanceof HTMLElement does not work in jsdom node.js module - if (imgData instanceof HTMLElement || !imgData.data) { - imgToPaint = imgData; - } else { - tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', - width, height); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); - imgToPaint = tmpCanvas.canvas; - } - - var paintWidth = width, paintHeight = height; - var tmpCanvasId = 'prescale1'; - // Vertial or horizontal scaling shall not be more than 2 to not loose the - // pixels during drawImage operation, painting on the temporary canvas(es) - // that are twice smaller in size - while ((widthScale > 2 && paintWidth > 1) || - (heightScale > 2 && paintHeight > 1)) { - var newWidth = paintWidth, newHeight = paintHeight; - if (widthScale > 2 && paintWidth > 1) { - newWidth = Math.ceil(paintWidth / 2); - widthScale /= paintWidth / newWidth; - } - if (heightScale > 2 && paintHeight > 1) { - newHeight = Math.ceil(paintHeight / 2); - heightScale /= paintHeight / newHeight; - } - tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, - newWidth, newHeight); - tmpCtx = tmpCanvas.context; - tmpCtx.clearRect(0, 0, newWidth, newHeight); - tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, 0, newWidth, newHeight); - imgToPaint = tmpCanvas.canvas; - paintWidth = newWidth; - paintHeight = newHeight; - tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; - } - ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, -height, width, height); - - if (this.imageLayer) { - var position = this.getCanvasPosition(0, -height); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: width / currentTransform[0], - height: height / currentTransform[3] - }); - } - this.restore(); - }, - - paintInlineImageXObjectGroup: - function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { - var ctx = this.ctx; - var w = imgData.width; - var h = imgData.height; - - var tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', w, h); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); - - for (var i = 0, ii = map.length; i < ii; i++) { - var entry = map[i]; - ctx.save(); - ctx.transform.apply(ctx, entry.transform); - ctx.scale(1, -1); - ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, - 0, -1, 1, 1); - if (this.imageLayer) { - var position = this.getCanvasPosition(entry.x, entry.y); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: w, - height: h - }); - } - ctx.restore(); - } - }, - - paintSolidColorImageMask: - function CanvasGraphics_paintSolidColorImageMask() { - this.ctx.fillRect(0, 0, 1, 1); - }, - - paintXObject: function CanvasGraphics_paintXObject() { - warn('Unsupported \'paintXObject\' command.'); - }, - - // Marked content - - markPoint: function CanvasGraphics_markPoint(tag) { - // TODO Marked content. - }, - markPointProps: function CanvasGraphics_markPointProps(tag, properties) { - // TODO Marked content. - }, - beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { - // TODO Marked content. - }, - beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( - tag, properties) { - // TODO Marked content. - }, - endMarkedContent: function CanvasGraphics_endMarkedContent() { - // TODO Marked content. - }, - - // Compatibility - - beginCompat: function CanvasGraphics_beginCompat() { - // TODO ignore undefined operators (should we do that anyway?) - }, - endCompat: function CanvasGraphics_endCompat() { - // TODO stop ignoring undefined operators - }, - - // Helper functions - - consumePath: function CanvasGraphics_consumePath() { - var ctx = this.ctx; - if (this.pendingClip) { - if (this.pendingClip === EO_CLIP) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.clip(); - ctx.mozFillRule = 'nonzero'; - } else { - ctx.clip('evenodd'); - } - } else { - ctx.clip(); - } - this.pendingClip = null; - } - ctx.beginPath(); - }, - getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { - if (this.cachedGetSinglePixelWidth === null) { - var inverse = this.ctx.mozCurrentTransformInverse; - // max of the current horizontal and vertical scale - this.cachedGetSinglePixelWidth = Math.sqrt(Math.max( - (inverse[0] * inverse[0] + inverse[1] * inverse[1]), - (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); - } - return this.cachedGetSinglePixelWidth; - }, - getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { - var transform = this.ctx.mozCurrentTransform; - return [ - transform[0] * x + transform[2] * y + transform[4], - transform[1] * x + transform[3] * y + transform[5] - ]; - } - }; - - for (var op in OPS) { - CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; - } - - return CanvasGraphics; -})(); - -exports.CanvasGraphics = CanvasGraphics; -exports.createScratchCanvas = createScratchCanvas; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas, - root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas, - sharedGlobal, amdRequire) { - -var InvalidPDFException = sharedUtil.InvalidPDFException; -var MessageHandler = sharedUtil.MessageHandler; -var MissingPDFException = sharedUtil.MissingPDFException; -var PasswordResponses = sharedUtil.PasswordResponses; -var PasswordException = sharedUtil.PasswordException; -var StatTimer = sharedUtil.StatTimer; -var UnexpectedResponseException = sharedUtil.UnexpectedResponseException; -var UnknownErrorException = sharedUtil.UnknownErrorException; -var Util = sharedUtil.Util; -var createPromiseCapability = sharedUtil.createPromiseCapability; -var combineUrl = sharedUtil.combineUrl; -var error = sharedUtil.error; -var deprecated = sharedUtil.deprecated; -var info = sharedUtil.info; -var isArrayBuffer = sharedUtil.isArrayBuffer; -var loadJpegStream = sharedUtil.loadJpegStream; -var stringToBytes = sharedUtil.stringToBytes; -var warn = sharedUtil.warn; -var FontFaceObject = displayFontLoader.FontFaceObject; -var FontLoader = displayFontLoader.FontLoader; -var CanvasGraphics = displayCanvas.CanvasGraphics; -var createScratchCanvas = displayCanvas.createScratchCanvas; -var PDFJS = sharedGlobal.PDFJS; -var globalScope = sharedGlobal.globalScope; - -var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536 - - -/** - * The maximum allowed image size in total pixels e.g. width * height. Images - * above this value will not be drawn. Use -1 for no limit. - * @var {number} - */ -PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ? - -1 : PDFJS.maxImageSize); - -/** - * The url of where the predefined Adobe CMaps are located. Include trailing - * slash. - * @var {string} - */ -PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); - -/** - * Specifies if CMaps are binary packed. - * @var {boolean} - */ -PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; - -/** - * By default fonts are converted to OpenType fonts and loaded via font face - * rules. If disabled, the font will be rendered using a built in font renderer - * that constructs the glyphs with primitive path commands. - * @var {boolean} - */ -PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ? - false : PDFJS.disableFontFace); - -/** - * Path for image resources, mainly for annotation icons. Include trailing - * slash. - * @var {string} - */ -PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? - '' : PDFJS.imageResourcesPath); - -/** - * Disable the web worker and run all code on the main thread. This will happen - * automatically if the browser doesn't support workers or sending typed arrays - * to workers. - * @var {boolean} - */ -PDFJS.disableWorker = (PDFJS.disableWorker === undefined ? - false : PDFJS.disableWorker); - -/** - * Path and filename of the worker file. Required when the worker is enabled in - * development mode. If unspecified in the production build, the worker will be - * loaded based on the location of the pdf.js file. It is recommended that - * the workerSrc is set in a custom application to prevent issues caused by - * third-party frameworks and libraries. - * @var {string} - */ -PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); - -/** - * Disable range request loading of PDF files. When enabled and if the server - * supports partial content requests then the PDF will be fetched in chunks. - * Enabled (false) by default. - * @var {boolean} - */ -PDFJS.disableRange = (PDFJS.disableRange === undefined ? - false : PDFJS.disableRange); - -/** - * Disable streaming of PDF file data. By default PDF.js attempts to load PDF - * in chunks. This default behavior can be disabled. - * @var {boolean} - */ -PDFJS.disableStream = (PDFJS.disableStream === undefined ? - false : PDFJS.disableStream); - -/** - * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js - * will automatically keep fetching more data even if it isn't needed to display - * the current page. This default behavior can be disabled. - * - * NOTE: It is also necessary to disable streaming, see above, - * in order for disabling of pre-fetching to work correctly. - * @var {boolean} - */ -PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? - false : PDFJS.disableAutoFetch); - -/** - * Enables special hooks for debugging PDF.js. - * @var {boolean} - */ -PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); - -/** - * Enables transfer usage in postMessage for ArrayBuffers. - * @var {boolean} - */ -PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? - true : PDFJS.postMessageTransfers); - -/** - * Disables URL.createObjectURL usage. - * @var {boolean} - */ -PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? - false : PDFJS.disableCreateObjectURL); - -/** - * Disables WebGL usage. - * @var {boolean} - */ -PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? - true : PDFJS.disableWebGL); - -/** - * Disables fullscreen support, and by extension Presentation Mode, - * in browsers which support the fullscreen API. - * @var {boolean} - */ -PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ? - false : PDFJS.disableFullscreen); - -/** - * Enables CSS only zooming. - * @var {boolean} - */ -PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? - false : PDFJS.useOnlyCssZoom); - -/** - * Controls the logging level. - * The constants from PDFJS.VERBOSITY_LEVELS should be used: - * - errors - * - warnings [default] - * - infos - * @var {number} - */ -PDFJS.verbosity = (PDFJS.verbosity === undefined ? - PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity); - -/** - * The maximum supported canvas size in total pixels e.g. width * height. - * The default value is 4096 * 4096. Use -1 for no limit. - * @var {number} - */ -PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ? - 16777216 : PDFJS.maxCanvasPixels); - -/** - * (Deprecated) Opens external links in a new window if enabled. - * The default behavior opens external links in the PDF.js window. - * - * NOTE: This property has been deprecated, please use - * `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead. - * @var {boolean} - */ -PDFJS.openExternalLinksInNewWindow = ( - PDFJS.openExternalLinksInNewWindow === undefined ? - false : PDFJS.openExternalLinksInNewWindow); - -/** - * Specifies the |target| attribute for external links. - * The constants from PDFJS.LinkTarget should be used: - * - NONE [default] - * - SELF - * - BLANK - * - PARENT - * - TOP - * @var {number} - */ -PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ? - PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget); - -/** - * Specifies the |rel| attribute for external links. Defaults to stripping - * the referrer. - * @var {string} - */ -PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ? - 'noreferrer' : PDFJS.externalLinkRel); - -/** - * Determines if we can eval strings as JS. Primarily used to improve - * performance for font rendering. - * @var {boolean} - */ -PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ? - true : PDFJS.isEvalSupported); - -/** - * Document initialization / loading parameters object. - * - * @typedef {Object} DocumentInitParameters - * @property {string} url - The URL of the PDF. - * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays - * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded, - * use atob() to convert it to a binary string first. - * @property {Object} httpHeaders - Basic authentication headers. - * @property {boolean} withCredentials - Indicates whether or not cross-site - * Access-Control requests should be made using credentials such as cookies - * or authorization headers. The default is false. - * @property {string} password - For decrypting password-protected PDFs. - * @property {TypedArray} initialData - A typed array with the first portion or - * all of the pdf data. Used by the extension since some data is already - * loaded before the switch to range requests. - * @property {number} length - The PDF file length. It's used for progress - * reports and range requests operations. - * @property {PDFDataRangeTransport} range - * @property {number} rangeChunkSize - Optional parameter to specify - * maximum number of bytes fetched per range request. The default value is - * 2^16 = 65536. - * @property {PDFWorker} worker - The worker that will be used for the loading - * and parsing of the PDF data. - */ - -/** - * @typedef {Object} PDFDocumentStats - * @property {Array} streamTypes - Used stream types in the document (an item - * is set to true if specific stream ID was used in the document). - * @property {Array} fontTypes - Used font type in the document (an item is set - * to true if specific font ID was used in the document). - */ - -/** - * This is the main entry point for loading a PDF and interacting with it. - * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR) - * is used, which means it must follow the same origin rules that any XHR does - * e.g. No cross domain requests without CORS. - * - * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src - * Can be a url to where a PDF is located, a typed array (Uint8Array) - * already populated with data or parameter object. - * - * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used - * if you want to manually serve range requests for data in the PDF. - * - * @param {function} passwordCallback (deprecated) It is used to request a - * password if wrong or no password was provided. The callback receives two - * parameters: function that needs to be called with new password and reason - * (see {PasswordResponses}). - * - * @param {function} progressCallback (deprecated) It is used to be able to - * monitor the loading progress of the PDF file (necessary to implement e.g. - * a loading bar). The callback receives an {Object} with the properties: - * {number} loaded and {number} total. - * - * @return {PDFDocumentLoadingTask} - */ -PDFJS.getDocument = function getDocument(src, - pdfDataRangeTransport, - passwordCallback, - progressCallback) { - var task = new PDFDocumentLoadingTask(); - - // Support of the obsolete arguments (for compatibility with API v1.0) - if (arguments.length > 1) { - deprecated('getDocument is called with pdfDataRangeTransport, ' + - 'passwordCallback or progressCallback argument'); - } - if (pdfDataRangeTransport) { - if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) { - // Not a PDFDataRangeTransport instance, trying to add missing properties. - pdfDataRangeTransport = Object.create(pdfDataRangeTransport); - pdfDataRangeTransport.length = src.length; - pdfDataRangeTransport.initialData = src.initialData; - if (!pdfDataRangeTransport.abort) { - pdfDataRangeTransport.abort = function () {}; - } - } - src = Object.create(src); - src.range = pdfDataRangeTransport; - } - task.onPassword = passwordCallback || null; - task.onProgress = progressCallback || null; - - var source; - if (typeof src === 'string') { - source = { url: src }; - } else if (isArrayBuffer(src)) { - source = { data: src }; - } else if (src instanceof PDFDataRangeTransport) { - source = { range: src }; - } else { - if (typeof src !== 'object') { - error('Invalid parameter in getDocument, need either Uint8Array, ' + - 'string or a parameter object'); - } - if (!src.url && !src.data && !src.range) { - error('Invalid parameter object: need either .data, .range or .url'); - } - - source = src; - } - - var params = {}; - var rangeTransport = null; - var worker = null; - for (var key in source) { - if (key === 'url' && typeof window !== 'undefined') { - // The full path is required in the 'url' field. - params[key] = combineUrl(window.location.href, source[key]); - continue; - } else if (key === 'range') { - rangeTransport = source[key]; - continue; - } else if (key === 'worker') { - worker = source[key]; - continue; - } else if (key === 'data' && !(source[key] instanceof Uint8Array)) { - // Converting string or array-like data to Uint8Array. - var pdfBytes = source[key]; - if (typeof pdfBytes === 'string') { - params[key] = stringToBytes(pdfBytes); - } else if (typeof pdfBytes === 'object' && pdfBytes !== null && - !isNaN(pdfBytes.length)) { - params[key] = new Uint8Array(pdfBytes); - } else if (isArrayBuffer(pdfBytes)) { - params[key] = new Uint8Array(pdfBytes); - } else { - error('Invalid PDF binary data: either typed array, string or ' + - 'array-like object is expected in the data property.'); - } - continue; - } - params[key] = source[key]; - } - - params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE; - - if (!worker) { - // Worker was not provided -- creating and owning our own. - worker = new PDFWorker(); - task._worker = worker; - } - var docId = task.docId; - worker.promise.then(function () { - if (task.destroyed) { - throw new Error('Loading aborted'); - } - return _fetchDocument(worker, params, rangeTransport, docId).then( - function (workerId) { - if (task.destroyed) { - throw new Error('Loading aborted'); - } - var messageHandler = new MessageHandler(docId, workerId, worker.port); - messageHandler.send('Ready', null); - var transport = new WorkerTransport(messageHandler, task, rangeTransport); - task._transport = transport; - }); - }, task._capability.reject); - - return task; -}; - -/** - * Starts fetching of specified PDF document/data. - * @param {PDFWorker} worker - * @param {Object} source - * @param {PDFDataRangeTransport} pdfDataRangeTransport - * @param {string} docId Unique document id, used as MessageHandler id. - * @returns {Promise} The promise, which is resolved when worker id of - * MessageHandler is known. - * @private - */ -function _fetchDocument(worker, source, pdfDataRangeTransport, docId) { - if (worker.destroyed) { - return Promise.reject(new Error('Worker was destroyed')); - } - - source.disableAutoFetch = PDFJS.disableAutoFetch; - source.disableStream = PDFJS.disableStream; - source.chunkedViewerLoading = !!pdfDataRangeTransport; - if (pdfDataRangeTransport) { - source.length = pdfDataRangeTransport.length; - source.initialData = pdfDataRangeTransport.initialData; - } - return worker.messageHandler.sendWithPromise('GetDocRequest', { - docId: docId, - source: source, - disableRange: PDFJS.disableRange, - maxImageSize: PDFJS.maxImageSize, - cMapUrl: PDFJS.cMapUrl, - cMapPacked: PDFJS.cMapPacked, - disableFontFace: PDFJS.disableFontFace, - disableCreateObjectURL: PDFJS.disableCreateObjectURL, - verbosity: PDFJS.verbosity - }).then(function (workerId) { - if (worker.destroyed) { - throw new Error('Worker was destroyed'); - } - return workerId; - }); -} - -/** - * PDF document loading operation. - * @class - * @alias PDFDocumentLoadingTask - */ -var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() { - var nextDocumentId = 0; - - /** @constructs PDFDocumentLoadingTask */ - function PDFDocumentLoadingTask() { - this._capability = createPromiseCapability(); - this._transport = null; - this._worker = null; - - /** - * Unique document loading task id -- used in MessageHandlers. - * @type {string} - */ - this.docId = 'd' + (nextDocumentId++); - - /** - * Shows if loading task is destroyed. - * @type {boolean} - */ - this.destroyed = false; - - /** - * Callback to request a password if wrong or no password was provided. - * The callback receives two parameters: function that needs to be called - * with new password and reason (see {PasswordResponses}). - */ - this.onPassword = null; - - /** - * Callback to be able to monitor the loading progress of the PDF file - * (necessary to implement e.g. a loading bar). The callback receives - * an {Object} with the properties: {number} loaded and {number} total. - */ - this.onProgress = null; - - /** - * Callback to when unsupported feature is used. The callback receives - * an {PDFJS.UNSUPPORTED_FEATURES} argument. - */ - this.onUnsupportedFeature = null; - } - - PDFDocumentLoadingTask.prototype = - /** @lends PDFDocumentLoadingTask.prototype */ { - /** - * @return {Promise} - */ - get promise() { - return this._capability.promise; - }, - - /** - * Aborts all network requests and destroys worker. - * @return {Promise} A promise that is resolved after destruction activity - * is completed. - */ - destroy: function () { - this.destroyed = true; - - var transportDestroyed = !this._transport ? Promise.resolve() : - this._transport.destroy(); - return transportDestroyed.then(function () { - this._transport = null; - if (this._worker) { - this._worker.destroy(); - this._worker = null; - } - }.bind(this)); - }, - - /** - * Registers callbacks to indicate the document loading completion. - * - * @param {function} onFulfilled The callback for the loading completion. - * @param {function} onRejected The callback for the loading failure. - * @return {Promise} A promise that is resolved after the onFulfilled or - * onRejected callback. - */ - then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) { - return this.promise.then.apply(this.promise, arguments); - } - }; - - return PDFDocumentLoadingTask; -})(); - -/** - * Abstract class to support range requests file loading. - * @class - * @alias PDFJS.PDFDataRangeTransport - * @param {number} length - * @param {Uint8Array} initialData - */ -var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() { - function PDFDataRangeTransport(length, initialData) { - this.length = length; - this.initialData = initialData; - - this._rangeListeners = []; - this._progressListeners = []; - this._progressiveReadListeners = []; - this._readyCapability = createPromiseCapability(); - } - PDFDataRangeTransport.prototype = - /** @lends PDFDataRangeTransport.prototype */ { - addRangeListener: - function PDFDataRangeTransport_addRangeListener(listener) { - this._rangeListeners.push(listener); - }, - - addProgressListener: - function PDFDataRangeTransport_addProgressListener(listener) { - this._progressListeners.push(listener); - }, - - addProgressiveReadListener: - function PDFDataRangeTransport_addProgressiveReadListener(listener) { - this._progressiveReadListeners.push(listener); - }, - - onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) { - var listeners = this._rangeListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](begin, chunk); - } - }, - - onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) { - this._readyCapability.promise.then(function () { - var listeners = this._progressListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](loaded); - } - }.bind(this)); - }, - - onDataProgressiveRead: - function PDFDataRangeTransport_onDataProgress(chunk) { - this._readyCapability.promise.then(function () { - var listeners = this._progressiveReadListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](chunk); - } - }.bind(this)); - }, - - transportReady: function PDFDataRangeTransport_transportReady() { - this._readyCapability.resolve(); - }, - - requestDataRange: - function PDFDataRangeTransport_requestDataRange(begin, end) { - throw new Error('Abstract method PDFDataRangeTransport.requestDataRange'); - }, - - abort: function PDFDataRangeTransport_abort() { - } - }; - return PDFDataRangeTransport; -})(); - -PDFJS.PDFDataRangeTransport = PDFDataRangeTransport; - -/** - * Proxy to a PDFDocument in the worker thread. Also, contains commonly used - * properties that can be read synchronously. - * @class - * @alias PDFDocumentProxy - */ -var PDFDocumentProxy = (function PDFDocumentProxyClosure() { - function PDFDocumentProxy(pdfInfo, transport, loadingTask) { - this.pdfInfo = pdfInfo; - this.transport = transport; - this.loadingTask = loadingTask; - } - PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ { - /** - * @return {number} Total number of pages the PDF contains. - */ - get numPages() { - return this.pdfInfo.numPages; - }, - /** - * @return {string} A unique ID to identify a PDF. Not guaranteed to be - * unique. - */ - get fingerprint() { - return this.pdfInfo.fingerprint; - }, - /** - * @param {number} pageNumber The page number to get. The first page is 1. - * @return {Promise} A promise that is resolved with a {@link PDFPageProxy} - * object. - */ - getPage: function PDFDocumentProxy_getPage(pageNumber) { - return this.transport.getPage(pageNumber); - }, - /** - * @param {{num: number, gen: number}} ref The page reference. Must have - * the 'num' and 'gen' properties. - * @return {Promise} A promise that is resolved with the page index that is - * associated with the reference. - */ - getPageIndex: function PDFDocumentProxy_getPageIndex(ref) { - return this.transport.getPageIndex(ref); - }, - /** - * @return {Promise} A promise that is resolved with a lookup table for - * mapping named destinations to reference numbers. - * - * This can be slow for large documents: use getDestination instead - */ - getDestinations: function PDFDocumentProxy_getDestinations() { - return this.transport.getDestinations(); - }, - /** - * @param {string} id The named destination to get. - * @return {Promise} A promise that is resolved with all information - * of the given named destination. - */ - getDestination: function PDFDocumentProxy_getDestination(id) { - return this.transport.getDestination(id); - }, - /** - * @return {Promise} A promise that is resolved with a lookup table for - * mapping named attachments to their content. - */ - getAttachments: function PDFDocumentProxy_getAttachments() { - return this.transport.getAttachments(); - }, - /** - * @return {Promise} A promise that is resolved with an array of all the - * JavaScript strings in the name tree. - */ - getJavaScript: function PDFDocumentProxy_getJavaScript() { - return this.transport.getJavaScript(); - }, - /** - * @return {Promise} A promise that is resolved with an {Array} that is a - * tree outline (if it has one) of the PDF. The tree is in the format of: - * [ - * { - * title: string, - * bold: boolean, - * italic: boolean, - * color: rgb array, - * dest: dest obj, - * items: array of more items like this - * }, - * ... - * ]. - */ - getOutline: function PDFDocumentProxy_getOutline() { - return this.transport.getOutline(); - }, - /** - * @return {Promise} A promise that is resolved with an {Object} that has - * info and metadata properties. Info is an {Object} filled with anything - * available in the information dictionary and similarly metadata is a - * {Metadata} object with information from the metadata section of the PDF. - */ - getMetadata: function PDFDocumentProxy_getMetadata() { - return this.transport.getMetadata(); - }, - /** - * @return {Promise} A promise that is resolved with a TypedArray that has - * the raw data from the PDF. - */ - getData: function PDFDocumentProxy_getData() { - return this.transport.getData(); - }, - /** - * @return {Promise} A promise that is resolved when the document's data - * is loaded. It is resolved with an {Object} that contains the length - * property that indicates size of the PDF data in bytes. - */ - getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() { - return this.transport.downloadInfoCapability.promise; - }, - /** - * @return {Promise} A promise this is resolved with current stats about - * document structures (see {@link PDFDocumentStats}). - */ - getStats: function PDFDocumentProxy_getStats() { - return this.transport.getStats(); - }, - /** - * Cleans up resources allocated by the document, e.g. created @font-face. - */ - cleanup: function PDFDocumentProxy_cleanup() { - this.transport.startCleanup(); - }, - /** - * Destroys current document instance and terminates worker. - */ - destroy: function PDFDocumentProxy_destroy() { - return this.loadingTask.destroy(); - } - }; - return PDFDocumentProxy; -})(); - -/** - * Page getTextContent parameters. - * - * @typedef {Object} getTextContentParameters - * @param {boolean} normalizeWhitespace - replaces all occurrences of - * whitespace with standard spaces (0x20). The default value is `false`. - */ - -/** - * Page text content. - * - * @typedef {Object} TextContent - * @property {array} items - array of {@link TextItem} - * @property {Object} styles - {@link TextStyles} objects, indexed by font - * name. - */ - -/** - * Page text content part. - * - * @typedef {Object} TextItem - * @property {string} str - text content. - * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'. - * @property {array} transform - transformation matrix. - * @property {number} width - width in device space. - * @property {number} height - height in device space. - * @property {string} fontName - font name used by pdf.js for converted font. - */ - -/** - * Text style. - * - * @typedef {Object} TextStyle - * @property {number} ascent - font ascent. - * @property {number} descent - font descent. - * @property {boolean} vertical - text is in vertical mode. - * @property {string} fontFamily - possible font family - */ - -/** - * Page annotation parameters. - * - * @typedef {Object} GetAnnotationsParameters - * @param {string} intent - Determines the annotations that will be fetched, - * can be either 'display' (viewable annotations) or 'print' - * (printable annotations). - * If the parameter is omitted, all annotations are fetched. - */ - -/** - * Page render parameters. - * - * @typedef {Object} RenderParameters - * @property {Object} canvasContext - A 2D context of a DOM Canvas object. - * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by - * calling of PDFPage.getViewport method. - * @property {string} intent - Rendering intent, can be 'display' or 'print' - * (default value is 'display'). - * @property {Array} transform - (optional) Additional transform, applied - * just before viewport transform. - * @property {Object} imageLayer - (optional) An object that has beginLayout, - * endLayout and appendImage functions. - * @property {function} continueCallback - (deprecated) A function that will be - * called each time the rendering is paused. To continue - * rendering call the function that is the first argument - * to the callback. - */ - -/** - * PDF page operator list. - * - * @typedef {Object} PDFOperatorList - * @property {Array} fnArray - Array containing the operator functions. - * @property {Array} argsArray - Array containing the arguments of the - * functions. - */ - -/** - * Proxy to a PDFPage in the worker thread. - * @class - * @alias PDFPageProxy - */ -var PDFPageProxy = (function PDFPageProxyClosure() { - function PDFPageProxy(pageIndex, pageInfo, transport) { - this.pageIndex = pageIndex; - this.pageInfo = pageInfo; - this.transport = transport; - this.stats = new StatTimer(); - this.stats.enabled = !!globalScope.PDFJS.enableStats; - this.commonObjs = transport.commonObjs; - this.objs = new PDFObjects(); - this.cleanupAfterRender = false; - this.pendingCleanup = false; - this.intentStates = {}; - this.destroyed = false; - } - PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ { - /** - * @return {number} Page number of the page. First page is 1. - */ - get pageNumber() { - return this.pageIndex + 1; - }, - /** - * @return {number} The number of degrees the page is rotated clockwise. - */ - get rotate() { - return this.pageInfo.rotate; - }, - /** - * @return {Object} The reference that points to this page. It has 'num' and - * 'gen' properties. - */ - get ref() { - return this.pageInfo.ref; - }, - /** - * @return {Array} An array of the visible portion of the PDF page in the - * user space units - [x1, y1, x2, y2]. - */ - get view() { - return this.pageInfo.view; - }, - /** - * @param {number} scale The desired scale of the viewport. - * @param {number} rotate Degrees to rotate the viewport. If omitted this - * defaults to the page rotation. - * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties - * along with transforms required for rendering. - */ - getViewport: function PDFPageProxy_getViewport(scale, rotate) { - if (arguments.length < 2) { - rotate = this.rotate; - } - return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0); - }, - /** - * @param {GetAnnotationsParameters} params - Annotation parameters. - * @return {Promise} A promise that is resolved with an {Array} of the - * annotation objects. - */ - getAnnotations: function PDFPageProxy_getAnnotations(params) { - var intent = (params && params.intent) || null; - - if (!this.annotationsPromise || this.annotationsIntent !== intent) { - this.annotationsPromise = this.transport.getAnnotations(this.pageIndex, - intent); - this.annotationsIntent = intent; - } - return this.annotationsPromise; - }, - /** - * Begins the process of rendering a page to the desired context. - * @param {RenderParameters} params Page render parameters. - * @return {RenderTask} An object that contains the promise, which - * is resolved when the page finishes rendering. - */ - render: function PDFPageProxy_render(params) { - var stats = this.stats; - stats.time('Overall'); - - // If there was a pending destroy cancel it so no cleanup happens during - // this call to render. - this.pendingCleanup = false; - - var renderingIntent = (params.intent === 'print' ? 'print' : 'display'); - - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; - } - var intentState = this.intentStates[renderingIntent]; - - // If there's no displayReadyCapability yet, then the operatorList - // was never requested before. Make the request and create the promise. - if (!intentState.displayReadyCapability) { - intentState.receivingOperatorList = true; - intentState.displayReadyCapability = createPromiseCapability(); - intentState.operatorList = { - fnArray: [], - argsArray: [], - lastChunk: false - }; - - this.stats.time('Page Request'); - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageNumber - 1, - intent: renderingIntent - }); - } - - var internalRenderTask = new InternalRenderTask(complete, params, - this.objs, - this.commonObjs, - intentState.operatorList, - this.pageNumber); - internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print'; - if (!intentState.renderTasks) { - intentState.renderTasks = []; - } - intentState.renderTasks.push(internalRenderTask); - var renderTask = internalRenderTask.task; - - // Obsolete parameter support - if (params.continueCallback) { - deprecated('render is used with continueCallback parameter'); - renderTask.onContinue = params.continueCallback; - } - - var self = this; - intentState.displayReadyCapability.promise.then( - function pageDisplayReadyPromise(transparency) { - if (self.pendingCleanup) { - complete(); - return; - } - stats.time('Rendering'); - internalRenderTask.initalizeGraphics(transparency); - internalRenderTask.operatorListChanged(); - }, - function pageDisplayReadPromiseError(reason) { - complete(reason); - } - ); - - function complete(error) { - var i = intentState.renderTasks.indexOf(internalRenderTask); - if (i >= 0) { - intentState.renderTasks.splice(i, 1); - } - - if (self.cleanupAfterRender) { - self.pendingCleanup = true; - } - self._tryCleanup(); - - if (error) { - internalRenderTask.capability.reject(error); - } else { - internalRenderTask.capability.resolve(); - } - stats.timeEnd('Rendering'); - stats.timeEnd('Overall'); - } - - return renderTask; - }, - - /** - * @return {Promise} A promise resolved with an {@link PDFOperatorList} - * object that represents page's operator list. - */ - getOperatorList: function PDFPageProxy_getOperatorList() { - function operatorListChanged() { - if (intentState.operatorList.lastChunk) { - intentState.opListReadCapability.resolve(intentState.operatorList); - } - } - - var renderingIntent = 'oplist'; - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; - } - var intentState = this.intentStates[renderingIntent]; - - if (!intentState.opListReadCapability) { - var opListTask = {}; - opListTask.operatorListChanged = operatorListChanged; - intentState.receivingOperatorList = true; - intentState.opListReadCapability = createPromiseCapability(); - intentState.renderTasks = []; - intentState.renderTasks.push(opListTask); - intentState.operatorList = { - fnArray: [], - argsArray: [], - lastChunk: false - }; - - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageIndex, - intent: renderingIntent - }); - } - return intentState.opListReadCapability.promise; - }, - - /** - * @param {getTextContentParameters} params - getTextContent parameters. - * @return {Promise} That is resolved a {@link TextContent} - * object that represent the page text content. - */ - getTextContent: function PDFPageProxy_getTextContent(params) { - var normalizeWhitespace = (params && params.normalizeWhitespace) || false; - - return this.transport.messageHandler.sendWithPromise('GetTextContent', { - pageIndex: this.pageNumber - 1, - normalizeWhitespace: normalizeWhitespace, - }); - }, - - /** - * Destroys page object. - */ - _destroy: function PDFPageProxy_destroy() { - this.destroyed = true; - this.transport.pageCache[this.pageIndex] = null; - - var waitOn = []; - Object.keys(this.intentStates).forEach(function(intent) { - var intentState = this.intentStates[intent]; - intentState.renderTasks.forEach(function(renderTask) { - var renderCompleted = renderTask.capability.promise. - catch(function () {}); // ignoring failures - waitOn.push(renderCompleted); - renderTask.cancel(); - }); - }, this); - this.objs.clear(); - this.annotationsPromise = null; - this.pendingCleanup = false; - return Promise.all(waitOn); - }, - - /** - * Cleans up resources allocated by the page. (deprecated) - */ - destroy: function() { - deprecated('page destroy method, use cleanup() instead'); - this.cleanup(); - }, - - /** - * Cleans up resources allocated by the page. - */ - cleanup: function PDFPageProxy_cleanup() { - this.pendingCleanup = true; - this._tryCleanup(); - }, - /** - * For internal use only. Attempts to clean up if rendering is in a state - * where that's possible. - * @ignore - */ - _tryCleanup: function PDFPageProxy_tryCleanup() { - if (!this.pendingCleanup || - Object.keys(this.intentStates).some(function(intent) { - var intentState = this.intentStates[intent]; - return (intentState.renderTasks.length !== 0 || - intentState.receivingOperatorList); - }, this)) { - return; - } - - Object.keys(this.intentStates).forEach(function(intent) { - delete this.intentStates[intent]; - }, this); - this.objs.clear(); - this.annotationsPromise = null; - this.pendingCleanup = false; - }, - /** - * For internal use only. - * @ignore - */ - _startRenderPage: function PDFPageProxy_startRenderPage(transparency, - intent) { - var intentState = this.intentStates[intent]; - // TODO Refactor RenderPageRequest to separate rendering - // and operator list logic - if (intentState.displayReadyCapability) { - intentState.displayReadyCapability.resolve(transparency); - } - }, - /** - * For internal use only. - * @ignore - */ - _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, - intent) { - var intentState = this.intentStates[intent]; - var i, ii; - // Add the new chunk to the current operator list. - for (i = 0, ii = operatorListChunk.length; i < ii; i++) { - intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]); - intentState.operatorList.argsArray.push( - operatorListChunk.argsArray[i]); - } - intentState.operatorList.lastChunk = operatorListChunk.lastChunk; - - // Notify all the rendering tasks there are more operators to be consumed. - for (i = 0; i < intentState.renderTasks.length; i++) { - intentState.renderTasks[i].operatorListChanged(); - } - - if (operatorListChunk.lastChunk) { - intentState.receivingOperatorList = false; - this._tryCleanup(); - } - } - }; - return PDFPageProxy; -})(); - -/** - * PDF.js web worker abstraction, it controls instantiation of PDF documents and - * WorkerTransport for them. If creation of a web worker is not possible, - * a "fake" worker will be used instead. - * @class - */ -var PDFWorker = (function PDFWorkerClosure() { - var nextFakeWorkerId = 0; - - // Loads worker code into main thread. - function setupFakeWorkerGlobal() { - if (!PDFJS.fakeWorkerFilesLoadedCapability) { - PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability(); - // In the developer build load worker_loader which in turn loads all the - // other files and resolves the promise. In production only the - // pdf.worker.js file is needed. - PDFJS.fakeWorkerFilesLoadedCapability.resolve(); - } - return PDFJS.fakeWorkerFilesLoadedCapability.promise; - } - - function PDFWorker(name) { - this.name = name; - this.destroyed = false; - - this._readyCapability = createPromiseCapability(); - this._port = null; - this._webWorker = null; - this._messageHandler = null; - this._initialize(); - } - - PDFWorker.prototype = /** @lends PDFWorker.prototype */ { - get promise() { - return this._readyCapability.promise; - }, - - get port() { - return this._port; - }, - - get messageHandler() { - return this._messageHandler; - }, - - _initialize: function PDFWorker_initialize() { - // If worker support isn't disabled explicit and the browser has worker - // support, create a new web worker and test if it/the browser fullfills - // all requirements to run parts of pdf.js in a web worker. - // Right now, the requirement is, that an Uint8Array is still an - // Uint8Array as it arrives on the worker. (Chrome added this with v.15.) - // Either workers are disabled, not supported or have thrown an exception. - // Thus, we fallback to a faked worker. - this._setupFakeWorker(); - }, - - _setupFakeWorker: function PDFWorker_setupFakeWorker() { - if (!globalScope.PDFJS.disableWorker) { - warn('Setting up fake worker.'); - globalScope.PDFJS.disableWorker = true; - } - - setupFakeWorkerGlobal().then(function () { - if (this.destroyed) { - this._readyCapability.reject(new Error('Worker was destroyed')); - return; - } - - // If we don't use a worker, just post/sendMessage to the main thread. - var port = { - _listeners: [], - postMessage: function (obj) { - var e = {data: obj}; - this._listeners.forEach(function (listener) { - listener.call(this, e); - }, this); - }, - addEventListener: function (name, listener) { - this._listeners.push(listener); - }, - removeEventListener: function (name, listener) { - var i = this._listeners.indexOf(listener); - this._listeners.splice(i, 1); - }, - terminate: function () {} - }; - this._port = port; - - // All fake workers use the same port, making id unique. - var id = 'fake' + (nextFakeWorkerId++); - - // If the main thread is our worker, setup the handling for the - // messages -- the main thread sends to it self. - var workerHandler = new MessageHandler(id + '_worker', id, port); - PDFJS.WorkerMessageHandler.setup(workerHandler, port); - - var messageHandler = new MessageHandler(id, id + '_worker', port); - this._messageHandler = messageHandler; - this._readyCapability.resolve(); - }.bind(this)); - }, - - /** - * Destroys the worker instance. - */ - destroy: function PDFWorker_destroy() { - this.destroyed = true; - if (this._webWorker) { - // We need to terminate only web worker created resource. - this._webWorker.terminate(); - this._webWorker = null; - } - this._port = null; - if (this._messageHandler) { - this._messageHandler.destroy(); - this._messageHandler = null; - } - } - }; - - return PDFWorker; -})(); -PDFJS.PDFWorker = PDFWorker; - -/** - * For internal use only. - * @ignore - */ -var WorkerTransport = (function WorkerTransportClosure() { - function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) { - this.messageHandler = messageHandler; - this.loadingTask = loadingTask; - this.pdfDataRangeTransport = pdfDataRangeTransport; - this.commonObjs = new PDFObjects(); - this.fontLoader = new FontLoader(loadingTask.docId); - - this.destroyed = false; - this.destroyCapability = null; - - this.pageCache = []; - this.pagePromises = []; - this.downloadInfoCapability = createPromiseCapability(); - - this.setupMessageHandler(); - } - WorkerTransport.prototype = { - destroy: function WorkerTransport_destroy() { - if (this.destroyCapability) { - return this.destroyCapability.promise; - } - - this.destroyed = true; - this.destroyCapability = createPromiseCapability(); - - var waitOn = []; - // We need to wait for all renderings to be completed, e.g. - // timeout/rAF can take a long time. - this.pageCache.forEach(function (page) { - if (page) { - waitOn.push(page._destroy()); - } - }); - this.pageCache = []; - this.pagePromises = []; - var self = this; - // We also need to wait for the worker to finish its long running tasks. - var terminated = this.messageHandler.sendWithPromise('Terminate', null); - waitOn.push(terminated); - Promise.all(waitOn).then(function () { - self.fontLoader.clear(); - if (self.pdfDataRangeTransport) { - self.pdfDataRangeTransport.abort(); - self.pdfDataRangeTransport = null; - } - if (self.messageHandler) { - self.messageHandler.destroy(); - self.messageHandler = null; - } - self.destroyCapability.resolve(); - }, this.destroyCapability.reject); - return this.destroyCapability.promise; - }, - - setupMessageHandler: - function WorkerTransport_setupMessageHandler() { - var messageHandler = this.messageHandler; - - function updatePassword(password) { - messageHandler.send('UpdatePassword', password); - } - - var pdfDataRangeTransport = this.pdfDataRangeTransport; - if (pdfDataRangeTransport) { - pdfDataRangeTransport.addRangeListener(function(begin, chunk) { - messageHandler.send('OnDataRange', { - begin: begin, - chunk: chunk - }); - }); - - pdfDataRangeTransport.addProgressListener(function(loaded) { - messageHandler.send('OnDataProgress', { - loaded: loaded - }); - }); - - pdfDataRangeTransport.addProgressiveReadListener(function(chunk) { - messageHandler.send('OnDataRange', { - chunk: chunk - }); - }); - - messageHandler.on('RequestDataRange', - function transportDataRange(data) { - pdfDataRangeTransport.requestDataRange(data.begin, data.end); - }, this); - } - - messageHandler.on('GetDoc', function transportDoc(data) { - var pdfInfo = data.pdfInfo; - this.numPages = data.pdfInfo.numPages; - var loadingTask = this.loadingTask; - var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask); - this.pdfDocument = pdfDocument; - loadingTask._capability.resolve(pdfDocument); - }, this); - - messageHandler.on('NeedPassword', - function transportNeedPassword(exception) { - var loadingTask = this.loadingTask; - if (loadingTask.onPassword) { - return loadingTask.onPassword(updatePassword, - PasswordResponses.NEED_PASSWORD); - } - loadingTask._capability.reject( - new PasswordException(exception.message, exception.code)); - }, this); - - messageHandler.on('IncorrectPassword', - function transportIncorrectPassword(exception) { - var loadingTask = this.loadingTask; - if (loadingTask.onPassword) { - return loadingTask.onPassword(updatePassword, - PasswordResponses.INCORRECT_PASSWORD); - } - loadingTask._capability.reject( - new PasswordException(exception.message, exception.code)); - }, this); - - messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) { - this.loadingTask._capability.reject( - new InvalidPDFException(exception.message)); - }, this); - - messageHandler.on('MissingPDF', function transportMissingPDF(exception) { - this.loadingTask._capability.reject( - new MissingPDFException(exception.message)); - }, this); - - messageHandler.on('UnexpectedResponse', - function transportUnexpectedResponse(exception) { - this.loadingTask._capability.reject( - new UnexpectedResponseException(exception.message, exception.status)); - }, this); - - messageHandler.on('UnknownError', - function transportUnknownError(exception) { - this.loadingTask._capability.reject( - new UnknownErrorException(exception.message, exception.details)); - }, this); - - messageHandler.on('DataLoaded', function transportPage(data) { - this.downloadInfoCapability.resolve(data); - }, this); - - messageHandler.on('PDFManagerReady', function transportPage(data) { - if (this.pdfDataRangeTransport) { - this.pdfDataRangeTransport.transportReady(); - } - }, this); - - messageHandler.on('StartRenderPage', function transportRender(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var page = this.pageCache[data.pageIndex]; - - page.stats.timeEnd('Page Request'); - page._startRenderPage(data.transparency, data.intent); - }, this); - - messageHandler.on('RenderPageChunk', function transportRender(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var page = this.pageCache[data.pageIndex]; - - page._renderPageChunk(data.operatorList, data.intent); - }, this); - - messageHandler.on('commonobj', function transportObj(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - - var id = data[0]; - var type = data[1]; - if (this.commonObjs.hasData(id)) { - return; - } - - switch (type) { - case 'Font': - var exportedData = data[2]; - - var font; - if ('error' in exportedData) { - var error = exportedData.error; - warn('Error during font loading: ' + error); - this.commonObjs.resolve(id, error); - break; - } else { - font = new FontFaceObject(exportedData); - } - - this.fontLoader.bind( - [font], - function fontReady(fontObjs) { - this.commonObjs.resolve(id, font); - }.bind(this) - ); - break; - case 'FontPath': - this.commonObjs.resolve(id, data[2]); - break; - default: - error('Got unknown common object type ' + type); - } - }, this); - - messageHandler.on('obj', function transportObj(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - - var id = data[0]; - var pageIndex = data[1]; - var type = data[2]; - var pageProxy = this.pageCache[pageIndex]; - var imageData; - if (pageProxy.objs.hasData(id)) { - return; - } - - switch (type) { - case 'JpegStream': - imageData = data[3]; - loadJpegStream(id, imageData, pageProxy.objs); - break; - case 'Image': - imageData = data[3]; - pageProxy.objs.resolve(id, imageData); - - // heuristics that will allow not to store large data - var MAX_IMAGE_SIZE_TO_STORE = 8000000; - if (imageData && 'data' in imageData && - imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) { - pageProxy.cleanupAfterRender = true; - } - break; - default: - error('Got unknown object type ' + type); - } - }, this); - - messageHandler.on('DocProgress', function transportDocProgress(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - - var loadingTask = this.loadingTask; - if (loadingTask.onProgress) { - loadingTask.onProgress({ - loaded: data.loaded, - total: data.total - }); - } - }, this); - - messageHandler.on('PageError', function transportError(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - - var page = this.pageCache[data.pageNum - 1]; - var intentState = page.intentStates[data.intent]; - if (intentState.displayReadyCapability) { - intentState.displayReadyCapability.reject(data.error); - } else { - error(data.error); - } - }, this); - - messageHandler.on('UnsupportedFeature', - function transportUnsupportedFeature(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var featureId = data.featureId; - var loadingTask = this.loadingTask; - if (loadingTask.onUnsupportedFeature) { - loadingTask.onUnsupportedFeature(featureId); - } - PDFJS.UnsupportedManager.notify(featureId); - }, this); - - messageHandler.on('JpegDecode', function(data) { - if (this.destroyed) { - return Promise.reject('Worker was terminated'); - } - - var imageUrl = data[0]; - var components = data[1]; - if (components !== 3 && components !== 1) { - return Promise.reject( - new Error('Only 3 components or 1 component can be returned')); - } - - return new Promise(function (resolve, reject) { - var img = new Image(); - img.onload = function () { - var width = img.width; - var height = img.height; - var size = width * height; - var rgbaLength = size * 4; - var buf = new Uint8Array(size * components); - var tmpCanvas = createScratchCanvas(width, height); - var tmpCtx = tmpCanvas.getContext('2d'); - tmpCtx.drawImage(img, 0, 0); - var data = tmpCtx.getImageData(0, 0, width, height).data; - var i, j; - - if (components === 3) { - for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) { - buf[j] = data[i]; - buf[j + 1] = data[i + 1]; - buf[j + 2] = data[i + 2]; - } - } else if (components === 1) { - for (i = 0, j = 0; i < rgbaLength; i += 4, j++) { - buf[j] = data[i]; - } - } - resolve({ data: buf, width: width, height: height}); - }; - img.onerror = function () { - reject(new Error('JpegDecode failed to load image')); - }; - img.src = imageUrl; - }); - }, this); - }, - - getData: function WorkerTransport_getData() { - return this.messageHandler.sendWithPromise('GetData', null); - }, - - getPage: function WorkerTransport_getPage(pageNumber, capability) { - if (pageNumber <= 0 || pageNumber > this.numPages || - (pageNumber|0) !== pageNumber) { - return Promise.reject(new Error('Invalid page request')); - } - - var pageIndex = pageNumber - 1; - if (pageIndex in this.pagePromises) { - return this.pagePromises[pageIndex]; - } - var promise = this.messageHandler.sendWithPromise('GetPage', { - pageIndex: pageIndex - }).then(function (pageInfo) { - if (this.destroyed) { - throw new Error('Transport destroyed'); - } - var page = new PDFPageProxy(pageIndex, pageInfo, this); - this.pageCache[pageIndex] = page; - return page; - }.bind(this)); - this.pagePromises[pageIndex] = promise; - return promise; - }, - - getPageIndex: function WorkerTransport_getPageIndexByRef(ref) { - return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }); - }, - - getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) { - return this.messageHandler.sendWithPromise('GetAnnotations', { - pageIndex: pageIndex, - intent: intent, - }); - }, - - getDestinations: function WorkerTransport_getDestinations() { - return this.messageHandler.sendWithPromise('GetDestinations', null); - }, - - getDestination: function WorkerTransport_getDestination(id) { - return this.messageHandler.sendWithPromise('GetDestination', { id: id }); - }, - - getAttachments: function WorkerTransport_getAttachments() { - return this.messageHandler.sendWithPromise('GetAttachments', null); - }, - - getJavaScript: function WorkerTransport_getJavaScript() { - return this.messageHandler.sendWithPromise('GetJavaScript', null); - }, - - getOutline: function WorkerTransport_getOutline() { - return this.messageHandler.sendWithPromise('GetOutline', null); - }, - - getMetadata: function WorkerTransport_getMetadata() { - return this.messageHandler.sendWithPromise('GetMetadata', null). - then(function transportMetadata(results) { - return { - info: results[0], - metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) - }; - }); - }, - - getStats: function WorkerTransport_getStats() { - return this.messageHandler.sendWithPromise('GetStats', null); - }, - - startCleanup: function WorkerTransport_startCleanup() { - this.messageHandler.sendWithPromise('Cleanup', null). - then(function endCleanup() { - for (var i = 0, ii = this.pageCache.length; i < ii; i++) { - var page = this.pageCache[i]; - if (page) { - page.cleanup(); - } - } - this.commonObjs.clear(); - this.fontLoader.clear(); - }.bind(this)); - } - }; - return WorkerTransport; - -})(); - -/** - * A PDF document and page is built of many objects. E.g. there are objects - * for fonts, images, rendering code and such. These objects might get processed - * inside of a worker. The `PDFObjects` implements some basic functions to - * manage these objects. - * @ignore - */ -var PDFObjects = (function PDFObjectsClosure() { - function PDFObjects() { - this.objs = {}; - } - - PDFObjects.prototype = { - /** - * Internal function. - * Ensures there is an object defined for `objId`. - */ - ensureObj: function PDFObjects_ensureObj(objId) { - if (this.objs[objId]) { - return this.objs[objId]; - } - - var obj = { - capability: createPromiseCapability(), - data: null, - resolved: false - }; - this.objs[objId] = obj; - - return obj; - }, - - /** - * If called *without* callback, this returns the data of `objId` but the - * object needs to be resolved. If it isn't, this function throws. - * - * If called *with* a callback, the callback is called with the data of the - * object once the object is resolved. That means, if you call this - * function and the object is already resolved, the callback gets called - * right away. - */ - get: function PDFObjects_get(objId, callback) { - // If there is a callback, then the get can be async and the object is - // not required to be resolved right now - if (callback) { - this.ensureObj(objId).capability.promise.then(callback); - return null; - } - - // If there isn't a callback, the user expects to get the resolved data - // directly. - var obj = this.objs[objId]; - - // If there isn't an object yet or the object isn't resolved, then the - // data isn't ready yet! - if (!obj || !obj.resolved) { - error('Requesting object that isn\'t resolved yet ' + objId); - } - - return obj.data; - }, - - /** - * Resolves the object `objId` with optional `data`. - */ - resolve: function PDFObjects_resolve(objId, data) { - var obj = this.ensureObj(objId); - - obj.resolved = true; - obj.data = data; - obj.capability.resolve(data); - }, - - isResolved: function PDFObjects_isResolved(objId) { - var objs = this.objs; - - if (!objs[objId]) { - return false; - } else { - return objs[objId].resolved; - } - }, - - hasData: function PDFObjects_hasData(objId) { - return this.isResolved(objId); - }, - - /** - * Returns the data of `objId` if object exists, null otherwise. - */ - getData: function PDFObjects_getData(objId) { - var objs = this.objs; - if (!objs[objId] || !objs[objId].resolved) { - return null; - } else { - return objs[objId].data; - } - }, - - clear: function PDFObjects_clear() { - this.objs = {}; - } - }; - return PDFObjects; -})(); - -/** - * Allows controlling of the rendering tasks. - * @class - * @alias RenderTask - */ -var RenderTask = (function RenderTaskClosure() { - function RenderTask(internalRenderTask) { - this._internalRenderTask = internalRenderTask; - - /** - * Callback for incremental rendering -- a function that will be called - * each time the rendering is paused. To continue rendering call the - * function that is the first argument to the callback. - * @type {function} - */ - this.onContinue = null; - } - - RenderTask.prototype = /** @lends RenderTask.prototype */ { - /** - * Promise for rendering task completion. - * @return {Promise} - */ - get promise() { - return this._internalRenderTask.capability.promise; - }, - - /** - * Cancels the rendering task. If the task is currently rendering it will - * not be cancelled until graphics pauses with a timeout. The promise that - * this object extends will resolved when cancelled. - */ - cancel: function RenderTask_cancel() { - this._internalRenderTask.cancel(); - }, - - /** - * Registers callbacks to indicate the rendering task completion. - * - * @param {function} onFulfilled The callback for the rendering completion. - * @param {function} onRejected The callback for the rendering failure. - * @return {Promise} A promise that is resolved after the onFulfilled or - * onRejected callback. - */ - then: function RenderTask_then(onFulfilled, onRejected) { - return this.promise.then.apply(this.promise, arguments); - } - }; - - return RenderTask; -})(); - -/** - * For internal use only. - * @ignore - */ -var InternalRenderTask = (function InternalRenderTaskClosure() { - - function InternalRenderTask(callback, params, objs, commonObjs, operatorList, - pageNumber) { - this.callback = callback; - this.params = params; - this.objs = objs; - this.commonObjs = commonObjs; - this.operatorListIdx = null; - this.operatorList = operatorList; - this.pageNumber = pageNumber; - this.running = false; - this.graphicsReadyCallback = null; - this.graphicsReady = false; - this.useRequestAnimationFrame = false; - this.cancelled = false; - this.capability = createPromiseCapability(); - this.task = new RenderTask(this); - // caching this-bound methods - this._continueBound = this._continue.bind(this); - this._scheduleNextBound = this._scheduleNext.bind(this); - this._nextBound = this._next.bind(this); - } - - InternalRenderTask.prototype = { - - initalizeGraphics: - function InternalRenderTask_initalizeGraphics(transparency) { - - if (this.cancelled) { - return; - } - if (PDFJS.pdfBug && 'StepperManager' in globalScope && - globalScope.StepperManager.enabled) { - this.stepper = globalScope.StepperManager.create(this.pageNumber - 1); - this.stepper.init(this.operatorList); - this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint(); - } - - var params = this.params; - this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, - this.objs, params.imageLayer); - - this.gfx.beginDrawing(params.transform, params.viewport, transparency); - this.operatorListIdx = 0; - this.graphicsReady = true; - if (this.graphicsReadyCallback) { - this.graphicsReadyCallback(); - } - }, - - cancel: function InternalRenderTask_cancel() { - this.running = false; - this.cancelled = true; - this.callback('cancelled'); - }, - - operatorListChanged: function InternalRenderTask_operatorListChanged() { - if (!this.graphicsReady) { - if (!this.graphicsReadyCallback) { - this.graphicsReadyCallback = this._continueBound; - } - return; - } - - if (this.stepper) { - this.stepper.updateOperatorList(this.operatorList); - } - - if (this.running) { - return; - } - this._continue(); - }, - - _continue: function InternalRenderTask__continue() { - this.running = true; - if (this.cancelled) { - return; - } - if (this.task.onContinue) { - this.task.onContinue.call(this.task, this._scheduleNextBound); - } else { - this._scheduleNext(); - } - }, - - _scheduleNext: function InternalRenderTask__scheduleNext() { - if (this.useRequestAnimationFrame) { - window.requestAnimationFrame(this._nextBound); - } else { - Promise.resolve(undefined).then(this._nextBound); - } - }, - - _next: function InternalRenderTask__next() { - if (this.cancelled) { - return; - } - this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, - this.operatorListIdx, - this._continueBound, - this.stepper); - if (this.operatorListIdx === this.operatorList.argsArray.length) { - this.running = false; - if (this.operatorList.lastChunk) { - this.gfx.endDrawing(); - this.callback(); - } - } - } - - }; - - return InternalRenderTask; -})(); - -/** - * (Deprecated) Global observer of unsupported feature usages. Use - * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance. - */ -PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() { - var listeners = []; - return { - listen: function (cb) { - deprecated('Global UnsupportedManager.listen is used: ' + - ' use PDFDocumentLoadingTask.onUnsupportedFeature instead'); - listeners.push(cb); - }, - notify: function (featureId) { - for (var i = 0, ii = listeners.length; i < ii; i++) { - listeners[i](featureId); - } - } - }; -})(); - -exports.getDocument = PDFJS.getDocument; -exports.PDFDataRangeTransport = PDFDataRangeTransport; -exports.PDFDocumentProxy = PDFDocumentProxy; -exports.PDFPageProxy = PDFPageProxy; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplaySVG = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { - -var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; -var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; -var ImageKind = sharedUtil.ImageKind; -var OPS = sharedUtil.OPS; -var Util = sharedUtil.Util; -var isNum = sharedUtil.isNum; -var isArray = sharedUtil.isArray; -var warn = sharedUtil.warn; - -var SVG_DEFAULTS = { - fontStyle: 'normal', - fontWeight: 'normal', - fillColor: '#000000' -}; - -var convertImgDataToPng = (function convertImgDataToPngClosure() { - var PNG_HEADER = - new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]); - - var CHUNK_WRAPPER_SIZE = 12; - - var crcTable = new Int32Array(256); - for (var i = 0; i < 256; i++) { - var c = i; - for (var h = 0; h < 8; h++) { - if (c & 1) { - c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff); - } else { - c = (c >> 1) & 0x7fffffff; - } - } - crcTable[i] = c; - } - - function crc32(data, start, end) { - var crc = -1; - for (var i = start; i < end; i++) { - var a = (crc ^ data[i]) & 0xff; - var b = crcTable[a]; - crc = (crc >>> 8) ^ b; - } - return crc ^ -1; - } - - function writePngChunk(type, body, data, offset) { - var p = offset; - var len = body.length; - - data[p] = len >> 24 & 0xff; - data[p + 1] = len >> 16 & 0xff; - data[p + 2] = len >> 8 & 0xff; - data[p + 3] = len & 0xff; - p += 4; - - data[p] = type.charCodeAt(0) & 0xff; - data[p + 1] = type.charCodeAt(1) & 0xff; - data[p + 2] = type.charCodeAt(2) & 0xff; - data[p + 3] = type.charCodeAt(3) & 0xff; - p += 4; - - data.set(body, p); - p += body.length; - - var crc = crc32(data, offset + 4, p); - - data[p] = crc >> 24 & 0xff; - data[p + 1] = crc >> 16 & 0xff; - data[p + 2] = crc >> 8 & 0xff; - data[p + 3] = crc & 0xff; - } - - function adler32(data, start, end) { - var a = 1; - var b = 0; - for (var i = start; i < end; ++i) { - a = (a + (data[i] & 0xff)) % 65521; - b = (b + a) % 65521; - } - return (b << 16) | a; - } - - function encode(imgData, kind) { - var width = imgData.width; - var height = imgData.height; - var bitDepth, colorType, lineSize; - var bytes = imgData.data; - - switch (kind) { - case ImageKind.GRAYSCALE_1BPP: - colorType = 0; - bitDepth = 1; - lineSize = (width + 7) >> 3; - break; - case ImageKind.RGB_24BPP: - colorType = 2; - bitDepth = 8; - lineSize = width * 3; - break; - case ImageKind.RGBA_32BPP: - colorType = 6; - bitDepth = 8; - lineSize = width * 4; - break; - default: - throw new Error('invalid format'); - } - - // prefix every row with predictor 0 - var literals = new Uint8Array((1 + lineSize) * height); - var offsetLiterals = 0, offsetBytes = 0; - var y, i; - for (y = 0; y < height; ++y) { - literals[offsetLiterals++] = 0; // no prediction - literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize), - offsetLiterals); - offsetBytes += lineSize; - offsetLiterals += lineSize; - } - - if (kind === ImageKind.GRAYSCALE_1BPP) { - // inverting for B/W - offsetLiterals = 0; - for (y = 0; y < height; y++) { - offsetLiterals++; // skipping predictor - for (i = 0; i < lineSize; i++) { - literals[offsetLiterals++] ^= 0xFF; - } - } - } - - var ihdr = new Uint8Array([ - width >> 24 & 0xff, - width >> 16 & 0xff, - width >> 8 & 0xff, - width & 0xff, - height >> 24 & 0xff, - height >> 16 & 0xff, - height >> 8 & 0xff, - height & 0xff, - bitDepth, // bit depth - colorType, // color type - 0x00, // compression method - 0x00, // filter method - 0x00 // interlace method - ]); - - var len = literals.length; - var maxBlockLength = 0xFFFF; - - var deflateBlocks = Math.ceil(len / maxBlockLength); - var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4); - var pi = 0; - idat[pi++] = 0x78; // compression method and flags - idat[pi++] = 0x9c; // flags - - var pos = 0; - while (len > maxBlockLength) { - // writing non-final DEFLATE blocks type 0 and length of 65535 - idat[pi++] = 0x00; - idat[pi++] = 0xff; - idat[pi++] = 0xff; - idat[pi++] = 0x00; - idat[pi++] = 0x00; - idat.set(literals.subarray(pos, pos + maxBlockLength), pi); - pi += maxBlockLength; - pos += maxBlockLength; - len -= maxBlockLength; - } - - // writing non-final DEFLATE blocks type 0 - idat[pi++] = 0x01; - idat[pi++] = len & 0xff; - idat[pi++] = len >> 8 & 0xff; - idat[pi++] = (~len & 0xffff) & 0xff; - idat[pi++] = (~len & 0xffff) >> 8 & 0xff; - idat.set(literals.subarray(pos), pi); - pi += literals.length - pos; - - var adler = adler32(literals, 0, literals.length); // checksum - idat[pi++] = adler >> 24 & 0xff; - idat[pi++] = adler >> 16 & 0xff; - idat[pi++] = adler >> 8 & 0xff; - idat[pi++] = adler & 0xff; - - // PNG will consists: header, IHDR+data, IDAT+data, and IEND. - var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) + - ihdr.length + idat.length; - var data = new Uint8Array(pngLength); - var offset = 0; - data.set(PNG_HEADER, offset); - offset += PNG_HEADER.length; - writePngChunk('IHDR', ihdr, data, offset); - offset += CHUNK_WRAPPER_SIZE + ihdr.length; - writePngChunk('IDATA', idat, data, offset); - offset += CHUNK_WRAPPER_SIZE + idat.length; - writePngChunk('IEND', new Uint8Array(0), data, offset); - - return PDFJS.createObjectURL(data, 'image/png'); - } - - return function convertImgDataToPng(imgData) { - var kind = (imgData.kind === undefined ? - ImageKind.GRAYSCALE_1BPP : imgData.kind); - return encode(imgData, kind); - }; -})(); - -var SVGExtraState = (function SVGExtraStateClosure() { - function SVGExtraState() { - this.fontSizeScale = 1; - this.fontWeight = SVG_DEFAULTS.fontWeight; - this.fontSize = 0; - - this.textMatrix = IDENTITY_MATRIX; - this.fontMatrix = FONT_IDENTITY_MATRIX; - this.leading = 0; - - // Current point (in user coordinates) - this.x = 0; - this.y = 0; - - // Start of text line (in text coordinates) - this.lineX = 0; - this.lineY = 0; - - // Character and word spacing - this.charSpacing = 0; - this.wordSpacing = 0; - this.textHScale = 1; - this.textRise = 0; - - // Default foreground and background colors - this.fillColor = SVG_DEFAULTS.fillColor; - this.strokeColor = '#000000'; - - this.fillAlpha = 1; - this.strokeAlpha = 1; - this.lineWidth = 1; - this.lineJoin = ''; - this.lineCap = ''; - this.miterLimit = 0; - - this.dashArray = []; - this.dashPhase = 0; - - this.dependencies = []; - - // Clipping - this.clipId = ''; - this.pendingClip = false; - - this.maskId = ''; - } - - SVGExtraState.prototype = { - clone: function SVGExtraState_clone() { - return Object.create(this); - }, - setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) { - this.x = x; - this.y = y; - } - }; - return SVGExtraState; -})(); - -var SVGGraphics = (function SVGGraphicsClosure() { - function createScratchSVG(width, height) { - var NS = 'http://www.w3.org/2000/svg'; - var svg = document.createElementNS(NS, 'svg:svg'); - svg.setAttributeNS(null, 'version', '1.1'); - svg.setAttributeNS(null, 'width', width + 'px'); - svg.setAttributeNS(null, 'height', height + 'px'); - svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height); - return svg; - } - - function opListToTree(opList) { - var opTree = []; - var tmp = []; - var opListLen = opList.length; - - for (var x = 0; x < opListLen; x++) { - if (opList[x].fn === 'save') { - opTree.push({'fnId': 92, 'fn': 'group', 'items': []}); - tmp.push(opTree); - opTree = opTree[opTree.length - 1].items; - continue; - } - - if(opList[x].fn === 'restore') { - opTree = tmp.pop(); - } else { - opTree.push(opList[x]); - } - } - return opTree; - } - - /** - * Formats float number. - * @param value {number} number to format. - * @returns {string} - */ - function pf(value) { - if (value === (value | 0)) { // integer number - return value.toString(); - } - var s = value.toFixed(10); - var i = s.length - 1; - if (s[i] !== '0') { - return s; - } - // removing trailing zeros - do { - i--; - } while (s[i] === '0'); - return s.substr(0, s[i] === '.' ? i : i + 1); - } - - /** - * Formats transform matrix. The standard rotation, scale and translate - * matrices are replaced by their shorter forms, and for identity matrix - * returns empty string to save the memory. - * @param m {Array} matrix to format. - * @returns {string} - */ - function pm(m) { - if (m[4] === 0 && m[5] === 0) { - if (m[1] === 0 && m[2] === 0) { - if (m[0] === 1 && m[3] === 1) { - return ''; - } - return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')'; - } - if (m[0] === m[3] && m[1] === -m[2]) { - var a = Math.acos(m[0]) * 180 / Math.PI; - return 'rotate(' + pf(a) + ')'; - } - } else { - if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) { - return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')'; - } - } - return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' + - pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')'; - } - - function SVGGraphics(commonObjs, objs) { - this.current = new SVGExtraState(); - this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix - this.transformStack = []; - this.extraStack = []; - this.commonObjs = commonObjs; - this.objs = objs; - this.pendingEOFill = false; - - this.embedFonts = false; - this.embeddedFonts = {}; - this.cssStyle = null; - } - - var NS = 'http://www.w3.org/2000/svg'; - var XML_NS = 'http://www.w3.org/XML/1998/namespace'; - var XLINK_NS = 'http://www.w3.org/1999/xlink'; - var LINE_CAP_STYLES = ['butt', 'round', 'square']; - var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; - var clipCount = 0; - var maskCount = 0; - - SVGGraphics.prototype = { - save: function SVGGraphics_save() { - this.transformStack.push(this.transformMatrix); - var old = this.current; - this.extraStack.push(old); - this.current = old.clone(); - }, - - restore: function SVGGraphics_restore() { - this.transformMatrix = this.transformStack.pop(); - this.current = this.extraStack.pop(); - - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.pgrp.appendChild(this.tgrp); - }, - - group: function SVGGraphics_group(items) { - this.save(); - this.executeOpTree(items); - this.restore(); - }, - - loadDependencies: function SVGGraphics_loadDependencies(operatorList) { - var fnArray = operatorList.fnArray; - var fnArrayLen = fnArray.length; - var argsArray = operatorList.argsArray; - - var self = this; - for (var i = 0; i < fnArrayLen; i++) { - if (OPS.dependency === fnArray[i]) { - var deps = argsArray[i]; - for (var n = 0, nn = deps.length; n < nn; n++) { - var obj = deps[n]; - var common = obj.substring(0, 2) === 'g_'; - var promise; - if (common) { - promise = new Promise(function(resolve) { - self.commonObjs.get(obj, resolve); - }); - } else { - promise = new Promise(function(resolve) { - self.objs.get(obj, resolve); - }); - } - this.current.dependencies.push(promise); - } - } - } - return Promise.all(this.current.dependencies); - }, - - transform: function SVGGraphics_transform(a, b, c, d, e, f) { - var transformMatrix = [a, b, c, d, e, f]; - this.transformMatrix = PDFJS.Util.transform(this.transformMatrix, - transformMatrix); - - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - }, - - getSVG: function SVGGraphics_getSVG(operatorList, viewport) { - this.svg = createScratchSVG(viewport.width, viewport.height); - this.viewport = viewport; - - return this.loadDependencies(operatorList).then(function () { - this.transformMatrix = IDENTITY_MATRIX; - this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group - this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform)); - this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.defs = document.createElementNS(NS, 'svg:defs'); - this.pgrp.appendChild(this.defs); - this.pgrp.appendChild(this.tgrp); - this.svg.appendChild(this.pgrp); - var opTree = this.convertOpList(operatorList); - this.executeOpTree(opTree); - return this.svg; - }.bind(this)); - }, - - convertOpList: function SVGGraphics_convertOpList(operatorList) { - var argsArray = operatorList.argsArray; - var fnArray = operatorList.fnArray; - var fnArrayLen = fnArray.length; - var REVOPS = []; - var opList = []; - - for (var op in OPS) { - REVOPS[OPS[op]] = op; - } - - for (var x = 0; x < fnArrayLen; x++) { - var fnId = fnArray[x]; - opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]}); - } - return opListToTree(opList); - }, - - executeOpTree: function SVGGraphics_executeOpTree(opTree) { - var opTreeLen = opTree.length; - for(var x = 0; x < opTreeLen; x++) { - var fn = opTree[x].fn; - var fnId = opTree[x].fnId; - var args = opTree[x].args; - - switch (fnId | 0) { - case OPS.beginText: - this.beginText(); - break; - case OPS.setLeading: - this.setLeading(args); - break; - case OPS.setLeadingMoveText: - this.setLeadingMoveText(args[0], args[1]); - break; - case OPS.setFont: - this.setFont(args); - break; - case OPS.showText: - this.showText(args[0]); - break; - case OPS.showSpacedText: - this.showText(args[0]); - break; - case OPS.endText: - this.endText(); - break; - case OPS.moveText: - this.moveText(args[0], args[1]); - break; - case OPS.setCharSpacing: - this.setCharSpacing(args[0]); - break; - case OPS.setWordSpacing: - this.setWordSpacing(args[0]); - break; - case OPS.setHScale: - this.setHScale(args[0]); - break; - case OPS.setTextMatrix: - this.setTextMatrix(args[0], args[1], args[2], - args[3], args[4], args[5]); - break; - case OPS.setLineWidth: - this.setLineWidth(args[0]); - break; - case OPS.setLineJoin: - this.setLineJoin(args[0]); - break; - case OPS.setLineCap: - this.setLineCap(args[0]); - break; - case OPS.setMiterLimit: - this.setMiterLimit(args[0]); - break; - case OPS.setFillRGBColor: - this.setFillRGBColor(args[0], args[1], args[2]); - break; - case OPS.setStrokeRGBColor: - this.setStrokeRGBColor(args[0], args[1], args[2]); - break; - case OPS.setDash: - this.setDash(args[0], args[1]); - break; - case OPS.setGState: - this.setGState(args[0]); - break; - case OPS.fill: - this.fill(); - break; - case OPS.eoFill: - this.eoFill(); - break; - case OPS.stroke: - this.stroke(); - break; - case OPS.fillStroke: - this.fillStroke(); - break; - case OPS.eoFillStroke: - this.eoFillStroke(); - break; - case OPS.clip: - this.clip('nonzero'); - break; - case OPS.eoClip: - this.clip('evenodd'); - break; - case OPS.paintSolidColorImageMask: - this.paintSolidColorImageMask(); - break; - case OPS.paintJpegXObject: - this.paintJpegXObject(args[0], args[1], args[2]); - break; - case OPS.paintImageXObject: - this.paintImageXObject(args[0]); - break; - case OPS.paintInlineImageXObject: - this.paintInlineImageXObject(args[0]); - break; - case OPS.paintImageMaskXObject: - this.paintImageMaskXObject(args[0]); - break; - case OPS.paintFormXObjectBegin: - this.paintFormXObjectBegin(args[0], args[1]); - break; - case OPS.paintFormXObjectEnd: - this.paintFormXObjectEnd(); - break; - case OPS.closePath: - this.closePath(); - break; - case OPS.closeStroke: - this.closeStroke(); - break; - case OPS.closeFillStroke: - this.closeFillStroke(); - break; - case OPS.nextLine: - this.nextLine(); - break; - case OPS.transform: - this.transform(args[0], args[1], args[2], args[3], - args[4], args[5]); - break; - case OPS.constructPath: - this.constructPath(args[0], args[1]); - break; - case OPS.endPath: - this.endPath(); - break; - case 92: - this.group(opTree[x].items); - break; - default: - warn('Unimplemented method '+ fn); - break; - } - } - }, - - setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) { - this.current.wordSpacing = wordSpacing; - }, - - setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) { - this.current.charSpacing = charSpacing; - }, - - nextLine: function SVGGraphics_nextLine() { - this.moveText(0, this.current.leading); - }, - - setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) { - var current = this.current; - this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f]; - - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - - current.xcoords = []; - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - - current.txtElement = document.createElementNS(NS, 'svg:text'); - current.txtElement.appendChild(current.tspan); - }, - - beginText: function SVGGraphics_beginText() { - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - this.current.textMatrix = IDENTITY_MATRIX; - this.current.lineMatrix = IDENTITY_MATRIX; - this.current.tspan = document.createElementNS(NS, 'svg:tspan'); - this.current.txtElement = document.createElementNS(NS, 'svg:text'); - this.current.txtgrp = document.createElementNS(NS, 'svg:g'); - this.current.xcoords = []; - }, - - moveText: function SVGGraphics_moveText(x, y) { - var current = this.current; - this.current.x = this.current.lineX += x; - this.current.y = this.current.lineY += y; - - current.xcoords = []; - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - }, - - showText: function SVGGraphics_showText(glyphs) { - var current = this.current; - var font = current.font; - var fontSize = current.fontSize; - - if (fontSize === 0) { - return; - } - - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var fontDirection = current.fontDirection; - var textHScale = current.textHScale * fontDirection; - var glyphsLength = glyphs.length; - var vertical = font.vertical; - var widthAdvanceScale = fontSize * current.fontMatrix[0]; - - var x = 0, i; - for (i = 0; i < glyphsLength; ++i) { - var glyph = glyphs[i]; - if (glyph === null) { - // word break - x += fontDirection * wordSpacing; - continue; - } else if (isNum(glyph)) { - x += -glyph * fontSize * 0.001; - continue; - } - current.xcoords.push(current.x + x * textHScale); - - var width = glyph.width; - var character = glyph.fontChar; - var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; - x += charWidth; - - current.tspan.textContent += character; - } - if (vertical) { - current.y -= x * textHScale; - } else { - current.x += x * textHScale; - } - - current.tspan.setAttributeNS(null, 'x', - current.xcoords.map(pf).join(' ')); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - if (current.fontStyle !== SVG_DEFAULTS.fontStyle) { - current.tspan.setAttributeNS(null, 'font-style', current.fontStyle); - } - if (current.fontWeight !== SVG_DEFAULTS.fontWeight) { - current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight); - } - if (current.fillColor !== SVG_DEFAULTS.fillColor) { - current.tspan.setAttributeNS(null, 'fill', current.fillColor); - } - - current.txtElement.setAttributeNS(null, 'transform', - pm(current.textMatrix) + - ' scale(1, -1)' ); - current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve'); - current.txtElement.appendChild(current.tspan); - current.txtgrp.appendChild(current.txtElement); - - this.tgrp.appendChild(current.txtElement); - - }, - - setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) { - this.setLeading(-y); - this.moveText(x, y); - }, - - addFontStyle: function SVGGraphics_addFontStyle(fontObj) { - if (!this.cssStyle) { - this.cssStyle = document.createElementNS(NS, 'svg:style'); - this.cssStyle.setAttributeNS(null, 'type', 'text/css'); - this.defs.appendChild(this.cssStyle); - } - - var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype); - this.cssStyle.textContent += - '@font-face { font-family: "' + fontObj.loadedName + '";' + - ' src: url(' + url + '); }\n'; - }, - - setFont: function SVGGraphics_setFont(details) { - var current = this.current; - var fontObj = this.commonObjs.get(details[0]); - var size = details[1]; - this.current.font = fontObj; - - if (this.embedFonts && fontObj.data && - !this.embeddedFonts[fontObj.loadedName]) { - this.addFontStyle(fontObj); - this.embeddedFonts[fontObj.loadedName] = fontObj; - } - - current.fontMatrix = (fontObj.fontMatrix ? - fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - - var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - var italic = fontObj.italic ? 'italic' : 'normal'; - - if (size < 0) { - size = -size; - current.fontDirection = -1; - } else { - current.fontDirection = 1; - } - current.fontSize = size; - current.fontFamily = fontObj.loadedName; - current.fontWeight = bold; - current.fontStyle = italic; - - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - current.xcoords = []; - }, - - endText: function SVGGraphics_endText() { - if (this.current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - }, - - // Path properties - setLineWidth: function SVGGraphics_setLineWidth(width) { - this.current.lineWidth = width; - }, - setLineCap: function SVGGraphics_setLineCap(style) { - this.current.lineCap = LINE_CAP_STYLES[style]; - }, - setLineJoin: function SVGGraphics_setLineJoin(style) { - this.current.lineJoin = LINE_JOIN_STYLES[style]; - }, - setMiterLimit: function SVGGraphics_setMiterLimit(limit) { - this.current.miterLimit = limit; - }, - setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.current.strokeColor = color; - }, - setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.current.fillColor = color; - this.current.tspan = document.createElementNS(NS, 'svg:tspan'); - this.current.xcoords = []; - }, - setDash: function SVGGraphics_setDash(dashArray, dashPhase) { - this.current.dashArray = dashArray; - this.current.dashPhase = dashPhase; - }, - - constructPath: function SVGGraphics_constructPath(ops, args) { - var current = this.current; - var x = current.x, y = current.y; - current.path = document.createElementNS(NS, 'svg:path'); - var d = []; - var opLength = ops.length; - - for (var i = 0, j = 0; i < opLength; i++) { - switch (ops[i] | 0) { - case OPS.rectangle: - x = args[j++]; - y = args[j++]; - var width = args[j++]; - var height = args[j++]; - var xw = x + width; - var yh = y + height; - d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh), - 'L', pf(x), pf(yh), 'Z'); - break; - case OPS.moveTo: - x = args[j++]; - y = args[j++]; - d.push('M', pf(x), pf(y)); - break; - case OPS.lineTo: - x = args[j++]; - y = args[j++]; - d.push('L', pf(x) , pf(y)); - break; - case OPS.curveTo: - x = args[j + 4]; - y = args[j + 5]; - d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]), - pf(args[j + 3]), pf(x), pf(y)); - j += 6; - break; - case OPS.curveTo2: - x = args[j + 2]; - y = args[j + 3]; - d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]), - pf(args[j + 2]), pf(args[j + 3])); - j += 4; - break; - case OPS.curveTo3: - x = args[j + 2]; - y = args[j + 3]; - d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y), - pf(x), pf(y)); - j += 4; - break; - case OPS.closePath: - d.push('Z'); - break; - } - } - current.path.setAttributeNS(null, 'd', d.join(' ')); - current.path.setAttributeNS(null, 'stroke-miterlimit', - pf(current.miterLimit)); - current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap); - current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin); - current.path.setAttributeNS(null, 'stroke-width', - pf(current.lineWidth) + 'px'); - current.path.setAttributeNS(null, 'stroke-dasharray', - current.dashArray.map(pf).join(' ')); - current.path.setAttributeNS(null, 'stroke-dashoffset', - pf(current.dashPhase) + 'px'); - current.path.setAttributeNS(null, 'fill', 'none'); - - this.tgrp.appendChild(current.path); - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - // Saving a reference in current.element so that it can be addressed - // in 'fill' and 'stroke' - current.element = current.path; - current.setCurrentPoint(x, y); - }, - - endPath: function SVGGraphics_endPath() { - var current = this.current; - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - }, - - clip: function SVGGraphics_clip(type) { - var current = this.current; - // Add current path to clipping path - current.clipId = 'clippath' + clipCount; - clipCount++; - this.clippath = document.createElementNS(NS, 'svg:clipPath'); - this.clippath.setAttributeNS(null, 'id', current.clipId); - var clipElement = current.element.cloneNode(); - if (type === 'evenodd') { - clipElement.setAttributeNS(null, 'clip-rule', 'evenodd'); - } else { - clipElement.setAttributeNS(null, 'clip-rule', 'nonzero'); - } - this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.clippath.appendChild(clipElement); - this.defs.appendChild(this.clippath); - - // Create a new group with that attribute - current.pendingClip = true; - this.cgrp = document.createElementNS(NS, 'svg:g'); - this.cgrp.setAttributeNS(null, 'clip-path', - 'url(#' + current.clipId + ')'); - this.pgrp.appendChild(this.cgrp); - }, - - closePath: function SVGGraphics_closePath() { - var current = this.current; - var d = current.path.getAttributeNS(null, 'd'); - d += 'Z'; - current.path.setAttributeNS(null, 'd', d); - }, - - setLeading: function SVGGraphics_setLeading(leading) { - this.current.leading = -leading; - }, - - setTextRise: function SVGGraphics_setTextRise(textRise) { - this.current.textRise = textRise; - }, - - setHScale: function SVGGraphics_setHScale(scale) { - this.current.textHScale = scale / 100; - }, - - setGState: function SVGGraphics_setGState(states) { - for (var i = 0, ii = states.length; i < ii; i++) { - var state = states[i]; - var key = state[0]; - var value = state[1]; - - switch (key) { - case 'LW': - this.setLineWidth(value); - break; - case 'LC': - this.setLineCap(value); - break; - case 'LJ': - this.setLineJoin(value); - break; - case 'ML': - this.setMiterLimit(value); - break; - case 'D': - this.setDash(value[0], value[1]); - break; - case 'RI': - break; - case 'FL': - break; - case 'Font': - this.setFont(value); - break; - case 'CA': - break; - case 'ca': - break; - case 'BM': - break; - case 'SMask': - break; - } - } - }, - - fill: function SVGGraphics_fill() { - var current = this.current; - current.element.setAttributeNS(null, 'fill', current.fillColor); - }, - - stroke: function SVGGraphics_stroke() { - var current = this.current; - current.element.setAttributeNS(null, 'stroke', current.strokeColor); - current.element.setAttributeNS(null, 'fill', 'none'); - }, - - eoFill: function SVGGraphics_eoFill() { - var current = this.current; - current.element.setAttributeNS(null, 'fill', current.fillColor); - current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); - }, - - fillStroke: function SVGGraphics_fillStroke() { - // Order is important since stroke wants fill to be none. - // First stroke, then if fill needed, it will be overwritten. - this.stroke(); - this.fill(); - }, - - eoFillStroke: function SVGGraphics_eoFillStroke() { - this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); - this.fillStroke(); - }, - - closeStroke: function SVGGraphics_closeStroke() { - this.closePath(); - this.stroke(); - }, - - closeFillStroke: function SVGGraphics_closeFillStroke() { - this.closePath(); - this.fillStroke(); - }, - - paintSolidColorImageMask: - function SVGGraphics_paintSolidColorImageMask() { - var current = this.current; - var rect = document.createElementNS(NS, 'svg:rect'); - rect.setAttributeNS(null, 'x', '0'); - rect.setAttributeNS(null, 'y', '0'); - rect.setAttributeNS(null, 'width', '1px'); - rect.setAttributeNS(null, 'height', '1px'); - rect.setAttributeNS(null, 'fill', current.fillColor); - this.tgrp.appendChild(rect); - }, - - paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) { - var current = this.current; - var imgObj = this.objs.get(objId); - var imgEl = document.createElementNS(NS, 'svg:image'); - imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src); - imgEl.setAttributeNS(null, 'width', imgObj.width + 'px'); - imgEl.setAttributeNS(null, 'height', imgObj.height + 'px'); - imgEl.setAttributeNS(null, 'x', '0'); - imgEl.setAttributeNS(null, 'y', pf(-h)); - imgEl.setAttributeNS(null, 'transform', - 'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')'); - - this.tgrp.appendChild(imgEl); - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - }, - - paintImageXObject: function SVGGraphics_paintImageXObject(objId) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; - } - this.paintInlineImageXObject(imgData); - }, - - paintInlineImageXObject: - function SVGGraphics_paintInlineImageXObject(imgData, mask) { - var current = this.current; - var width = imgData.width; - var height = imgData.height; - - var imgSrc = convertImgDataToPng(imgData); - var cliprect = document.createElementNS(NS, 'svg:rect'); - cliprect.setAttributeNS(null, 'x', '0'); - cliprect.setAttributeNS(null, 'y', '0'); - cliprect.setAttributeNS(null, 'width', pf(width)); - cliprect.setAttributeNS(null, 'height', pf(height)); - current.element = cliprect; - this.clip('nonzero'); - var imgEl = document.createElementNS(NS, 'svg:image'); - imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc); - imgEl.setAttributeNS(null, 'x', '0'); - imgEl.setAttributeNS(null, 'y', pf(-height)); - imgEl.setAttributeNS(null, 'width', pf(width) + 'px'); - imgEl.setAttributeNS(null, 'height', pf(height) + 'px'); - imgEl.setAttributeNS(null, 'transform', - 'scale(' + pf(1 / width) + ' ' + - pf(-1 / height) + ')'); - if (mask) { - mask.appendChild(imgEl); - } else { - this.tgrp.appendChild(imgEl); - } - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - }, - - paintImageMaskXObject: - function SVGGraphics_paintImageMaskXObject(imgData) { - var current = this.current; - var width = imgData.width; - var height = imgData.height; - var fillColor = current.fillColor; - - current.maskId = 'mask' + maskCount++; - var mask = document.createElementNS(NS, 'svg:mask'); - mask.setAttributeNS(null, 'id', current.maskId); - - var rect = document.createElementNS(NS, 'svg:rect'); - rect.setAttributeNS(null, 'x', '0'); - rect.setAttributeNS(null, 'y', '0'); - rect.setAttributeNS(null, 'width', pf(width)); - rect.setAttributeNS(null, 'height', pf(height)); - rect.setAttributeNS(null, 'fill', fillColor); - rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')'); - this.defs.appendChild(mask); - this.tgrp.appendChild(rect); - - this.paintInlineImageXObject(imgData, mask); - }, - - paintFormXObjectBegin: - function SVGGraphics_paintFormXObjectBegin(matrix, bbox) { - this.save(); - - if (isArray(matrix) && matrix.length === 6) { - this.transform(matrix[0], matrix[1], matrix[2], - matrix[3], matrix[4], matrix[5]); - } - - if (isArray(bbox) && bbox.length === 4) { - var width = bbox[2] - bbox[0]; - var height = bbox[3] - bbox[1]; - - var cliprect = document.createElementNS(NS, 'svg:rect'); - cliprect.setAttributeNS(null, 'x', bbox[0]); - cliprect.setAttributeNS(null, 'y', bbox[1]); - cliprect.setAttributeNS(null, 'width', pf(width)); - cliprect.setAttributeNS(null, 'height', pf(height)); - this.current.element = cliprect; - this.clip('nonzero'); - this.endPath(); - } - }, - - paintFormXObjectEnd: - function SVGGraphics_paintFormXObjectEnd() { - this.restore(); - } - }; - return SVGGraphics; -})(); - -PDFJS.SVGGraphics = SVGGraphics; - -exports.SVGGraphics = SVGGraphics; -})); - - - - -var NetworkManager = (function NetworkManagerClosure() { - - var OK_RESPONSE = 200; - var PARTIAL_CONTENT_RESPONSE = 206; - - function NetworkManager(url, args) { - this.url = url; - args = args || {}; - this.isHttp = /^https?:/i.test(url); - this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; - this.withCredentials = args.withCredentials || false; - this.getXhr = args.getXhr || - function NetworkManager_getXhr() { - return new XMLHttpRequest(); - }; - - this.currXhrId = 0; - this.pendingRequests = {}; - this.loadedRequests = {}; - } - - function getArrayBuffer(xhr) { - var data = xhr.response; - if (typeof data !== 'string') { - return data; - } - var length = data.length; - var array = new Uint8Array(length); - for (var i = 0; i < length; i++) { - array[i] = data.charCodeAt(i) & 0xFF; - } - return array.buffer; - } - - var supportsMozChunked = (function supportsMozChunkedClosure() { - try { - var x = new XMLHttpRequest(); - // Firefox 37- required .open() to be called before setting responseType. - // https://bugzilla.mozilla.org/show_bug.cgi?id=707484 - // Even though the URL is not visited, .open() could fail if the URL is - // blocked, e.g. via the connect-src CSP directive or the NoScript addon. - // When this error occurs, this feature detection method will mistakenly - // report that moz-chunked-arraybuffer is not supported in Firefox 37-. - x.open('GET', 'https://example.com'); - x.responseType = 'moz-chunked-arraybuffer'; - return x.responseType === 'moz-chunked-arraybuffer'; - } catch (e) { - return false; - } - })(); - - NetworkManager.prototype = { - requestRange: function NetworkManager_requestRange(begin, end, listeners) { - var args = { - begin: begin, - end: end - }; - for (var prop in listeners) { - args[prop] = listeners[prop]; - } - return this.request(args); - }, - - requestFull: function NetworkManager_requestFull(listeners) { - return this.request(listeners); - }, - - request: function NetworkManager_request(args) { - var xhr = this.getXhr(); - var xhrId = this.currXhrId++; - var pendingRequest = this.pendingRequests[xhrId] = { - xhr: xhr - }; - - xhr.open('GET', this.url); - xhr.withCredentials = this.withCredentials; - for (var property in this.httpHeaders) { - var value = this.httpHeaders[property]; - if (typeof value === 'undefined') { - continue; - } - xhr.setRequestHeader(property, value); - } - if (this.isHttp && 'begin' in args && 'end' in args) { - var rangeStr = args.begin + '-' + (args.end - 1); - xhr.setRequestHeader('Range', 'bytes=' + rangeStr); - pendingRequest.expectedStatus = 206; - } else { - pendingRequest.expectedStatus = 200; - } - - var useMozChunkedLoading = supportsMozChunked && !!args.onProgressiveData; - if (useMozChunkedLoading) { - xhr.responseType = 'moz-chunked-arraybuffer'; - pendingRequest.onProgressiveData = args.onProgressiveData; - pendingRequest.mozChunked = true; - } else { - xhr.responseType = 'arraybuffer'; - } - - if (args.onError) { - xhr.onerror = function(evt) { - args.onError(xhr.status); - }; - } - xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); - xhr.onprogress = this.onProgress.bind(this, xhrId); - - pendingRequest.onHeadersReceived = args.onHeadersReceived; - pendingRequest.onDone = args.onDone; - pendingRequest.onError = args.onError; - pendingRequest.onProgress = args.onProgress; - - xhr.send(null); - - return xhrId; - }, - - onProgress: function NetworkManager_onProgress(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } - - if (pendingRequest.mozChunked) { - var chunk = getArrayBuffer(pendingRequest.xhr); - pendingRequest.onProgressiveData(chunk); - } - - var onProgress = pendingRequest.onProgress; - if (onProgress) { - onProgress(evt); - } - }, - - onStateChange: function NetworkManager_onStateChange(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } - - var xhr = pendingRequest.xhr; - if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { - pendingRequest.onHeadersReceived(); - delete pendingRequest.onHeadersReceived; - } - - if (xhr.readyState !== 4) { - return; - } - - if (!(xhrId in this.pendingRequests)) { - // The XHR request might have been aborted in onHeadersReceived() - // callback, in which case we should abort request - return; - } - - delete this.pendingRequests[xhrId]; - - // success status == 0 can be on ftp, file and other protocols - if (xhr.status === 0 && this.isHttp) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - var xhrStatus = xhr.status || OK_RESPONSE; - - // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: - // "A server MAY ignore the Range header". This means it's possible to - // get a 200 rather than a 206 response from a range request. - var ok_response_on_range_request = - xhrStatus === OK_RESPONSE && - pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; - - if (!ok_response_on_range_request && - xhrStatus !== pendingRequest.expectedStatus) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - - this.loadedRequests[xhrId] = true; - - var chunk = getArrayBuffer(xhr); - if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { - var rangeHeader = xhr.getResponseHeader('Content-Range'); - var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); - var begin = parseInt(matches[1], 10); - pendingRequest.onDone({ - begin: begin, - chunk: chunk - }); - } else if (pendingRequest.onProgressiveData) { - pendingRequest.onDone(null); - } else if (chunk) { - pendingRequest.onDone({ - begin: 0, - chunk: chunk - }); - } else if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - }, - - hasPendingRequests: function NetworkManager_hasPendingRequests() { - for (var xhrId in this.pendingRequests) { - return true; - } - return false; - }, - - getRequestXhr: function NetworkManager_getXhr(xhrId) { - return this.pendingRequests[xhrId].xhr; - }, - - isStreamingRequest: function NetworkManager_isStreamingRequest(xhrId) { - return !!(this.pendingRequests[xhrId].onProgressiveData); - }, - - isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { - return xhrId in this.pendingRequests; - }, - - isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { - return xhrId in this.loadedRequests; - }, - - abortAllRequests: function NetworkManager_abortAllRequests() { - for (var xhrId in this.pendingRequests) { - this.abortRequest(xhrId | 0); - } - }, - - abortRequest: function NetworkManager_abortRequest(xhrId) { - var xhr = this.pendingRequests[xhrId].xhr; - delete this.pendingRequests[xhrId]; - xhr.abort(); - } - }; - - return NetworkManager; -})(); - - -(function (root, factory) { - { - factory((root.pdfjsCoreArithmeticDecoder = {})); - } -}(this, function (exports) { - -/* This class implements the QM Coder decoding as defined in - * JPEG 2000 Part I Final Committee Draft Version 1.0 - * Annex C.3 Arithmetic decoding procedure - * available at http://www.jpeg.org/public/fcd15444-1.pdf - * - * The arithmetic decoder is used in conjunction with context models to decode - * JPEG2000 and JBIG2 streams. - */ -var ArithmeticDecoder = (function ArithmeticDecoderClosure() { - // Table C-2 - var QeTable = [ - {qe: 0x5601, nmps: 1, nlps: 1, switchFlag: 1}, - {qe: 0x3401, nmps: 2, nlps: 6, switchFlag: 0}, - {qe: 0x1801, nmps: 3, nlps: 9, switchFlag: 0}, - {qe: 0x0AC1, nmps: 4, nlps: 12, switchFlag: 0}, - {qe: 0x0521, nmps: 5, nlps: 29, switchFlag: 0}, - {qe: 0x0221, nmps: 38, nlps: 33, switchFlag: 0}, - {qe: 0x5601, nmps: 7, nlps: 6, switchFlag: 1}, - {qe: 0x5401, nmps: 8, nlps: 14, switchFlag: 0}, - {qe: 0x4801, nmps: 9, nlps: 14, switchFlag: 0}, - {qe: 0x3801, nmps: 10, nlps: 14, switchFlag: 0}, - {qe: 0x3001, nmps: 11, nlps: 17, switchFlag: 0}, - {qe: 0x2401, nmps: 12, nlps: 18, switchFlag: 0}, - {qe: 0x1C01, nmps: 13, nlps: 20, switchFlag: 0}, - {qe: 0x1601, nmps: 29, nlps: 21, switchFlag: 0}, - {qe: 0x5601, nmps: 15, nlps: 14, switchFlag: 1}, - {qe: 0x5401, nmps: 16, nlps: 14, switchFlag: 0}, - {qe: 0x5101, nmps: 17, nlps: 15, switchFlag: 0}, - {qe: 0x4801, nmps: 18, nlps: 16, switchFlag: 0}, - {qe: 0x3801, nmps: 19, nlps: 17, switchFlag: 0}, - {qe: 0x3401, nmps: 20, nlps: 18, switchFlag: 0}, - {qe: 0x3001, nmps: 21, nlps: 19, switchFlag: 0}, - {qe: 0x2801, nmps: 22, nlps: 19, switchFlag: 0}, - {qe: 0x2401, nmps: 23, nlps: 20, switchFlag: 0}, - {qe: 0x2201, nmps: 24, nlps: 21, switchFlag: 0}, - {qe: 0x1C01, nmps: 25, nlps: 22, switchFlag: 0}, - {qe: 0x1801, nmps: 26, nlps: 23, switchFlag: 0}, - {qe: 0x1601, nmps: 27, nlps: 24, switchFlag: 0}, - {qe: 0x1401, nmps: 28, nlps: 25, switchFlag: 0}, - {qe: 0x1201, nmps: 29, nlps: 26, switchFlag: 0}, - {qe: 0x1101, nmps: 30, nlps: 27, switchFlag: 0}, - {qe: 0x0AC1, nmps: 31, nlps: 28, switchFlag: 0}, - {qe: 0x09C1, nmps: 32, nlps: 29, switchFlag: 0}, - {qe: 0x08A1, nmps: 33, nlps: 30, switchFlag: 0}, - {qe: 0x0521, nmps: 34, nlps: 31, switchFlag: 0}, - {qe: 0x0441, nmps: 35, nlps: 32, switchFlag: 0}, - {qe: 0x02A1, nmps: 36, nlps: 33, switchFlag: 0}, - {qe: 0x0221, nmps: 37, nlps: 34, switchFlag: 0}, - {qe: 0x0141, nmps: 38, nlps: 35, switchFlag: 0}, - {qe: 0x0111, nmps: 39, nlps: 36, switchFlag: 0}, - {qe: 0x0085, nmps: 40, nlps: 37, switchFlag: 0}, - {qe: 0x0049, nmps: 41, nlps: 38, switchFlag: 0}, - {qe: 0x0025, nmps: 42, nlps: 39, switchFlag: 0}, - {qe: 0x0015, nmps: 43, nlps: 40, switchFlag: 0}, - {qe: 0x0009, nmps: 44, nlps: 41, switchFlag: 0}, - {qe: 0x0005, nmps: 45, nlps: 42, switchFlag: 0}, - {qe: 0x0001, nmps: 45, nlps: 43, switchFlag: 0}, - {qe: 0x5601, nmps: 46, nlps: 46, switchFlag: 0} - ]; - - // C.3.5 Initialisation of the decoder (INITDEC) - function ArithmeticDecoder(data, start, end) { - this.data = data; - this.bp = start; - this.dataEnd = end; - - this.chigh = data[start]; - this.clow = 0; - - this.byteIn(); - - this.chigh = ((this.chigh << 7) & 0xFFFF) | ((this.clow >> 9) & 0x7F); - this.clow = (this.clow << 7) & 0xFFFF; - this.ct -= 7; - this.a = 0x8000; - } - - ArithmeticDecoder.prototype = { - // C.3.4 Compressed data input (BYTEIN) - byteIn: function ArithmeticDecoder_byteIn() { - var data = this.data; - var bp = this.bp; - if (data[bp] === 0xFF) { - var b1 = data[bp + 1]; - if (b1 > 0x8F) { - this.clow += 0xFF00; - this.ct = 8; - } else { - bp++; - this.clow += (data[bp] << 9); - this.ct = 7; - this.bp = bp; - } - } else { - bp++; - this.clow += bp < this.dataEnd ? (data[bp] << 8) : 0xFF00; - this.ct = 8; - this.bp = bp; - } - if (this.clow > 0xFFFF) { - this.chigh += (this.clow >> 16); - this.clow &= 0xFFFF; - } - }, - // C.3.2 Decoding a decision (DECODE) - readBit: function ArithmeticDecoder_readBit(contexts, pos) { - // contexts are packed into 1 byte: - // highest 7 bits carry cx.index, lowest bit carries cx.mps - var cx_index = contexts[pos] >> 1, cx_mps = contexts[pos] & 1; - var qeTableIcx = QeTable[cx_index]; - var qeIcx = qeTableIcx.qe; - var d; - var a = this.a - qeIcx; - - if (this.chigh < qeIcx) { - // exchangeLps - if (a < qeIcx) { - a = qeIcx; - d = cx_mps; - cx_index = qeTableIcx.nmps; - } else { - a = qeIcx; - d = 1 ^ cx_mps; - if (qeTableIcx.switchFlag === 1) { - cx_mps = d; - } - cx_index = qeTableIcx.nlps; - } - } else { - this.chigh -= qeIcx; - if ((a & 0x8000) !== 0) { - this.a = a; - return cx_mps; - } - // exchangeMps - if (a < qeIcx) { - d = 1 ^ cx_mps; - if (qeTableIcx.switchFlag === 1) { - cx_mps = d; - } - cx_index = qeTableIcx.nlps; - } else { - d = cx_mps; - cx_index = qeTableIcx.nmps; - } - } - // C.3.3 renormD; - do { - if (this.ct === 0) { - this.byteIn(); - } - - a <<= 1; - this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1); - this.clow = (this.clow << 1) & 0xFFFF; - this.ct--; - } while ((a & 0x8000) === 0); - this.a = a; - - contexts[pos] = cx_index << 1 | cx_mps; - return d; - } - }; - - return ArithmeticDecoder; -})(); - -exports.ArithmeticDecoder = ArithmeticDecoder; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCoreCharsets = {})); - } -}(this, function (exports) { - -var ISOAdobeCharset = [ - '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', - 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', - 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', - 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', - 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', - 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', - 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', - 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', - 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', - 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', - 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', - 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', - 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', - 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', - 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', - 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', - 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', - 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', - 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', - 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', - 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', - 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', - 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', - 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', - 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', - 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', - 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', - 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', - 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', - 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', - 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', - 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', - 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', - 'ugrave', 'yacute', 'ydieresis', 'zcaron' -]; - -var ExpertCharset = [ - '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', - 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', - 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', - 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', - 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', - 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', - 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', - 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', - 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', - 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', - 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', - 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', - 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', - 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', - 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', - 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', - 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', - 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', - 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', - 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', - 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', - 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', - 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', - 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', - 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', - 'Ydieresissmall' -]; - -var ExpertSubsetCharset = [ - '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', - 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', - 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', - 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', - 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', - 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', - 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', - 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', - 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior' -]; - -exports.ISOAdobeCharset = ISOAdobeCharset; -exports.ExpertCharset = ExpertCharset; -exports.ExpertSubsetCharset = ExpertSubsetCharset; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCoreGlyphList = {})); - } -}(this, function (exports) { +}(this, function (exports) { var GlyphsUnicode = { A: 0x0041, @@ -18175,14087 +8509,23765 @@ var Metrics = { 'imacron': 278, 'Euro': 500 }, - 'ZapfDingbats': { - 'space': 278, - 'a1': 974, - 'a2': 961, - 'a202': 974, - 'a3': 980, - 'a4': 719, - 'a5': 789, - 'a119': 790, - 'a118': 791, - 'a117': 690, - 'a11': 960, - 'a12': 939, - 'a13': 549, - 'a14': 855, - 'a15': 911, - 'a16': 933, - 'a105': 911, - 'a17': 945, - 'a18': 974, - 'a19': 755, - 'a20': 846, - 'a21': 762, - 'a22': 761, - 'a23': 571, - 'a24': 677, - 'a25': 763, - 'a26': 760, - 'a27': 759, - 'a28': 754, - 'a6': 494, - 'a7': 552, - 'a8': 537, - 'a9': 577, - 'a10': 692, - 'a29': 786, - 'a30': 788, - 'a31': 788, - 'a32': 790, - 'a33': 793, - 'a34': 794, - 'a35': 816, - 'a36': 823, - 'a37': 789, - 'a38': 841, - 'a39': 823, - 'a40': 833, - 'a41': 816, - 'a42': 831, - 'a43': 923, - 'a44': 744, - 'a45': 723, - 'a46': 749, - 'a47': 790, - 'a48': 792, - 'a49': 695, - 'a50': 776, - 'a51': 768, - 'a52': 792, - 'a53': 759, - 'a54': 707, - 'a55': 708, - 'a56': 682, - 'a57': 701, - 'a58': 826, - 'a59': 815, - 'a60': 789, - 'a61': 789, - 'a62': 707, - 'a63': 687, - 'a64': 696, - 'a65': 689, - 'a66': 786, - 'a67': 787, - 'a68': 713, - 'a69': 791, - 'a70': 785, - 'a71': 791, - 'a72': 873, - 'a73': 761, - 'a74': 762, - 'a203': 762, - 'a75': 759, - 'a204': 759, - 'a76': 892, - 'a77': 892, - 'a78': 788, - 'a79': 784, - 'a81': 438, - 'a82': 138, - 'a83': 277, - 'a84': 415, - 'a97': 392, - 'a98': 392, - 'a99': 668, - 'a100': 668, - 'a89': 390, - 'a90': 390, - 'a93': 317, - 'a94': 317, - 'a91': 276, - 'a92': 276, - 'a205': 509, - 'a85': 509, - 'a206': 410, - 'a86': 410, - 'a87': 234, - 'a88': 234, - 'a95': 334, - 'a96': 334, - 'a101': 732, - 'a102': 544, - 'a103': 544, - 'a104': 910, - 'a106': 667, - 'a107': 760, - 'a108': 760, - 'a112': 776, - 'a111': 595, - 'a110': 694, - 'a109': 626, - 'a120': 788, - 'a121': 788, - 'a122': 788, - 'a123': 788, - 'a124': 788, - 'a125': 788, - 'a126': 788, - 'a127': 788, - 'a128': 788, - 'a129': 788, - 'a130': 788, - 'a131': 788, - 'a132': 788, - 'a133': 788, - 'a134': 788, - 'a135': 788, - 'a136': 788, - 'a137': 788, - 'a138': 788, - 'a139': 788, - 'a140': 788, - 'a141': 788, - 'a142': 788, - 'a143': 788, - 'a144': 788, - 'a145': 788, - 'a146': 788, - 'a147': 788, - 'a148': 788, - 'a149': 788, - 'a150': 788, - 'a151': 788, - 'a152': 788, - 'a153': 788, - 'a154': 788, - 'a155': 788, - 'a156': 788, - 'a157': 788, - 'a158': 788, - 'a159': 788, - 'a160': 894, - 'a161': 838, - 'a163': 1016, - 'a164': 458, - 'a196': 748, - 'a165': 924, - 'a192': 748, - 'a166': 918, - 'a167': 927, - 'a168': 928, - 'a169': 928, - 'a170': 834, - 'a171': 873, - 'a172': 828, - 'a173': 924, - 'a162': 924, - 'a174': 917, - 'a175': 930, - 'a176': 931, - 'a177': 463, - 'a178': 883, - 'a179': 836, - 'a193': 836, - 'a180': 867, - 'a199': 867, - 'a181': 696, - 'a200': 696, - 'a182': 874, - 'a201': 874, - 'a183': 760, - 'a184': 946, - 'a197': 771, - 'a185': 865, - 'a194': 771, - 'a198': 888, - 'a186': 967, - 'a195': 888, - 'a187': 831, - 'a188': 873, - 'a189': 927, - 'a190': 970, - 'a191': 918 + 'ZapfDingbats': { + 'space': 278, + 'a1': 974, + 'a2': 961, + 'a202': 974, + 'a3': 980, + 'a4': 719, + 'a5': 789, + 'a119': 790, + 'a118': 791, + 'a117': 690, + 'a11': 960, + 'a12': 939, + 'a13': 549, + 'a14': 855, + 'a15': 911, + 'a16': 933, + 'a105': 911, + 'a17': 945, + 'a18': 974, + 'a19': 755, + 'a20': 846, + 'a21': 762, + 'a22': 761, + 'a23': 571, + 'a24': 677, + 'a25': 763, + 'a26': 760, + 'a27': 759, + 'a28': 754, + 'a6': 494, + 'a7': 552, + 'a8': 537, + 'a9': 577, + 'a10': 692, + 'a29': 786, + 'a30': 788, + 'a31': 788, + 'a32': 790, + 'a33': 793, + 'a34': 794, + 'a35': 816, + 'a36': 823, + 'a37': 789, + 'a38': 841, + 'a39': 823, + 'a40': 833, + 'a41': 816, + 'a42': 831, + 'a43': 923, + 'a44': 744, + 'a45': 723, + 'a46': 749, + 'a47': 790, + 'a48': 792, + 'a49': 695, + 'a50': 776, + 'a51': 768, + 'a52': 792, + 'a53': 759, + 'a54': 707, + 'a55': 708, + 'a56': 682, + 'a57': 701, + 'a58': 826, + 'a59': 815, + 'a60': 789, + 'a61': 789, + 'a62': 707, + 'a63': 687, + 'a64': 696, + 'a65': 689, + 'a66': 786, + 'a67': 787, + 'a68': 713, + 'a69': 791, + 'a70': 785, + 'a71': 791, + 'a72': 873, + 'a73': 761, + 'a74': 762, + 'a203': 762, + 'a75': 759, + 'a204': 759, + 'a76': 892, + 'a77': 892, + 'a78': 788, + 'a79': 784, + 'a81': 438, + 'a82': 138, + 'a83': 277, + 'a84': 415, + 'a97': 392, + 'a98': 392, + 'a99': 668, + 'a100': 668, + 'a89': 390, + 'a90': 390, + 'a93': 317, + 'a94': 317, + 'a91': 276, + 'a92': 276, + 'a205': 509, + 'a85': 509, + 'a206': 410, + 'a86': 410, + 'a87': 234, + 'a88': 234, + 'a95': 334, + 'a96': 334, + 'a101': 732, + 'a102': 544, + 'a103': 544, + 'a104': 910, + 'a106': 667, + 'a107': 760, + 'a108': 760, + 'a112': 776, + 'a111': 595, + 'a110': 694, + 'a109': 626, + 'a120': 788, + 'a121': 788, + 'a122': 788, + 'a123': 788, + 'a124': 788, + 'a125': 788, + 'a126': 788, + 'a127': 788, + 'a128': 788, + 'a129': 788, + 'a130': 788, + 'a131': 788, + 'a132': 788, + 'a133': 788, + 'a134': 788, + 'a135': 788, + 'a136': 788, + 'a137': 788, + 'a138': 788, + 'a139': 788, + 'a140': 788, + 'a141': 788, + 'a142': 788, + 'a143': 788, + 'a144': 788, + 'a145': 788, + 'a146': 788, + 'a147': 788, + 'a148': 788, + 'a149': 788, + 'a150': 788, + 'a151': 788, + 'a152': 788, + 'a153': 788, + 'a154': 788, + 'a155': 788, + 'a156': 788, + 'a157': 788, + 'a158': 788, + 'a159': 788, + 'a160': 894, + 'a161': 838, + 'a163': 1016, + 'a164': 458, + 'a196': 748, + 'a165': 924, + 'a192': 748, + 'a166': 918, + 'a167': 927, + 'a168': 928, + 'a169': 928, + 'a170': 834, + 'a171': 873, + 'a172': 828, + 'a173': 924, + 'a162': 924, + 'a174': 917, + 'a175': 930, + 'a176': 931, + 'a177': 463, + 'a178': 883, + 'a179': 836, + 'a193': 836, + 'a180': 867, + 'a199': 867, + 'a181': 696, + 'a200': 696, + 'a182': 874, + 'a201': 874, + 'a183': 760, + 'a184': 946, + 'a197': 771, + 'a185': 865, + 'a194': 771, + 'a198': 888, + 'a186': 967, + 'a195': 888, + 'a187': 831, + 'a188': 873, + 'a189': 927, + 'a190': 970, + 'a191': 918 + } +}; + +exports.Metrics = Metrics; +})); + + + + +var NetworkManager = (function NetworkManagerClosure() { + + var OK_RESPONSE = 200; + var PARTIAL_CONTENT_RESPONSE = 206; + + function NetworkManager(url, args) { + this.url = url; + args = args || {}; + this.isHttp = /^https?:/i.test(url); + this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; + this.withCredentials = args.withCredentials || false; + this.getXhr = args.getXhr || + function NetworkManager_getXhr() { + return new XMLHttpRequest(); + }; + + this.currXhrId = 0; + this.pendingRequests = {}; + this.loadedRequests = {}; + } + + function getArrayBuffer(xhr) { + var data = xhr.response; + if (typeof data !== 'string') { + return data; + } + var length = data.length; + var array = new Uint8Array(length); + for (var i = 0; i < length; i++) { + array[i] = data.charCodeAt(i) & 0xFF; + } + return array.buffer; + } + + var supportsMozChunked = (function supportsMozChunkedClosure() { + try { + var x = new XMLHttpRequest(); + // Firefox 37- required .open() to be called before setting responseType. + // https://bugzilla.mozilla.org/show_bug.cgi?id=707484 + // Even though the URL is not visited, .open() could fail if the URL is + // blocked, e.g. via the connect-src CSP directive or the NoScript addon. + // When this error occurs, this feature detection method will mistakenly + // report that moz-chunked-arraybuffer is not supported in Firefox 37-. + x.open('GET', 'https://example.com'); + x.responseType = 'moz-chunked-arraybuffer'; + return x.responseType === 'moz-chunked-arraybuffer'; + } catch (e) { + return false; + } + })(); + + NetworkManager.prototype = { + requestRange: function NetworkManager_requestRange(begin, end, listeners) { + var args = { + begin: begin, + end: end + }; + for (var prop in listeners) { + args[prop] = listeners[prop]; + } + return this.request(args); + }, + + requestFull: function NetworkManager_requestFull(listeners) { + return this.request(listeners); + }, + + request: function NetworkManager_request(args) { + var xhr = this.getXhr(); + var xhrId = this.currXhrId++; + var pendingRequest = this.pendingRequests[xhrId] = { + xhr: xhr + }; + + xhr.open('GET', this.url); + xhr.withCredentials = this.withCredentials; + for (var property in this.httpHeaders) { + var value = this.httpHeaders[property]; + if (typeof value === 'undefined') { + continue; + } + xhr.setRequestHeader(property, value); + } + if (this.isHttp && 'begin' in args && 'end' in args) { + var rangeStr = args.begin + '-' + (args.end - 1); + xhr.setRequestHeader('Range', 'bytes=' + rangeStr); + pendingRequest.expectedStatus = 206; + } else { + pendingRequest.expectedStatus = 200; + } + + var useMozChunkedLoading = supportsMozChunked && !!args.onProgressiveData; + if (useMozChunkedLoading) { + xhr.responseType = 'moz-chunked-arraybuffer'; + pendingRequest.onProgressiveData = args.onProgressiveData; + pendingRequest.mozChunked = true; + } else { + xhr.responseType = 'arraybuffer'; + } + + if (args.onError) { + xhr.onerror = function(evt) { + args.onError(xhr.status); + }; + } + xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); + xhr.onprogress = this.onProgress.bind(this, xhrId); + + pendingRequest.onHeadersReceived = args.onHeadersReceived; + pendingRequest.onDone = args.onDone; + pendingRequest.onError = args.onError; + pendingRequest.onProgress = args.onProgress; + + xhr.send(null); + + return xhrId; + }, + + onProgress: function NetworkManager_onProgress(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } + + if (pendingRequest.mozChunked) { + var chunk = getArrayBuffer(pendingRequest.xhr); + pendingRequest.onProgressiveData(chunk); + } + + var onProgress = pendingRequest.onProgress; + if (onProgress) { + onProgress(evt); + } + }, + + onStateChange: function NetworkManager_onStateChange(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } + + var xhr = pendingRequest.xhr; + if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { + pendingRequest.onHeadersReceived(); + delete pendingRequest.onHeadersReceived; + } + + if (xhr.readyState !== 4) { + return; + } + + if (!(xhrId in this.pendingRequests)) { + // The XHR request might have been aborted in onHeadersReceived() + // callback, in which case we should abort request + return; + } + + delete this.pendingRequests[xhrId]; + + // success status == 0 can be on ftp, file and other protocols + if (xhr.status === 0 && this.isHttp) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } + var xhrStatus = xhr.status || OK_RESPONSE; + + // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: + // "A server MAY ignore the Range header". This means it's possible to + // get a 200 rather than a 206 response from a range request. + var ok_response_on_range_request = + xhrStatus === OK_RESPONSE && + pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; + + if (!ok_response_on_range_request && + xhrStatus !== pendingRequest.expectedStatus) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } + + this.loadedRequests[xhrId] = true; + + var chunk = getArrayBuffer(xhr); + if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { + var rangeHeader = xhr.getResponseHeader('Content-Range'); + var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); + var begin = parseInt(matches[1], 10); + pendingRequest.onDone({ + begin: begin, + chunk: chunk + }); + } else if (pendingRequest.onProgressiveData) { + pendingRequest.onDone(null); + } else if (chunk) { + pendingRequest.onDone({ + begin: 0, + chunk: chunk + }); + } else if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + }, + + hasPendingRequests: function NetworkManager_hasPendingRequests() { + for (var xhrId in this.pendingRequests) { + return true; + } + return false; + }, + + getRequestXhr: function NetworkManager_getXhr(xhrId) { + return this.pendingRequests[xhrId].xhr; + }, + + isStreamingRequest: function NetworkManager_isStreamingRequest(xhrId) { + return !!(this.pendingRequests[xhrId].onProgressiveData); + }, + + isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { + return xhrId in this.pendingRequests; + }, + + isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { + return xhrId in this.loadedRequests; + }, + + abortAllRequests: function NetworkManager_abortAllRequests() { + for (var xhrId in this.pendingRequests) { + this.abortRequest(xhrId | 0); + } + }, + + abortRequest: function NetworkManager_abortRequest(xhrId) { + var xhr = this.pendingRequests[xhrId].xhr; + delete this.pendingRequests[xhrId]; + xhr.abort(); + } + }; + + return NetworkManager; +})(); + +(function (root, factory) { + { + factory((root.pdfjsCoreNetwork = {})); + } +}(this, function (exports) { + exports.NetworkManager = NetworkManager; +})); + + +(function (root, factory) { + { + factory((root.pdfjsSharedGlobal = {})); + } +}(this, function (exports) { + + var globalScope = (typeof window !== 'undefined') ? window : + (typeof global !== 'undefined') ? global : + (typeof self !== 'undefined') ? self : this; + + var isWorker = (typeof window === 'undefined'); + + // The global PDFJS object exposes the API + // In production, it will be declared outside a global wrapper + // In development, it will be declared here + if (!globalScope.PDFJS) { + globalScope.PDFJS = {}; + } + + globalScope.PDFJS.pdfBug = false; + + exports.globalScope = globalScope; + exports.isWorker = isWorker; + exports.PDFJS = globalScope.PDFJS; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreBidi = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; + +var bidi = PDFJS.bidi = (function bidiClosure() { + // Character types for symbols from 0000 to 00FF. + var baseTypes = [ + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'S', 'B', 'S', 'WS', + 'B', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'BN', 'B', 'B', 'B', 'S', 'WS', 'ON', 'ON', 'ET', 'ET', 'ET', 'ON', + 'ON', 'ON', 'ON', 'ON', 'ON', 'CS', 'ON', 'CS', 'ON', 'EN', 'EN', 'EN', + 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'ON', 'ON', 'ON', 'ON', 'ON', + 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'ON', 'ON', + 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'ON', 'ON', 'ON', 'ON', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'B', 'BN', + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'CS', 'ON', 'ET', 'ET', 'ET', 'ET', 'ON', 'ON', 'ON', 'ON', 'L', 'ON', + 'ON', 'ON', 'ON', 'ON', 'ET', 'ET', 'EN', 'EN', 'ON', 'L', 'ON', 'ON', 'ON', + 'EN', 'L', 'ON', 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L' + ]; + + // Character types for symbols from 0600 to 06FF + var arabicTypes = [ + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'CS', 'AL', 'ON', 'ON', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', + 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', + 'AN', 'ET', 'AN', 'AN', 'AL', 'AL', 'AL', 'NSM', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', + 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'ON', 'NSM', + 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL' + ]; + + function isOdd(i) { + return (i & 1) !== 0; + } + + function isEven(i) { + return (i & 1) === 0; + } + + function findUnequal(arr, start, value) { + for (var j = start, jj = arr.length; j < jj; ++j) { + if (arr[j] !== value) { + return j; + } + } + return j; + } + + function setValues(arr, start, end, value) { + for (var j = start; j < end; ++j) { + arr[j] = value; + } + } + + function reverseValues(arr, start, end) { + for (var i = start, j = end - 1; i < j; ++i, --j) { + var temp = arr[i]; + arr[i] = arr[j]; + arr[j] = temp; + } + } + + function createBidiText(str, isLTR, vertical) { + return { + str: str, + dir: (vertical ? 'ttb' : (isLTR ? 'ltr' : 'rtl')) + }; + } + + // These are used in bidi(), which is called frequently. We re-use them on + // each call to avoid unnecessary allocations. + var chars = []; + var types = []; + + function bidi(str, startLevel, vertical) { + var isLTR = true; + var strLength = str.length; + if (strLength === 0 || vertical) { + return createBidiText(str, isLTR, vertical); + } + + // Get types and fill arrays + chars.length = strLength; + types.length = strLength; + var numBidi = 0; + + var i, ii; + for (i = 0; i < strLength; ++i) { + chars[i] = str.charAt(i); + + var charCode = str.charCodeAt(i); + var charType = 'L'; + if (charCode <= 0x00ff) { + charType = baseTypes[charCode]; + } else if (0x0590 <= charCode && charCode <= 0x05f4) { + charType = 'R'; + } else if (0x0600 <= charCode && charCode <= 0x06ff) { + charType = arabicTypes[charCode & 0xff]; + } else if (0x0700 <= charCode && charCode <= 0x08AC) { + charType = 'AL'; + } + if (charType === 'R' || charType === 'AL' || charType === 'AN') { + numBidi++; + } + types[i] = charType; + } + + // Detect the bidi method + // - If there are no rtl characters then no bidi needed + // - If less than 30% chars are rtl then string is primarily ltr + // - If more than 30% chars are rtl then string is primarily rtl + if (numBidi === 0) { + isLTR = true; + return createBidiText(str, isLTR); + } + + if (startLevel === -1) { + if ((strLength / numBidi) < 0.3) { + isLTR = true; + startLevel = 0; + } else { + isLTR = false; + startLevel = 1; + } + } + + var levels = []; + for (i = 0; i < strLength; ++i) { + levels[i] = startLevel; + } + + /* + X1-X10: skip most of this, since we are NOT doing the embeddings. + */ + var e = (isOdd(startLevel) ? 'R' : 'L'); + var sor = e; + var eor = sor; + + /* + W1. Examine each non-spacing mark (NSM) in the level run, and change the + type of the NSM to the type of the previous character. If the NSM is at the + start of the level run, it will get the type of sor. + */ + var lastType = sor; + for (i = 0; i < strLength; ++i) { + if (types[i] === 'NSM') { + types[i] = lastType; + } else { + lastType = types[i]; + } + } + + /* + W2. Search backwards from each instance of a European number until the + first strong type (R, L, AL, or sor) is found. If an AL is found, change + the type of the European number to Arabic number. + */ + lastType = sor; + var t; + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'EN') { + types[i] = (lastType === 'AL') ? 'AN' : 'EN'; + } else if (t === 'R' || t === 'L' || t === 'AL') { + lastType = t; + } + } + + /* + W3. Change all ALs to R. + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'AL') { + types[i] = 'R'; + } + } + + /* + W4. A single European separator between two European numbers changes to a + European number. A single common separator between two numbers of the same + type changes to that type: + */ + for (i = 1; i < strLength - 1; ++i) { + if (types[i] === 'ES' && types[i - 1] === 'EN' && types[i + 1] === 'EN') { + types[i] = 'EN'; + } + if (types[i] === 'CS' && + (types[i - 1] === 'EN' || types[i - 1] === 'AN') && + types[i + 1] === types[i - 1]) { + types[i] = types[i - 1]; + } + } + + /* + W5. A sequence of European terminators adjacent to European numbers changes + to all European numbers: + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'EN') { + // do before + var j; + for (j = i - 1; j >= 0; --j) { + if (types[j] !== 'ET') { + break; + } + types[j] = 'EN'; + } + // do after + for (j = i + 1; j < strLength; --j) { + if (types[j] !== 'ET') { + break; + } + types[j] = 'EN'; + } + } + } + + /* + W6. Otherwise, separators and terminators change to Other Neutral: + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'WS' || t === 'ES' || t === 'ET' || t === 'CS') { + types[i] = 'ON'; + } + } + + /* + W7. Search backwards from each instance of a European number until the + first strong type (R, L, or sor) is found. If an L is found, then change + the type of the European number to L. + */ + lastType = sor; + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'EN') { + types[i] = ((lastType === 'L') ? 'L' : 'EN'); + } else if (t === 'R' || t === 'L') { + lastType = t; + } + } + + /* + N1. A sequence of neutrals takes the direction of the surrounding strong + text if the text on both sides has the same direction. European and Arabic + numbers are treated as though they were R. Start-of-level-run (sor) and + end-of-level-run (eor) are used at level run boundaries. + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'ON') { + var end = findUnequal(types, i + 1, 'ON'); + var before = sor; + if (i > 0) { + before = types[i - 1]; + } + + var after = eor; + if (end + 1 < strLength) { + after = types[end + 1]; + } + if (before !== 'L') { + before = 'R'; + } + if (after !== 'L') { + after = 'R'; + } + if (before === after) { + setValues(types, i, end, before); + } + i = end - 1; // reset to end (-1 so next iteration is ok) + } + } + + /* + N2. Any remaining neutrals take the embedding direction. + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'ON') { + types[i] = e; + } + } + + /* + I1. For all characters with an even (left-to-right) embedding direction, + those of type R go up one level and those of type AN or EN go up two + levels. + I2. For all characters with an odd (right-to-left) embedding direction, + those of type L, EN or AN go up one level. + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (isEven(levels[i])) { + if (t === 'R') { + levels[i] += 1; + } else if (t === 'AN' || t === 'EN') { + levels[i] += 2; + } + } else { // isOdd + if (t === 'L' || t === 'AN' || t === 'EN') { + levels[i] += 1; + } + } + } + + /* + L1. On each line, reset the embedding level of the following characters to + the paragraph embedding level: + + segment separators, + paragraph separators, + any sequence of whitespace characters preceding a segment separator or + paragraph separator, and any sequence of white space characters at the end + of the line. + */ + + // don't bother as text is only single line + + /* + L2. From the highest level found in the text to the lowest odd level on + each line, reverse any contiguous sequence of characters that are at that + level or higher. + */ + + // find highest level & lowest odd level + var highestLevel = -1; + var lowestOddLevel = 99; + var level; + for (i = 0, ii = levels.length; i < ii; ++i) { + level = levels[i]; + if (highestLevel < level) { + highestLevel = level; + } + if (lowestOddLevel > level && isOdd(level)) { + lowestOddLevel = level; + } + } + + // now reverse between those limits + for (level = highestLevel; level >= lowestOddLevel; --level) { + // find segments to reverse + var start = -1; + for (i = 0, ii = levels.length; i < ii; ++i) { + if (levels[i] < level) { + if (start >= 0) { + reverseValues(chars, start, i); + start = -1; + } + } else if (start < 0) { + start = i; + } + } + if (start >= 0) { + reverseValues(chars, start, levels.length); + } + } + + /* + L3. Combining marks applied to a right-to-left base character will at this + point precede their base character. If the rendering engine expects them to + follow the base characters in the final display process, then the ordering + of the marks and the base character must be reversed. + */ + + // don't bother for now + + /* + L4. A character that possesses the mirrored property as specified by + Section 4.7, Mirrored, must be depicted by a mirrored glyph if the resolved + directionality of that character is R. + */ + + // don't mirror as characters are already mirrored in the pdf + + // Finally, return string + for (i = 0, ii = chars.length; i < ii; ++i) { + var ch = chars[i]; + if (ch === '<' || ch === '>') { + chars[i] = ''; + } + } + return createBidiText(chars.join(''), isLTR); + } + + return bidi; +})(); + +exports.bidi = bidi; +})); + + +(function (root, factory) { + { + factory((root.pdfjsDisplayDOMUtils = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; + +/** + * Optimised CSS custom property getter/setter. + * @class + */ +var CustomStyle = (function CustomStyleClosure() { + + // As noted on: http://www.zachstronaut.com/posts/2009/02/17/ + // animate-css-transforms-firefox-webkit.html + // in some versions of IE9 it is critical that ms appear in this list + // before Moz + var prefixes = ['ms', 'Moz', 'Webkit', 'O']; + var _cache = {}; + + function CustomStyle() {} + + CustomStyle.getProp = function get(propName, element) { + // check cache only when no element is given + if (arguments.length === 1 && typeof _cache[propName] === 'string') { + return _cache[propName]; + } + + element = element || document.documentElement; + var style = element.style, prefixed, uPropName; + + // test standard property first + if (typeof style[propName] === 'string') { + return (_cache[propName] = propName); + } + + // capitalize + uPropName = propName.charAt(0).toUpperCase() + propName.slice(1); + + // test vendor specific properties + for (var i = 0, l = prefixes.length; i < l; i++) { + prefixed = prefixes[i] + uPropName; + if (typeof style[prefixed] === 'string') { + return (_cache[propName] = prefixed); + } + } + + //if all fails then set to undefined + return (_cache[propName] = 'undefined'); + }; + + CustomStyle.setProp = function set(propName, element, str) { + var prop = this.getProp(propName); + if (prop !== 'undefined') { + element.style[prop] = str; + } + }; + + return CustomStyle; +})(); + +PDFJS.CustomStyle = CustomStyle; + +exports.CustomStyle = CustomStyle; +})); + + +(function (root, factory) { + { + factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; +var globalScope = sharedGlobal.globalScope; + +var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0]; + +var TextRenderingMode = { + FILL: 0, + STROKE: 1, + FILL_STROKE: 2, + INVISIBLE: 3, + FILL_ADD_TO_PATH: 4, + STROKE_ADD_TO_PATH: 5, + FILL_STROKE_ADD_TO_PATH: 6, + ADD_TO_PATH: 7, + FILL_STROKE_MASK: 3, + ADD_TO_PATH_FLAG: 4 +}; + +var ImageKind = { + GRAYSCALE_1BPP: 1, + RGB_24BPP: 2, + RGBA_32BPP: 3 +}; + +var AnnotationType = { + TEXT: 1, + LINK: 2, + FREETEXT: 3, + LINE: 4, + SQUARE: 5, + CIRCLE: 6, + POLYGON: 7, + POLYLINE: 8, + HIGHLIGHT: 9, + UNDERLINE: 10, + SQUIGGLY: 11, + STRIKEOUT: 12, + STAMP: 13, + CARET: 14, + INK: 15, + POPUP: 16, + FILEATTACHMENT: 17, + SOUND: 18, + MOVIE: 19, + WIDGET: 20, + SCREEN: 21, + PRINTERMARK: 22, + TRAPNET: 23, + WATERMARK: 24, + THREED: 25, + REDACT: 26 +}; + +var AnnotationFlag = { + INVISIBLE: 0x01, + HIDDEN: 0x02, + PRINT: 0x04, + NOZOOM: 0x08, + NOROTATE: 0x10, + NOVIEW: 0x20, + READONLY: 0x40, + LOCKED: 0x80, + TOGGLENOVIEW: 0x100, + LOCKEDCONTENTS: 0x200 +}; + +var AnnotationBorderStyleType = { + SOLID: 1, + DASHED: 2, + BEVELED: 3, + INSET: 4, + UNDERLINE: 5 +}; + +var StreamType = { + UNKNOWN: 0, + FLATE: 1, + LZW: 2, + DCT: 3, + JPX: 4, + JBIG: 5, + A85: 6, + AHX: 7, + CCF: 8, + RL: 9 +}; + +var FontType = { + UNKNOWN: 0, + TYPE1: 1, + TYPE1C: 2, + CIDFONTTYPE0: 3, + CIDFONTTYPE0C: 4, + TRUETYPE: 5, + CIDFONTTYPE2: 6, + TYPE3: 7, + OPENTYPE: 8, + TYPE0: 9, + MMTYPE1: 10 +}; + +PDFJS.VERBOSITY_LEVELS = { + errors: 0, + warnings: 1, + infos: 5 +}; + +// All the possible operations for an operator list. +var OPS = PDFJS.OPS = { + // Intentionally start from 1 so it is easy to spot bad operators that will be + // 0's. + dependency: 1, + setLineWidth: 2, + setLineCap: 3, + setLineJoin: 4, + setMiterLimit: 5, + setDash: 6, + setRenderingIntent: 7, + setFlatness: 8, + setGState: 9, + save: 10, + restore: 11, + transform: 12, + moveTo: 13, + lineTo: 14, + curveTo: 15, + curveTo2: 16, + curveTo3: 17, + closePath: 18, + rectangle: 19, + stroke: 20, + closeStroke: 21, + fill: 22, + eoFill: 23, + fillStroke: 24, + eoFillStroke: 25, + closeFillStroke: 26, + closeEOFillStroke: 27, + endPath: 28, + clip: 29, + eoClip: 30, + beginText: 31, + endText: 32, + setCharSpacing: 33, + setWordSpacing: 34, + setHScale: 35, + setLeading: 36, + setFont: 37, + setTextRenderingMode: 38, + setTextRise: 39, + moveText: 40, + setLeadingMoveText: 41, + setTextMatrix: 42, + nextLine: 43, + showText: 44, + showSpacedText: 45, + nextLineShowText: 46, + nextLineSetSpacingShowText: 47, + setCharWidth: 48, + setCharWidthAndBounds: 49, + setStrokeColorSpace: 50, + setFillColorSpace: 51, + setStrokeColor: 52, + setStrokeColorN: 53, + setFillColor: 54, + setFillColorN: 55, + setStrokeGray: 56, + setFillGray: 57, + setStrokeRGBColor: 58, + setFillRGBColor: 59, + setStrokeCMYKColor: 60, + setFillCMYKColor: 61, + shadingFill: 62, + beginInlineImage: 63, + beginImageData: 64, + endInlineImage: 65, + paintXObject: 66, + markPoint: 67, + markPointProps: 68, + beginMarkedContent: 69, + beginMarkedContentProps: 70, + endMarkedContent: 71, + beginCompat: 72, + endCompat: 73, + paintFormXObjectBegin: 74, + paintFormXObjectEnd: 75, + beginGroup: 76, + endGroup: 77, + beginAnnotations: 78, + endAnnotations: 79, + beginAnnotation: 80, + endAnnotation: 81, + paintJpegXObject: 82, + paintImageMaskXObject: 83, + paintImageMaskXObjectGroup: 84, + paintImageXObject: 85, + paintInlineImageXObject: 86, + paintInlineImageXObjectGroup: 87, + paintImageXObjectRepeat: 88, + paintImageMaskXObjectRepeat: 89, + paintSolidColorImageMask: 90, + constructPath: 91 +}; + +// A notice for devs. These are good for things that are helpful to devs, such +// as warning that Workers were disabled, which is important to devs but not +// end users. +function info(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) { + console.log('Info: ' + msg); + } +} + +// Non-fatal warnings. +function warn(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) { + console.log('Warning: ' + msg); + } +} + +// Deprecated API function -- treated as warnings. +function deprecated(details) { + warn('Deprecated API usage: ' + details); +} + +// Fatal errors that should trigger the fallback UI and halt execution by +// throwing an exception. +function error(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) { + console.log('Error: ' + msg); + console.log(backtrace()); + } + throw new Error(msg); +} + +function backtrace() { + try { + throw new Error(); + } catch (e) { + return e.stack ? e.stack.split('\n').slice(2).join('\n') : ''; + } +} + +function assert(cond, msg) { + if (!cond) { + error(msg); + } +} + +var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = { + unknown: 'unknown', + forms: 'forms', + javaScript: 'javaScript', + smask: 'smask', + shadingPattern: 'shadingPattern', + font: 'font' +}; + +// Combines two URLs. The baseUrl shall be absolute URL. If the url is an +// absolute URL, it will be returned as is. +function combineUrl(baseUrl, url) { + if (!url) { + return baseUrl; + } + if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) { + return url; + } + var i; + if (url.charAt(0) === '/') { + // absolute path + i = baseUrl.indexOf('://'); + if (url.charAt(1) === '/') { + ++i; + } else { + i = baseUrl.indexOf('/', i + 3); + } + return baseUrl.substring(0, i) + url; + } else { + // relative path + var pathLength = baseUrl.length; + i = baseUrl.lastIndexOf('#'); + pathLength = i >= 0 ? i : pathLength; + i = baseUrl.lastIndexOf('?', pathLength); + pathLength = i >= 0 ? i : pathLength; + var prefixLength = baseUrl.lastIndexOf('/', pathLength); + return baseUrl.substring(0, prefixLength + 1) + url; + } +} + +// Validates if URL is safe and allowed, e.g. to avoid XSS. +function isValidUrl(url, allowRelative) { + if (!url) { + return false; + } + // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1) + // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) + var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url); + if (!protocol) { + return allowRelative; + } + protocol = protocol[0].toLowerCase(); + switch (protocol) { + case 'http': + case 'https': + case 'ftp': + case 'mailto': + case 'tel': + return true; + default: + return false; + } +} +PDFJS.isValidUrl = isValidUrl; + +function shadow(obj, prop, value) { + Object.defineProperty(obj, prop, { value: value, + enumerable: true, + configurable: true, + writable: false }); + return value; +} +PDFJS.shadow = shadow; + +var LinkTarget = PDFJS.LinkTarget = { + NONE: 0, // Default value. + SELF: 1, + BLANK: 2, + PARENT: 3, + TOP: 4, +}; +var LinkTargetStringMap = [ + '', + '_self', + '_blank', + '_parent', + '_top' +]; + +function isExternalLinkTargetSet() { + if (PDFJS.openExternalLinksInNewWindow) { + deprecated('PDFJS.openExternalLinksInNewWindow, please use ' + + '"PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK" instead.'); + if (PDFJS.externalLinkTarget === LinkTarget.NONE) { + PDFJS.externalLinkTarget = LinkTarget.BLANK; + } + // Reset the deprecated parameter, to suppress further warnings. + PDFJS.openExternalLinksInNewWindow = false; + } + switch (PDFJS.externalLinkTarget) { + case LinkTarget.NONE: + return false; + case LinkTarget.SELF: + case LinkTarget.BLANK: + case LinkTarget.PARENT: + case LinkTarget.TOP: + return true; + } + warn('PDFJS.externalLinkTarget is invalid: ' + PDFJS.externalLinkTarget); + // Reset the external link target, to suppress further warnings. + PDFJS.externalLinkTarget = LinkTarget.NONE; + return false; +} +PDFJS.isExternalLinkTargetSet = isExternalLinkTargetSet; + +var PasswordResponses = PDFJS.PasswordResponses = { + NEED_PASSWORD: 1, + INCORRECT_PASSWORD: 2 +}; + +var PasswordException = (function PasswordExceptionClosure() { + function PasswordException(msg, code) { + this.name = 'PasswordException'; + this.message = msg; + this.code = code; + } + + PasswordException.prototype = new Error(); + PasswordException.constructor = PasswordException; + + return PasswordException; +})(); +PDFJS.PasswordException = PasswordException; + +var UnknownErrorException = (function UnknownErrorExceptionClosure() { + function UnknownErrorException(msg, details) { + this.name = 'UnknownErrorException'; + this.message = msg; + this.details = details; + } + + UnknownErrorException.prototype = new Error(); + UnknownErrorException.constructor = UnknownErrorException; + + return UnknownErrorException; +})(); +PDFJS.UnknownErrorException = UnknownErrorException; + +var InvalidPDFException = (function InvalidPDFExceptionClosure() { + function InvalidPDFException(msg) { + this.name = 'InvalidPDFException'; + this.message = msg; + } + + InvalidPDFException.prototype = new Error(); + InvalidPDFException.constructor = InvalidPDFException; + + return InvalidPDFException; +})(); +PDFJS.InvalidPDFException = InvalidPDFException; + +var MissingPDFException = (function MissingPDFExceptionClosure() { + function MissingPDFException(msg) { + this.name = 'MissingPDFException'; + this.message = msg; + } + + MissingPDFException.prototype = new Error(); + MissingPDFException.constructor = MissingPDFException; + + return MissingPDFException; +})(); +PDFJS.MissingPDFException = MissingPDFException; + +var UnexpectedResponseException = + (function UnexpectedResponseExceptionClosure() { + function UnexpectedResponseException(msg, status) { + this.name = 'UnexpectedResponseException'; + this.message = msg; + this.status = status; + } + + UnexpectedResponseException.prototype = new Error(); + UnexpectedResponseException.constructor = UnexpectedResponseException; + + return UnexpectedResponseException; +})(); +PDFJS.UnexpectedResponseException = UnexpectedResponseException; + +var NotImplementedException = (function NotImplementedExceptionClosure() { + function NotImplementedException(msg) { + this.message = msg; + } + + NotImplementedException.prototype = new Error(); + NotImplementedException.prototype.name = 'NotImplementedException'; + NotImplementedException.constructor = NotImplementedException; + + return NotImplementedException; +})(); + +var MissingDataException = (function MissingDataExceptionClosure() { + function MissingDataException(begin, end) { + this.begin = begin; + this.end = end; + this.message = 'Missing data [' + begin + ', ' + end + ')'; + } + + MissingDataException.prototype = new Error(); + MissingDataException.prototype.name = 'MissingDataException'; + MissingDataException.constructor = MissingDataException; + + return MissingDataException; +})(); + +var XRefParseException = (function XRefParseExceptionClosure() { + function XRefParseException(msg) { + this.message = msg; + } + + XRefParseException.prototype = new Error(); + XRefParseException.prototype.name = 'XRefParseException'; + XRefParseException.constructor = XRefParseException; + + return XRefParseException; +})(); + + +function bytesToString(bytes) { + assert(bytes !== null && typeof bytes === 'object' && + bytes.length !== undefined, 'Invalid argument for bytesToString'); + var length = bytes.length; + var MAX_ARGUMENT_COUNT = 8192; + if (length < MAX_ARGUMENT_COUNT) { + return String.fromCharCode.apply(null, bytes); + } + var strBuf = []; + for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) { + var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length); + var chunk = bytes.subarray(i, chunkEnd); + strBuf.push(String.fromCharCode.apply(null, chunk)); + } + return strBuf.join(''); +} + +function stringToBytes(str) { + assert(typeof str === 'string', 'Invalid argument for stringToBytes'); + var length = str.length; + var bytes = new Uint8Array(length); + for (var i = 0; i < length; ++i) { + bytes[i] = str.charCodeAt(i) & 0xFF; + } + return bytes; +} + +function string32(value) { + return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff, + (value >> 8) & 0xff, value & 0xff); +} + +function log2(x) { + var n = 1, i = 0; + while (x > n) { + n <<= 1; + i++; + } + return i; +} + +function readInt8(data, start) { + return (data[start] << 24) >> 24; +} + +function readUint16(data, offset) { + return (data[offset] << 8) | data[offset + 1]; +} + +function readUint32(data, offset) { + return ((data[offset] << 24) | (data[offset + 1] << 16) | + (data[offset + 2] << 8) | data[offset + 3]) >>> 0; +} + +// Lazy test the endianness of the platform +// NOTE: This will be 'true' for simulated TypedArrays +function isLittleEndian() { + var buffer8 = new Uint8Array(2); + buffer8[0] = 1; + var buffer16 = new Uint16Array(buffer8.buffer); + return (buffer16[0] === 1); +} + +Object.defineProperty(PDFJS, 'isLittleEndian', { + configurable: true, + get: function PDFJS_isLittleEndian() { + return shadow(PDFJS, 'isLittleEndian', isLittleEndian()); + } +}); + + // Lazy test if the userAgent support CanvasTypedArrays +function hasCanvasTypedArrays() { + var canvas = document.createElement('canvas'); + canvas.width = canvas.height = 1; + var ctx = canvas.getContext('2d'); + var imageData = ctx.createImageData(1, 1); + return (typeof imageData.data.buffer !== 'undefined'); +} + +Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', { + configurable: true, + get: function PDFJS_hasCanvasTypedArrays() { + return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays()); + } +}); + +var Uint32ArrayView = (function Uint32ArrayViewClosure() { + + function Uint32ArrayView(buffer, length) { + this.buffer = buffer; + this.byteLength = buffer.length; + this.length = length === undefined ? (this.byteLength >> 2) : length; + ensureUint32ArrayViewProps(this.length); + } + Uint32ArrayView.prototype = Object.create(null); + + var uint32ArrayViewSetters = 0; + function createUint32ArrayProp(index) { + return { + get: function () { + var buffer = this.buffer, offset = index << 2; + return (buffer[offset] | (buffer[offset + 1] << 8) | + (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0; + }, + set: function (value) { + var buffer = this.buffer, offset = index << 2; + buffer[offset] = value & 255; + buffer[offset + 1] = (value >> 8) & 255; + buffer[offset + 2] = (value >> 16) & 255; + buffer[offset + 3] = (value >>> 24) & 255; + } + }; + } + + function ensureUint32ArrayViewProps(length) { + while (uint32ArrayViewSetters < length) { + Object.defineProperty(Uint32ArrayView.prototype, + uint32ArrayViewSetters, + createUint32ArrayProp(uint32ArrayViewSetters)); + uint32ArrayViewSetters++; + } + } + + return Uint32ArrayView; +})(); + +exports.Uint32ArrayView = Uint32ArrayView; + +var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0]; + +var Util = PDFJS.Util = (function UtilClosure() { + function Util() {} + + var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')']; + + // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids + // creating many intermediate strings. + Util.makeCssRgb = function Util_makeCssRgb(r, g, b) { + rgbBuf[1] = r; + rgbBuf[3] = g; + rgbBuf[5] = b; + return rgbBuf.join(''); + }; + + // Concatenates two transformation matrices together and returns the result. + Util.transform = function Util_transform(m1, m2) { + return [ + m1[0] * m2[0] + m1[2] * m2[1], + m1[1] * m2[0] + m1[3] * m2[1], + m1[0] * m2[2] + m1[2] * m2[3], + m1[1] * m2[2] + m1[3] * m2[3], + m1[0] * m2[4] + m1[2] * m2[5] + m1[4], + m1[1] * m2[4] + m1[3] * m2[5] + m1[5] + ]; + }; + + // For 2d affine transforms + Util.applyTransform = function Util_applyTransform(p, m) { + var xt = p[0] * m[0] + p[1] * m[2] + m[4]; + var yt = p[0] * m[1] + p[1] * m[3] + m[5]; + return [xt, yt]; + }; + + Util.applyInverseTransform = function Util_applyInverseTransform(p, m) { + var d = m[0] * m[3] - m[1] * m[2]; + var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d; + var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d; + return [xt, yt]; + }; + + // Applies the transform to the rectangle and finds the minimum axially + // aligned bounding box. + Util.getAxialAlignedBoundingBox = + function Util_getAxialAlignedBoundingBox(r, m) { + + var p1 = Util.applyTransform(r, m); + var p2 = Util.applyTransform(r.slice(2, 4), m); + var p3 = Util.applyTransform([r[0], r[3]], m); + var p4 = Util.applyTransform([r[2], r[1]], m); + return [ + Math.min(p1[0], p2[0], p3[0], p4[0]), + Math.min(p1[1], p2[1], p3[1], p4[1]), + Math.max(p1[0], p2[0], p3[0], p4[0]), + Math.max(p1[1], p2[1], p3[1], p4[1]) + ]; + }; + + Util.inverseTransform = function Util_inverseTransform(m) { + var d = m[0] * m[3] - m[1] * m[2]; + return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, + (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d]; + }; + + // Apply a generic 3d matrix M on a 3-vector v: + // | a b c | | X | + // | d e f | x | Y | + // | g h i | | Z | + // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i], + // with v as [X,Y,Z] + Util.apply3dTransform = function Util_apply3dTransform(m, v) { + return [ + m[0] * v[0] + m[1] * v[1] + m[2] * v[2], + m[3] * v[0] + m[4] * v[1] + m[5] * v[2], + m[6] * v[0] + m[7] * v[1] + m[8] * v[2] + ]; + }; + + // This calculation uses Singular Value Decomposition. + // The SVD can be represented with formula A = USV. We are interested in the + // matrix S here because it represents the scale values. + Util.singularValueDecompose2dScale = + function Util_singularValueDecompose2dScale(m) { + + var transpose = [m[0], m[2], m[1], m[3]]; + + // Multiply matrix m with its transpose. + var a = m[0] * transpose[0] + m[1] * transpose[2]; + var b = m[0] * transpose[1] + m[1] * transpose[3]; + var c = m[2] * transpose[0] + m[3] * transpose[2]; + var d = m[2] * transpose[1] + m[3] * transpose[3]; + + // Solve the second degree polynomial to get roots. + var first = (a + d) / 2; + var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2; + var sx = first + second || 1; + var sy = first - second || 1; + + // Scale values are the square roots of the eigenvalues. + return [Math.sqrt(sx), Math.sqrt(sy)]; + }; + + // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2) + // For coordinate systems whose origin lies in the bottom-left, this + // means normalization to (BL,TR) ordering. For systems with origin in the + // top-left, this means (TL,BR) ordering. + Util.normalizeRect = function Util_normalizeRect(rect) { + var r = rect.slice(0); // clone rect + if (rect[0] > rect[2]) { + r[0] = rect[2]; + r[2] = rect[0]; + } + if (rect[1] > rect[3]) { + r[1] = rect[3]; + r[3] = rect[1]; + } + return r; + }; + + // Returns a rectangle [x1, y1, x2, y2] corresponding to the + // intersection of rect1 and rect2. If no intersection, returns 'false' + // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2] + Util.intersect = function Util_intersect(rect1, rect2) { + function compare(a, b) { + return a - b; + } + + // Order points along the axes + var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare), + orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare), + result = []; + + rect1 = Util.normalizeRect(rect1); + rect2 = Util.normalizeRect(rect2); + + // X: first and second points belong to different rectangles? + if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) || + (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) { + // Intersection must be between second and third points + result[0] = orderedX[1]; + result[2] = orderedX[2]; + } else { + return false; + } + + // Y: first and second points belong to different rectangles? + if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) || + (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) { + // Intersection must be between second and third points + result[1] = orderedY[1]; + result[3] = orderedY[2]; + } else { + return false; + } + + return result; + }; + + Util.sign = function Util_sign(num) { + return num < 0 ? -1 : 1; + }; + + Util.appendToArray = function Util_appendToArray(arr1, arr2) { + Array.prototype.push.apply(arr1, arr2); + }; + + Util.prependToArray = function Util_prependToArray(arr1, arr2) { + Array.prototype.unshift.apply(arr1, arr2); + }; + + Util.extendObj = function extendObj(obj1, obj2) { + for (var key in obj2) { + obj1[key] = obj2[key]; + } + }; + + Util.getInheritableProperty = function Util_getInheritableProperty(dict, + name) { + while (dict && !dict.has(name)) { + dict = dict.get('Parent'); + } + if (!dict) { + return null; + } + return dict.get(name); + }; + + Util.inherit = function Util_inherit(sub, base, prototype) { + sub.prototype = Object.create(base.prototype); + sub.prototype.constructor = sub; + for (var prop in prototype) { + sub.prototype[prop] = prototype[prop]; + } + }; + + Util.loadScript = function Util_loadScript(src, callback) { + var script = document.createElement('script'); + var loaded = false; + script.setAttribute('src', src); + if (callback) { + script.onload = function() { + if (!loaded) { + callback(); + } + loaded = true; + }; + } + document.getElementsByTagName('head')[0].appendChild(script); + }; + + return Util; +})(); + +/** + * PDF page viewport created based on scale, rotation and offset. + * @class + * @alias PDFJS.PageViewport + */ +var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() { + /** + * @constructor + * @private + * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates. + * @param scale {number} scale of the viewport. + * @param rotation {number} rotations of the viewport in degrees. + * @param offsetX {number} offset X + * @param offsetY {number} offset Y + * @param dontFlip {boolean} if true, axis Y will not be flipped. + */ + function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) { + this.viewBox = viewBox; + this.scale = scale; + this.rotation = rotation; + this.offsetX = offsetX; + this.offsetY = offsetY; + + // creating transform to convert pdf coordinate system to the normal + // canvas like coordinates taking in account scale and rotation + var centerX = (viewBox[2] + viewBox[0]) / 2; + var centerY = (viewBox[3] + viewBox[1]) / 2; + var rotateA, rotateB, rotateC, rotateD; + rotation = rotation % 360; + rotation = rotation < 0 ? rotation + 360 : rotation; + switch (rotation) { + case 180: + rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1; + break; + case 90: + rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0; + break; + case 270: + rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0; + break; + //case 0: + default: + rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1; + break; + } + + if (dontFlip) { + rotateC = -rotateC; rotateD = -rotateD; + } + + var offsetCanvasX, offsetCanvasY; + var width, height; + if (rotateA === 0) { + offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX; + offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY; + width = Math.abs(viewBox[3] - viewBox[1]) * scale; + height = Math.abs(viewBox[2] - viewBox[0]) * scale; + } else { + offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX; + offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY; + width = Math.abs(viewBox[2] - viewBox[0]) * scale; + height = Math.abs(viewBox[3] - viewBox[1]) * scale; + } + // creating transform for the following operations: + // translate(-centerX, -centerY), rotate and flip vertically, + // scale, and translate(offsetCanvasX, offsetCanvasY) + this.transform = [ + rotateA * scale, + rotateB * scale, + rotateC * scale, + rotateD * scale, + offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, + offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY + ]; + + this.width = width; + this.height = height; + this.fontScale = scale; + } + PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ { + /** + * Clones viewport with additional properties. + * @param args {Object} (optional) If specified, may contain the 'scale' or + * 'rotation' properties to override the corresponding properties in + * the cloned viewport. + * @returns {PDFJS.PageViewport} Cloned viewport. + */ + clone: function PageViewPort_clone(args) { + args = args || {}; + var scale = 'scale' in args ? args.scale : this.scale; + var rotation = 'rotation' in args ? args.rotation : this.rotation; + return new PageViewport(this.viewBox.slice(), scale, rotation, + this.offsetX, this.offsetY, args.dontFlip); + }, + /** + * Converts PDF point to the viewport coordinates. For examples, useful for + * converting PDF location into canvas pixel coordinates. + * @param x {number} X coordinate. + * @param y {number} Y coordinate. + * @returns {Object} Object that contains 'x' and 'y' properties of the + * point in the viewport coordinate space. + * @see {@link convertToPdfPoint} + * @see {@link convertToViewportRectangle} + */ + convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) { + return Util.applyTransform([x, y], this.transform); + }, + /** + * Converts PDF rectangle to the viewport coordinates. + * @param rect {Array} xMin, yMin, xMax and yMax coordinates. + * @returns {Array} Contains corresponding coordinates of the rectangle + * in the viewport coordinate space. + * @see {@link convertToViewportPoint} + */ + convertToViewportRectangle: + function PageViewport_convertToViewportRectangle(rect) { + var tl = Util.applyTransform([rect[0], rect[1]], this.transform); + var br = Util.applyTransform([rect[2], rect[3]], this.transform); + return [tl[0], tl[1], br[0], br[1]]; + }, + /** + * Converts viewport coordinates to the PDF location. For examples, useful + * for converting canvas pixel location into PDF one. + * @param x {number} X coordinate. + * @param y {number} Y coordinate. + * @returns {Object} Object that contains 'x' and 'y' properties of the + * point in the PDF coordinate space. + * @see {@link convertToViewportPoint} + */ + convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) { + return Util.applyInverseTransform([x, y], this.transform); + } + }; + return PageViewport; +})(); + +var PDFStringTranslateTable = [ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, + 0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C, + 0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160, + 0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC +]; + +function stringToPDFString(str) { + var i, n = str.length, strBuf = []; + if (str[0] === '\xFE' && str[1] === '\xFF') { + // UTF16BE BOM + for (i = 2; i < n; i += 2) { + strBuf.push(String.fromCharCode( + (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))); + } + } else { + for (i = 0; i < n; ++i) { + var code = PDFStringTranslateTable[str.charCodeAt(i)]; + strBuf.push(code ? String.fromCharCode(code) : str.charAt(i)); + } + } + return strBuf.join(''); +} + +function stringToUTF8String(str) { + return decodeURIComponent(escape(str)); +} + +function utf8StringToString(str) { + return unescape(encodeURIComponent(str)); +} + +function isEmptyObj(obj) { + for (var key in obj) { + return false; + } + return true; +} + +function isBool(v) { + return typeof v === 'boolean'; +} + +function isInt(v) { + return typeof v === 'number' && ((v | 0) === v); +} + +function isNum(v) { + return typeof v === 'number'; +} + +function isString(v) { + return typeof v === 'string'; +} + +function isArray(v) { + return v instanceof Array; +} + +function isArrayBuffer(v) { + return typeof v === 'object' && v !== null && v.byteLength !== undefined; +} + +/** + * Promise Capability object. + * + * @typedef {Object} PromiseCapability + * @property {Promise} promise - A promise object. + * @property {function} resolve - Fullfills the promise. + * @property {function} reject - Rejects the promise. + */ + +/** + * Creates a promise capability object. + * @alias PDFJS.createPromiseCapability + * + * @return {PromiseCapability} A capability object contains: + * - a Promise, resolve and reject methods. + */ +function createPromiseCapability() { + var capability = {}; + capability.promise = new Promise(function (resolve, reject) { + capability.resolve = resolve; + capability.reject = reject; + }); + return capability; +} + +PDFJS.createPromiseCapability = createPromiseCapability; + +/** + * Polyfill for Promises: + * The following promise implementation tries to generally implement the + * Promise/A+ spec. Some notable differences from other promise libaries are: + * - There currently isn't a seperate deferred and promise object. + * - Unhandled rejections eventually show an error if they aren't handled. + * + * Based off of the work in: + * https://bugzilla.mozilla.org/show_bug.cgi?id=810490 + */ +(function PromiseClosure() { + if (globalScope.Promise) { + // Promises existing in the DOM/Worker, checking presence of all/resolve + if (typeof globalScope.Promise.all !== 'function') { + globalScope.Promise.all = function (iterable) { + var count = 0, results = [], resolve, reject; + var promise = new globalScope.Promise(function (resolve_, reject_) { + resolve = resolve_; + reject = reject_; + }); + iterable.forEach(function (p, i) { + count++; + p.then(function (result) { + results[i] = result; + count--; + if (count === 0) { + resolve(results); + } + }, reject); + }); + if (count === 0) { + resolve(results); + } + return promise; + }; + } + if (typeof globalScope.Promise.resolve !== 'function') { + globalScope.Promise.resolve = function (value) { + return new globalScope.Promise(function (resolve) { resolve(value); }); + }; + } + if (typeof globalScope.Promise.reject !== 'function') { + globalScope.Promise.reject = function (reason) { + return new globalScope.Promise(function (resolve, reject) { + reject(reason); + }); + }; + } + if (typeof globalScope.Promise.prototype.catch !== 'function') { + globalScope.Promise.prototype.catch = function (onReject) { + return globalScope.Promise.prototype.then(undefined, onReject); + }; + } + return; + } + var STATUS_PENDING = 0; + var STATUS_RESOLVED = 1; + var STATUS_REJECTED = 2; + + // In an attempt to avoid silent exceptions, unhandled rejections are + // tracked and if they aren't handled in a certain amount of time an + // error is logged. + var REJECTION_TIMEOUT = 500; + + var HandlerManager = { + handlers: [], + running: false, + unhandledRejections: [], + pendingRejectionCheck: false, + + scheduleHandlers: function scheduleHandlers(promise) { + if (promise._status === STATUS_PENDING) { + return; + } + + this.handlers = this.handlers.concat(promise._handlers); + promise._handlers = []; + + if (this.running) { + return; + } + this.running = true; + + setTimeout(this.runHandlers.bind(this), 0); + }, + + runHandlers: function runHandlers() { + var RUN_TIMEOUT = 1; // ms + var timeoutAt = Date.now() + RUN_TIMEOUT; + while (this.handlers.length > 0) { + var handler = this.handlers.shift(); + + var nextStatus = handler.thisPromise._status; + var nextValue = handler.thisPromise._value; + + try { + if (nextStatus === STATUS_RESOLVED) { + if (typeof handler.onResolve === 'function') { + nextValue = handler.onResolve(nextValue); + } + } else if (typeof handler.onReject === 'function') { + nextValue = handler.onReject(nextValue); + nextStatus = STATUS_RESOLVED; + + if (handler.thisPromise._unhandledRejection) { + this.removeUnhandeledRejection(handler.thisPromise); + } + } + } catch (ex) { + nextStatus = STATUS_REJECTED; + nextValue = ex; + } + + handler.nextPromise._updateStatus(nextStatus, nextValue); + if (Date.now() >= timeoutAt) { + break; + } + } + + if (this.handlers.length > 0) { + setTimeout(this.runHandlers.bind(this), 0); + return; + } + + this.running = false; + }, + + addUnhandledRejection: function addUnhandledRejection(promise) { + this.unhandledRejections.push({ + promise: promise, + time: Date.now() + }); + this.scheduleRejectionCheck(); + }, + + removeUnhandeledRejection: function removeUnhandeledRejection(promise) { + promise._unhandledRejection = false; + for (var i = 0; i < this.unhandledRejections.length; i++) { + if (this.unhandledRejections[i].promise === promise) { + this.unhandledRejections.splice(i); + i--; + } + } + }, + + scheduleRejectionCheck: function scheduleRejectionCheck() { + if (this.pendingRejectionCheck) { + return; + } + this.pendingRejectionCheck = true; + setTimeout(function rejectionCheck() { + this.pendingRejectionCheck = false; + var now = Date.now(); + for (var i = 0; i < this.unhandledRejections.length; i++) { + if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) { + var unhandled = this.unhandledRejections[i].promise._value; + var msg = 'Unhandled rejection: ' + unhandled; + if (unhandled.stack) { + msg += '\n' + unhandled.stack; + } + warn(msg); + this.unhandledRejections.splice(i); + i--; + } + } + if (this.unhandledRejections.length) { + this.scheduleRejectionCheck(); + } + }.bind(this), REJECTION_TIMEOUT); + } + }; + + function Promise(resolver) { + this._status = STATUS_PENDING; + this._handlers = []; + try { + resolver.call(this, this._resolve.bind(this), this._reject.bind(this)); + } catch (e) { + this._reject(e); + } + } + /** + * Builds a promise that is resolved when all the passed in promises are + * resolved. + * @param {array} array of data and/or promises to wait for. + * @return {Promise} New dependant promise. + */ + Promise.all = function Promise_all(promises) { + var resolveAll, rejectAll; + var deferred = new Promise(function (resolve, reject) { + resolveAll = resolve; + rejectAll = reject; + }); + var unresolved = promises.length; + var results = []; + if (unresolved === 0) { + resolveAll(results); + return deferred; + } + function reject(reason) { + if (deferred._status === STATUS_REJECTED) { + return; + } + results = []; + rejectAll(reason); + } + for (var i = 0, ii = promises.length; i < ii; ++i) { + var promise = promises[i]; + var resolve = (function(i) { + return function(value) { + if (deferred._status === STATUS_REJECTED) { + return; + } + results[i] = value; + unresolved--; + if (unresolved === 0) { + resolveAll(results); + } + }; + })(i); + if (Promise.isPromise(promise)) { + promise.then(resolve, reject); + } else { + resolve(promise); + } + } + return deferred; + }; + + /** + * Checks if the value is likely a promise (has a 'then' function). + * @return {boolean} true if value is thenable + */ + Promise.isPromise = function Promise_isPromise(value) { + return value && typeof value.then === 'function'; + }; + + /** + * Creates resolved promise + * @param value resolve value + * @returns {Promise} + */ + Promise.resolve = function Promise_resolve(value) { + return new Promise(function (resolve) { resolve(value); }); + }; + + /** + * Creates rejected promise + * @param reason rejection value + * @returns {Promise} + */ + Promise.reject = function Promise_reject(reason) { + return new Promise(function (resolve, reject) { reject(reason); }); + }; + + Promise.prototype = { + _status: null, + _value: null, + _handlers: null, + _unhandledRejection: null, + + _updateStatus: function Promise__updateStatus(status, value) { + if (this._status === STATUS_RESOLVED || + this._status === STATUS_REJECTED) { + return; + } + + if (status === STATUS_RESOLVED && + Promise.isPromise(value)) { + value.then(this._updateStatus.bind(this, STATUS_RESOLVED), + this._updateStatus.bind(this, STATUS_REJECTED)); + return; + } + + this._status = status; + this._value = value; + + if (status === STATUS_REJECTED && this._handlers.length === 0) { + this._unhandledRejection = true; + HandlerManager.addUnhandledRejection(this); + } + + HandlerManager.scheduleHandlers(this); + }, + + _resolve: function Promise_resolve(value) { + this._updateStatus(STATUS_RESOLVED, value); + }, + + _reject: function Promise_reject(reason) { + this._updateStatus(STATUS_REJECTED, reason); + }, + + then: function Promise_then(onResolve, onReject) { + var nextPromise = new Promise(function (resolve, reject) { + this.resolve = resolve; + this.reject = reject; + }); + this._handlers.push({ + thisPromise: this, + onResolve: onResolve, + onReject: onReject, + nextPromise: nextPromise + }); + HandlerManager.scheduleHandlers(this); + return nextPromise; + }, + + catch: function Promise_catch(onReject) { + return this.then(undefined, onReject); + } + }; + + globalScope.Promise = Promise; +})(); + +var StatTimer = (function StatTimerClosure() { + function rpad(str, pad, length) { + while (str.length < length) { + str += pad; + } + return str; + } + function StatTimer() { + this.started = {}; + this.times = []; + this.enabled = true; + } + StatTimer.prototype = { + time: function StatTimer_time(name) { + if (!this.enabled) { + return; + } + if (name in this.started) { + warn('Timer is already running for ' + name); + } + this.started[name] = Date.now(); + }, + timeEnd: function StatTimer_timeEnd(name) { + if (!this.enabled) { + return; + } + if (!(name in this.started)) { + warn('Timer has not been started for ' + name); + } + this.times.push({ + 'name': name, + 'start': this.started[name], + 'end': Date.now() + }); + // Remove timer from started so it can be called again. + delete this.started[name]; + }, + toString: function StatTimer_toString() { + var i, ii; + var times = this.times; + var out = ''; + // Find the longest name for padding purposes. + var longest = 0; + for (i = 0, ii = times.length; i < ii; ++i) { + var name = times[i]['name']; + if (name.length > longest) { + longest = name.length; + } + } + for (i = 0, ii = times.length; i < ii; ++i) { + var span = times[i]; + var duration = span.end - span.start; + out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n'; + } + return out; + } + }; + return StatTimer; +})(); + +PDFJS.createBlob = function createBlob(data, contentType) { + if (typeof Blob !== 'undefined') { + return new Blob([data], { type: contentType }); + } + // Blob builder is deprecated in FF14 and removed in FF18. + var bb = new MozBlobBuilder(); + bb.append(data); + return bb.getBlob(contentType); +}; + +PDFJS.createObjectURL = (function createObjectURLClosure() { + // Blob/createObjectURL is not available, falling back to data schema. + var digits = + 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; + + return function createObjectURL(data, contentType) { + if (!PDFJS.disableCreateObjectURL && + typeof URL !== 'undefined' && URL.createObjectURL) { + var blob = PDFJS.createBlob(data, contentType); + return URL.createObjectURL(blob); + } + + var buffer = 'data:' + contentType + ';base64,'; + for (var i = 0, ii = data.length; i < ii; i += 3) { + var b1 = data[i] & 0xFF; + var b2 = data[i + 1] & 0xFF; + var b3 = data[i + 2] & 0xFF; + var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4); + var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64; + var d4 = i + 2 < ii ? (b3 & 0x3F) : 64; + buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4]; + } + return buffer; + }; +})(); + +function MessageHandler(sourceName, targetName, comObj) { + this.sourceName = sourceName; + this.targetName = targetName; + this.comObj = comObj; + this.callbackIndex = 1; + this.postMessageTransfers = true; + var callbacksCapabilities = this.callbacksCapabilities = {}; + var ah = this.actionHandler = {}; + + this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) { + var data = event.data; + if (data.targetName !== this.sourceName) { + return; + } + if (data.isReply) { + var callbackId = data.callbackId; + if (data.callbackId in callbacksCapabilities) { + var callback = callbacksCapabilities[callbackId]; + delete callbacksCapabilities[callbackId]; + if ('error' in data) { + callback.reject(data.error); + } else { + callback.resolve(data.data); + } + } else { + error('Cannot resolve callback ' + callbackId); + } + } else if (data.action in ah) { + var action = ah[data.action]; + if (data.callbackId) { + var sourceName = this.sourceName; + var targetName = data.sourceName; + Promise.resolve().then(function () { + return action[0].call(action[1], data.data); + }).then(function (result) { + comObj.postMessage({ + sourceName: sourceName, + targetName: targetName, + isReply: true, + callbackId: data.callbackId, + data: result + }); + }, function (reason) { + if (reason instanceof Error) { + // Serialize error to avoid "DataCloneError" + reason = reason + ''; + } + comObj.postMessage({ + sourceName: sourceName, + targetName: targetName, + isReply: true, + callbackId: data.callbackId, + error: reason + }); + }); + } else { + action[0].call(action[1], data.data); + } + } else { + error('Unknown action from worker: ' + data.action); + } + }.bind(this); + comObj.addEventListener('message', this._onComObjOnMessage); +} + +MessageHandler.prototype = { + on: function messageHandlerOn(actionName, handler, scope) { + var ah = this.actionHandler; + if (ah[actionName]) { + error('There is already an actionName called "' + actionName + '"'); + } + ah[actionName] = [handler, scope]; + }, + /** + * Sends a message to the comObj to invoke the action with the supplied data. + * @param {String} actionName Action to call. + * @param {JSON} data JSON data to send. + * @param {Array} [transfers] Optional list of transfers/ArrayBuffers + */ + send: function messageHandlerSend(actionName, data, transfers) { + var message = { + sourceName: this.sourceName, + targetName: this.targetName, + action: actionName, + data: data + }; + this.postMessage(message, transfers); + }, + /** + * Sends a message to the comObj to invoke the action with the supplied data. + * Expects that other side will callback with the response. + * @param {String} actionName Action to call. + * @param {JSON} data JSON data to send. + * @param {Array} [transfers] Optional list of transfers/ArrayBuffers. + * @returns {Promise} Promise to be resolved with response data. + */ + sendWithPromise: + function messageHandlerSendWithPromise(actionName, data, transfers) { + var callbackId = this.callbackIndex++; + var message = { + sourceName: this.sourceName, + targetName: this.targetName, + action: actionName, + data: data, + callbackId: callbackId + }; + var capability = createPromiseCapability(); + this.callbacksCapabilities[callbackId] = capability; + try { + this.postMessage(message, transfers); + } catch (e) { + capability.reject(e); + } + return capability.promise; + }, + /** + * Sends raw message to the comObj. + * @private + * @param message {Object} Raw message. + * @param transfers List of transfers/ArrayBuffers, or undefined. + */ + postMessage: function (message, transfers) { + if (transfers && this.postMessageTransfers) { + this.comObj.postMessage(message, transfers); + } else { + this.comObj.postMessage(message); + } + }, + + destroy: function () { + this.comObj.removeEventListener('message', this._onComObjOnMessage); + } +}; + +function loadJpegStream(id, imageUrl, objs) { + var img = new Image(); + img.onload = (function loadJpegStream_onloadClosure() { + objs.resolve(id, img); + }); + img.onerror = (function loadJpegStream_onerrorClosure() { + objs.resolve(id, null); + warn('Error during JPEG image loading'); + }); + img.src = imageUrl; +} + +exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX; +exports.IDENTITY_MATRIX = IDENTITY_MATRIX; +exports.OPS = OPS; +exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES; +exports.AnnotationBorderStyleType = AnnotationBorderStyleType; +exports.AnnotationFlag = AnnotationFlag; +exports.AnnotationType = AnnotationType; +exports.FontType = FontType; +exports.ImageKind = ImageKind; +exports.InvalidPDFException = InvalidPDFException; +exports.LinkTarget = LinkTarget; +exports.LinkTargetStringMap = LinkTargetStringMap; +exports.MessageHandler = MessageHandler; +exports.MissingDataException = MissingDataException; +exports.MissingPDFException = MissingPDFException; +exports.NotImplementedException = NotImplementedException; +exports.PasswordException = PasswordException; +exports.PasswordResponses = PasswordResponses; +exports.StatTimer = StatTimer; +exports.StreamType = StreamType; +exports.TextRenderingMode = TextRenderingMode; +exports.UnexpectedResponseException = UnexpectedResponseException; +exports.UnknownErrorException = UnknownErrorException; +exports.Util = Util; +exports.XRefParseException = XRefParseException; +exports.assert = assert; +exports.bytesToString = bytesToString; +exports.combineUrl = combineUrl; +exports.createPromiseCapability = createPromiseCapability; +exports.deprecated = deprecated; +exports.error = error; +exports.info = info; +exports.isArray = isArray; +exports.isArrayBuffer = isArrayBuffer; +exports.isBool = isBool; +exports.isEmptyObj = isEmptyObj; +exports.isExternalLinkTargetSet = isExternalLinkTargetSet; +exports.isInt = isInt; +exports.isNum = isNum; +exports.isString = isString; +exports.isValidUrl = isValidUrl; +exports.loadJpegStream = loadJpegStream; +exports.log2 = log2; +exports.readInt8 = readInt8; +exports.readUint16 = readUint16; +exports.readUint32 = readUint32; +exports.shadow = shadow; +exports.string32 = string32; +exports.stringToBytes = stringToBytes; +exports.stringToPDFString = stringToPDFString; +exports.stringToUTF8String = stringToUTF8String; +exports.utf8StringToString = utf8StringToString; +exports.warn = warn; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreChunkedStream = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { + +var MissingDataException = sharedUtil.MissingDataException; +var assert = sharedUtil.assert; +var createPromiseCapability = sharedUtil.createPromiseCapability; +var isInt = sharedUtil.isInt; +var isEmptyObj = sharedUtil.isEmptyObj; + +var ChunkedStream = (function ChunkedStreamClosure() { + function ChunkedStream(length, chunkSize, manager) { + this.bytes = new Uint8Array(length); + this.start = 0; + this.pos = 0; + this.end = length; + this.chunkSize = chunkSize; + this.loadedChunks = []; + this.numChunksLoaded = 0; + this.numChunks = Math.ceil(length / chunkSize); + this.manager = manager; + this.progressiveDataLength = 0; + this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache + } + + // required methods for a stream. if a particular stream does not + // implement these, an error should be thrown + ChunkedStream.prototype = { + + getMissingChunks: function ChunkedStream_getMissingChunks() { + var chunks = []; + for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { + if (!this.loadedChunks[chunk]) { + chunks.push(chunk); + } + } + return chunks; + }, + + getBaseStreams: function ChunkedStream_getBaseStreams() { + return [this]; + }, + + allChunksLoaded: function ChunkedStream_allChunksLoaded() { + return this.numChunksLoaded === this.numChunks; + }, + + onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { + var end = begin + chunk.byteLength; + + assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); + // Using this.length is inaccurate here since this.start can be moved + // See ChunkedStream.moveStart() + var length = this.bytes.length; + assert(end % this.chunkSize === 0 || end === length, + 'Bad end offset: ' + end); + + this.bytes.set(new Uint8Array(chunk), begin); + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + var curChunk; + + for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { + if (!this.loadedChunks[curChunk]) { + this.loadedChunks[curChunk] = true; + ++this.numChunksLoaded; + } + } + }, + + onReceiveProgressiveData: + function ChunkedStream_onReceiveProgressiveData(data) { + var position = this.progressiveDataLength; + var beginChunk = Math.floor(position / this.chunkSize); + + this.bytes.set(new Uint8Array(data), position); + position += data.byteLength; + this.progressiveDataLength = position; + var endChunk = position >= this.end ? this.numChunks : + Math.floor(position / this.chunkSize); + var curChunk; + for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { + if (!this.loadedChunks[curChunk]) { + this.loadedChunks[curChunk] = true; + ++this.numChunksLoaded; + } + } + }, + + ensureByte: function ChunkedStream_ensureByte(pos) { + var chunk = Math.floor(pos / this.chunkSize); + if (chunk === this.lastSuccessfulEnsureByteChunk) { + return; + } + + if (!this.loadedChunks[chunk]) { + throw new MissingDataException(pos, pos + 1); + } + this.lastSuccessfulEnsureByteChunk = chunk; + }, + + ensureRange: function ChunkedStream_ensureRange(begin, end) { + if (begin >= end) { + return; + } + + if (end <= this.progressiveDataLength) { + return; + } + + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(begin / chunkSize); + var endChunk = Math.floor((end - 1) / chunkSize) + 1; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!this.loadedChunks[chunk]) { + throw new MissingDataException(begin, end); + } + } + }, + + nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { + var chunk, numChunks = this.numChunks; + for (var i = 0; i < numChunks; ++i) { + chunk = (beginChunk + i) % numChunks; // Wrap around to beginning + if (!this.loadedChunks[chunk]) { + return chunk; + } + } + return null; + }, + + hasChunk: function ChunkedStream_hasChunk(chunk) { + return !!this.loadedChunks[chunk]; + }, + + get length() { + return this.end - this.start; + }, + + get isEmpty() { + return this.length === 0; + }, + + getByte: function ChunkedStream_getByte() { + var pos = this.pos; + if (pos >= this.end) { + return -1; + } + this.ensureByte(pos); + return this.bytes[this.pos++]; + }, + + getUint16: function ChunkedStream_getUint16() { + var b0 = this.getByte(); + var b1 = this.getByte(); + if (b0 === -1 || b1 === -1) { + return -1; + } + return (b0 << 8) + b1; + }, + + getInt32: function ChunkedStream_getInt32() { + var b0 = this.getByte(); + var b1 = this.getByte(); + var b2 = this.getByte(); + var b3 = this.getByte(); + return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + }, + + // returns subarray of original buffer + // should only be read + getBytes: function ChunkedStream_getBytes(length) { + var bytes = this.bytes; + var pos = this.pos; + var strEnd = this.end; + + if (!length) { + this.ensureRange(pos, strEnd); + return bytes.subarray(pos, strEnd); + } + + var end = pos + length; + if (end > strEnd) { + end = strEnd; + } + this.ensureRange(pos, end); + + this.pos = end; + return bytes.subarray(pos, end); + }, + + peekByte: function ChunkedStream_peekByte() { + var peekedByte = this.getByte(); + this.pos--; + return peekedByte; + }, + + peekBytes: function ChunkedStream_peekBytes(length) { + var bytes = this.getBytes(length); + this.pos -= bytes.length; + return bytes; + }, + + getByteRange: function ChunkedStream_getBytes(begin, end) { + this.ensureRange(begin, end); + return this.bytes.subarray(begin, end); + }, + + skip: function ChunkedStream_skip(n) { + if (!n) { + n = 1; + } + this.pos += n; + }, + + reset: function ChunkedStream_reset() { + this.pos = this.start; + }, + + moveStart: function ChunkedStream_moveStart() { + this.start = this.pos; + }, + + makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { + this.ensureRange(start, start + length); + + function ChunkedStreamSubstream() {} + ChunkedStreamSubstream.prototype = Object.create(this); + ChunkedStreamSubstream.prototype.getMissingChunks = function() { + var chunkSize = this.chunkSize; + var beginChunk = Math.floor(this.start / chunkSize); + var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; + var missingChunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (!this.loadedChunks[chunk]) { + missingChunks.push(chunk); + } + } + return missingChunks; + }; + var subStream = new ChunkedStreamSubstream(); + subStream.pos = subStream.start = start; + subStream.end = start + length || this.end; + subStream.dict = dict; + return subStream; + }, + + isStream: true + }; + + return ChunkedStream; +})(); + +var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { + + function ChunkedStreamManager(length, chunkSize, url, args) { + this.stream = new ChunkedStream(length, chunkSize, this); + this.length = length; + this.chunkSize = chunkSize; + this.url = url; + this.disableAutoFetch = args.disableAutoFetch; + var msgHandler = this.msgHandler = args.msgHandler; + + if (args.chunkedViewerLoading) { + msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); + msgHandler.on('OnDataProgress', this.onProgress.bind(this)); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + msgHandler.send('RequestDataRange', { begin: begin, end: end }); + }; + } else { + + var getXhr = function getXhr() { + return new XMLHttpRequest(); + }; + this.networkManager = new NetworkManager(this.url, { + getXhr: getXhr, + httpHeaders: args.httpHeaders, + withCredentials: args.withCredentials + }); + this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { + this.networkManager.requestRange(begin, end, { + onDone: this.onReceiveData.bind(this), + onProgress: this.onProgress.bind(this) + }); + }; + } + + this.currRequestId = 0; + + this.chunksNeededByRequest = {}; + this.requestsByChunk = {}; + this.promisesByRequest = {}; + this.progressiveDataLength = 0; + + this._loadedStreamCapability = createPromiseCapability(); + + if (args.initialData) { + this.onReceiveData({chunk: args.initialData}); + } + } + + ChunkedStreamManager.prototype = { + onLoadedStream: function ChunkedStreamManager_getLoadedStream() { + return this._loadedStreamCapability.promise; + }, + + // Get all the chunks that are not yet loaded and groups them into + // contiguous ranges to load in as few requests as possible + requestAllChunks: function ChunkedStreamManager_requestAllChunks() { + var missingChunks = this.stream.getMissingChunks(); + this._requestChunks(missingChunks); + return this._loadedStreamCapability.promise; + }, + + _requestChunks: function ChunkedStreamManager_requestChunks(chunks) { + var requestId = this.currRequestId++; + + var chunksNeeded; + var i, ii; + this.chunksNeededByRequest[requestId] = chunksNeeded = {}; + for (i = 0, ii = chunks.length; i < ii; i++) { + if (!this.stream.hasChunk(chunks[i])) { + chunksNeeded[chunks[i]] = true; + } + } + + if (isEmptyObj(chunksNeeded)) { + return Promise.resolve(); + } + + var capability = createPromiseCapability(); + this.promisesByRequest[requestId] = capability; + + var chunksToRequest = []; + for (var chunk in chunksNeeded) { + chunk = chunk | 0; + if (!(chunk in this.requestsByChunk)) { + this.requestsByChunk[chunk] = []; + chunksToRequest.push(chunk); + } + this.requestsByChunk[chunk].push(requestId); + } + + if (!chunksToRequest.length) { + return capability.promise; + } + + var groupedChunksToRequest = this.groupChunks(chunksToRequest); + + for (i = 0; i < groupedChunksToRequest.length; ++i) { + var groupedChunk = groupedChunksToRequest[i]; + var begin = groupedChunk.beginChunk * this.chunkSize; + var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); + this.sendRequest(begin, end); + } + + return capability.promise; + }, + + getStream: function ChunkedStreamManager_getStream() { + return this.stream; + }, + + // Loads any chunks in the requested range that are not yet loaded + requestRange: function ChunkedStreamManager_requestRange(begin, end) { + + end = Math.min(end, this.length); + + var beginChunk = this.getBeginChunk(begin); + var endChunk = this.getEndChunk(end); + + var chunks = []; + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + chunks.push(chunk); + } + + return this._requestChunks(chunks); + }, + + requestRanges: function ChunkedStreamManager_requestRanges(ranges) { + ranges = ranges || []; + var chunksToRequest = []; + + for (var i = 0; i < ranges.length; i++) { + var beginChunk = this.getBeginChunk(ranges[i].begin); + var endChunk = this.getEndChunk(ranges[i].end); + for (var chunk = beginChunk; chunk < endChunk; ++chunk) { + if (chunksToRequest.indexOf(chunk) < 0) { + chunksToRequest.push(chunk); + } + } + } + + chunksToRequest.sort(function(a, b) { return a - b; }); + return this._requestChunks(chunksToRequest); + }, + + // Groups a sorted array of chunks into as few contiguous larger + // chunks as possible + groupChunks: function ChunkedStreamManager_groupChunks(chunks) { + var groupedChunks = []; + var beginChunk = -1; + var prevChunk = -1; + for (var i = 0; i < chunks.length; ++i) { + var chunk = chunks[i]; + + if (beginChunk < 0) { + beginChunk = chunk; + } + + if (prevChunk >= 0 && prevChunk + 1 !== chunk) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: prevChunk + 1 }); + beginChunk = chunk; + } + if (i + 1 === chunks.length) { + groupedChunks.push({ beginChunk: beginChunk, + endChunk: chunk + 1 }); + } + + prevChunk = chunk; + } + return groupedChunks; + }, + + onProgress: function ChunkedStreamManager_onProgress(args) { + var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + + args.loaded); + this.msgHandler.send('DocProgress', { + loaded: bytesLoaded, + total: this.length + }); + }, + + onReceiveData: function ChunkedStreamManager_onReceiveData(args) { + var chunk = args.chunk; + var isProgressive = args.begin === undefined; + var begin = isProgressive ? this.progressiveDataLength : args.begin; + var end = begin + chunk.byteLength; + + var beginChunk = Math.floor(begin / this.chunkSize); + var endChunk = end < this.length ? Math.floor(end / this.chunkSize) : + Math.ceil(end / this.chunkSize); + + if (isProgressive) { + this.stream.onReceiveProgressiveData(chunk); + this.progressiveDataLength = end; + } else { + this.stream.onReceiveData(begin, chunk); + } + + if (this.stream.allChunksLoaded()) { + this._loadedStreamCapability.resolve(this.stream); + } + + var loadedRequests = []; + var i, requestId; + for (chunk = beginChunk; chunk < endChunk; ++chunk) { + // The server might return more chunks than requested + var requestIds = this.requestsByChunk[chunk] || []; + delete this.requestsByChunk[chunk]; + + for (i = 0; i < requestIds.length; ++i) { + requestId = requestIds[i]; + var chunksNeeded = this.chunksNeededByRequest[requestId]; + if (chunk in chunksNeeded) { + delete chunksNeeded[chunk]; + } + + if (!isEmptyObj(chunksNeeded)) { + continue; + } + + loadedRequests.push(requestId); + } + } + + // If there are no pending requests, automatically fetch the next + // unfetched chunk of the PDF + if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { + var nextEmptyChunk; + if (this.stream.numChunksLoaded === 1) { + // This is a special optimization so that after fetching the first + // chunk, rather than fetching the second chunk, we fetch the last + // chunk. + var lastChunk = this.stream.numChunks - 1; + if (!this.stream.hasChunk(lastChunk)) { + nextEmptyChunk = lastChunk; + } + } else { + nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); + } + if (isInt(nextEmptyChunk)) { + this._requestChunks([nextEmptyChunk]); + } + } + + for (i = 0; i < loadedRequests.length; ++i) { + requestId = loadedRequests[i]; + var capability = this.promisesByRequest[requestId]; + delete this.promisesByRequest[requestId]; + capability.resolve(); + } + + this.msgHandler.send('DocProgress', { + loaded: this.stream.numChunksLoaded * this.chunkSize, + total: this.length + }); + }, + + onError: function ChunkedStreamManager_onError(err) { + this._loadedStreamCapability.reject(err); + }, + + getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { + var chunk = Math.floor(begin / this.chunkSize); + return chunk; + }, + + getEndChunk: function ChunkedStreamManager_getEndChunk(end) { + var chunk = Math.floor((end - 1) / this.chunkSize) + 1; + return chunk; + }, + + abort: function ChunkedStreamManager_abort() { + if (this.networkManager) { + this.networkManager.abortAllRequests(); + } + for(var requestId in this.promisesByRequest) { + var capability = this.promisesByRequest[requestId]; + capability.reject(new Error('Request was aborted')); + } + } + }; + + return ChunkedStreamManager; +})(); + +exports.ChunkedStream = ChunkedStream; +exports.ChunkedStreamManager = ChunkedStreamManager; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreJbig2 = {}), root.pdfjsSharedUtil, + root.pdfjsCoreArithmeticDecoder); + } +}(this, function (exports, sharedUtil, coreArithmeticDecoder) { + +var error = sharedUtil.error; +var log2 = sharedUtil.log2; +var readInt8 = sharedUtil.readInt8; +var readUint16 = sharedUtil.readUint16; +var readUint32 = sharedUtil.readUint32; +var shadow = sharedUtil.shadow; +var ArithmeticDecoder = coreArithmeticDecoder.ArithmeticDecoder; + +var Jbig2Image = (function Jbig2ImageClosure() { + // Utility data structures + function ContextCache() {} + + ContextCache.prototype = { + getContexts: function(id) { + if (id in this) { + return this[id]; + } + return (this[id] = new Int8Array(1 << 16)); + } + }; + + function DecodingContext(data, start, end) { + this.data = data; + this.start = start; + this.end = end; + } + + DecodingContext.prototype = { + get decoder() { + var decoder = new ArithmeticDecoder(this.data, this.start, this.end); + return shadow(this, 'decoder', decoder); + }, + get contextCache() { + var cache = new ContextCache(); + return shadow(this, 'contextCache', cache); + } + }; + + // Annex A. Arithmetic Integer Decoding Procedure + // A.2 Procedure for decoding values + function decodeInteger(contextCache, procedure, decoder) { + var contexts = contextCache.getContexts(procedure); + var prev = 1; + + function readBits(length) { + var v = 0; + for (var i = 0; i < length; i++) { + var bit = decoder.readBit(contexts, prev); + prev = (prev < 256 ? (prev << 1) | bit : + (((prev << 1) | bit) & 511) | 256); + v = (v << 1) | bit; + } + return v >>> 0; + } + + var sign = readBits(1); + var value = readBits(1) ? + (readBits(1) ? + (readBits(1) ? + (readBits(1) ? + (readBits(1) ? + (readBits(32) + 4436) : + readBits(12) + 340) : + readBits(8) + 84) : + readBits(6) + 20) : + readBits(4) + 4) : + readBits(2); + return (sign === 0 ? value : (value > 0 ? -value : null)); + } + + // A.3 The IAID decoding procedure + function decodeIAID(contextCache, decoder, codeLength) { + var contexts = contextCache.getContexts('IAID'); + + var prev = 1; + for (var i = 0; i < codeLength; i++) { + var bit = decoder.readBit(contexts, prev); + prev = (prev << 1) | bit; + } + if (codeLength < 31) { + return prev & ((1 << codeLength) - 1); + } + return prev & 0x7FFFFFFF; + } + + // 7.3 Segment types + var SegmentTypes = [ + 'SymbolDictionary', null, null, null, 'IntermediateTextRegion', null, + 'ImmediateTextRegion', 'ImmediateLosslessTextRegion', null, null, null, + null, null, null, null, null, 'patternDictionary', null, null, null, + 'IntermediateHalftoneRegion', null, 'ImmediateHalftoneRegion', + 'ImmediateLosslessHalftoneRegion', null, null, null, null, null, null, null, + null, null, null, null, null, 'IntermediateGenericRegion', null, + 'ImmediateGenericRegion', 'ImmediateLosslessGenericRegion', + 'IntermediateGenericRefinementRegion', null, + 'ImmediateGenericRefinementRegion', + 'ImmediateLosslessGenericRefinementRegion', null, null, null, null, + 'PageInformation', 'EndOfPage', 'EndOfStripe', 'EndOfFile', 'Profiles', + 'Tables', null, null, null, null, null, null, null, null, + 'Extension' + ]; + + var CodingTemplates = [ + [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: -2, y: -1}, + {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: 2, y: -1}, + {x: -4, y: 0}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}], + [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: 2, y: -2}, + {x: -2, y: -1}, {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, + {x: 2, y: -1}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}], + [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: -2, y: -1}, + {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: -2, y: 0}, + {x: -1, y: 0}], + [{x: -3, y: -1}, {x: -2, y: -1}, {x: -1, y: -1}, {x: 0, y: -1}, + {x: 1, y: -1}, {x: -4, y: 0}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}] + ]; + + var RefinementTemplates = [ + { + coding: [{x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}], + reference: [{x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}, {x: 0, y: 0}, + {x: 1, y: 0}, {x: -1, y: 1}, {x: 0, y: 1}, {x: 1, y: 1}] + }, + { + coding: [{x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}], + reference: [{x: 0, y: -1}, {x: -1, y: 0}, {x: 0, y: 0}, {x: 1, y: 0}, + {x: 0, y: 1}, {x: 1, y: 1}] + } + ]; + + // See 6.2.5.7 Decoding the bitmap. + var ReusedContexts = [ + 0x9B25, // 10011 0110010 0101 + 0x0795, // 0011 110010 101 + 0x00E5, // 001 11001 01 + 0x0195 // 011001 0101 + ]; + + var RefinementReusedContexts = [ + 0x0020, // '000' + '0' (coding) + '00010000' + '0' (reference) + 0x0008 // '0000' + '001000' + ]; + + function decodeBitmapTemplate0(width, height, decodingContext) { + var decoder = decodingContext.decoder; + var contexts = decodingContext.contextCache.getContexts('GB'); + var contextLabel, i, j, pixel, row, row1, row2, bitmap = []; + + // ...ooooo.... + // ..ooooooo... Context template for current pixel (X) + // .ooooX...... (concatenate values of 'o'-pixels to get contextLabel) + var OLD_PIXEL_MASK = 0x7BF7; // 01111 0111111 0111 + + for (i = 0; i < height; i++) { + row = bitmap[i] = new Uint8Array(width); + row1 = (i < 1) ? row : bitmap[i - 1]; + row2 = (i < 2) ? row : bitmap[i - 2]; + + // At the beginning of each row: + // Fill contextLabel with pixels that are above/right of (X) + contextLabel = (row2[0] << 13) | (row2[1] << 12) | (row2[2] << 11) | + (row1[0] << 7) | (row1[1] << 6) | (row1[2] << 5) | + (row1[3] << 4); + + for (j = 0; j < width; j++) { + row[j] = pixel = decoder.readBit(contexts, contextLabel); + + // At each pixel: Clear contextLabel pixels that are shifted + // out of the context, then add new ones. + contextLabel = ((contextLabel & OLD_PIXEL_MASK) << 1) | + (j + 3 < width ? row2[j + 3] << 11 : 0) | + (j + 4 < width ? row1[j + 4] << 4 : 0) | pixel; + } + } + + return bitmap; + } + + // 6.2 Generic Region Decoding Procedure + function decodeBitmap(mmr, width, height, templateIndex, prediction, skip, at, + decodingContext) { + if (mmr) { + error('JBIG2 error: MMR encoding is not supported'); + } + + // Use optimized version for the most common case + if (templateIndex === 0 && !skip && !prediction && at.length === 4 && + at[0].x === 3 && at[0].y === -1 && at[1].x === -3 && at[1].y === -1 && + at[2].x === 2 && at[2].y === -2 && at[3].x === -2 && at[3].y === -2) { + return decodeBitmapTemplate0(width, height, decodingContext); + } + + var useskip = !!skip; + var template = CodingTemplates[templateIndex].concat(at); + + // Sorting is non-standard, and it is not required. But sorting increases + // the number of template bits that can be reused from the previous + // contextLabel in the main loop. + template.sort(function (a, b) { + return (a.y - b.y) || (a.x - b.x); + }); + + var templateLength = template.length; + var templateX = new Int8Array(templateLength); + var templateY = new Int8Array(templateLength); + var changingTemplateEntries = []; + var reuseMask = 0, minX = 0, maxX = 0, minY = 0; + var c, k; + + for (k = 0; k < templateLength; k++) { + templateX[k] = template[k].x; + templateY[k] = template[k].y; + minX = Math.min(minX, template[k].x); + maxX = Math.max(maxX, template[k].x); + minY = Math.min(minY, template[k].y); + // Check if the template pixel appears in two consecutive context labels, + // so it can be reused. Otherwise, we add it to the list of changing + // template entries. + if (k < templateLength - 1 && + template[k].y === template[k + 1].y && + template[k].x === template[k + 1].x - 1) { + reuseMask |= 1 << (templateLength - 1 - k); + } else { + changingTemplateEntries.push(k); + } + } + var changingEntriesLength = changingTemplateEntries.length; + + var changingTemplateX = new Int8Array(changingEntriesLength); + var changingTemplateY = new Int8Array(changingEntriesLength); + var changingTemplateBit = new Uint16Array(changingEntriesLength); + for (c = 0; c < changingEntriesLength; c++) { + k = changingTemplateEntries[c]; + changingTemplateX[c] = template[k].x; + changingTemplateY[c] = template[k].y; + changingTemplateBit[c] = 1 << (templateLength - 1 - k); + } + + // Get the safe bounding box edges from the width, height, minX, maxX, minY + var sbb_left = -minX; + var sbb_top = -minY; + var sbb_right = width - maxX; + + var pseudoPixelContext = ReusedContexts[templateIndex]; + var row = new Uint8Array(width); + var bitmap = []; + + var decoder = decodingContext.decoder; + var contexts = decodingContext.contextCache.getContexts('GB'); + + var ltp = 0, j, i0, j0, contextLabel = 0, bit, shift; + for (var i = 0; i < height; i++) { + if (prediction) { + var sltp = decoder.readBit(contexts, pseudoPixelContext); + ltp ^= sltp; + if (ltp) { + bitmap.push(row); // duplicate previous row + continue; + } + } + row = new Uint8Array(row); + bitmap.push(row); + for (j = 0; j < width; j++) { + if (useskip && skip[i][j]) { + row[j] = 0; + continue; + } + // Are we in the middle of a scanline, so we can reuse contextLabel + // bits? + if (j >= sbb_left && j < sbb_right && i >= sbb_top) { + // If yes, we can just shift the bits that are reusable and only + // fetch the remaining ones. + contextLabel = (contextLabel << 1) & reuseMask; + for (k = 0; k < changingEntriesLength; k++) { + i0 = i + changingTemplateY[k]; + j0 = j + changingTemplateX[k]; + bit = bitmap[i0][j0]; + if (bit) { + bit = changingTemplateBit[k]; + contextLabel |= bit; + } + } + } else { + // compute the contextLabel from scratch + contextLabel = 0; + shift = templateLength - 1; + for (k = 0; k < templateLength; k++, shift--) { + j0 = j + templateX[k]; + if (j0 >= 0 && j0 < width) { + i0 = i + templateY[k]; + if (i0 >= 0) { + bit = bitmap[i0][j0]; + if (bit) { + contextLabel |= bit << shift; + } + } + } + } + } + var pixel = decoder.readBit(contexts, contextLabel); + row[j] = pixel; + } + } + return bitmap; + } + + // 6.3.2 Generic Refinement Region Decoding Procedure + function decodeRefinement(width, height, templateIndex, referenceBitmap, + offsetX, offsetY, prediction, at, + decodingContext) { + var codingTemplate = RefinementTemplates[templateIndex].coding; + if (templateIndex === 0) { + codingTemplate = codingTemplate.concat([at[0]]); + } + var codingTemplateLength = codingTemplate.length; + var codingTemplateX = new Int32Array(codingTemplateLength); + var codingTemplateY = new Int32Array(codingTemplateLength); + var k; + for (k = 0; k < codingTemplateLength; k++) { + codingTemplateX[k] = codingTemplate[k].x; + codingTemplateY[k] = codingTemplate[k].y; + } + + var referenceTemplate = RefinementTemplates[templateIndex].reference; + if (templateIndex === 0) { + referenceTemplate = referenceTemplate.concat([at[1]]); + } + var referenceTemplateLength = referenceTemplate.length; + var referenceTemplateX = new Int32Array(referenceTemplateLength); + var referenceTemplateY = new Int32Array(referenceTemplateLength); + for (k = 0; k < referenceTemplateLength; k++) { + referenceTemplateX[k] = referenceTemplate[k].x; + referenceTemplateY[k] = referenceTemplate[k].y; + } + var referenceWidth = referenceBitmap[0].length; + var referenceHeight = referenceBitmap.length; + + var pseudoPixelContext = RefinementReusedContexts[templateIndex]; + var bitmap = []; + + var decoder = decodingContext.decoder; + var contexts = decodingContext.contextCache.getContexts('GR'); + + var ltp = 0; + for (var i = 0; i < height; i++) { + if (prediction) { + var sltp = decoder.readBit(contexts, pseudoPixelContext); + ltp ^= sltp; + if (ltp) { + error('JBIG2 error: prediction is not supported'); + } + } + var row = new Uint8Array(width); + bitmap.push(row); + for (var j = 0; j < width; j++) { + var i0, j0; + var contextLabel = 0; + for (k = 0; k < codingTemplateLength; k++) { + i0 = i + codingTemplateY[k]; + j0 = j + codingTemplateX[k]; + if (i0 < 0 || j0 < 0 || j0 >= width) { + contextLabel <<= 1; // out of bound pixel + } else { + contextLabel = (contextLabel << 1) | bitmap[i0][j0]; + } + } + for (k = 0; k < referenceTemplateLength; k++) { + i0 = i + referenceTemplateY[k] + offsetY; + j0 = j + referenceTemplateX[k] + offsetX; + if (i0 < 0 || i0 >= referenceHeight || j0 < 0 || + j0 >= referenceWidth) { + contextLabel <<= 1; // out of bound pixel + } else { + contextLabel = (contextLabel << 1) | referenceBitmap[i0][j0]; + } + } + var pixel = decoder.readBit(contexts, contextLabel); + row[j] = pixel; + } + } + + return bitmap; + } + + // 6.5.5 Decoding the symbol dictionary + function decodeSymbolDictionary(huffman, refinement, symbols, + numberOfNewSymbols, numberOfExportedSymbols, + huffmanTables, templateIndex, at, + refinementTemplateIndex, refinementAt, + decodingContext) { + if (huffman) { + error('JBIG2 error: huffman is not supported'); + } + + var newSymbols = []; + var currentHeight = 0; + var symbolCodeLength = log2(symbols.length + numberOfNewSymbols); + + var decoder = decodingContext.decoder; + var contextCache = decodingContext.contextCache; + + while (newSymbols.length < numberOfNewSymbols) { + var deltaHeight = decodeInteger(contextCache, 'IADH', decoder); // 6.5.6 + currentHeight += deltaHeight; + var currentWidth = 0; + var totalWidth = 0; + while (true) { + var deltaWidth = decodeInteger(contextCache, 'IADW', decoder); // 6.5.7 + if (deltaWidth === null) { + break; // OOB + } + currentWidth += deltaWidth; + totalWidth += currentWidth; + var bitmap; + if (refinement) { + // 6.5.8.2 Refinement/aggregate-coded symbol bitmap + var numberOfInstances = decodeInteger(contextCache, 'IAAI', decoder); + if (numberOfInstances > 1) { + bitmap = decodeTextRegion(huffman, refinement, + currentWidth, currentHeight, 0, + numberOfInstances, 1, //strip size + symbols.concat(newSymbols), + symbolCodeLength, + 0, //transposed + 0, //ds offset + 1, //top left 7.4.3.1.1 + 0, //OR operator + huffmanTables, + refinementTemplateIndex, refinementAt, + decodingContext); + } else { + var symbolId = decodeIAID(contextCache, decoder, symbolCodeLength); + var rdx = decodeInteger(contextCache, 'IARDX', decoder); // 6.4.11.3 + var rdy = decodeInteger(contextCache, 'IARDY', decoder); // 6.4.11.4 + var symbol = (symbolId < symbols.length ? symbols[symbolId] : + newSymbols[symbolId - symbols.length]); + bitmap = decodeRefinement(currentWidth, currentHeight, + refinementTemplateIndex, symbol, rdx, rdy, false, refinementAt, + decodingContext); + } + } else { + // 6.5.8.1 Direct-coded symbol bitmap + bitmap = decodeBitmap(false, currentWidth, currentHeight, + templateIndex, false, null, at, decodingContext); + } + newSymbols.push(bitmap); + } + } + // 6.5.10 Exported symbols + var exportedSymbols = []; + var flags = [], currentFlag = false; + var totalSymbolsLength = symbols.length + numberOfNewSymbols; + while (flags.length < totalSymbolsLength) { + var runLength = decodeInteger(contextCache, 'IAEX', decoder); + while (runLength--) { + flags.push(currentFlag); + } + currentFlag = !currentFlag; + } + for (var i = 0, ii = symbols.length; i < ii; i++) { + if (flags[i]) { + exportedSymbols.push(symbols[i]); + } + } + for (var j = 0; j < numberOfNewSymbols; i++, j++) { + if (flags[i]) { + exportedSymbols.push(newSymbols[j]); + } + } + return exportedSymbols; + } + + function decodeTextRegion(huffman, refinement, width, height, + defaultPixelValue, numberOfSymbolInstances, + stripSize, inputSymbols, symbolCodeLength, + transposed, dsOffset, referenceCorner, + combinationOperator, huffmanTables, + refinementTemplateIndex, refinementAt, + decodingContext) { + if (huffman) { + error('JBIG2 error: huffman is not supported'); + } + + // Prepare bitmap + var bitmap = []; + var i, row; + for (i = 0; i < height; i++) { + row = new Uint8Array(width); + if (defaultPixelValue) { + for (var j = 0; j < width; j++) { + row[j] = defaultPixelValue; + } + } + bitmap.push(row); + } + + var decoder = decodingContext.decoder; + var contextCache = decodingContext.contextCache; + var stripT = -decodeInteger(contextCache, 'IADT', decoder); // 6.4.6 + var firstS = 0; + i = 0; + while (i < numberOfSymbolInstances) { + var deltaT = decodeInteger(contextCache, 'IADT', decoder); // 6.4.6 + stripT += deltaT; + + var deltaFirstS = decodeInteger(contextCache, 'IAFS', decoder); // 6.4.7 + firstS += deltaFirstS; + var currentS = firstS; + do { + var currentT = (stripSize === 1 ? 0 : + decodeInteger(contextCache, 'IAIT', decoder)); // 6.4.9 + var t = stripSize * stripT + currentT; + var symbolId = decodeIAID(contextCache, decoder, symbolCodeLength); + var applyRefinement = (refinement && + decodeInteger(contextCache, 'IARI', decoder)); + var symbolBitmap = inputSymbols[symbolId]; + var symbolWidth = symbolBitmap[0].length; + var symbolHeight = symbolBitmap.length; + if (applyRefinement) { + var rdw = decodeInteger(contextCache, 'IARDW', decoder); // 6.4.11.1 + var rdh = decodeInteger(contextCache, 'IARDH', decoder); // 6.4.11.2 + var rdx = decodeInteger(contextCache, 'IARDX', decoder); // 6.4.11.3 + var rdy = decodeInteger(contextCache, 'IARDY', decoder); // 6.4.11.4 + symbolWidth += rdw; + symbolHeight += rdh; + symbolBitmap = decodeRefinement(symbolWidth, symbolHeight, + refinementTemplateIndex, symbolBitmap, (rdw >> 1) + rdx, + (rdh >> 1) + rdy, false, refinementAt, + decodingContext); + } + var offsetT = t - ((referenceCorner & 1) ? 0 : symbolHeight); + var offsetS = currentS - ((referenceCorner & 2) ? symbolWidth : 0); + var s2, t2, symbolRow; + if (transposed) { + // Place Symbol Bitmap from T1,S1 + for (s2 = 0; s2 < symbolHeight; s2++) { + row = bitmap[offsetS + s2]; + if (!row) { + continue; + } + symbolRow = symbolBitmap[s2]; + // To ignore Parts of Symbol bitmap which goes + // outside bitmap region + var maxWidth = Math.min(width - offsetT, symbolWidth); + switch (combinationOperator) { + case 0: // OR + for (t2 = 0; t2 < maxWidth; t2++) { + row[offsetT + t2] |= symbolRow[t2]; + } + break; + case 2: // XOR + for (t2 = 0; t2 < maxWidth; t2++) { + row[offsetT + t2] ^= symbolRow[t2]; + } + break; + default: + error('JBIG2 error: operator ' + combinationOperator + + ' is not supported'); + } + } + currentS += symbolHeight - 1; + } else { + for (t2 = 0; t2 < symbolHeight; t2++) { + row = bitmap[offsetT + t2]; + if (!row) { + continue; + } + symbolRow = symbolBitmap[t2]; + switch (combinationOperator) { + case 0: // OR + for (s2 = 0; s2 < symbolWidth; s2++) { + row[offsetS + s2] |= symbolRow[s2]; + } + break; + case 2: // XOR + for (s2 = 0; s2 < symbolWidth; s2++) { + row[offsetS + s2] ^= symbolRow[s2]; + } + break; + default: + error('JBIG2 error: operator ' + combinationOperator + + ' is not supported'); + } + } + currentS += symbolWidth - 1; + } + i++; + var deltaS = decodeInteger(contextCache, 'IADS', decoder); // 6.4.8 + if (deltaS === null) { + break; // OOB + } + currentS += deltaS + dsOffset; + } while (true); + } + return bitmap; + } + + function readSegmentHeader(data, start) { + var segmentHeader = {}; + segmentHeader.number = readUint32(data, start); + var flags = data[start + 4]; + var segmentType = flags & 0x3F; + if (!SegmentTypes[segmentType]) { + error('JBIG2 error: invalid segment type: ' + segmentType); + } + segmentHeader.type = segmentType; + segmentHeader.typeName = SegmentTypes[segmentType]; + segmentHeader.deferredNonRetain = !!(flags & 0x80); + + var pageAssociationFieldSize = !!(flags & 0x40); + var referredFlags = data[start + 5]; + var referredToCount = (referredFlags >> 5) & 7; + var retainBits = [referredFlags & 31]; + var position = start + 6; + if (referredFlags === 7) { + referredToCount = readUint32(data, position - 1) & 0x1FFFFFFF; + position += 3; + var bytes = (referredToCount + 7) >> 3; + retainBits[0] = data[position++]; + while (--bytes > 0) { + retainBits.push(data[position++]); + } + } else if (referredFlags === 5 || referredFlags === 6) { + error('JBIG2 error: invalid referred-to flags'); + } + + segmentHeader.retainBits = retainBits; + var referredToSegmentNumberSize = (segmentHeader.number <= 256 ? 1 : + (segmentHeader.number <= 65536 ? 2 : 4)); + var referredTo = []; + var i, ii; + for (i = 0; i < referredToCount; i++) { + var number = (referredToSegmentNumberSize === 1 ? data[position] : + (referredToSegmentNumberSize === 2 ? readUint16(data, position) : + readUint32(data, position))); + referredTo.push(number); + position += referredToSegmentNumberSize; + } + segmentHeader.referredTo = referredTo; + if (!pageAssociationFieldSize) { + segmentHeader.pageAssociation = data[position++]; + } else { + segmentHeader.pageAssociation = readUint32(data, position); + position += 4; + } + segmentHeader.length = readUint32(data, position); + position += 4; + + if (segmentHeader.length === 0xFFFFFFFF) { + // 7.2.7 Segment data length, unknown segment length + if (segmentType === 38) { // ImmediateGenericRegion + var genericRegionInfo = readRegionSegmentInformation(data, position); + var genericRegionSegmentFlags = data[position + + RegionSegmentInformationFieldLength]; + var genericRegionMmr = !!(genericRegionSegmentFlags & 1); + // searching for the segment end + var searchPatternLength = 6; + var searchPattern = new Uint8Array(searchPatternLength); + if (!genericRegionMmr) { + searchPattern[0] = 0xFF; + searchPattern[1] = 0xAC; + } + searchPattern[2] = (genericRegionInfo.height >>> 24) & 0xFF; + searchPattern[3] = (genericRegionInfo.height >> 16) & 0xFF; + searchPattern[4] = (genericRegionInfo.height >> 8) & 0xFF; + searchPattern[5] = genericRegionInfo.height & 0xFF; + for (i = position, ii = data.length; i < ii; i++) { + var j = 0; + while (j < searchPatternLength && searchPattern[j] === data[i + j]) { + j++; + } + if (j === searchPatternLength) { + segmentHeader.length = i + searchPatternLength; + break; + } + } + if (segmentHeader.length === 0xFFFFFFFF) { + error('JBIG2 error: segment end was not found'); + } + } else { + error('JBIG2 error: invalid unknown segment length'); + } + } + segmentHeader.headerEnd = position; + return segmentHeader; + } + + function readSegments(header, data, start, end) { + var segments = []; + var position = start; + while (position < end) { + var segmentHeader = readSegmentHeader(data, position); + position = segmentHeader.headerEnd; + var segment = { + header: segmentHeader, + data: data + }; + if (!header.randomAccess) { + segment.start = position; + position += segmentHeader.length; + segment.end = position; + } + segments.push(segment); + if (segmentHeader.type === 51) { + break; // end of file is found + } + } + if (header.randomAccess) { + for (var i = 0, ii = segments.length; i < ii; i++) { + segments[i].start = position; + position += segments[i].header.length; + segments[i].end = position; + } + } + return segments; + } + + // 7.4.1 Region segment information field + function readRegionSegmentInformation(data, start) { + return { + width: readUint32(data, start), + height: readUint32(data, start + 4), + x: readUint32(data, start + 8), + y: readUint32(data, start + 12), + combinationOperator: data[start + 16] & 7 + }; + } + var RegionSegmentInformationFieldLength = 17; + + function processSegment(segment, visitor) { + var header = segment.header; + + var data = segment.data, position = segment.start, end = segment.end; + var args, at, i, atLength; + switch (header.type) { + case 0: // SymbolDictionary + // 7.4.2 Symbol dictionary segment syntax + var dictionary = {}; + var dictionaryFlags = readUint16(data, position); // 7.4.2.1.1 + dictionary.huffman = !!(dictionaryFlags & 1); + dictionary.refinement = !!(dictionaryFlags & 2); + dictionary.huffmanDHSelector = (dictionaryFlags >> 2) & 3; + dictionary.huffmanDWSelector = (dictionaryFlags >> 4) & 3; + dictionary.bitmapSizeSelector = (dictionaryFlags >> 6) & 1; + dictionary.aggregationInstancesSelector = (dictionaryFlags >> 7) & 1; + dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256); + dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512); + dictionary.template = (dictionaryFlags >> 10) & 3; + dictionary.refinementTemplate = (dictionaryFlags >> 12) & 1; + position += 2; + if (!dictionary.huffman) { + atLength = dictionary.template === 0 ? 4 : 1; + at = []; + for (i = 0; i < atLength; i++) { + at.push({ + x: readInt8(data, position), + y: readInt8(data, position + 1) + }); + position += 2; + } + dictionary.at = at; + } + if (dictionary.refinement && !dictionary.refinementTemplate) { + at = []; + for (i = 0; i < 2; i++) { + at.push({ + x: readInt8(data, position), + y: readInt8(data, position + 1) + }); + position += 2; + } + dictionary.refinementAt = at; + } + dictionary.numberOfExportedSymbols = readUint32(data, position); + position += 4; + dictionary.numberOfNewSymbols = readUint32(data, position); + position += 4; + args = [dictionary, header.number, header.referredTo, + data, position, end]; + break; + case 6: // ImmediateTextRegion + case 7: // ImmediateLosslessTextRegion + var textRegion = {}; + textRegion.info = readRegionSegmentInformation(data, position); + position += RegionSegmentInformationFieldLength; + var textRegionSegmentFlags = readUint16(data, position); + position += 2; + textRegion.huffman = !!(textRegionSegmentFlags & 1); + textRegion.refinement = !!(textRegionSegmentFlags & 2); + textRegion.stripSize = 1 << ((textRegionSegmentFlags >> 2) & 3); + textRegion.referenceCorner = (textRegionSegmentFlags >> 4) & 3; + textRegion.transposed = !!(textRegionSegmentFlags & 64); + textRegion.combinationOperator = (textRegionSegmentFlags >> 7) & 3; + textRegion.defaultPixelValue = (textRegionSegmentFlags >> 9) & 1; + textRegion.dsOffset = (textRegionSegmentFlags << 17) >> 27; + textRegion.refinementTemplate = (textRegionSegmentFlags >> 15) & 1; + if (textRegion.huffman) { + var textRegionHuffmanFlags = readUint16(data, position); + position += 2; + textRegion.huffmanFS = (textRegionHuffmanFlags) & 3; + textRegion.huffmanDS = (textRegionHuffmanFlags >> 2) & 3; + textRegion.huffmanDT = (textRegionHuffmanFlags >> 4) & 3; + textRegion.huffmanRefinementDW = (textRegionHuffmanFlags >> 6) & 3; + textRegion.huffmanRefinementDH = (textRegionHuffmanFlags >> 8) & 3; + textRegion.huffmanRefinementDX = (textRegionHuffmanFlags >> 10) & 3; + textRegion.huffmanRefinementDY = (textRegionHuffmanFlags >> 12) & 3; + textRegion.huffmanRefinementSizeSelector = + !!(textRegionHuffmanFlags & 14); + } + if (textRegion.refinement && !textRegion.refinementTemplate) { + at = []; + for (i = 0; i < 2; i++) { + at.push({ + x: readInt8(data, position), + y: readInt8(data, position + 1) + }); + position += 2; + } + textRegion.refinementAt = at; + } + textRegion.numberOfSymbolInstances = readUint32(data, position); + position += 4; + // TODO 7.4.3.1.7 Symbol ID Huffman table decoding + if (textRegion.huffman) { + error('JBIG2 error: huffman is not supported'); + } + args = [textRegion, header.referredTo, data, position, end]; + break; + case 38: // ImmediateGenericRegion + case 39: // ImmediateLosslessGenericRegion + var genericRegion = {}; + genericRegion.info = readRegionSegmentInformation(data, position); + position += RegionSegmentInformationFieldLength; + var genericRegionSegmentFlags = data[position++]; + genericRegion.mmr = !!(genericRegionSegmentFlags & 1); + genericRegion.template = (genericRegionSegmentFlags >> 1) & 3; + genericRegion.prediction = !!(genericRegionSegmentFlags & 8); + if (!genericRegion.mmr) { + atLength = genericRegion.template === 0 ? 4 : 1; + at = []; + for (i = 0; i < atLength; i++) { + at.push({ + x: readInt8(data, position), + y: readInt8(data, position + 1) + }); + position += 2; + } + genericRegion.at = at; + } + args = [genericRegion, data, position, end]; + break; + case 48: // PageInformation + var pageInfo = { + width: readUint32(data, position), + height: readUint32(data, position + 4), + resolutionX: readUint32(data, position + 8), + resolutionY: readUint32(data, position + 12) + }; + if (pageInfo.height === 0xFFFFFFFF) { + delete pageInfo.height; + } + var pageSegmentFlags = data[position + 16]; + var pageStripingInformation = readUint16(data, position + 17); + pageInfo.lossless = !!(pageSegmentFlags & 1); + pageInfo.refinement = !!(pageSegmentFlags & 2); + pageInfo.defaultPixelValue = (pageSegmentFlags >> 2) & 1; + pageInfo.combinationOperator = (pageSegmentFlags >> 3) & 3; + pageInfo.requiresBuffer = !!(pageSegmentFlags & 32); + pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64); + args = [pageInfo]; + break; + case 49: // EndOfPage + break; + case 50: // EndOfStripe + break; + case 51: // EndOfFile + break; + case 62: // 7.4.15 defines 2 extension types which + // are comments and can be ignored. + break; + default: + error('JBIG2 error: segment type ' + header.typeName + '(' + + header.type + ') is not implemented'); + } + var callbackName = 'on' + header.typeName; + if (callbackName in visitor) { + visitor[callbackName].apply(visitor, args); + } + } + + function processSegments(segments, visitor) { + for (var i = 0, ii = segments.length; i < ii; i++) { + processSegment(segments[i], visitor); + } + } + + function parseJbig2(data, start, end) { + var position = start; + if (data[position] !== 0x97 || data[position + 1] !== 0x4A || + data[position + 2] !== 0x42 || data[position + 3] !== 0x32 || + data[position + 4] !== 0x0D || data[position + 5] !== 0x0A || + data[position + 6] !== 0x1A || data[position + 7] !== 0x0A) { + error('JBIG2 error: invalid header'); + } + var header = {}; + position += 8; + var flags = data[position++]; + header.randomAccess = !(flags & 1); + if (!(flags & 2)) { + header.numberOfPages = readUint32(data, position); + position += 4; + } + var segments = readSegments(header, data, position, end); + error('Not implemented'); + // processSegments(segments, new SimpleSegmentVisitor()); + } + + function parseJbig2Chunks(chunks) { + var visitor = new SimpleSegmentVisitor(); + for (var i = 0, ii = chunks.length; i < ii; i++) { + var chunk = chunks[i]; + var segments = readSegments({}, chunk.data, chunk.start, chunk.end); + processSegments(segments, visitor); + } + return visitor.buffer; + } + + function SimpleSegmentVisitor() {} + + SimpleSegmentVisitor.prototype = { + onPageInformation: function SimpleSegmentVisitor_onPageInformation(info) { + this.currentPageInfo = info; + var rowSize = (info.width + 7) >> 3; + var buffer = new Uint8Array(rowSize * info.height); + // The contents of ArrayBuffers are initialized to 0. + // Fill the buffer with 0xFF only if info.defaultPixelValue is set + if (info.defaultPixelValue) { + for (var i = 0, ii = buffer.length; i < ii; i++) { + buffer[i] = 0xFF; + } + } + this.buffer = buffer; + }, + drawBitmap: function SimpleSegmentVisitor_drawBitmap(regionInfo, bitmap) { + var pageInfo = this.currentPageInfo; + var width = regionInfo.width, height = regionInfo.height; + var rowSize = (pageInfo.width + 7) >> 3; + var combinationOperator = pageInfo.combinationOperatorOverride ? + regionInfo.combinationOperator : pageInfo.combinationOperator; + var buffer = this.buffer; + var mask0 = 128 >> (regionInfo.x & 7); + var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3); + var i, j, mask, offset; + switch (combinationOperator) { + case 0: // OR + for (i = 0; i < height; i++) { + mask = mask0; + offset = offset0; + for (j = 0; j < width; j++) { + if (bitmap[i][j]) { + buffer[offset] |= mask; + } + mask >>= 1; + if (!mask) { + mask = 128; + offset++; + } + } + offset0 += rowSize; + } + break; + case 2: // XOR + for (i = 0; i < height; i++) { + mask = mask0; + offset = offset0; + for (j = 0; j < width; j++) { + if (bitmap[i][j]) { + buffer[offset] ^= mask; + } + mask >>= 1; + if (!mask) { + mask = 128; + offset++; + } + } + offset0 += rowSize; + } + break; + default: + error('JBIG2 error: operator ' + combinationOperator + + ' is not supported'); + } + }, + onImmediateGenericRegion: + function SimpleSegmentVisitor_onImmediateGenericRegion(region, data, + start, end) { + var regionInfo = region.info; + var decodingContext = new DecodingContext(data, start, end); + var bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, + region.template, region.prediction, null, + region.at, decodingContext); + this.drawBitmap(regionInfo, bitmap); + }, + onImmediateLosslessGenericRegion: + function SimpleSegmentVisitor_onImmediateLosslessGenericRegion() { + this.onImmediateGenericRegion.apply(this, arguments); + }, + onSymbolDictionary: + function SimpleSegmentVisitor_onSymbolDictionary(dictionary, + currentSegment, + referredSegments, + data, start, end) { + var huffmanTables; + if (dictionary.huffman) { + error('JBIG2 error: huffman is not supported'); + } + + // Combines exported symbols from all referred segments + var symbols = this.symbols; + if (!symbols) { + this.symbols = symbols = {}; + } + + var inputSymbols = []; + for (var i = 0, ii = referredSegments.length; i < ii; i++) { + inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]); + } + + var decodingContext = new DecodingContext(data, start, end); + symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, + dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, + dictionary.numberOfExportedSymbols, huffmanTables, + dictionary.template, dictionary.at, + dictionary.refinementTemplate, dictionary.refinementAt, + decodingContext); + }, + onImmediateTextRegion: + function SimpleSegmentVisitor_onImmediateTextRegion(region, + referredSegments, + data, start, end) { + var regionInfo = region.info; + var huffmanTables; + + // Combines exported symbols from all referred segments + var symbols = this.symbols; + var inputSymbols = []; + for (var i = 0, ii = referredSegments.length; i < ii; i++) { + inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]); + } + var symbolCodeLength = log2(inputSymbols.length); + + var decodingContext = new DecodingContext(data, start, end); + var bitmap = decodeTextRegion(region.huffman, region.refinement, + regionInfo.width, regionInfo.height, region.defaultPixelValue, + region.numberOfSymbolInstances, region.stripSize, inputSymbols, + symbolCodeLength, region.transposed, region.dsOffset, + region.referenceCorner, region.combinationOperator, huffmanTables, + region.refinementTemplate, region.refinementAt, decodingContext); + this.drawBitmap(regionInfo, bitmap); + }, + onImmediateLosslessTextRegion: + function SimpleSegmentVisitor_onImmediateLosslessTextRegion() { + this.onImmediateTextRegion.apply(this, arguments); + } + }; + + function Jbig2Image() {} + + Jbig2Image.prototype = { + parseChunks: function Jbig2Image_parseChunks(chunks) { + return parseJbig2Chunks(chunks); + } + }; + + return Jbig2Image; +})(); + +exports.Jbig2Image = Jbig2Image; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreJpx = {}), root.pdfjsSharedUtil, + root.pdfjsCoreArithmeticDecoder); + } +}(this, function (exports, sharedUtil, coreArithmeticDecoder) { + +var info = sharedUtil.info; +var log2 = sharedUtil.log2; +var readUint16 = sharedUtil.readUint16; +var readUint32 = sharedUtil.readUint32; +var warn = sharedUtil.warn; +var ArithmeticDecoder = coreArithmeticDecoder.ArithmeticDecoder; + +var JpxImage = (function JpxImageClosure() { + // Table E.1 + var SubbandsGainLog2 = { + 'LL': 0, + 'LH': 1, + 'HL': 1, + 'HH': 2 + }; + function JpxImage() { + this.failOnCorruptedImage = false; + } + JpxImage.prototype = { + parse: function JpxImage_parse(data) { + + var head = readUint16(data, 0); + // No box header, immediate start of codestream (SOC) + if (head === 0xFF4F) { + this.parseCodestream(data, 0, data.length); + return; + } + + var position = 0, length = data.length; + while (position < length) { + var headerSize = 8; + var lbox = readUint32(data, position); + var tbox = readUint32(data, position + 4); + position += headerSize; + if (lbox === 1) { + // XLBox: read UInt64 according to spec. + // JavaScript's int precision of 53 bit should be sufficient here. + lbox = readUint32(data, position) * 4294967296 + + readUint32(data, position + 4); + position += 8; + headerSize += 8; + } + if (lbox === 0) { + lbox = length - position + headerSize; + } + if (lbox < headerSize) { + throw new Error('JPX Error: Invalid box field size'); + } + var dataLength = lbox - headerSize; + var jumpDataLength = true; + switch (tbox) { + case 0x6A703268: // 'jp2h' + jumpDataLength = false; // parsing child boxes + break; + case 0x636F6C72: // 'colr' + // Colorspaces are not used, the CS from the PDF is used. + var method = data[position]; + if (method === 1) { + // enumerated colorspace + var colorspace = readUint32(data, position + 3); + switch (colorspace) { + case 16: // this indicates a sRGB colorspace + case 17: // this indicates a grayscale colorspace + case 18: // this indicates a YUV colorspace + break; + default: + warn('Unknown colorspace ' + colorspace); + break; + } + } else if (method === 2) { + info('ICC profile not supported'); + } + break; + case 0x6A703263: // 'jp2c' + this.parseCodestream(data, position, position + dataLength); + break; + case 0x6A502020: // 'jP\024\024' + if (0x0d0a870a !== readUint32(data, position)) { + warn('Invalid JP2 signature'); + } + break; + // The following header types are valid but currently not used: + case 0x6A501A1A: // 'jP\032\032' + case 0x66747970: // 'ftyp' + case 0x72726571: // 'rreq' + case 0x72657320: // 'res ' + case 0x69686472: // 'ihdr' + break; + default: + var headerType = String.fromCharCode((tbox >> 24) & 0xFF, + (tbox >> 16) & 0xFF, + (tbox >> 8) & 0xFF, + tbox & 0xFF); + warn('Unsupported header type ' + tbox + ' (' + headerType + ')'); + break; + } + if (jumpDataLength) { + position += dataLength; + } + } + }, + parseImageProperties: function JpxImage_parseImageProperties(stream) { + var newByte = stream.getByte(); + while (newByte >= 0) { + var oldByte = newByte; + newByte = stream.getByte(); + var code = (oldByte << 8) | newByte; + // Image and tile size (SIZ) + if (code === 0xFF51) { + stream.skip(4); + var Xsiz = stream.getInt32() >>> 0; // Byte 4 + var Ysiz = stream.getInt32() >>> 0; // Byte 8 + var XOsiz = stream.getInt32() >>> 0; // Byte 12 + var YOsiz = stream.getInt32() >>> 0; // Byte 16 + stream.skip(16); + var Csiz = stream.getUint16(); // Byte 36 + this.width = Xsiz - XOsiz; + this.height = Ysiz - YOsiz; + this.componentsCount = Csiz; + // Results are always returned as Uint8Arrays + this.bitsPerComponent = 8; + return; + } + } + throw new Error('JPX Error: No size marker found in JPX stream'); + }, + parseCodestream: function JpxImage_parseCodestream(data, start, end) { + var context = {}; + try { + var doNotRecover = false; + var position = start; + while (position + 1 < end) { + var code = readUint16(data, position); + position += 2; + + var length = 0, j, sqcd, spqcds, spqcdSize, scalarExpounded, tile; + switch (code) { + case 0xFF4F: // Start of codestream (SOC) + context.mainHeader = true; + break; + case 0xFFD9: // End of codestream (EOC) + break; + case 0xFF51: // Image and tile size (SIZ) + length = readUint16(data, position); + var siz = {}; + siz.Xsiz = readUint32(data, position + 4); + siz.Ysiz = readUint32(data, position + 8); + siz.XOsiz = readUint32(data, position + 12); + siz.YOsiz = readUint32(data, position + 16); + siz.XTsiz = readUint32(data, position + 20); + siz.YTsiz = readUint32(data, position + 24); + siz.XTOsiz = readUint32(data, position + 28); + siz.YTOsiz = readUint32(data, position + 32); + var componentsCount = readUint16(data, position + 36); + siz.Csiz = componentsCount; + var components = []; + j = position + 38; + for (var i = 0; i < componentsCount; i++) { + var component = { + precision: (data[j] & 0x7F) + 1, + isSigned: !!(data[j] & 0x80), + XRsiz: data[j + 1], + YRsiz: data[j + 1] + }; + calculateComponentDimensions(component, siz); + components.push(component); + } + context.SIZ = siz; + context.components = components; + calculateTileGrids(context, components); + context.QCC = []; + context.COC = []; + break; + case 0xFF5C: // Quantization default (QCD) + length = readUint16(data, position); + var qcd = {}; + j = position + 2; + sqcd = data[j++]; + switch (sqcd & 0x1F) { + case 0: + spqcdSize = 8; + scalarExpounded = true; + break; + case 1: + spqcdSize = 16; + scalarExpounded = false; + break; + case 2: + spqcdSize = 16; + scalarExpounded = true; + break; + default: + throw new Error('JPX Error: Invalid SQcd value ' + sqcd); + } + qcd.noQuantization = (spqcdSize === 8); + qcd.scalarExpounded = scalarExpounded; + qcd.guardBits = sqcd >> 5; + spqcds = []; + while (j < length + position) { + var spqcd = {}; + if (spqcdSize === 8) { + spqcd.epsilon = data[j++] >> 3; + spqcd.mu = 0; + } else { + spqcd.epsilon = data[j] >> 3; + spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1]; + j += 2; + } + spqcds.push(spqcd); + } + qcd.SPqcds = spqcds; + if (context.mainHeader) { + context.QCD = qcd; + } else { + context.currentTile.QCD = qcd; + context.currentTile.QCC = []; + } + break; + case 0xFF5D: // Quantization component (QCC) + length = readUint16(data, position); + var qcc = {}; + j = position + 2; + var cqcc; + if (context.SIZ.Csiz < 257) { + cqcc = data[j++]; + } else { + cqcc = readUint16(data, j); + j += 2; + } + sqcd = data[j++]; + switch (sqcd & 0x1F) { + case 0: + spqcdSize = 8; + scalarExpounded = true; + break; + case 1: + spqcdSize = 16; + scalarExpounded = false; + break; + case 2: + spqcdSize = 16; + scalarExpounded = true; + break; + default: + throw new Error('JPX Error: Invalid SQcd value ' + sqcd); + } + qcc.noQuantization = (spqcdSize === 8); + qcc.scalarExpounded = scalarExpounded; + qcc.guardBits = sqcd >> 5; + spqcds = []; + while (j < (length + position)) { + spqcd = {}; + if (spqcdSize === 8) { + spqcd.epsilon = data[j++] >> 3; + spqcd.mu = 0; + } else { + spqcd.epsilon = data[j] >> 3; + spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1]; + j += 2; + } + spqcds.push(spqcd); + } + qcc.SPqcds = spqcds; + if (context.mainHeader) { + context.QCC[cqcc] = qcc; + } else { + context.currentTile.QCC[cqcc] = qcc; + } + break; + case 0xFF52: // Coding style default (COD) + length = readUint16(data, position); + var cod = {}; + j = position + 2; + var scod = data[j++]; + cod.entropyCoderWithCustomPrecincts = !!(scod & 1); + cod.sopMarkerUsed = !!(scod & 2); + cod.ephMarkerUsed = !!(scod & 4); + cod.progressionOrder = data[j++]; + cod.layersCount = readUint16(data, j); + j += 2; + cod.multipleComponentTransform = data[j++]; + + cod.decompositionLevelsCount = data[j++]; + cod.xcb = (data[j++] & 0xF) + 2; + cod.ycb = (data[j++] & 0xF) + 2; + var blockStyle = data[j++]; + cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1); + cod.resetContextProbabilities = !!(blockStyle & 2); + cod.terminationOnEachCodingPass = !!(blockStyle & 4); + cod.verticalyStripe = !!(blockStyle & 8); + cod.predictableTermination = !!(blockStyle & 16); + cod.segmentationSymbolUsed = !!(blockStyle & 32); + cod.reversibleTransformation = data[j++]; + if (cod.entropyCoderWithCustomPrecincts) { + var precinctsSizes = []; + while (j < length + position) { + var precinctsSize = data[j++]; + precinctsSizes.push({ + PPx: precinctsSize & 0xF, + PPy: precinctsSize >> 4 + }); + } + cod.precinctsSizes = precinctsSizes; + } + var unsupported = []; + if (cod.selectiveArithmeticCodingBypass) { + unsupported.push('selectiveArithmeticCodingBypass'); + } + if (cod.resetContextProbabilities) { + unsupported.push('resetContextProbabilities'); + } + if (cod.terminationOnEachCodingPass) { + unsupported.push('terminationOnEachCodingPass'); + } + if (cod.verticalyStripe) { + unsupported.push('verticalyStripe'); + } + if (cod.predictableTermination) { + unsupported.push('predictableTermination'); + } + if (unsupported.length > 0) { + doNotRecover = true; + throw new Error('JPX Error: Unsupported COD options (' + + unsupported.join(', ') + ')'); + } + if (context.mainHeader) { + context.COD = cod; + } else { + context.currentTile.COD = cod; + context.currentTile.COC = []; + } + break; + case 0xFF90: // Start of tile-part (SOT) + length = readUint16(data, position); + tile = {}; + tile.index = readUint16(data, position + 2); + tile.length = readUint32(data, position + 4); + tile.dataEnd = tile.length + position - 2; + tile.partIndex = data[position + 8]; + tile.partsCount = data[position + 9]; + + context.mainHeader = false; + if (tile.partIndex === 0) { + // reset component specific settings + tile.COD = context.COD; + tile.COC = context.COC.slice(0); // clone of the global COC + tile.QCD = context.QCD; + tile.QCC = context.QCC.slice(0); // clone of the global COC + } + context.currentTile = tile; + break; + case 0xFF93: // Start of data (SOD) + tile = context.currentTile; + if (tile.partIndex === 0) { + initializeTile(context, tile.index); + buildPackets(context); + } + + // moving to the end of the data + length = tile.dataEnd - position; + parseTilePackets(context, data, position, length); + break; + case 0xFF55: // Tile-part lengths, main header (TLM) + case 0xFF57: // Packet length, main header (PLM) + case 0xFF58: // Packet length, tile-part header (PLT) + case 0xFF64: // Comment (COM) + length = readUint16(data, position); + // skipping content + break; + case 0xFF53: // Coding style component (COC) + throw new Error('JPX Error: Codestream code 0xFF53 (COC) is ' + + 'not implemented'); + default: + throw new Error('JPX Error: Unknown codestream code: ' + + code.toString(16)); + } + position += length; + } + } catch (e) { + if (doNotRecover || this.failOnCorruptedImage) { + throw e; + } else { + warn('Trying to recover from ' + e.message); + } + } + this.tiles = transformComponents(context); + this.width = context.SIZ.Xsiz - context.SIZ.XOsiz; + this.height = context.SIZ.Ysiz - context.SIZ.YOsiz; + this.componentsCount = context.SIZ.Csiz; + } + }; + function calculateComponentDimensions(component, siz) { + // Section B.2 Component mapping + component.x0 = Math.ceil(siz.XOsiz / component.XRsiz); + component.x1 = Math.ceil(siz.Xsiz / component.XRsiz); + component.y0 = Math.ceil(siz.YOsiz / component.YRsiz); + component.y1 = Math.ceil(siz.Ysiz / component.YRsiz); + component.width = component.x1 - component.x0; + component.height = component.y1 - component.y0; + } + function calculateTileGrids(context, components) { + var siz = context.SIZ; + // Section B.3 Division into tile and tile-components + var tile, tiles = []; + var numXtiles = Math.ceil((siz.Xsiz - siz.XTOsiz) / siz.XTsiz); + var numYtiles = Math.ceil((siz.Ysiz - siz.YTOsiz) / siz.YTsiz); + for (var q = 0; q < numYtiles; q++) { + for (var p = 0; p < numXtiles; p++) { + tile = {}; + tile.tx0 = Math.max(siz.XTOsiz + p * siz.XTsiz, siz.XOsiz); + tile.ty0 = Math.max(siz.YTOsiz + q * siz.YTsiz, siz.YOsiz); + tile.tx1 = Math.min(siz.XTOsiz + (p + 1) * siz.XTsiz, siz.Xsiz); + tile.ty1 = Math.min(siz.YTOsiz + (q + 1) * siz.YTsiz, siz.Ysiz); + tile.width = tile.tx1 - tile.tx0; + tile.height = tile.ty1 - tile.ty0; + tile.components = []; + tiles.push(tile); + } + } + context.tiles = tiles; + + var componentsCount = siz.Csiz; + for (var i = 0, ii = componentsCount; i < ii; i++) { + var component = components[i]; + for (var j = 0, jj = tiles.length; j < jj; j++) { + var tileComponent = {}; + tile = tiles[j]; + tileComponent.tcx0 = Math.ceil(tile.tx0 / component.XRsiz); + tileComponent.tcy0 = Math.ceil(tile.ty0 / component.YRsiz); + tileComponent.tcx1 = Math.ceil(tile.tx1 / component.XRsiz); + tileComponent.tcy1 = Math.ceil(tile.ty1 / component.YRsiz); + tileComponent.width = tileComponent.tcx1 - tileComponent.tcx0; + tileComponent.height = tileComponent.tcy1 - tileComponent.tcy0; + tile.components[i] = tileComponent; + } + } + } + function getBlocksDimensions(context, component, r) { + var codOrCoc = component.codingStyleParameters; + var result = {}; + if (!codOrCoc.entropyCoderWithCustomPrecincts) { + result.PPx = 15; + result.PPy = 15; + } else { + result.PPx = codOrCoc.precinctsSizes[r].PPx; + result.PPy = codOrCoc.precinctsSizes[r].PPy; + } + // calculate codeblock size as described in section B.7 + result.xcb_ = (r > 0 ? Math.min(codOrCoc.xcb, result.PPx - 1) : + Math.min(codOrCoc.xcb, result.PPx)); + result.ycb_ = (r > 0 ? Math.min(codOrCoc.ycb, result.PPy - 1) : + Math.min(codOrCoc.ycb, result.PPy)); + return result; + } + function buildPrecincts(context, resolution, dimensions) { + // Section B.6 Division resolution to precincts + var precinctWidth = 1 << dimensions.PPx; + var precinctHeight = 1 << dimensions.PPy; + // Jasper introduces codeblock groups for mapping each subband codeblocks + // to precincts. Precinct partition divides a resolution according to width + // and height parameters. The subband that belongs to the resolution level + // has a different size than the level, unless it is the zero resolution. + + // From Jasper documentation: jpeg2000.pdf, section K: Tier-2 coding: + // The precinct partitioning for a particular subband is derived from a + // partitioning of its parent LL band (i.e., the LL band at the next higher + // resolution level)... The LL band associated with each resolution level is + // divided into precincts... Each of the resulting precinct regions is then + // mapped into its child subbands (if any) at the next lower resolution + // level. This is accomplished by using the coordinate transformation + // (u, v) = (ceil(x/2), ceil(y/2)) where (x, y) and (u, v) are the + // coordinates of a point in the LL band and child subband, respectively. + var isZeroRes = resolution.resLevel === 0; + var precinctWidthInSubband = 1 << (dimensions.PPx + (isZeroRes ? 0 : -1)); + var precinctHeightInSubband = 1 << (dimensions.PPy + (isZeroRes ? 0 : -1)); + var numprecinctswide = (resolution.trx1 > resolution.trx0 ? + Math.ceil(resolution.trx1 / precinctWidth) - + Math.floor(resolution.trx0 / precinctWidth) : 0); + var numprecinctshigh = (resolution.try1 > resolution.try0 ? + Math.ceil(resolution.try1 / precinctHeight) - + Math.floor(resolution.try0 / precinctHeight) : 0); + var numprecincts = numprecinctswide * numprecinctshigh; + + resolution.precinctParameters = { + precinctWidth: precinctWidth, + precinctHeight: precinctHeight, + numprecinctswide: numprecinctswide, + numprecinctshigh: numprecinctshigh, + numprecincts: numprecincts, + precinctWidthInSubband: precinctWidthInSubband, + precinctHeightInSubband: precinctHeightInSubband + }; + } + function buildCodeblocks(context, subband, dimensions) { + // Section B.7 Division sub-band into code-blocks + var xcb_ = dimensions.xcb_; + var ycb_ = dimensions.ycb_; + var codeblockWidth = 1 << xcb_; + var codeblockHeight = 1 << ycb_; + var cbx0 = subband.tbx0 >> xcb_; + var cby0 = subband.tby0 >> ycb_; + var cbx1 = (subband.tbx1 + codeblockWidth - 1) >> xcb_; + var cby1 = (subband.tby1 + codeblockHeight - 1) >> ycb_; + var precinctParameters = subband.resolution.precinctParameters; + var codeblocks = []; + var precincts = []; + var i, j, codeblock, precinctNumber; + for (j = cby0; j < cby1; j++) { + for (i = cbx0; i < cbx1; i++) { + codeblock = { + cbx: i, + cby: j, + tbx0: codeblockWidth * i, + tby0: codeblockHeight * j, + tbx1: codeblockWidth * (i + 1), + tby1: codeblockHeight * (j + 1) + }; + + codeblock.tbx0_ = Math.max(subband.tbx0, codeblock.tbx0); + codeblock.tby0_ = Math.max(subband.tby0, codeblock.tby0); + codeblock.tbx1_ = Math.min(subband.tbx1, codeblock.tbx1); + codeblock.tby1_ = Math.min(subband.tby1, codeblock.tby1); + + // Calculate precinct number for this codeblock, codeblock position + // should be relative to its subband, use actual dimension and position + // See comment about codeblock group width and height + var pi = Math.floor((codeblock.tbx0_ - subband.tbx0) / + precinctParameters.precinctWidthInSubband); + var pj = Math.floor((codeblock.tby0_ - subband.tby0) / + precinctParameters.precinctHeightInSubband); + precinctNumber = pi + (pj * precinctParameters.numprecinctswide); + + codeblock.precinctNumber = precinctNumber; + codeblock.subbandType = subband.type; + codeblock.Lblock = 3; + + if (codeblock.tbx1_ <= codeblock.tbx0_ || + codeblock.tby1_ <= codeblock.tby0_) { + continue; + } + codeblocks.push(codeblock); + // building precinct for the sub-band + var precinct = precincts[precinctNumber]; + if (precinct !== undefined) { + if (i < precinct.cbxMin) { + precinct.cbxMin = i; + } else if (i > precinct.cbxMax) { + precinct.cbxMax = i; + } + if (j < precinct.cbyMin) { + precinct.cbxMin = j; + } else if (j > precinct.cbyMax) { + precinct.cbyMax = j; + } + } else { + precincts[precinctNumber] = precinct = { + cbxMin: i, + cbyMin: j, + cbxMax: i, + cbyMax: j + }; + } + codeblock.precinct = precinct; + } + } + subband.codeblockParameters = { + codeblockWidth: xcb_, + codeblockHeight: ycb_, + numcodeblockwide: cbx1 - cbx0 + 1, + numcodeblockhigh: cby1 - cby0 + 1 + }; + subband.codeblocks = codeblocks; + subband.precincts = precincts; + } + function createPacket(resolution, precinctNumber, layerNumber) { + var precinctCodeblocks = []; + // Section B.10.8 Order of info in packet + var subbands = resolution.subbands; + // sub-bands already ordered in 'LL', 'HL', 'LH', and 'HH' sequence + for (var i = 0, ii = subbands.length; i < ii; i++) { + var subband = subbands[i]; + var codeblocks = subband.codeblocks; + for (var j = 0, jj = codeblocks.length; j < jj; j++) { + var codeblock = codeblocks[j]; + if (codeblock.precinctNumber !== precinctNumber) { + continue; + } + precinctCodeblocks.push(codeblock); + } + } + return { + layerNumber: layerNumber, + codeblocks: precinctCodeblocks + }; + } + function LayerResolutionComponentPositionIterator(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var layersCount = tile.codingStyleDefaultParameters.layersCount; + var componentsCount = siz.Csiz; + var maxDecompositionLevelsCount = 0; + for (var q = 0; q < componentsCount; q++) { + maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, + tile.components[q].codingStyleParameters.decompositionLevelsCount); + } + + var l = 0, r = 0, i = 0, k = 0; + + this.nextPacket = function JpxImage_nextPacket() { + // Section B.12.1.1 Layer-resolution-component-position + for (; l < layersCount; l++) { + for (; r <= maxDecompositionLevelsCount; r++) { + for (; i < componentsCount; i++) { + var component = tile.components[i]; + if (r > component.codingStyleParameters.decompositionLevelsCount) { + continue; + } + + var resolution = component.resolutions[r]; + var numprecincts = resolution.precinctParameters.numprecincts; + for (; k < numprecincts;) { + var packet = createPacket(resolution, k, l); + k++; + return packet; + } + k = 0; + } + i = 0; + } + r = 0; + } + throw new Error('JPX Error: Out of packets'); + }; + } + function ResolutionLayerComponentPositionIterator(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var layersCount = tile.codingStyleDefaultParameters.layersCount; + var componentsCount = siz.Csiz; + var maxDecompositionLevelsCount = 0; + for (var q = 0; q < componentsCount; q++) { + maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, + tile.components[q].codingStyleParameters.decompositionLevelsCount); + } + + var r = 0, l = 0, i = 0, k = 0; + + this.nextPacket = function JpxImage_nextPacket() { + // Section B.12.1.2 Resolution-layer-component-position + for (; r <= maxDecompositionLevelsCount; r++) { + for (; l < layersCount; l++) { + for (; i < componentsCount; i++) { + var component = tile.components[i]; + if (r > component.codingStyleParameters.decompositionLevelsCount) { + continue; + } + + var resolution = component.resolutions[r]; + var numprecincts = resolution.precinctParameters.numprecincts; + for (; k < numprecincts;) { + var packet = createPacket(resolution, k, l); + k++; + return packet; + } + k = 0; + } + i = 0; + } + l = 0; + } + throw new Error('JPX Error: Out of packets'); + }; + } + function ResolutionPositionComponentLayerIterator(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var layersCount = tile.codingStyleDefaultParameters.layersCount; + var componentsCount = siz.Csiz; + var l, r, c, p; + var maxDecompositionLevelsCount = 0; + for (c = 0; c < componentsCount; c++) { + var component = tile.components[c]; + maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, + component.codingStyleParameters.decompositionLevelsCount); + } + var maxNumPrecinctsInLevel = new Int32Array( + maxDecompositionLevelsCount + 1); + for (r = 0; r <= maxDecompositionLevelsCount; ++r) { + var maxNumPrecincts = 0; + for (c = 0; c < componentsCount; ++c) { + var resolutions = tile.components[c].resolutions; + if (r < resolutions.length) { + maxNumPrecincts = Math.max(maxNumPrecincts, + resolutions[r].precinctParameters.numprecincts); + } + } + maxNumPrecinctsInLevel[r] = maxNumPrecincts; + } + l = 0; + r = 0; + c = 0; + p = 0; + + this.nextPacket = function JpxImage_nextPacket() { + // Section B.12.1.3 Resolution-position-component-layer + for (; r <= maxDecompositionLevelsCount; r++) { + for (; p < maxNumPrecinctsInLevel[r]; p++) { + for (; c < componentsCount; c++) { + var component = tile.components[c]; + if (r > component.codingStyleParameters.decompositionLevelsCount) { + continue; + } + var resolution = component.resolutions[r]; + var numprecincts = resolution.precinctParameters.numprecincts; + if (p >= numprecincts) { + continue; + } + for (; l < layersCount;) { + var packet = createPacket(resolution, p, l); + l++; + return packet; + } + l = 0; + } + c = 0; + } + p = 0; + } + throw new Error('JPX Error: Out of packets'); + }; + } + function PositionComponentResolutionLayerIterator(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var layersCount = tile.codingStyleDefaultParameters.layersCount; + var componentsCount = siz.Csiz; + var precinctsSizes = getPrecinctSizesInImageScale(tile); + var precinctsIterationSizes = precinctsSizes; + var l = 0, r = 0, c = 0, px = 0, py = 0; + + this.nextPacket = function JpxImage_nextPacket() { + // Section B.12.1.4 Position-component-resolution-layer + for (; py < precinctsIterationSizes.maxNumHigh; py++) { + for (; px < precinctsIterationSizes.maxNumWide; px++) { + for (; c < componentsCount; c++) { + var component = tile.components[c]; + var decompositionLevelsCount = + component.codingStyleParameters.decompositionLevelsCount; + for (; r <= decompositionLevelsCount; r++) { + var resolution = component.resolutions[r]; + var sizeInImageScale = + precinctsSizes.components[c].resolutions[r]; + var k = getPrecinctIndexIfExist( + px, + py, + sizeInImageScale, + precinctsIterationSizes, + resolution); + if (k === null) { + continue; + } + for (; l < layersCount;) { + var packet = createPacket(resolution, k, l); + l++; + return packet; + } + l = 0; + } + r = 0; + } + c = 0; + } + px = 0; + } + throw new Error('JPX Error: Out of packets'); + }; + } + function ComponentPositionResolutionLayerIterator(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var layersCount = tile.codingStyleDefaultParameters.layersCount; + var componentsCount = siz.Csiz; + var precinctsSizes = getPrecinctSizesInImageScale(tile); + var l = 0, r = 0, c = 0, px = 0, py = 0; + + this.nextPacket = function JpxImage_nextPacket() { + // Section B.12.1.5 Component-position-resolution-layer + for (; c < componentsCount; ++c) { + var component = tile.components[c]; + var precinctsIterationSizes = precinctsSizes.components[c]; + var decompositionLevelsCount = + component.codingStyleParameters.decompositionLevelsCount; + for (; py < precinctsIterationSizes.maxNumHigh; py++) { + for (; px < precinctsIterationSizes.maxNumWide; px++) { + for (; r <= decompositionLevelsCount; r++) { + var resolution = component.resolutions[r]; + var sizeInImageScale = precinctsIterationSizes.resolutions[r]; + var k = getPrecinctIndexIfExist( + px, + py, + sizeInImageScale, + precinctsIterationSizes, + resolution); + if (k === null) { + continue; + } + for (; l < layersCount;) { + var packet = createPacket(resolution, k, l); + l++; + return packet; + } + l = 0; + } + r = 0; + } + px = 0; + } + py = 0; + } + throw new Error('JPX Error: Out of packets'); + }; + } + function getPrecinctIndexIfExist( + pxIndex, pyIndex, sizeInImageScale, precinctIterationSizes, resolution) { + var posX = pxIndex * precinctIterationSizes.minWidth; + var posY = pyIndex * precinctIterationSizes.minHeight; + if (posX % sizeInImageScale.width !== 0 || + posY % sizeInImageScale.height !== 0) { + return null; + } + var startPrecinctRowIndex = + (posY / sizeInImageScale.width) * + resolution.precinctParameters.numprecinctswide; + return (posX / sizeInImageScale.height) + startPrecinctRowIndex; + } + function getPrecinctSizesInImageScale(tile) { + var componentsCount = tile.components.length; + var minWidth = Number.MAX_VALUE; + var minHeight = Number.MAX_VALUE; + var maxNumWide = 0; + var maxNumHigh = 0; + var sizePerComponent = new Array(componentsCount); + for (var c = 0; c < componentsCount; c++) { + var component = tile.components[c]; + var decompositionLevelsCount = + component.codingStyleParameters.decompositionLevelsCount; + var sizePerResolution = new Array(decompositionLevelsCount + 1); + var minWidthCurrentComponent = Number.MAX_VALUE; + var minHeightCurrentComponent = Number.MAX_VALUE; + var maxNumWideCurrentComponent = 0; + var maxNumHighCurrentComponent = 0; + var scale = 1; + for (var r = decompositionLevelsCount; r >= 0; --r) { + var resolution = component.resolutions[r]; + var widthCurrentResolution = + scale * resolution.precinctParameters.precinctWidth; + var heightCurrentResolution = + scale * resolution.precinctParameters.precinctHeight; + minWidthCurrentComponent = Math.min( + minWidthCurrentComponent, + widthCurrentResolution); + minHeightCurrentComponent = Math.min( + minHeightCurrentComponent, + heightCurrentResolution); + maxNumWideCurrentComponent = Math.max(maxNumWideCurrentComponent, + resolution.precinctParameters.numprecinctswide); + maxNumHighCurrentComponent = Math.max(maxNumHighCurrentComponent, + resolution.precinctParameters.numprecinctshigh); + sizePerResolution[r] = { + width: widthCurrentResolution, + height: heightCurrentResolution + }; + scale <<= 1; + } + minWidth = Math.min(minWidth, minWidthCurrentComponent); + minHeight = Math.min(minHeight, minHeightCurrentComponent); + maxNumWide = Math.max(maxNumWide, maxNumWideCurrentComponent); + maxNumHigh = Math.max(maxNumHigh, maxNumHighCurrentComponent); + sizePerComponent[c] = { + resolutions: sizePerResolution, + minWidth: minWidthCurrentComponent, + minHeight: minHeightCurrentComponent, + maxNumWide: maxNumWideCurrentComponent, + maxNumHigh: maxNumHighCurrentComponent + }; + } + return { + components: sizePerComponent, + minWidth: minWidth, + minHeight: minHeight, + maxNumWide: maxNumWide, + maxNumHigh: maxNumHigh + }; + } + function buildPackets(context) { + var siz = context.SIZ; + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var componentsCount = siz.Csiz; + // Creating resolutions and sub-bands for each component + for (var c = 0; c < componentsCount; c++) { + var component = tile.components[c]; + var decompositionLevelsCount = + component.codingStyleParameters.decompositionLevelsCount; + // Section B.5 Resolution levels and sub-bands + var resolutions = []; + var subbands = []; + for (var r = 0; r <= decompositionLevelsCount; r++) { + var blocksDimensions = getBlocksDimensions(context, component, r); + var resolution = {}; + var scale = 1 << (decompositionLevelsCount - r); + resolution.trx0 = Math.ceil(component.tcx0 / scale); + resolution.try0 = Math.ceil(component.tcy0 / scale); + resolution.trx1 = Math.ceil(component.tcx1 / scale); + resolution.try1 = Math.ceil(component.tcy1 / scale); + resolution.resLevel = r; + buildPrecincts(context, resolution, blocksDimensions); + resolutions.push(resolution); + + var subband; + if (r === 0) { + // one sub-band (LL) with last decomposition + subband = {}; + subband.type = 'LL'; + subband.tbx0 = Math.ceil(component.tcx0 / scale); + subband.tby0 = Math.ceil(component.tcy0 / scale); + subband.tbx1 = Math.ceil(component.tcx1 / scale); + subband.tby1 = Math.ceil(component.tcy1 / scale); + subband.resolution = resolution; + buildCodeblocks(context, subband, blocksDimensions); + subbands.push(subband); + resolution.subbands = [subband]; + } else { + var bscale = 1 << (decompositionLevelsCount - r + 1); + var resolutionSubbands = []; + // three sub-bands (HL, LH and HH) with rest of decompositions + subband = {}; + subband.type = 'HL'; + subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5); + subband.tby0 = Math.ceil(component.tcy0 / bscale); + subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5); + subband.tby1 = Math.ceil(component.tcy1 / bscale); + subband.resolution = resolution; + buildCodeblocks(context, subband, blocksDimensions); + subbands.push(subband); + resolutionSubbands.push(subband); + + subband = {}; + subband.type = 'LH'; + subband.tbx0 = Math.ceil(component.tcx0 / bscale); + subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5); + subband.tbx1 = Math.ceil(component.tcx1 / bscale); + subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5); + subband.resolution = resolution; + buildCodeblocks(context, subband, blocksDimensions); + subbands.push(subband); + resolutionSubbands.push(subband); + + subband = {}; + subband.type = 'HH'; + subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5); + subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5); + subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5); + subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5); + subband.resolution = resolution; + buildCodeblocks(context, subband, blocksDimensions); + subbands.push(subband); + resolutionSubbands.push(subband); + + resolution.subbands = resolutionSubbands; + } + } + component.resolutions = resolutions; + component.subbands = subbands; + } + // Generate the packets sequence + var progressionOrder = tile.codingStyleDefaultParameters.progressionOrder; + switch (progressionOrder) { + case 0: + tile.packetsIterator = + new LayerResolutionComponentPositionIterator(context); + break; + case 1: + tile.packetsIterator = + new ResolutionLayerComponentPositionIterator(context); + break; + case 2: + tile.packetsIterator = + new ResolutionPositionComponentLayerIterator(context); + break; + case 3: + tile.packetsIterator = + new PositionComponentResolutionLayerIterator(context); + break; + case 4: + tile.packetsIterator = + new ComponentPositionResolutionLayerIterator(context); + break; + default: + throw new Error('JPX Error: Unsupported progression order ' + + progressionOrder); + } + } + function parseTilePackets(context, data, offset, dataLength) { + var position = 0; + var buffer, bufferSize = 0, skipNextBit = false; + function readBits(count) { + while (bufferSize < count) { + var b = data[offset + position]; + position++; + if (skipNextBit) { + buffer = (buffer << 7) | b; + bufferSize += 7; + skipNextBit = false; + } else { + buffer = (buffer << 8) | b; + bufferSize += 8; + } + if (b === 0xFF) { + skipNextBit = true; + } + } + bufferSize -= count; + return (buffer >>> bufferSize) & ((1 << count) - 1); + } + function skipMarkerIfEqual(value) { + if (data[offset + position - 1] === 0xFF && + data[offset + position] === value) { + skipBytes(1); + return true; + } else if (data[offset + position] === 0xFF && + data[offset + position + 1] === value) { + skipBytes(2); + return true; + } + return false; + } + function skipBytes(count) { + position += count; + } + function alignToByte() { + bufferSize = 0; + if (skipNextBit) { + position++; + skipNextBit = false; + } + } + function readCodingpasses() { + if (readBits(1) === 0) { + return 1; + } + if (readBits(1) === 0) { + return 2; + } + var value = readBits(2); + if (value < 3) { + return value + 3; + } + value = readBits(5); + if (value < 31) { + return value + 6; + } + value = readBits(7); + return value + 37; + } + var tileIndex = context.currentTile.index; + var tile = context.tiles[tileIndex]; + var sopMarkerUsed = context.COD.sopMarkerUsed; + var ephMarkerUsed = context.COD.ephMarkerUsed; + var packetsIterator = tile.packetsIterator; + while (position < dataLength) { + alignToByte(); + if (sopMarkerUsed && skipMarkerIfEqual(0x91)) { + // Skip also marker segment length and packet sequence ID + skipBytes(4); + } + var packet = packetsIterator.nextPacket(); + if (!readBits(1)) { + continue; + } + var layerNumber = packet.layerNumber; + var queue = [], codeblock; + for (var i = 0, ii = packet.codeblocks.length; i < ii; i++) { + codeblock = packet.codeblocks[i]; + var precinct = codeblock.precinct; + var codeblockColumn = codeblock.cbx - precinct.cbxMin; + var codeblockRow = codeblock.cby - precinct.cbyMin; + var codeblockIncluded = false; + var firstTimeInclusion = false; + var valueReady; + if (codeblock['included'] !== undefined) { + codeblockIncluded = !!readBits(1); + } else { + // reading inclusion tree + precinct = codeblock.precinct; + var inclusionTree, zeroBitPlanesTree; + if (precinct['inclusionTree'] !== undefined) { + inclusionTree = precinct.inclusionTree; + } else { + // building inclusion and zero bit-planes trees + var width = precinct.cbxMax - precinct.cbxMin + 1; + var height = precinct.cbyMax - precinct.cbyMin + 1; + inclusionTree = new InclusionTree(width, height, layerNumber); + zeroBitPlanesTree = new TagTree(width, height); + precinct.inclusionTree = inclusionTree; + precinct.zeroBitPlanesTree = zeroBitPlanesTree; + } + + if (inclusionTree.reset(codeblockColumn, codeblockRow, layerNumber)) { + while (true) { + if (readBits(1)) { + valueReady = !inclusionTree.nextLevel(); + if (valueReady) { + codeblock.included = true; + codeblockIncluded = firstTimeInclusion = true; + break; + } + } else { + inclusionTree.incrementValue(layerNumber); + break; + } + } + } + } + if (!codeblockIncluded) { + continue; + } + if (firstTimeInclusion) { + zeroBitPlanesTree = precinct.zeroBitPlanesTree; + zeroBitPlanesTree.reset(codeblockColumn, codeblockRow); + while (true) { + if (readBits(1)) { + valueReady = !zeroBitPlanesTree.nextLevel(); + if (valueReady) { + break; + } + } else { + zeroBitPlanesTree.incrementValue(); + } + } + codeblock.zeroBitPlanes = zeroBitPlanesTree.value; + } + var codingpasses = readCodingpasses(); + while (readBits(1)) { + codeblock.Lblock++; + } + var codingpassesLog2 = log2(codingpasses); + // rounding down log2 + var bits = ((codingpasses < (1 << codingpassesLog2)) ? + codingpassesLog2 - 1 : codingpassesLog2) + codeblock.Lblock; + var codedDataLength = readBits(bits); + queue.push({ + codeblock: codeblock, + codingpasses: codingpasses, + dataLength: codedDataLength + }); + } + alignToByte(); + if (ephMarkerUsed) { + skipMarkerIfEqual(0x92); + } + while (queue.length > 0) { + var packetItem = queue.shift(); + codeblock = packetItem.codeblock; + if (codeblock['data'] === undefined) { + codeblock.data = []; + } + codeblock.data.push({ + data: data, + start: offset + position, + end: offset + position + packetItem.dataLength, + codingpasses: packetItem.codingpasses + }); + position += packetItem.dataLength; + } + } + return position; + } + function copyCoefficients(coefficients, levelWidth, levelHeight, subband, + delta, mb, reversible, segmentationSymbolUsed) { + var x0 = subband.tbx0; + var y0 = subband.tby0; + var width = subband.tbx1 - subband.tbx0; + var codeblocks = subband.codeblocks; + var right = subband.type.charAt(0) === 'H' ? 1 : 0; + var bottom = subband.type.charAt(1) === 'H' ? levelWidth : 0; + + for (var i = 0, ii = codeblocks.length; i < ii; ++i) { + var codeblock = codeblocks[i]; + var blockWidth = codeblock.tbx1_ - codeblock.tbx0_; + var blockHeight = codeblock.tby1_ - codeblock.tby0_; + if (blockWidth === 0 || blockHeight === 0) { + continue; + } + if (codeblock['data'] === undefined) { + continue; + } + + var bitModel, currentCodingpassType; + bitModel = new BitModel(blockWidth, blockHeight, codeblock.subbandType, + codeblock.zeroBitPlanes, mb); + currentCodingpassType = 2; // first bit plane starts from cleanup + + // collect data + var data = codeblock.data, totalLength = 0, codingpasses = 0; + var j, jj, dataItem; + for (j = 0, jj = data.length; j < jj; j++) { + dataItem = data[j]; + totalLength += dataItem.end - dataItem.start; + codingpasses += dataItem.codingpasses; + } + var encodedData = new Uint8Array(totalLength); + var position = 0; + for (j = 0, jj = data.length; j < jj; j++) { + dataItem = data[j]; + var chunk = dataItem.data.subarray(dataItem.start, dataItem.end); + encodedData.set(chunk, position); + position += chunk.length; + } + // decoding the item + var decoder = new ArithmeticDecoder(encodedData, 0, totalLength); + bitModel.setDecoder(decoder); + + for (j = 0; j < codingpasses; j++) { + switch (currentCodingpassType) { + case 0: + bitModel.runSignificancePropogationPass(); + break; + case 1: + bitModel.runMagnitudeRefinementPass(); + break; + case 2: + bitModel.runCleanupPass(); + if (segmentationSymbolUsed) { + bitModel.checkSegmentationSymbol(); + } + break; + } + currentCodingpassType = (currentCodingpassType + 1) % 3; + } + + var offset = (codeblock.tbx0_ - x0) + (codeblock.tby0_ - y0) * width; + var sign = bitModel.coefficentsSign; + var magnitude = bitModel.coefficentsMagnitude; + var bitsDecoded = bitModel.bitsDecoded; + var magnitudeCorrection = reversible ? 0 : 0.5; + var k, n, nb; + position = 0; + // Do the interleaving of Section F.3.3 here, so we do not need + // to copy later. LL level is not interleaved, just copied. + var interleave = (subband.type !== 'LL'); + for (j = 0; j < blockHeight; j++) { + var row = (offset / width) | 0; // row in the non-interleaved subband + var levelOffset = 2 * row * (levelWidth - width) + right + bottom; + for (k = 0; k < blockWidth; k++) { + n = magnitude[position]; + if (n !== 0) { + n = (n + magnitudeCorrection) * delta; + if (sign[position] !== 0) { + n = -n; + } + nb = bitsDecoded[position]; + var pos = interleave ? (levelOffset + (offset << 1)) : offset; + if (reversible && (nb >= mb)) { + coefficients[pos] = n; + } else { + coefficients[pos] = n * (1 << (mb - nb)); + } + } + offset++; + position++; + } + offset += width - blockWidth; + } + } + } + function transformTile(context, tile, c) { + var component = tile.components[c]; + var codingStyleParameters = component.codingStyleParameters; + var quantizationParameters = component.quantizationParameters; + var decompositionLevelsCount = + codingStyleParameters.decompositionLevelsCount; + var spqcds = quantizationParameters.SPqcds; + var scalarExpounded = quantizationParameters.scalarExpounded; + var guardBits = quantizationParameters.guardBits; + var segmentationSymbolUsed = codingStyleParameters.segmentationSymbolUsed; + var precision = context.components[c].precision; + + var reversible = codingStyleParameters.reversibleTransformation; + var transform = (reversible ? new ReversibleTransform() : + new IrreversibleTransform()); + + var subbandCoefficients = []; + var b = 0; + for (var i = 0; i <= decompositionLevelsCount; i++) { + var resolution = component.resolutions[i]; + + var width = resolution.trx1 - resolution.trx0; + var height = resolution.try1 - resolution.try0; + // Allocate space for the whole sublevel. + var coefficients = new Float32Array(width * height); + + for (var j = 0, jj = resolution.subbands.length; j < jj; j++) { + var mu, epsilon; + if (!scalarExpounded) { + // formula E-5 + mu = spqcds[0].mu; + epsilon = spqcds[0].epsilon + (i > 0 ? 1 - i : 0); + } else { + mu = spqcds[b].mu; + epsilon = spqcds[b].epsilon; + b++; + } + + var subband = resolution.subbands[j]; + var gainLog2 = SubbandsGainLog2[subband.type]; + + // calulate quantization coefficient (Section E.1.1.1) + var delta = (reversible ? 1 : + Math.pow(2, precision + gainLog2 - epsilon) * (1 + mu / 2048)); + var mb = (guardBits + epsilon - 1); + + // In the first resolution level, copyCoefficients will fill the + // whole array with coefficients. In the succeding passes, + // copyCoefficients will consecutively fill in the values that belong + // to the interleaved positions of the HL, LH, and HH coefficients. + // The LL coefficients will then be interleaved in Transform.iterate(). + copyCoefficients(coefficients, width, height, subband, delta, mb, + reversible, segmentationSymbolUsed); + } + subbandCoefficients.push({ + width: width, + height: height, + items: coefficients + }); + } + + var result = transform.calculate(subbandCoefficients, + component.tcx0, component.tcy0); + return { + left: component.tcx0, + top: component.tcy0, + width: result.width, + height: result.height, + items: result.items + }; + } + function transformComponents(context) { + var siz = context.SIZ; + var components = context.components; + var componentsCount = siz.Csiz; + var resultImages = []; + for (var i = 0, ii = context.tiles.length; i < ii; i++) { + var tile = context.tiles[i]; + var transformedTiles = []; + var c; + for (c = 0; c < componentsCount; c++) { + transformedTiles[c] = transformTile(context, tile, c); + } + var tile0 = transformedTiles[0]; + var out = new Uint8Array(tile0.items.length * componentsCount); + var result = { + left: tile0.left, + top: tile0.top, + width: tile0.width, + height: tile0.height, + items: out + }; + + // Section G.2.2 Inverse multi component transform + var shift, offset, max, min, maxK; + var pos = 0, j, jj, y0, y1, y2, r, g, b, k, val; + if (tile.codingStyleDefaultParameters.multipleComponentTransform) { + var fourComponents = componentsCount === 4; + var y0items = transformedTiles[0].items; + var y1items = transformedTiles[1].items; + var y2items = transformedTiles[2].items; + var y3items = fourComponents ? transformedTiles[3].items : null; + + // HACK: The multiple component transform formulas below assume that + // all components have the same precision. With this in mind, we + // compute shift and offset only once. + shift = components[0].precision - 8; + offset = (128 << shift) + 0.5; + max = 255 * (1 << shift); + maxK = max * 0.5; + min = -maxK; + + var component0 = tile.components[0]; + var alpha01 = componentsCount - 3; + jj = y0items.length; + if (!component0.codingStyleParameters.reversibleTransformation) { + // inverse irreversible multiple component transform + for (j = 0; j < jj; j++, pos += alpha01) { + y0 = y0items[j] + offset; + y1 = y1items[j]; + y2 = y2items[j]; + r = y0 + 1.402 * y2; + g = y0 - 0.34413 * y1 - 0.71414 * y2; + b = y0 + 1.772 * y1; + out[pos++] = r <= 0 ? 0 : r >= max ? 255 : r >> shift; + out[pos++] = g <= 0 ? 0 : g >= max ? 255 : g >> shift; + out[pos++] = b <= 0 ? 0 : b >= max ? 255 : b >> shift; + } + } else { + // inverse reversible multiple component transform + for (j = 0; j < jj; j++, pos += alpha01) { + y0 = y0items[j] + offset; + y1 = y1items[j]; + y2 = y2items[j]; + g = y0 - ((y2 + y1) >> 2); + r = g + y2; + b = g + y1; + out[pos++] = r <= 0 ? 0 : r >= max ? 255 : r >> shift; + out[pos++] = g <= 0 ? 0 : g >= max ? 255 : g >> shift; + out[pos++] = b <= 0 ? 0 : b >= max ? 255 : b >> shift; + } + } + if (fourComponents) { + for (j = 0, pos = 3; j < jj; j++, pos += 4) { + k = y3items[j]; + out[pos] = k <= min ? 0 : k >= maxK ? 255 : (k + offset) >> shift; + } + } + } else { // no multi-component transform + for (c = 0; c < componentsCount; c++) { + var items = transformedTiles[c].items; + shift = components[c].precision - 8; + offset = (128 << shift) + 0.5; + max = (127.5 * (1 << shift)); + min = -max; + for (pos = c, j = 0, jj = items.length; j < jj; j++) { + val = items[j]; + out[pos] = val <= min ? 0 : + val >= max ? 255 : (val + offset) >> shift; + pos += componentsCount; + } + } + } + resultImages.push(result); + } + return resultImages; + } + function initializeTile(context, tileIndex) { + var siz = context.SIZ; + var componentsCount = siz.Csiz; + var tile = context.tiles[tileIndex]; + for (var c = 0; c < componentsCount; c++) { + var component = tile.components[c]; + var qcdOrQcc = (context.currentTile.QCC[c] !== undefined ? + context.currentTile.QCC[c] : context.currentTile.QCD); + component.quantizationParameters = qcdOrQcc; + var codOrCoc = (context.currentTile.COC[c] !== undefined ? + context.currentTile.COC[c] : context.currentTile.COD); + component.codingStyleParameters = codOrCoc; + } + tile.codingStyleDefaultParameters = context.currentTile.COD; + } + + // Section B.10.2 Tag trees + var TagTree = (function TagTreeClosure() { + function TagTree(width, height) { + var levelsLength = log2(Math.max(width, height)) + 1; + this.levels = []; + for (var i = 0; i < levelsLength; i++) { + var level = { + width: width, + height: height, + items: [] + }; + this.levels.push(level); + width = Math.ceil(width / 2); + height = Math.ceil(height / 2); + } + } + TagTree.prototype = { + reset: function TagTree_reset(i, j) { + var currentLevel = 0, value = 0, level; + while (currentLevel < this.levels.length) { + level = this.levels[currentLevel]; + var index = i + j * level.width; + if (level.items[index] !== undefined) { + value = level.items[index]; + break; + } + level.index = index; + i >>= 1; + j >>= 1; + currentLevel++; + } + currentLevel--; + level = this.levels[currentLevel]; + level.items[level.index] = value; + this.currentLevel = currentLevel; + delete this.value; + }, + incrementValue: function TagTree_incrementValue() { + var level = this.levels[this.currentLevel]; + level.items[level.index]++; + }, + nextLevel: function TagTree_nextLevel() { + var currentLevel = this.currentLevel; + var level = this.levels[currentLevel]; + var value = level.items[level.index]; + currentLevel--; + if (currentLevel < 0) { + this.value = value; + return false; + } + + this.currentLevel = currentLevel; + level = this.levels[currentLevel]; + level.items[level.index] = value; + return true; + } + }; + return TagTree; + })(); + + var InclusionTree = (function InclusionTreeClosure() { + function InclusionTree(width, height, defaultValue) { + var levelsLength = log2(Math.max(width, height)) + 1; + this.levels = []; + for (var i = 0; i < levelsLength; i++) { + var items = new Uint8Array(width * height); + for (var j = 0, jj = items.length; j < jj; j++) { + items[j] = defaultValue; + } + + var level = { + width: width, + height: height, + items: items + }; + this.levels.push(level); + + width = Math.ceil(width / 2); + height = Math.ceil(height / 2); + } + } + InclusionTree.prototype = { + reset: function InclusionTree_reset(i, j, stopValue) { + var currentLevel = 0; + while (currentLevel < this.levels.length) { + var level = this.levels[currentLevel]; + var index = i + j * level.width; + level.index = index; + var value = level.items[index]; + + if (value === 0xFF) { + break; + } + + if (value > stopValue) { + this.currentLevel = currentLevel; + // already know about this one, propagating the value to top levels + this.propagateValues(); + return false; + } + + i >>= 1; + j >>= 1; + currentLevel++; + } + this.currentLevel = currentLevel - 1; + return true; + }, + incrementValue: function InclusionTree_incrementValue(stopValue) { + var level = this.levels[this.currentLevel]; + level.items[level.index] = stopValue + 1; + this.propagateValues(); + }, + propagateValues: function InclusionTree_propagateValues() { + var levelIndex = this.currentLevel; + var level = this.levels[levelIndex]; + var currentValue = level.items[level.index]; + while (--levelIndex >= 0) { + level = this.levels[levelIndex]; + level.items[level.index] = currentValue; + } + }, + nextLevel: function InclusionTree_nextLevel() { + var currentLevel = this.currentLevel; + var level = this.levels[currentLevel]; + var value = level.items[level.index]; + level.items[level.index] = 0xFF; + currentLevel--; + if (currentLevel < 0) { + return false; + } + + this.currentLevel = currentLevel; + level = this.levels[currentLevel]; + level.items[level.index] = value; + return true; + } + }; + return InclusionTree; + })(); + + // Section D. Coefficient bit modeling + var BitModel = (function BitModelClosure() { + var UNIFORM_CONTEXT = 17; + var RUNLENGTH_CONTEXT = 18; + // Table D-1 + // The index is binary presentation: 0dddvvhh, ddd - sum of Di (0..4), + // vv - sum of Vi (0..2), and hh - sum of Hi (0..2) + var LLAndLHContextsLabel = new Uint8Array([ + 0, 5, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 1, 6, 8, 0, 3, 7, 8, 0, 4, + 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, + 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8 + ]); + var HLContextLabel = new Uint8Array([ + 0, 3, 4, 0, 5, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 1, 3, 4, 0, 6, 7, 7, 0, 8, + 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, + 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8 + ]); + var HHContextLabel = new Uint8Array([ + 0, 1, 2, 0, 1, 2, 2, 0, 2, 2, 2, 0, 0, 0, 0, 0, 3, 4, 5, 0, 4, 5, 5, 0, 5, + 5, 5, 0, 0, 0, 0, 0, 6, 7, 7, 0, 7, 7, 7, 0, 7, 7, 7, 0, 0, 0, 0, 0, 8, 8, + 8, 0, 8, 8, 8, 0, 8, 8, 8, 0, 0, 0, 0, 0, 8, 8, 8, 0, 8, 8, 8, 0, 8, 8, 8 + ]); + + function BitModel(width, height, subband, zeroBitPlanes, mb) { + this.width = width; + this.height = height; + + this.contextLabelTable = (subband === 'HH' ? HHContextLabel : + (subband === 'HL' ? HLContextLabel : LLAndLHContextsLabel)); + + var coefficientCount = width * height; + + // coefficients outside the encoding region treated as insignificant + // add border state cells for significanceState + this.neighborsSignificance = new Uint8Array(coefficientCount); + this.coefficentsSign = new Uint8Array(coefficientCount); + this.coefficentsMagnitude = mb > 14 ? new Uint32Array(coefficientCount) : + mb > 6 ? new Uint16Array(coefficientCount) : + new Uint8Array(coefficientCount); + this.processingFlags = new Uint8Array(coefficientCount); + + var bitsDecoded = new Uint8Array(coefficientCount); + if (zeroBitPlanes !== 0) { + for (var i = 0; i < coefficientCount; i++) { + bitsDecoded[i] = zeroBitPlanes; + } + } + this.bitsDecoded = bitsDecoded; + + this.reset(); + } + + BitModel.prototype = { + setDecoder: function BitModel_setDecoder(decoder) { + this.decoder = decoder; + }, + reset: function BitModel_reset() { + // We have 17 contexts that are accessed via context labels, + // plus the uniform and runlength context. + this.contexts = new Int8Array(19); + + // Contexts are packed into 1 byte: + // highest 7 bits carry the index, lowest bit carries mps + this.contexts[0] = (4 << 1) | 0; + this.contexts[UNIFORM_CONTEXT] = (46 << 1) | 0; + this.contexts[RUNLENGTH_CONTEXT] = (3 << 1) | 0; + }, + setNeighborsSignificance: + function BitModel_setNeighborsSignificance(row, column, index) { + var neighborsSignificance = this.neighborsSignificance; + var width = this.width, height = this.height; + var left = (column > 0); + var right = (column + 1 < width); + var i; + + if (row > 0) { + i = index - width; + if (left) { + neighborsSignificance[i - 1] += 0x10; + } + if (right) { + neighborsSignificance[i + 1] += 0x10; + } + neighborsSignificance[i] += 0x04; + } + + if (row + 1 < height) { + i = index + width; + if (left) { + neighborsSignificance[i - 1] += 0x10; + } + if (right) { + neighborsSignificance[i + 1] += 0x10; + } + neighborsSignificance[i] += 0x04; + } + + if (left) { + neighborsSignificance[index - 1] += 0x01; + } + if (right) { + neighborsSignificance[index + 1] += 0x01; + } + neighborsSignificance[index] |= 0x80; + }, + runSignificancePropogationPass: + function BitModel_runSignificancePropogationPass() { + var decoder = this.decoder; + var width = this.width, height = this.height; + var coefficentsMagnitude = this.coefficentsMagnitude; + var coefficentsSign = this.coefficentsSign; + var neighborsSignificance = this.neighborsSignificance; + var processingFlags = this.processingFlags; + var contexts = this.contexts; + var labels = this.contextLabelTable; + var bitsDecoded = this.bitsDecoded; + var processedInverseMask = ~1; + var processedMask = 1; + var firstMagnitudeBitMask = 2; + + for (var i0 = 0; i0 < height; i0 += 4) { + for (var j = 0; j < width; j++) { + var index = i0 * width + j; + for (var i1 = 0; i1 < 4; i1++, index += width) { + var i = i0 + i1; + if (i >= height) { + break; + } + // clear processed flag first + processingFlags[index] &= processedInverseMask; + + if (coefficentsMagnitude[index] || + !neighborsSignificance[index]) { + continue; + } + + var contextLabel = labels[neighborsSignificance[index]]; + var decision = decoder.readBit(contexts, contextLabel); + if (decision) { + var sign = this.decodeSignBit(i, j, index); + coefficentsSign[index] = sign; + coefficentsMagnitude[index] = 1; + this.setNeighborsSignificance(i, j, index); + processingFlags[index] |= firstMagnitudeBitMask; + } + bitsDecoded[index]++; + processingFlags[index] |= processedMask; + } + } + } + }, + decodeSignBit: function BitModel_decodeSignBit(row, column, index) { + var width = this.width, height = this.height; + var coefficentsMagnitude = this.coefficentsMagnitude; + var coefficentsSign = this.coefficentsSign; + var contribution, sign0, sign1, significance1; + var contextLabel, decoded; + + // calculate horizontal contribution + significance1 = (column > 0 && coefficentsMagnitude[index - 1] !== 0); + if (column + 1 < width && coefficentsMagnitude[index + 1] !== 0) { + sign1 = coefficentsSign[index + 1]; + if (significance1) { + sign0 = coefficentsSign[index - 1]; + contribution = 1 - sign1 - sign0; + } else { + contribution = 1 - sign1 - sign1; + } + } else if (significance1) { + sign0 = coefficentsSign[index - 1]; + contribution = 1 - sign0 - sign0; + } else { + contribution = 0; + } + var horizontalContribution = 3 * contribution; + + // calculate vertical contribution and combine with the horizontal + significance1 = (row > 0 && coefficentsMagnitude[index - width] !== 0); + if (row + 1 < height && coefficentsMagnitude[index + width] !== 0) { + sign1 = coefficentsSign[index + width]; + if (significance1) { + sign0 = coefficentsSign[index - width]; + contribution = 1 - sign1 - sign0 + horizontalContribution; + } else { + contribution = 1 - sign1 - sign1 + horizontalContribution; + } + } else if (significance1) { + sign0 = coefficentsSign[index - width]; + contribution = 1 - sign0 - sign0 + horizontalContribution; + } else { + contribution = horizontalContribution; + } + + if (contribution >= 0) { + contextLabel = 9 + contribution; + decoded = this.decoder.readBit(this.contexts, contextLabel); + } else { + contextLabel = 9 - contribution; + decoded = this.decoder.readBit(this.contexts, contextLabel) ^ 1; + } + return decoded; + }, + runMagnitudeRefinementPass: + function BitModel_runMagnitudeRefinementPass() { + var decoder = this.decoder; + var width = this.width, height = this.height; + var coefficentsMagnitude = this.coefficentsMagnitude; + var neighborsSignificance = this.neighborsSignificance; + var contexts = this.contexts; + var bitsDecoded = this.bitsDecoded; + var processingFlags = this.processingFlags; + var processedMask = 1; + var firstMagnitudeBitMask = 2; + var length = width * height; + var width4 = width * 4; + + for (var index0 = 0, indexNext; index0 < length; index0 = indexNext) { + indexNext = Math.min(length, index0 + width4); + for (var j = 0; j < width; j++) { + for (var index = index0 + j; index < indexNext; index += width) { + + // significant but not those that have just become + if (!coefficentsMagnitude[index] || + (processingFlags[index] & processedMask) !== 0) { + continue; + } + + var contextLabel = 16; + if ((processingFlags[index] & firstMagnitudeBitMask) !== 0) { + processingFlags[index] ^= firstMagnitudeBitMask; + // first refinement + var significance = neighborsSignificance[index] & 127; + contextLabel = significance === 0 ? 15 : 14; + } + + var bit = decoder.readBit(contexts, contextLabel); + coefficentsMagnitude[index] = + (coefficentsMagnitude[index] << 1) | bit; + bitsDecoded[index]++; + processingFlags[index] |= processedMask; + } + } + } + }, + runCleanupPass: function BitModel_runCleanupPass() { + var decoder = this.decoder; + var width = this.width, height = this.height; + var neighborsSignificance = this.neighborsSignificance; + var coefficentsMagnitude = this.coefficentsMagnitude; + var coefficentsSign = this.coefficentsSign; + var contexts = this.contexts; + var labels = this.contextLabelTable; + var bitsDecoded = this.bitsDecoded; + var processingFlags = this.processingFlags; + var processedMask = 1; + var firstMagnitudeBitMask = 2; + var oneRowDown = width; + var twoRowsDown = width * 2; + var threeRowsDown = width * 3; + var iNext; + for (var i0 = 0; i0 < height; i0 = iNext) { + iNext = Math.min(i0 + 4, height); + var indexBase = i0 * width; + var checkAllEmpty = i0 + 3 < height; + for (var j = 0; j < width; j++) { + var index0 = indexBase + j; + // using the property: labels[neighborsSignificance[index]] === 0 + // when neighborsSignificance[index] === 0 + var allEmpty = (checkAllEmpty && + processingFlags[index0] === 0 && + processingFlags[index0 + oneRowDown] === 0 && + processingFlags[index0 + twoRowsDown] === 0 && + processingFlags[index0 + threeRowsDown] === 0 && + neighborsSignificance[index0] === 0 && + neighborsSignificance[index0 + oneRowDown] === 0 && + neighborsSignificance[index0 + twoRowsDown] === 0 && + neighborsSignificance[index0 + threeRowsDown] === 0); + var i1 = 0, index = index0; + var i = i0, sign; + if (allEmpty) { + var hasSignificantCoefficent = + decoder.readBit(contexts, RUNLENGTH_CONTEXT); + if (!hasSignificantCoefficent) { + bitsDecoded[index0]++; + bitsDecoded[index0 + oneRowDown]++; + bitsDecoded[index0 + twoRowsDown]++; + bitsDecoded[index0 + threeRowsDown]++; + continue; // next column + } + i1 = (decoder.readBit(contexts, UNIFORM_CONTEXT) << 1) | + decoder.readBit(contexts, UNIFORM_CONTEXT); + if (i1 !== 0) { + i = i0 + i1; + index += i1 * width; + } + + sign = this.decodeSignBit(i, j, index); + coefficentsSign[index] = sign; + coefficentsMagnitude[index] = 1; + this.setNeighborsSignificance(i, j, index); + processingFlags[index] |= firstMagnitudeBitMask; + + index = index0; + for (var i2 = i0; i2 <= i; i2++, index += width) { + bitsDecoded[index]++; + } + + i1++; + } + for (i = i0 + i1; i < iNext; i++, index += width) { + if (coefficentsMagnitude[index] || + (processingFlags[index] & processedMask) !== 0) { + continue; + } + + var contextLabel = labels[neighborsSignificance[index]]; + var decision = decoder.readBit(contexts, contextLabel); + if (decision === 1) { + sign = this.decodeSignBit(i, j, index); + coefficentsSign[index] = sign; + coefficentsMagnitude[index] = 1; + this.setNeighborsSignificance(i, j, index); + processingFlags[index] |= firstMagnitudeBitMask; + } + bitsDecoded[index]++; + } + } + } + }, + checkSegmentationSymbol: function BitModel_checkSegmentationSymbol() { + var decoder = this.decoder; + var contexts = this.contexts; + var symbol = (decoder.readBit(contexts, UNIFORM_CONTEXT) << 3) | + (decoder.readBit(contexts, UNIFORM_CONTEXT) << 2) | + (decoder.readBit(contexts, UNIFORM_CONTEXT) << 1) | + decoder.readBit(contexts, UNIFORM_CONTEXT); + if (symbol !== 0xA) { + throw new Error('JPX Error: Invalid segmentation symbol'); + } + } + }; + + return BitModel; + })(); + + // Section F, Discrete wavelet transformation + var Transform = (function TransformClosure() { + function Transform() {} + + Transform.prototype.calculate = + function transformCalculate(subbands, u0, v0) { + var ll = subbands[0]; + for (var i = 1, ii = subbands.length; i < ii; i++) { + ll = this.iterate(ll, subbands[i], u0, v0); + } + return ll; + }; + Transform.prototype.extend = function extend(buffer, offset, size) { + // Section F.3.7 extending... using max extension of 4 + var i1 = offset - 1, j1 = offset + 1; + var i2 = offset + size - 2, j2 = offset + size; + buffer[i1--] = buffer[j1++]; + buffer[j2++] = buffer[i2--]; + buffer[i1--] = buffer[j1++]; + buffer[j2++] = buffer[i2--]; + buffer[i1--] = buffer[j1++]; + buffer[j2++] = buffer[i2--]; + buffer[i1] = buffer[j1]; + buffer[j2] = buffer[i2]; + }; + Transform.prototype.iterate = function Transform_iterate(ll, hl_lh_hh, + u0, v0) { + var llWidth = ll.width, llHeight = ll.height, llItems = ll.items; + var width = hl_lh_hh.width; + var height = hl_lh_hh.height; + var items = hl_lh_hh.items; + var i, j, k, l, u, v; + + // Interleave LL according to Section F.3.3 + for (k = 0, i = 0; i < llHeight; i++) { + l = i * 2 * width; + for (j = 0; j < llWidth; j++, k++, l += 2) { + items[l] = llItems[k]; + } + } + // The LL band is not needed anymore. + llItems = ll.items = null; + + var bufferPadding = 4; + var rowBuffer = new Float32Array(width + 2 * bufferPadding); + + // Section F.3.4 HOR_SR + if (width === 1) { + // if width = 1, when u0 even keep items as is, when odd divide by 2 + if ((u0 & 1) !== 0) { + for (v = 0, k = 0; v < height; v++, k += width) { + items[k] *= 0.5; + } + } + } else { + for (v = 0, k = 0; v < height; v++, k += width) { + rowBuffer.set(items.subarray(k, k + width), bufferPadding); + + this.extend(rowBuffer, bufferPadding, width); + this.filter(rowBuffer, bufferPadding, width); + + items.set( + rowBuffer.subarray(bufferPadding, bufferPadding + width), + k); + } + } + + // Accesses to the items array can take long, because it may not fit into + // CPU cache and has to be fetched from main memory. Since subsequent + // accesses to the items array are not local when reading columns, we + // have a cache miss every time. To reduce cache misses, get up to + // 'numBuffers' items at a time and store them into the individual + // buffers. The colBuffers should be small enough to fit into CPU cache. + var numBuffers = 16; + var colBuffers = []; + for (i = 0; i < numBuffers; i++) { + colBuffers.push(new Float32Array(height + 2 * bufferPadding)); + } + var b, currentBuffer = 0; + ll = bufferPadding + height; + + // Section F.3.5 VER_SR + if (height === 1) { + // if height = 1, when v0 even keep items as is, when odd divide by 2 + if ((v0 & 1) !== 0) { + for (u = 0; u < width; u++) { + items[u] *= 0.5; + } + } + } else { + for (u = 0; u < width; u++) { + // if we ran out of buffers, copy several image columns at once + if (currentBuffer === 0) { + numBuffers = Math.min(width - u, numBuffers); + for (k = u, l = bufferPadding; l < ll; k += width, l++) { + for (b = 0; b < numBuffers; b++) { + colBuffers[b][l] = items[k + b]; + } + } + currentBuffer = numBuffers; + } + + currentBuffer--; + var buffer = colBuffers[currentBuffer]; + this.extend(buffer, bufferPadding, height); + this.filter(buffer, bufferPadding, height); + + // If this is last buffer in this group of buffers, flush all buffers. + if (currentBuffer === 0) { + k = u - numBuffers + 1; + for (l = bufferPadding; l < ll; k += width, l++) { + for (b = 0; b < numBuffers; b++) { + items[k + b] = colBuffers[b][l]; + } + } + } + } + } + + return { + width: width, + height: height, + items: items + }; + }; + return Transform; + })(); + + // Section 3.8.2 Irreversible 9-7 filter + var IrreversibleTransform = (function IrreversibleTransformClosure() { + function IrreversibleTransform() { + Transform.call(this); + } + + IrreversibleTransform.prototype = Object.create(Transform.prototype); + IrreversibleTransform.prototype.filter = + function irreversibleTransformFilter(x, offset, length) { + var len = length >> 1; + offset = offset | 0; + var j, n, current, next; + + var alpha = -1.586134342059924; + var beta = -0.052980118572961; + var gamma = 0.882911075530934; + var delta = 0.443506852043971; + var K = 1.230174104914001; + var K_ = 1 / K; + + // step 1 is combined with step 3 + + // step 2 + j = offset - 3; + for (n = len + 4; n--; j += 2) { + x[j] *= K_; + } + + // step 1 & 3 + j = offset - 2; + current = delta * x[j -1]; + for (n = len + 3; n--; j += 2) { + next = delta * x[j + 1]; + x[j] = K * x[j] - current - next; + if (n--) { + j += 2; + current = delta * x[j + 1]; + x[j] = K * x[j] - current - next; + } else { + break; + } + } + + // step 4 + j = offset - 1; + current = gamma * x[j - 1]; + for (n = len + 2; n--; j += 2) { + next = gamma * x[j + 1]; + x[j] -= current + next; + if (n--) { + j += 2; + current = gamma * x[j + 1]; + x[j] -= current + next; + } else { + break; + } + } + + // step 5 + j = offset; + current = beta * x[j - 1]; + for (n = len + 1; n--; j += 2) { + next = beta * x[j + 1]; + x[j] -= current + next; + if (n--) { + j += 2; + current = beta * x[j + 1]; + x[j] -= current + next; + } else { + break; + } + } + + // step 6 + if (len !== 0) { + j = offset + 1; + current = alpha * x[j - 1]; + for (n = len; n--; j += 2) { + next = alpha * x[j + 1]; + x[j] -= current + next; + if (n--) { + j += 2; + current = alpha * x[j + 1]; + x[j] -= current + next; + } else { + break; + } + } + } + }; + + return IrreversibleTransform; + })(); + + // Section 3.8.1 Reversible 5-3 filter + var ReversibleTransform = (function ReversibleTransformClosure() { + function ReversibleTransform() { + Transform.call(this); + } + + ReversibleTransform.prototype = Object.create(Transform.prototype); + ReversibleTransform.prototype.filter = + function reversibleTransformFilter(x, offset, length) { + var len = length >> 1; + offset = offset | 0; + var j, n; + + for (j = offset, n = len + 1; n--; j += 2) { + x[j] -= (x[j - 1] + x[j + 1] + 2) >> 2; + } + + for (j = offset + 1, n = len; n--; j += 2) { + x[j] += (x[j - 1] + x[j + 1]) >> 1; + } + }; + + return ReversibleTransform; + })(); + + return JpxImage; +})(); + +exports.JpxImage = JpxImage; +})); + + + +(function (root, factory) { + { + factory((root.pdfjsCoreMurmurHash3 = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { + +var Uint32ArrayView = sharedUtil.Uint32ArrayView; + +var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) { + // Workaround for missing math precison in JS. + var MASK_HIGH = 0xffff0000; + var MASK_LOW = 0xffff; + + function MurmurHash3_64 (seed) { + var SEED = 0xc3d2e1f0; + this.h1 = seed ? seed & 0xffffffff : SEED; + this.h2 = seed ? seed & 0xffffffff : SEED; + } + + var alwaysUseUint32ArrayView = false; + // old webkits have issues with non-aligned arrays + try { + new Uint32Array(new Uint8Array(5).buffer, 0, 1); + } catch (e) { + alwaysUseUint32ArrayView = true; + } + + MurmurHash3_64.prototype = { + update: function MurmurHash3_64_update(input) { + var useUint32ArrayView = alwaysUseUint32ArrayView; + var i; + if (typeof input === 'string') { + var data = new Uint8Array(input.length * 2); + var length = 0; + for (i = 0; i < input.length; i++) { + var code = input.charCodeAt(i); + if (code <= 0xff) { + data[length++] = code; + } + else { + data[length++] = code >>> 8; + data[length++] = code & 0xff; + } + } + } else if (input instanceof Uint8Array) { + data = input; + length = data.length; + } else if (typeof input === 'object' && ('length' in input)) { + // processing regular arrays as well, e.g. for IE9 + data = input; + length = data.length; + useUint32ArrayView = true; + } else { + throw new Error('Wrong data format in MurmurHash3_64_update. ' + + 'Input must be a string or array.'); + } + + var blockCounts = length >> 2; + var tailLength = length - blockCounts * 4; + // we don't care about endianness here + var dataUint32 = useUint32ArrayView ? + new Uint32ArrayView(data, blockCounts) : + new Uint32Array(data.buffer, 0, blockCounts); + var k1 = 0; + var k2 = 0; + var h1 = this.h1; + var h2 = this.h2; + var C1 = 0xcc9e2d51; + var C2 = 0x1b873593; + var C1_LOW = C1 & MASK_LOW; + var C2_LOW = C2 & MASK_LOW; + + for (i = 0; i < blockCounts; i++) { + if (i & 1) { + k1 = dataUint32[i]; + k1 = (k1 * C1 & MASK_HIGH) | (k1 * C1_LOW & MASK_LOW); + k1 = k1 << 15 | k1 >>> 17; + k1 = (k1 * C2 & MASK_HIGH) | (k1 * C2_LOW & MASK_LOW); + h1 ^= k1; + h1 = h1 << 13 | h1 >>> 19; + h1 = h1 * 5 + 0xe6546b64; + } else { + k2 = dataUint32[i]; + k2 = (k2 * C1 & MASK_HIGH) | (k2 * C1_LOW & MASK_LOW); + k2 = k2 << 15 | k2 >>> 17; + k2 = (k2 * C2 & MASK_HIGH) | (k2 * C2_LOW & MASK_LOW); + h2 ^= k2; + h2 = h2 << 13 | h2 >>> 19; + h2 = h2 * 5 + 0xe6546b64; + } + } + + k1 = 0; + + switch (tailLength) { + case 3: + k1 ^= data[blockCounts * 4 + 2] << 16; + /* falls through */ + case 2: + k1 ^= data[blockCounts * 4 + 1] << 8; + /* falls through */ + case 1: + k1 ^= data[blockCounts * 4]; + /* falls through */ + k1 = (k1 * C1 & MASK_HIGH) | (k1 * C1_LOW & MASK_LOW); + k1 = k1 << 15 | k1 >>> 17; + k1 = (k1 * C2 & MASK_HIGH) | (k1 * C2_LOW & MASK_LOW); + if (blockCounts & 1) { + h1 ^= k1; + } else { + h2 ^= k1; + } + } + + this.h1 = h1; + this.h2 = h2; + return this; + }, + + hexdigest: function MurmurHash3_64_hexdigest () { + var h1 = this.h1; + var h2 = this.h2; + + h1 ^= h2 >>> 1; + h1 = (h1 * 0xed558ccd & MASK_HIGH) | (h1 * 0x8ccd & MASK_LOW); + h2 = (h2 * 0xff51afd7 & MASK_HIGH) | + (((h2 << 16 | h1 >>> 16) * 0xafd7ed55 & MASK_HIGH) >>> 16); + h1 ^= h2 >>> 1; + h1 = (h1 * 0x1a85ec53 & MASK_HIGH) | (h1 * 0xec53 & MASK_LOW); + h2 = (h2 * 0xc4ceb9fe & MASK_HIGH) | + (((h2 << 16 | h1 >>> 16) * 0xb9fe1a85 & MASK_HIGH) >>> 16); + h1 ^= h2 >>> 1; + + for (var i = 0, arr = [h1, h2], str = ''; i < arr.length; i++) { + var hex = (arr[i] >>> 0).toString(16); + while (hex.length < 8) { + hex = '0' + hex; + } + str += hex; + } + + return str; + } + }; + + return MurmurHash3_64; +})(); + +exports.MurmurHash3_64 = MurmurHash3_64; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCorePrimitives = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { + +var isArray = sharedUtil.isArray; + +var Name = (function NameClosure() { + function Name(name) { + this.name = name; + } + + Name.prototype = {}; + + var nameCache = {}; + + Name.get = function Name_get(name) { + var nameValue = nameCache[name]; + return (nameValue ? nameValue : (nameCache[name] = new Name(name))); + }; + + return Name; +})(); + +var Cmd = (function CmdClosure() { + function Cmd(cmd) { + this.cmd = cmd; + } + + Cmd.prototype = {}; + + var cmdCache = {}; + + Cmd.get = function Cmd_get(cmd) { + var cmdValue = cmdCache[cmd]; + return (cmdValue ? cmdValue : (cmdCache[cmd] = new Cmd(cmd))); + }; + + return Cmd; +})(); + +var Dict = (function DictClosure() { + var nonSerializable = function nonSerializableClosure() { + return nonSerializable; // creating closure on some variable + }; + + var GETALL_DICTIONARY_TYPES_WHITELIST = { + 'Background': true, + 'ExtGState': true, + 'Halftone': true, + 'Layout': true, + 'Mask': true, + 'Pagination': true, + 'Printing': true + }; + + function isRecursionAllowedFor(dict) { + if (!isName(dict.Type)) { + return true; + } + var dictType = dict.Type.name; + return GETALL_DICTIONARY_TYPES_WHITELIST[dictType] === true; + } + + // xref is optional + function Dict(xref) { + // Map should only be used internally, use functions below to access. + this.map = Object.create(null); + this.xref = xref; + this.objId = null; + this.__nonSerializable__ = nonSerializable; // disable cloning of the Dict + } + + Dict.prototype = { + assignXref: function Dict_assignXref(newXref) { + this.xref = newXref; + }, + + // automatically dereferences Ref objects + get: function Dict_get(key1, key2, key3) { + var value; + var xref = this.xref; + if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || + typeof key2 === 'undefined') { + return xref ? xref.fetchIfRef(value) : value; + } + if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || + typeof key3 === 'undefined') { + return xref ? xref.fetchIfRef(value) : value; + } + value = this.map[key3] || null; + return xref ? xref.fetchIfRef(value) : value; + }, + + // Same as get(), but returns a promise and uses fetchIfRefAsync(). + getAsync: function Dict_getAsync(key1, key2, key3) { + var value; + var xref = this.xref; + if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || + typeof key2 === 'undefined') { + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + } + if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || + typeof key3 === 'undefined') { + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + } + value = this.map[key3] || null; + if (xref) { + return xref.fetchIfRefAsync(value); + } + return Promise.resolve(value); + }, + + // Same as get(), but dereferences all elements if the result is an Array. + getArray: function Dict_getArray(key1, key2, key3) { + var value = this.get(key1, key2, key3); + var xref = this.xref; + if (!isArray(value) || !xref) { + return value; + } + value = value.slice(); // Ensure that we don't modify the Dict data. + for (var i = 0, ii = value.length; i < ii; i++) { + if (!isRef(value[i])) { + continue; + } + value[i] = xref.fetch(value[i]); + } + return value; + }, + + // no dereferencing + getRaw: function Dict_getRaw(key) { + return this.map[key]; + }, + + // creates new map and dereferences all Refs + getAll: function Dict_getAll() { + var all = Object.create(null); + var queue = null; + var key, obj; + for (key in this.map) { + obj = this.get(key); + if (obj instanceof Dict) { + if (isRecursionAllowedFor(obj)) { + (queue || (queue = [])).push({target: all, key: key, obj: obj}); + } else { + all[key] = this.getRaw(key); + } + } else { + all[key] = obj; + } + } + if (!queue) { + return all; + } + + // trying to take cyclic references into the account + var processed = Object.create(null); + while (queue.length > 0) { + var item = queue.shift(); + var itemObj = item.obj; + var objId = itemObj.objId; + if (objId && objId in processed) { + item.target[item.key] = processed[objId]; + continue; + } + var dereferenced = Object.create(null); + for (key in itemObj.map) { + obj = itemObj.get(key); + if (obj instanceof Dict) { + if (isRecursionAllowedFor(obj)) { + queue.push({target: dereferenced, key: key, obj: obj}); + } else { + dereferenced[key] = itemObj.getRaw(key); + } + } else { + dereferenced[key] = obj; + } + } + if (objId) { + processed[objId] = dereferenced; + } + item.target[item.key] = dereferenced; + } + return all; + }, + + getKeys: function Dict_getKeys() { + return Object.keys(this.map); + }, + + set: function Dict_set(key, value) { + this.map[key] = value; + }, + + has: function Dict_has(key) { + return key in this.map; + }, + + forEach: function Dict_forEach(callback) { + for (var key in this.map) { + callback(key, this.get(key)); + } + } + }; + + Dict.empty = new Dict(null); + + Dict.merge = function Dict_merge(xref, dictArray) { + var mergedDict = new Dict(xref); + + for (var i = 0, ii = dictArray.length; i < ii; i++) { + var dict = dictArray[i]; + if (!isDict(dict)) { + continue; + } + for (var keyName in dict.map) { + if (mergedDict.map[keyName]) { + continue; + } + mergedDict.map[keyName] = dict.map[keyName]; + } + } + return mergedDict; + }; + + return Dict; +})(); + +var Ref = (function RefClosure() { + function Ref(num, gen) { + this.num = num; + this.gen = gen; + } + + Ref.prototype = { + toString: function Ref_toString() { + // This function is hot, so we make the string as compact as possible. + // |this.gen| is almost always zero, so we treat that case specially. + var str = this.num + 'R'; + if (this.gen !== 0) { + str += this.gen; + } + return str; + } + }; + + return Ref; +})(); + +// The reference is identified by number and generation. +// This structure stores only one instance of the reference. +var RefSet = (function RefSetClosure() { + function RefSet() { + this.dict = {}; + } + + RefSet.prototype = { + has: function RefSet_has(ref) { + return ref.toString() in this.dict; + }, + + put: function RefSet_put(ref) { + this.dict[ref.toString()] = true; + }, + + remove: function RefSet_remove(ref) { + delete this.dict[ref.toString()]; + } + }; + + return RefSet; +})(); + +var RefSetCache = (function RefSetCacheClosure() { + function RefSetCache() { + this.dict = Object.create(null); + } + + RefSetCache.prototype = { + get: function RefSetCache_get(ref) { + return this.dict[ref.toString()]; + }, + + has: function RefSetCache_has(ref) { + return ref.toString() in this.dict; + }, + + put: function RefSetCache_put(ref, obj) { + this.dict[ref.toString()] = obj; + }, + + putAlias: function RefSetCache_putAlias(ref, aliasRef) { + this.dict[ref.toString()] = this.get(aliasRef); + }, + + forEach: function RefSetCache_forEach(fn, thisArg) { + for (var i in this.dict) { + fn.call(thisArg, this.dict[i]); + } + }, + + clear: function RefSetCache_clear() { + this.dict = Object.create(null); + } + }; + + return RefSetCache; +})(); + +function isName(v) { + return v instanceof Name; +} + +function isCmd(v, cmd) { + return v instanceof Cmd && (cmd === undefined || v.cmd === cmd); +} + +function isDict(v, type) { + if (!(v instanceof Dict)) { + return false; + } + if (!type) { + return true; + } + var dictType = v.get('Type'); + return isName(dictType) && dictType.name === type; +} + +function isRef(v) { + return v instanceof Ref; +} + +function isStream(v) { + return typeof v === 'object' && v !== null && v.getBytes !== undefined; +} + +exports.Cmd = Cmd; +exports.Dict = Dict; +exports.Name = Name; +exports.Ref = Ref; +exports.RefSet = RefSet; +exports.RefSetCache = RefSetCache; +exports.isCmd = isCmd; +exports.isDict = isDict; +exports.isName = isName; +exports.isRef = isRef; +exports.isStream = isStream; +})); + + +(function (root, factory) { + { + factory((root.pdfjsDisplayAnnotationLayer = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayDOMUtils); + } +}(this, function (exports, sharedUtil, displayDOMUtils) { + +var AnnotationBorderStyleType = sharedUtil.AnnotationBorderStyleType; +var AnnotationType = sharedUtil.AnnotationType; +var Util = sharedUtil.Util; +var isExternalLinkTargetSet = sharedUtil.isExternalLinkTargetSet; +var LinkTargetStringMap = sharedUtil.LinkTargetStringMap; +var warn = sharedUtil.warn; +var CustomStyle = displayDOMUtils.CustomStyle; + +/** + * @typedef {Object} AnnotationElementParameters + * @property {Object} data + * @property {HTMLDivElement} layer + * @property {PDFPage} page + * @property {PageViewport} viewport + * @property {IPDFLinkService} linkService + */ + +/** + * @class + * @alias AnnotationElementFactory + */ +function AnnotationElementFactory() {} +AnnotationElementFactory.prototype = + /** @lends AnnotationElementFactory.prototype */ { + /** + * @param {AnnotationElementParameters} parameters + * @returns {AnnotationElement} + */ + create: function AnnotationElementFactory_create(parameters) { + var subtype = parameters.data.annotationType; + + switch (subtype) { + case AnnotationType.LINK: + return new LinkAnnotationElement(parameters); + + case AnnotationType.TEXT: + return new TextAnnotationElement(parameters); + + case AnnotationType.WIDGET: + return new WidgetAnnotationElement(parameters); + + case AnnotationType.POPUP: + return new PopupAnnotationElement(parameters); + + case AnnotationType.UNDERLINE: + return new UnderlineAnnotationElement(parameters); + + default: + throw new Error('Unimplemented annotation type "' + subtype + '"'); + } + } +}; + +/** + * @class + * @alias AnnotationElement + */ +var AnnotationElement = (function AnnotationElementClosure() { + function AnnotationElement(parameters) { + this.data = parameters.data; + this.layer = parameters.layer; + this.page = parameters.page; + this.viewport = parameters.viewport; + this.linkService = parameters.linkService; + + this.container = this._createContainer(); + } + + AnnotationElement.prototype = /** @lends AnnotationElement.prototype */ { + /** + * Create an empty container for the annotation's HTML element. + * + * @private + * @memberof AnnotationElement + * @returns {HTMLSectionElement} + */ + _createContainer: function AnnotationElement_createContainer() { + var data = this.data, page = this.page, viewport = this.viewport; + var container = document.createElement('section'); + var width = data.rect[2] - data.rect[0]; + var height = data.rect[3] - data.rect[1]; + + container.setAttribute('data-annotation-id', data.id); + + // Do *not* modify `data.rect`, since that will corrupt the annotation + // position on subsequent calls to `_createContainer` (see issue 6804). + var rect = Util.normalizeRect([ + data.rect[0], + page.view[3] - data.rect[1] + page.view[1], + data.rect[2], + page.view[3] - data.rect[3] + page.view[1] + ]); + + CustomStyle.setProp('transform', container, + 'matrix(' + viewport.transform.join(',') + ')'); + CustomStyle.setProp('transformOrigin', container, + -rect[0] + 'px ' + -rect[1] + 'px'); + + if (data.borderStyle.width > 0) { + container.style.borderWidth = data.borderStyle.width + 'px'; + if (data.borderStyle.style !== AnnotationBorderStyleType.UNDERLINE) { + // Underline styles only have a bottom border, so we do not need + // to adjust for all borders. This yields a similar result as + // Adobe Acrobat/Reader. + width = width - 2 * data.borderStyle.width; + height = height - 2 * data.borderStyle.width; + } + + var horizontalRadius = data.borderStyle.horizontalCornerRadius; + var verticalRadius = data.borderStyle.verticalCornerRadius; + if (horizontalRadius > 0 || verticalRadius > 0) { + var radius = horizontalRadius + 'px / ' + verticalRadius + 'px'; + CustomStyle.setProp('borderRadius', container, radius); + } + + switch (data.borderStyle.style) { + case AnnotationBorderStyleType.SOLID: + container.style.borderStyle = 'solid'; + break; + + case AnnotationBorderStyleType.DASHED: + container.style.borderStyle = 'dashed'; + break; + + case AnnotationBorderStyleType.BEVELED: + warn('Unimplemented border style: beveled'); + break; + + case AnnotationBorderStyleType.INSET: + warn('Unimplemented border style: inset'); + break; + + case AnnotationBorderStyleType.UNDERLINE: + container.style.borderBottomStyle = 'solid'; + break; + + default: + break; + } + + if (data.color) { + container.style.borderColor = + Util.makeCssRgb(data.color[0] | 0, + data.color[1] | 0, + data.color[2] | 0); + } else { + // Transparent (invisible) border, so do not draw it at all. + container.style.borderWidth = 0; + } + } + + container.style.left = rect[0] + 'px'; + container.style.top = rect[1] + 'px'; + + container.style.width = width + 'px'; + container.style.height = height + 'px'; + + return container; + }, + + /** + * Render the annotation's HTML element in the empty container. + * + * @public + * @memberof AnnotationElement + */ + render: function AnnotationElement_render() { + throw new Error('Abstract method AnnotationElement.render called'); + } + }; + + return AnnotationElement; +})(); + +/** + * @class + * @alias LinkAnnotationElement + */ +var LinkAnnotationElement = (function LinkAnnotationElementClosure() { + function LinkAnnotationElement(parameters) { + AnnotationElement.call(this, parameters); + } + + Util.inherit(LinkAnnotationElement, AnnotationElement, { + /** + * Render the link annotation's HTML element in the empty container. + * + * @public + * @memberof LinkAnnotationElement + * @returns {HTMLSectionElement} + */ + render: function LinkAnnotationElement_render() { + this.container.className = 'linkAnnotation'; + + var link = document.createElement('a'); + link.href = link.title = this.data.url || ''; + + if (this.data.url && isExternalLinkTargetSet()) { + link.target = LinkTargetStringMap[PDFJS.externalLinkTarget]; + } + + // Strip referrer from the URL. + if (this.data.url) { + link.rel = PDFJS.externalLinkRel; + } + + if (!this.data.url) { + if (this.data.action) { + this._bindNamedAction(link, this.data.action); + } else { + this._bindLink(link, ('dest' in this.data) ? this.data.dest : null); + } + } + + this.container.appendChild(link); + return this.container; + }, + + /** + * Bind internal links to the link element. + * + * @private + * @param {Object} link + * @param {Object} destination + * @memberof LinkAnnotationElement + */ + _bindLink: function LinkAnnotationElement_bindLink(link, destination) { + var self = this; + + link.href = this.linkService.getDestinationHash(destination); + link.onclick = function() { + if (destination) { + self.linkService.navigateTo(destination); + } + return false; + }; + if (destination) { + link.className = 'internalLink'; + } + }, + + /** + * Bind named actions to the link element. + * + * @private + * @param {Object} link + * @param {Object} action + * @memberof LinkAnnotationElement + */ + _bindNamedAction: + function LinkAnnotationElement_bindNamedAction(link, action) { + var self = this; + + link.href = this.linkService.getAnchorUrl(''); + link.onclick = function() { + self.linkService.executeNamedAction(action); + return false; + }; + link.className = 'internalLink'; + } + }); + + return LinkAnnotationElement; +})(); + +/** + * @class + * @alias TextAnnotationElement + */ +var TextAnnotationElement = (function TextAnnotationElementClosure() { + function TextAnnotationElement(parameters) { + AnnotationElement.call(this, parameters); + } + + Util.inherit(TextAnnotationElement, AnnotationElement, { + /** + * Render the text annotation's HTML element in the empty container. + * + * @public + * @memberof TextAnnotationElement + * @returns {HTMLSectionElement} + */ + render: function TextAnnotationElement_render() { + this.container.className = 'textAnnotation'; + + var image = document.createElement('img'); + image.style.height = this.container.style.height; + image.style.width = this.container.style.width; + image.src = PDFJS.imageResourcesPath + 'annotation-' + + this.data.name.toLowerCase() + '.svg'; + image.alt = '[{{type}} Annotation]'; + image.dataset.l10nId = 'text_annotation_type'; + image.dataset.l10nArgs = JSON.stringify({type: this.data.name}); + + if (!this.data.hasPopup) { + var popupElement = new PopupElement({ + container: this.container, + trigger: image, + color: this.data.color, + title: this.data.title, + contents: this.data.contents, + hideWrapper: true + }); + var popup = popupElement.render(); + + // Position the popup next to the Text annotation's container. + popup.style.left = image.style.width; + + this.container.appendChild(popup); + } + + this.container.appendChild(image); + return this.container; + } + }); + + return TextAnnotationElement; +})(); + +/** + * @class + * @alias WidgetAnnotationElement + */ +var WidgetAnnotationElement = (function WidgetAnnotationElementClosure() { + function WidgetAnnotationElement(parameters) { + AnnotationElement.call(this, parameters); + } + + Util.inherit(WidgetAnnotationElement, AnnotationElement, { + /** + * Render the widget annotation's HTML element in the empty container. + * + * @public + * @memberof WidgetAnnotationElement + * @returns {HTMLSectionElement} + */ + render: function WidgetAnnotationElement_render() { + var content = document.createElement('div'); + content.textContent = this.data.fieldValue; + var textAlignment = this.data.textAlignment; + content.style.textAlign = ['left', 'center', 'right'][textAlignment]; + content.style.verticalAlign = 'middle'; + content.style.display = 'table-cell'; + + var font = (this.data.fontRefName ? + this.page.commonObjs.getData(this.data.fontRefName) : null); + this._setTextStyle(content, font); + + this.container.appendChild(content); + return this.container; + }, + + /** + * Apply text styles to the text in the element. + * + * @private + * @param {HTMLDivElement} element + * @param {Object} font + * @memberof WidgetAnnotationElement + */ + _setTextStyle: + function WidgetAnnotationElement_setTextStyle(element, font) { + // TODO: This duplicates some of the logic in CanvasGraphics.setFont(). + var style = element.style; + style.fontSize = this.data.fontSize + 'px'; + style.direction = (this.data.fontDirection < 0 ? 'rtl': 'ltr'); + + if (!font) { + return; + } + + style.fontWeight = (font.black ? + (font.bold ? '900' : 'bold') : + (font.bold ? 'bold' : 'normal')); + style.fontStyle = (font.italic ? 'italic' : 'normal'); + + // Use a reasonable default font if the font doesn't specify a fallback. + var fontFamily = font.loadedName ? '"' + font.loadedName + '", ' : ''; + var fallbackName = font.fallbackName || 'Helvetica, sans-serif'; + style.fontFamily = fontFamily + fallbackName; + } + }); + + return WidgetAnnotationElement; +})(); + +/** + * @class + * @alias PopupAnnotationElement + */ +var PopupAnnotationElement = (function PopupAnnotationElementClosure() { + function PopupAnnotationElement(parameters) { + AnnotationElement.call(this, parameters); + } + + Util.inherit(PopupAnnotationElement, AnnotationElement, { + /** + * Render the popup annotation's HTML element in the empty container. + * + * @public + * @memberof PopupAnnotationElement + * @returns {HTMLSectionElement} + */ + render: function PopupAnnotationElement_render() { + this.container.className = 'popupAnnotation'; + + var selector = '[data-annotation-id="' + this.data.parentId + '"]'; + var parentElement = this.layer.querySelector(selector); + if (!parentElement) { + return this.container; + } + + var popup = new PopupElement({ + container: this.container, + trigger: parentElement, + color: this.data.color, + title: this.data.title, + contents: this.data.contents + }); + + // Position the popup next to the parent annotation's container. + // PDF viewers ignore a popup annotation's rectangle. + var parentLeft = parseFloat(parentElement.style.left); + var parentWidth = parseFloat(parentElement.style.width); + CustomStyle.setProp('transformOrigin', this.container, + -(parentLeft + parentWidth) + 'px -' + + parentElement.style.top); + this.container.style.left = (parentLeft + parentWidth) + 'px'; + + this.container.appendChild(popup.render()); + return this.container; + } + }); + + return PopupAnnotationElement; +})(); + +/** + * @class + * @alias PopupElement + */ +var PopupElement = (function PopupElementClosure() { + var BACKGROUND_ENLIGHT = 0.7; + + function PopupElement(parameters) { + this.container = parameters.container; + this.trigger = parameters.trigger; + this.color = parameters.color; + this.title = parameters.title; + this.contents = parameters.contents; + this.hideWrapper = parameters.hideWrapper || false; + + this.pinned = false; + } + + PopupElement.prototype = /** @lends PopupElement.prototype */ { + /** + * Render the popup's HTML element. + * + * @public + * @memberof PopupElement + * @returns {HTMLSectionElement} + */ + render: function PopupElement_render() { + var wrapper = document.createElement('div'); + wrapper.className = 'popupWrapper'; + + // For Popup annotations we hide the entire section because it contains + // only the popup. However, for Text annotations without a separate Popup + // annotation, we cannot hide the entire container as the image would + // disappear too. In that special case, hiding the wrapper suffices. + this.hideElement = (this.hideWrapper ? wrapper : this.container); + this.hideElement.setAttribute('hidden', true); + + var popup = document.createElement('div'); + popup.className = 'popup'; + + var color = this.color; + if (color) { + // Enlighten the color. + var r = BACKGROUND_ENLIGHT * (255 - color[0]) + color[0]; + var g = BACKGROUND_ENLIGHT * (255 - color[1]) + color[1]; + var b = BACKGROUND_ENLIGHT * (255 - color[2]) + color[2]; + popup.style.backgroundColor = Util.makeCssRgb(r | 0, g | 0, b | 0); + } + + var contents = this._formatContents(this.contents); + var title = document.createElement('h1'); + title.textContent = this.title; + + // Attach the event listeners to the trigger element. + this.trigger.addEventListener('click', this._toggle.bind(this)); + this.trigger.addEventListener('mouseover', this._show.bind(this, false)); + this.trigger.addEventListener('mouseout', this._hide.bind(this, false)); + popup.addEventListener('click', this._hide.bind(this, true)); + + popup.appendChild(title); + popup.appendChild(contents); + wrapper.appendChild(popup); + return wrapper; + }, + + /** + * Format the contents of the popup by adding newlines where necessary. + * + * @private + * @param {string} contents + * @memberof PopupElement + * @returns {HTMLParagraphElement} + */ + _formatContents: function PopupElement_formatContents(contents) { + var p = document.createElement('p'); + var lines = contents.split(/(?:\r\n?|\n)/); + for (var i = 0, ii = lines.length; i < ii; ++i) { + var line = lines[i]; + p.appendChild(document.createTextNode(line)); + if (i < (ii - 1)) { + p.appendChild(document.createElement('br')); + } + } + return p; + }, + + /** + * Toggle the visibility of the popup. + * + * @private + * @memberof PopupElement + */ + _toggle: function PopupElement_toggle() { + if (this.pinned) { + this._hide(true); + } else { + this._show(true); + } + }, + + /** + * Show the popup. + * + * @private + * @param {boolean} pin + * @memberof PopupElement + */ + _show: function PopupElement_show(pin) { + if (pin) { + this.pinned = true; + } + if (this.hideElement.hasAttribute('hidden')) { + this.hideElement.removeAttribute('hidden'); + this.container.style.zIndex += 1; + } + }, + + /** + * Hide the popup. + * + * @private + * @param {boolean} unpin + * @memberof PopupElement + */ + _hide: function PopupElement_hide(unpin) { + if (unpin) { + this.pinned = false; + } + if (!this.hideElement.hasAttribute('hidden') && !this.pinned) { + this.hideElement.setAttribute('hidden', true); + this.container.style.zIndex -= 1; + } + } + }; + + return PopupElement; +})(); + +/** + * @class + * @alias UnderlineAnnotationElement + */ +var UnderlineAnnotationElement = ( + function UnderlineAnnotationElementClosure() { + function UnderlineAnnotationElement(parameters) { + AnnotationElement.call(this, parameters); + } + + Util.inherit(UnderlineAnnotationElement, AnnotationElement, { + /** + * Render the underline annotation's HTML element in the empty container. + * + * @public + * @memberof UnderlineAnnotationElement + * @returns {HTMLSectionElement} + */ + render: function UnderlineAnnotationElement_render() { + this.container.className = 'underlineAnnotation'; + return this.container; + } + }); + + return UnderlineAnnotationElement; +})(); + +/** + * @typedef {Object} AnnotationLayerParameters + * @property {PageViewport} viewport + * @property {HTMLDivElement} div + * @property {Array} annotations + * @property {PDFPage} page + * @property {IPDFLinkService} linkService + */ + +/** + * @class + * @alias AnnotationLayer + */ +var AnnotationLayer = (function AnnotationLayerClosure() { + return { + /** + * Render a new annotation layer with all annotation elements. + * + * @public + * @param {AnnotationLayerParameters} parameters + * @memberof AnnotationLayer + */ + render: function AnnotationLayer_render(parameters) { + var annotationElementFactory = new AnnotationElementFactory(); + + for (var i = 0, ii = parameters.annotations.length; i < ii; i++) { + var data = parameters.annotations[i]; + if (!data || !data.hasHtml) { + continue; + } + + var properties = { + data: data, + layer: parameters.div, + page: parameters.page, + viewport: parameters.viewport, + linkService: parameters.linkService + }; + var element = annotationElementFactory.create(properties); + parameters.div.appendChild(element.render()); + } + }, + + /** + * Update the annotation elements on existing annotation layer. + * + * @public + * @param {AnnotationLayerParameters} parameters + * @memberof AnnotationLayer + */ + update: function AnnotationLayer_update(parameters) { + for (var i = 0, ii = parameters.annotations.length; i < ii; i++) { + var data = parameters.annotations[i]; + var element = parameters.div.querySelector( + '[data-annotation-id="' + data.id + '"]'); + if (element) { + CustomStyle.setProp('transform', element, + 'matrix(' + parameters.viewport.transform.join(',') + ')'); + } + } + parameters.div.removeAttribute('hidden'); + } + }; +})(); + +PDFJS.AnnotationLayer = AnnotationLayer; + +exports.AnnotationLayer = AnnotationLayer; +})); + + +(function (root, factory) { + { + factory((root.pdfjsDisplayFontLoader = {}), root.pdfjsSharedUtil, + root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedUtil, sharedGlobal) { + +var assert = sharedUtil.assert; +var bytesToString = sharedUtil.bytesToString; +var string32 = sharedUtil.string32; +var shadow = sharedUtil.shadow; +var warn = sharedUtil.warn; + +var PDFJS = sharedGlobal.PDFJS; +var globalScope = sharedGlobal.globalScope; +var isWorker = sharedGlobal.isWorker; + +function FontLoader(docId) { + this.docId = docId; + this.styleElement = null; + this.nativeFontFaces = []; + this.loadTestFontId = 0; + this.loadingContext = { + requests: [], + nextRequestId: 0 + }; +} +FontLoader.prototype = { + insertRule: function fontLoaderInsertRule(rule) { + var styleElement = this.styleElement; + if (!styleElement) { + styleElement = this.styleElement = document.createElement('style'); + styleElement.id = 'PDFJS_FONT_STYLE_TAG_' + this.docId; + document.documentElement.getElementsByTagName('head')[0].appendChild( + styleElement); + } + + var styleSheet = styleElement.sheet; + styleSheet.insertRule(rule, styleSheet.cssRules.length); + }, + + clear: function fontLoaderClear() { + var styleElement = this.styleElement; + if (styleElement) { + styleElement.parentNode.removeChild(styleElement); + styleElement = this.styleElement = null; + } + this.nativeFontFaces.forEach(function(nativeFontFace) { + document.fonts.delete(nativeFontFace); + }); + this.nativeFontFaces.length = 0; + }, + get loadTestFont() { + // This is a CFF font with 1 glyph for '.' that fills its entire width and + // height. + return shadow(this, 'loadTestFont', atob( + 'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' + + 'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' + + 'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' + + 'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' + + 'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' + + 'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' + + 'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' + + 'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' + + 'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' + + 'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' + + 'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' + + 'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' + + 'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' + + 'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' + + 'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' + + 'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' + + 'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' + + 'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' + + 'ABAAAAAAAAAAAD6AAAAAAAAA==' + )); + }, + + addNativeFontFace: function fontLoader_addNativeFontFace(nativeFontFace) { + this.nativeFontFaces.push(nativeFontFace); + document.fonts.add(nativeFontFace); + }, + + bind: function fontLoaderBind(fonts, callback) { + assert(!isWorker, 'bind() shall be called from main thread'); + + var rules = []; + var fontsToLoad = []; + var fontLoadPromises = []; + var getNativeFontPromise = function(nativeFontFace) { + // Return a promise that is always fulfilled, even when the font fails to + // load. + return nativeFontFace.loaded.catch(function(e) { + warn('Failed to load font "' + nativeFontFace.family + '": ' + e); + }); + }; + for (var i = 0, ii = fonts.length; i < ii; i++) { + var font = fonts[i]; + + // Add the font to the DOM only once or skip if the font + // is already loaded. + if (font.attached || font.loading === false) { + continue; + } + font.attached = true; + + if (FontLoader.isFontLoadingAPISupported) { + var nativeFontFace = font.createNativeFontFace(); + if (nativeFontFace) { + this.addNativeFontFace(nativeFontFace); + fontLoadPromises.push(getNativeFontPromise(nativeFontFace)); + } + } else { + var rule = font.createFontFaceRule(); + if (rule) { + this.insertRule(rule); + rules.push(rule); + fontsToLoad.push(font); + } + } + } + + var request = this.queueLoadingCallback(callback); + if (FontLoader.isFontLoadingAPISupported) { + Promise.all(fontLoadPromises).then(function() { + request.complete(); + }); + } else if (rules.length > 0 && !FontLoader.isSyncFontLoadingSupported) { + this.prepareFontLoadEvent(rules, fontsToLoad, request); + } else { + request.complete(); + } + }, + + queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) { + function LoadLoader_completeRequest() { + assert(!request.end, 'completeRequest() cannot be called twice'); + request.end = Date.now(); + + // sending all completed requests in order how they were queued + while (context.requests.length > 0 && context.requests[0].end) { + var otherRequest = context.requests.shift(); + setTimeout(otherRequest.callback, 0); + } + } + + var context = this.loadingContext; + var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++); + var request = { + id: requestId, + complete: LoadLoader_completeRequest, + callback: callback, + started: Date.now() + }; + context.requests.push(request); + return request; + }, + + prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules, + fonts, + request) { + /** Hack begin */ + // There's currently no event when a font has finished downloading so the + // following code is a dirty hack to 'guess' when a font is + // ready. It's assumed fonts are loaded in order, so add a known test + // font after the desired fonts and then test for the loading of that + // test font. + + function int32(data, offset) { + return (data.charCodeAt(offset) << 24) | + (data.charCodeAt(offset + 1) << 16) | + (data.charCodeAt(offset + 2) << 8) | + (data.charCodeAt(offset + 3) & 0xff); + } + + function spliceString(s, offset, remove, insert) { + var chunk1 = s.substr(0, offset); + var chunk2 = s.substr(offset + remove); + return chunk1 + insert + chunk2; + } + + var i, ii; + + var canvas = document.createElement('canvas'); + canvas.width = 1; + canvas.height = 1; + var ctx = canvas.getContext('2d'); + + var called = 0; + function isFontReady(name, callback) { + called++; + // With setTimeout clamping this gives the font ~100ms to load. + if(called > 30) { + warn('Load test font never loaded.'); + callback(); + return; + } + ctx.font = '30px ' + name; + ctx.fillText('.', 0, 20); + var imageData = ctx.getImageData(0, 0, 1, 1); + if (imageData.data[3] > 0) { + callback(); + return; + } + setTimeout(isFontReady.bind(null, name, callback)); + } + + var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++; + // Chromium seems to cache fonts based on a hash of the actual font data, + // so the font must be modified for each load test else it will appear to + // be loaded already. + // TODO: This could maybe be made faster by avoiding the btoa of the full + // font by splitting it in chunks before hand and padding the font id. + var data = this.loadTestFont; + var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum) + data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length, + loadTestFontId); + // CFF checksum is important for IE, adjusting it + var CFF_CHECKSUM_OFFSET = 16; + var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X' + var checksum = int32(data, CFF_CHECKSUM_OFFSET); + for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) { + checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0; + } + if (i < loadTestFontId.length) { // align to 4 bytes boundary + checksum = (checksum - XXXX_VALUE + + int32(loadTestFontId + 'XXX', i)) | 0; + } + data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum)); + + var url = 'url(data:font/opentype;base64,' + btoa(data) + ');'; + var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' + + url + '}'; + this.insertRule(rule); + + var names = []; + for (i = 0, ii = fonts.length; i < ii; i++) { + names.push(fonts[i].loadedName); + } + names.push(loadTestFontId); + + var div = document.createElement('div'); + div.setAttribute('style', + 'visibility: hidden;' + + 'width: 10px; height: 10px;' + + 'position: absolute; top: 0px; left: 0px;'); + for (i = 0, ii = names.length; i < ii; ++i) { + var span = document.createElement('span'); + span.textContent = 'Hi'; + span.style.fontFamily = names[i]; + div.appendChild(span); + } + document.body.appendChild(div); + + isFontReady(loadTestFontId, function() { + document.body.removeChild(div); + request.complete(); + }); + /** Hack end */ } }; +FontLoader.isFontLoadingAPISupported = (!isWorker && + typeof document !== 'undefined' && !!document.fonts); +Object.defineProperty(FontLoader, 'isSyncFontLoadingSupported', { + get: function () { + var supported = false; -exports.Metrics = Metrics; + // User agent string sniffing is bad, but there is no reliable way to tell + // if font is fully loaded and ready to be used with canvas. + var userAgent = window.navigator.userAgent; + var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent); + if (m && m[1] >= 14) { + supported = true; + } + // TODO other browsers + if (userAgent === 'node') { + supported = true; + } + return shadow(FontLoader, 'isSyncFontLoadingSupported', supported); + }, + enumerable: true, + configurable: true +}); + +var FontFaceObject = (function FontFaceObjectClosure() { + function FontFaceObject(translatedData) { + this.compiledGlyphs = {}; + // importing translated data + for (var i in translatedData) { + this[i] = translatedData[i]; + } + } + Object.defineProperty(FontFaceObject, 'isEvalSupported', { + get: function () { + var evalSupport = false; + if (PDFJS.isEvalSupported) { + try { + /* jshint evil: true */ + new Function(''); + evalSupport = true; + } catch (e) {} + } + return shadow(this, 'isEvalSupported', evalSupport); + }, + enumerable: true, + configurable: true + }); + FontFaceObject.prototype = { + createNativeFontFace: function FontFaceObject_createNativeFontFace() { + if (!this.data) { + return null; + } + + if (PDFJS.disableFontFace) { + this.disableFontFace = true; + return null; + } + + var nativeFontFace = new FontFace(this.loadedName, this.data, {}); + + if (PDFJS.pdfBug && 'FontInspector' in globalScope && + globalScope['FontInspector'].enabled) { + globalScope['FontInspector'].fontAdded(this); + } + return nativeFontFace; + }, + + createFontFaceRule: function FontFaceObject_createFontFaceRule() { + if (!this.data) { + return null; + } + + if (PDFJS.disableFontFace) { + this.disableFontFace = true; + return null; + } + + var data = bytesToString(new Uint8Array(this.data)); + var fontName = this.loadedName; + + // Add the font-face rule to the document + var url = ('url(data:' + this.mimetype + ';base64,' + + window.btoa(data) + ');'); + var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}'; + + if (PDFJS.pdfBug && 'FontInspector' in globalScope && + globalScope['FontInspector'].enabled) { + globalScope['FontInspector'].fontAdded(this, url); + } + + return rule; + }, + + getPathGenerator: + function FontFaceObject_getPathGenerator(objs, character) { + if (!(character in this.compiledGlyphs)) { + var cmds = objs.get(this.loadedName + '_path_' + character); + var current, i, len; + + // If we can, compile cmds into JS for MAXIMUM SPEED + if (FontFaceObject.isEvalSupported) { + var args, js = ''; + for (i = 0, len = cmds.length; i < len; i++) { + current = cmds[i]; + + if (current.args !== undefined) { + args = current.args.join(','); + } else { + args = ''; + } + + js += 'c.' + current.cmd + '(' + args + ');\n'; + } + /* jshint -W054 */ + this.compiledGlyphs[character] = new Function('c', 'size', js); + } else { + // But fall back on using Function.prototype.apply() if we're + // blocked from using eval() for whatever reason (like CSP policies) + this.compiledGlyphs[character] = function(c, size) { + for (i = 0, len = cmds.length; i < len; i++) { + current = cmds[i]; + + if (current.cmd === 'scale') { + current.args = [size, -size]; + } + + c[current.cmd].apply(c, current.args); + } + }; + } + } + return this.compiledGlyphs[character]; + } + }; + return FontFaceObject; +})(); + +exports.FontFaceObject = FontFaceObject; +exports.FontLoader = FontLoader; +})); + + +(function (root, factory) { + { + factory((root.pdfjsDisplayMetadata = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { + +var error = sharedUtil.error; + +var Metadata = PDFJS.Metadata = (function MetadataClosure() { + function fixMetadata(meta) { + return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) { + var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g, + function(code, d1, d2, d3) { + return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1); + }); + var chars = ''; + for (var i = 0; i < bytes.length; i += 2) { + var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1); + chars += code >= 32 && code < 127 && code !== 60 && code !== 62 && + code !== 38 && false ? String.fromCharCode(code) : + '&#x' + (0x10000 + code).toString(16).substring(1) + ';'; + } + return '>' + chars; + }); + } + + function Metadata(meta) { + if (typeof meta === 'string') { + // Ghostscript produces invalid metadata + meta = fixMetadata(meta); + + var parser = new DOMParser(); + meta = parser.parseFromString(meta, 'application/xml'); + } else if (!(meta instanceof Document)) { + error('Metadata: Invalid metadata object'); + } + + this.metaDocument = meta; + this.metadata = {}; + this.parse(); + } + + Metadata.prototype = { + parse: function Metadata_parse() { + var doc = this.metaDocument; + var rdf = doc.documentElement; + + if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in + rdf = rdf.firstChild; + while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf') { + rdf = rdf.nextSibling; + } + } + + var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null; + if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes()) { + return; + } + + var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength; + for (i = 0, length = children.length; i < length; i++) { + desc = children[i]; + if (desc.nodeName.toLowerCase() !== 'rdf:description') { + continue; + } + + for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) { + if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') { + entry = desc.childNodes[ii]; + name = entry.nodeName.toLowerCase(); + this.metadata[name] = entry.textContent.trim(); + } + } + } + }, + + get: function Metadata_get(name) { + return this.metadata[name] || null; + }, + + has: function Metadata_has(name) { + return typeof this.metadata[name] !== 'undefined'; + } + }; + + return Metadata; +})(); + +exports.Metadata = Metadata; })); -(function (root, factory) { - { - factory((root.pdfjsCoreBidi = {}), root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedGlobal) { +(function (root, factory) { + { + factory((root.pdfjsDisplaySVG = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { + +var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; +var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; +var ImageKind = sharedUtil.ImageKind; +var OPS = sharedUtil.OPS; +var Util = sharedUtil.Util; +var isNum = sharedUtil.isNum; +var isArray = sharedUtil.isArray; +var warn = sharedUtil.warn; + +var SVG_DEFAULTS = { + fontStyle: 'normal', + fontWeight: 'normal', + fillColor: '#000000' +}; + +var convertImgDataToPng = (function convertImgDataToPngClosure() { + var PNG_HEADER = + new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]); + + var CHUNK_WRAPPER_SIZE = 12; + + var crcTable = new Int32Array(256); + for (var i = 0; i < 256; i++) { + var c = i; + for (var h = 0; h < 8; h++) { + if (c & 1) { + c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff); + } else { + c = (c >> 1) & 0x7fffffff; + } + } + crcTable[i] = c; + } + + function crc32(data, start, end) { + var crc = -1; + for (var i = start; i < end; i++) { + var a = (crc ^ data[i]) & 0xff; + var b = crcTable[a]; + crc = (crc >>> 8) ^ b; + } + return crc ^ -1; + } + + function writePngChunk(type, body, data, offset) { + var p = offset; + var len = body.length; + + data[p] = len >> 24 & 0xff; + data[p + 1] = len >> 16 & 0xff; + data[p + 2] = len >> 8 & 0xff; + data[p + 3] = len & 0xff; + p += 4; + + data[p] = type.charCodeAt(0) & 0xff; + data[p + 1] = type.charCodeAt(1) & 0xff; + data[p + 2] = type.charCodeAt(2) & 0xff; + data[p + 3] = type.charCodeAt(3) & 0xff; + p += 4; + + data.set(body, p); + p += body.length; + + var crc = crc32(data, offset + 4, p); + + data[p] = crc >> 24 & 0xff; + data[p + 1] = crc >> 16 & 0xff; + data[p + 2] = crc >> 8 & 0xff; + data[p + 3] = crc & 0xff; + } + + function adler32(data, start, end) { + var a = 1; + var b = 0; + for (var i = start; i < end; ++i) { + a = (a + (data[i] & 0xff)) % 65521; + b = (b + a) % 65521; + } + return (b << 16) | a; + } + + function encode(imgData, kind) { + var width = imgData.width; + var height = imgData.height; + var bitDepth, colorType, lineSize; + var bytes = imgData.data; + + switch (kind) { + case ImageKind.GRAYSCALE_1BPP: + colorType = 0; + bitDepth = 1; + lineSize = (width + 7) >> 3; + break; + case ImageKind.RGB_24BPP: + colorType = 2; + bitDepth = 8; + lineSize = width * 3; + break; + case ImageKind.RGBA_32BPP: + colorType = 6; + bitDepth = 8; + lineSize = width * 4; + break; + default: + throw new Error('invalid format'); + } + + // prefix every row with predictor 0 + var literals = new Uint8Array((1 + lineSize) * height); + var offsetLiterals = 0, offsetBytes = 0; + var y, i; + for (y = 0; y < height; ++y) { + literals[offsetLiterals++] = 0; // no prediction + literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize), + offsetLiterals); + offsetBytes += lineSize; + offsetLiterals += lineSize; + } + + if (kind === ImageKind.GRAYSCALE_1BPP) { + // inverting for B/W + offsetLiterals = 0; + for (y = 0; y < height; y++) { + offsetLiterals++; // skipping predictor + for (i = 0; i < lineSize; i++) { + literals[offsetLiterals++] ^= 0xFF; + } + } + } + + var ihdr = new Uint8Array([ + width >> 24 & 0xff, + width >> 16 & 0xff, + width >> 8 & 0xff, + width & 0xff, + height >> 24 & 0xff, + height >> 16 & 0xff, + height >> 8 & 0xff, + height & 0xff, + bitDepth, // bit depth + colorType, // color type + 0x00, // compression method + 0x00, // filter method + 0x00 // interlace method + ]); + + var len = literals.length; + var maxBlockLength = 0xFFFF; + + var deflateBlocks = Math.ceil(len / maxBlockLength); + var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4); + var pi = 0; + idat[pi++] = 0x78; // compression method and flags + idat[pi++] = 0x9c; // flags + + var pos = 0; + while (len > maxBlockLength) { + // writing non-final DEFLATE blocks type 0 and length of 65535 + idat[pi++] = 0x00; + idat[pi++] = 0xff; + idat[pi++] = 0xff; + idat[pi++] = 0x00; + idat[pi++] = 0x00; + idat.set(literals.subarray(pos, pos + maxBlockLength), pi); + pi += maxBlockLength; + pos += maxBlockLength; + len -= maxBlockLength; + } -var PDFJS = sharedGlobal.PDFJS; + // writing non-final DEFLATE blocks type 0 + idat[pi++] = 0x01; + idat[pi++] = len & 0xff; + idat[pi++] = len >> 8 & 0xff; + idat[pi++] = (~len & 0xffff) & 0xff; + idat[pi++] = (~len & 0xffff) >> 8 & 0xff; + idat.set(literals.subarray(pos), pi); + pi += literals.length - pos; -var bidi = PDFJS.bidi = (function bidiClosure() { - // Character types for symbols from 0000 to 00FF. - var baseTypes = [ - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'S', 'B', 'S', 'WS', - 'B', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'BN', 'B', 'B', 'B', 'S', 'WS', 'ON', 'ON', 'ET', 'ET', 'ET', 'ON', - 'ON', 'ON', 'ON', 'ON', 'ON', 'CS', 'ON', 'CS', 'ON', 'EN', 'EN', 'EN', - 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'ON', 'ON', 'ON', 'ON', 'ON', - 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'ON', 'ON', - 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'ON', 'ON', 'ON', 'ON', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'B', 'BN', - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'CS', 'ON', 'ET', 'ET', 'ET', 'ET', 'ON', 'ON', 'ON', 'ON', 'L', 'ON', - 'ON', 'ON', 'ON', 'ON', 'ET', 'ET', 'EN', 'EN', 'ON', 'L', 'ON', 'ON', 'ON', - 'EN', 'L', 'ON', 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L' - ]; + var adler = adler32(literals, 0, literals.length); // checksum + idat[pi++] = adler >> 24 & 0xff; + idat[pi++] = adler >> 16 & 0xff; + idat[pi++] = adler >> 8 & 0xff; + idat[pi++] = adler & 0xff; - // Character types for symbols from 0600 to 06FF - var arabicTypes = [ - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'CS', 'AL', 'ON', 'ON', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', - 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', - 'AN', 'ET', 'AN', 'AN', 'AL', 'AL', 'AL', 'NSM', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', - 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'ON', 'NSM', - 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL' - ]; + // PNG will consists: header, IHDR+data, IDAT+data, and IEND. + var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) + + ihdr.length + idat.length; + var data = new Uint8Array(pngLength); + var offset = 0; + data.set(PNG_HEADER, offset); + offset += PNG_HEADER.length; + writePngChunk('IHDR', ihdr, data, offset); + offset += CHUNK_WRAPPER_SIZE + ihdr.length; + writePngChunk('IDATA', idat, data, offset); + offset += CHUNK_WRAPPER_SIZE + idat.length; + writePngChunk('IEND', new Uint8Array(0), data, offset); - function isOdd(i) { - return (i & 1) !== 0; + return PDFJS.createObjectURL(data, 'image/png'); } - function isEven(i) { - return (i & 1) === 0; - } + return function convertImgDataToPng(imgData) { + var kind = (imgData.kind === undefined ? + ImageKind.GRAYSCALE_1BPP : imgData.kind); + return encode(imgData, kind); + }; +})(); - function findUnequal(arr, start, value) { - for (var j = start, jj = arr.length; j < jj; ++j) { - if (arr[j] !== value) { - return j; - } - } - return j; - } +var SVGExtraState = (function SVGExtraStateClosure() { + function SVGExtraState() { + this.fontSizeScale = 1; + this.fontWeight = SVG_DEFAULTS.fontWeight; + this.fontSize = 0; - function setValues(arr, start, end, value) { - for (var j = start; j < end; ++j) { - arr[j] = value; - } - } + this.textMatrix = IDENTITY_MATRIX; + this.fontMatrix = FONT_IDENTITY_MATRIX; + this.leading = 0; - function reverseValues(arr, start, end) { - for (var i = start, j = end - 1; i < j; ++i, --j) { - var temp = arr[i]; - arr[i] = arr[j]; - arr[j] = temp; - } - } + // Current point (in user coordinates) + this.x = 0; + this.y = 0; - function createBidiText(str, isLTR, vertical) { - return { - str: str, - dir: (vertical ? 'ttb' : (isLTR ? 'ltr' : 'rtl')) - }; - } + // Start of text line (in text coordinates) + this.lineX = 0; + this.lineY = 0; - // These are used in bidi(), which is called frequently. We re-use them on - // each call to avoid unnecessary allocations. - var chars = []; - var types = []; + // Character and word spacing + this.charSpacing = 0; + this.wordSpacing = 0; + this.textHScale = 1; + this.textRise = 0; - function bidi(str, startLevel, vertical) { - var isLTR = true; - var strLength = str.length; - if (strLength === 0 || vertical) { - return createBidiText(str, isLTR, vertical); - } + // Default foreground and background colors + this.fillColor = SVG_DEFAULTS.fillColor; + this.strokeColor = '#000000'; - // Get types and fill arrays - chars.length = strLength; - types.length = strLength; - var numBidi = 0; + this.fillAlpha = 1; + this.strokeAlpha = 1; + this.lineWidth = 1; + this.lineJoin = ''; + this.lineCap = ''; + this.miterLimit = 0; - var i, ii; - for (i = 0; i < strLength; ++i) { - chars[i] = str.charAt(i); + this.dashArray = []; + this.dashPhase = 0; - var charCode = str.charCodeAt(i); - var charType = 'L'; - if (charCode <= 0x00ff) { - charType = baseTypes[charCode]; - } else if (0x0590 <= charCode && charCode <= 0x05f4) { - charType = 'R'; - } else if (0x0600 <= charCode && charCode <= 0x06ff) { - charType = arabicTypes[charCode & 0xff]; - } else if (0x0700 <= charCode && charCode <= 0x08AC) { - charType = 'AL'; - } - if (charType === 'R' || charType === 'AL' || charType === 'AN') { - numBidi++; - } - types[i] = charType; - } + this.dependencies = []; - // Detect the bidi method - // - If there are no rtl characters then no bidi needed - // - If less than 30% chars are rtl then string is primarily ltr - // - If more than 30% chars are rtl then string is primarily rtl - if (numBidi === 0) { - isLTR = true; - return createBidiText(str, isLTR); - } + // Clipping + this.clipId = ''; + this.pendingClip = false; - if (startLevel === -1) { - if ((strLength / numBidi) < 0.3) { - isLTR = true; - startLevel = 0; - } else { - isLTR = false; - startLevel = 1; - } - } + this.maskId = ''; + } - var levels = []; - for (i = 0; i < strLength; ++i) { - levels[i] = startLevel; + SVGExtraState.prototype = { + clone: function SVGExtraState_clone() { + return Object.create(this); + }, + setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) { + this.x = x; + this.y = y; } + }; + return SVGExtraState; +})(); - /* - X1-X10: skip most of this, since we are NOT doing the embeddings. - */ - var e = (isOdd(startLevel) ? 'R' : 'L'); - var sor = e; - var eor = sor; +var SVGGraphics = (function SVGGraphicsClosure() { + function createScratchSVG(width, height) { + var NS = 'http://www.w3.org/2000/svg'; + var svg = document.createElementNS(NS, 'svg:svg'); + svg.setAttributeNS(null, 'version', '1.1'); + svg.setAttributeNS(null, 'width', width + 'px'); + svg.setAttributeNS(null, 'height', height + 'px'); + svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height); + return svg; + } - /* - W1. Examine each non-spacing mark (NSM) in the level run, and change the - type of the NSM to the type of the previous character. If the NSM is at the - start of the level run, it will get the type of sor. - */ - var lastType = sor; - for (i = 0; i < strLength; ++i) { - if (types[i] === 'NSM') { - types[i] = lastType; - } else { - lastType = types[i]; - } - } + function opListToTree(opList) { + var opTree = []; + var tmp = []; + var opListLen = opList.length; - /* - W2. Search backwards from each instance of a European number until the - first strong type (R, L, AL, or sor) is found. If an AL is found, change - the type of the European number to Arabic number. - */ - lastType = sor; - var t; - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'EN') { - types[i] = (lastType === 'AL') ? 'AN' : 'EN'; - } else if (t === 'R' || t === 'L' || t === 'AL') { - lastType = t; + for (var x = 0; x < opListLen; x++) { + if (opList[x].fn === 'save') { + opTree.push({'fnId': 92, 'fn': 'group', 'items': []}); + tmp.push(opTree); + opTree = opTree[opTree.length - 1].items; + continue; } - } - /* - W3. Change all ALs to R. - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'AL') { - types[i] = 'R'; + if(opList[x].fn === 'restore') { + opTree = tmp.pop(); + } else { + opTree.push(opList[x]); } } + return opTree; + } - /* - W4. A single European separator between two European numbers changes to a - European number. A single common separator between two numbers of the same - type changes to that type: - */ - for (i = 1; i < strLength - 1; ++i) { - if (types[i] === 'ES' && types[i - 1] === 'EN' && types[i + 1] === 'EN') { - types[i] = 'EN'; - } - if (types[i] === 'CS' && - (types[i - 1] === 'EN' || types[i - 1] === 'AN') && - types[i + 1] === types[i - 1]) { - types[i] = types[i - 1]; - } + /** + * Formats float number. + * @param value {number} number to format. + * @returns {string} + */ + function pf(value) { + if (value === (value | 0)) { // integer number + return value.toString(); + } + var s = value.toFixed(10); + var i = s.length - 1; + if (s[i] !== '0') { + return s; } + // removing trailing zeros + do { + i--; + } while (s[i] === '0'); + return s.substr(0, s[i] === '.' ? i : i + 1); + } - /* - W5. A sequence of European terminators adjacent to European numbers changes - to all European numbers: - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'EN') { - // do before - var j; - for (j = i - 1; j >= 0; --j) { - if (types[j] !== 'ET') { - break; - } - types[j] = 'EN'; - } - // do after - for (j = i + 1; j < strLength; --j) { - if (types[j] !== 'ET') { - break; - } - types[j] = 'EN'; + /** + * Formats transform matrix. The standard rotation, scale and translate + * matrices are replaced by their shorter forms, and for identity matrix + * returns empty string to save the memory. + * @param m {Array} matrix to format. + * @returns {string} + */ + function pm(m) { + if (m[4] === 0 && m[5] === 0) { + if (m[1] === 0 && m[2] === 0) { + if (m[0] === 1 && m[3] === 1) { + return ''; } + return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')'; } - } - - /* - W6. Otherwise, separators and terminators change to Other Neutral: - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'WS' || t === 'ES' || t === 'ET' || t === 'CS') { - types[i] = 'ON'; + if (m[0] === m[3] && m[1] === -m[2]) { + var a = Math.acos(m[0]) * 180 / Math.PI; + return 'rotate(' + pf(a) + ')'; } - } - - /* - W7. Search backwards from each instance of a European number until the - first strong type (R, L, or sor) is found. If an L is found, then change - the type of the European number to L. - */ - lastType = sor; - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'EN') { - types[i] = ((lastType === 'L') ? 'L' : 'EN'); - } else if (t === 'R' || t === 'L') { - lastType = t; + } else { + if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) { + return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')'; } } + return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' + + pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')'; + } - /* - N1. A sequence of neutrals takes the direction of the surrounding strong - text if the text on both sides has the same direction. European and Arabic - numbers are treated as though they were R. Start-of-level-run (sor) and - end-of-level-run (eor) are used at level run boundaries. - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'ON') { - var end = findUnequal(types, i + 1, 'ON'); - var before = sor; - if (i > 0) { - before = types[i - 1]; - } + function SVGGraphics(commonObjs, objs) { + this.current = new SVGExtraState(); + this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix + this.transformStack = []; + this.extraStack = []; + this.commonObjs = commonObjs; + this.objs = objs; + this.pendingEOFill = false; - var after = eor; - if (end + 1 < strLength) { - after = types[end + 1]; - } - if (before !== 'L') { - before = 'R'; - } - if (after !== 'L') { - after = 'R'; - } - if (before === after) { - setValues(types, i, end, before); - } - i = end - 1; // reset to end (-1 so next iteration is ok) - } - } + this.embedFonts = false; + this.embeddedFonts = {}; + this.cssStyle = null; + } - /* - N2. Any remaining neutrals take the embedding direction. - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'ON') { - types[i] = e; - } - } + var NS = 'http://www.w3.org/2000/svg'; + var XML_NS = 'http://www.w3.org/XML/1998/namespace'; + var XLINK_NS = 'http://www.w3.org/1999/xlink'; + var LINE_CAP_STYLES = ['butt', 'round', 'square']; + var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; + var clipCount = 0; + var maskCount = 0; - /* - I1. For all characters with an even (left-to-right) embedding direction, - those of type R go up one level and those of type AN or EN go up two - levels. - I2. For all characters with an odd (right-to-left) embedding direction, - those of type L, EN or AN go up one level. - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (isEven(levels[i])) { - if (t === 'R') { - levels[i] += 1; - } else if (t === 'AN' || t === 'EN') { - levels[i] += 2; - } - } else { // isOdd - if (t === 'L' || t === 'AN' || t === 'EN') { - levels[i] += 1; + SVGGraphics.prototype = { + save: function SVGGraphics_save() { + this.transformStack.push(this.transformMatrix); + var old = this.current; + this.extraStack.push(old); + this.current = old.clone(); + }, + + restore: function SVGGraphics_restore() { + this.transformMatrix = this.transformStack.pop(); + this.current = this.extraStack.pop(); + + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.pgrp.appendChild(this.tgrp); + }, + + group: function SVGGraphics_group(items) { + this.save(); + this.executeOpTree(items); + this.restore(); + }, + + loadDependencies: function SVGGraphics_loadDependencies(operatorList) { + var fnArray = operatorList.fnArray; + var fnArrayLen = fnArray.length; + var argsArray = operatorList.argsArray; + + var self = this; + for (var i = 0; i < fnArrayLen; i++) { + if (OPS.dependency === fnArray[i]) { + var deps = argsArray[i]; + for (var n = 0, nn = deps.length; n < nn; n++) { + var obj = deps[n]; + var common = obj.substring(0, 2) === 'g_'; + var promise; + if (common) { + promise = new Promise(function(resolve) { + self.commonObjs.get(obj, resolve); + }); + } else { + promise = new Promise(function(resolve) { + self.objs.get(obj, resolve); + }); + } + this.current.dependencies.push(promise); + } } } - } + return Promise.all(this.current.dependencies); + }, - /* - L1. On each line, reset the embedding level of the following characters to - the paragraph embedding level: + transform: function SVGGraphics_transform(a, b, c, d, e, f) { + var transformMatrix = [a, b, c, d, e, f]; + this.transformMatrix = PDFJS.Util.transform(this.transformMatrix, + transformMatrix); - segment separators, - paragraph separators, - any sequence of whitespace characters preceding a segment separator or - paragraph separator, and any sequence of white space characters at the end - of the line. - */ + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + }, - // don't bother as text is only single line + getSVG: function SVGGraphics_getSVG(operatorList, viewport) { + this.svg = createScratchSVG(viewport.width, viewport.height); + this.viewport = viewport; - /* - L2. From the highest level found in the text to the lowest odd level on - each line, reverse any contiguous sequence of characters that are at that - level or higher. - */ + return this.loadDependencies(operatorList).then(function () { + this.transformMatrix = IDENTITY_MATRIX; + this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group + this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform)); + this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.defs = document.createElementNS(NS, 'svg:defs'); + this.pgrp.appendChild(this.defs); + this.pgrp.appendChild(this.tgrp); + this.svg.appendChild(this.pgrp); + var opTree = this.convertOpList(operatorList); + this.executeOpTree(opTree); + return this.svg; + }.bind(this)); + }, - // find highest level & lowest odd level - var highestLevel = -1; - var lowestOddLevel = 99; - var level; - for (i = 0, ii = levels.length; i < ii; ++i) { - level = levels[i]; - if (highestLevel < level) { - highestLevel = level; + convertOpList: function SVGGraphics_convertOpList(operatorList) { + var argsArray = operatorList.argsArray; + var fnArray = operatorList.fnArray; + var fnArrayLen = fnArray.length; + var REVOPS = []; + var opList = []; + + for (var op in OPS) { + REVOPS[OPS[op]] = op; } - if (lowestOddLevel > level && isOdd(level)) { - lowestOddLevel = level; + + for (var x = 0; x < fnArrayLen; x++) { + var fnId = fnArray[x]; + opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]}); } - } + return opListToTree(opList); + }, - // now reverse between those limits - for (level = highestLevel; level >= lowestOddLevel; --level) { - // find segments to reverse - var start = -1; - for (i = 0, ii = levels.length; i < ii; ++i) { - if (levels[i] < level) { - if (start >= 0) { - reverseValues(chars, start, i); - start = -1; - } - } else if (start < 0) { - start = i; + executeOpTree: function SVGGraphics_executeOpTree(opTree) { + var opTreeLen = opTree.length; + for(var x = 0; x < opTreeLen; x++) { + var fn = opTree[x].fn; + var fnId = opTree[x].fnId; + var args = opTree[x].args; + + switch (fnId | 0) { + case OPS.beginText: + this.beginText(); + break; + case OPS.setLeading: + this.setLeading(args); + break; + case OPS.setLeadingMoveText: + this.setLeadingMoveText(args[0], args[1]); + break; + case OPS.setFont: + this.setFont(args); + break; + case OPS.showText: + this.showText(args[0]); + break; + case OPS.showSpacedText: + this.showText(args[0]); + break; + case OPS.endText: + this.endText(); + break; + case OPS.moveText: + this.moveText(args[0], args[1]); + break; + case OPS.setCharSpacing: + this.setCharSpacing(args[0]); + break; + case OPS.setWordSpacing: + this.setWordSpacing(args[0]); + break; + case OPS.setHScale: + this.setHScale(args[0]); + break; + case OPS.setTextMatrix: + this.setTextMatrix(args[0], args[1], args[2], + args[3], args[4], args[5]); + break; + case OPS.setLineWidth: + this.setLineWidth(args[0]); + break; + case OPS.setLineJoin: + this.setLineJoin(args[0]); + break; + case OPS.setLineCap: + this.setLineCap(args[0]); + break; + case OPS.setMiterLimit: + this.setMiterLimit(args[0]); + break; + case OPS.setFillRGBColor: + this.setFillRGBColor(args[0], args[1], args[2]); + break; + case OPS.setStrokeRGBColor: + this.setStrokeRGBColor(args[0], args[1], args[2]); + break; + case OPS.setDash: + this.setDash(args[0], args[1]); + break; + case OPS.setGState: + this.setGState(args[0]); + break; + case OPS.fill: + this.fill(); + break; + case OPS.eoFill: + this.eoFill(); + break; + case OPS.stroke: + this.stroke(); + break; + case OPS.fillStroke: + this.fillStroke(); + break; + case OPS.eoFillStroke: + this.eoFillStroke(); + break; + case OPS.clip: + this.clip('nonzero'); + break; + case OPS.eoClip: + this.clip('evenodd'); + break; + case OPS.paintSolidColorImageMask: + this.paintSolidColorImageMask(); + break; + case OPS.paintJpegXObject: + this.paintJpegXObject(args[0], args[1], args[2]); + break; + case OPS.paintImageXObject: + this.paintImageXObject(args[0]); + break; + case OPS.paintInlineImageXObject: + this.paintInlineImageXObject(args[0]); + break; + case OPS.paintImageMaskXObject: + this.paintImageMaskXObject(args[0]); + break; + case OPS.paintFormXObjectBegin: + this.paintFormXObjectBegin(args[0], args[1]); + break; + case OPS.paintFormXObjectEnd: + this.paintFormXObjectEnd(); + break; + case OPS.closePath: + this.closePath(); + break; + case OPS.closeStroke: + this.closeStroke(); + break; + case OPS.closeFillStroke: + this.closeFillStroke(); + break; + case OPS.nextLine: + this.nextLine(); + break; + case OPS.transform: + this.transform(args[0], args[1], args[2], args[3], + args[4], args[5]); + break; + case OPS.constructPath: + this.constructPath(args[0], args[1]); + break; + case OPS.endPath: + this.endPath(); + break; + case 92: + this.group(opTree[x].items); + break; + default: + warn('Unimplemented method '+ fn); + break; } } - if (start >= 0) { - reverseValues(chars, start, levels.length); - } - } + }, - /* - L3. Combining marks applied to a right-to-left base character will at this - point precede their base character. If the rendering engine expects them to - follow the base characters in the final display process, then the ordering - of the marks and the base character must be reversed. - */ + setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) { + this.current.wordSpacing = wordSpacing; + }, - // don't bother for now + setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) { + this.current.charSpacing = charSpacing; + }, - /* - L4. A character that possesses the mirrored property as specified by - Section 4.7, Mirrored, must be depicted by a mirrored glyph if the resolved - directionality of that character is R. - */ + nextLine: function SVGGraphics_nextLine() { + this.moveText(0, this.current.leading); + }, - // don't mirror as characters are already mirrored in the pdf + setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) { + var current = this.current; + this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f]; - // Finally, return string - for (i = 0, ii = chars.length; i < ii; ++i) { - var ch = chars[i]; - if (ch === '<' || ch === '>') { - chars[i] = ''; - } - } - return createBidiText(chars.join(''), isLTR); - } + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; - return bidi; -})(); + current.xcoords = []; + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); -exports.bidi = bidi; -})); + current.txtElement = document.createElementNS(NS, 'svg:text'); + current.txtElement.appendChild(current.tspan); + }, + beginText: function SVGGraphics_beginText() { + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + this.current.textMatrix = IDENTITY_MATRIX; + this.current.lineMatrix = IDENTITY_MATRIX; + this.current.tspan = document.createElementNS(NS, 'svg:tspan'); + this.current.txtElement = document.createElementNS(NS, 'svg:text'); + this.current.txtgrp = document.createElementNS(NS, 'svg:g'); + this.current.xcoords = []; + }, -(function (root, factory) { - { - factory((root.pdfjsCoreChunkedStream = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { + moveText: function SVGGraphics_moveText(x, y) { + var current = this.current; + this.current.x = this.current.lineX += x; + this.current.y = this.current.lineY += y; -var MissingDataException = sharedUtil.MissingDataException; -var assert = sharedUtil.assert; -var createPromiseCapability = sharedUtil.createPromiseCapability; -var isInt = sharedUtil.isInt; -var isEmptyObj = sharedUtil.isEmptyObj; + current.xcoords = []; + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + }, -var ChunkedStream = (function ChunkedStreamClosure() { - function ChunkedStream(length, chunkSize, manager) { - this.bytes = new Uint8Array(length); - this.start = 0; - this.pos = 0; - this.end = length; - this.chunkSize = chunkSize; - this.loadedChunks = []; - this.numChunksLoaded = 0; - this.numChunks = Math.ceil(length / chunkSize); - this.manager = manager; - this.progressiveDataLength = 0; - this.lastSuccessfulEnsureByteChunk = -1; // a single-entry cache - } + showText: function SVGGraphics_showText(glyphs) { + var current = this.current; + var font = current.font; + var fontSize = current.fontSize; - // required methods for a stream. if a particular stream does not - // implement these, an error should be thrown - ChunkedStream.prototype = { + if (fontSize === 0) { + return; + } - getMissingChunks: function ChunkedStream_getMissingChunks() { - var chunks = []; - for (var chunk = 0, n = this.numChunks; chunk < n; ++chunk) { - if (!this.loadedChunks[chunk]) { - chunks.push(chunk); + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var fontDirection = current.fontDirection; + var textHScale = current.textHScale * fontDirection; + var glyphsLength = glyphs.length; + var vertical = font.vertical; + var widthAdvanceScale = fontSize * current.fontMatrix[0]; + + var x = 0, i; + for (i = 0; i < glyphsLength; ++i) { + var glyph = glyphs[i]; + if (glyph === null) { + // word break + x += fontDirection * wordSpacing; + continue; + } else if (isNum(glyph)) { + x += -glyph * fontSize * 0.001; + continue; } - } - return chunks; - }, + current.xcoords.push(current.x + x * textHScale); - getBaseStreams: function ChunkedStream_getBaseStreams() { - return [this]; - }, + var width = glyph.width; + var character = glyph.fontChar; + var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; + x += charWidth; - allChunksLoaded: function ChunkedStream_allChunksLoaded() { - return this.numChunksLoaded === this.numChunks; - }, + current.tspan.textContent += character; + } + if (vertical) { + current.y -= x * textHScale; + } else { + current.x += x * textHScale; + } - onReceiveData: function ChunkedStream_onReceiveData(begin, chunk) { - var end = begin + chunk.byteLength; + current.tspan.setAttributeNS(null, 'x', + current.xcoords.map(pf).join(' ')); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + if (current.fontStyle !== SVG_DEFAULTS.fontStyle) { + current.tspan.setAttributeNS(null, 'font-style', current.fontStyle); + } + if (current.fontWeight !== SVG_DEFAULTS.fontWeight) { + current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight); + } + if (current.fillColor !== SVG_DEFAULTS.fillColor) { + current.tspan.setAttributeNS(null, 'fill', current.fillColor); + } - assert(begin % this.chunkSize === 0, 'Bad begin offset: ' + begin); - // Using this.length is inaccurate here since this.start can be moved - // See ChunkedStream.moveStart() - var length = this.bytes.length; - assert(end % this.chunkSize === 0 || end === length, - 'Bad end offset: ' + end); + current.txtElement.setAttributeNS(null, 'transform', + pm(current.textMatrix) + + ' scale(1, -1)' ); + current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve'); + current.txtElement.appendChild(current.tspan); + current.txtgrp.appendChild(current.txtElement); - this.bytes.set(new Uint8Array(chunk), begin); - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - var curChunk; + this.tgrp.appendChild(current.txtElement); - for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { - if (!this.loadedChunks[curChunk]) { - this.loadedChunks[curChunk] = true; - ++this.numChunksLoaded; - } - } }, - onReceiveProgressiveData: - function ChunkedStream_onReceiveProgressiveData(data) { - var position = this.progressiveDataLength; - var beginChunk = Math.floor(position / this.chunkSize); - - this.bytes.set(new Uint8Array(data), position); - position += data.byteLength; - this.progressiveDataLength = position; - var endChunk = position >= this.end ? this.numChunks : - Math.floor(position / this.chunkSize); - var curChunk; - for (curChunk = beginChunk; curChunk < endChunk; ++curChunk) { - if (!this.loadedChunks[curChunk]) { - this.loadedChunks[curChunk] = true; - ++this.numChunksLoaded; - } - } + setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) { + this.setLeading(-y); + this.moveText(x, y); }, - ensureByte: function ChunkedStream_ensureByte(pos) { - var chunk = Math.floor(pos / this.chunkSize); - if (chunk === this.lastSuccessfulEnsureByteChunk) { - return; + addFontStyle: function SVGGraphics_addFontStyle(fontObj) { + if (!this.cssStyle) { + this.cssStyle = document.createElementNS(NS, 'svg:style'); + this.cssStyle.setAttributeNS(null, 'type', 'text/css'); + this.defs.appendChild(this.cssStyle); } - if (!this.loadedChunks[chunk]) { - throw new MissingDataException(pos, pos + 1); - } - this.lastSuccessfulEnsureByteChunk = chunk; + var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype); + this.cssStyle.textContent += + '@font-face { font-family: "' + fontObj.loadedName + '";' + + ' src: url(' + url + '); }\n'; }, - ensureRange: function ChunkedStream_ensureRange(begin, end) { - if (begin >= end) { - return; - } + setFont: function SVGGraphics_setFont(details) { + var current = this.current; + var fontObj = this.commonObjs.get(details[0]); + var size = details[1]; + this.current.font = fontObj; - if (end <= this.progressiveDataLength) { - return; + if (this.embedFonts && fontObj.data && + !this.embeddedFonts[fontObj.loadedName]) { + this.addFontStyle(fontObj); + this.embeddedFonts[fontObj.loadedName] = fontObj; } - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(begin / chunkSize); - var endChunk = Math.floor((end - 1) / chunkSize) + 1; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!this.loadedChunks[chunk]) { - throw new MissingDataException(begin, end); - } + current.fontMatrix = (fontObj.fontMatrix ? + fontObj.fontMatrix : FONT_IDENTITY_MATRIX); + + var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); + var italic = fontObj.italic ? 'italic' : 'normal'; + + if (size < 0) { + size = -size; + current.fontDirection = -1; + } else { + current.fontDirection = 1; } + current.fontSize = size; + current.fontFamily = fontObj.loadedName; + current.fontWeight = bold; + current.fontStyle = italic; + + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + current.xcoords = []; }, - nextEmptyChunk: function ChunkedStream_nextEmptyChunk(beginChunk) { - var chunk, numChunks = this.numChunks; - for (var i = 0; i < numChunks; ++i) { - chunk = (beginChunk + i) % numChunks; // Wrap around to beginning - if (!this.loadedChunks[chunk]) { - return chunk; - } + endText: function SVGGraphics_endText() { + if (this.current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); } - return null; + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); }, - hasChunk: function ChunkedStream_hasChunk(chunk) { - return !!this.loadedChunks[chunk]; + // Path properties + setLineWidth: function SVGGraphics_setLineWidth(width) { + this.current.lineWidth = width; }, - - get length() { - return this.end - this.start; + setLineCap: function SVGGraphics_setLineCap(style) { + this.current.lineCap = LINE_CAP_STYLES[style]; }, - - get isEmpty() { - return this.length === 0; + setLineJoin: function SVGGraphics_setLineJoin(style) { + this.current.lineJoin = LINE_JOIN_STYLES[style]; }, - - getByte: function ChunkedStream_getByte() { - var pos = this.pos; - if (pos >= this.end) { - return -1; - } - this.ensureByte(pos); - return this.bytes[this.pos++]; + setMiterLimit: function SVGGraphics_setMiterLimit(limit) { + this.current.miterLimit = limit; }, - - getUint16: function ChunkedStream_getUint16() { - var b0 = this.getByte(); - var b1 = this.getByte(); - if (b0 === -1 || b1 === -1) { - return -1; - } - return (b0 << 8) + b1; + setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.current.strokeColor = color; }, - - getInt32: function ChunkedStream_getInt32() { - var b0 = this.getByte(); - var b1 = this.getByte(); - var b2 = this.getByte(); - var b3 = this.getByte(); - return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.current.fillColor = color; + this.current.tspan = document.createElementNS(NS, 'svg:tspan'); + this.current.xcoords = []; + }, + setDash: function SVGGraphics_setDash(dashArray, dashPhase) { + this.current.dashArray = dashArray; + this.current.dashPhase = dashPhase; }, - // returns subarray of original buffer - // should only be read - getBytes: function ChunkedStream_getBytes(length) { - var bytes = this.bytes; - var pos = this.pos; - var strEnd = this.end; + constructPath: function SVGGraphics_constructPath(ops, args) { + var current = this.current; + var x = current.x, y = current.y; + current.path = document.createElementNS(NS, 'svg:path'); + var d = []; + var opLength = ops.length; - if (!length) { - this.ensureRange(pos, strEnd); - return bytes.subarray(pos, strEnd); + for (var i = 0, j = 0; i < opLength; i++) { + switch (ops[i] | 0) { + case OPS.rectangle: + x = args[j++]; + y = args[j++]; + var width = args[j++]; + var height = args[j++]; + var xw = x + width; + var yh = y + height; + d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh), + 'L', pf(x), pf(yh), 'Z'); + break; + case OPS.moveTo: + x = args[j++]; + y = args[j++]; + d.push('M', pf(x), pf(y)); + break; + case OPS.lineTo: + x = args[j++]; + y = args[j++]; + d.push('L', pf(x) , pf(y)); + break; + case OPS.curveTo: + x = args[j + 4]; + y = args[j + 5]; + d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]), + pf(args[j + 3]), pf(x), pf(y)); + j += 6; + break; + case OPS.curveTo2: + x = args[j + 2]; + y = args[j + 3]; + d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]), + pf(args[j + 2]), pf(args[j + 3])); + j += 4; + break; + case OPS.curveTo3: + x = args[j + 2]; + y = args[j + 3]; + d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y), + pf(x), pf(y)); + j += 4; + break; + case OPS.closePath: + d.push('Z'); + break; + } } + current.path.setAttributeNS(null, 'd', d.join(' ')); + current.path.setAttributeNS(null, 'stroke-miterlimit', + pf(current.miterLimit)); + current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap); + current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin); + current.path.setAttributeNS(null, 'stroke-width', + pf(current.lineWidth) + 'px'); + current.path.setAttributeNS(null, 'stroke-dasharray', + current.dashArray.map(pf).join(' ')); + current.path.setAttributeNS(null, 'stroke-dashoffset', + pf(current.dashPhase) + 'px'); + current.path.setAttributeNS(null, 'fill', 'none'); - var end = pos + length; - if (end > strEnd) { - end = strEnd; + this.tgrp.appendChild(current.path); + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); } - this.ensureRange(pos, end); - - this.pos = end; - return bytes.subarray(pos, end); + // Saving a reference in current.element so that it can be addressed + // in 'fill' and 'stroke' + current.element = current.path; + current.setCurrentPoint(x, y); }, - peekByte: function ChunkedStream_peekByte() { - var peekedByte = this.getByte(); - this.pos--; - return peekedByte; + endPath: function SVGGraphics_endPath() { + var current = this.current; + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); + } + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); }, - peekBytes: function ChunkedStream_peekBytes(length) { - var bytes = this.getBytes(length); - this.pos -= bytes.length; - return bytes; + clip: function SVGGraphics_clip(type) { + var current = this.current; + // Add current path to clipping path + current.clipId = 'clippath' + clipCount; + clipCount++; + this.clippath = document.createElementNS(NS, 'svg:clipPath'); + this.clippath.setAttributeNS(null, 'id', current.clipId); + var clipElement = current.element.cloneNode(); + if (type === 'evenodd') { + clipElement.setAttributeNS(null, 'clip-rule', 'evenodd'); + } else { + clipElement.setAttributeNS(null, 'clip-rule', 'nonzero'); + } + this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.clippath.appendChild(clipElement); + this.defs.appendChild(this.clippath); + + // Create a new group with that attribute + current.pendingClip = true; + this.cgrp = document.createElementNS(NS, 'svg:g'); + this.cgrp.setAttributeNS(null, 'clip-path', + 'url(#' + current.clipId + ')'); + this.pgrp.appendChild(this.cgrp); }, - getByteRange: function ChunkedStream_getBytes(begin, end) { - this.ensureRange(begin, end); - return this.bytes.subarray(begin, end); + closePath: function SVGGraphics_closePath() { + var current = this.current; + var d = current.path.getAttributeNS(null, 'd'); + d += 'Z'; + current.path.setAttributeNS(null, 'd', d); }, - skip: function ChunkedStream_skip(n) { - if (!n) { - n = 1; - } - this.pos += n; + setLeading: function SVGGraphics_setLeading(leading) { + this.current.leading = -leading; }, - reset: function ChunkedStream_reset() { - this.pos = this.start; + setTextRise: function SVGGraphics_setTextRise(textRise) { + this.current.textRise = textRise; }, - moveStart: function ChunkedStream_moveStart() { - this.start = this.pos; + setHScale: function SVGGraphics_setHScale(scale) { + this.current.textHScale = scale / 100; }, - makeSubStream: function ChunkedStream_makeSubStream(start, length, dict) { - this.ensureRange(start, start + length); + setGState: function SVGGraphics_setGState(states) { + for (var i = 0, ii = states.length; i < ii; i++) { + var state = states[i]; + var key = state[0]; + var value = state[1]; - function ChunkedStreamSubstream() {} - ChunkedStreamSubstream.prototype = Object.create(this); - ChunkedStreamSubstream.prototype.getMissingChunks = function() { - var chunkSize = this.chunkSize; - var beginChunk = Math.floor(this.start / chunkSize); - var endChunk = Math.floor((this.end - 1) / chunkSize) + 1; - var missingChunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (!this.loadedChunks[chunk]) { - missingChunks.push(chunk); - } + switch (key) { + case 'LW': + this.setLineWidth(value); + break; + case 'LC': + this.setLineCap(value); + break; + case 'LJ': + this.setLineJoin(value); + break; + case 'ML': + this.setMiterLimit(value); + break; + case 'D': + this.setDash(value[0], value[1]); + break; + case 'RI': + break; + case 'FL': + break; + case 'Font': + this.setFont(value); + break; + case 'CA': + break; + case 'ca': + break; + case 'BM': + break; + case 'SMask': + break; } - return missingChunks; - }; - var subStream = new ChunkedStreamSubstream(); - subStream.pos = subStream.start = start; - subStream.end = start + length || this.end; - subStream.dict = dict; - return subStream; + } }, - isStream: true - }; - - return ChunkedStream; -})(); - -var ChunkedStreamManager = (function ChunkedStreamManagerClosure() { - - function ChunkedStreamManager(length, chunkSize, url, args) { - this.stream = new ChunkedStream(length, chunkSize, this); - this.length = length; - this.chunkSize = chunkSize; - this.url = url; - this.disableAutoFetch = args.disableAutoFetch; - var msgHandler = this.msgHandler = args.msgHandler; - - if (args.chunkedViewerLoading) { - msgHandler.on('OnDataRange', this.onReceiveData.bind(this)); - msgHandler.on('OnDataProgress', this.onProgress.bind(this)); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - msgHandler.send('RequestDataRange', { begin: begin, end: end }); - }; - } else { + fill: function SVGGraphics_fill() { + var current = this.current; + current.element.setAttributeNS(null, 'fill', current.fillColor); + }, - var getXhr = function getXhr() { - return new XMLHttpRequest(); - }; - this.networkManager = new NetworkManager(this.url, { - getXhr: getXhr, - httpHeaders: args.httpHeaders, - withCredentials: args.withCredentials - }); - this.sendRequest = function ChunkedStreamManager_sendRequest(begin, end) { - this.networkManager.requestRange(begin, end, { - onDone: this.onReceiveData.bind(this), - onProgress: this.onProgress.bind(this) - }); - }; - } + stroke: function SVGGraphics_stroke() { + var current = this.current; + current.element.setAttributeNS(null, 'stroke', current.strokeColor); + current.element.setAttributeNS(null, 'fill', 'none'); + }, - this.currRequestId = 0; + eoFill: function SVGGraphics_eoFill() { + var current = this.current; + current.element.setAttributeNS(null, 'fill', current.fillColor); + current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); + }, - this.chunksNeededByRequest = {}; - this.requestsByChunk = {}; - this.promisesByRequest = {}; - this.progressiveDataLength = 0; + fillStroke: function SVGGraphics_fillStroke() { + // Order is important since stroke wants fill to be none. + // First stroke, then if fill needed, it will be overwritten. + this.stroke(); + this.fill(); + }, - this._loadedStreamCapability = createPromiseCapability(); + eoFillStroke: function SVGGraphics_eoFillStroke() { + this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); + this.fillStroke(); + }, - if (args.initialData) { - this.onReceiveData({chunk: args.initialData}); - } - } + closeStroke: function SVGGraphics_closeStroke() { + this.closePath(); + this.stroke(); + }, - ChunkedStreamManager.prototype = { - onLoadedStream: function ChunkedStreamManager_getLoadedStream() { - return this._loadedStreamCapability.promise; + closeFillStroke: function SVGGraphics_closeFillStroke() { + this.closePath(); + this.fillStroke(); }, - // Get all the chunks that are not yet loaded and groups them into - // contiguous ranges to load in as few requests as possible - requestAllChunks: function ChunkedStreamManager_requestAllChunks() { - var missingChunks = this.stream.getMissingChunks(); - this._requestChunks(missingChunks); - return this._loadedStreamCapability.promise; + paintSolidColorImageMask: + function SVGGraphics_paintSolidColorImageMask() { + var current = this.current; + var rect = document.createElementNS(NS, 'svg:rect'); + rect.setAttributeNS(null, 'x', '0'); + rect.setAttributeNS(null, 'y', '0'); + rect.setAttributeNS(null, 'width', '1px'); + rect.setAttributeNS(null, 'height', '1px'); + rect.setAttributeNS(null, 'fill', current.fillColor); + this.tgrp.appendChild(rect); }, - _requestChunks: function ChunkedStreamManager_requestChunks(chunks) { - var requestId = this.currRequestId++; + paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) { + var current = this.current; + var imgObj = this.objs.get(objId); + var imgEl = document.createElementNS(NS, 'svg:image'); + imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src); + imgEl.setAttributeNS(null, 'width', imgObj.width + 'px'); + imgEl.setAttributeNS(null, 'height', imgObj.height + 'px'); + imgEl.setAttributeNS(null, 'x', '0'); + imgEl.setAttributeNS(null, 'y', pf(-h)); + imgEl.setAttributeNS(null, 'transform', + 'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')'); - var chunksNeeded; - var i, ii; - this.chunksNeededByRequest[requestId] = chunksNeeded = {}; - for (i = 0, ii = chunks.length; i < ii; i++) { - if (!this.stream.hasChunk(chunks[i])) { - chunksNeeded[chunks[i]] = true; - } + this.tgrp.appendChild(imgEl); + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); } + }, - if (isEmptyObj(chunksNeeded)) { - return Promise.resolve(); + paintImageXObject: function SVGGraphics_paintImageXObject(objId) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; } + this.paintInlineImageXObject(imgData); + }, - var capability = createPromiseCapability(); - this.promisesByRequest[requestId] = capability; + paintInlineImageXObject: + function SVGGraphics_paintInlineImageXObject(imgData, mask) { + var current = this.current; + var width = imgData.width; + var height = imgData.height; - var chunksToRequest = []; - for (var chunk in chunksNeeded) { - chunk = chunk | 0; - if (!(chunk in this.requestsByChunk)) { - this.requestsByChunk[chunk] = []; - chunksToRequest.push(chunk); - } - this.requestsByChunk[chunk].push(requestId); + var imgSrc = convertImgDataToPng(imgData); + var cliprect = document.createElementNS(NS, 'svg:rect'); + cliprect.setAttributeNS(null, 'x', '0'); + cliprect.setAttributeNS(null, 'y', '0'); + cliprect.setAttributeNS(null, 'width', pf(width)); + cliprect.setAttributeNS(null, 'height', pf(height)); + current.element = cliprect; + this.clip('nonzero'); + var imgEl = document.createElementNS(NS, 'svg:image'); + imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc); + imgEl.setAttributeNS(null, 'x', '0'); + imgEl.setAttributeNS(null, 'y', pf(-height)); + imgEl.setAttributeNS(null, 'width', pf(width) + 'px'); + imgEl.setAttributeNS(null, 'height', pf(height) + 'px'); + imgEl.setAttributeNS(null, 'transform', + 'scale(' + pf(1 / width) + ' ' + + pf(-1 / height) + ')'); + if (mask) { + mask.appendChild(imgEl); + } else { + this.tgrp.appendChild(imgEl); } - - if (!chunksToRequest.length) { - return capability.promise; + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); } + }, - var groupedChunksToRequest = this.groupChunks(chunksToRequest); + paintImageMaskXObject: + function SVGGraphics_paintImageMaskXObject(imgData) { + var current = this.current; + var width = imgData.width; + var height = imgData.height; + var fillColor = current.fillColor; - for (i = 0; i < groupedChunksToRequest.length; ++i) { - var groupedChunk = groupedChunksToRequest[i]; - var begin = groupedChunk.beginChunk * this.chunkSize; - var end = Math.min(groupedChunk.endChunk * this.chunkSize, this.length); - this.sendRequest(begin, end); - } + current.maskId = 'mask' + maskCount++; + var mask = document.createElementNS(NS, 'svg:mask'); + mask.setAttributeNS(null, 'id', current.maskId); - return capability.promise; - }, + var rect = document.createElementNS(NS, 'svg:rect'); + rect.setAttributeNS(null, 'x', '0'); + rect.setAttributeNS(null, 'y', '0'); + rect.setAttributeNS(null, 'width', pf(width)); + rect.setAttributeNS(null, 'height', pf(height)); + rect.setAttributeNS(null, 'fill', fillColor); + rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')'); + this.defs.appendChild(mask); + this.tgrp.appendChild(rect); - getStream: function ChunkedStreamManager_getStream() { - return this.stream; + this.paintInlineImageXObject(imgData, mask); }, - // Loads any chunks in the requested range that are not yet loaded - requestRange: function ChunkedStreamManager_requestRange(begin, end) { + paintFormXObjectBegin: + function SVGGraphics_paintFormXObjectBegin(matrix, bbox) { + this.save(); - end = Math.min(end, this.length); + if (isArray(matrix) && matrix.length === 6) { + this.transform(matrix[0], matrix[1], matrix[2], + matrix[3], matrix[4], matrix[5]); + } - var beginChunk = this.getBeginChunk(begin); - var endChunk = this.getEndChunk(end); + if (isArray(bbox) && bbox.length === 4) { + var width = bbox[2] - bbox[0]; + var height = bbox[3] - bbox[1]; - var chunks = []; - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - chunks.push(chunk); + var cliprect = document.createElementNS(NS, 'svg:rect'); + cliprect.setAttributeNS(null, 'x', bbox[0]); + cliprect.setAttributeNS(null, 'y', bbox[1]); + cliprect.setAttributeNS(null, 'width', pf(width)); + cliprect.setAttributeNS(null, 'height', pf(height)); + this.current.element = cliprect; + this.clip('nonzero'); + this.endPath(); } - - return this._requestChunks(chunks); }, - requestRanges: function ChunkedStreamManager_requestRanges(ranges) { - ranges = ranges || []; - var chunksToRequest = []; + paintFormXObjectEnd: + function SVGGraphics_paintFormXObjectEnd() { + this.restore(); + } + }; + return SVGGraphics; +})(); + +PDFJS.SVGGraphics = SVGGraphics; - for (var i = 0; i < ranges.length; i++) { - var beginChunk = this.getBeginChunk(ranges[i].begin); - var endChunk = this.getEndChunk(ranges[i].end); - for (var chunk = beginChunk; chunk < endChunk; ++chunk) { - if (chunksToRequest.indexOf(chunk) < 0) { - chunksToRequest.push(chunk); - } - } - } +exports.SVGGraphics = SVGGraphics; +})); - chunksToRequest.sort(function(a, b) { return a - b; }); - return this._requestChunks(chunksToRequest); - }, - // Groups a sorted array of chunks into as few contiguous larger - // chunks as possible - groupChunks: function ChunkedStreamManager_groupChunks(chunks) { - var groupedChunks = []; - var beginChunk = -1; - var prevChunk = -1; - for (var i = 0; i < chunks.length; ++i) { - var chunk = chunks[i]; +(function (root, factory) { + { + factory((root.pdfjsDisplayTextLayer = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayDOMUtils, root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedUtil, displayDOMUtils, sharedGlobal) { - if (beginChunk < 0) { - beginChunk = chunk; - } +var Util = sharedUtil.Util; +var createPromiseCapability = sharedUtil.createPromiseCapability; +var CustomStyle = displayDOMUtils.CustomStyle; +var PDFJS = sharedGlobal.PDFJS; - if (prevChunk >= 0 && prevChunk + 1 !== chunk) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: prevChunk + 1 }); - beginChunk = chunk; - } - if (i + 1 === chunks.length) { - groupedChunks.push({ beginChunk: beginChunk, - endChunk: chunk + 1 }); - } +/** + * Text layer render parameters. + * + * @typedef {Object} TextLayerRenderParameters + * @property {TextContent} textContent - Text content to render (the object is + * returned by the page's getTextContent() method). + * @property {HTMLElement} container - HTML element that will contain text runs. + * @property {PDFJS.PageViewport} viewport - The target viewport to properly + * layout the text runs. + * @property {Array} textDivs - (optional) HTML elements that are correspond + * the text items of the textContent input. This is output and shall be + * initially be set to empty array. + * @property {number} timeout - (optional) Delay in milliseconds before + * rendering of the text runs occurs. + */ +var renderTextLayer = (function renderTextLayerClosure() { + var MAX_TEXT_DIVS_TO_RENDER = 100000; - prevChunk = chunk; - } - return groupedChunks; - }, + var NonWhitespaceRegexp = /\S/; - onProgress: function ChunkedStreamManager_onProgress(args) { - var bytesLoaded = (this.stream.numChunksLoaded * this.chunkSize + - args.loaded); - this.msgHandler.send('DocProgress', { - loaded: bytesLoaded, - total: this.length - }); - }, + function isAllWhitespace(str) { + return !NonWhitespaceRegexp.test(str); + } - onReceiveData: function ChunkedStreamManager_onReceiveData(args) { - var chunk = args.chunk; - var isProgressive = args.begin === undefined; - var begin = isProgressive ? this.progressiveDataLength : args.begin; - var end = begin + chunk.byteLength; + function appendText(textDivs, viewport, geom, styles) { + var style = styles[geom.fontName]; + var textDiv = document.createElement('div'); + textDivs.push(textDiv); + if (isAllWhitespace(geom.str)) { + textDiv.dataset.isWhitespace = true; + return; + } + var tx = Util.transform(viewport.transform, geom.transform); + var angle = Math.atan2(tx[1], tx[0]); + if (style.vertical) { + angle += Math.PI / 2; + } + var fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3])); + var fontAscent = fontHeight; + if (style.ascent) { + fontAscent = style.ascent * fontAscent; + } else if (style.descent) { + fontAscent = (1 + style.descent) * fontAscent; + } - var beginChunk = Math.floor(begin / this.chunkSize); - var endChunk = end < this.length ? Math.floor(end / this.chunkSize) : - Math.ceil(end / this.chunkSize); + var left; + var top; + if (angle === 0) { + left = tx[4]; + top = tx[5] - fontAscent; + } else { + left = tx[4] + (fontAscent * Math.sin(angle)); + top = tx[5] - (fontAscent * Math.cos(angle)); + } + textDiv.style.left = left + 'px'; + textDiv.style.top = top + 'px'; + textDiv.style.fontSize = fontHeight + 'px'; + textDiv.style.fontFamily = style.fontFamily; - if (isProgressive) { - this.stream.onReceiveProgressiveData(chunk); - this.progressiveDataLength = end; + textDiv.textContent = geom.str; + // |fontName| is only used by the Font Inspector. This test will succeed + // when e.g. the Font Inspector is off but the Stepper is on, but it's + // not worth the effort to do a more accurate test. + if (PDFJS.pdfBug) { + textDiv.dataset.fontName = geom.fontName; + } + // Storing into dataset will convert number into string. + if (angle !== 0) { + textDiv.dataset.angle = angle * (180 / Math.PI); + } + // We don't bother scaling single-char text divs, because it has very + // little effect on text highlighting. This makes scrolling on docs with + // lots of such divs a lot faster. + if (geom.str.length > 1) { + if (style.vertical) { + textDiv.dataset.canvasWidth = geom.height * viewport.scale; } else { - this.stream.onReceiveData(begin, chunk); + textDiv.dataset.canvasWidth = geom.width * viewport.scale; } + } + } - if (this.stream.allChunksLoaded()) { - this._loadedStreamCapability.resolve(this.stream); - } + function render(task) { + if (task._canceled) { + return; + } + var textLayerFrag = task._container; + var textDivs = task._textDivs; + var capability = task._capability; + var textDivsLength = textDivs.length; - var loadedRequests = []; - var i, requestId; - for (chunk = beginChunk; chunk < endChunk; ++chunk) { - // The server might return more chunks than requested - var requestIds = this.requestsByChunk[chunk] || []; - delete this.requestsByChunk[chunk]; + // No point in rendering many divs as it would make the browser + // unusable even after the divs are rendered. + if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) { + capability.resolve(); + return; + } - for (i = 0; i < requestIds.length; ++i) { - requestId = requestIds[i]; - var chunksNeeded = this.chunksNeededByRequest[requestId]; - if (chunk in chunksNeeded) { - delete chunksNeeded[chunk]; - } + var canvas = document.createElement('canvas'); + var ctx = canvas.getContext('2d', {alpha: false}); - if (!isEmptyObj(chunksNeeded)) { - continue; - } + var lastFontSize; + var lastFontFamily; + for (var i = 0; i < textDivsLength; i++) { + var textDiv = textDivs[i]; + if (textDiv.dataset.isWhitespace !== undefined) { + continue; + } - loadedRequests.push(requestId); - } + var fontSize = textDiv.style.fontSize; + var fontFamily = textDiv.style.fontFamily; + + // Only build font string and set to context if different from last. + if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) { + ctx.font = fontSize + ' ' + fontFamily; + lastFontSize = fontSize; + lastFontFamily = fontFamily; } - // If there are no pending requests, automatically fetch the next - // unfetched chunk of the PDF - if (!this.disableAutoFetch && isEmptyObj(this.requestsByChunk)) { - var nextEmptyChunk; - if (this.stream.numChunksLoaded === 1) { - // This is a special optimization so that after fetching the first - // chunk, rather than fetching the second chunk, we fetch the last - // chunk. - var lastChunk = this.stream.numChunks - 1; - if (!this.stream.hasChunk(lastChunk)) { - nextEmptyChunk = lastChunk; - } + var width = ctx.measureText(textDiv.textContent).width; + if (width > 0) { + textLayerFrag.appendChild(textDiv); + var transform; + if (textDiv.dataset.canvasWidth !== undefined) { + // Dataset values come of type string. + var textScale = textDiv.dataset.canvasWidth / width; + transform = 'scaleX(' + textScale + ')'; } else { - nextEmptyChunk = this.stream.nextEmptyChunk(endChunk); + transform = ''; } - if (isInt(nextEmptyChunk)) { - this._requestChunks([nextEmptyChunk]); + var rotation = textDiv.dataset.angle; + if (rotation) { + transform = 'rotate(' + rotation + 'deg) ' + transform; + } + if (transform) { + CustomStyle.setProp('transform' , textDiv, transform); } } + } + capability.resolve(); + } - for (i = 0; i < loadedRequests.length; ++i) { - requestId = loadedRequests[i]; - var capability = this.promisesByRequest[requestId]; - delete this.promisesByRequest[requestId]; - capability.resolve(); - } - - this.msgHandler.send('DocProgress', { - loaded: this.stream.numChunksLoaded * this.chunkSize, - total: this.length - }); - }, - - onError: function ChunkedStreamManager_onError(err) { - this._loadedStreamCapability.reject(err); - }, - - getBeginChunk: function ChunkedStreamManager_getBeginChunk(begin) { - var chunk = Math.floor(begin / this.chunkSize); - return chunk; + /** + * Text layer rendering task. + * + * @param {TextContent} textContent + * @param {HTMLElement} container + * @param {PDFJS.PageViewport} viewport + * @param {Array} textDivs + * @private + */ + function TextLayerRenderTask(textContent, container, viewport, textDivs) { + this._textContent = textContent; + this._container = container; + this._viewport = viewport; + textDivs = textDivs || []; + this._textDivs = textDivs; + this._canceled = false; + this._capability = createPromiseCapability(); + this._renderTimer = null; + } + TextLayerRenderTask.prototype = { + get promise() { + return this._capability.promise; }, - getEndChunk: function ChunkedStreamManager_getEndChunk(end) { - var chunk = Math.floor((end - 1) / this.chunkSize) + 1; - return chunk; + cancel: function TextLayer_cancel() { + this._canceled = true; + if (this._renderTimer !== null) { + clearTimeout(this._renderTimer); + this._renderTimer = null; + } + this._capability.reject('canceled'); }, - abort: function ChunkedStreamManager_abort() { - if (this.networkManager) { - this.networkManager.abortAllRequests(); + _render: function TextLayer_render(timeout) { + var textItems = this._textContent.items; + var styles = this._textContent.styles; + var textDivs = this._textDivs; + var viewport = this._viewport; + for (var i = 0, len = textItems.length; i < len; i++) { + appendText(textDivs, viewport, textItems[i], styles); } - for(var requestId in this.promisesByRequest) { - var capability = this.promisesByRequest[requestId]; - capability.reject(new Error('Request was aborted')); + + if (!timeout) { // Render right away + render(this); + } else { // Schedule + var self = this; + this._renderTimer = setTimeout(function() { + render(self); + self._renderTimer = null; + }, timeout); } } }; - return ChunkedStreamManager; + + /** + * Starts rendering of the text layer. + * + * @param {TextLayerRenderParameters} renderParameters + * @returns {TextLayerRenderTask} + */ + function renderTextLayer(renderParameters) { + var task = new TextLayerRenderTask(renderParameters.textContent, + renderParameters.container, + renderParameters.viewport, + renderParameters.textDivs); + task._render(renderParameters.timeout); + return task; + } + + return renderTextLayer; })(); -exports.ChunkedStream = ChunkedStream; -exports.ChunkedStreamManager = ChunkedStreamManager; +PDFJS.renderTextLayer = renderTextLayer; + +exports.renderTextLayer = renderTextLayer; })); (function (root, factory) { { - factory((root.pdfjsCoreJbig2 = {}), root.pdfjsSharedUtil, - root.pdfjsCoreArithmeticDecoder); + factory((root.pdfjsDisplayWebGL = {}), root.pdfjsSharedUtil); } -}(this, function (exports, sharedUtil, coreArithmeticDecoder) { +}(this, function (exports, sharedUtil) { -var error = sharedUtil.error; -var log2 = sharedUtil.log2; -var readInt8 = sharedUtil.readInt8; -var readUint16 = sharedUtil.readUint16; -var readUint32 = sharedUtil.readUint32; var shadow = sharedUtil.shadow; -var ArithmeticDecoder = coreArithmeticDecoder.ArithmeticDecoder; - -var Jbig2Image = (function Jbig2ImageClosure() { - // Utility data structures - function ContextCache() {} - ContextCache.prototype = { - getContexts: function(id) { - if (id in this) { - return this[id]; - } - return (this[id] = new Int8Array(1 << 16)); +var WebGLUtils = (function WebGLUtilsClosure() { + function loadShader(gl, code, shaderType) { + var shader = gl.createShader(shaderType); + gl.shaderSource(shader, code); + gl.compileShader(shader); + var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); + if (!compiled) { + var errorMsg = gl.getShaderInfoLog(shader); + throw new Error('Error during shader compilation: ' + errorMsg); } - }; + return shader; + } + function createVertexShader(gl, code) { + return loadShader(gl, code, gl.VERTEX_SHADER); + } + function createFragmentShader(gl, code) { + return loadShader(gl, code, gl.FRAGMENT_SHADER); + } + function createProgram(gl, shaders) { + var program = gl.createProgram(); + for (var i = 0, ii = shaders.length; i < ii; ++i) { + gl.attachShader(program, shaders[i]); + } + gl.linkProgram(program); + var linked = gl.getProgramParameter(program, gl.LINK_STATUS); + if (!linked) { + var errorMsg = gl.getProgramInfoLog(program); + throw new Error('Error during program linking: ' + errorMsg); + } + return program; + } + function createTexture(gl, image, textureId) { + gl.activeTexture(textureId); + var texture = gl.createTexture(); + gl.bindTexture(gl.TEXTURE_2D, texture); - function DecodingContext(data, start, end) { - this.data = data; - this.start = start; - this.end = end; + // Set the parameters so we can render any size image. + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); + + // Upload the image into the texture. + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); + return texture; } - DecodingContext.prototype = { - get decoder() { - var decoder = new ArithmeticDecoder(this.data, this.start, this.end); - return shadow(this, 'decoder', decoder); - }, - get contextCache() { - var cache = new ContextCache(); - return shadow(this, 'contextCache', cache); + var currentGL, currentCanvas; + function generateGL() { + if (currentGL) { + return; } - }; + currentCanvas = document.createElement('canvas'); + currentGL = currentCanvas.getContext('webgl', + { premultipliedalpha: false }); + } - // Annex A. Arithmetic Integer Decoding Procedure - // A.2 Procedure for decoding values - function decodeInteger(contextCache, procedure, decoder) { - var contexts = contextCache.getContexts(procedure); - var prev = 1; + var smaskVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec2 a_texCoord; \ + \ + uniform vec2 u_resolution; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_texCoord = a_texCoord; \ + } '; - function readBits(length) { - var v = 0; - for (var i = 0; i < length; i++) { - var bit = decoder.readBit(contexts, prev); - prev = (prev < 256 ? (prev << 1) | bit : - (((prev << 1) | bit) & 511) | 256); - v = (v << 1) | bit; - } - return v >>> 0; - } + var smaskFragmentShaderCode = '\ + precision mediump float; \ + \ + uniform vec4 u_backdrop; \ + uniform int u_subtype; \ + uniform sampler2D u_image; \ + uniform sampler2D u_mask; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec4 imageColor = texture2D(u_image, v_texCoord); \ + vec4 maskColor = texture2D(u_mask, v_texCoord); \ + if (u_backdrop.a > 0.0) { \ + maskColor.rgb = maskColor.rgb * maskColor.a + \ + u_backdrop.rgb * (1.0 - maskColor.a); \ + } \ + float lum; \ + if (u_subtype == 0) { \ + lum = maskColor.a; \ + } else { \ + lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ + maskColor.b * 0.11; \ + } \ + imageColor.a *= lum; \ + imageColor.rgb *= imageColor.a; \ + gl_FragColor = imageColor; \ + } '; - var sign = readBits(1); - var value = readBits(1) ? - (readBits(1) ? - (readBits(1) ? - (readBits(1) ? - (readBits(1) ? - (readBits(32) + 4436) : - readBits(12) + 340) : - readBits(8) + 84) : - readBits(6) + 20) : - readBits(4) + 4) : - readBits(2); - return (sign === 0 ? value : (value > 0 ? -value : null)); - } + var smaskCache = null; + + function initSmaskGL() { + var canvas, gl; + + generateGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; + + // setup a GLSL program + var vertexShader = createVertexShader(gl, smaskVertexShaderCode); + var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); + + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); + cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); + + var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); + var texLayerLocation = gl.getUniformLocation(program, 'u_image'); + var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); + + // provide texture coordinates for the rectangle. + var texCoordBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0.0, 0.0, + 1.0, 0.0, + 0.0, 1.0, + 0.0, 1.0, + 1.0, 0.0, + 1.0, 1.0]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(texCoordLocation); + gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); - // A.3 The IAID decoding procedure - function decodeIAID(contextCache, decoder, codeLength) { - var contexts = contextCache.getContexts('IAID'); + gl.uniform1i(texLayerLocation, 0); + gl.uniform1i(texMaskLocation, 1); - var prev = 1; - for (var i = 0; i < codeLength; i++) { - var bit = decoder.readBit(contexts, prev); - prev = (prev << 1) | bit; - } - if (codeLength < 31) { - return prev & ((1 << codeLength) - 1); - } - return prev & 0x7FFFFFFF; + smaskCache = cache; } - // 7.3 Segment types - var SegmentTypes = [ - 'SymbolDictionary', null, null, null, 'IntermediateTextRegion', null, - 'ImmediateTextRegion', 'ImmediateLosslessTextRegion', null, null, null, - null, null, null, null, null, 'patternDictionary', null, null, null, - 'IntermediateHalftoneRegion', null, 'ImmediateHalftoneRegion', - 'ImmediateLosslessHalftoneRegion', null, null, null, null, null, null, null, - null, null, null, null, null, 'IntermediateGenericRegion', null, - 'ImmediateGenericRegion', 'ImmediateLosslessGenericRegion', - 'IntermediateGenericRefinementRegion', null, - 'ImmediateGenericRefinementRegion', - 'ImmediateLosslessGenericRefinementRegion', null, null, null, null, - 'PageInformation', 'EndOfPage', 'EndOfStripe', 'EndOfFile', 'Profiles', - 'Tables', null, null, null, null, null, null, null, null, - 'Extension' - ]; - - var CodingTemplates = [ - [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: -2, y: -1}, - {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: 2, y: -1}, - {x: -4, y: 0}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}], - [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: 2, y: -2}, - {x: -2, y: -1}, {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, - {x: 2, y: -1}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}], - [{x: -1, y: -2}, {x: 0, y: -2}, {x: 1, y: -2}, {x: -2, y: -1}, - {x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: -2, y: 0}, - {x: -1, y: 0}], - [{x: -3, y: -1}, {x: -2, y: -1}, {x: -1, y: -1}, {x: 0, y: -1}, - {x: 1, y: -1}, {x: -4, y: 0}, {x: -3, y: 0}, {x: -2, y: 0}, {x: -1, y: 0}] - ]; + function composeSMask(layer, mask, properties) { + var width = layer.width, height = layer.height; - var RefinementTemplates = [ - { - coding: [{x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}], - reference: [{x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}, {x: 0, y: 0}, - {x: 1, y: 0}, {x: -1, y: 1}, {x: 0, y: 1}, {x: 1, y: 1}] - }, - { - coding: [{x: -1, y: -1}, {x: 0, y: -1}, {x: 1, y: -1}, {x: -1, y: 0}], - reference: [{x: 0, y: -1}, {x: -1, y: 0}, {x: 0, y: 0}, {x: 1, y: 0}, - {x: 0, y: 1}, {x: 1, y: 1}] + if (!smaskCache) { + initSmaskGL(); } - ]; + var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); - // See 6.2.5.7 Decoding the bitmap. - var ReusedContexts = [ - 0x9B25, // 10011 0110010 0101 - 0x0795, // 0011 110010 101 - 0x00E5, // 001 11001 01 - 0x0195 // 011001 0101 - ]; + if (properties.backdrop) { + gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], + properties.backdrop[1], properties.backdrop[2], 1); + } else { + gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); + } + gl.uniform1i(cache.subtypeLocation, + properties.subtype === 'Luminosity' ? 1 : 0); - var RefinementReusedContexts = [ - 0x0020, // '000' + '0' (coding) + '00010000' + '0' (reference) - 0x0008 // '0000' + '001000' - ]; + // Create a textures + var texture = createTexture(gl, layer, gl.TEXTURE0); + var maskTexture = createTexture(gl, mask, gl.TEXTURE1); - function decodeBitmapTemplate0(width, height, decodingContext) { - var decoder = decodingContext.decoder; - var contexts = decodingContext.contextCache.getContexts('GB'); - var contextLabel, i, j, pixel, row, row1, row2, bitmap = []; - // ...ooooo.... - // ..ooooooo... Context template for current pixel (X) - // .ooooX...... (concatenate values of 'o'-pixels to get contextLabel) - var OLD_PIXEL_MASK = 0x7BF7; // 01111 0111111 0111 + // Create a buffer and put a single clipspace rectangle in + // it (2 triangles) + var buffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, buffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0, 0, + width, 0, + 0, height, + 0, height, + width, 0, + width, height]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - for (i = 0; i < height; i++) { - row = bitmap[i] = new Uint8Array(width); - row1 = (i < 1) ? row : bitmap[i - 1]; - row2 = (i < 2) ? row : bitmap[i - 2]; + // draw + gl.clearColor(0, 0, 0, 0); + gl.enable(gl.BLEND); + gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); + gl.clear(gl.COLOR_BUFFER_BIT); - // At the beginning of each row: - // Fill contextLabel with pixels that are above/right of (X) - contextLabel = (row2[0] << 13) | (row2[1] << 12) | (row2[2] << 11) | - (row1[0] << 7) | (row1[1] << 6) | (row1[2] << 5) | - (row1[3] << 4); + gl.drawArrays(gl.TRIANGLES, 0, 6); - for (j = 0; j < width; j++) { - row[j] = pixel = decoder.readBit(contexts, contextLabel); + gl.flush(); - // At each pixel: Clear contextLabel pixels that are shifted - // out of the context, then add new ones. - contextLabel = ((contextLabel & OLD_PIXEL_MASK) << 1) | - (j + 3 < width ? row2[j + 3] << 11 : 0) | - (j + 4 < width ? row1[j + 4] << 4 : 0) | pixel; - } - } + gl.deleteTexture(texture); + gl.deleteTexture(maskTexture); + gl.deleteBuffer(buffer); - return bitmap; + return canvas; } - // 6.2 Generic Region Decoding Procedure - function decodeBitmap(mmr, width, height, templateIndex, prediction, skip, at, - decodingContext) { - if (mmr) { - error('JBIG2 error: MMR encoding is not supported'); - } + var figuresVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec3 a_color; \ + \ + uniform vec2 u_resolution; \ + uniform vec2 u_scale; \ + uniform vec2 u_offset; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + vec2 position = (a_position + u_offset) * u_scale; \ + vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_color = vec4(a_color / 255.0, 1.0); \ + } '; - // Use optimized version for the most common case - if (templateIndex === 0 && !skip && !prediction && at.length === 4 && - at[0].x === 3 && at[0].y === -1 && at[1].x === -3 && at[1].y === -1 && - at[2].x === 2 && at[2].y === -2 && at[3].x === -2 && at[3].y === -2) { - return decodeBitmapTemplate0(width, height, decodingContext); - } + var figuresFragmentShaderCode = '\ + precision mediump float; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + gl_FragColor = v_color; \ + } '; - var useskip = !!skip; - var template = CodingTemplates[templateIndex].concat(at); + var figuresCache = null; - // Sorting is non-standard, and it is not required. But sorting increases - // the number of template bits that can be reused from the previous - // contextLabel in the main loop. - template.sort(function (a, b) { - return (a.y - b.y) || (a.x - b.x); - }); + function initFiguresGL() { + var canvas, gl; - var templateLength = template.length; - var templateX = new Int8Array(templateLength); - var templateY = new Int8Array(templateLength); - var changingTemplateEntries = []; - var reuseMask = 0, minX = 0, maxX = 0, minY = 0; - var c, k; + generateGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; - for (k = 0; k < templateLength; k++) { - templateX[k] = template[k].x; - templateY[k] = template[k].y; - minX = Math.min(minX, template[k].x); - maxX = Math.max(maxX, template[k].x); - minY = Math.min(minY, template[k].y); - // Check if the template pixel appears in two consecutive context labels, - // so it can be reused. Otherwise, we add it to the list of changing - // template entries. - if (k < templateLength - 1 && - template[k].y === template[k + 1].y && - template[k].x === template[k + 1].x - 1) { - reuseMask |= 1 << (templateLength - 1 - k); - } else { - changingTemplateEntries.push(k); - } - } - var changingEntriesLength = changingTemplateEntries.length; + // setup a GLSL program + var vertexShader = createVertexShader(gl, figuresVertexShaderCode); + var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); - var changingTemplateX = new Int8Array(changingEntriesLength); - var changingTemplateY = new Int8Array(changingEntriesLength); - var changingTemplateBit = new Uint16Array(changingEntriesLength); - for (c = 0; c < changingEntriesLength; c++) { - k = changingTemplateEntries[c]; - changingTemplateX[c] = template[k].x; - changingTemplateY[c] = template[k].y; - changingTemplateBit[c] = 1 << (templateLength - 1 - k); - } + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); + cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.colorLocation = gl.getAttribLocation(program, 'a_color'); - // Get the safe bounding box edges from the width, height, minX, maxX, minY - var sbb_left = -minX; - var sbb_top = -minY; - var sbb_right = width - maxX; + figuresCache = cache; + } - var pseudoPixelContext = ReusedContexts[templateIndex]; - var row = new Uint8Array(width); - var bitmap = []; + function drawFigures(width, height, backgroundColor, figures, context) { + if (!figuresCache) { + initFiguresGL(); + } + var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; - var decoder = decodingContext.decoder; - var contexts = decodingContext.contextCache.getContexts('GB'); + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); - var ltp = 0, j, i0, j0, contextLabel = 0, bit, shift; - for (var i = 0; i < height; i++) { - if (prediction) { - var sltp = decoder.readBit(contexts, pseudoPixelContext); - ltp ^= sltp; - if (ltp) { - bitmap.push(row); // duplicate previous row - continue; - } + // count triangle points + var count = 0; + var i, ii, rows; + for (i = 0, ii = figures.length; i < ii; i++) { + switch (figures[i].type) { + case 'lattice': + rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; + count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; + break; + case 'triangles': + count += figures[i].coords.length; + break; } - row = new Uint8Array(row); - bitmap.push(row); - for (j = 0; j < width; j++) { - if (useskip && skip[i][j]) { - row[j] = 0; - continue; - } - // Are we in the middle of a scanline, so we can reuse contextLabel - // bits? - if (j >= sbb_left && j < sbb_right && i >= sbb_top) { - // If yes, we can just shift the bits that are reusable and only - // fetch the remaining ones. - contextLabel = (contextLabel << 1) & reuseMask; - for (k = 0; k < changingEntriesLength; k++) { - i0 = i + changingTemplateY[k]; - j0 = j + changingTemplateX[k]; - bit = bitmap[i0][j0]; - if (bit) { - bit = changingTemplateBit[k]; - contextLabel |= bit; + } + // transfer data + var coords = new Float32Array(count * 2); + var colors = new Uint8Array(count * 3); + var coordsMap = context.coords, colorsMap = context.colors; + var pIndex = 0, cIndex = 0; + for (i = 0, ii = figures.length; i < ii; i++) { + var figure = figures[i], ps = figure.coords, cs = figure.colors; + switch (figure.type) { + case 'lattice': + var cols = figure.verticesPerRow; + rows = (ps.length / cols) | 0; + for (var row = 1; row < rows; row++) { + var offset = row * cols + 1; + for (var col = 1; col < cols; col++, offset++) { + coords[pIndex] = coordsMap[ps[offset - cols - 1]]; + coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; + coords[pIndex + 2] = coordsMap[ps[offset - cols]]; + coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; + coords[pIndex + 4] = coordsMap[ps[offset - 1]]; + coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; + colors[cIndex] = colorsMap[cs[offset - cols - 1]]; + colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; + colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; + colors[cIndex + 3] = colorsMap[cs[offset - cols]]; + colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; + colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; + colors[cIndex + 6] = colorsMap[cs[offset - 1]]; + colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; + colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; + + coords[pIndex + 6] = coords[pIndex + 2]; + coords[pIndex + 7] = coords[pIndex + 3]; + coords[pIndex + 8] = coords[pIndex + 4]; + coords[pIndex + 9] = coords[pIndex + 5]; + coords[pIndex + 10] = coordsMap[ps[offset]]; + coords[pIndex + 11] = coordsMap[ps[offset] + 1]; + colors[cIndex + 9] = colors[cIndex + 3]; + colors[cIndex + 10] = colors[cIndex + 4]; + colors[cIndex + 11] = colors[cIndex + 5]; + colors[cIndex + 12] = colors[cIndex + 6]; + colors[cIndex + 13] = colors[cIndex + 7]; + colors[cIndex + 14] = colors[cIndex + 8]; + colors[cIndex + 15] = colorsMap[cs[offset]]; + colors[cIndex + 16] = colorsMap[cs[offset] + 1]; + colors[cIndex + 17] = colorsMap[cs[offset] + 2]; + pIndex += 12; + cIndex += 18; } } - } else { - // compute the contextLabel from scratch - contextLabel = 0; - shift = templateLength - 1; - for (k = 0; k < templateLength; k++, shift--) { - j0 = j + templateX[k]; - if (j0 >= 0 && j0 < width) { - i0 = i + templateY[k]; - if (i0 >= 0) { - bit = bitmap[i0][j0]; - if (bit) { - contextLabel |= bit << shift; - } - } - } + break; + case 'triangles': + for (var j = 0, jj = ps.length; j < jj; j++) { + coords[pIndex] = coordsMap[ps[j]]; + coords[pIndex + 1] = coordsMap[ps[j] + 1]; + colors[cIndex] = colorsMap[cs[j]]; + colors[cIndex + 1] = colorsMap[cs[j] + 1]; + colors[cIndex + 2] = colorsMap[cs[j] + 2]; + pIndex += 2; + cIndex += 3; } - } - var pixel = decoder.readBit(contexts, contextLabel); - row[j] = pixel; + break; } } - return bitmap; - } - // 6.3.2 Generic Refinement Region Decoding Procedure - function decodeRefinement(width, height, templateIndex, referenceBitmap, - offsetX, offsetY, prediction, at, - decodingContext) { - var codingTemplate = RefinementTemplates[templateIndex].coding; - if (templateIndex === 0) { - codingTemplate = codingTemplate.concat([at[0]]); - } - var codingTemplateLength = codingTemplate.length; - var codingTemplateX = new Int32Array(codingTemplateLength); - var codingTemplateY = new Int32Array(codingTemplateLength); - var k; - for (k = 0; k < codingTemplateLength; k++) { - codingTemplateX[k] = codingTemplate[k].x; - codingTemplateY[k] = codingTemplate[k].y; + // draw + if (backgroundColor) { + gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, + backgroundColor[2] / 255, 1.0); + } else { + gl.clearColor(0, 0, 0, 0); } + gl.clear(gl.COLOR_BUFFER_BIT); - var referenceTemplate = RefinementTemplates[templateIndex].reference; - if (templateIndex === 0) { - referenceTemplate = referenceTemplate.concat([at[1]]); - } - var referenceTemplateLength = referenceTemplate.length; - var referenceTemplateX = new Int32Array(referenceTemplateLength); - var referenceTemplateY = new Int32Array(referenceTemplateLength); - for (k = 0; k < referenceTemplateLength; k++) { - referenceTemplateX[k] = referenceTemplate[k].x; - referenceTemplateY[k] = referenceTemplate[k].y; - } - var referenceWidth = referenceBitmap[0].length; - var referenceHeight = referenceBitmap.length; + var coordsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - var pseudoPixelContext = RefinementReusedContexts[templateIndex]; - var bitmap = []; + var colorsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.colorLocation); + gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, + 0, 0); - var decoder = decodingContext.decoder; - var contexts = decodingContext.contextCache.getContexts('GR'); + gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); + gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); - var ltp = 0; - for (var i = 0; i < height; i++) { - if (prediction) { - var sltp = decoder.readBit(contexts, pseudoPixelContext); - ltp ^= sltp; - if (ltp) { - error('JBIG2 error: prediction is not supported'); - } - } - var row = new Uint8Array(width); - bitmap.push(row); - for (var j = 0; j < width; j++) { - var i0, j0; - var contextLabel = 0; - for (k = 0; k < codingTemplateLength; k++) { - i0 = i + codingTemplateY[k]; - j0 = j + codingTemplateX[k]; - if (i0 < 0 || j0 < 0 || j0 >= width) { - contextLabel <<= 1; // out of bound pixel - } else { - contextLabel = (contextLabel << 1) | bitmap[i0][j0]; - } - } - for (k = 0; k < referenceTemplateLength; k++) { - i0 = i + referenceTemplateY[k] + offsetY; - j0 = j + referenceTemplateX[k] + offsetX; - if (i0 < 0 || i0 >= referenceHeight || j0 < 0 || - j0 >= referenceWidth) { - contextLabel <<= 1; // out of bound pixel - } else { - contextLabel = (contextLabel << 1) | referenceBitmap[i0][j0]; - } - } - var pixel = decoder.readBit(contexts, contextLabel); - row[j] = pixel; - } + gl.drawArrays(gl.TRIANGLES, 0, count); + + gl.flush(); + + gl.deleteBuffer(coordsBuffer); + gl.deleteBuffer(colorsBuffer); + + return canvas; + } + + function cleanup() { + if (smaskCache && smaskCache.canvas) { + smaskCache.canvas.width = 0; + smaskCache.canvas.height = 0; + } + if (figuresCache && figuresCache.canvas) { + figuresCache.canvas.width = 0; + figuresCache.canvas.height = 0; } + smaskCache = null; + figuresCache = null; + } + + return { + get isEnabled() { + if (PDFJS.disableWebGL) { + return false; + } + var enabled = false; + try { + generateGL(); + enabled = !!currentGL; + } catch (e) { } + return shadow(this, 'isEnabled', enabled); + }, + composeSMask: composeSMask, + drawFigures: drawFigures, + clear: cleanup + }; +})(); - return bitmap; +exports.WebGLUtils = WebGLUtils; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreStream = {}), root.pdfjsSharedUtil, + root.pdfjsCorePrimitives, root.pdfjsCoreJbig2, root.pdfjsCoreJpg, + root.pdfjsCoreJpx); } +}(this, function (exports, sharedUtil, corePrimitives, coreJbig2, coreJpg, + coreJpx) { - // 6.5.5 Decoding the symbol dictionary - function decodeSymbolDictionary(huffman, refinement, symbols, - numberOfNewSymbols, numberOfExportedSymbols, - huffmanTables, templateIndex, at, - refinementTemplateIndex, refinementAt, - decodingContext) { - if (huffman) { - error('JBIG2 error: huffman is not supported'); - } +var Util = sharedUtil.Util; +var error = sharedUtil.error; +var info = sharedUtil.info; +var isArray = sharedUtil.isArray; +var shadow = sharedUtil.shadow; +var warn = sharedUtil.warn; +var Dict = corePrimitives.Dict; +var Jbig2Image = coreJbig2.Jbig2Image; +var JpegImage = coreJpg.JpegImage; +var JpxImage = coreJpx.JpxImage; - var newSymbols = []; - var currentHeight = 0; - var symbolCodeLength = log2(symbols.length + numberOfNewSymbols); +var coreParser; // see _setCoreParser below +var EOF; // = coreParser.EOF; +var Lexer; // = coreParser.Lexer; - var decoder = decodingContext.decoder; - var contextCache = decodingContext.contextCache; +var coreColorSpace; // see _setCoreColorSpace below +var ColorSpace; // = coreColorSpace.ColorSpace; - while (newSymbols.length < numberOfNewSymbols) { - var deltaHeight = decodeInteger(contextCache, 'IADH', decoder); // 6.5.6 - currentHeight += deltaHeight; - var currentWidth = 0; - var totalWidth = 0; - while (true) { - var deltaWidth = decodeInteger(contextCache, 'IADW', decoder); // 6.5.7 - if (deltaWidth === null) { - break; // OOB - } - currentWidth += deltaWidth; - totalWidth += currentWidth; - var bitmap; - if (refinement) { - // 6.5.8.2 Refinement/aggregate-coded symbol bitmap - var numberOfInstances = decodeInteger(contextCache, 'IAAI', decoder); - if (numberOfInstances > 1) { - bitmap = decodeTextRegion(huffman, refinement, - currentWidth, currentHeight, 0, - numberOfInstances, 1, //strip size - symbols.concat(newSymbols), - symbolCodeLength, - 0, //transposed - 0, //ds offset - 1, //top left 7.4.3.1.1 - 0, //OR operator - huffmanTables, - refinementTemplateIndex, refinementAt, - decodingContext); - } else { - var symbolId = decodeIAID(contextCache, decoder, symbolCodeLength); - var rdx = decodeInteger(contextCache, 'IARDX', decoder); // 6.4.11.3 - var rdy = decodeInteger(contextCache, 'IARDY', decoder); // 6.4.11.4 - var symbol = (symbolId < symbols.length ? symbols[symbolId] : - newSymbols[symbolId - symbols.length]); - bitmap = decodeRefinement(currentWidth, currentHeight, - refinementTemplateIndex, symbol, rdx, rdy, false, refinementAt, - decodingContext); - } - } else { - // 6.5.8.1 Direct-coded symbol bitmap - bitmap = decodeBitmap(false, currentWidth, currentHeight, - templateIndex, false, null, at, decodingContext); - } - newSymbols.push(bitmap); +var Stream = (function StreamClosure() { + function Stream(arrayBuffer, start, length, dict) { + this.bytes = (arrayBuffer instanceof Uint8Array ? + arrayBuffer : new Uint8Array(arrayBuffer)); + this.start = start || 0; + this.pos = this.start; + this.end = (start + length) || this.bytes.length; + this.dict = dict; + } + + // required methods for a stream. if a particular stream does not + // implement these, an error should be thrown + Stream.prototype = { + get length() { + return this.end - this.start; + }, + get isEmpty() { + return this.length === 0; + }, + getByte: function Stream_getByte() { + if (this.pos >= this.end) { + return -1; } - } - // 6.5.10 Exported symbols - var exportedSymbols = []; - var flags = [], currentFlag = false; - var totalSymbolsLength = symbols.length + numberOfNewSymbols; - while (flags.length < totalSymbolsLength) { - var runLength = decodeInteger(contextCache, 'IAEX', decoder); - while (runLength--) { - flags.push(currentFlag); + return this.bytes[this.pos++]; + }, + getUint16: function Stream_getUint16() { + var b0 = this.getByte(); + var b1 = this.getByte(); + if (b0 === -1 || b1 === -1) { + return -1; } - currentFlag = !currentFlag; - } - for (var i = 0, ii = symbols.length; i < ii; i++) { - if (flags[i]) { - exportedSymbols.push(symbols[i]); + return (b0 << 8) + b1; + }, + getInt32: function Stream_getInt32() { + var b0 = this.getByte(); + var b1 = this.getByte(); + var b2 = this.getByte(); + var b3 = this.getByte(); + return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + }, + // returns subarray of original buffer + // should only be read + getBytes: function Stream_getBytes(length) { + var bytes = this.bytes; + var pos = this.pos; + var strEnd = this.end; + + if (!length) { + return bytes.subarray(pos, strEnd); } - } - for (var j = 0; j < numberOfNewSymbols; i++, j++) { - if (flags[i]) { - exportedSymbols.push(newSymbols[j]); + var end = pos + length; + if (end > strEnd) { + end = strEnd; + } + this.pos = end; + return bytes.subarray(pos, end); + }, + peekByte: function Stream_peekByte() { + var peekedByte = this.getByte(); + this.pos--; + return peekedByte; + }, + peekBytes: function Stream_peekBytes(length) { + var bytes = this.getBytes(length); + this.pos -= bytes.length; + return bytes; + }, + skip: function Stream_skip(n) { + if (!n) { + n = 1; } + this.pos += n; + }, + reset: function Stream_reset() { + this.pos = this.start; + }, + moveStart: function Stream_moveStart() { + this.start = this.pos; + }, + makeSubStream: function Stream_makeSubStream(start, length, dict) { + return new Stream(this.bytes.buffer, start, length, dict); + }, + isStream: true + }; + + return Stream; +})(); + +var StringStream = (function StringStreamClosure() { + function StringStream(str) { + var length = str.length; + var bytes = new Uint8Array(length); + for (var n = 0; n < length; ++n) { + bytes[n] = str.charCodeAt(n); } - return exportedSymbols; + Stream.call(this, bytes); } - function decodeTextRegion(huffman, refinement, width, height, - defaultPixelValue, numberOfSymbolInstances, - stripSize, inputSymbols, symbolCodeLength, - transposed, dsOffset, referenceCorner, - combinationOperator, huffmanTables, - refinementTemplateIndex, refinementAt, - decodingContext) { - if (huffman) { - error('JBIG2 error: huffman is not supported'); - } + StringStream.prototype = Stream.prototype; - // Prepare bitmap - var bitmap = []; - var i, row; - for (i = 0; i < height; i++) { - row = new Uint8Array(width); - if (defaultPixelValue) { - for (var j = 0; j < width; j++) { - row[j] = defaultPixelValue; - } - } - bitmap.push(row); - } + return StringStream; +})(); - var decoder = decodingContext.decoder; - var contextCache = decodingContext.contextCache; - var stripT = -decodeInteger(contextCache, 'IADT', decoder); // 6.4.6 - var firstS = 0; - i = 0; - while (i < numberOfSymbolInstances) { - var deltaT = decodeInteger(contextCache, 'IADT', decoder); // 6.4.6 - stripT += deltaT; +// super class for the decoding streams +var DecodeStream = (function DecodeStreamClosure() { + // Lots of DecodeStreams are created whose buffers are never used. For these + // we share a single empty buffer. This is (a) space-efficient and (b) avoids + // having special cases that would be required if we used |null| for an empty + // buffer. + var emptyBuffer = new Uint8Array(0); - var deltaFirstS = decodeInteger(contextCache, 'IAFS', decoder); // 6.4.7 - firstS += deltaFirstS; - var currentS = firstS; - do { - var currentT = (stripSize === 1 ? 0 : - decodeInteger(contextCache, 'IAIT', decoder)); // 6.4.9 - var t = stripSize * stripT + currentT; - var symbolId = decodeIAID(contextCache, decoder, symbolCodeLength); - var applyRefinement = (refinement && - decodeInteger(contextCache, 'IARI', decoder)); - var symbolBitmap = inputSymbols[symbolId]; - var symbolWidth = symbolBitmap[0].length; - var symbolHeight = symbolBitmap.length; - if (applyRefinement) { - var rdw = decodeInteger(contextCache, 'IARDW', decoder); // 6.4.11.1 - var rdh = decodeInteger(contextCache, 'IARDH', decoder); // 6.4.11.2 - var rdx = decodeInteger(contextCache, 'IARDX', decoder); // 6.4.11.3 - var rdy = decodeInteger(contextCache, 'IARDY', decoder); // 6.4.11.4 - symbolWidth += rdw; - symbolHeight += rdh; - symbolBitmap = decodeRefinement(symbolWidth, symbolHeight, - refinementTemplateIndex, symbolBitmap, (rdw >> 1) + rdx, - (rdh >> 1) + rdy, false, refinementAt, - decodingContext); - } - var offsetT = t - ((referenceCorner & 1) ? 0 : symbolHeight); - var offsetS = currentS - ((referenceCorner & 2) ? symbolWidth : 0); - var s2, t2, symbolRow; - if (transposed) { - // Place Symbol Bitmap from T1,S1 - for (s2 = 0; s2 < symbolHeight; s2++) { - row = bitmap[offsetS + s2]; - if (!row) { - continue; - } - symbolRow = symbolBitmap[s2]; - // To ignore Parts of Symbol bitmap which goes - // outside bitmap region - var maxWidth = Math.min(width - offsetT, symbolWidth); - switch (combinationOperator) { - case 0: // OR - for (t2 = 0; t2 < maxWidth; t2++) { - row[offsetT + t2] |= symbolRow[t2]; - } - break; - case 2: // XOR - for (t2 = 0; t2 < maxWidth; t2++) { - row[offsetT + t2] ^= symbolRow[t2]; - } - break; - default: - error('JBIG2 error: operator ' + combinationOperator + - ' is not supported'); - } - } - currentS += symbolHeight - 1; - } else { - for (t2 = 0; t2 < symbolHeight; t2++) { - row = bitmap[offsetT + t2]; - if (!row) { - continue; - } - symbolRow = symbolBitmap[t2]; - switch (combinationOperator) { - case 0: // OR - for (s2 = 0; s2 < symbolWidth; s2++) { - row[offsetS + s2] |= symbolRow[s2]; - } - break; - case 2: // XOR - for (s2 = 0; s2 < symbolWidth; s2++) { - row[offsetS + s2] ^= symbolRow[s2]; - } - break; - default: - error('JBIG2 error: operator ' + combinationOperator + - ' is not supported'); - } - } - currentS += symbolWidth - 1; - } - i++; - var deltaS = decodeInteger(contextCache, 'IADS', decoder); // 6.4.8 - if (deltaS === null) { - break; // OOB - } - currentS += deltaS + dsOffset; - } while (true); + function DecodeStream(maybeMinBufferLength) { + this.pos = 0; + this.bufferLength = 0; + this.eof = false; + this.buffer = emptyBuffer; + this.minBufferLength = 512; + if (maybeMinBufferLength) { + // Compute the first power of two that is as big as maybeMinBufferLength. + while (this.minBufferLength < maybeMinBufferLength) { + this.minBufferLength *= 2; + } } - return bitmap; } - function readSegmentHeader(data, start) { - var segmentHeader = {}; - segmentHeader.number = readUint32(data, start); - var flags = data[start + 4]; - var segmentType = flags & 0x3F; - if (!SegmentTypes[segmentType]) { - error('JBIG2 error: invalid segment type: ' + segmentType); - } - segmentHeader.type = segmentType; - segmentHeader.typeName = SegmentTypes[segmentType]; - segmentHeader.deferredNonRetain = !!(flags & 0x80); - - var pageAssociationFieldSize = !!(flags & 0x40); - var referredFlags = data[start + 5]; - var referredToCount = (referredFlags >> 5) & 7; - var retainBits = [referredFlags & 31]; - var position = start + 6; - if (referredFlags === 7) { - referredToCount = readUint32(data, position - 1) & 0x1FFFFFFF; - position += 3; - var bytes = (referredToCount + 7) >> 3; - retainBits[0] = data[position++]; - while (--bytes > 0) { - retainBits.push(data[position++]); + DecodeStream.prototype = { + get isEmpty() { + while (!this.eof && this.bufferLength === 0) { + this.readBlock(); } - } else if (referredFlags === 5 || referredFlags === 6) { - error('JBIG2 error: invalid referred-to flags'); - } + return this.bufferLength === 0; + }, + ensureBuffer: function DecodeStream_ensureBuffer(requested) { + var buffer = this.buffer; + if (requested <= buffer.byteLength) { + return buffer; + } + var size = this.minBufferLength; + while (size < requested) { + size *= 2; + } + var buffer2 = new Uint8Array(size); + buffer2.set(buffer); + return (this.buffer = buffer2); + }, + getByte: function DecodeStream_getByte() { + var pos = this.pos; + while (this.bufferLength <= pos) { + if (this.eof) { + return -1; + } + this.readBlock(); + } + return this.buffer[this.pos++]; + }, + getUint16: function DecodeStream_getUint16() { + var b0 = this.getByte(); + var b1 = this.getByte(); + if (b0 === -1 || b1 === -1) { + return -1; + } + return (b0 << 8) + b1; + }, + getInt32: function DecodeStream_getInt32() { + var b0 = this.getByte(); + var b1 = this.getByte(); + var b2 = this.getByte(); + var b3 = this.getByte(); + return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; + }, + getBytes: function DecodeStream_getBytes(length) { + var end, pos = this.pos; - segmentHeader.retainBits = retainBits; - var referredToSegmentNumberSize = (segmentHeader.number <= 256 ? 1 : - (segmentHeader.number <= 65536 ? 2 : 4)); - var referredTo = []; - var i, ii; - for (i = 0; i < referredToCount; i++) { - var number = (referredToSegmentNumberSize === 1 ? data[position] : - (referredToSegmentNumberSize === 2 ? readUint16(data, position) : - readUint32(data, position))); - referredTo.push(number); - position += referredToSegmentNumberSize; - } - segmentHeader.referredTo = referredTo; - if (!pageAssociationFieldSize) { - segmentHeader.pageAssociation = data[position++]; - } else { - segmentHeader.pageAssociation = readUint32(data, position); - position += 4; - } - segmentHeader.length = readUint32(data, position); - position += 4; + if (length) { + this.ensureBuffer(pos + length); + end = pos + length; - if (segmentHeader.length === 0xFFFFFFFF) { - // 7.2.7 Segment data length, unknown segment length - if (segmentType === 38) { // ImmediateGenericRegion - var genericRegionInfo = readRegionSegmentInformation(data, position); - var genericRegionSegmentFlags = data[position + - RegionSegmentInformationFieldLength]; - var genericRegionMmr = !!(genericRegionSegmentFlags & 1); - // searching for the segment end - var searchPatternLength = 6; - var searchPattern = new Uint8Array(searchPatternLength); - if (!genericRegionMmr) { - searchPattern[0] = 0xFF; - searchPattern[1] = 0xAC; - } - searchPattern[2] = (genericRegionInfo.height >>> 24) & 0xFF; - searchPattern[3] = (genericRegionInfo.height >> 16) & 0xFF; - searchPattern[4] = (genericRegionInfo.height >> 8) & 0xFF; - searchPattern[5] = genericRegionInfo.height & 0xFF; - for (i = position, ii = data.length; i < ii; i++) { - var j = 0; - while (j < searchPatternLength && searchPattern[j] === data[i + j]) { - j++; - } - if (j === searchPatternLength) { - segmentHeader.length = i + searchPatternLength; - break; - } + while (!this.eof && this.bufferLength < end) { + this.readBlock(); } - if (segmentHeader.length === 0xFFFFFFFF) { - error('JBIG2 error: segment end was not found'); + var bufEnd = this.bufferLength; + if (end > bufEnd) { + end = bufEnd; } } else { - error('JBIG2 error: invalid unknown segment length'); + while (!this.eof) { + this.readBlock(); + } + end = this.bufferLength; } - } - segmentHeader.headerEnd = position; - return segmentHeader; - } - function readSegments(header, data, start, end) { - var segments = []; - var position = start; - while (position < end) { - var segmentHeader = readSegmentHeader(data, position); - position = segmentHeader.headerEnd; - var segment = { - header: segmentHeader, - data: data - }; - if (!header.randomAccess) { - segment.start = position; - position += segmentHeader.length; - segment.end = position; + this.pos = end; + return this.buffer.subarray(pos, end); + }, + peekByte: function DecodeStream_peekByte() { + var peekedByte = this.getByte(); + this.pos--; + return peekedByte; + }, + peekBytes: function DecodeStream_peekBytes(length) { + var bytes = this.getBytes(length); + this.pos -= bytes.length; + return bytes; + }, + makeSubStream: function DecodeStream_makeSubStream(start, length, dict) { + var end = start + length; + while (this.bufferLength <= end && !this.eof) { + this.readBlock(); } - segments.push(segment); - if (segmentHeader.type === 51) { - break; // end of file is found + return new Stream(this.buffer, start, length, dict); + }, + skip: function DecodeStream_skip(n) { + if (!n) { + n = 1; } - } - if (header.randomAccess) { - for (var i = 0, ii = segments.length; i < ii; i++) { - segments[i].start = position; - position += segments[i].header.length; - segments[i].end = position; + this.pos += n; + }, + reset: function DecodeStream_reset() { + this.pos = 0; + }, + getBaseStreams: function DecodeStream_getBaseStreams() { + if (this.str && this.str.getBaseStreams) { + return this.str.getBaseStreams(); } + return []; } - return segments; - } + }; - // 7.4.1 Region segment information field - function readRegionSegmentInformation(data, start) { - return { - width: readUint32(data, start), - height: readUint32(data, start + 4), - x: readUint32(data, start + 8), - y: readUint32(data, start + 12), - combinationOperator: data[start + 16] & 7 - }; + return DecodeStream; +})(); + +var StreamsSequenceStream = (function StreamsSequenceStreamClosure() { + function StreamsSequenceStream(streams) { + this.streams = streams; + DecodeStream.call(this, /* maybeLength = */ null); } - var RegionSegmentInformationFieldLength = 17; - function processSegment(segment, visitor) { - var header = segment.header; + StreamsSequenceStream.prototype = Object.create(DecodeStream.prototype); - var data = segment.data, position = segment.start, end = segment.end; - var args, at, i, atLength; - switch (header.type) { - case 0: // SymbolDictionary - // 7.4.2 Symbol dictionary segment syntax - var dictionary = {}; - var dictionaryFlags = readUint16(data, position); // 7.4.2.1.1 - dictionary.huffman = !!(dictionaryFlags & 1); - dictionary.refinement = !!(dictionaryFlags & 2); - dictionary.huffmanDHSelector = (dictionaryFlags >> 2) & 3; - dictionary.huffmanDWSelector = (dictionaryFlags >> 4) & 3; - dictionary.bitmapSizeSelector = (dictionaryFlags >> 6) & 1; - dictionary.aggregationInstancesSelector = (dictionaryFlags >> 7) & 1; - dictionary.bitmapCodingContextUsed = !!(dictionaryFlags & 256); - dictionary.bitmapCodingContextRetained = !!(dictionaryFlags & 512); - dictionary.template = (dictionaryFlags >> 10) & 3; - dictionary.refinementTemplate = (dictionaryFlags >> 12) & 1; - position += 2; - if (!dictionary.huffman) { - atLength = dictionary.template === 0 ? 4 : 1; - at = []; - for (i = 0; i < atLength; i++) { - at.push({ - x: readInt8(data, position), - y: readInt8(data, position + 1) - }); - position += 2; - } - dictionary.at = at; - } - if (dictionary.refinement && !dictionary.refinementTemplate) { - at = []; - for (i = 0; i < 2; i++) { - at.push({ - x: readInt8(data, position), - y: readInt8(data, position + 1) - }); - position += 2; - } - dictionary.refinementAt = at; - } - dictionary.numberOfExportedSymbols = readUint32(data, position); - position += 4; - dictionary.numberOfNewSymbols = readUint32(data, position); - position += 4; - args = [dictionary, header.number, header.referredTo, - data, position, end]; - break; - case 6: // ImmediateTextRegion - case 7: // ImmediateLosslessTextRegion - var textRegion = {}; - textRegion.info = readRegionSegmentInformation(data, position); - position += RegionSegmentInformationFieldLength; - var textRegionSegmentFlags = readUint16(data, position); - position += 2; - textRegion.huffman = !!(textRegionSegmentFlags & 1); - textRegion.refinement = !!(textRegionSegmentFlags & 2); - textRegion.stripSize = 1 << ((textRegionSegmentFlags >> 2) & 3); - textRegion.referenceCorner = (textRegionSegmentFlags >> 4) & 3; - textRegion.transposed = !!(textRegionSegmentFlags & 64); - textRegion.combinationOperator = (textRegionSegmentFlags >> 7) & 3; - textRegion.defaultPixelValue = (textRegionSegmentFlags >> 9) & 1; - textRegion.dsOffset = (textRegionSegmentFlags << 17) >> 27; - textRegion.refinementTemplate = (textRegionSegmentFlags >> 15) & 1; - if (textRegion.huffman) { - var textRegionHuffmanFlags = readUint16(data, position); - position += 2; - textRegion.huffmanFS = (textRegionHuffmanFlags) & 3; - textRegion.huffmanDS = (textRegionHuffmanFlags >> 2) & 3; - textRegion.huffmanDT = (textRegionHuffmanFlags >> 4) & 3; - textRegion.huffmanRefinementDW = (textRegionHuffmanFlags >> 6) & 3; - textRegion.huffmanRefinementDH = (textRegionHuffmanFlags >> 8) & 3; - textRegion.huffmanRefinementDX = (textRegionHuffmanFlags >> 10) & 3; - textRegion.huffmanRefinementDY = (textRegionHuffmanFlags >> 12) & 3; - textRegion.huffmanRefinementSizeSelector = - !!(textRegionHuffmanFlags & 14); - } - if (textRegion.refinement && !textRegion.refinementTemplate) { - at = []; - for (i = 0; i < 2; i++) { - at.push({ - x: readInt8(data, position), - y: readInt8(data, position + 1) - }); - position += 2; - } - textRegion.refinementAt = at; - } - textRegion.numberOfSymbolInstances = readUint32(data, position); - position += 4; - // TODO 7.4.3.1.7 Symbol ID Huffman table decoding - if (textRegion.huffman) { - error('JBIG2 error: huffman is not supported'); - } - args = [textRegion, header.referredTo, data, position, end]; - break; - case 38: // ImmediateGenericRegion - case 39: // ImmediateLosslessGenericRegion - var genericRegion = {}; - genericRegion.info = readRegionSegmentInformation(data, position); - position += RegionSegmentInformationFieldLength; - var genericRegionSegmentFlags = data[position++]; - genericRegion.mmr = !!(genericRegionSegmentFlags & 1); - genericRegion.template = (genericRegionSegmentFlags >> 1) & 3; - genericRegion.prediction = !!(genericRegionSegmentFlags & 8); - if (!genericRegion.mmr) { - atLength = genericRegion.template === 0 ? 4 : 1; - at = []; - for (i = 0; i < atLength; i++) { - at.push({ - x: readInt8(data, position), - y: readInt8(data, position + 1) - }); - position += 2; - } - genericRegion.at = at; - } - args = [genericRegion, data, position, end]; - break; - case 48: // PageInformation - var pageInfo = { - width: readUint32(data, position), - height: readUint32(data, position + 4), - resolutionX: readUint32(data, position + 8), - resolutionY: readUint32(data, position + 12) - }; - if (pageInfo.height === 0xFFFFFFFF) { - delete pageInfo.height; - } - var pageSegmentFlags = data[position + 16]; - var pageStripingInformation = readUint16(data, position + 17); - pageInfo.lossless = !!(pageSegmentFlags & 1); - pageInfo.refinement = !!(pageSegmentFlags & 2); - pageInfo.defaultPixelValue = (pageSegmentFlags >> 2) & 1; - pageInfo.combinationOperator = (pageSegmentFlags >> 3) & 3; - pageInfo.requiresBuffer = !!(pageSegmentFlags & 32); - pageInfo.combinationOperatorOverride = !!(pageSegmentFlags & 64); - args = [pageInfo]; - break; - case 49: // EndOfPage - break; - case 50: // EndOfStripe - break; - case 51: // EndOfFile - break; - case 62: // 7.4.15 defines 2 extension types which - // are comments and can be ignored. - break; - default: - error('JBIG2 error: segment type ' + header.typeName + '(' + - header.type + ') is not implemented'); - } - var callbackName = 'on' + header.typeName; - if (callbackName in visitor) { - visitor[callbackName].apply(visitor, args); + StreamsSequenceStream.prototype.readBlock = + function streamSequenceStreamReadBlock() { + + var streams = this.streams; + if (streams.length === 0) { + this.eof = true; + return; } - } + var stream = streams.shift(); + var chunk = stream.getBytes(); + var bufferLength = this.bufferLength; + var newLength = bufferLength + chunk.length; + var buffer = this.ensureBuffer(newLength); + buffer.set(chunk, bufferLength); + this.bufferLength = newLength; + }; - function processSegments(segments, visitor) { - for (var i = 0, ii = segments.length; i < ii; i++) { - processSegment(segments[i], visitor); + StreamsSequenceStream.prototype.getBaseStreams = + function StreamsSequenceStream_getBaseStreams() { + + var baseStreams = []; + for (var i = 0, ii = this.streams.length; i < ii; i++) { + var stream = this.streams[i]; + if (stream.getBaseStreams) { + Util.appendToArray(baseStreams, stream.getBaseStreams()); + } } - } + return baseStreams; + }; - function parseJbig2(data, start, end) { - var position = start; - if (data[position] !== 0x97 || data[position + 1] !== 0x4A || - data[position + 2] !== 0x42 || data[position + 3] !== 0x32 || - data[position + 4] !== 0x0D || data[position + 5] !== 0x0A || - data[position + 6] !== 0x1A || data[position + 7] !== 0x0A) { - error('JBIG2 error: invalid header'); + return StreamsSequenceStream; +})(); + +var FlateStream = (function FlateStreamClosure() { + var codeLenCodeMap = new Int32Array([ + 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 + ]); + + var lengthDecode = new Int32Array([ + 0x00003, 0x00004, 0x00005, 0x00006, 0x00007, 0x00008, 0x00009, 0x0000a, + 0x1000b, 0x1000d, 0x1000f, 0x10011, 0x20013, 0x20017, 0x2001b, 0x2001f, + 0x30023, 0x3002b, 0x30033, 0x3003b, 0x40043, 0x40053, 0x40063, 0x40073, + 0x50083, 0x500a3, 0x500c3, 0x500e3, 0x00102, 0x00102, 0x00102 + ]); + + var distDecode = new Int32Array([ + 0x00001, 0x00002, 0x00003, 0x00004, 0x10005, 0x10007, 0x20009, 0x2000d, + 0x30011, 0x30019, 0x40021, 0x40031, 0x50041, 0x50061, 0x60081, 0x600c1, + 0x70101, 0x70181, 0x80201, 0x80301, 0x90401, 0x90601, 0xa0801, 0xa0c01, + 0xb1001, 0xb1801, 0xc2001, 0xc3001, 0xd4001, 0xd6001 + ]); + + var fixedLitCodeTab = [new Int32Array([ + 0x70100, 0x80050, 0x80010, 0x80118, 0x70110, 0x80070, 0x80030, 0x900c0, + 0x70108, 0x80060, 0x80020, 0x900a0, 0x80000, 0x80080, 0x80040, 0x900e0, + 0x70104, 0x80058, 0x80018, 0x90090, 0x70114, 0x80078, 0x80038, 0x900d0, + 0x7010c, 0x80068, 0x80028, 0x900b0, 0x80008, 0x80088, 0x80048, 0x900f0, + 0x70102, 0x80054, 0x80014, 0x8011c, 0x70112, 0x80074, 0x80034, 0x900c8, + 0x7010a, 0x80064, 0x80024, 0x900a8, 0x80004, 0x80084, 0x80044, 0x900e8, + 0x70106, 0x8005c, 0x8001c, 0x90098, 0x70116, 0x8007c, 0x8003c, 0x900d8, + 0x7010e, 0x8006c, 0x8002c, 0x900b8, 0x8000c, 0x8008c, 0x8004c, 0x900f8, + 0x70101, 0x80052, 0x80012, 0x8011a, 0x70111, 0x80072, 0x80032, 0x900c4, + 0x70109, 0x80062, 0x80022, 0x900a4, 0x80002, 0x80082, 0x80042, 0x900e4, + 0x70105, 0x8005a, 0x8001a, 0x90094, 0x70115, 0x8007a, 0x8003a, 0x900d4, + 0x7010d, 0x8006a, 0x8002a, 0x900b4, 0x8000a, 0x8008a, 0x8004a, 0x900f4, + 0x70103, 0x80056, 0x80016, 0x8011e, 0x70113, 0x80076, 0x80036, 0x900cc, + 0x7010b, 0x80066, 0x80026, 0x900ac, 0x80006, 0x80086, 0x80046, 0x900ec, + 0x70107, 0x8005e, 0x8001e, 0x9009c, 0x70117, 0x8007e, 0x8003e, 0x900dc, + 0x7010f, 0x8006e, 0x8002e, 0x900bc, 0x8000e, 0x8008e, 0x8004e, 0x900fc, + 0x70100, 0x80051, 0x80011, 0x80119, 0x70110, 0x80071, 0x80031, 0x900c2, + 0x70108, 0x80061, 0x80021, 0x900a2, 0x80001, 0x80081, 0x80041, 0x900e2, + 0x70104, 0x80059, 0x80019, 0x90092, 0x70114, 0x80079, 0x80039, 0x900d2, + 0x7010c, 0x80069, 0x80029, 0x900b2, 0x80009, 0x80089, 0x80049, 0x900f2, + 0x70102, 0x80055, 0x80015, 0x8011d, 0x70112, 0x80075, 0x80035, 0x900ca, + 0x7010a, 0x80065, 0x80025, 0x900aa, 0x80005, 0x80085, 0x80045, 0x900ea, + 0x70106, 0x8005d, 0x8001d, 0x9009a, 0x70116, 0x8007d, 0x8003d, 0x900da, + 0x7010e, 0x8006d, 0x8002d, 0x900ba, 0x8000d, 0x8008d, 0x8004d, 0x900fa, + 0x70101, 0x80053, 0x80013, 0x8011b, 0x70111, 0x80073, 0x80033, 0x900c6, + 0x70109, 0x80063, 0x80023, 0x900a6, 0x80003, 0x80083, 0x80043, 0x900e6, + 0x70105, 0x8005b, 0x8001b, 0x90096, 0x70115, 0x8007b, 0x8003b, 0x900d6, + 0x7010d, 0x8006b, 0x8002b, 0x900b6, 0x8000b, 0x8008b, 0x8004b, 0x900f6, + 0x70103, 0x80057, 0x80017, 0x8011f, 0x70113, 0x80077, 0x80037, 0x900ce, + 0x7010b, 0x80067, 0x80027, 0x900ae, 0x80007, 0x80087, 0x80047, 0x900ee, + 0x70107, 0x8005f, 0x8001f, 0x9009e, 0x70117, 0x8007f, 0x8003f, 0x900de, + 0x7010f, 0x8006f, 0x8002f, 0x900be, 0x8000f, 0x8008f, 0x8004f, 0x900fe, + 0x70100, 0x80050, 0x80010, 0x80118, 0x70110, 0x80070, 0x80030, 0x900c1, + 0x70108, 0x80060, 0x80020, 0x900a1, 0x80000, 0x80080, 0x80040, 0x900e1, + 0x70104, 0x80058, 0x80018, 0x90091, 0x70114, 0x80078, 0x80038, 0x900d1, + 0x7010c, 0x80068, 0x80028, 0x900b1, 0x80008, 0x80088, 0x80048, 0x900f1, + 0x70102, 0x80054, 0x80014, 0x8011c, 0x70112, 0x80074, 0x80034, 0x900c9, + 0x7010a, 0x80064, 0x80024, 0x900a9, 0x80004, 0x80084, 0x80044, 0x900e9, + 0x70106, 0x8005c, 0x8001c, 0x90099, 0x70116, 0x8007c, 0x8003c, 0x900d9, + 0x7010e, 0x8006c, 0x8002c, 0x900b9, 0x8000c, 0x8008c, 0x8004c, 0x900f9, + 0x70101, 0x80052, 0x80012, 0x8011a, 0x70111, 0x80072, 0x80032, 0x900c5, + 0x70109, 0x80062, 0x80022, 0x900a5, 0x80002, 0x80082, 0x80042, 0x900e5, + 0x70105, 0x8005a, 0x8001a, 0x90095, 0x70115, 0x8007a, 0x8003a, 0x900d5, + 0x7010d, 0x8006a, 0x8002a, 0x900b5, 0x8000a, 0x8008a, 0x8004a, 0x900f5, + 0x70103, 0x80056, 0x80016, 0x8011e, 0x70113, 0x80076, 0x80036, 0x900cd, + 0x7010b, 0x80066, 0x80026, 0x900ad, 0x80006, 0x80086, 0x80046, 0x900ed, + 0x70107, 0x8005e, 0x8001e, 0x9009d, 0x70117, 0x8007e, 0x8003e, 0x900dd, + 0x7010f, 0x8006e, 0x8002e, 0x900bd, 0x8000e, 0x8008e, 0x8004e, 0x900fd, + 0x70100, 0x80051, 0x80011, 0x80119, 0x70110, 0x80071, 0x80031, 0x900c3, + 0x70108, 0x80061, 0x80021, 0x900a3, 0x80001, 0x80081, 0x80041, 0x900e3, + 0x70104, 0x80059, 0x80019, 0x90093, 0x70114, 0x80079, 0x80039, 0x900d3, + 0x7010c, 0x80069, 0x80029, 0x900b3, 0x80009, 0x80089, 0x80049, 0x900f3, + 0x70102, 0x80055, 0x80015, 0x8011d, 0x70112, 0x80075, 0x80035, 0x900cb, + 0x7010a, 0x80065, 0x80025, 0x900ab, 0x80005, 0x80085, 0x80045, 0x900eb, + 0x70106, 0x8005d, 0x8001d, 0x9009b, 0x70116, 0x8007d, 0x8003d, 0x900db, + 0x7010e, 0x8006d, 0x8002d, 0x900bb, 0x8000d, 0x8008d, 0x8004d, 0x900fb, + 0x70101, 0x80053, 0x80013, 0x8011b, 0x70111, 0x80073, 0x80033, 0x900c7, + 0x70109, 0x80063, 0x80023, 0x900a7, 0x80003, 0x80083, 0x80043, 0x900e7, + 0x70105, 0x8005b, 0x8001b, 0x90097, 0x70115, 0x8007b, 0x8003b, 0x900d7, + 0x7010d, 0x8006b, 0x8002b, 0x900b7, 0x8000b, 0x8008b, 0x8004b, 0x900f7, + 0x70103, 0x80057, 0x80017, 0x8011f, 0x70113, 0x80077, 0x80037, 0x900cf, + 0x7010b, 0x80067, 0x80027, 0x900af, 0x80007, 0x80087, 0x80047, 0x900ef, + 0x70107, 0x8005f, 0x8001f, 0x9009f, 0x70117, 0x8007f, 0x8003f, 0x900df, + 0x7010f, 0x8006f, 0x8002f, 0x900bf, 0x8000f, 0x8008f, 0x8004f, 0x900ff + ]), 9]; + + var fixedDistCodeTab = [new Int32Array([ + 0x50000, 0x50010, 0x50008, 0x50018, 0x50004, 0x50014, 0x5000c, 0x5001c, + 0x50002, 0x50012, 0x5000a, 0x5001a, 0x50006, 0x50016, 0x5000e, 0x00000, + 0x50001, 0x50011, 0x50009, 0x50019, 0x50005, 0x50015, 0x5000d, 0x5001d, + 0x50003, 0x50013, 0x5000b, 0x5001b, 0x50007, 0x50017, 0x5000f, 0x00000 + ]), 5]; + + function FlateStream(str, maybeLength) { + this.str = str; + this.dict = str.dict; + + var cmf = str.getByte(); + var flg = str.getByte(); + if (cmf === -1 || flg === -1) { + error('Invalid header in flate stream: ' + cmf + ', ' + flg); } - var header = {}; - position += 8; - var flags = data[position++]; - header.randomAccess = !(flags & 1); - if (!(flags & 2)) { - header.numberOfPages = readUint32(data, position); - position += 4; + if ((cmf & 0x0f) !== 0x08) { + error('Unknown compression method in flate stream: ' + cmf + ', ' + flg); } - var segments = readSegments(header, data, position, end); - error('Not implemented'); - // processSegments(segments, new SimpleSegmentVisitor()); - } - - function parseJbig2Chunks(chunks) { - var visitor = new SimpleSegmentVisitor(); - for (var i = 0, ii = chunks.length; i < ii; i++) { - var chunk = chunks[i]; - var segments = readSegments({}, chunk.data, chunk.start, chunk.end); - processSegments(segments, visitor); + if ((((cmf << 8) + flg) % 31) !== 0) { + error('Bad FCHECK in flate stream: ' + cmf + ', ' + flg); } - return visitor.buffer; + if (flg & 0x20) { + error('FDICT bit set in flate stream: ' + cmf + ', ' + flg); + } + + this.codeSize = 0; + this.codeBuf = 0; + + DecodeStream.call(this, maybeLength); } - function SimpleSegmentVisitor() {} + FlateStream.prototype = Object.create(DecodeStream.prototype); - SimpleSegmentVisitor.prototype = { - onPageInformation: function SimpleSegmentVisitor_onPageInformation(info) { - this.currentPageInfo = info; - var rowSize = (info.width + 7) >> 3; - var buffer = new Uint8Array(rowSize * info.height); - // The contents of ArrayBuffers are initialized to 0. - // Fill the buffer with 0xFF only if info.defaultPixelValue is set - if (info.defaultPixelValue) { - for (var i = 0, ii = buffer.length; i < ii; i++) { - buffer[i] = 0xFF; - } - } - this.buffer = buffer; - }, - drawBitmap: function SimpleSegmentVisitor_drawBitmap(regionInfo, bitmap) { - var pageInfo = this.currentPageInfo; - var width = regionInfo.width, height = regionInfo.height; - var rowSize = (pageInfo.width + 7) >> 3; - var combinationOperator = pageInfo.combinationOperatorOverride ? - regionInfo.combinationOperator : pageInfo.combinationOperator; - var buffer = this.buffer; - var mask0 = 128 >> (regionInfo.x & 7); - var offset0 = regionInfo.y * rowSize + (regionInfo.x >> 3); - var i, j, mask, offset; - switch (combinationOperator) { - case 0: // OR - for (i = 0; i < height; i++) { - mask = mask0; - offset = offset0; - for (j = 0; j < width; j++) { - if (bitmap[i][j]) { - buffer[offset] |= mask; - } - mask >>= 1; - if (!mask) { - mask = 128; - offset++; - } - } - offset0 += rowSize; - } - break; - case 2: // XOR - for (i = 0; i < height; i++) { - mask = mask0; - offset = offset0; - for (j = 0; j < width; j++) { - if (bitmap[i][j]) { - buffer[offset] ^= mask; - } - mask >>= 1; - if (!mask) { - mask = 128; - offset++; - } - } - offset0 += rowSize; - } - break; - default: - error('JBIG2 error: operator ' + combinationOperator + - ' is not supported'); - } - }, - onImmediateGenericRegion: - function SimpleSegmentVisitor_onImmediateGenericRegion(region, data, - start, end) { - var regionInfo = region.info; - var decodingContext = new DecodingContext(data, start, end); - var bitmap = decodeBitmap(region.mmr, regionInfo.width, regionInfo.height, - region.template, region.prediction, null, - region.at, decodingContext); - this.drawBitmap(regionInfo, bitmap); - }, - onImmediateLosslessGenericRegion: - function SimpleSegmentVisitor_onImmediateLosslessGenericRegion() { - this.onImmediateGenericRegion.apply(this, arguments); - }, - onSymbolDictionary: - function SimpleSegmentVisitor_onSymbolDictionary(dictionary, - currentSegment, - referredSegments, - data, start, end) { - var huffmanTables; - if (dictionary.huffman) { - error('JBIG2 error: huffman is not supported'); + FlateStream.prototype.getBits = function FlateStream_getBits(bits) { + var str = this.str; + var codeSize = this.codeSize; + var codeBuf = this.codeBuf; + + var b; + while (codeSize < bits) { + if ((b = str.getByte()) === -1) { + error('Bad encoding in flate stream'); } + codeBuf |= b << codeSize; + codeSize += 8; + } + b = codeBuf & ((1 << bits) - 1); + this.codeBuf = codeBuf >> bits; + this.codeSize = codeSize -= bits; - // Combines exported symbols from all referred segments - var symbols = this.symbols; - if (!symbols) { - this.symbols = symbols = {}; + return b; + }; + + FlateStream.prototype.getCode = function FlateStream_getCode(table) { + var str = this.str; + var codes = table[0]; + var maxLen = table[1]; + var codeSize = this.codeSize; + var codeBuf = this.codeBuf; + + var b; + while (codeSize < maxLen) { + if ((b = str.getByte()) === -1) { + // premature end of stream. code might however still be valid. + // codeSize < codeLen check below guards against incomplete codeVal. + break; } + codeBuf |= (b << codeSize); + codeSize += 8; + } + var code = codes[codeBuf & ((1 << maxLen) - 1)]; + var codeLen = code >> 16; + var codeVal = code & 0xffff; + if (codeLen < 1 || codeSize < codeLen) { + error('Bad encoding in flate stream'); + } + this.codeBuf = (codeBuf >> codeLen); + this.codeSize = (codeSize - codeLen); + return codeVal; + }; - var inputSymbols = []; - for (var i = 0, ii = referredSegments.length; i < ii; i++) { - inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]); + FlateStream.prototype.generateHuffmanTable = + function flateStreamGenerateHuffmanTable(lengths) { + var n = lengths.length; + + // find max code length + var maxLen = 0; + var i; + for (i = 0; i < n; ++i) { + if (lengths[i] > maxLen) { + maxLen = lengths[i]; } + } - var decodingContext = new DecodingContext(data, start, end); - symbols[currentSegment] = decodeSymbolDictionary(dictionary.huffman, - dictionary.refinement, inputSymbols, dictionary.numberOfNewSymbols, - dictionary.numberOfExportedSymbols, huffmanTables, - dictionary.template, dictionary.at, - dictionary.refinementTemplate, dictionary.refinementAt, - decodingContext); - }, - onImmediateTextRegion: - function SimpleSegmentVisitor_onImmediateTextRegion(region, - referredSegments, - data, start, end) { - var regionInfo = region.info; - var huffmanTables; + // build the table + var size = 1 << maxLen; + var codes = new Int32Array(size); + for (var len = 1, code = 0, skip = 2; + len <= maxLen; + ++len, code <<= 1, skip <<= 1) { + for (var val = 0; val < n; ++val) { + if (lengths[val] === len) { + // bit-reverse the code + var code2 = 0; + var t = code; + for (i = 0; i < len; ++i) { + code2 = (code2 << 1) | (t & 1); + t >>= 1; + } - // Combines exported symbols from all referred segments - var symbols = this.symbols; - var inputSymbols = []; - for (var i = 0, ii = referredSegments.length; i < ii; i++) { - inputSymbols = inputSymbols.concat(symbols[referredSegments[i]]); + // fill the table entries + for (i = code2; i < size; i += skip) { + codes[i] = (len << 16) | val; + } + ++code; + } } - var symbolCodeLength = log2(inputSymbols.length); - - var decodingContext = new DecodingContext(data, start, end); - var bitmap = decodeTextRegion(region.huffman, region.refinement, - regionInfo.width, regionInfo.height, region.defaultPixelValue, - region.numberOfSymbolInstances, region.stripSize, inputSymbols, - symbolCodeLength, region.transposed, region.dsOffset, - region.referenceCorner, region.combinationOperator, huffmanTables, - region.refinementTemplate, region.refinementAt, decodingContext); - this.drawBitmap(regionInfo, bitmap); - }, - onImmediateLosslessTextRegion: - function SimpleSegmentVisitor_onImmediateLosslessTextRegion() { - this.onImmediateTextRegion.apply(this, arguments); } - }; - function Jbig2Image() {} + return [codes, maxLen]; + }; - Jbig2Image.prototype = { - parseChunks: function Jbig2Image_parseChunks(chunks) { - return parseJbig2Chunks(chunks); + FlateStream.prototype.readBlock = function FlateStream_readBlock() { + var buffer, len; + var str = this.str; + // read block header + var hdr = this.getBits(3); + if (hdr & 1) { + this.eof = true; } - }; + hdr >>= 1; - return Jbig2Image; -})(); + if (hdr === 0) { // uncompressed block + var b; -exports.Jbig2Image = Jbig2Image; -})); + if ((b = str.getByte()) === -1) { + error('Bad block header in flate stream'); + } + var blockLen = b; + if ((b = str.getByte()) === -1) { + error('Bad block header in flate stream'); + } + blockLen |= (b << 8); + if ((b = str.getByte()) === -1) { + error('Bad block header in flate stream'); + } + var check = b; + if ((b = str.getByte()) === -1) { + error('Bad block header in flate stream'); + } + check |= (b << 8); + if (check !== (~blockLen & 0xffff) && + (blockLen !== 0 || check !== 0)) { + // Ignoring error for bad "empty" block (see issue 1277) + error('Bad uncompressed block length in flate stream'); + } + this.codeBuf = 0; + this.codeSize = 0; -(function (root, factory) { - { - factory((root.pdfjsCoreJpx = {}), root.pdfjsSharedUtil, - root.pdfjsCoreArithmeticDecoder); - } -}(this, function (exports, sharedUtil, coreArithmeticDecoder) { + var bufferLength = this.bufferLength; + buffer = this.ensureBuffer(bufferLength + blockLen); + var end = bufferLength + blockLen; + this.bufferLength = end; + if (blockLen === 0) { + if (str.peekByte() === -1) { + this.eof = true; + } + } else { + for (var n = bufferLength; n < end; ++n) { + if ((b = str.getByte()) === -1) { + this.eof = true; + break; + } + buffer[n] = b; + } + } + return; + } -var info = sharedUtil.info; -var log2 = sharedUtil.log2; -var readUint16 = sharedUtil.readUint16; -var readUint32 = sharedUtil.readUint32; -var warn = sharedUtil.warn; -var ArithmeticDecoder = coreArithmeticDecoder.ArithmeticDecoder; + var litCodeTable; + var distCodeTable; + if (hdr === 1) { // compressed block, fixed codes + litCodeTable = fixedLitCodeTab; + distCodeTable = fixedDistCodeTab; + } else if (hdr === 2) { // compressed block, dynamic codes + var numLitCodes = this.getBits(5) + 257; + var numDistCodes = this.getBits(5) + 1; + var numCodeLenCodes = this.getBits(4) + 4; -var JpxImage = (function JpxImageClosure() { - // Table E.1 - var SubbandsGainLog2 = { - 'LL': 0, - 'LH': 1, - 'HL': 1, - 'HH': 2 - }; - function JpxImage() { - this.failOnCorruptedImage = false; - } - JpxImage.prototype = { - parse: function JpxImage_parse(data) { + // build the code lengths code table + var codeLenCodeLengths = new Uint8Array(codeLenCodeMap.length); - var head = readUint16(data, 0); - // No box header, immediate start of codestream (SOC) - if (head === 0xFF4F) { - this.parseCodestream(data, 0, data.length); - return; + var i; + for (i = 0; i < numCodeLenCodes; ++i) { + codeLenCodeLengths[codeLenCodeMap[i]] = this.getBits(3); } + var codeLenCodeTab = this.generateHuffmanTable(codeLenCodeLengths); - var position = 0, length = data.length; - while (position < length) { - var headerSize = 8; - var lbox = readUint32(data, position); - var tbox = readUint32(data, position + 4); - position += headerSize; - if (lbox === 1) { - // XLBox: read UInt64 according to spec. - // JavaScript's int precision of 53 bit should be sufficient here. - lbox = readUint32(data, position) * 4294967296 + - readUint32(data, position + 4); - position += 8; - headerSize += 8; - } - if (lbox === 0) { - lbox = length - position + headerSize; - } - if (lbox < headerSize) { - throw new Error('JPX Error: Invalid box field size'); - } - var dataLength = lbox - headerSize; - var jumpDataLength = true; - switch (tbox) { - case 0x6A703268: // 'jp2h' - jumpDataLength = false; // parsing child boxes - break; - case 0x636F6C72: // 'colr' - // Colorspaces are not used, the CS from the PDF is used. - var method = data[position]; - if (method === 1) { - // enumerated colorspace - var colorspace = readUint32(data, position + 3); - switch (colorspace) { - case 16: // this indicates a sRGB colorspace - case 17: // this indicates a grayscale colorspace - case 18: // this indicates a YUV colorspace - break; - default: - warn('Unknown colorspace ' + colorspace); - break; - } - } else if (method === 2) { - info('ICC profile not supported'); - } - break; - case 0x6A703263: // 'jp2c' - this.parseCodestream(data, position, position + dataLength); - break; - case 0x6A502020: // 'jP\024\024' - if (0x0d0a870a !== readUint32(data, position)) { - warn('Invalid JP2 signature'); - } - break; - // The following header types are valid but currently not used: - case 0x6A501A1A: // 'jP\032\032' - case 0x66747970: // 'ftyp' - case 0x72726571: // 'rreq' - case 0x72657320: // 'res ' - case 0x69686472: // 'ihdr' - break; - default: - var headerType = String.fromCharCode((tbox >> 24) & 0xFF, - (tbox >> 16) & 0xFF, - (tbox >> 8) & 0xFF, - tbox & 0xFF); - warn('Unsupported header type ' + tbox + ' (' + headerType + ')'); - break; + // build the literal and distance code tables + len = 0; + i = 0; + var codes = numLitCodes + numDistCodes; + var codeLengths = new Uint8Array(codes); + var bitsLength, bitsOffset, what; + while (i < codes) { + var code = this.getCode(codeLenCodeTab); + if (code === 16) { + bitsLength = 2; bitsOffset = 3; what = len; + } else if (code === 17) { + bitsLength = 3; bitsOffset = 3; what = (len = 0); + } else if (code === 18) { + bitsLength = 7; bitsOffset = 11; what = (len = 0); + } else { + codeLengths[i++] = len = code; + continue; } - if (jumpDataLength) { - position += dataLength; + + var repeatLength = this.getBits(bitsLength) + bitsOffset; + while (repeatLength-- > 0) { + codeLengths[i++] = what; } } - }, - parseImageProperties: function JpxImage_parseImageProperties(stream) { - var newByte = stream.getByte(); - while (newByte >= 0) { - var oldByte = newByte; - newByte = stream.getByte(); - var code = (oldByte << 8) | newByte; - // Image and tile size (SIZ) - if (code === 0xFF51) { - stream.skip(4); - var Xsiz = stream.getInt32() >>> 0; // Byte 4 - var Ysiz = stream.getInt32() >>> 0; // Byte 8 - var XOsiz = stream.getInt32() >>> 0; // Byte 12 - var YOsiz = stream.getInt32() >>> 0; // Byte 16 - stream.skip(16); - var Csiz = stream.getUint16(); // Byte 36 - this.width = Xsiz - XOsiz; - this.height = Ysiz - YOsiz; - this.componentsCount = Csiz; - // Results are always returned as Uint8Arrays - this.bitsPerComponent = 8; - return; + + litCodeTable = + this.generateHuffmanTable(codeLengths.subarray(0, numLitCodes)); + distCodeTable = + this.generateHuffmanTable(codeLengths.subarray(numLitCodes, codes)); + } else { + error('Unknown block type in flate stream'); + } + + buffer = this.buffer; + var limit = buffer ? buffer.length : 0; + var pos = this.bufferLength; + while (true) { + var code1 = this.getCode(litCodeTable); + if (code1 < 256) { + if (pos + 1 >= limit) { + buffer = this.ensureBuffer(pos + 1); + limit = buffer.length; } + buffer[pos++] = code1; + continue; } - throw new Error('JPX Error: No size marker found in JPX stream'); - }, - parseCodestream: function JpxImage_parseCodestream(data, start, end) { - var context = {}; - try { - var doNotRecover = false; - var position = start; - while (position + 1 < end) { - var code = readUint16(data, position); - position += 2; + if (code1 === 256) { + this.bufferLength = pos; + return; + } + code1 -= 257; + code1 = lengthDecode[code1]; + var code2 = code1 >> 16; + if (code2 > 0) { + code2 = this.getBits(code2); + } + len = (code1 & 0xffff) + code2; + code1 = this.getCode(distCodeTable); + code1 = distDecode[code1]; + code2 = code1 >> 16; + if (code2 > 0) { + code2 = this.getBits(code2); + } + var dist = (code1 & 0xffff) + code2; + if (pos + len >= limit) { + buffer = this.ensureBuffer(pos + len); + limit = buffer.length; + } + for (var k = 0; k < len; ++k, ++pos) { + buffer[pos] = buffer[pos - dist]; + } + } + }; - var length = 0, j, sqcd, spqcds, spqcdSize, scalarExpounded, tile; - switch (code) { - case 0xFF4F: // Start of codestream (SOC) - context.mainHeader = true; - break; - case 0xFFD9: // End of codestream (EOC) - break; - case 0xFF51: // Image and tile size (SIZ) - length = readUint16(data, position); - var siz = {}; - siz.Xsiz = readUint32(data, position + 4); - siz.Ysiz = readUint32(data, position + 8); - siz.XOsiz = readUint32(data, position + 12); - siz.YOsiz = readUint32(data, position + 16); - siz.XTsiz = readUint32(data, position + 20); - siz.YTsiz = readUint32(data, position + 24); - siz.XTOsiz = readUint32(data, position + 28); - siz.YTOsiz = readUint32(data, position + 32); - var componentsCount = readUint16(data, position + 36); - siz.Csiz = componentsCount; - var components = []; - j = position + 38; - for (var i = 0; i < componentsCount; i++) { - var component = { - precision: (data[j] & 0x7F) + 1, - isSigned: !!(data[j] & 0x80), - XRsiz: data[j + 1], - YRsiz: data[j + 1] - }; - calculateComponentDimensions(component, siz); - components.push(component); - } - context.SIZ = siz; - context.components = components; - calculateTileGrids(context, components); - context.QCC = []; - context.COC = []; - break; - case 0xFF5C: // Quantization default (QCD) - length = readUint16(data, position); - var qcd = {}; - j = position + 2; - sqcd = data[j++]; - switch (sqcd & 0x1F) { - case 0: - spqcdSize = 8; - scalarExpounded = true; - break; - case 1: - spqcdSize = 16; - scalarExpounded = false; - break; - case 2: - spqcdSize = 16; - scalarExpounded = true; - break; - default: - throw new Error('JPX Error: Invalid SQcd value ' + sqcd); - } - qcd.noQuantization = (spqcdSize === 8); - qcd.scalarExpounded = scalarExpounded; - qcd.guardBits = sqcd >> 5; - spqcds = []; - while (j < length + position) { - var spqcd = {}; - if (spqcdSize === 8) { - spqcd.epsilon = data[j++] >> 3; - spqcd.mu = 0; - } else { - spqcd.epsilon = data[j] >> 3; - spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1]; - j += 2; - } - spqcds.push(spqcd); - } - qcd.SPqcds = spqcds; - if (context.mainHeader) { - context.QCD = qcd; - } else { - context.currentTile.QCD = qcd; - context.currentTile.QCC = []; - } - break; - case 0xFF5D: // Quantization component (QCC) - length = readUint16(data, position); - var qcc = {}; - j = position + 2; - var cqcc; - if (context.SIZ.Csiz < 257) { - cqcc = data[j++]; - } else { - cqcc = readUint16(data, j); - j += 2; - } - sqcd = data[j++]; - switch (sqcd & 0x1F) { - case 0: - spqcdSize = 8; - scalarExpounded = true; - break; - case 1: - spqcdSize = 16; - scalarExpounded = false; - break; - case 2: - spqcdSize = 16; - scalarExpounded = true; - break; - default: - throw new Error('JPX Error: Invalid SQcd value ' + sqcd); - } - qcc.noQuantization = (spqcdSize === 8); - qcc.scalarExpounded = scalarExpounded; - qcc.guardBits = sqcd >> 5; - spqcds = []; - while (j < (length + position)) { - spqcd = {}; - if (spqcdSize === 8) { - spqcd.epsilon = data[j++] >> 3; - spqcd.mu = 0; - } else { - spqcd.epsilon = data[j] >> 3; - spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1]; - j += 2; - } - spqcds.push(spqcd); - } - qcc.SPqcds = spqcds; - if (context.mainHeader) { - context.QCC[cqcc] = qcc; - } else { - context.currentTile.QCC[cqcc] = qcc; - } - break; - case 0xFF52: // Coding style default (COD) - length = readUint16(data, position); - var cod = {}; - j = position + 2; - var scod = data[j++]; - cod.entropyCoderWithCustomPrecincts = !!(scod & 1); - cod.sopMarkerUsed = !!(scod & 2); - cod.ephMarkerUsed = !!(scod & 4); - cod.progressionOrder = data[j++]; - cod.layersCount = readUint16(data, j); - j += 2; - cod.multipleComponentTransform = data[j++]; + return FlateStream; +})(); + +var PredictorStream = (function PredictorStreamClosure() { + function PredictorStream(str, maybeLength, params) { + var predictor = this.predictor = params.get('Predictor') || 1; + + if (predictor <= 1) { + return str; // no prediction + } + if (predictor !== 2 && (predictor < 10 || predictor > 15)) { + error('Unsupported predictor: ' + predictor); + } + + if (predictor === 2) { + this.readBlock = this.readBlockTiff; + } else { + this.readBlock = this.readBlockPng; + } + + this.str = str; + this.dict = str.dict; + + var colors = this.colors = params.get('Colors') || 1; + var bits = this.bits = params.get('BitsPerComponent') || 8; + var columns = this.columns = params.get('Columns') || 1; - cod.decompositionLevelsCount = data[j++]; - cod.xcb = (data[j++] & 0xF) + 2; - cod.ycb = (data[j++] & 0xF) + 2; - var blockStyle = data[j++]; - cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1); - cod.resetContextProbabilities = !!(blockStyle & 2); - cod.terminationOnEachCodingPass = !!(blockStyle & 4); - cod.verticalyStripe = !!(blockStyle & 8); - cod.predictableTermination = !!(blockStyle & 16); - cod.segmentationSymbolUsed = !!(blockStyle & 32); - cod.reversibleTransformation = data[j++]; - if (cod.entropyCoderWithCustomPrecincts) { - var precinctsSizes = []; - while (j < length + position) { - var precinctsSize = data[j++]; - precinctsSizes.push({ - PPx: precinctsSize & 0xF, - PPy: precinctsSize >> 4 - }); - } - cod.precinctsSizes = precinctsSizes; - } - var unsupported = []; - if (cod.selectiveArithmeticCodingBypass) { - unsupported.push('selectiveArithmeticCodingBypass'); - } - if (cod.resetContextProbabilities) { - unsupported.push('resetContextProbabilities'); - } - if (cod.terminationOnEachCodingPass) { - unsupported.push('terminationOnEachCodingPass'); - } - if (cod.verticalyStripe) { - unsupported.push('verticalyStripe'); - } - if (cod.predictableTermination) { - unsupported.push('predictableTermination'); - } - if (unsupported.length > 0) { - doNotRecover = true; - throw new Error('JPX Error: Unsupported COD options (' + - unsupported.join(', ') + ')'); - } - if (context.mainHeader) { - context.COD = cod; - } else { - context.currentTile.COD = cod; - context.currentTile.COC = []; - } - break; - case 0xFF90: // Start of tile-part (SOT) - length = readUint16(data, position); - tile = {}; - tile.index = readUint16(data, position + 2); - tile.length = readUint32(data, position + 4); - tile.dataEnd = tile.length + position - 2; - tile.partIndex = data[position + 8]; - tile.partsCount = data[position + 9]; + this.pixBytes = (colors * bits + 7) >> 3; + this.rowBytes = (columns * colors * bits + 7) >> 3; - context.mainHeader = false; - if (tile.partIndex === 0) { - // reset component specific settings - tile.COD = context.COD; - tile.COC = context.COC.slice(0); // clone of the global COC - tile.QCD = context.QCD; - tile.QCC = context.QCC.slice(0); // clone of the global COC - } - context.currentTile = tile; - break; - case 0xFF93: // Start of data (SOD) - tile = context.currentTile; - if (tile.partIndex === 0) { - initializeTile(context, tile.index); - buildPackets(context); - } + DecodeStream.call(this, maybeLength); + return this; + } - // moving to the end of the data - length = tile.dataEnd - position; - parseTilePackets(context, data, position, length); - break; - case 0xFF55: // Tile-part lengths, main header (TLM) - case 0xFF57: // Packet length, main header (PLM) - case 0xFF58: // Packet length, tile-part header (PLT) - case 0xFF64: // Comment (COM) - length = readUint16(data, position); - // skipping content - break; - case 0xFF53: // Coding style component (COC) - throw new Error('JPX Error: Codestream code 0xFF53 (COC) is ' + - 'not implemented'); - default: - throw new Error('JPX Error: Unknown codestream code: ' + - code.toString(16)); + PredictorStream.prototype = Object.create(DecodeStream.prototype); + + PredictorStream.prototype.readBlockTiff = + function predictorStreamReadBlockTiff() { + var rowBytes = this.rowBytes; + + var bufferLength = this.bufferLength; + var buffer = this.ensureBuffer(bufferLength + rowBytes); + + var bits = this.bits; + var colors = this.colors; + + var rawBytes = this.str.getBytes(rowBytes); + this.eof = !rawBytes.length; + if (this.eof) { + return; + } + + var inbuf = 0, outbuf = 0; + var inbits = 0, outbits = 0; + var pos = bufferLength; + var i; + + if (bits === 1) { + for (i = 0; i < rowBytes; ++i) { + var c = rawBytes[i]; + inbuf = (inbuf << 8) | c; + // bitwise addition is exclusive or + // first shift inbuf and then add + buffer[pos++] = (c ^ (inbuf >> colors)) & 0xFF; + // truncate inbuf (assumes colors < 16) + inbuf &= 0xFFFF; + } + } else if (bits === 8) { + for (i = 0; i < colors; ++i) { + buffer[pos++] = rawBytes[i]; + } + for (; i < rowBytes; ++i) { + buffer[pos] = buffer[pos - colors] + rawBytes[i]; + pos++; + } + } else { + var compArray = new Uint8Array(colors + 1); + var bitMask = (1 << bits) - 1; + var j = 0, k = bufferLength; + var columns = this.columns; + for (i = 0; i < columns; ++i) { + for (var kk = 0; kk < colors; ++kk) { + if (inbits < bits) { + inbuf = (inbuf << 8) | (rawBytes[j++] & 0xFF); + inbits += 8; + } + compArray[kk] = (compArray[kk] + + (inbuf >> (inbits - bits))) & bitMask; + inbits -= bits; + outbuf = (outbuf << bits) | compArray[kk]; + outbits += bits; + if (outbits >= 8) { + buffer[k++] = (outbuf >> (outbits - 8)) & 0xFF; + outbits -= 8; } - position += length; - } - } catch (e) { - if (doNotRecover || this.failOnCorruptedImage) { - throw e; - } else { - warn('Trying to recover from ' + e.message); } } - this.tiles = transformComponents(context); - this.width = context.SIZ.Xsiz - context.SIZ.XOsiz; - this.height = context.SIZ.Ysiz - context.SIZ.YOsiz; - this.componentsCount = context.SIZ.Csiz; + if (outbits > 0) { + buffer[k++] = (outbuf << (8 - outbits)) + + (inbuf & ((1 << (8 - outbits)) - 1)); + } } + this.bufferLength += rowBytes; }; - function calculateComponentDimensions(component, siz) { - // Section B.2 Component mapping - component.x0 = Math.ceil(siz.XOsiz / component.XRsiz); - component.x1 = Math.ceil(siz.Xsiz / component.XRsiz); - component.y0 = Math.ceil(siz.YOsiz / component.YRsiz); - component.y1 = Math.ceil(siz.Ysiz / component.YRsiz); - component.width = component.x1 - component.x0; - component.height = component.y1 - component.y0; - } - function calculateTileGrids(context, components) { - var siz = context.SIZ; - // Section B.3 Division into tile and tile-components - var tile, tiles = []; - var numXtiles = Math.ceil((siz.Xsiz - siz.XTOsiz) / siz.XTsiz); - var numYtiles = Math.ceil((siz.Ysiz - siz.YTOsiz) / siz.YTsiz); - for (var q = 0; q < numYtiles; q++) { - for (var p = 0; p < numXtiles; p++) { - tile = {}; - tile.tx0 = Math.max(siz.XTOsiz + p * siz.XTsiz, siz.XOsiz); - tile.ty0 = Math.max(siz.YTOsiz + q * siz.YTsiz, siz.YOsiz); - tile.tx1 = Math.min(siz.XTOsiz + (p + 1) * siz.XTsiz, siz.Xsiz); - tile.ty1 = Math.min(siz.YTOsiz + (q + 1) * siz.YTsiz, siz.Ysiz); - tile.width = tile.tx1 - tile.tx0; - tile.height = tile.ty1 - tile.ty0; - tile.components = []; - tiles.push(tile); - } + + PredictorStream.prototype.readBlockPng = + function predictorStreamReadBlockPng() { + + var rowBytes = this.rowBytes; + var pixBytes = this.pixBytes; + + var predictor = this.str.getByte(); + var rawBytes = this.str.getBytes(rowBytes); + this.eof = !rawBytes.length; + if (this.eof) { + return; } - context.tiles = tiles; - var componentsCount = siz.Csiz; - for (var i = 0, ii = componentsCount; i < ii; i++) { - var component = components[i]; - for (var j = 0, jj = tiles.length; j < jj; j++) { - var tileComponent = {}; - tile = tiles[j]; - tileComponent.tcx0 = Math.ceil(tile.tx0 / component.XRsiz); - tileComponent.tcy0 = Math.ceil(tile.ty0 / component.YRsiz); - tileComponent.tcx1 = Math.ceil(tile.tx1 / component.XRsiz); - tileComponent.tcy1 = Math.ceil(tile.ty1 / component.YRsiz); - tileComponent.width = tileComponent.tcx1 - tileComponent.tcx0; - tileComponent.height = tileComponent.tcy1 - tileComponent.tcy0; - tile.components[i] = tileComponent; + var bufferLength = this.bufferLength; + var buffer = this.ensureBuffer(bufferLength + rowBytes); + + var prevRow = buffer.subarray(bufferLength - rowBytes, bufferLength); + if (prevRow.length === 0) { + prevRow = new Uint8Array(rowBytes); + } + + var i, j = bufferLength, up, c; + switch (predictor) { + case 0: + for (i = 0; i < rowBytes; ++i) { + buffer[j++] = rawBytes[i]; + } + break; + case 1: + for (i = 0; i < pixBytes; ++i) { + buffer[j++] = rawBytes[i]; + } + for (; i < rowBytes; ++i) { + buffer[j] = (buffer[j - pixBytes] + rawBytes[i]) & 0xFF; + j++; + } + break; + case 2: + for (i = 0; i < rowBytes; ++i) { + buffer[j++] = (prevRow[i] + rawBytes[i]) & 0xFF; + } + break; + case 3: + for (i = 0; i < pixBytes; ++i) { + buffer[j++] = (prevRow[i] >> 1) + rawBytes[i]; + } + for (; i < rowBytes; ++i) { + buffer[j] = (((prevRow[i] + buffer[j - pixBytes]) >> 1) + + rawBytes[i]) & 0xFF; + j++; + } + break; + case 4: + // we need to save the up left pixels values. the simplest way + // is to create a new buffer + for (i = 0; i < pixBytes; ++i) { + up = prevRow[i]; + c = rawBytes[i]; + buffer[j++] = up + c; + } + for (; i < rowBytes; ++i) { + up = prevRow[i]; + var upLeft = prevRow[i - pixBytes]; + var left = buffer[j - pixBytes]; + var p = left + up - upLeft; + + var pa = p - left; + if (pa < 0) { + pa = -pa; + } + var pb = p - up; + if (pb < 0) { + pb = -pb; + } + var pc = p - upLeft; + if (pc < 0) { + pc = -pc; + } + + c = rawBytes[i]; + if (pa <= pb && pa <= pc) { + buffer[j++] = left + c; + } else if (pb <= pc) { + buffer[j++] = up + c; + } else { + buffer[j++] = upLeft + c; + } + } + break; + default: + error('Unsupported predictor: ' + predictor); + } + this.bufferLength += rowBytes; + }; + + return PredictorStream; +})(); + +/** + * Depending on the type of JPEG a JpegStream is handled in different ways. For + * JPEG's that are supported natively such as DeviceGray and DeviceRGB the image + * data is stored and then loaded by the browser. For unsupported JPEG's we use + * a library to decode these images and the stream behaves like all the other + * DecodeStreams. + */ +var JpegStream = (function JpegStreamClosure() { + function JpegStream(stream, maybeLength, dict, xref) { + // Some images may contain 'junk' before the SOI (start-of-image) marker. + // Note: this seems to mainly affect inline images. + var ch; + while ((ch = stream.getByte()) !== -1) { + if (ch === 0xFF) { // Find the first byte of the SOI marker (0xFFD8). + stream.skip(-1); // Reset the stream position to the SOI. + break; } } + this.stream = stream; + this.maybeLength = maybeLength; + this.dict = dict; + + DecodeStream.call(this, maybeLength); } - function getBlocksDimensions(context, component, r) { - var codOrCoc = component.codingStyleParameters; - var result = {}; - if (!codOrCoc.entropyCoderWithCustomPrecincts) { - result.PPx = 15; - result.PPy = 15; - } else { - result.PPx = codOrCoc.precinctsSizes[r].PPx; - result.PPy = codOrCoc.precinctsSizes[r].PPy; + + JpegStream.prototype = Object.create(DecodeStream.prototype); + + Object.defineProperty(JpegStream.prototype, 'bytes', { + get: function JpegStream_bytes() { + // If this.maybeLength is null, we'll get the entire stream. + return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); + }, + configurable: true + }); + + JpegStream.prototype.ensureBuffer = function JpegStream_ensureBuffer(req) { + if (this.bufferLength) { + return; } - // calculate codeblock size as described in section B.7 - result.xcb_ = (r > 0 ? Math.min(codOrCoc.xcb, result.PPx - 1) : - Math.min(codOrCoc.xcb, result.PPx)); - result.ycb_ = (r > 0 ? Math.min(codOrCoc.ycb, result.PPy - 1) : - Math.min(codOrCoc.ycb, result.PPy)); - return result; - } - function buildPrecincts(context, resolution, dimensions) { - // Section B.6 Division resolution to precincts - var precinctWidth = 1 << dimensions.PPx; - var precinctHeight = 1 << dimensions.PPy; - // Jasper introduces codeblock groups for mapping each subband codeblocks - // to precincts. Precinct partition divides a resolution according to width - // and height parameters. The subband that belongs to the resolution level - // has a different size than the level, unless it is the zero resolution. + try { + var jpegImage = new JpegImage(); - // From Jasper documentation: jpeg2000.pdf, section K: Tier-2 coding: - // The precinct partitioning for a particular subband is derived from a - // partitioning of its parent LL band (i.e., the LL band at the next higher - // resolution level)... The LL band associated with each resolution level is - // divided into precincts... Each of the resulting precinct regions is then - // mapped into its child subbands (if any) at the next lower resolution - // level. This is accomplished by using the coordinate transformation - // (u, v) = (ceil(x/2), ceil(y/2)) where (x, y) and (u, v) are the - // coordinates of a point in the LL band and child subband, respectively. - var isZeroRes = resolution.resLevel === 0; - var precinctWidthInSubband = 1 << (dimensions.PPx + (isZeroRes ? 0 : -1)); - var precinctHeightInSubband = 1 << (dimensions.PPy + (isZeroRes ? 0 : -1)); - var numprecinctswide = (resolution.trx1 > resolution.trx0 ? - Math.ceil(resolution.trx1 / precinctWidth) - - Math.floor(resolution.trx0 / precinctWidth) : 0); - var numprecinctshigh = (resolution.try1 > resolution.try0 ? - Math.ceil(resolution.try1 / precinctHeight) - - Math.floor(resolution.try0 / precinctHeight) : 0); - var numprecincts = numprecinctswide * numprecinctshigh; + // checking if values needs to be transformed before conversion + if (this.forceRGB && this.dict && isArray(this.dict.get('Decode'))) { + var decodeArr = this.dict.get('Decode'); + var bitsPerComponent = this.dict.get('BitsPerComponent') || 8; + var decodeArrLength = decodeArr.length; + var transform = new Int32Array(decodeArrLength); + var transformNeeded = false; + var maxValue = (1 << bitsPerComponent) - 1; + for (var i = 0; i < decodeArrLength; i += 2) { + transform[i] = ((decodeArr[i + 1] - decodeArr[i]) * 256) | 0; + transform[i + 1] = (decodeArr[i] * maxValue) | 0; + if (transform[i] !== 256 || transform[i + 1] !== 0) { + transformNeeded = true; + } + } + if (transformNeeded) { + jpegImage.decodeTransform = transform; + } + } - resolution.precinctParameters = { - precinctWidth: precinctWidth, - precinctHeight: precinctHeight, - numprecinctswide: numprecinctswide, - numprecinctshigh: numprecinctshigh, - numprecincts: numprecincts, - precinctWidthInSubband: precinctWidthInSubband, - precinctHeightInSubband: precinctHeightInSubband - }; + jpegImage.parse(this.bytes); + var data = jpegImage.getData(this.drawWidth, this.drawHeight, + this.forceRGB); + this.buffer = data; + this.bufferLength = data.length; + this.eof = true; + } catch (e) { + error('JPEG error: ' + e); + } + }; + + JpegStream.prototype.getBytes = function JpegStream_getBytes(length) { + this.ensureBuffer(); + return this.buffer; + }; + + JpegStream.prototype.getIR = function JpegStream_getIR() { + return PDFJS.createObjectURL(this.bytes, 'image/jpeg'); + }; + /** + * Checks if the image can be decoded and displayed by the browser without any + * further processing such as color space conversions. + */ + JpegStream.prototype.isNativelySupported = + function JpegStream_isNativelySupported(xref, res) { + var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res); + return (cs.name === 'DeviceGray' || cs.name === 'DeviceRGB') && + cs.isDefaultDecode(this.dict.get('Decode', 'D')); + }; + /** + * Checks if the image can be decoded by the browser. + */ + JpegStream.prototype.isNativelyDecodable = + function JpegStream_isNativelyDecodable(xref, res) { + var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res); + return (cs.numComps === 1 || cs.numComps === 3) && + cs.isDefaultDecode(this.dict.get('Decode', 'D')); + }; + + return JpegStream; +})(); + +/** + * For JPEG 2000's we use a library to decode these images and + * the stream behaves like all the other DecodeStreams. + */ +var JpxStream = (function JpxStreamClosure() { + function JpxStream(stream, maybeLength, dict) { + this.stream = stream; + this.maybeLength = maybeLength; + this.dict = dict; + + DecodeStream.call(this, maybeLength); } - function buildCodeblocks(context, subband, dimensions) { - // Section B.7 Division sub-band into code-blocks - var xcb_ = dimensions.xcb_; - var ycb_ = dimensions.ycb_; - var codeblockWidth = 1 << xcb_; - var codeblockHeight = 1 << ycb_; - var cbx0 = subband.tbx0 >> xcb_; - var cby0 = subband.tby0 >> ycb_; - var cbx1 = (subband.tbx1 + codeblockWidth - 1) >> xcb_; - var cby1 = (subband.tby1 + codeblockHeight - 1) >> ycb_; - var precinctParameters = subband.resolution.precinctParameters; - var codeblocks = []; - var precincts = []; - var i, j, codeblock, precinctNumber; - for (j = cby0; j < cby1; j++) { - for (i = cbx0; i < cbx1; i++) { - codeblock = { - cbx: i, - cby: j, - tbx0: codeblockWidth * i, - tby0: codeblockHeight * j, - tbx1: codeblockWidth * (i + 1), - tby1: codeblockHeight * (j + 1) - }; - codeblock.tbx0_ = Math.max(subband.tbx0, codeblock.tbx0); - codeblock.tby0_ = Math.max(subband.tby0, codeblock.tby0); - codeblock.tbx1_ = Math.min(subband.tbx1, codeblock.tbx1); - codeblock.tby1_ = Math.min(subband.tby1, codeblock.tby1); + JpxStream.prototype = Object.create(DecodeStream.prototype); + + Object.defineProperty(JpxStream.prototype, 'bytes', { + get: function JpxStream_bytes() { + // If this.maybeLength is null, we'll get the entire stream. + return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); + }, + configurable: true + }); + + JpxStream.prototype.ensureBuffer = function JpxStream_ensureBuffer(req) { + if (this.bufferLength) { + return; + } + + var jpxImage = new JpxImage(); + jpxImage.parse(this.bytes); + + var width = jpxImage.width; + var height = jpxImage.height; + var componentsCount = jpxImage.componentsCount; + var tileCount = jpxImage.tiles.length; + if (tileCount === 1) { + this.buffer = jpxImage.tiles[0].items; + } else { + var data = new Uint8Array(width * height * componentsCount); - // Calculate precinct number for this codeblock, codeblock position - // should be relative to its subband, use actual dimension and position - // See comment about codeblock group width and height - var pi = Math.floor((codeblock.tbx0_ - subband.tbx0) / - precinctParameters.precinctWidthInSubband); - var pj = Math.floor((codeblock.tby0_ - subband.tby0) / - precinctParameters.precinctHeightInSubband); - precinctNumber = pi + (pj * precinctParameters.numprecinctswide); + for (var k = 0; k < tileCount; k++) { + var tileComponents = jpxImage.tiles[k]; + var tileWidth = tileComponents.width; + var tileHeight = tileComponents.height; + var tileLeft = tileComponents.left; + var tileTop = tileComponents.top; - codeblock.precinctNumber = precinctNumber; - codeblock.subbandType = subband.type; - codeblock.Lblock = 3; + var src = tileComponents.items; + var srcPosition = 0; + var dataPosition = (width * tileTop + tileLeft) * componentsCount; + var imgRowSize = width * componentsCount; + var tileRowSize = tileWidth * componentsCount; - if (codeblock.tbx1_ <= codeblock.tbx0_ || - codeblock.tby1_ <= codeblock.tby0_) { - continue; - } - codeblocks.push(codeblock); - // building precinct for the sub-band - var precinct = precincts[precinctNumber]; - if (precinct !== undefined) { - if (i < precinct.cbxMin) { - precinct.cbxMin = i; - } else if (i > precinct.cbxMax) { - precinct.cbxMax = i; - } - if (j < precinct.cbyMin) { - precinct.cbxMin = j; - } else if (j > precinct.cbyMax) { - precinct.cbyMax = j; - } - } else { - precincts[precinctNumber] = precinct = { - cbxMin: i, - cbyMin: j, - cbxMax: i, - cbyMax: j - }; + for (var j = 0; j < tileHeight; j++) { + var rowBytes = src.subarray(srcPosition, srcPosition + tileRowSize); + data.set(rowBytes, dataPosition); + srcPosition += tileRowSize; + dataPosition += imgRowSize; } - codeblock.precinct = precinct; } + this.buffer = data; } - subband.codeblockParameters = { - codeblockWidth: xcb_, - codeblockHeight: ycb_, - numcodeblockwide: cbx1 - cbx0 + 1, - numcodeblockhigh: cby1 - cby0 + 1 - }; - subband.codeblocks = codeblocks; - subband.precincts = precincts; + this.bufferLength = this.buffer.length; + this.eof = true; + }; + + return JpxStream; +})(); + +/** + * For JBIG2's we use a library to decode these images and + * the stream behaves like all the other DecodeStreams. + */ +var Jbig2Stream = (function Jbig2StreamClosure() { + function Jbig2Stream(stream, maybeLength, dict) { + this.stream = stream; + this.maybeLength = maybeLength; + this.dict = dict; + + DecodeStream.call(this, maybeLength); } - function createPacket(resolution, precinctNumber, layerNumber) { - var precinctCodeblocks = []; - // Section B.10.8 Order of info in packet - var subbands = resolution.subbands; - // sub-bands already ordered in 'LL', 'HL', 'LH', and 'HH' sequence - for (var i = 0, ii = subbands.length; i < ii; i++) { - var subband = subbands[i]; - var codeblocks = subband.codeblocks; - for (var j = 0, jj = codeblocks.length; j < jj; j++) { - var codeblock = codeblocks[j]; - if (codeblock.precinctNumber !== precinctNumber) { - continue; - } - precinctCodeblocks.push(codeblock); + + Jbig2Stream.prototype = Object.create(DecodeStream.prototype); + + Object.defineProperty(Jbig2Stream.prototype, 'bytes', { + get: function Jbig2Stream_bytes() { + // If this.maybeLength is null, we'll get the entire stream. + return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); + }, + configurable: true + }); + + Jbig2Stream.prototype.ensureBuffer = function Jbig2Stream_ensureBuffer(req) { + if (this.bufferLength) { + return; + } + + var jbig2Image = new Jbig2Image(); + + var chunks = [], xref = this.dict.xref; + var decodeParams = xref.fetchIfRef(this.dict.get('DecodeParms')); + + // According to the PDF specification, DecodeParms can be either + // a dictionary, or an array whose elements are dictionaries. + if (isArray(decodeParams)) { + if (decodeParams.length > 1) { + warn('JBIG2 - \'DecodeParms\' array with multiple elements ' + + 'not supported.'); } + decodeParams = xref.fetchIfRef(decodeParams[0]); } - return { - layerNumber: layerNumber, - codeblocks: precinctCodeblocks - }; - } - function LayerResolutionComponentPositionIterator(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var layersCount = tile.codingStyleDefaultParameters.layersCount; - var componentsCount = siz.Csiz; - var maxDecompositionLevelsCount = 0; - for (var q = 0; q < componentsCount; q++) { - maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, - tile.components[q].codingStyleParameters.decompositionLevelsCount); + if (decodeParams && decodeParams.has('JBIG2Globals')) { + var globalsStream = decodeParams.get('JBIG2Globals'); + var globals = globalsStream.getBytes(); + chunks.push({data: globals, start: 0, end: globals.length}); } + chunks.push({data: this.bytes, start: 0, end: this.bytes.length}); + var data = jbig2Image.parseChunks(chunks); + var dataLength = data.length; - var l = 0, r = 0, i = 0, k = 0; + // JBIG2 had black as 1 and white as 0, inverting the colors + for (var i = 0; i < dataLength; i++) { + data[i] ^= 0xFF; + } - this.nextPacket = function JpxImage_nextPacket() { - // Section B.12.1.1 Layer-resolution-component-position - for (; l < layersCount; l++) { - for (; r <= maxDecompositionLevelsCount; r++) { - for (; i < componentsCount; i++) { - var component = tile.components[i]; - if (r > component.codingStyleParameters.decompositionLevelsCount) { - continue; - } + this.buffer = data; + this.bufferLength = dataLength; + this.eof = true; + }; - var resolution = component.resolutions[r]; - var numprecincts = resolution.precinctParameters.numprecincts; - for (; k < numprecincts;) { - var packet = createPacket(resolution, k, l); - k++; - return packet; - } - k = 0; - } - i = 0; - } - r = 0; - } - throw new Error('JPX Error: Out of packets'); - }; + return Jbig2Stream; +})(); + +var DecryptStream = (function DecryptStreamClosure() { + function DecryptStream(str, maybeLength, decrypt) { + this.str = str; + this.dict = str.dict; + this.decrypt = decrypt; + this.nextChunk = null; + this.initialized = false; + + DecodeStream.call(this, maybeLength); } - function ResolutionLayerComponentPositionIterator(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var layersCount = tile.codingStyleDefaultParameters.layersCount; - var componentsCount = siz.Csiz; - var maxDecompositionLevelsCount = 0; - for (var q = 0; q < componentsCount; q++) { - maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, - tile.components[q].codingStyleParameters.decompositionLevelsCount); + + var chunkSize = 512; + + DecryptStream.prototype = Object.create(DecodeStream.prototype); + + DecryptStream.prototype.readBlock = function DecryptStream_readBlock() { + var chunk; + if (this.initialized) { + chunk = this.nextChunk; + } else { + chunk = this.str.getBytes(chunkSize); + this.initialized = true; + } + if (!chunk || chunk.length === 0) { + this.eof = true; + return; } + this.nextChunk = this.str.getBytes(chunkSize); + var hasMoreData = this.nextChunk && this.nextChunk.length > 0; - var r = 0, l = 0, i = 0, k = 0; + var decrypt = this.decrypt; + chunk = decrypt(chunk, !hasMoreData); - this.nextPacket = function JpxImage_nextPacket() { - // Section B.12.1.2 Resolution-layer-component-position - for (; r <= maxDecompositionLevelsCount; r++) { - for (; l < layersCount; l++) { - for (; i < componentsCount; i++) { - var component = tile.components[i]; - if (r > component.codingStyleParameters.decompositionLevelsCount) { - continue; - } + var bufferLength = this.bufferLength; + var i, n = chunk.length; + var buffer = this.ensureBuffer(bufferLength + n); + for (i = 0; i < n; i++) { + buffer[bufferLength++] = chunk[i]; + } + this.bufferLength = bufferLength; + }; - var resolution = component.resolutions[r]; - var numprecincts = resolution.precinctParameters.numprecincts; - for (; k < numprecincts;) { - var packet = createPacket(resolution, k, l); - k++; - return packet; - } - k = 0; - } - i = 0; - } - l = 0; - } - throw new Error('JPX Error: Out of packets'); - }; + return DecryptStream; +})(); + +var Ascii85Stream = (function Ascii85StreamClosure() { + function Ascii85Stream(str, maybeLength) { + this.str = str; + this.dict = str.dict; + this.input = new Uint8Array(5); + + // Most streams increase in size when decoded, but Ascii85 streams + // typically shrink by ~20%. + if (maybeLength) { + maybeLength = 0.8 * maybeLength; + } + DecodeStream.call(this, maybeLength); } - function ResolutionPositionComponentLayerIterator(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var layersCount = tile.codingStyleDefaultParameters.layersCount; - var componentsCount = siz.Csiz; - var l, r, c, p; - var maxDecompositionLevelsCount = 0; - for (c = 0; c < componentsCount; c++) { - var component = tile.components[c]; - maxDecompositionLevelsCount = Math.max(maxDecompositionLevelsCount, - component.codingStyleParameters.decompositionLevelsCount); + + Ascii85Stream.prototype = Object.create(DecodeStream.prototype); + + Ascii85Stream.prototype.readBlock = function Ascii85Stream_readBlock() { + var TILDA_CHAR = 0x7E; // '~' + var Z_LOWER_CHAR = 0x7A; // 'z' + var EOF = -1; + + var str = this.str; + + var c = str.getByte(); + while (Lexer.isSpace(c)) { + c = str.getByte(); } - var maxNumPrecinctsInLevel = new Int32Array( - maxDecompositionLevelsCount + 1); - for (r = 0; r <= maxDecompositionLevelsCount; ++r) { - var maxNumPrecincts = 0; - for (c = 0; c < componentsCount; ++c) { - var resolutions = tile.components[c].resolutions; - if (r < resolutions.length) { - maxNumPrecincts = Math.max(maxNumPrecincts, - resolutions[r].precinctParameters.numprecincts); - } - } - maxNumPrecinctsInLevel[r] = maxNumPrecincts; + + if (c === EOF || c === TILDA_CHAR) { + this.eof = true; + return; } - l = 0; - r = 0; - c = 0; - p = 0; - this.nextPacket = function JpxImage_nextPacket() { - // Section B.12.1.3 Resolution-position-component-layer - for (; r <= maxDecompositionLevelsCount; r++) { - for (; p < maxNumPrecinctsInLevel[r]; p++) { - for (; c < componentsCount; c++) { - var component = tile.components[c]; - if (r > component.codingStyleParameters.decompositionLevelsCount) { - continue; - } - var resolution = component.resolutions[r]; - var numprecincts = resolution.precinctParameters.numprecincts; - if (p >= numprecincts) { - continue; - } - for (; l < layersCount;) { - var packet = createPacket(resolution, p, l); - l++; - return packet; - } - l = 0; - } - c = 0; + var bufferLength = this.bufferLength, buffer; + var i; + + // special code for z + if (c === Z_LOWER_CHAR) { + buffer = this.ensureBuffer(bufferLength + 4); + for (i = 0; i < 4; ++i) { + buffer[bufferLength + i] = 0; + } + this.bufferLength += 4; + } else { + var input = this.input; + input[0] = c; + for (i = 1; i < 5; ++i) { + c = str.getByte(); + while (Lexer.isSpace(c)) { + c = str.getByte(); + } + + input[i] = c; + + if (c === EOF || c === TILDA_CHAR) { + break; } - p = 0; } - throw new Error('JPX Error: Out of packets'); - }; - } - function PositionComponentResolutionLayerIterator(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var layersCount = tile.codingStyleDefaultParameters.layersCount; - var componentsCount = siz.Csiz; - var precinctsSizes = getPrecinctSizesInImageScale(tile); - var precinctsIterationSizes = precinctsSizes; - var l = 0, r = 0, c = 0, px = 0, py = 0; + buffer = this.ensureBuffer(bufferLength + i - 1); + this.bufferLength += i - 1; - this.nextPacket = function JpxImage_nextPacket() { - // Section B.12.1.4 Position-component-resolution-layer - for (; py < precinctsIterationSizes.maxNumHigh; py++) { - for (; px < precinctsIterationSizes.maxNumWide; px++) { - for (; c < componentsCount; c++) { - var component = tile.components[c]; - var decompositionLevelsCount = - component.codingStyleParameters.decompositionLevelsCount; - for (; r <= decompositionLevelsCount; r++) { - var resolution = component.resolutions[r]; - var sizeInImageScale = - precinctsSizes.components[c].resolutions[r]; - var k = getPrecinctIndexIfExist( - px, - py, - sizeInImageScale, - precinctsIterationSizes, - resolution); - if (k === null) { - continue; - } - for (; l < layersCount;) { - var packet = createPacket(resolution, k, l); - l++; - return packet; - } - l = 0; - } - r = 0; - } - c = 0; + // partial ending; + if (i < 5) { + for (; i < 5; ++i) { + input[i] = 0x21 + 84; } - px = 0; + this.eof = true; } - throw new Error('JPX Error: Out of packets'); - }; + var t = 0; + for (i = 0; i < 5; ++i) { + t = t * 85 + (input[i] - 0x21); + } + + for (i = 3; i >= 0; --i) { + buffer[bufferLength + i] = t & 0xFF; + t >>= 8; + } + } + }; + + return Ascii85Stream; +})(); + +var AsciiHexStream = (function AsciiHexStreamClosure() { + function AsciiHexStream(str, maybeLength) { + this.str = str; + this.dict = str.dict; + + this.firstDigit = -1; + + // Most streams increase in size when decoded, but AsciiHex streams shrink + // by 50%. + if (maybeLength) { + maybeLength = 0.5 * maybeLength; + } + DecodeStream.call(this, maybeLength); } - function ComponentPositionResolutionLayerIterator(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var layersCount = tile.codingStyleDefaultParameters.layersCount; - var componentsCount = siz.Csiz; - var precinctsSizes = getPrecinctSizesInImageScale(tile); - var l = 0, r = 0, c = 0, px = 0, py = 0; - this.nextPacket = function JpxImage_nextPacket() { - // Section B.12.1.5 Component-position-resolution-layer - for (; c < componentsCount; ++c) { - var component = tile.components[c]; - var precinctsIterationSizes = precinctsSizes.components[c]; - var decompositionLevelsCount = - component.codingStyleParameters.decompositionLevelsCount; - for (; py < precinctsIterationSizes.maxNumHigh; py++) { - for (; px < precinctsIterationSizes.maxNumWide; px++) { - for (; r <= decompositionLevelsCount; r++) { - var resolution = component.resolutions[r]; - var sizeInImageScale = precinctsIterationSizes.resolutions[r]; - var k = getPrecinctIndexIfExist( - px, - py, - sizeInImageScale, - precinctsIterationSizes, - resolution); - if (k === null) { - continue; - } - for (; l < layersCount;) { - var packet = createPacket(resolution, k, l); - l++; - return packet; - } - l = 0; - } - r = 0; - } - px = 0; - } - py = 0; + AsciiHexStream.prototype = Object.create(DecodeStream.prototype); + + AsciiHexStream.prototype.readBlock = function AsciiHexStream_readBlock() { + var UPSTREAM_BLOCK_SIZE = 8000; + var bytes = this.str.getBytes(UPSTREAM_BLOCK_SIZE); + if (!bytes.length) { + this.eof = true; + return; + } + + var maxDecodeLength = (bytes.length + 1) >> 1; + var buffer = this.ensureBuffer(this.bufferLength + maxDecodeLength); + var bufferLength = this.bufferLength; + + var firstDigit = this.firstDigit; + for (var i = 0, ii = bytes.length; i < ii; i++) { + var ch = bytes[i], digit; + if (ch >= 0x30 && ch <= 0x39) { // '0'-'9' + digit = ch & 0x0F; + } else if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) { + // 'A'-'Z', 'a'-'z' + digit = (ch & 0x0F) + 9; + } else if (ch === 0x3E) { // '>' + this.eof = true; + break; + } else { // probably whitespace + continue; // ignoring + } + if (firstDigit < 0) { + firstDigit = digit; + } else { + buffer[bufferLength++] = (firstDigit << 4) | digit; + firstDigit = -1; } - throw new Error('JPX Error: Out of packets'); - }; - } - function getPrecinctIndexIfExist( - pxIndex, pyIndex, sizeInImageScale, precinctIterationSizes, resolution) { - var posX = pxIndex * precinctIterationSizes.minWidth; - var posY = pyIndex * precinctIterationSizes.minHeight; - if (posX % sizeInImageScale.width !== 0 || - posY % sizeInImageScale.height !== 0) { - return null; } - var startPrecinctRowIndex = - (posY / sizeInImageScale.width) * - resolution.precinctParameters.numprecinctswide; - return (posX / sizeInImageScale.height) + startPrecinctRowIndex; + if (firstDigit >= 0 && this.eof) { + // incomplete byte + buffer[bufferLength++] = (firstDigit << 4); + firstDigit = -1; + } + this.firstDigit = firstDigit; + this.bufferLength = bufferLength; + }; + + return AsciiHexStream; +})(); + +var RunLengthStream = (function RunLengthStreamClosure() { + function RunLengthStream(str, maybeLength) { + this.str = str; + this.dict = str.dict; + + DecodeStream.call(this, maybeLength); } - function getPrecinctSizesInImageScale(tile) { - var componentsCount = tile.components.length; - var minWidth = Number.MAX_VALUE; - var minHeight = Number.MAX_VALUE; - var maxNumWide = 0; - var maxNumHigh = 0; - var sizePerComponent = new Array(componentsCount); - for (var c = 0; c < componentsCount; c++) { - var component = tile.components[c]; - var decompositionLevelsCount = - component.codingStyleParameters.decompositionLevelsCount; - var sizePerResolution = new Array(decompositionLevelsCount + 1); - var minWidthCurrentComponent = Number.MAX_VALUE; - var minHeightCurrentComponent = Number.MAX_VALUE; - var maxNumWideCurrentComponent = 0; - var maxNumHighCurrentComponent = 0; - var scale = 1; - for (var r = decompositionLevelsCount; r >= 0; --r) { - var resolution = component.resolutions[r]; - var widthCurrentResolution = - scale * resolution.precinctParameters.precinctWidth; - var heightCurrentResolution = - scale * resolution.precinctParameters.precinctHeight; - minWidthCurrentComponent = Math.min( - minWidthCurrentComponent, - widthCurrentResolution); - minHeightCurrentComponent = Math.min( - minHeightCurrentComponent, - heightCurrentResolution); - maxNumWideCurrentComponent = Math.max(maxNumWideCurrentComponent, - resolution.precinctParameters.numprecinctswide); - maxNumHighCurrentComponent = Math.max(maxNumHighCurrentComponent, - resolution.precinctParameters.numprecinctshigh); - sizePerResolution[r] = { - width: widthCurrentResolution, - height: heightCurrentResolution - }; - scale <<= 1; + + RunLengthStream.prototype = Object.create(DecodeStream.prototype); + + RunLengthStream.prototype.readBlock = function RunLengthStream_readBlock() { + // The repeatHeader has following format. The first byte defines type of run + // and amount of bytes to repeat/copy: n = 0 through 127 - copy next n bytes + // (in addition to the second byte from the header), n = 129 through 255 - + // duplicate the second byte from the header (257 - n) times, n = 128 - end. + var repeatHeader = this.str.getBytes(2); + if (!repeatHeader || repeatHeader.length < 2 || repeatHeader[0] === 128) { + this.eof = true; + return; + } + + var buffer; + var bufferLength = this.bufferLength; + var n = repeatHeader[0]; + if (n < 128) { + // copy n bytes + buffer = this.ensureBuffer(bufferLength + n + 1); + buffer[bufferLength++] = repeatHeader[1]; + if (n > 0) { + var source = this.str.getBytes(n); + buffer.set(source, bufferLength); + bufferLength += n; } - minWidth = Math.min(minWidth, minWidthCurrentComponent); - minHeight = Math.min(minHeight, minHeightCurrentComponent); - maxNumWide = Math.max(maxNumWide, maxNumWideCurrentComponent); - maxNumHigh = Math.max(maxNumHigh, maxNumHighCurrentComponent); - sizePerComponent[c] = { - resolutions: sizePerResolution, - minWidth: minWidthCurrentComponent, - minHeight: minHeightCurrentComponent, - maxNumWide: maxNumWideCurrentComponent, - maxNumHigh: maxNumHighCurrentComponent - }; + } else { + n = 257 - n; + var b = repeatHeader[1]; + buffer = this.ensureBuffer(bufferLength + n + 1); + for (var i = 0; i < n; i++) { + buffer[bufferLength++] = b; + } + } + this.bufferLength = bufferLength; + }; + + return RunLengthStream; +})(); + +var CCITTFaxStream = (function CCITTFaxStreamClosure() { + + var ccittEOL = -2; + var twoDimPass = 0; + var twoDimHoriz = 1; + var twoDimVert0 = 2; + var twoDimVertR1 = 3; + var twoDimVertL1 = 4; + var twoDimVertR2 = 5; + var twoDimVertL2 = 6; + var twoDimVertR3 = 7; + var twoDimVertL3 = 8; + + var twoDimTable = [ + [-1, -1], [-1, -1], // 000000x + [7, twoDimVertL3], // 0000010 + [7, twoDimVertR3], // 0000011 + [6, twoDimVertL2], [6, twoDimVertL2], // 000010x + [6, twoDimVertR2], [6, twoDimVertR2], // 000011x + [4, twoDimPass], [4, twoDimPass], // 0001xxx + [4, twoDimPass], [4, twoDimPass], + [4, twoDimPass], [4, twoDimPass], + [4, twoDimPass], [4, twoDimPass], + [3, twoDimHoriz], [3, twoDimHoriz], // 001xxxx + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimHoriz], [3, twoDimHoriz], + [3, twoDimVertL1], [3, twoDimVertL1], // 010xxxx + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertL1], [3, twoDimVertL1], + [3, twoDimVertR1], [3, twoDimVertR1], // 011xxxx + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [3, twoDimVertR1], [3, twoDimVertR1], + [1, twoDimVert0], [1, twoDimVert0], // 1xxxxxx + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0], + [1, twoDimVert0], [1, twoDimVert0] + ]; + + var whiteTable1 = [ + [-1, -1], // 00000 + [12, ccittEOL], // 00001 + [-1, -1], [-1, -1], // 0001x + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 001xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 010xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 011xx + [11, 1792], [11, 1792], // 1000x + [12, 1984], // 10010 + [12, 2048], // 10011 + [12, 2112], // 10100 + [12, 2176], // 10101 + [12, 2240], // 10110 + [12, 2304], // 10111 + [11, 1856], [11, 1856], // 1100x + [11, 1920], [11, 1920], // 1101x + [12, 2368], // 11100 + [12, 2432], // 11101 + [12, 2496], // 11110 + [12, 2560] // 11111 + ]; + + var whiteTable2 = [ + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000000xx + [8, 29], [8, 29], // 00000010x + [8, 30], [8, 30], // 00000011x + [8, 45], [8, 45], // 00000100x + [8, 46], [8, 46], // 00000101x + [7, 22], [7, 22], [7, 22], [7, 22], // 0000011xx + [7, 23], [7, 23], [7, 23], [7, 23], // 0000100xx + [8, 47], [8, 47], // 00001010x + [8, 48], [8, 48], // 00001011x + [6, 13], [6, 13], [6, 13], [6, 13], // 000011xxx + [6, 13], [6, 13], [6, 13], [6, 13], + [7, 20], [7, 20], [7, 20], [7, 20], // 0001000xx + [8, 33], [8, 33], // 00010010x + [8, 34], [8, 34], // 00010011x + [8, 35], [8, 35], // 00010100x + [8, 36], [8, 36], // 00010101x + [8, 37], [8, 37], // 00010110x + [8, 38], [8, 38], // 00010111x + [7, 19], [7, 19], [7, 19], [7, 19], // 0001100xx + [8, 31], [8, 31], // 00011010x + [8, 32], [8, 32], // 00011011x + [6, 1], [6, 1], [6, 1], [6, 1], // 000111xxx + [6, 1], [6, 1], [6, 1], [6, 1], + [6, 12], [6, 12], [6, 12], [6, 12], // 001000xxx + [6, 12], [6, 12], [6, 12], [6, 12], + [8, 53], [8, 53], // 00100100x + [8, 54], [8, 54], // 00100101x + [7, 26], [7, 26], [7, 26], [7, 26], // 0010011xx + [8, 39], [8, 39], // 00101000x + [8, 40], [8, 40], // 00101001x + [8, 41], [8, 41], // 00101010x + [8, 42], [8, 42], // 00101011x + [8, 43], [8, 43], // 00101100x + [8, 44], [8, 44], // 00101101x + [7, 21], [7, 21], [7, 21], [7, 21], // 0010111xx + [7, 28], [7, 28], [7, 28], [7, 28], // 0011000xx + [8, 61], [8, 61], // 00110010x + [8, 62], [8, 62], // 00110011x + [8, 63], [8, 63], // 00110100x + [8, 0], [8, 0], // 00110101x + [8, 320], [8, 320], // 00110110x + [8, 384], [8, 384], // 00110111x + [5, 10], [5, 10], [5, 10], [5, 10], // 00111xxxx + [5, 10], [5, 10], [5, 10], [5, 10], + [5, 10], [5, 10], [5, 10], [5, 10], + [5, 10], [5, 10], [5, 10], [5, 10], + [5, 11], [5, 11], [5, 11], [5, 11], // 01000xxxx + [5, 11], [5, 11], [5, 11], [5, 11], + [5, 11], [5, 11], [5, 11], [5, 11], + [5, 11], [5, 11], [5, 11], [5, 11], + [7, 27], [7, 27], [7, 27], [7, 27], // 0100100xx + [8, 59], [8, 59], // 01001010x + [8, 60], [8, 60], // 01001011x + [9, 1472], // 010011000 + [9, 1536], // 010011001 + [9, 1600], // 010011010 + [9, 1728], // 010011011 + [7, 18], [7, 18], [7, 18], [7, 18], // 0100111xx + [7, 24], [7, 24], [7, 24], [7, 24], // 0101000xx + [8, 49], [8, 49], // 01010010x + [8, 50], [8, 50], // 01010011x + [8, 51], [8, 51], // 01010100x + [8, 52], [8, 52], // 01010101x + [7, 25], [7, 25], [7, 25], [7, 25], // 0101011xx + [8, 55], [8, 55], // 01011000x + [8, 56], [8, 56], // 01011001x + [8, 57], [8, 57], // 01011010x + [8, 58], [8, 58], // 01011011x + [6, 192], [6, 192], [6, 192], [6, 192], // 010111xxx + [6, 192], [6, 192], [6, 192], [6, 192], + [6, 1664], [6, 1664], [6, 1664], [6, 1664], // 011000xxx + [6, 1664], [6, 1664], [6, 1664], [6, 1664], + [8, 448], [8, 448], // 01100100x + [8, 512], [8, 512], // 01100101x + [9, 704], // 011001100 + [9, 768], // 011001101 + [8, 640], [8, 640], // 01100111x + [8, 576], [8, 576], // 01101000x + [9, 832], // 011010010 + [9, 896], // 011010011 + [9, 960], // 011010100 + [9, 1024], // 011010101 + [9, 1088], // 011010110 + [9, 1152], // 011010111 + [9, 1216], // 011011000 + [9, 1280], // 011011001 + [9, 1344], // 011011010 + [9, 1408], // 011011011 + [7, 256], [7, 256], [7, 256], [7, 256], // 0110111xx + [4, 2], [4, 2], [4, 2], [4, 2], // 0111xxxxx + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 2], [4, 2], [4, 2], [4, 2], + [4, 3], [4, 3], [4, 3], [4, 3], // 1000xxxxx + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [4, 3], [4, 3], [4, 3], [4, 3], + [5, 128], [5, 128], [5, 128], [5, 128], // 10010xxxx + [5, 128], [5, 128], [5, 128], [5, 128], + [5, 128], [5, 128], [5, 128], [5, 128], + [5, 128], [5, 128], [5, 128], [5, 128], + [5, 8], [5, 8], [5, 8], [5, 8], // 10011xxxx + [5, 8], [5, 8], [5, 8], [5, 8], + [5, 8], [5, 8], [5, 8], [5, 8], + [5, 8], [5, 8], [5, 8], [5, 8], + [5, 9], [5, 9], [5, 9], [5, 9], // 10100xxxx + [5, 9], [5, 9], [5, 9], [5, 9], + [5, 9], [5, 9], [5, 9], [5, 9], + [5, 9], [5, 9], [5, 9], [5, 9], + [6, 16], [6, 16], [6, 16], [6, 16], // 101010xxx + [6, 16], [6, 16], [6, 16], [6, 16], + [6, 17], [6, 17], [6, 17], [6, 17], // 101011xxx + [6, 17], [6, 17], [6, 17], [6, 17], + [4, 4], [4, 4], [4, 4], [4, 4], // 1011xxxxx + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 4], [4, 4], [4, 4], [4, 4], + [4, 5], [4, 5], [4, 5], [4, 5], // 1100xxxxx + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [4, 5], [4, 5], [4, 5], [4, 5], + [6, 14], [6, 14], [6, 14], [6, 14], // 110100xxx + [6, 14], [6, 14], [6, 14], [6, 14], + [6, 15], [6, 15], [6, 15], [6, 15], // 110101xxx + [6, 15], [6, 15], [6, 15], [6, 15], + [5, 64], [5, 64], [5, 64], [5, 64], // 11011xxxx + [5, 64], [5, 64], [5, 64], [5, 64], + [5, 64], [5, 64], [5, 64], [5, 64], + [5, 64], [5, 64], [5, 64], [5, 64], + [4, 6], [4, 6], [4, 6], [4, 6], // 1110xxxxx + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 6], [4, 6], [4, 6], [4, 6], + [4, 7], [4, 7], [4, 7], [4, 7], // 1111xxxxx + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7], + [4, 7], [4, 7], [4, 7], [4, 7] + ]; + + var blackTable1 = [ + [-1, -1], [-1, -1], // 000000000000x + [12, ccittEOL], [12, ccittEOL], // 000000000001x + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000001xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000010xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000011xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000100xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000101xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000110xx + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000111xx + [11, 1792], [11, 1792], [11, 1792], [11, 1792], // 00000001000xx + [12, 1984], [12, 1984], // 000000010010x + [12, 2048], [12, 2048], // 000000010011x + [12, 2112], [12, 2112], // 000000010100x + [12, 2176], [12, 2176], // 000000010101x + [12, 2240], [12, 2240], // 000000010110x + [12, 2304], [12, 2304], // 000000010111x + [11, 1856], [11, 1856], [11, 1856], [11, 1856], // 00000001100xx + [11, 1920], [11, 1920], [11, 1920], [11, 1920], // 00000001101xx + [12, 2368], [12, 2368], // 000000011100x + [12, 2432], [12, 2432], // 000000011101x + [12, 2496], [12, 2496], // 000000011110x + [12, 2560], [12, 2560], // 000000011111x + [10, 18], [10, 18], [10, 18], [10, 18], // 0000001000xxx + [10, 18], [10, 18], [10, 18], [10, 18], + [12, 52], [12, 52], // 000000100100x + [13, 640], // 0000001001010 + [13, 704], // 0000001001011 + [13, 768], // 0000001001100 + [13, 832], // 0000001001101 + [12, 55], [12, 55], // 000000100111x + [12, 56], [12, 56], // 000000101000x + [13, 1280], // 0000001010010 + [13, 1344], // 0000001010011 + [13, 1408], // 0000001010100 + [13, 1472], // 0000001010101 + [12, 59], [12, 59], // 000000101011x + [12, 60], [12, 60], // 000000101100x + [13, 1536], // 0000001011010 + [13, 1600], // 0000001011011 + [11, 24], [11, 24], [11, 24], [11, 24], // 00000010111xx + [11, 25], [11, 25], [11, 25], [11, 25], // 00000011000xx + [13, 1664], // 0000001100100 + [13, 1728], // 0000001100101 + [12, 320], [12, 320], // 000000110011x + [12, 384], [12, 384], // 000000110100x + [12, 448], [12, 448], // 000000110101x + [13, 512], // 0000001101100 + [13, 576], // 0000001101101 + [12, 53], [12, 53], // 000000110111x + [12, 54], [12, 54], // 000000111000x + [13, 896], // 0000001110010 + [13, 960], // 0000001110011 + [13, 1024], // 0000001110100 + [13, 1088], // 0000001110101 + [13, 1152], // 0000001110110 + [13, 1216], // 0000001110111 + [10, 64], [10, 64], [10, 64], [10, 64], // 0000001111xxx + [10, 64], [10, 64], [10, 64], [10, 64] + ]; + + var blackTable2 = [ + [8, 13], [8, 13], [8, 13], [8, 13], // 00000100xxxx + [8, 13], [8, 13], [8, 13], [8, 13], + [8, 13], [8, 13], [8, 13], [8, 13], + [8, 13], [8, 13], [8, 13], [8, 13], + [11, 23], [11, 23], // 00000101000x + [12, 50], // 000001010010 + [12, 51], // 000001010011 + [12, 44], // 000001010100 + [12, 45], // 000001010101 + [12, 46], // 000001010110 + [12, 47], // 000001010111 + [12, 57], // 000001011000 + [12, 58], // 000001011001 + [12, 61], // 000001011010 + [12, 256], // 000001011011 + [10, 16], [10, 16], [10, 16], [10, 16], // 0000010111xx + [10, 17], [10, 17], [10, 17], [10, 17], // 0000011000xx + [12, 48], // 000001100100 + [12, 49], // 000001100101 + [12, 62], // 000001100110 + [12, 63], // 000001100111 + [12, 30], // 000001101000 + [12, 31], // 000001101001 + [12, 32], // 000001101010 + [12, 33], // 000001101011 + [12, 40], // 000001101100 + [12, 41], // 000001101101 + [11, 22], [11, 22], // 00000110111x + [8, 14], [8, 14], [8, 14], [8, 14], // 00000111xxxx + [8, 14], [8, 14], [8, 14], [8, 14], + [8, 14], [8, 14], [8, 14], [8, 14], + [8, 14], [8, 14], [8, 14], [8, 14], + [7, 10], [7, 10], [7, 10], [7, 10], // 0000100xxxxx + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 10], [7, 10], [7, 10], [7, 10], + [7, 11], [7, 11], [7, 11], [7, 11], // 0000101xxxxx + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [7, 11], [7, 11], [7, 11], [7, 11], + [9, 15], [9, 15], [9, 15], [9, 15], // 000011000xxx + [9, 15], [9, 15], [9, 15], [9, 15], + [12, 128], // 000011001000 + [12, 192], // 000011001001 + [12, 26], // 000011001010 + [12, 27], // 000011001011 + [12, 28], // 000011001100 + [12, 29], // 000011001101 + [11, 19], [11, 19], // 00001100111x + [11, 20], [11, 20], // 00001101000x + [12, 34], // 000011010010 + [12, 35], // 000011010011 + [12, 36], // 000011010100 + [12, 37], // 000011010101 + [12, 38], // 000011010110 + [12, 39], // 000011010111 + [11, 21], [11, 21], // 00001101100x + [12, 42], // 000011011010 + [12, 43], // 000011011011 + [10, 0], [10, 0], [10, 0], [10, 0], // 0000110111xx + [7, 12], [7, 12], [7, 12], [7, 12], // 0000111xxxxx + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12], + [7, 12], [7, 12], [7, 12], [7, 12] + ]; + + var blackTable3 = [ + [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000xx + [6, 9], // 000100 + [6, 8], // 000101 + [5, 7], [5, 7], // 00011x + [4, 6], [4, 6], [4, 6], [4, 6], // 0010xx + [4, 5], [4, 5], [4, 5], [4, 5], // 0011xx + [3, 1], [3, 1], [3, 1], [3, 1], // 010xxx + [3, 1], [3, 1], [3, 1], [3, 1], + [3, 4], [3, 4], [3, 4], [3, 4], // 011xxx + [3, 4], [3, 4], [3, 4], [3, 4], + [2, 3], [2, 3], [2, 3], [2, 3], // 10xxxx + [2, 3], [2, 3], [2, 3], [2, 3], + [2, 3], [2, 3], [2, 3], [2, 3], + [2, 3], [2, 3], [2, 3], [2, 3], + [2, 2], [2, 2], [2, 2], [2, 2], // 11xxxx + [2, 2], [2, 2], [2, 2], [2, 2], + [2, 2], [2, 2], [2, 2], [2, 2], + [2, 2], [2, 2], [2, 2], [2, 2] + ]; + + function CCITTFaxStream(str, maybeLength, params) { + this.str = str; + this.dict = str.dict; + + params = params || Dict.empty; + + this.encoding = params.get('K') || 0; + this.eoline = params.get('EndOfLine') || false; + this.byteAlign = params.get('EncodedByteAlign') || false; + this.columns = params.get('Columns') || 1728; + this.rows = params.get('Rows') || 0; + var eoblock = params.get('EndOfBlock'); + if (eoblock === null || eoblock === undefined) { + eoblock = true; } - return { - components: sizePerComponent, - minWidth: minWidth, - minHeight: minHeight, - maxNumWide: maxNumWide, - maxNumHigh: maxNumHigh - }; - } - function buildPackets(context) { - var siz = context.SIZ; - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var componentsCount = siz.Csiz; - // Creating resolutions and sub-bands for each component - for (var c = 0; c < componentsCount; c++) { - var component = tile.components[c]; - var decompositionLevelsCount = - component.codingStyleParameters.decompositionLevelsCount; - // Section B.5 Resolution levels and sub-bands - var resolutions = []; - var subbands = []; - for (var r = 0; r <= decompositionLevelsCount; r++) { - var blocksDimensions = getBlocksDimensions(context, component, r); - var resolution = {}; - var scale = 1 << (decompositionLevelsCount - r); - resolution.trx0 = Math.ceil(component.tcx0 / scale); - resolution.try0 = Math.ceil(component.tcy0 / scale); - resolution.trx1 = Math.ceil(component.tcx1 / scale); - resolution.try1 = Math.ceil(component.tcy1 / scale); - resolution.resLevel = r; - buildPrecincts(context, resolution, blocksDimensions); - resolutions.push(resolution); + this.eoblock = eoblock; + this.black = params.get('BlackIs1') || false; - var subband; - if (r === 0) { - // one sub-band (LL) with last decomposition - subband = {}; - subband.type = 'LL'; - subband.tbx0 = Math.ceil(component.tcx0 / scale); - subband.tby0 = Math.ceil(component.tcy0 / scale); - subband.tbx1 = Math.ceil(component.tcx1 / scale); - subband.tby1 = Math.ceil(component.tcy1 / scale); - subband.resolution = resolution; - buildCodeblocks(context, subband, blocksDimensions); - subbands.push(subband); - resolution.subbands = [subband]; - } else { - var bscale = 1 << (decompositionLevelsCount - r + 1); - var resolutionSubbands = []; - // three sub-bands (HL, LH and HH) with rest of decompositions - subband = {}; - subband.type = 'HL'; - subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5); - subband.tby0 = Math.ceil(component.tcy0 / bscale); - subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5); - subband.tby1 = Math.ceil(component.tcy1 / bscale); - subband.resolution = resolution; - buildCodeblocks(context, subband, blocksDimensions); - subbands.push(subband); - resolutionSubbands.push(subband); + this.codingLine = new Uint32Array(this.columns + 1); + this.refLine = new Uint32Array(this.columns + 2); - subband = {}; - subband.type = 'LH'; - subband.tbx0 = Math.ceil(component.tcx0 / bscale); - subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5); - subband.tbx1 = Math.ceil(component.tcx1 / bscale); - subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5); - subband.resolution = resolution; - buildCodeblocks(context, subband, blocksDimensions); - subbands.push(subband); - resolutionSubbands.push(subband); + this.codingLine[0] = this.columns; + this.codingPos = 0; - subband = {}; - subband.type = 'HH'; - subband.tbx0 = Math.ceil(component.tcx0 / bscale - 0.5); - subband.tby0 = Math.ceil(component.tcy0 / bscale - 0.5); - subband.tbx1 = Math.ceil(component.tcx1 / bscale - 0.5); - subband.tby1 = Math.ceil(component.tcy1 / bscale - 0.5); - subband.resolution = resolution; - buildCodeblocks(context, subband, blocksDimensions); - subbands.push(subband); - resolutionSubbands.push(subband); + this.row = 0; + this.nextLine2D = this.encoding < 0; + this.inputBits = 0; + this.inputBuf = 0; + this.outputBits = 0; - resolution.subbands = resolutionSubbands; - } - } - component.resolutions = resolutions; - component.subbands = subbands; + var code1; + while ((code1 = this.lookBits(12)) === 0) { + this.eatBits(1); } - // Generate the packets sequence - var progressionOrder = tile.codingStyleDefaultParameters.progressionOrder; - switch (progressionOrder) { - case 0: - tile.packetsIterator = - new LayerResolutionComponentPositionIterator(context); - break; - case 1: - tile.packetsIterator = - new ResolutionLayerComponentPositionIterator(context); - break; - case 2: - tile.packetsIterator = - new ResolutionPositionComponentLayerIterator(context); - break; - case 3: - tile.packetsIterator = - new PositionComponentResolutionLayerIterator(context); - break; - case 4: - tile.packetsIterator = - new ComponentPositionResolutionLayerIterator(context); - break; - default: - throw new Error('JPX Error: Unsupported progression order ' + - progressionOrder); + if (code1 === 1) { + this.eatBits(12); + } + if (this.encoding > 0) { + this.nextLine2D = !this.lookBits(1); + this.eatBits(1); } + + DecodeStream.call(this, maybeLength); } - function parseTilePackets(context, data, offset, dataLength) { - var position = 0; - var buffer, bufferSize = 0, skipNextBit = false; - function readBits(count) { - while (bufferSize < count) { - var b = data[offset + position]; - position++; - if (skipNextBit) { - buffer = (buffer << 7) | b; - bufferSize += 7; - skipNextBit = false; - } else { - buffer = (buffer << 8) | b; - bufferSize += 8; - } - if (b === 0xFF) { - skipNextBit = true; - } - } - bufferSize -= count; - return (buffer >>> bufferSize) & ((1 << count) - 1); + + CCITTFaxStream.prototype = Object.create(DecodeStream.prototype); + + CCITTFaxStream.prototype.readBlock = function CCITTFaxStream_readBlock() { + while (!this.eof) { + var c = this.lookChar(); + this.ensureBuffer(this.bufferLength + 1); + this.buffer[this.bufferLength++] = c; } - function skipMarkerIfEqual(value) { - if (data[offset + position - 1] === 0xFF && - data[offset + position] === value) { - skipBytes(1); - return true; - } else if (data[offset + position] === 0xFF && - data[offset + position + 1] === value) { - skipBytes(2); - return true; + }; + + CCITTFaxStream.prototype.addPixels = + function ccittFaxStreamAddPixels(a1, blackPixels) { + var codingLine = this.codingLine; + var codingPos = this.codingPos; + + if (a1 > codingLine[codingPos]) { + if (a1 > this.columns) { + info('row is wrong length'); + this.err = true; + a1 = this.columns; } - return false; - } - function skipBytes(count) { - position += count; - } - function alignToByte() { - bufferSize = 0; - if (skipNextBit) { - position++; - skipNextBit = false; + if ((codingPos & 1) ^ blackPixels) { + ++codingPos; } + + codingLine[codingPos] = a1; } - function readCodingpasses() { - if (readBits(1) === 0) { - return 1; + this.codingPos = codingPos; + }; + + CCITTFaxStream.prototype.addPixelsNeg = + function ccittFaxStreamAddPixelsNeg(a1, blackPixels) { + var codingLine = this.codingLine; + var codingPos = this.codingPos; + + if (a1 > codingLine[codingPos]) { + if (a1 > this.columns) { + info('row is wrong length'); + this.err = true; + a1 = this.columns; } - if (readBits(1) === 0) { - return 2; + if ((codingPos & 1) ^ blackPixels) { + ++codingPos; } - var value = readBits(2); - if (value < 3) { - return value + 3; + + codingLine[codingPos] = a1; + } else if (a1 < codingLine[codingPos]) { + if (a1 < 0) { + info('invalid code'); + this.err = true; + a1 = 0; } - value = readBits(5); - if (value < 31) { - return value + 6; + while (codingPos > 0 && a1 < codingLine[codingPos - 1]) { + --codingPos; } - value = readBits(7); - return value + 37; + codingLine[codingPos] = a1; } - var tileIndex = context.currentTile.index; - var tile = context.tiles[tileIndex]; - var sopMarkerUsed = context.COD.sopMarkerUsed; - var ephMarkerUsed = context.COD.ephMarkerUsed; - var packetsIterator = tile.packetsIterator; - while (position < dataLength) { - alignToByte(); - if (sopMarkerUsed && skipMarkerIfEqual(0x91)) { - // Skip also marker segment length and packet sequence ID - skipBytes(4); - } - var packet = packetsIterator.nextPacket(); - if (!readBits(1)) { - continue; + + this.codingPos = codingPos; + }; + + CCITTFaxStream.prototype.lookChar = function CCITTFaxStream_lookChar() { + var refLine = this.refLine; + var codingLine = this.codingLine; + var columns = this.columns; + + var refPos, blackPixels, bits, i; + + if (this.outputBits === 0) { + if (this.eof) { + return null; } - var layerNumber = packet.layerNumber; - var queue = [], codeblock; - for (var i = 0, ii = packet.codeblocks.length; i < ii; i++) { - codeblock = packet.codeblocks[i]; - var precinct = codeblock.precinct; - var codeblockColumn = codeblock.cbx - precinct.cbxMin; - var codeblockRow = codeblock.cby - precinct.cbyMin; - var codeblockIncluded = false; - var firstTimeInclusion = false; - var valueReady; - if (codeblock['included'] !== undefined) { - codeblockIncluded = !!readBits(1); - } else { - // reading inclusion tree - precinct = codeblock.precinct; - var inclusionTree, zeroBitPlanesTree; - if (precinct['inclusionTree'] !== undefined) { - inclusionTree = precinct.inclusionTree; + this.err = false; + + var code1, code2, code3; + if (this.nextLine2D) { + for (i = 0; codingLine[i] < columns; ++i) { + refLine[i] = codingLine[i]; + } + refLine[i++] = columns; + refLine[i] = columns; + codingLine[0] = 0; + this.codingPos = 0; + refPos = 0; + blackPixels = 0; + + while (codingLine[this.codingPos] < columns) { + code1 = this.getTwoDimCode(); + switch (code1) { + case twoDimPass: + this.addPixels(refLine[refPos + 1], blackPixels); + if (refLine[refPos + 1] < columns) { + refPos += 2; + } + break; + case twoDimHoriz: + code1 = code2 = 0; + if (blackPixels) { + do { + code1 += (code3 = this.getBlackCode()); + } while (code3 >= 64); + do { + code2 += (code3 = this.getWhiteCode()); + } while (code3 >= 64); + } else { + do { + code1 += (code3 = this.getWhiteCode()); + } while (code3 >= 64); + do { + code2 += (code3 = this.getBlackCode()); + } while (code3 >= 64); + } + this.addPixels(codingLine[this.codingPos] + + code1, blackPixels); + if (codingLine[this.codingPos] < columns) { + this.addPixels(codingLine[this.codingPos] + code2, + blackPixels ^ 1); + } + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + break; + case twoDimVertR3: + this.addPixels(refLine[refPos] + 3, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + ++refPos; + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVertR2: + this.addPixels(refLine[refPos] + 2, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + ++refPos; + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVertR1: + this.addPixels(refLine[refPos] + 1, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + ++refPos; + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVert0: + this.addPixels(refLine[refPos], blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + ++refPos; + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVertL3: + this.addPixelsNeg(refLine[refPos] - 3, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + if (refPos > 0) { + --refPos; + } else { + ++refPos; + } + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVertL2: + this.addPixelsNeg(refLine[refPos] - 2, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + if (refPos > 0) { + --refPos; + } else { + ++refPos; + } + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case twoDimVertL1: + this.addPixelsNeg(refLine[refPos] - 1, blackPixels); + blackPixels ^= 1; + if (codingLine[this.codingPos] < columns) { + if (refPos > 0) { + --refPos; + } else { + ++refPos; + } + while (refLine[refPos] <= codingLine[this.codingPos] && + refLine[refPos] < columns) { + refPos += 2; + } + } + break; + case EOF: + this.addPixels(columns, 0); + this.eof = true; + break; + default: + info('bad 2d code'); + this.addPixels(columns, 0); + this.err = true; + } + } + } else { + codingLine[0] = 0; + this.codingPos = 0; + blackPixels = 0; + while (codingLine[this.codingPos] < columns) { + code1 = 0; + if (blackPixels) { + do { + code1 += (code3 = this.getBlackCode()); + } while (code3 >= 64); } else { - // building inclusion and zero bit-planes trees - var width = precinct.cbxMax - precinct.cbxMin + 1; - var height = precinct.cbyMax - precinct.cbyMin + 1; - inclusionTree = new InclusionTree(width, height, layerNumber); - zeroBitPlanesTree = new TagTree(width, height); - precinct.inclusionTree = inclusionTree; - precinct.zeroBitPlanesTree = zeroBitPlanesTree; + do { + code1 += (code3 = this.getWhiteCode()); + } while (code3 >= 64); } + this.addPixels(codingLine[this.codingPos] + code1, blackPixels); + blackPixels ^= 1; + } + } - if (inclusionTree.reset(codeblockColumn, codeblockRow, layerNumber)) { - while (true) { - if (readBits(1)) { - valueReady = !inclusionTree.nextLevel(); - if (valueReady) { - codeblock.included = true; - codeblockIncluded = firstTimeInclusion = true; - break; - } - } else { - inclusionTree.incrementValue(layerNumber); - break; - } - } + var gotEOL = false; + + if (this.byteAlign) { + this.inputBits &= ~7; + } + + if (!this.eoblock && this.row === this.rows - 1) { + this.eof = true; + } else { + code1 = this.lookBits(12); + if (this.eoline) { + while (code1 !== EOF && code1 !== 1) { + this.eatBits(1); + code1 = this.lookBits(12); + } + } else { + while (code1 === 0) { + this.eatBits(1); + code1 = this.lookBits(12); } } - if (!codeblockIncluded) { - continue; + if (code1 === 1) { + this.eatBits(12); + gotEOL = true; + } else if (code1 === EOF) { + this.eof = true; } - if (firstTimeInclusion) { - zeroBitPlanesTree = precinct.zeroBitPlanesTree; - zeroBitPlanesTree.reset(codeblockColumn, codeblockRow); - while (true) { - if (readBits(1)) { - valueReady = !zeroBitPlanesTree.nextLevel(); - if (valueReady) { - break; + } + + if (!this.eof && this.encoding > 0) { + this.nextLine2D = !this.lookBits(1); + this.eatBits(1); + } + + if (this.eoblock && gotEOL && this.byteAlign) { + code1 = this.lookBits(12); + if (code1 === 1) { + this.eatBits(12); + if (this.encoding > 0) { + this.lookBits(1); + this.eatBits(1); + } + if (this.encoding >= 0) { + for (i = 0; i < 4; ++i) { + code1 = this.lookBits(12); + if (code1 !== 1) { + info('bad rtc code: ' + code1); + } + this.eatBits(12); + if (this.encoding > 0) { + this.lookBits(1); + this.eatBits(1); } - } else { - zeroBitPlanesTree.incrementValue(); } } - codeblock.zeroBitPlanes = zeroBitPlanesTree.value; + this.eof = true; } - var codingpasses = readCodingpasses(); - while (readBits(1)) { - codeblock.Lblock++; + } else if (this.err && this.eoline) { + while (true) { + code1 = this.lookBits(13); + if (code1 === EOF) { + this.eof = true; + return null; + } + if ((code1 >> 1) === 1) { + break; + } + this.eatBits(1); } - var codingpassesLog2 = log2(codingpasses); - // rounding down log2 - var bits = ((codingpasses < (1 << codingpassesLog2)) ? - codingpassesLog2 - 1 : codingpassesLog2) + codeblock.Lblock; - var codedDataLength = readBits(bits); - queue.push({ - codeblock: codeblock, - codingpasses: codingpasses, - dataLength: codedDataLength - }); - } - alignToByte(); - if (ephMarkerUsed) { - skipMarkerIfEqual(0x92); - } - while (queue.length > 0) { - var packetItem = queue.shift(); - codeblock = packetItem.codeblock; - if (codeblock['data'] === undefined) { - codeblock.data = []; + this.eatBits(12); + if (this.encoding > 0) { + this.eatBits(1); + this.nextLine2D = !(code1 & 1); } - codeblock.data.push({ - data: data, - start: offset + position, - end: offset + position + packetItem.dataLength, - codingpasses: packetItem.codingpasses - }); - position += packetItem.dataLength; } - } - return position; - } - function copyCoefficients(coefficients, levelWidth, levelHeight, subband, - delta, mb, reversible, segmentationSymbolUsed) { - var x0 = subband.tbx0; - var y0 = subband.tby0; - var width = subband.tbx1 - subband.tbx0; - var codeblocks = subband.codeblocks; - var right = subband.type.charAt(0) === 'H' ? 1 : 0; - var bottom = subband.type.charAt(1) === 'H' ? levelWidth : 0; - for (var i = 0, ii = codeblocks.length; i < ii; ++i) { - var codeblock = codeblocks[i]; - var blockWidth = codeblock.tbx1_ - codeblock.tbx0_; - var blockHeight = codeblock.tby1_ - codeblock.tby0_; - if (blockWidth === 0 || blockHeight === 0) { - continue; + if (codingLine[0] > 0) { + this.outputBits = codingLine[this.codingPos = 0]; + } else { + this.outputBits = codingLine[this.codingPos = 1]; } - if (codeblock['data'] === undefined) { - continue; + this.row++; + } + + var c; + if (this.outputBits >= 8) { + c = (this.codingPos & 1) ? 0 : 0xFF; + this.outputBits -= 8; + if (this.outputBits === 0 && codingLine[this.codingPos] < columns) { + this.codingPos++; + this.outputBits = (codingLine[this.codingPos] - + codingLine[this.codingPos - 1]); } + } else { + bits = 8; + c = 0; + do { + if (this.outputBits > bits) { + c <<= bits; + if (!(this.codingPos & 1)) { + c |= 0xFF >> (8 - bits); + } + this.outputBits -= bits; + bits = 0; + } else { + c <<= this.outputBits; + if (!(this.codingPos & 1)) { + c |= 0xFF >> (8 - this.outputBits); + } + bits -= this.outputBits; + this.outputBits = 0; + if (codingLine[this.codingPos] < columns) { + this.codingPos++; + this.outputBits = (codingLine[this.codingPos] - + codingLine[this.codingPos - 1]); + } else if (bits > 0) { + c <<= bits; + bits = 0; + } + } + } while (bits); + } + if (this.black) { + c ^= 0xFF; + } + return c; + }; - var bitModel, currentCodingpassType; - bitModel = new BitModel(blockWidth, blockHeight, codeblock.subbandType, - codeblock.zeroBitPlanes, mb); - currentCodingpassType = 2; // first bit plane starts from cleanup + // This functions returns the code found from the table. + // The start and end parameters set the boundaries for searching the table. + // The limit parameter is optional. Function returns an array with three + // values. The first array element indicates whether a valid code is being + // returned. The second array element is the actual code. The third array + // element indicates whether EOF was reached. + CCITTFaxStream.prototype.findTableCode = + function ccittFaxStreamFindTableCode(start, end, table, limit) { - // collect data - var data = codeblock.data, totalLength = 0, codingpasses = 0; - var j, jj, dataItem; - for (j = 0, jj = data.length; j < jj; j++) { - dataItem = data[j]; - totalLength += dataItem.end - dataItem.start; - codingpasses += dataItem.codingpasses; - } - var encodedData = new Uint8Array(totalLength); - var position = 0; - for (j = 0, jj = data.length; j < jj; j++) { - dataItem = data[j]; - var chunk = dataItem.data.subarray(dataItem.start, dataItem.end); - encodedData.set(chunk, position); - position += chunk.length; + var limitValue = limit || 0; + for (var i = start; i <= end; ++i) { + var code = this.lookBits(i); + if (code === EOF) { + return [true, 1, false]; } - // decoding the item - var decoder = new ArithmeticDecoder(encodedData, 0, totalLength); - bitModel.setDecoder(decoder); - - for (j = 0; j < codingpasses; j++) { - switch (currentCodingpassType) { - case 0: - bitModel.runSignificancePropogationPass(); - break; - case 1: - bitModel.runMagnitudeRefinementPass(); - break; - case 2: - bitModel.runCleanupPass(); - if (segmentationSymbolUsed) { - bitModel.checkSegmentationSymbol(); - } - break; - } - currentCodingpassType = (currentCodingpassType + 1) % 3; + if (i < end) { + code <<= end - i; } - - var offset = (codeblock.tbx0_ - x0) + (codeblock.tby0_ - y0) * width; - var sign = bitModel.coefficentsSign; - var magnitude = bitModel.coefficentsMagnitude; - var bitsDecoded = bitModel.bitsDecoded; - var magnitudeCorrection = reversible ? 0 : 0.5; - var k, n, nb; - position = 0; - // Do the interleaving of Section F.3.3 here, so we do not need - // to copy later. LL level is not interleaved, just copied. - var interleave = (subband.type !== 'LL'); - for (j = 0; j < blockHeight; j++) { - var row = (offset / width) | 0; // row in the non-interleaved subband - var levelOffset = 2 * row * (levelWidth - width) + right + bottom; - for (k = 0; k < blockWidth; k++) { - n = magnitude[position]; - if (n !== 0) { - n = (n + magnitudeCorrection) * delta; - if (sign[position] !== 0) { - n = -n; - } - nb = bitsDecoded[position]; - var pos = interleave ? (levelOffset + (offset << 1)) : offset; - if (reversible && (nb >= mb)) { - coefficients[pos] = n; - } else { - coefficients[pos] = n * (1 << (mb - nb)); - } - } - offset++; - position++; + if (!limitValue || code >= limitValue) { + var p = table[code - limitValue]; + if (p[0] === i) { + this.eatBits(i); + return [true, p[1], true]; } - offset += width - blockWidth; } } - } - function transformTile(context, tile, c) { - var component = tile.components[c]; - var codingStyleParameters = component.codingStyleParameters; - var quantizationParameters = component.quantizationParameters; - var decompositionLevelsCount = - codingStyleParameters.decompositionLevelsCount; - var spqcds = quantizationParameters.SPqcds; - var scalarExpounded = quantizationParameters.scalarExpounded; - var guardBits = quantizationParameters.guardBits; - var segmentationSymbolUsed = codingStyleParameters.segmentationSymbolUsed; - var precision = context.components[c].precision; - - var reversible = codingStyleParameters.reversibleTransformation; - var transform = (reversible ? new ReversibleTransform() : - new IrreversibleTransform()); + return [false, 0, false]; + }; - var subbandCoefficients = []; - var b = 0; - for (var i = 0; i <= decompositionLevelsCount; i++) { - var resolution = component.resolutions[i]; + CCITTFaxStream.prototype.getTwoDimCode = + function ccittFaxStreamGetTwoDimCode() { - var width = resolution.trx1 - resolution.trx0; - var height = resolution.try1 - resolution.try0; - // Allocate space for the whole sublevel. - var coefficients = new Float32Array(width * height); + var code = 0; + var p; + if (this.eoblock) { + code = this.lookBits(7); + p = twoDimTable[code]; + if (p && p[0] > 0) { + this.eatBits(p[0]); + return p[1]; + } + } else { + var result = this.findTableCode(1, 7, twoDimTable); + if (result[0] && result[2]) { + return result[1]; + } + } + info('Bad two dim code'); + return EOF; + }; - for (var j = 0, jj = resolution.subbands.length; j < jj; j++) { - var mu, epsilon; - if (!scalarExpounded) { - // formula E-5 - mu = spqcds[0].mu; - epsilon = spqcds[0].epsilon + (i > 0 ? 1 - i : 0); - } else { - mu = spqcds[b].mu; - epsilon = spqcds[b].epsilon; - b++; - } + CCITTFaxStream.prototype.getWhiteCode = + function ccittFaxStreamGetWhiteCode() { - var subband = resolution.subbands[j]; - var gainLog2 = SubbandsGainLog2[subband.type]; + var code = 0; + var p; + if (this.eoblock) { + code = this.lookBits(12); + if (code === EOF) { + return 1; + } - // calulate quantization coefficient (Section E.1.1.1) - var delta = (reversible ? 1 : - Math.pow(2, precision + gainLog2 - epsilon) * (1 + mu / 2048)); - var mb = (guardBits + epsilon - 1); + if ((code >> 5) === 0) { + p = whiteTable1[code]; + } else { + p = whiteTable2[code >> 3]; + } - // In the first resolution level, copyCoefficients will fill the - // whole array with coefficients. In the succeding passes, - // copyCoefficients will consecutively fill in the values that belong - // to the interleaved positions of the HL, LH, and HH coefficients. - // The LL coefficients will then be interleaved in Transform.iterate(). - copyCoefficients(coefficients, width, height, subband, delta, mb, - reversible, segmentationSymbolUsed); + if (p[0] > 0) { + this.eatBits(p[0]); + return p[1]; + } + } else { + var result = this.findTableCode(1, 9, whiteTable2); + if (result[0]) { + return result[1]; } - subbandCoefficients.push({ - width: width, - height: height, - items: coefficients - }); - } - var result = transform.calculate(subbandCoefficients, - component.tcx0, component.tcy0); - return { - left: component.tcx0, - top: component.tcy0, - width: result.width, - height: result.height, - items: result.items - }; - } - function transformComponents(context) { - var siz = context.SIZ; - var components = context.components; - var componentsCount = siz.Csiz; - var resultImages = []; - for (var i = 0, ii = context.tiles.length; i < ii; i++) { - var tile = context.tiles[i]; - var transformedTiles = []; - var c; - for (c = 0; c < componentsCount; c++) { - transformedTiles[c] = transformTile(context, tile, c); + result = this.findTableCode(11, 12, whiteTable1); + if (result[0]) { + return result[1]; } - var tile0 = transformedTiles[0]; - var out = new Uint8Array(tile0.items.length * componentsCount); - var result = { - left: tile0.left, - top: tile0.top, - width: tile0.width, - height: tile0.height, - items: out - }; + } + info('bad white code'); + this.eatBits(1); + return 1; + }; - // Section G.2.2 Inverse multi component transform - var shift, offset, max, min, maxK; - var pos = 0, j, jj, y0, y1, y2, r, g, b, k, val; - if (tile.codingStyleDefaultParameters.multipleComponentTransform) { - var fourComponents = componentsCount === 4; - var y0items = transformedTiles[0].items; - var y1items = transformedTiles[1].items; - var y2items = transformedTiles[2].items; - var y3items = fourComponents ? transformedTiles[3].items : null; + CCITTFaxStream.prototype.getBlackCode = + function ccittFaxStreamGetBlackCode() { - // HACK: The multiple component transform formulas below assume that - // all components have the same precision. With this in mind, we - // compute shift and offset only once. - shift = components[0].precision - 8; - offset = (128 << shift) + 0.5; - max = 255 * (1 << shift); - maxK = max * 0.5; - min = -maxK; + var code, p; + if (this.eoblock) { + code = this.lookBits(13); + if (code === EOF) { + return 1; + } + if ((code >> 7) === 0) { + p = blackTable1[code]; + } else if ((code >> 9) === 0 && (code >> 7) !== 0) { + p = blackTable2[(code >> 1) - 64]; + } else { + p = blackTable3[code >> 7]; + } - var component0 = tile.components[0]; - var alpha01 = componentsCount - 3; - jj = y0items.length; - if (!component0.codingStyleParameters.reversibleTransformation) { - // inverse irreversible multiple component transform - for (j = 0; j < jj; j++, pos += alpha01) { - y0 = y0items[j] + offset; - y1 = y1items[j]; - y2 = y2items[j]; - r = y0 + 1.402 * y2; - g = y0 - 0.34413 * y1 - 0.71414 * y2; - b = y0 + 1.772 * y1; - out[pos++] = r <= 0 ? 0 : r >= max ? 255 : r >> shift; - out[pos++] = g <= 0 ? 0 : g >= max ? 255 : g >> shift; - out[pos++] = b <= 0 ? 0 : b >= max ? 255 : b >> shift; - } - } else { - // inverse reversible multiple component transform - for (j = 0; j < jj; j++, pos += alpha01) { - y0 = y0items[j] + offset; - y1 = y1items[j]; - y2 = y2items[j]; - g = y0 - ((y2 + y1) >> 2); - r = g + y2; - b = g + y1; - out[pos++] = r <= 0 ? 0 : r >= max ? 255 : r >> shift; - out[pos++] = g <= 0 ? 0 : g >= max ? 255 : g >> shift; - out[pos++] = b <= 0 ? 0 : b >= max ? 255 : b >> shift; - } - } - if (fourComponents) { - for (j = 0, pos = 3; j < jj; j++, pos += 4) { - k = y3items[j]; - out[pos] = k <= min ? 0 : k >= maxK ? 255 : (k + offset) >> shift; - } - } - } else { // no multi-component transform - for (c = 0; c < componentsCount; c++) { - var items = transformedTiles[c].items; - shift = components[c].precision - 8; - offset = (128 << shift) + 0.5; - max = (127.5 * (1 << shift)); - min = -max; - for (pos = c, j = 0, jj = items.length; j < jj; j++) { - val = items[j]; - out[pos] = val <= min ? 0 : - val >= max ? 255 : (val + offset) >> shift; - pos += componentsCount; - } + if (p[0] > 0) { + this.eatBits(p[0]); + return p[1]; + } + } else { + var result = this.findTableCode(2, 6, blackTable3); + if (result[0]) { + return result[1]; + } + + result = this.findTableCode(7, 12, blackTable2, 64); + if (result[0]) { + return result[1]; + } + + result = this.findTableCode(10, 13, blackTable1); + if (result[0]) { + return result[1]; + } + } + info('bad black code'); + this.eatBits(1); + return 1; + }; + + CCITTFaxStream.prototype.lookBits = function CCITTFaxStream_lookBits(n) { + var c; + while (this.inputBits < n) { + if ((c = this.str.getByte()) === -1) { + if (this.inputBits === 0) { + return EOF; } + return ((this.inputBuf << (n - this.inputBits)) & + (0xFFFF >> (16 - n))); } - resultImages.push(result); + this.inputBuf = (this.inputBuf << 8) + c; + this.inputBits += 8; } - return resultImages; - } - function initializeTile(context, tileIndex) { - var siz = context.SIZ; - var componentsCount = siz.Csiz; - var tile = context.tiles[tileIndex]; - for (var c = 0; c < componentsCount; c++) { - var component = tile.components[c]; - var qcdOrQcc = (context.currentTile.QCC[c] !== undefined ? - context.currentTile.QCC[c] : context.currentTile.QCD); - component.quantizationParameters = qcdOrQcc; - var codOrCoc = (context.currentTile.COC[c] !== undefined ? - context.currentTile.COC[c] : context.currentTile.COD); - component.codingStyleParameters = codOrCoc; + return (this.inputBuf >> (this.inputBits - n)) & (0xFFFF >> (16 - n)); + }; + + CCITTFaxStream.prototype.eatBits = function CCITTFaxStream_eatBits(n) { + if ((this.inputBits -= n) < 0) { + this.inputBits = 0; } - tile.codingStyleDefaultParameters = context.currentTile.COD; + }; + + return CCITTFaxStream; +})(); + +var LZWStream = (function LZWStreamClosure() { + function LZWStream(str, maybeLength, earlyChange) { + this.str = str; + this.dict = str.dict; + this.cachedData = 0; + this.bitsCached = 0; + + var maxLzwDictionarySize = 4096; + var lzwState = { + earlyChange: earlyChange, + codeLength: 9, + nextCode: 258, + dictionaryValues: new Uint8Array(maxLzwDictionarySize), + dictionaryLengths: new Uint16Array(maxLzwDictionarySize), + dictionaryPrevCodes: new Uint16Array(maxLzwDictionarySize), + currentSequence: new Uint8Array(maxLzwDictionarySize), + currentSequenceLength: 0 + }; + for (var i = 0; i < 256; ++i) { + lzwState.dictionaryValues[i] = i; + lzwState.dictionaryLengths[i] = 1; + } + this.lzwState = lzwState; + + DecodeStream.call(this, maybeLength); } - // Section B.10.2 Tag trees - var TagTree = (function TagTreeClosure() { - function TagTree(width, height) { - var levelsLength = log2(Math.max(width, height)) + 1; - this.levels = []; - for (var i = 0; i < levelsLength; i++) { - var level = { - width: width, - height: height, - items: [] - }; - this.levels.push(level); - width = Math.ceil(width / 2); - height = Math.ceil(height / 2); + LZWStream.prototype = Object.create(DecodeStream.prototype); + + LZWStream.prototype.readBits = function LZWStream_readBits(n) { + var bitsCached = this.bitsCached; + var cachedData = this.cachedData; + while (bitsCached < n) { + var c = this.str.getByte(); + if (c === -1) { + this.eof = true; + return null; } + cachedData = (cachedData << 8) | c; + bitsCached += 8; } - TagTree.prototype = { - reset: function TagTree_reset(i, j) { - var currentLevel = 0, value = 0, level; - while (currentLevel < this.levels.length) { - level = this.levels[currentLevel]; - var index = i + j * level.width; - if (level.items[index] !== undefined) { - value = level.items[index]; - break; - } - level.index = index; - i >>= 1; - j >>= 1; - currentLevel++; - } - currentLevel--; - level = this.levels[currentLevel]; - level.items[level.index] = value; - this.currentLevel = currentLevel; - delete this.value; - }, - incrementValue: function TagTree_incrementValue() { - var level = this.levels[this.currentLevel]; - level.items[level.index]++; - }, - nextLevel: function TagTree_nextLevel() { - var currentLevel = this.currentLevel; - var level = this.levels[currentLevel]; - var value = level.items[level.index]; - currentLevel--; - if (currentLevel < 0) { - this.value = value; - return false; - } + this.bitsCached = (bitsCached -= n); + this.cachedData = cachedData; + this.lastCode = null; + return (cachedData >>> bitsCached) & ((1 << n) - 1); + }; - this.currentLevel = currentLevel; - level = this.levels[currentLevel]; - level.items[level.index] = value; - return true; - } - }; - return TagTree; - })(); + LZWStream.prototype.readBlock = function LZWStream_readBlock() { + var blockSize = 512; + var estimatedDecodedSize = blockSize * 2, decodedSizeDelta = blockSize; + var i, j, q; - var InclusionTree = (function InclusionTreeClosure() { - function InclusionTree(width, height, defaultValue) { - var levelsLength = log2(Math.max(width, height)) + 1; - this.levels = []; - for (var i = 0; i < levelsLength; i++) { - var items = new Uint8Array(width * height); - for (var j = 0, jj = items.length; j < jj; j++) { - items[j] = defaultValue; + var lzwState = this.lzwState; + if (!lzwState) { + return; // eof was found + } + + var earlyChange = lzwState.earlyChange; + var nextCode = lzwState.nextCode; + var dictionaryValues = lzwState.dictionaryValues; + var dictionaryLengths = lzwState.dictionaryLengths; + var dictionaryPrevCodes = lzwState.dictionaryPrevCodes; + var codeLength = lzwState.codeLength; + var prevCode = lzwState.prevCode; + var currentSequence = lzwState.currentSequence; + var currentSequenceLength = lzwState.currentSequenceLength; + + var decodedLength = 0; + var currentBufferLength = this.bufferLength; + var buffer = this.ensureBuffer(this.bufferLength + estimatedDecodedSize); + + for (i = 0; i < blockSize; i++) { + var code = this.readBits(codeLength); + var hasPrev = currentSequenceLength > 0; + if (code < 256) { + currentSequence[0] = code; + currentSequenceLength = 1; + } else if (code >= 258) { + if (code < nextCode) { + currentSequenceLength = dictionaryLengths[code]; + for (j = currentSequenceLength - 1, q = code; j >= 0; j--) { + currentSequence[j] = dictionaryValues[q]; + q = dictionaryPrevCodes[q]; + } + } else { + currentSequence[currentSequenceLength++] = currentSequence[0]; } + } else if (code === 256) { + codeLength = 9; + nextCode = 258; + currentSequenceLength = 0; + continue; + } else { + this.eof = true; + delete this.lzwState; + break; + } - var level = { - width: width, - height: height, - items: items - }; - this.levels.push(level); + if (hasPrev) { + dictionaryPrevCodes[nextCode] = prevCode; + dictionaryLengths[nextCode] = dictionaryLengths[prevCode] + 1; + dictionaryValues[nextCode] = currentSequence[0]; + nextCode++; + codeLength = (nextCode + earlyChange) & (nextCode + earlyChange - 1) ? + codeLength : Math.min(Math.log(nextCode + earlyChange) / + 0.6931471805599453 + 1, 12) | 0; + } + prevCode = code; - width = Math.ceil(width / 2); - height = Math.ceil(height / 2); + decodedLength += currentSequenceLength; + if (estimatedDecodedSize < decodedLength) { + do { + estimatedDecodedSize += decodedSizeDelta; + } while (estimatedDecodedSize < decodedLength); + buffer = this.ensureBuffer(this.bufferLength + estimatedDecodedSize); + } + for (j = 0; j < currentSequenceLength; j++) { + buffer[currentBufferLength++] = currentSequence[j]; } } - InclusionTree.prototype = { - reset: function InclusionTree_reset(i, j, stopValue) { - var currentLevel = 0; - while (currentLevel < this.levels.length) { - var level = this.levels[currentLevel]; - var index = i + j * level.width; - level.index = index; - var value = level.items[index]; + lzwState.nextCode = nextCode; + lzwState.codeLength = codeLength; + lzwState.prevCode = prevCode; + lzwState.currentSequenceLength = currentSequenceLength; - if (value === 0xFF) { - break; - } + this.bufferLength = currentBufferLength; + }; - if (value > stopValue) { - this.currentLevel = currentLevel; - // already know about this one, propagating the value to top levels - this.propagateValues(); - return false; - } + return LZWStream; +})(); - i >>= 1; - j >>= 1; - currentLevel++; - } - this.currentLevel = currentLevel - 1; - return true; - }, - incrementValue: function InclusionTree_incrementValue(stopValue) { - var level = this.levels[this.currentLevel]; - level.items[level.index] = stopValue + 1; - this.propagateValues(); - }, - propagateValues: function InclusionTree_propagateValues() { - var levelIndex = this.currentLevel; - var level = this.levels[levelIndex]; - var currentValue = level.items[level.index]; - while (--levelIndex >= 0) { - level = this.levels[levelIndex]; - level.items[level.index] = currentValue; - } - }, - nextLevel: function InclusionTree_nextLevel() { - var currentLevel = this.currentLevel; - var level = this.levels[currentLevel]; - var value = level.items[level.index]; - level.items[level.index] = 0xFF; - currentLevel--; - if (currentLevel < 0) { - return false; - } +var NullStream = (function NullStreamClosure() { + function NullStream() { + Stream.call(this, new Uint8Array(0)); + } - this.currentLevel = currentLevel; - level = this.levels[currentLevel]; - level.items[level.index] = value; - return true; - } - }; - return InclusionTree; - })(); + NullStream.prototype = Stream.prototype; - // Section D. Coefficient bit modeling - var BitModel = (function BitModelClosure() { - var UNIFORM_CONTEXT = 17; - var RUNLENGTH_CONTEXT = 18; - // Table D-1 - // The index is binary presentation: 0dddvvhh, ddd - sum of Di (0..4), - // vv - sum of Vi (0..2), and hh - sum of Hi (0..2) - var LLAndLHContextsLabel = new Uint8Array([ - 0, 5, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 1, 6, 8, 0, 3, 7, 8, 0, 4, - 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, - 8, 0, 3, 7, 8, 0, 4, 7, 8, 0, 0, 0, 0, 0, 2, 6, 8, 0, 3, 7, 8, 0, 4, 7, 8 - ]); - var HLContextLabel = new Uint8Array([ - 0, 3, 4, 0, 5, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 1, 3, 4, 0, 6, 7, 7, 0, 8, - 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, - 4, 0, 6, 7, 7, 0, 8, 8, 8, 0, 0, 0, 0, 0, 2, 3, 4, 0, 6, 7, 7, 0, 8, 8, 8 - ]); - var HHContextLabel = new Uint8Array([ - 0, 1, 2, 0, 1, 2, 2, 0, 2, 2, 2, 0, 0, 0, 0, 0, 3, 4, 5, 0, 4, 5, 5, 0, 5, - 5, 5, 0, 0, 0, 0, 0, 6, 7, 7, 0, 7, 7, 7, 0, 7, 7, 7, 0, 0, 0, 0, 0, 8, 8, - 8, 0, 8, 8, 8, 0, 8, 8, 8, 0, 0, 0, 0, 0, 8, 8, 8, 0, 8, 8, 8, 0, 8, 8, 8 - ]); + return NullStream; +})(); - function BitModel(width, height, subband, zeroBitPlanes, mb) { - this.width = width; - this.height = height; +// TODO refactor to remove dependency on parser.js +function _setCoreParser(coreParser_) { + coreParser = coreParser_; + EOF = coreParser_.EOF; + Lexer = coreParser_.Lexer; +} +exports._setCoreParser = _setCoreParser; - this.contextLabelTable = (subband === 'HH' ? HHContextLabel : - (subband === 'HL' ? HLContextLabel : LLAndLHContextsLabel)); +// TODO refactor to remove dependency on colorspace.js +function _setCoreColorSpace(coreColorSpace_) { + coreColorSpace = coreColorSpace_; + ColorSpace = coreColorSpace_.ColorSpace; +} +exports._setCoreColorSpace = _setCoreColorSpace; - var coefficientCount = width * height; +exports.Ascii85Stream = Ascii85Stream; +exports.AsciiHexStream = AsciiHexStream; +exports.CCITTFaxStream = CCITTFaxStream; +exports.DecryptStream = DecryptStream; +exports.DecodeStream = DecodeStream; +exports.FlateStream = FlateStream; +exports.Jbig2Stream = Jbig2Stream; +exports.JpegStream = JpegStream; +exports.JpxStream = JpxStream; +exports.NullStream = NullStream; +exports.PredictorStream = PredictorStream; +exports.RunLengthStream = RunLengthStream; +exports.Stream = Stream; +exports.StreamsSequenceStream = StreamsSequenceStream; +exports.StringStream = StringStream; +exports.LZWStream = LZWStream; +})); - // coefficients outside the encoding region treated as insignificant - // add border state cells for significanceState - this.neighborsSignificance = new Uint8Array(coefficientCount); - this.coefficentsSign = new Uint8Array(coefficientCount); - this.coefficentsMagnitude = mb > 14 ? new Uint32Array(coefficientCount) : - mb > 6 ? new Uint16Array(coefficientCount) : - new Uint8Array(coefficientCount); - this.processingFlags = new Uint8Array(coefficientCount); - var bitsDecoded = new Uint8Array(coefficientCount); - if (zeroBitPlanes !== 0) { - for (var i = 0; i < coefficientCount; i++) { - bitsDecoded[i] = zeroBitPlanes; - } - } - this.bitsDecoded = bitsDecoded; +(function (root, factory) { + { + factory((root.pdfjsDisplayPatternHelper = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayWebGL); + } +}(this, function (exports, sharedUtil, displayWebGL) { - this.reset(); - } +var Util = sharedUtil.Util; +var info = sharedUtil.info; +var isArray = sharedUtil.isArray; +var error = sharedUtil.error; +var WebGLUtils = displayWebGL.WebGLUtils; - BitModel.prototype = { - setDecoder: function BitModel_setDecoder(decoder) { - this.decoder = decoder; - }, - reset: function BitModel_reset() { - // We have 17 contexts that are accessed via context labels, - // plus the uniform and runlength context. - this.contexts = new Int8Array(19); +var ShadingIRs = {}; - // Contexts are packed into 1 byte: - // highest 7 bits carry the index, lowest bit carries mps - this.contexts[0] = (4 << 1) | 0; - this.contexts[UNIFORM_CONTEXT] = (46 << 1) | 0; - this.contexts[RUNLENGTH_CONTEXT] = (3 << 1) | 0; - }, - setNeighborsSignificance: - function BitModel_setNeighborsSignificance(row, column, index) { - var neighborsSignificance = this.neighborsSignificance; - var width = this.width, height = this.height; - var left = (column > 0); - var right = (column + 1 < width); - var i; +ShadingIRs.RadialAxial = { + fromIR: function RadialAxial_fromIR(raw) { + var type = raw[1]; + var colorStops = raw[2]; + var p0 = raw[3]; + var p1 = raw[4]; + var r0 = raw[5]; + var r1 = raw[6]; + return { + type: 'Pattern', + getPattern: function RadialAxial_getPattern(ctx) { + var grad; + if (type === 'axial') { + grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); + } else if (type === 'radial') { + grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); + } - if (row > 0) { - i = index - width; - if (left) { - neighborsSignificance[i - 1] += 0x10; - } - if (right) { - neighborsSignificance[i + 1] += 0x10; - } - neighborsSignificance[i] += 0x04; + for (var i = 0, ii = colorStops.length; i < ii; ++i) { + var c = colorStops[i]; + grad.addColorStop(c[0], c[1]); } + return grad; + } + }; + } +}; + +var createMeshCanvas = (function createMeshCanvasClosure() { + function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { + // Very basic Gouraud-shaded triangle rasterization algorithm. + var coords = context.coords, colors = context.colors; + var bytes = data.data, rowSize = data.width * 4; + var tmp; + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + if (coords[p2 + 1] > coords[p3 + 1]) { + tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; + } + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + var x1 = (coords[p1] + context.offsetX) * context.scaleX; + var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; + var x2 = (coords[p2] + context.offsetX) * context.scaleX; + var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; + var x3 = (coords[p3] + context.offsetX) * context.scaleX; + var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; + if (y1 >= y3) { + return; + } + var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; + var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; + var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; + + var minY = Math.round(y1), maxY = Math.round(y3); + var xa, car, cag, cab; + var xb, cbr, cbg, cbb; + var k; + for (var y = minY; y <= maxY; y++) { + if (y < y2) { + k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); + xa = x1 - (x1 - x2) * k; + car = c1r - (c1r - c2r) * k; + cag = c1g - (c1g - c2g) * k; + cab = c1b - (c1b - c2b) * k; + } else { + k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); + xa = x2 - (x2 - x3) * k; + car = c2r - (c2r - c3r) * k; + cag = c2g - (c2g - c3g) * k; + cab = c2b - (c2b - c3b) * k; + } + k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); + xb = x1 - (x1 - x3) * k; + cbr = c1r - (c1r - c3r) * k; + cbg = c1g - (c1g - c3g) * k; + cbb = c1b - (c1b - c3b) * k; + var x1_ = Math.round(Math.min(xa, xb)); + var x2_ = Math.round(Math.max(xa, xb)); + var j = rowSize * y + x1_ * 4; + for (var x = x1_; x <= x2_; x++) { + k = (xa - x) / (xa - xb); + k = k < 0 ? 0 : k > 1 ? 1 : k; + bytes[j++] = (car - (car - cbr) * k) | 0; + bytes[j++] = (cag - (cag - cbg) * k) | 0; + bytes[j++] = (cab - (cab - cbb) * k) | 0; + bytes[j++] = 255; + } + } + } - if (row + 1 < height) { - i = index + width; - if (left) { - neighborsSignificance[i - 1] += 0x10; - } - if (right) { - neighborsSignificance[i + 1] += 0x10; + function drawFigure(data, figure, context) { + var ps = figure.coords; + var cs = figure.colors; + var i, ii; + switch (figure.type) { + case 'lattice': + var verticesPerRow = figure.verticesPerRow; + var rows = Math.floor(ps.length / verticesPerRow) - 1; + var cols = verticesPerRow - 1; + for (i = 0; i < rows; i++) { + var q = i * verticesPerRow; + for (var j = 0; j < cols; j++, q++) { + drawTriangle(data, context, + ps[q], ps[q + 1], ps[q + verticesPerRow], + cs[q], cs[q + 1], cs[q + verticesPerRow]); + drawTriangle(data, context, + ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], + cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); } - neighborsSignificance[i] += 0x04; - } - - if (left) { - neighborsSignificance[index - 1] += 0x01; } - if (right) { - neighborsSignificance[index + 1] += 0x01; + break; + case 'triangles': + for (i = 0, ii = ps.length; i < ii; i += 3) { + drawTriangle(data, context, + ps[i], ps[i + 1], ps[i + 2], + cs[i], cs[i + 1], cs[i + 2]); } - neighborsSignificance[index] |= 0x80; - }, - runSignificancePropogationPass: - function BitModel_runSignificancePropogationPass() { - var decoder = this.decoder; - var width = this.width, height = this.height; - var coefficentsMagnitude = this.coefficentsMagnitude; - var coefficentsSign = this.coefficentsSign; - var neighborsSignificance = this.neighborsSignificance; - var processingFlags = this.processingFlags; - var contexts = this.contexts; - var labels = this.contextLabelTable; - var bitsDecoded = this.bitsDecoded; - var processedInverseMask = ~1; - var processedMask = 1; - var firstMagnitudeBitMask = 2; + break; + default: + error('illigal figure'); + break; + } + } - for (var i0 = 0; i0 < height; i0 += 4) { - for (var j = 0; j < width; j++) { - var index = i0 * width + j; - for (var i1 = 0; i1 < 4; i1++, index += width) { - var i = i0 + i1; - if (i >= height) { - break; - } - // clear processed flag first - processingFlags[index] &= processedInverseMask; + function createMeshCanvas(bounds, combinesScale, coords, colors, figures, + backgroundColor, cachedCanvases) { + // we will increase scale on some weird factor to let antialiasing take + // care of "rough" edges + var EXPECTED_SCALE = 1.1; + // MAX_PATTERN_SIZE is used to avoid OOM situation. + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - if (coefficentsMagnitude[index] || - !neighborsSignificance[index]) { - continue; - } + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var boundsWidth = Math.ceil(bounds[2]) - offsetX; + var boundsHeight = Math.ceil(bounds[3]) - offsetY; - var contextLabel = labels[neighborsSignificance[index]]; - var decision = decoder.readBit(contexts, contextLabel); - if (decision) { - var sign = this.decodeSignBit(i, j, index); - coefficentsSign[index] = sign; - coefficentsMagnitude[index] = 1; - this.setNeighborsSignificance(i, j, index); - processingFlags[index] |= firstMagnitudeBitMask; - } - bitsDecoded[index]++; - processingFlags[index] |= processedMask; - } - } - } - }, - decodeSignBit: function BitModel_decodeSignBit(row, column, index) { - var width = this.width, height = this.height; - var coefficentsMagnitude = this.coefficentsMagnitude; - var coefficentsSign = this.coefficentsSign; - var contribution, sign0, sign1, significance1; - var contextLabel, decoded; + var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var scaleX = boundsWidth / width; + var scaleY = boundsHeight / height; - // calculate horizontal contribution - significance1 = (column > 0 && coefficentsMagnitude[index - 1] !== 0); - if (column + 1 < width && coefficentsMagnitude[index + 1] !== 0) { - sign1 = coefficentsSign[index + 1]; - if (significance1) { - sign0 = coefficentsSign[index - 1]; - contribution = 1 - sign1 - sign0; - } else { - contribution = 1 - sign1 - sign1; - } - } else if (significance1) { - sign0 = coefficentsSign[index - 1]; - contribution = 1 - sign0 - sign0; - } else { - contribution = 0; - } - var horizontalContribution = 3 * contribution; + var context = { + coords: coords, + colors: colors, + offsetX: -offsetX, + offsetY: -offsetY, + scaleX: 1 / scaleX, + scaleY: 1 / scaleY + }; - // calculate vertical contribution and combine with the horizontal - significance1 = (row > 0 && coefficentsMagnitude[index - width] !== 0); - if (row + 1 < height && coefficentsMagnitude[index + width] !== 0) { - sign1 = coefficentsSign[index + width]; - if (significance1) { - sign0 = coefficentsSign[index - width]; - contribution = 1 - sign1 - sign0 + horizontalContribution; - } else { - contribution = 1 - sign1 - sign1 + horizontalContribution; - } - } else if (significance1) { - sign0 = coefficentsSign[index - width]; - contribution = 1 - sign0 - sign0 + horizontalContribution; - } else { - contribution = horizontalContribution; + var canvas, tmpCanvas, i, ii; + if (WebGLUtils.isEnabled) { + canvas = WebGLUtils.drawFigures(width, height, backgroundColor, + figures, context); + + // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 + tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); + tmpCanvas.context.drawImage(canvas, 0, 0); + canvas = tmpCanvas.canvas; + } else { + tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); + var tmpCtx = tmpCanvas.context; + + var data = tmpCtx.createImageData(width, height); + if (backgroundColor) { + var bytes = data.data; + for (i = 0, ii = bytes.length; i < ii; i += 4) { + bytes[i] = backgroundColor[0]; + bytes[i + 1] = backgroundColor[1]; + bytes[i + 2] = backgroundColor[2]; + bytes[i + 3] = 255; } + } + for (i = 0; i < figures.length; i++) { + drawFigure(data, figures[i], context); + } + tmpCtx.putImageData(data, 0, 0); + canvas = tmpCanvas.canvas; + } - if (contribution >= 0) { - contextLabel = 9 + contribution; - decoded = this.decoder.readBit(this.contexts, contextLabel); + return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, + scaleX: scaleX, scaleY: scaleY}; + } + return createMeshCanvas; +})(); + +ShadingIRs.Mesh = { + fromIR: function Mesh_fromIR(raw) { + //var type = raw[1]; + var coords = raw[2]; + var colors = raw[3]; + var figures = raw[4]; + var bounds = raw[5]; + var matrix = raw[6]; + //var bbox = raw[7]; + var background = raw[8]; + return { + type: 'Pattern', + getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { + var scale; + if (shadingFill) { + scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform); } else { - contextLabel = 9 - contribution; - decoded = this.decoder.readBit(this.contexts, contextLabel) ^ 1; + // Obtain scale from matrix and current transformation matrix. + scale = Util.singularValueDecompose2dScale(owner.baseTransform); + if (matrix) { + var matrixScale = Util.singularValueDecompose2dScale(matrix); + scale = [scale[0] * matrixScale[0], + scale[1] * matrixScale[1]]; + } } - return decoded; - }, - runMagnitudeRefinementPass: - function BitModel_runMagnitudeRefinementPass() { - var decoder = this.decoder; - var width = this.width, height = this.height; - var coefficentsMagnitude = this.coefficentsMagnitude; - var neighborsSignificance = this.neighborsSignificance; - var contexts = this.contexts; - var bitsDecoded = this.bitsDecoded; - var processingFlags = this.processingFlags; - var processedMask = 1; - var firstMagnitudeBitMask = 2; - var length = width * height; - var width4 = width * 4; - - for (var index0 = 0, indexNext; index0 < length; index0 = indexNext) { - indexNext = Math.min(length, index0 + width4); - for (var j = 0; j < width; j++) { - for (var index = index0 + j; index < indexNext; index += width) { - // significant but not those that have just become - if (!coefficentsMagnitude[index] || - (processingFlags[index] & processedMask) !== 0) { - continue; - } - var contextLabel = 16; - if ((processingFlags[index] & firstMagnitudeBitMask) !== 0) { - processingFlags[index] ^= firstMagnitudeBitMask; - // first refinement - var significance = neighborsSignificance[index] & 127; - contextLabel = significance === 0 ? 15 : 14; - } + // Rasterizing on the main thread since sending/queue large canvases + // might cause OOM. + var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, + colors, figures, shadingFill ? null : background, + owner.cachedCanvases); - var bit = decoder.readBit(contexts, contextLabel); - coefficentsMagnitude[index] = - (coefficentsMagnitude[index] << 1) | bit; - bitsDecoded[index]++; - processingFlags[index] |= processedMask; - } + if (!shadingFill) { + ctx.setTransform.apply(ctx, owner.baseTransform); + if (matrix) { + ctx.transform.apply(ctx, matrix); } } - }, - runCleanupPass: function BitModel_runCleanupPass() { - var decoder = this.decoder; - var width = this.width, height = this.height; - var neighborsSignificance = this.neighborsSignificance; - var coefficentsMagnitude = this.coefficentsMagnitude; - var coefficentsSign = this.coefficentsSign; - var contexts = this.contexts; - var labels = this.contextLabelTable; - var bitsDecoded = this.bitsDecoded; - var processingFlags = this.processingFlags; - var processedMask = 1; - var firstMagnitudeBitMask = 2; - var oneRowDown = width; - var twoRowsDown = width * 2; - var threeRowsDown = width * 3; - var iNext; - for (var i0 = 0; i0 < height; i0 = iNext) { - iNext = Math.min(i0 + 4, height); - var indexBase = i0 * width; - var checkAllEmpty = i0 + 3 < height; - for (var j = 0; j < width; j++) { - var index0 = indexBase + j; - // using the property: labels[neighborsSignificance[index]] === 0 - // when neighborsSignificance[index] === 0 - var allEmpty = (checkAllEmpty && - processingFlags[index0] === 0 && - processingFlags[index0 + oneRowDown] === 0 && - processingFlags[index0 + twoRowsDown] === 0 && - processingFlags[index0 + threeRowsDown] === 0 && - neighborsSignificance[index0] === 0 && - neighborsSignificance[index0 + oneRowDown] === 0 && - neighborsSignificance[index0 + twoRowsDown] === 0 && - neighborsSignificance[index0 + threeRowsDown] === 0); - var i1 = 0, index = index0; - var i = i0, sign; - if (allEmpty) { - var hasSignificantCoefficent = - decoder.readBit(contexts, RUNLENGTH_CONTEXT); - if (!hasSignificantCoefficent) { - bitsDecoded[index0]++; - bitsDecoded[index0 + oneRowDown]++; - bitsDecoded[index0 + twoRowsDown]++; - bitsDecoded[index0 + threeRowsDown]++; - continue; // next column - } - i1 = (decoder.readBit(contexts, UNIFORM_CONTEXT) << 1) | - decoder.readBit(contexts, UNIFORM_CONTEXT); - if (i1 !== 0) { - i = i0 + i1; - index += i1 * width; - } - - sign = this.decodeSignBit(i, j, index); - coefficentsSign[index] = sign; - coefficentsMagnitude[index] = 1; - this.setNeighborsSignificance(i, j, index); - processingFlags[index] |= firstMagnitudeBitMask; - index = index0; - for (var i2 = i0; i2 <= i; i2++, index += width) { - bitsDecoded[index]++; - } + ctx.translate(temporaryPatternCanvas.offsetX, + temporaryPatternCanvas.offsetY); + ctx.scale(temporaryPatternCanvas.scaleX, + temporaryPatternCanvas.scaleY); - i1++; - } - for (i = i0 + i1; i < iNext; i++, index += width) { - if (coefficentsMagnitude[index] || - (processingFlags[index] & processedMask) !== 0) { - continue; - } + return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); + } + }; + } +}; - var contextLabel = labels[neighborsSignificance[index]]; - var decision = decoder.readBit(contexts, contextLabel); - if (decision === 1) { - sign = this.decodeSignBit(i, j, index); - coefficentsSign[index] = sign; - coefficentsMagnitude[index] = 1; - this.setNeighborsSignificance(i, j, index); - processingFlags[index] |= firstMagnitudeBitMask; - } - bitsDecoded[index]++; - } - } - } - }, - checkSegmentationSymbol: function BitModel_checkSegmentationSymbol() { - var decoder = this.decoder; - var contexts = this.contexts; - var symbol = (decoder.readBit(contexts, UNIFORM_CONTEXT) << 3) | - (decoder.readBit(contexts, UNIFORM_CONTEXT) << 2) | - (decoder.readBit(contexts, UNIFORM_CONTEXT) << 1) | - decoder.readBit(contexts, UNIFORM_CONTEXT); - if (symbol !== 0xA) { - throw new Error('JPX Error: Invalid segmentation symbol'); - } +ShadingIRs.Dummy = { + fromIR: function Dummy_fromIR() { + return { + type: 'Pattern', + getPattern: function Dummy_fromIR_getPattern() { + return 'hotpink'; } }; + } +}; - return BitModel; - })(); +function getShadingPatternFromIR(raw) { + var shadingIR = ShadingIRs[raw[0]]; + if (!shadingIR) { + error('Unknown IR type: ' + raw[0]); + } + return shadingIR.fromIR(raw); +} - // Section F, Discrete wavelet transformation - var Transform = (function TransformClosure() { - function Transform() {} +var TilingPattern = (function TilingPatternClosure() { + var PaintType = { + COLORED: 1, + UNCOLORED: 2 + }; - Transform.prototype.calculate = - function transformCalculate(subbands, u0, v0) { - var ll = subbands[0]; - for (var i = 1, ii = subbands.length; i < ii; i++) { - ll = this.iterate(ll, subbands[i], u0, v0); - } - return ll; - }; - Transform.prototype.extend = function extend(buffer, offset, size) { - // Section F.3.7 extending... using max extension of 4 - var i1 = offset - 1, j1 = offset + 1; - var i2 = offset + size - 2, j2 = offset + size; - buffer[i1--] = buffer[j1++]; - buffer[j2++] = buffer[i2--]; - buffer[i1--] = buffer[j1++]; - buffer[j2++] = buffer[i2--]; - buffer[i1--] = buffer[j1++]; - buffer[j2++] = buffer[i2--]; - buffer[i1] = buffer[j1]; - buffer[j2] = buffer[i2]; - }; - Transform.prototype.iterate = function Transform_iterate(ll, hl_lh_hh, - u0, v0) { - var llWidth = ll.width, llHeight = ll.height, llItems = ll.items; - var width = hl_lh_hh.width; - var height = hl_lh_hh.height; - var items = hl_lh_hh.items; - var i, j, k, l, u, v; + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - // Interleave LL according to Section F.3.3 - for (k = 0, i = 0; i < llHeight; i++) { - l = i * 2 * width; - for (j = 0; j < llWidth; j++, k++, l += 2) { - items[l] = llItems[k]; - } - } - // The LL band is not needed anymore. - llItems = ll.items = null; + function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) { + this.operatorList = IR[2]; + this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; + this.bbox = IR[4]; + this.xstep = IR[5]; + this.ystep = IR[6]; + this.paintType = IR[7]; + this.tilingType = IR[8]; + this.color = color; + this.canvasGraphicsFactory = canvasGraphicsFactory; + this.baseTransform = baseTransform; + this.type = 'Pattern'; + this.ctx = ctx; + } - var bufferPadding = 4; - var rowBuffer = new Float32Array(width + 2 * bufferPadding); + TilingPattern.prototype = { + createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { + var operatorList = this.operatorList; + var bbox = this.bbox; + var xstep = this.xstep; + var ystep = this.ystep; + var paintType = this.paintType; + var tilingType = this.tilingType; + var color = this.color; + var canvasGraphicsFactory = this.canvasGraphicsFactory; - // Section F.3.4 HOR_SR - if (width === 1) { - // if width = 1, when u0 even keep items as is, when odd divide by 2 - if ((u0 & 1) !== 0) { - for (v = 0, k = 0; v < height; v++, k += width) { - items[k] *= 0.5; - } - } - } else { - for (v = 0, k = 0; v < height; v++, k += width) { - rowBuffer.set(items.subarray(k, k + width), bufferPadding); + info('TilingType: ' + tilingType); - this.extend(rowBuffer, bufferPadding, width); - this.filter(rowBuffer, bufferPadding, width); + var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; - items.set( - rowBuffer.subarray(bufferPadding, bufferPadding + width), - k); - } - } + var topLeft = [x0, y0]; + // we want the canvas to be as large as the step size + var botRight = [x0 + xstep, y0 + ystep]; - // Accesses to the items array can take long, because it may not fit into - // CPU cache and has to be fetched from main memory. Since subsequent - // accesses to the items array are not local when reading columns, we - // have a cache miss every time. To reduce cache misses, get up to - // 'numBuffers' items at a time and store them into the individual - // buffers. The colBuffers should be small enough to fit into CPU cache. - var numBuffers = 16; - var colBuffers = []; - for (i = 0; i < numBuffers; i++) { - colBuffers.push(new Float32Array(height + 2 * bufferPadding)); - } - var b, currentBuffer = 0; - ll = bufferPadding + height; + var width = botRight[0] - topLeft[0]; + var height = botRight[1] - topLeft[1]; - // Section F.3.5 VER_SR - if (height === 1) { - // if height = 1, when v0 even keep items as is, when odd divide by 2 - if ((v0 & 1) !== 0) { - for (u = 0; u < width; u++) { - items[u] *= 0.5; - } - } - } else { - for (u = 0; u < width; u++) { - // if we ran out of buffers, copy several image columns at once - if (currentBuffer === 0) { - numBuffers = Math.min(width - u, numBuffers); - for (k = u, l = bufferPadding; l < ll; k += width, l++) { - for (b = 0; b < numBuffers; b++) { - colBuffers[b][l] = items[k + b]; - } - } - currentBuffer = numBuffers; - } + // Obtain scale from matrix and current transformation matrix. + var matrixScale = Util.singularValueDecompose2dScale(this.matrix); + var curMatrixScale = Util.singularValueDecompose2dScale( + this.baseTransform); + var combinedScale = [matrixScale[0] * curMatrixScale[0], + matrixScale[1] * curMatrixScale[1]]; - currentBuffer--; - var buffer = colBuffers[currentBuffer]; - this.extend(buffer, bufferPadding, height); - this.filter(buffer, bufferPadding, height); + // MAX_PATTERN_SIZE is used to avoid OOM situation. + // Use width and height values that are as close as possible to the end + // result when the pattern is used. Too low value makes the pattern look + // blurry. Too large value makes it look too crispy. + width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), + MAX_PATTERN_SIZE); - // If this is last buffer in this group of buffers, flush all buffers. - if (currentBuffer === 0) { - k = u - numBuffers + 1; - for (l = bufferPadding; l < ll; k += width, l++) { - for (b = 0; b < numBuffers; b++) { - items[k + b] = colBuffers[b][l]; - } - } - } - } - } + height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), + MAX_PATTERN_SIZE); - return { - width: width, - height: height, - items: items - }; - }; - return Transform; - })(); + var tmpCanvas = owner.cachedCanvases.getCanvas('pattern', + width, height, true); + var tmpCtx = tmpCanvas.context; + var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx); + graphics.groupLevel = owner.groupLevel; - // Section 3.8.2 Irreversible 9-7 filter - var IrreversibleTransform = (function IrreversibleTransformClosure() { - function IrreversibleTransform() { - Transform.call(this); - } + this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); - IrreversibleTransform.prototype = Object.create(Transform.prototype); - IrreversibleTransform.prototype.filter = - function irreversibleTransformFilter(x, offset, length) { - var len = length >> 1; - offset = offset | 0; - var j, n, current, next; + this.setScale(width, height, xstep, ystep); + this.transformToScale(graphics); - var alpha = -1.586134342059924; - var beta = -0.052980118572961; - var gamma = 0.882911075530934; - var delta = 0.443506852043971; - var K = 1.230174104914001; - var K_ = 1 / K; + // transform coordinates to pattern space + var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; + graphics.transform.apply(graphics, tmpTranslate); - // step 1 is combined with step 3 + this.clipBbox(graphics, bbox, x0, y0, x1, y1); - // step 2 - j = offset - 3; - for (n = len + 4; n--; j += 2) { - x[j] *= K_; - } + graphics.executeOperatorList(operatorList); + return tmpCanvas.canvas; + }, - // step 1 & 3 - j = offset - 2; - current = delta * x[j -1]; - for (n = len + 3; n--; j += 2) { - next = delta * x[j + 1]; - x[j] = K * x[j] - current - next; - if (n--) { - j += 2; - current = delta * x[j + 1]; - x[j] = K * x[j] - current - next; - } else { - break; - } - } + setScale: function TilingPattern_setScale(width, height, xstep, ystep) { + this.scale = [width / xstep, height / ystep]; + }, - // step 4 - j = offset - 1; - current = gamma * x[j - 1]; - for (n = len + 2; n--; j += 2) { - next = gamma * x[j + 1]; - x[j] -= current + next; - if (n--) { - j += 2; - current = gamma * x[j + 1]; - x[j] -= current + next; - } else { - break; - } - } + transformToScale: function TilingPattern_transformToScale(graphics) { + var scale = this.scale; + var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; + graphics.transform.apply(graphics, tmpScale); + }, - // step 5 - j = offset; - current = beta * x[j - 1]; - for (n = len + 1; n--; j += 2) { - next = beta * x[j + 1]; - x[j] -= current + next; - if (n--) { - j += 2; - current = beta * x[j + 1]; - x[j] -= current + next; - } else { - break; - } + scaleToContext: function TilingPattern_scaleToContext() { + var scale = this.scale; + this.ctx.scale(1 / scale[0], 1 / scale[1]); + }, + + clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { + if (bbox && isArray(bbox) && bbox.length === 4) { + var bboxWidth = x1 - x0; + var bboxHeight = y1 - y0; + graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight); + graphics.clip(); + graphics.endPath(); } + }, - // step 6 - if (len !== 0) { - j = offset + 1; - current = alpha * x[j - 1]; - for (n = len; n--; j += 2) { - next = alpha * x[j + 1]; - x[j] -= current + next; - if (n--) { - j += 2; - current = alpha * x[j + 1]; - x[j] -= current + next; - } else { + setFillAndStrokeStyleToContext: + function setFillAndStrokeStyleToContext(context, paintType, color) { + switch (paintType) { + case PaintType.COLORED: + var ctx = this.ctx; + context.fillStyle = ctx.fillStyle; + context.strokeStyle = ctx.strokeStyle; break; - } + case PaintType.UNCOLORED: + var cssColor = Util.makeCssRgb(color[0], color[1], color[2]); + context.fillStyle = cssColor; + context.strokeStyle = cssColor; + break; + default: + error('Unsupported paint type: ' + paintType); } - } - }; - - return IrreversibleTransform; - })(); - - // Section 3.8.1 Reversible 5-3 filter - var ReversibleTransform = (function ReversibleTransformClosure() { - function ReversibleTransform() { - Transform.call(this); - } - - ReversibleTransform.prototype = Object.create(Transform.prototype); - ReversibleTransform.prototype.filter = - function reversibleTransformFilter(x, offset, length) { - var len = length >> 1; - offset = offset | 0; - var j, n; + }, - for (j = offset, n = len + 1; n--; j += 2) { - x[j] -= (x[j - 1] + x[j + 1] + 2) >> 2; - } + getPattern: function TilingPattern_getPattern(ctx, owner) { + var temporaryPatternCanvas = this.createPatternCanvas(owner); - for (j = offset + 1, n = len; n--; j += 2) { - x[j] += (x[j - 1] + x[j + 1]) >> 1; - } - }; + ctx = this.ctx; + ctx.setTransform.apply(ctx, this.baseTransform); + ctx.transform.apply(ctx, this.matrix); + this.scaleToContext(); - return ReversibleTransform; - })(); + return ctx.createPattern(temporaryPatternCanvas, 'repeat'); + } + }; - return JpxImage; + return TilingPattern; })(); -exports.JpxImage = JpxImage; +exports.getShadingPatternFromIR = getShadingPatternFromIR; +exports.TilingPattern = TilingPattern; })); - (function (root, factory) { { - factory((root.pdfjsCoreMurmurHash3 = {}), root.pdfjsSharedUtil); + factory((root.pdfjsCoreCrypto = {}), root.pdfjsSharedUtil, + root.pdfjsCorePrimitives, root.pdfjsCoreStream); } -}(this, function (exports, sharedUtil) { - -var Uint32ArrayView = sharedUtil.Uint32ArrayView; - -var MurmurHash3_64 = (function MurmurHash3_64Closure (seed) { - // Workaround for missing math precison in JS. - var MASK_HIGH = 0xffff0000; - var MASK_LOW = 0xffff; +}(this, function (exports, sharedUtil, corePrimitives, coreStream) { - function MurmurHash3_64 (seed) { - var SEED = 0xc3d2e1f0; - this.h1 = seed ? seed & 0xffffffff : SEED; - this.h2 = seed ? seed & 0xffffffff : SEED; - } +var PasswordException = sharedUtil.PasswordException; +var PasswordResponses = sharedUtil.PasswordResponses; +var bytesToString = sharedUtil.bytesToString; +var error = sharedUtil.error; +var isInt = sharedUtil.isInt; +var stringToBytes = sharedUtil.stringToBytes; +var utf8StringToString = sharedUtil.utf8StringToString; +var warn = sharedUtil.warn; +var Name = corePrimitives.Name; +var isName = corePrimitives.isName; +var isDict = corePrimitives.isDict; +var DecryptStream = coreStream.DecryptStream; - var alwaysUseUint32ArrayView = false; - // old webkits have issues with non-aligned arrays - try { - new Uint32Array(new Uint8Array(5).buffer, 0, 1); - } catch (e) { - alwaysUseUint32ArrayView = true; +var ARCFourCipher = (function ARCFourCipherClosure() { + function ARCFourCipher(key) { + this.a = 0; + this.b = 0; + var s = new Uint8Array(256); + var i, j = 0, tmp, keyLength = key.length; + for (i = 0; i < 256; ++i) { + s[i] = i; + } + for (i = 0; i < 256; ++i) { + tmp = s[i]; + j = (j + tmp + key[i % keyLength]) & 0xFF; + s[i] = s[j]; + s[j] = tmp; + } + this.s = s; } - MurmurHash3_64.prototype = { - update: function MurmurHash3_64_update(input) { - var useUint32ArrayView = alwaysUseUint32ArrayView; - var i; - if (typeof input === 'string') { - var data = new Uint8Array(input.length * 2); - var length = 0; - for (i = 0; i < input.length; i++) { - var code = input.charCodeAt(i); - if (code <= 0xff) { - data[length++] = code; - } - else { - data[length++] = code >>> 8; - data[length++] = code & 0xff; - } - } - } else if (input instanceof Uint8Array) { - data = input; - length = data.length; - } else if (typeof input === 'object' && ('length' in input)) { - // processing regular arrays as well, e.g. for IE9 - data = input; - length = data.length; - useUint32ArrayView = true; - } else { - throw new Error('Wrong data format in MurmurHash3_64_update. ' + - 'Input must be a string or array.'); + ARCFourCipher.prototype = { + encryptBlock: function ARCFourCipher_encryptBlock(data) { + var i, n = data.length, tmp, tmp2; + var a = this.a, b = this.b, s = this.s; + var output = new Uint8Array(n); + for (i = 0; i < n; ++i) { + a = (a + 1) & 0xFF; + tmp = s[a]; + b = (b + tmp) & 0xFF; + tmp2 = s[b]; + s[a] = tmp2; + s[b] = tmp; + output[i] = data[i] ^ s[(tmp + tmp2) & 0xFF]; } + this.a = a; + this.b = b; + return output; + } + }; + ARCFourCipher.prototype.decryptBlock = ARCFourCipher.prototype.encryptBlock; - var blockCounts = length >> 2; - var tailLength = length - blockCounts * 4; - // we don't care about endianness here - var dataUint32 = useUint32ArrayView ? - new Uint32ArrayView(data, blockCounts) : - new Uint32Array(data.buffer, 0, blockCounts); - var k1 = 0; - var k2 = 0; - var h1 = this.h1; - var h2 = this.h2; - var C1 = 0xcc9e2d51; - var C2 = 0x1b873593; - var C1_LOW = C1 & MASK_LOW; - var C2_LOW = C2 & MASK_LOW; + return ARCFourCipher; +})(); - for (i = 0; i < blockCounts; i++) { - if (i & 1) { - k1 = dataUint32[i]; - k1 = (k1 * C1 & MASK_HIGH) | (k1 * C1_LOW & MASK_LOW); - k1 = k1 << 15 | k1 >>> 17; - k1 = (k1 * C2 & MASK_HIGH) | (k1 * C2_LOW & MASK_LOW); - h1 ^= k1; - h1 = h1 << 13 | h1 >>> 19; - h1 = h1 * 5 + 0xe6546b64; +var calculateMD5 = (function calculateMD5Closure() { + var r = new Uint8Array([ + 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, + 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, + 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, + 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21]); + + var k = new Int32Array([ + -680876936, -389564586, 606105819, -1044525330, -176418897, 1200080426, + -1473231341, -45705983, 1770035416, -1958414417, -42063, -1990404162, + 1804603682, -40341101, -1502002290, 1236535329, -165796510, -1069501632, + 643717713, -373897302, -701558691, 38016083, -660478335, -405537848, + 568446438, -1019803690, -187363961, 1163531501, -1444681467, -51403784, + 1735328473, -1926607734, -378558, -2022574463, 1839030562, -35309556, + -1530992060, 1272893353, -155497632, -1094730640, 681279174, -358537222, + -722521979, 76029189, -640364487, -421815835, 530742520, -995338651, + -198630844, 1126891415, -1416354905, -57434055, 1700485571, -1894986606, + -1051523, -2054922799, 1873313359, -30611744, -1560198380, 1309151649, + -145523070, -1120210379, 718787259, -343485551]); + + function hash(data, offset, length) { + var h0 = 1732584193, h1 = -271733879, h2 = -1732584194, h3 = 271733878; + // pre-processing + var paddedLength = (length + 72) & ~63; // data + 9 extra bytes + var padded = new Uint8Array(paddedLength); + var i, j, n; + for (i = 0; i < length; ++i) { + padded[i] = data[offset++]; + } + padded[i++] = 0x80; + n = paddedLength - 8; + while (i < n) { + padded[i++] = 0; + } + padded[i++] = (length << 3) & 0xFF; + padded[i++] = (length >> 5) & 0xFF; + padded[i++] = (length >> 13) & 0xFF; + padded[i++] = (length >> 21) & 0xFF; + padded[i++] = (length >>> 29) & 0xFF; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + var w = new Int32Array(16); + for (i = 0; i < paddedLength;) { + for (j = 0; j < 16; ++j, i += 4) { + w[j] = (padded[i] | (padded[i + 1] << 8) | + (padded[i + 2] << 16) | (padded[i + 3] << 24)); + } + var a = h0, b = h1, c = h2, d = h3, f, g; + for (j = 0; j < 64; ++j) { + if (j < 16) { + f = (b & c) | ((~b) & d); + g = j; + } else if (j < 32) { + f = (d & b) | ((~d) & c); + g = (5 * j + 1) & 15; + } else if (j < 48) { + f = b ^ c ^ d; + g = (3 * j + 5) & 15; } else { - k2 = dataUint32[i]; - k2 = (k2 * C1 & MASK_HIGH) | (k2 * C1_LOW & MASK_LOW); - k2 = k2 << 15 | k2 >>> 17; - k2 = (k2 * C2 & MASK_HIGH) | (k2 * C2_LOW & MASK_LOW); - h2 ^= k2; - h2 = h2 << 13 | h2 >>> 19; - h2 = h2 * 5 + 0xe6546b64; + f = c ^ (b | (~d)); + g = (7 * j) & 15; } + var tmp = d, rotateArg = (a + f + k[j] + w[g]) | 0, rotate = r[j]; + d = c; + c = b; + b = (b + ((rotateArg << rotate) | (rotateArg >>> (32 - rotate)))) | 0; + a = tmp; } + h0 = (h0 + a) | 0; + h1 = (h1 + b) | 0; + h2 = (h2 + c) | 0; + h3 = (h3 + d) | 0; + } + return new Uint8Array([ + h0 & 0xFF, (h0 >> 8) & 0xFF, (h0 >> 16) & 0xFF, (h0 >>> 24) & 0xFF, + h1 & 0xFF, (h1 >> 8) & 0xFF, (h1 >> 16) & 0xFF, (h1 >>> 24) & 0xFF, + h2 & 0xFF, (h2 >> 8) & 0xFF, (h2 >> 16) & 0xFF, (h2 >>> 24) & 0xFF, + h3 & 0xFF, (h3 >> 8) & 0xFF, (h3 >> 16) & 0xFF, (h3 >>> 24) & 0xFF + ]); + } - k1 = 0; + return hash; +})(); +var Word64 = (function Word64Closure() { + function Word64(highInteger, lowInteger) { + this.high = highInteger | 0; + this.low = lowInteger | 0; + } + Word64.prototype = { + and: function Word64_and(word) { + this.high &= word.high; + this.low &= word.low; + }, + xor: function Word64_xor(word) { + this.high ^= word.high; + this.low ^= word.low; + }, - switch (tailLength) { - case 3: - k1 ^= data[blockCounts * 4 + 2] << 16; - /* falls through */ - case 2: - k1 ^= data[blockCounts * 4 + 1] << 8; - /* falls through */ - case 1: - k1 ^= data[blockCounts * 4]; - /* falls through */ - k1 = (k1 * C1 & MASK_HIGH) | (k1 * C1_LOW & MASK_LOW); - k1 = k1 << 15 | k1 >>> 17; - k1 = (k1 * C2 & MASK_HIGH) | (k1 * C2_LOW & MASK_LOW); - if (blockCounts & 1) { - h1 ^= k1; - } else { - h2 ^= k1; - } + or: function Word64_or(word) { + this.high |= word.high; + this.low |= word.low; + }, + + shiftRight: function Word64_shiftRight(places) { + if (places >= 32) { + this.low = (this.high >>> (places - 32)) | 0; + this.high = 0; + } else { + this.low = (this.low >>> places) | (this.high << (32 - places)); + this.high = (this.high >>> places) | 0; } + }, - this.h1 = h1; - this.h2 = h2; - return this; + shiftLeft: function Word64_shiftLeft(places) { + if (places >= 32) { + this.high = this.low << (places - 32); + this.low = 0; + } else { + this.high = (this.high << places) | (this.low >>> (32 - places)); + this.low = this.low << places; + } }, - hexdigest: function MurmurHash3_64_hexdigest () { - var h1 = this.h1; - var h2 = this.h2; + rotateRight: function Word64_rotateRight(places) { + var low, high; + if (places & 32) { + high = this.low; + low = this.high; + } else { + low = this.low; + high = this.high; + } + places &= 31; + this.low = (low >>> places) | (high << (32 - places)); + this.high = (high >>> places) | (low << (32 - places)); + }, - h1 ^= h2 >>> 1; - h1 = (h1 * 0xed558ccd & MASK_HIGH) | (h1 * 0x8ccd & MASK_LOW); - h2 = (h2 * 0xff51afd7 & MASK_HIGH) | - (((h2 << 16 | h1 >>> 16) * 0xafd7ed55 & MASK_HIGH) >>> 16); - h1 ^= h2 >>> 1; - h1 = (h1 * 0x1a85ec53 & MASK_HIGH) | (h1 * 0xec53 & MASK_LOW); - h2 = (h2 * 0xc4ceb9fe & MASK_HIGH) | - (((h2 << 16 | h1 >>> 16) * 0xb9fe1a85 & MASK_HIGH) >>> 16); - h1 ^= h2 >>> 1; + not: function Word64_not() { + this.high = ~this.high; + this.low = ~this.low; + }, - for (var i = 0, arr = [h1, h2], str = ''; i < arr.length; i++) { - var hex = (arr[i] >>> 0).toString(16); - while (hex.length < 8) { - hex = '0' + hex; - } - str += hex; + add: function Word64_add(word) { + var lowAdd = (this.low >>> 0) + (word.low >>> 0); + var highAdd = (this.high >>> 0) + (word.high >>> 0); + if (lowAdd > 0xFFFFFFFF) { + highAdd += 1; } + this.low = lowAdd | 0; + this.high = highAdd | 0; + }, - return str; + copyTo: function Word64_copyTo(bytes, offset) { + bytes[offset] = (this.high >>> 24) & 0xFF; + bytes[offset + 1] = (this.high >> 16) & 0xFF; + bytes[offset + 2] = (this.high >> 8) & 0xFF; + bytes[offset + 3] = this.high & 0xFF; + bytes[offset + 4] = (this.low >>> 24) & 0xFF; + bytes[offset + 5] = (this.low >> 16) & 0xFF; + bytes[offset + 6] = (this.low >> 8) & 0xFF; + bytes[offset + 7] = this.low & 0xFF; + }, + + assign: function Word64_assign(word) { + this.high = word.high; + this.low = word.low; } }; - - return MurmurHash3_64; + return Word64; })(); -exports.MurmurHash3_64 = MurmurHash3_64; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCorePrimitives = {}), root.pdfjsSharedUtil); +var calculateSHA256 = (function calculateSHA256Closure() { + function rotr(x, n) { + return (x >>> n) | (x << 32 - n); } -}(this, function (exports, sharedUtil) { - -var isArray = sharedUtil.isArray; -var Name = (function NameClosure() { - function Name(name) { - this.name = name; + function ch(x, y, z) { + return (x & y) ^ (~x & z); } - Name.prototype = {}; + function maj(x, y, z) { + return (x & y) ^ (x & z) ^ (y & z); + } - var nameCache = {}; + function sigma(x) { + return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22); + } - Name.get = function Name_get(name) { - var nameValue = nameCache[name]; - return (nameValue ? nameValue : (nameCache[name] = new Name(name))); - }; + function sigmaPrime(x) { + return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25); + } - return Name; -})(); + function littleSigma(x) { + return rotr(x, 7) ^ rotr(x, 18) ^ x >>> 3; + } -var Cmd = (function CmdClosure() { - function Cmd(cmd) { - this.cmd = cmd; + function littleSigmaPrime(x) { + return rotr(x, 17) ^ rotr(x, 19) ^ x >>> 10; } - Cmd.prototype = {}; + var k = [0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2]; - var cmdCache = {}; + function hash(data, offset, length) { + // initial hash values + var h0 = 0x6a09e667, h1 = 0xbb67ae85, h2 = 0x3c6ef372, + h3 = 0xa54ff53a, h4 = 0x510e527f, h5 = 0x9b05688c, + h6 = 0x1f83d9ab, h7 = 0x5be0cd19; + // pre-processing + var paddedLength = Math.ceil((length + 9) / 64) * 64; + var padded = new Uint8Array(paddedLength); + var i, j, n; + for (i = 0; i < length; ++i) { + padded[i] = data[offset++]; + } + padded[i++] = 0x80; + n = paddedLength - 8; + while (i < n) { + padded[i++] = 0; + } + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = (length >>> 29) & 0xFF; + padded[i++] = (length >> 21) & 0xFF; + padded[i++] = (length >> 13) & 0xFF; + padded[i++] = (length >> 5) & 0xFF; + padded[i++] = (length << 3) & 0xFF; + var w = new Uint32Array(64); + // for each 512 bit block + for (i = 0; i < paddedLength;) { + for (j = 0; j < 16; ++j) { + w[j] = (padded[i] << 24 | (padded[i + 1] << 16) | + (padded[i + 2] << 8) | (padded[i + 3])); + i += 4; + } - Cmd.get = function Cmd_get(cmd) { - var cmdValue = cmdCache[cmd]; - return (cmdValue ? cmdValue : (cmdCache[cmd] = new Cmd(cmd))); - }; + for (j = 16; j < 64; ++j) { + w[j] = littleSigmaPrime(w[j - 2]) + w[j - 7] + + littleSigma(w[j - 15]) + w[j - 16] | 0; + } + var a = h0, b = h1, c = h2, d = h3, e = h4, + f = h5, g = h6, h = h7, t1, t2; + for (j = 0; j < 64; ++j) { + t1 = h + sigmaPrime(e) + ch(e, f, g) + k[j] + w[j]; + t2 = sigma(a) + maj(a, b, c); + h = g; + g = f; + f = e; + e = (d + t1) | 0; + d = c; + c = b; + b = a; + a = (t1 + t2) | 0; + } + h0 = (h0 + a) | 0; + h1 = (h1 + b) | 0; + h2 = (h2 + c) | 0; + h3 = (h3 + d) | 0; + h4 = (h4 + e) | 0; + h5 = (h5 + f) | 0; + h6 = (h6 + g) | 0; + h7 = (h7 + h) | 0; + } + return new Uint8Array([ + (h0 >> 24) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 8) & 0xFF, (h0) & 0xFF, + (h1 >> 24) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 8) & 0xFF, (h1) & 0xFF, + (h2 >> 24) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 8) & 0xFF, (h2) & 0xFF, + (h3 >> 24) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 8) & 0xFF, (h3) & 0xFF, + (h4 >> 24) & 0xFF, (h4 >> 16) & 0xFF, (h4 >> 8) & 0xFF, (h4) & 0xFF, + (h5 >> 24) & 0xFF, (h5 >> 16) & 0xFF, (h5 >> 8) & 0xFF, (h5) & 0xFF, + (h6 >> 24) & 0xFF, (h6 >> 16) & 0xFF, (h6 >> 8) & 0xFF, (h6) & 0xFF, + (h7 >> 24) & 0xFF, (h7 >> 16) & 0xFF, (h7 >> 8) & 0xFF, (h7) & 0xFF + ]); + } - return Cmd; + return hash; })(); -var Dict = (function DictClosure() { - var nonSerializable = function nonSerializableClosure() { - return nonSerializable; // creating closure on some variable - }; +var calculateSHA512 = (function calculateSHA512Closure() { + function ch(result, x, y, z, tmp) { + result.assign(x); + result.and(y); + tmp.assign(x); + tmp.not(); + tmp.and(z); + result.xor(tmp); + } - var GETALL_DICTIONARY_TYPES_WHITELIST = { - 'Background': true, - 'ExtGState': true, - 'Halftone': true, - 'Layout': true, - 'Mask': true, - 'Pagination': true, - 'Printing': true - }; + function maj(result, x, y, z, tmp) { + result.assign(x); + result.and(y); + tmp.assign(x); + tmp.and(z); + result.xor(tmp); + tmp.assign(y); + tmp.and(z); + result.xor(tmp); + } - function isRecursionAllowedFor(dict) { - if (!isName(dict.Type)) { - return true; - } - var dictType = dict.Type.name; - return GETALL_DICTIONARY_TYPES_WHITELIST[dictType] === true; + function sigma(result, x, tmp) { + result.assign(x); + result.rotateRight(28); + tmp.assign(x); + tmp.rotateRight(34); + result.xor(tmp); + tmp.assign(x); + tmp.rotateRight(39); + result.xor(tmp); } - // xref is optional - function Dict(xref) { - // Map should only be used internally, use functions below to access. - this.map = Object.create(null); - this.xref = xref; - this.objId = null; - this.__nonSerializable__ = nonSerializable; // disable cloning of the Dict + function sigmaPrime(result, x, tmp) { + result.assign(x); + result.rotateRight(14); + tmp.assign(x); + tmp.rotateRight(18); + result.xor(tmp); + tmp.assign(x); + tmp.rotateRight(41); + result.xor(tmp); } - Dict.prototype = { - assignXref: function Dict_assignXref(newXref) { - this.xref = newXref; - }, + function littleSigma(result, x, tmp) { + result.assign(x); + result.rotateRight(1); + tmp.assign(x); + tmp.rotateRight(8); + result.xor(tmp); + tmp.assign(x); + tmp.shiftRight(7); + result.xor(tmp); + } - // automatically dereferences Ref objects - get: function Dict_get(key1, key2, key3) { - var value; - var xref = this.xref; - if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || - typeof key2 === 'undefined') { - return xref ? xref.fetchIfRef(value) : value; - } - if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || - typeof key3 === 'undefined') { - return xref ? xref.fetchIfRef(value) : value; - } - value = this.map[key3] || null; - return xref ? xref.fetchIfRef(value) : value; - }, + function littleSigmaPrime(result, x, tmp) { + result.assign(x); + result.rotateRight(19); + tmp.assign(x); + tmp.rotateRight(61); + result.xor(tmp); + tmp.assign(x); + tmp.shiftRight(6); + result.xor(tmp); + } - // Same as get(), but returns a promise and uses fetchIfRefAsync(). - getAsync: function Dict_getAsync(key1, key2, key3) { - var value; - var xref = this.xref; - if (typeof (value = this.map[key1]) !== 'undefined' || key1 in this.map || - typeof key2 === 'undefined') { - if (xref) { - return xref.fetchIfRefAsync(value); - } - return Promise.resolve(value); - } - if (typeof (value = this.map[key2]) !== 'undefined' || key2 in this.map || - typeof key3 === 'undefined') { - if (xref) { - return xref.fetchIfRefAsync(value); - } - return Promise.resolve(value); - } - value = this.map[key3] || null; - if (xref) { - return xref.fetchIfRefAsync(value); - } - return Promise.resolve(value); - }, + var k = [ + new Word64(0x428a2f98, 0xd728ae22), new Word64(0x71374491, 0x23ef65cd), + new Word64(0xb5c0fbcf, 0xec4d3b2f), new Word64(0xe9b5dba5, 0x8189dbbc), + new Word64(0x3956c25b, 0xf348b538), new Word64(0x59f111f1, 0xb605d019), + new Word64(0x923f82a4, 0xaf194f9b), new Word64(0xab1c5ed5, 0xda6d8118), + new Word64(0xd807aa98, 0xa3030242), new Word64(0x12835b01, 0x45706fbe), + new Word64(0x243185be, 0x4ee4b28c), new Word64(0x550c7dc3, 0xd5ffb4e2), + new Word64(0x72be5d74, 0xf27b896f), new Word64(0x80deb1fe, 0x3b1696b1), + new Word64(0x9bdc06a7, 0x25c71235), new Word64(0xc19bf174, 0xcf692694), + new Word64(0xe49b69c1, 0x9ef14ad2), new Word64(0xefbe4786, 0x384f25e3), + new Word64(0x0fc19dc6, 0x8b8cd5b5), new Word64(0x240ca1cc, 0x77ac9c65), + new Word64(0x2de92c6f, 0x592b0275), new Word64(0x4a7484aa, 0x6ea6e483), + new Word64(0x5cb0a9dc, 0xbd41fbd4), new Word64(0x76f988da, 0x831153b5), + new Word64(0x983e5152, 0xee66dfab), new Word64(0xa831c66d, 0x2db43210), + new Word64(0xb00327c8, 0x98fb213f), new Word64(0xbf597fc7, 0xbeef0ee4), + new Word64(0xc6e00bf3, 0x3da88fc2), new Word64(0xd5a79147, 0x930aa725), + new Word64(0x06ca6351, 0xe003826f), new Word64(0x14292967, 0x0a0e6e70), + new Word64(0x27b70a85, 0x46d22ffc), new Word64(0x2e1b2138, 0x5c26c926), + new Word64(0x4d2c6dfc, 0x5ac42aed), new Word64(0x53380d13, 0x9d95b3df), + new Word64(0x650a7354, 0x8baf63de), new Word64(0x766a0abb, 0x3c77b2a8), + new Word64(0x81c2c92e, 0x47edaee6), new Word64(0x92722c85, 0x1482353b), + new Word64(0xa2bfe8a1, 0x4cf10364), new Word64(0xa81a664b, 0xbc423001), + new Word64(0xc24b8b70, 0xd0f89791), new Word64(0xc76c51a3, 0x0654be30), + new Word64(0xd192e819, 0xd6ef5218), new Word64(0xd6990624, 0x5565a910), + new Word64(0xf40e3585, 0x5771202a), new Word64(0x106aa070, 0x32bbd1b8), + new Word64(0x19a4c116, 0xb8d2d0c8), new Word64(0x1e376c08, 0x5141ab53), + new Word64(0x2748774c, 0xdf8eeb99), new Word64(0x34b0bcb5, 0xe19b48a8), + new Word64(0x391c0cb3, 0xc5c95a63), new Word64(0x4ed8aa4a, 0xe3418acb), + new Word64(0x5b9cca4f, 0x7763e373), new Word64(0x682e6ff3, 0xd6b2b8a3), + new Word64(0x748f82ee, 0x5defb2fc), new Word64(0x78a5636f, 0x43172f60), + new Word64(0x84c87814, 0xa1f0ab72), new Word64(0x8cc70208, 0x1a6439ec), + new Word64(0x90befffa, 0x23631e28), new Word64(0xa4506ceb, 0xde82bde9), + new Word64(0xbef9a3f7, 0xb2c67915), new Word64(0xc67178f2, 0xe372532b), + new Word64(0xca273ece, 0xea26619c), new Word64(0xd186b8c7, 0x21c0c207), + new Word64(0xeada7dd6, 0xcde0eb1e), new Word64(0xf57d4f7f, 0xee6ed178), + new Word64(0x06f067aa, 0x72176fba), new Word64(0x0a637dc5, 0xa2c898a6), + new Word64(0x113f9804, 0xbef90dae), new Word64(0x1b710b35, 0x131c471b), + new Word64(0x28db77f5, 0x23047d84), new Word64(0x32caab7b, 0x40c72493), + new Word64(0x3c9ebe0a, 0x15c9bebc), new Word64(0x431d67c4, 0x9c100d4c), + new Word64(0x4cc5d4be, 0xcb3e42b6), new Word64(0x597f299c, 0xfc657e2a), + new Word64(0x5fcb6fab, 0x3ad6faec), new Word64(0x6c44198c, 0x4a475817)]; - // Same as get(), but dereferences all elements if the result is an Array. - getArray: function Dict_getArray(key1, key2, key3) { - var value = this.get(key1, key2, key3); - var xref = this.xref; - if (!isArray(value) || !xref) { - return value; - } - value = value.slice(); // Ensure that we don't modify the Dict data. - for (var i = 0, ii = value.length; i < ii; i++) { - if (!isRef(value[i])) { - continue; - } - value[i] = xref.fetch(value[i]); - } - return value; - }, + function hash(data, offset, length, mode384) { + mode384 = !!mode384; + // initial hash values + var h0, h1, h2, h3, h4, h5, h6, h7; + if (!mode384) { + h0 = new Word64(0x6a09e667, 0xf3bcc908); + h1 = new Word64(0xbb67ae85, 0x84caa73b); + h2 = new Word64(0x3c6ef372, 0xfe94f82b); + h3 = new Word64(0xa54ff53a, 0x5f1d36f1); + h4 = new Word64(0x510e527f, 0xade682d1); + h5 = new Word64(0x9b05688c, 0x2b3e6c1f); + h6 = new Word64(0x1f83d9ab, 0xfb41bd6b); + h7 = new Word64(0x5be0cd19, 0x137e2179); + } + else { + // SHA384 is exactly the same + // except with different starting values and a trimmed result + h0 = new Word64(0xcbbb9d5d, 0xc1059ed8); + h1 = new Word64(0x629a292a, 0x367cd507); + h2 = new Word64(0x9159015a, 0x3070dd17); + h3 = new Word64(0x152fecd8, 0xf70e5939); + h4 = new Word64(0x67332667, 0xffc00b31); + h5 = new Word64(0x8eb44a87, 0x68581511); + h6 = new Word64(0xdb0c2e0d, 0x64f98fa7); + h7 = new Word64(0x47b5481d, 0xbefa4fa4); + } - // no dereferencing - getRaw: function Dict_getRaw(key) { - return this.map[key]; - }, + // pre-processing + var paddedLength = Math.ceil((length + 17) / 128) * 128; + var padded = new Uint8Array(paddedLength); + var i, j, n; + for (i = 0; i < length; ++i) { + padded[i] = data[offset++]; + } + padded[i++] = 0x80; + n = paddedLength - 16; + while (i < n) { + padded[i++] = 0; + } + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = 0; + padded[i++] = (length >>> 29) & 0xFF; + padded[i++] = (length >> 21) & 0xFF; + padded[i++] = (length >> 13) & 0xFF; + padded[i++] = (length >> 5) & 0xFF; + padded[i++] = (length << 3) & 0xFF; - // creates new map and dereferences all Refs - getAll: function Dict_getAll() { - var all = Object.create(null); - var queue = null; - var key, obj; - for (key in this.map) { - obj = this.get(key); - if (obj instanceof Dict) { - if (isRecursionAllowedFor(obj)) { - (queue || (queue = [])).push({target: all, key: key, obj: obj}); - } else { - all[key] = this.getRaw(key); - } - } else { - all[key] = obj; - } - } - if (!queue) { - return all; - } + var w = new Array(80); + for (i = 0; i < 80; i++) { + w[i] = new Word64(0, 0); + } + var a = new Word64(0, 0), b = new Word64(0, 0), c = new Word64(0, 0); + var d = new Word64(0, 0), e = new Word64(0, 0), f = new Word64(0, 0); + var g = new Word64(0, 0), h = new Word64(0, 0); + var t1 = new Word64(0, 0), t2 = new Word64(0, 0); + var tmp1 = new Word64(0, 0), tmp2 = new Word64(0, 0), tmp3; - // trying to take cyclic references into the account - var processed = Object.create(null); - while (queue.length > 0) { - var item = queue.shift(); - var itemObj = item.obj; - var objId = itemObj.objId; - if (objId && objId in processed) { - item.target[item.key] = processed[objId]; - continue; - } - var dereferenced = Object.create(null); - for (key in itemObj.map) { - obj = itemObj.get(key); - if (obj instanceof Dict) { - if (isRecursionAllowedFor(obj)) { - queue.push({target: dereferenced, key: key, obj: obj}); - } else { - dereferenced[key] = itemObj.getRaw(key); - } - } else { - dereferenced[key] = obj; - } - } - if (objId) { - processed[objId] = dereferenced; - } - item.target[item.key] = dereferenced; + // for each 1024 bit block + for (i = 0; i < paddedLength;) { + for (j = 0; j < 16; ++j) { + w[j].high = (padded[i] << 24) | (padded[i + 1] << 16) | + (padded[i + 2] << 8) | (padded[i + 3]); + w[j].low = (padded[i + 4]) << 24 | (padded[i + 5]) << 16 | + (padded[i + 6]) << 8 | (padded[i + 7]); + i += 8; + } + for (j = 16; j < 80; ++j) { + tmp3 = w[j]; + littleSigmaPrime(tmp3, w[j - 2], tmp2); + tmp3.add(w[j - 7]); + littleSigma(tmp1, w[j - 15], tmp2); + tmp3.add(tmp1); + tmp3.add(w[j - 16]); } - return all; - }, - - getKeys: function Dict_getKeys() { - return Object.keys(this.map); - }, - set: function Dict_set(key, value) { - this.map[key] = value; - }, + a.assign(h0); b.assign(h1); c.assign(h2); d.assign(h3); + e.assign(h4); f.assign(h5); g.assign(h6); h.assign(h7); + for (j = 0; j < 80; ++j) { + t1.assign(h); + sigmaPrime(tmp1, e, tmp2); + t1.add(tmp1); + ch(tmp1, e, f, g, tmp2); + t1.add(tmp1); + t1.add(k[j]); + t1.add(w[j]); - has: function Dict_has(key) { - return key in this.map; - }, + sigma(t2, a, tmp2); + maj(tmp1, a, b, c, tmp2); + t2.add(tmp1); - forEach: function Dict_forEach(callback) { - for (var key in this.map) { - callback(key, this.get(key)); + tmp3 = h; + h = g; + g = f; + f = e; + d.add(t1); + e = d; + d = c; + c = b; + b = a; + tmp3.assign(t1); + tmp3.add(t2); + a = tmp3; } + h0.add(a); + h1.add(b); + h2.add(c); + h3.add(d); + h4.add(e); + h5.add(f); + h6.add(g); + h7.add(h); } - }; - - Dict.empty = new Dict(null); - Dict.merge = function Dict_merge(xref, dictArray) { - var mergedDict = new Dict(xref); - - for (var i = 0, ii = dictArray.length; i < ii; i++) { - var dict = dictArray[i]; - if (!isDict(dict)) { - continue; - } - for (var keyName in dict.map) { - if (mergedDict.map[keyName]) { - continue; - } - mergedDict.map[keyName] = dict.map[keyName]; - } + var result; + if (!mode384) { + result = new Uint8Array(64); + h0.copyTo(result,0); + h1.copyTo(result,8); + h2.copyTo(result,16); + h3.copyTo(result,24); + h4.copyTo(result,32); + h5.copyTo(result,40); + h6.copyTo(result,48); + h7.copyTo(result,56); } - return mergedDict; - }; + else { + result = new Uint8Array(48); + h0.copyTo(result,0); + h1.copyTo(result,8); + h2.copyTo(result,16); + h3.copyTo(result,24); + h4.copyTo(result,32); + h5.copyTo(result,40); + } + return result; + } - return Dict; + return hash; })(); +var calculateSHA384 = (function calculateSHA384Closure() { + function hash(data, offset, length) { + return calculateSHA512(data, offset, length, true); + } -var Ref = (function RefClosure() { - function Ref(num, gen) { - this.num = num; - this.gen = gen; + return hash; +})(); +var NullCipher = (function NullCipherClosure() { + function NullCipher() { } - Ref.prototype = { - toString: function Ref_toString() { - // This function is hot, so we make the string as compact as possible. - // |this.gen| is almost always zero, so we treat that case specially. - var str = this.num + 'R'; - if (this.gen !== 0) { - str += this.gen; - } - return str; + NullCipher.prototype = { + decryptBlock: function NullCipher_decryptBlock(data) { + return data; } }; - return Ref; + return NullCipher; })(); -// The reference is identified by number and generation. -// This structure stores only one instance of the reference. -var RefSet = (function RefSetClosure() { - function RefSet() { - this.dict = {}; +var AES128Cipher = (function AES128CipherClosure() { + var rcon = new Uint8Array([ + 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, + 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, + 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, + 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, + 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, + 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, + 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, + 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, + 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, + 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, + 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, + 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, + 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, + 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, + 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, + 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, + 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, + 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, + 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, + 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, + 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, + 0x74, 0xe8, 0xcb, 0x8d]); + + var s = new Uint8Array([ + 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, + 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, + 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, + 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, + 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, + 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, + 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, + 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, + 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, + 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, + 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, + 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, + 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, + 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, + 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, + 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, + 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, + 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, + 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, + 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, + 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, + 0xb0, 0x54, 0xbb, 0x16]); + + var inv_s = new Uint8Array([ + 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, + 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, + 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, + 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, + 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, + 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, + 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, + 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, + 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, + 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, + 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, + 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, + 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, + 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, + 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, + 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, + 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, + 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, + 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, + 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, + 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, + 0x55, 0x21, 0x0c, 0x7d]); + var mixCol = new Uint8Array(256); + for (var i = 0; i < 256; i++) { + if (i < 128) { + mixCol[i] = i << 1; + } else { + mixCol[i] = (i << 1) ^ 0x1b; + } } + var mix = new Uint32Array([ + 0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, + 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, + 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, + 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, + 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, + 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, + 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, + 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, + 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, + 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, + 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, + 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, + 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, + 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, + 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, + 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, + 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, + 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, + 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, + 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, + 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, + 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, + 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, + 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, + 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, + 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, + 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, + 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, + 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, + 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, + 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, + 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, + 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, + 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, + 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, + 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, + 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, + 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, + 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, + 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, + 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, + 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, + 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3]); - RefSet.prototype = { - has: function RefSet_has(ref) { - return ref.toString() in this.dict; - }, + function expandKey128(cipherKey) { + var b = 176, result = new Uint8Array(b); + result.set(cipherKey); + for (var j = 16, i = 1; j < b; ++i) { + // RotWord + var t1 = result[j - 3], t2 = result[j - 2], + t3 = result[j - 1], t4 = result[j - 4]; + // SubWord + t1 = s[t1]; + t2 = s[t2]; + t3 = s[t3]; + t4 = s[t4]; + // Rcon + t1 = t1 ^ rcon[i]; + for (var n = 0; n < 4; ++n) { + result[j] = (t1 ^= result[j - 16]); + j++; + result[j] = (t2 ^= result[j - 16]); + j++; + result[j] = (t3 ^= result[j - 16]); + j++; + result[j] = (t4 ^= result[j - 16]); + j++; + } + } + return result; + } - put: function RefSet_put(ref) { - this.dict[ref.toString()] = true; - }, + function decrypt128(input, key) { + var state = new Uint8Array(16); + state.set(input); + var i, j, k; + var t, u, v; + // AddRoundKey + for (j = 0, k = 160; j < 16; ++j, ++k) { + state[j] ^= key[k]; + } + for (i = 9; i >= 1; --i) { + // InvShiftRows + t = state[13]; + state[13] = state[9]; + state[9] = state[5]; + state[5] = state[1]; + state[1] = t; + t = state[14]; + u = state[10]; + state[14] = state[6]; + state[10] = state[2]; + state[6] = t; + state[2] = u; + t = state[15]; + u = state[11]; + v = state[7]; + state[15] = state[3]; + state[11] = t; + state[7] = u; + state[3] = v; + // InvSubBytes + for (j = 0; j < 16; ++j) { + state[j] = inv_s[state[j]]; + } + // AddRoundKey + for (j = 0, k = i * 16; j < 16; ++j, ++k) { + state[j] ^= key[k]; + } + // InvMixColumns + for (j = 0; j < 16; j += 4) { + var s0 = mix[state[j]], s1 = mix[state[j + 1]], + s2 = mix[state[j + 2]], s3 = mix[state[j + 3]]; + t = (s0 ^ (s1 >>> 8) ^ (s1 << 24) ^ (s2 >>> 16) ^ (s2 << 16) ^ + (s3 >>> 24) ^ (s3 << 8)); + state[j] = (t >>> 24) & 0xFF; + state[j + 1] = (t >> 16) & 0xFF; + state[j + 2] = (t >> 8) & 0xFF; + state[j + 3] = t & 0xFF; + } + } + // InvShiftRows + t = state[13]; + state[13] = state[9]; + state[9] = state[5]; + state[5] = state[1]; + state[1] = t; + t = state[14]; + u = state[10]; + state[14] = state[6]; + state[10] = state[2]; + state[6] = t; + state[2] = u; + t = state[15]; + u = state[11]; + v = state[7]; + state[15] = state[3]; + state[11] = t; + state[7] = u; + state[3] = v; + for (j = 0; j < 16; ++j) { + // InvSubBytes + state[j] = inv_s[state[j]]; + // AddRoundKey + state[j] ^= key[j]; + } + return state; + } - remove: function RefSet_remove(ref) { - delete this.dict[ref.toString()]; + function encrypt128(input, key) { + var t, u, v, k; + var state = new Uint8Array(16); + state.set(input); + for (j = 0; j < 16; ++j) { + // AddRoundKey + state[j] ^= key[j]; } - }; - return RefSet; -})(); + for (i = 1; i < 10; i++) { + //SubBytes + for (j = 0; j < 16; ++j) { + state[j] = s[state[j]]; + } + //ShiftRows + v = state[1]; + state[1] = state[5]; + state[5] = state[9]; + state[9] = state[13]; + state[13] = v; + v = state[2]; + u = state[6]; + state[2] = state[10]; + state[6] = state[14]; + state[10] = v; + state[14] = u; + v = state[3]; + u = state[7]; + t = state[11]; + state[3] = state[15]; + state[7] = v; + state[11] = u; + state[15] = t; + //MixColumns + for (var j = 0; j < 16; j += 4) { + var s0 = state[j + 0], s1 = state[j + 1]; + var s2 = state[j + 2], s3 = state[j + 3]; + t = s0 ^ s1 ^ s2 ^ s3; + state[j + 0] ^= t ^ mixCol[s0 ^ s1]; + state[j + 1] ^= t ^ mixCol[s1 ^ s2]; + state[j + 2] ^= t ^ mixCol[s2 ^ s3]; + state[j + 3] ^= t ^ mixCol[s3 ^ s0]; + } + //AddRoundKey + for (j = 0, k = i * 16; j < 16; ++j, ++k) { + state[j] ^= key[k]; + } + } -var RefSetCache = (function RefSetCacheClosure() { - function RefSetCache() { - this.dict = Object.create(null); + //SubBytes + for (j = 0; j < 16; ++j) { + state[j] = s[state[j]]; + } + //ShiftRows + v = state[1]; + state[1] = state[5]; + state[5] = state[9]; + state[9] = state[13]; + state[13] = v; + v = state[2]; + u = state[6]; + state[2] = state[10]; + state[6] = state[14]; + state[10] = v; + state[14] = u; + v = state[3]; + u = state[7]; + t = state[11]; + state[3] = state[15]; + state[7] = v; + state[11] = u; + state[15] = t; + //AddRoundKey + for (j = 0, k = 160; j < 16; ++j, ++k) { + state[j] ^= key[k]; + } + return state; } - RefSetCache.prototype = { - get: function RefSetCache_get(ref) { - return this.dict[ref.toString()]; - }, - - has: function RefSetCache_has(ref) { - return ref.toString() in this.dict; - }, + function AES128Cipher(key) { + this.key = expandKey128(key); + this.buffer = new Uint8Array(16); + this.bufferPosition = 0; + } - put: function RefSetCache_put(ref, obj) { - this.dict[ref.toString()] = obj; - }, + function decryptBlock2(data, finalize) { + var i, j, ii, sourceLength = data.length, + buffer = this.buffer, bufferLength = this.bufferPosition, + result = [], iv = this.iv; + for (i = 0; i < sourceLength; ++i) { + buffer[bufferLength] = data[i]; + ++bufferLength; + if (bufferLength < 16) { + continue; + } + // buffer is full, decrypting + var plain = decrypt128(buffer, this.key); + // xor-ing the IV vector to get plain text + for (j = 0; j < 16; ++j) { + plain[j] ^= iv[j]; + } + iv = buffer; + result.push(plain); + buffer = new Uint8Array(16); + bufferLength = 0; + } + // saving incomplete buffer + this.buffer = buffer; + this.bufferLength = bufferLength; + this.iv = iv; + if (result.length === 0) { + return new Uint8Array([]); + } + // combining plain text blocks into one + var outputLength = 16 * result.length; + if (finalize) { + // undo a padding that is described in RFC 2898 + var lastBlock = result[result.length - 1]; + var psLen = lastBlock[15]; + if (psLen <= 16) { + for (i = 15, ii = 16 - psLen; i >= ii; --i) { + if (lastBlock[i] !== psLen) { + // Invalid padding, assume that the block has no padding. + psLen = 0; + break; + } + } + outputLength -= psLen; + result[result.length - 1] = lastBlock.subarray(0, 16 - psLen); + } + } + var output = new Uint8Array(outputLength); + for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { + output.set(result[i], j); + } + return output; + } - putAlias: function RefSetCache_putAlias(ref, aliasRef) { - this.dict[ref.toString()] = this.get(aliasRef); + AES128Cipher.prototype = { + decryptBlock: function AES128Cipher_decryptBlock(data, finalize) { + var i, sourceLength = data.length; + var buffer = this.buffer, bufferLength = this.bufferPosition; + // waiting for IV values -- they are at the start of the stream + for (i = 0; bufferLength < 16 && i < sourceLength; ++i, ++bufferLength) { + buffer[bufferLength] = data[i]; + } + if (bufferLength < 16) { + // need more data + this.bufferLength = bufferLength; + return new Uint8Array([]); + } + this.iv = buffer; + this.buffer = new Uint8Array(16); + this.bufferLength = 0; + // starting decryption + this.decryptBlock = decryptBlock2; + return this.decryptBlock(data.subarray(16), finalize); }, + encrypt: function AES128Cipher_encrypt(data, iv) { + var i, j, ii, sourceLength = data.length, + buffer = this.buffer, bufferLength = this.bufferPosition, + result = []; + if (!iv) { + iv = new Uint8Array(16); + } + for (i = 0; i < sourceLength; ++i) { + buffer[bufferLength] = data[i]; + ++bufferLength; + if (bufferLength < 16) { + continue; + } + for (j = 0; j < 16; ++j) { + buffer[j] ^= iv[j]; + } - forEach: function RefSetCache_forEach(fn, thisArg) { - for (var i in this.dict) { - fn.call(thisArg, this.dict[i]); + // buffer is full, encrypting + var cipher = encrypt128(buffer, this.key); + iv = cipher; + result.push(cipher); + buffer = new Uint8Array(16); + bufferLength = 0; } - }, - - clear: function RefSetCache_clear() { - this.dict = Object.create(null); + // saving incomplete buffer + this.buffer = buffer; + this.bufferLength = bufferLength; + this.iv = iv; + if (result.length === 0) { + return new Uint8Array([]); + } + // combining plain text blocks into one + var outputLength = 16 * result.length; + var output = new Uint8Array(outputLength); + for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { + output.set(result[i], j); + } + return output; } }; - return RefSetCache; + return AES128Cipher; })(); -function isName(v) { - return v instanceof Name; -} - -function isCmd(v, cmd) { - return v instanceof Cmd && (cmd === undefined || v.cmd === cmd); -} - -function isDict(v, type) { - if (!(v instanceof Dict)) { - return false; - } - if (!type) { - return true; - } - var dictType = v.get('Type'); - return isName(dictType) && dictType.name === type; -} - -function isRef(v) { - return v instanceof Ref; -} - -function isStream(v) { - return typeof v === 'object' && v !== null && v.getBytes !== undefined; -} +var AES256Cipher = (function AES256CipherClosure() { + var rcon = new Uint8Array([ + 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, + 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, + 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, + 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, + 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, + 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, + 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, + 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, + 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, + 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, + 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, + 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, + 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, + 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, + 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, + 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, + 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, + 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, + 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, + 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, + 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, + 0x74, 0xe8, 0xcb, 0x8d]); -exports.Cmd = Cmd; -exports.Dict = Dict; -exports.Name = Name; -exports.Ref = Ref; -exports.RefSet = RefSet; -exports.RefSetCache = RefSetCache; -exports.isCmd = isCmd; -exports.isDict = isDict; -exports.isName = isName; -exports.isRef = isRef; -exports.isStream = isStream; -})); + var s = new Uint8Array([ + 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, + 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, + 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, + 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, + 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, + 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, + 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, + 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, + 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, + 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, + 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, + 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, + 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, + 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, + 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, + 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, + 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, + 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, + 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, + 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, + 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, + 0xb0, 0x54, 0xbb, 0x16]); + var inv_s = new Uint8Array([ + 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, + 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, + 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, + 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, + 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, + 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, + 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, + 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, + 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, + 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, + 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, + 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, + 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, + 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, + 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, + 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, + 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, + 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, + 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, + 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, + 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, + 0x55, 0x21, 0x0c, 0x7d]); -(function (root, factory) { - { - factory((root.pdfjsCoreStream = {}), root.pdfjsSharedUtil, - root.pdfjsCorePrimitives, root.pdfjsCoreJbig2, root.pdfjsCoreJpg, - root.pdfjsCoreJpx); + var mixCol = new Uint8Array(256); + for (var i = 0; i < 256; i++) { + if (i < 128) { + mixCol[i] = i << 1; + } else { + mixCol[i] = (i << 1) ^ 0x1b; + } } -}(this, function (exports, sharedUtil, corePrimitives, coreJbig2, coreJpg, - coreJpx) { - -var Util = sharedUtil.Util; -var error = sharedUtil.error; -var info = sharedUtil.info; -var isArray = sharedUtil.isArray; -var shadow = sharedUtil.shadow; -var warn = sharedUtil.warn; -var Dict = corePrimitives.Dict; -var Jbig2Image = coreJbig2.Jbig2Image; -var JpegImage = coreJpg.JpegImage; -var JpxImage = coreJpx.JpxImage; + var mix = new Uint32Array([ + 0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, + 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, + 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, + 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, + 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, + 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, + 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, + 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, + 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, + 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, + 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, + 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, + 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, + 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, + 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, + 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, + 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, + 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, + 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, + 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, + 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, + 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, + 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, + 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, + 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, + 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, + 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, + 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, + 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, + 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, + 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, + 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, + 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, + 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, + 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, + 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, + 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, + 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, + 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, + 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, + 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, + 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, + 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3]); -var coreParser; // see _setCoreParser below -var EOF; // = coreParser.EOF; -var Lexer; // = coreParser.Lexer; + function expandKey256(cipherKey) { + var b = 240, result = new Uint8Array(b); + var r = 1; -var coreColorSpace; // see _setCoreColorSpace below -var ColorSpace; // = coreColorSpace.ColorSpace; + result.set(cipherKey); + for (var j = 32, i = 1; j < b; ++i) { + if (j % 32 === 16) { + t1 = s[t1]; + t2 = s[t2]; + t3 = s[t3]; + t4 = s[t4]; + } else if (j % 32 === 0) { + // RotWord + var t1 = result[j - 3], t2 = result[j - 2], + t3 = result[j - 1], t4 = result[j - 4]; + // SubWord + t1 = s[t1]; + t2 = s[t2]; + t3 = s[t3]; + t4 = s[t4]; + // Rcon + t1 = t1 ^ r; + if ((r <<= 1) >= 256) { + r = (r ^ 0x1b) & 0xFF; + } + } -var Stream = (function StreamClosure() { - function Stream(arrayBuffer, start, length, dict) { - this.bytes = (arrayBuffer instanceof Uint8Array ? - arrayBuffer : new Uint8Array(arrayBuffer)); - this.start = start || 0; - this.pos = this.start; - this.end = (start + length) || this.bytes.length; - this.dict = dict; + for (var n = 0; n < 4; ++n) { + result[j] = (t1 ^= result[j - 32]); + j++; + result[j] = (t2 ^= result[j - 32]); + j++; + result[j] = (t3 ^= result[j - 32]); + j++; + result[j] = (t4 ^= result[j - 32]); + j++; + } + } + return result; } - // required methods for a stream. if a particular stream does not - // implement these, an error should be thrown - Stream.prototype = { - get length() { - return this.end - this.start; - }, - get isEmpty() { - return this.length === 0; - }, - getByte: function Stream_getByte() { - if (this.pos >= this.end) { - return -1; + function decrypt256(input, key) { + var state = new Uint8Array(16); + state.set(input); + var i, j, k; + var t, u, v; + // AddRoundKey + for (j = 0, k = 224; j < 16; ++j, ++k) { + state[j] ^= key[k]; + } + for (i = 13; i >= 1; --i) { + // InvShiftRows + t = state[13]; + state[13] = state[9]; + state[9] = state[5]; + state[5] = state[1]; + state[1] = t; + t = state[14]; + u = state[10]; + state[14] = state[6]; + state[10] = state[2]; + state[6] = t; + state[2] = u; + t = state[15]; + u = state[11]; + v = state[7]; + state[15] = state[3]; + state[11] = t; + state[7] = u; + state[3] = v; + // InvSubBytes + for (j = 0; j < 16; ++j) { + state[j] = inv_s[state[j]]; } - return this.bytes[this.pos++]; - }, - getUint16: function Stream_getUint16() { - var b0 = this.getByte(); - var b1 = this.getByte(); - if (b0 === -1 || b1 === -1) { - return -1; + // AddRoundKey + for (j = 0, k = i * 16; j < 16; ++j, ++k) { + state[j] ^= key[k]; } - return (b0 << 8) + b1; - }, - getInt32: function Stream_getInt32() { - var b0 = this.getByte(); - var b1 = this.getByte(); - var b2 = this.getByte(); - var b3 = this.getByte(); - return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; - }, - // returns subarray of original buffer - // should only be read - getBytes: function Stream_getBytes(length) { - var bytes = this.bytes; - var pos = this.pos; - var strEnd = this.end; + // InvMixColumns + for (j = 0; j < 16; j += 4) { + var s0 = mix[state[j]], s1 = mix[state[j + 1]], + s2 = mix[state[j + 2]], s3 = mix[state[j + 3]]; + t = (s0 ^ (s1 >>> 8) ^ (s1 << 24) ^ (s2 >>> 16) ^ (s2 << 16) ^ + (s3 >>> 24) ^ (s3 << 8)); + state[j] = (t >>> 24) & 0xFF; + state[j + 1] = (t >> 16) & 0xFF; + state[j + 2] = (t >> 8) & 0xFF; + state[j + 3] = t & 0xFF; + } + } + // InvShiftRows + t = state[13]; + state[13] = state[9]; + state[9] = state[5]; + state[5] = state[1]; + state[1] = t; + t = state[14]; + u = state[10]; + state[14] = state[6]; + state[10] = state[2]; + state[6] = t; + state[2] = u; + t = state[15]; + u = state[11]; + v = state[7]; + state[15] = state[3]; + state[11] = t; + state[7] = u; + state[3] = v; + for (j = 0; j < 16; ++j) { + // InvSubBytes + state[j] = inv_s[state[j]]; + // AddRoundKey + state[j] ^= key[j]; + } + return state; + } - if (!length) { - return bytes.subarray(pos, strEnd); + function encrypt256(input, key) { + var t, u, v, k; + var state = new Uint8Array(16); + state.set(input); + for (j = 0; j < 16; ++j) { + // AddRoundKey + state[j] ^= key[j]; + } + + for (i = 1; i < 14; i++) { + //SubBytes + for (j = 0; j < 16; ++j) { + state[j] = s[state[j]]; } - var end = pos + length; - if (end > strEnd) { - end = strEnd; + //ShiftRows + v = state[1]; + state[1] = state[5]; + state[5] = state[9]; + state[9] = state[13]; + state[13] = v; + v = state[2]; + u = state[6]; + state[2] = state[10]; + state[6] = state[14]; + state[10] = v; + state[14] = u; + v = state[3]; + u = state[7]; + t = state[11]; + state[3] = state[15]; + state[7] = v; + state[11] = u; + state[15] = t; + //MixColumns + for (var j = 0; j < 16; j += 4) { + var s0 = state[j + 0], s1 = state[j + 1]; + var s2 = state[j + 2], s3 = state[j + 3]; + t = s0 ^ s1 ^ s2 ^ s3; + state[j + 0] ^= t ^ mixCol[s0 ^ s1]; + state[j + 1] ^= t ^ mixCol[s1 ^ s2]; + state[j + 2] ^= t ^ mixCol[s2 ^ s3]; + state[j + 3] ^= t ^ mixCol[s3 ^ s0]; } - this.pos = end; - return bytes.subarray(pos, end); - }, - peekByte: function Stream_peekByte() { - var peekedByte = this.getByte(); - this.pos--; - return peekedByte; - }, - peekBytes: function Stream_peekBytes(length) { - var bytes = this.getBytes(length); - this.pos -= bytes.length; - return bytes; - }, - skip: function Stream_skip(n) { - if (!n) { - n = 1; + //AddRoundKey + for (j = 0, k = i * 16; j < 16; ++j, ++k) { + state[j] ^= key[k]; } - this.pos += n; - }, - reset: function Stream_reset() { - this.pos = this.start; - }, - moveStart: function Stream_moveStart() { - this.start = this.pos; - }, - makeSubStream: function Stream_makeSubStream(start, length, dict) { - return new Stream(this.bytes.buffer, start, length, dict); - }, - isStream: true - }; - - return Stream; -})(); + } -var StringStream = (function StringStreamClosure() { - function StringStream(str) { - var length = str.length; - var bytes = new Uint8Array(length); - for (var n = 0; n < length; ++n) { - bytes[n] = str.charCodeAt(n); + //SubBytes + for (j = 0; j < 16; ++j) { + state[j] = s[state[j]]; + } + //ShiftRows + v = state[1]; + state[1] = state[5]; + state[5] = state[9]; + state[9] = state[13]; + state[13] = v; + v = state[2]; + u = state[6]; + state[2] = state[10]; + state[6] = state[14]; + state[10] = v; + state[14] = u; + v = state[3]; + u = state[7]; + t = state[11]; + state[3] = state[15]; + state[7] = v; + state[11] = u; + state[15] = t; + //AddRoundKey + for (j = 0, k = 224; j < 16; ++j, ++k) { + state[j] ^= key[k]; } - Stream.call(this, bytes); - } - StringStream.prototype = Stream.prototype; + return state; - return StringStream; -})(); + } -// super class for the decoding streams -var DecodeStream = (function DecodeStreamClosure() { - // Lots of DecodeStreams are created whose buffers are never used. For these - // we share a single empty buffer. This is (a) space-efficient and (b) avoids - // having special cases that would be required if we used |null| for an empty - // buffer. - var emptyBuffer = new Uint8Array(0); + function AES256Cipher(key) { + this.key = expandKey256(key); + this.buffer = new Uint8Array(16); + this.bufferPosition = 0; + } - function DecodeStream(maybeMinBufferLength) { - this.pos = 0; - this.bufferLength = 0; - this.eof = false; - this.buffer = emptyBuffer; - this.minBufferLength = 512; - if (maybeMinBufferLength) { - // Compute the first power of two that is as big as maybeMinBufferLength. - while (this.minBufferLength < maybeMinBufferLength) { - this.minBufferLength *= 2; + function decryptBlock2(data, finalize) { + var i, j, ii, sourceLength = data.length, + buffer = this.buffer, bufferLength = this.bufferPosition, + result = [], iv = this.iv; + + for (i = 0; i < sourceLength; ++i) { + buffer[bufferLength] = data[i]; + ++bufferLength; + if (bufferLength < 16) { + continue; + } + // buffer is full, decrypting + var plain = decrypt256(buffer, this.key); + // xor-ing the IV vector to get plain text + for (j = 0; j < 16; ++j) { + plain[j] ^= iv[j]; + } + iv = buffer; + result.push(plain); + buffer = new Uint8Array(16); + bufferLength = 0; + } + // saving incomplete buffer + this.buffer = buffer; + this.bufferLength = bufferLength; + this.iv = iv; + if (result.length === 0) { + return new Uint8Array([]); + } + // combining plain text blocks into one + var outputLength = 16 * result.length; + if (finalize) { + // undo a padding that is described in RFC 2898 + var lastBlock = result[result.length - 1]; + var psLen = lastBlock[15]; + if (psLen <= 16) { + for (i = 15, ii = 16 - psLen; i >= ii; --i) { + if (lastBlock[i] !== psLen) { + // Invalid padding, assume that the block has no padding. + psLen = 0; + break; + } + } + outputLength -= psLen; + result[result.length - 1] = lastBlock.subarray(0, 16 - psLen); } } + var output = new Uint8Array(outputLength); + for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { + output.set(result[i], j); + } + return output; + } - DecodeStream.prototype = { - get isEmpty() { - while (!this.eof && this.bufferLength === 0) { - this.readBlock(); - } - return this.bufferLength === 0; - }, - ensureBuffer: function DecodeStream_ensureBuffer(requested) { - var buffer = this.buffer; - if (requested <= buffer.byteLength) { - return buffer; - } - var size = this.minBufferLength; - while (size < requested) { - size *= 2; - } - var buffer2 = new Uint8Array(size); - buffer2.set(buffer); - return (this.buffer = buffer2); - }, - getByte: function DecodeStream_getByte() { - var pos = this.pos; - while (this.bufferLength <= pos) { - if (this.eof) { - return -1; + AES256Cipher.prototype = { + decryptBlock: function AES256Cipher_decryptBlock(data, finalize, iv) { + var i, sourceLength = data.length; + var buffer = this.buffer, bufferLength = this.bufferPosition; + // if not supplied an IV wait for IV values + // they are at the start of the stream + if (iv) { + this.iv = iv; + } else { + for (i = 0; bufferLength < 16 && + i < sourceLength; ++i, ++bufferLength) { + buffer[bufferLength] = data[i]; } - this.readBlock(); + if (bufferLength < 16) { + //need more data + this.bufferLength = bufferLength; + return new Uint8Array([]); + } + this.iv = buffer; + data = data.subarray(16); } - return this.buffer[this.pos++]; + this.buffer = new Uint8Array(16); + this.bufferLength = 0; + // starting decryption + this.decryptBlock = decryptBlock2; + return this.decryptBlock(data, finalize); }, - getUint16: function DecodeStream_getUint16() { - var b0 = this.getByte(); - var b1 = this.getByte(); - if (b0 === -1 || b1 === -1) { - return -1; + encrypt: function AES256Cipher_encrypt(data, iv) { + var i, j, ii, sourceLength = data.length, + buffer = this.buffer, bufferLength = this.bufferPosition, + result = []; + if (!iv) { + iv = new Uint8Array(16); } - return (b0 << 8) + b1; - }, - getInt32: function DecodeStream_getInt32() { - var b0 = this.getByte(); - var b1 = this.getByte(); - var b2 = this.getByte(); - var b3 = this.getByte(); - return (b0 << 24) + (b1 << 16) + (b2 << 8) + b3; - }, - getBytes: function DecodeStream_getBytes(length) { - var end, pos = this.pos; - - if (length) { - this.ensureBuffer(pos + length); - end = pos + length; - - while (!this.eof && this.bufferLength < end) { - this.readBlock(); - } - var bufEnd = this.bufferLength; - if (end > bufEnd) { - end = bufEnd; + for (i = 0; i < sourceLength; ++i) { + buffer[bufferLength] = data[i]; + ++bufferLength; + if (bufferLength < 16) { + continue; } - } else { - while (!this.eof) { - this.readBlock(); + for (j = 0; j < 16; ++j) { + buffer[j] ^= iv[j]; } - end = this.bufferLength; - } - this.pos = end; - return this.buffer.subarray(pos, end); - }, - peekByte: function DecodeStream_peekByte() { - var peekedByte = this.getByte(); - this.pos--; - return peekedByte; - }, - peekBytes: function DecodeStream_peekBytes(length) { - var bytes = this.getBytes(length); - this.pos -= bytes.length; - return bytes; - }, - makeSubStream: function DecodeStream_makeSubStream(start, length, dict) { - var end = start + length; - while (this.bufferLength <= end && !this.eof) { - this.readBlock(); + // buffer is full, encrypting + var cipher = encrypt256(buffer, this.key); + this.iv = cipher; + result.push(cipher); + buffer = new Uint8Array(16); + bufferLength = 0; } - return new Stream(this.buffer, start, length, dict); - }, - skip: function DecodeStream_skip(n) { - if (!n) { - n = 1; + // saving incomplete buffer + this.buffer = buffer; + this.bufferLength = bufferLength; + this.iv = iv; + if (result.length === 0) { + return new Uint8Array([]); } - this.pos += n; - }, - reset: function DecodeStream_reset() { - this.pos = 0; - }, - getBaseStreams: function DecodeStream_getBaseStreams() { - if (this.str && this.str.getBaseStreams) { - return this.str.getBaseStreams(); + // combining plain text blocks into one + var outputLength = 16 * result.length; + var output = new Uint8Array(outputLength); + for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { + output.set(result[i], j); } - return []; + return output; } }; - return DecodeStream; + return AES256Cipher; })(); -var StreamsSequenceStream = (function StreamsSequenceStreamClosure() { - function StreamsSequenceStream(streams) { - this.streams = streams; - DecodeStream.call(this, /* maybeLength = */ null); - } - - StreamsSequenceStream.prototype = Object.create(DecodeStream.prototype); - - StreamsSequenceStream.prototype.readBlock = - function streamSequenceStreamReadBlock() { +var PDF17 = (function PDF17Closure() { - var streams = this.streams; - if (streams.length === 0) { - this.eof = true; - return; + function compareByteArrays(array1, array2) { + if (array1.length !== array2.length) { + return false; } - var stream = streams.shift(); - var chunk = stream.getBytes(); - var bufferLength = this.bufferLength; - var newLength = bufferLength + chunk.length; - var buffer = this.ensureBuffer(newLength); - buffer.set(chunk, bufferLength); - this.bufferLength = newLength; - }; + for (var i = 0; i < array1.length; i++) { + if (array1[i] !== array2[i]) { + return false; + } + } + return true; + } - StreamsSequenceStream.prototype.getBaseStreams = - function StreamsSequenceStream_getBaseStreams() { + function PDF17() { + } - var baseStreams = []; - for (var i = 0, ii = this.streams.length; i < ii; i++) { - var stream = this.streams[i]; - if (stream.getBaseStreams) { - Util.appendToArray(baseStreams, stream.getBaseStreams()); - } + PDF17.prototype = { + checkOwnerPassword: function PDF17_checkOwnerPassword(password, + ownerValidationSalt, + userBytes, + ownerPassword) { + var hashData = new Uint8Array(password.length + 56); + hashData.set(password, 0); + hashData.set(ownerValidationSalt, password.length); + hashData.set(userBytes, password.length + ownerValidationSalt.length); + var result = calculateSHA256(hashData, 0, hashData.length); + return compareByteArrays(result, ownerPassword); + }, + checkUserPassword: function PDF17_checkUserPassword(password, + userValidationSalt, + userPassword) { + var hashData = new Uint8Array(password.length + 8); + hashData.set(password, 0); + hashData.set(userValidationSalt, password.length); + var result = calculateSHA256(hashData, 0, hashData.length); + return compareByteArrays(result, userPassword); + }, + getOwnerKey: function PDF17_getOwnerKey(password, ownerKeySalt, userBytes, + ownerEncryption) { + var hashData = new Uint8Array(password.length + 56); + hashData.set(password, 0); + hashData.set(ownerKeySalt, password.length); + hashData.set(userBytes, password.length + ownerKeySalt.length); + var key = calculateSHA256(hashData, 0, hashData.length); + var cipher = new AES256Cipher(key); + return cipher.decryptBlock(ownerEncryption, + false, + new Uint8Array(16)); + + }, + getUserKey: function PDF17_getUserKey(password, userKeySalt, + userEncryption) { + var hashData = new Uint8Array(password.length + 8); + hashData.set(password, 0); + hashData.set(userKeySalt, password.length); + //key is the decryption key for the UE string + var key = calculateSHA256(hashData, 0, hashData.length); + var cipher = new AES256Cipher(key); + return cipher.decryptBlock(userEncryption, + false, + new Uint8Array(16)); } - return baseStreams; }; - - return StreamsSequenceStream; + return PDF17; })(); -var FlateStream = (function FlateStreamClosure() { - var codeLenCodeMap = new Int32Array([ - 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 - ]); - - var lengthDecode = new Int32Array([ - 0x00003, 0x00004, 0x00005, 0x00006, 0x00007, 0x00008, 0x00009, 0x0000a, - 0x1000b, 0x1000d, 0x1000f, 0x10011, 0x20013, 0x20017, 0x2001b, 0x2001f, - 0x30023, 0x3002b, 0x30033, 0x3003b, 0x40043, 0x40053, 0x40063, 0x40073, - 0x50083, 0x500a3, 0x500c3, 0x500e3, 0x00102, 0x00102, 0x00102 - ]); +var PDF20 = (function PDF20Closure() { - var distDecode = new Int32Array([ - 0x00001, 0x00002, 0x00003, 0x00004, 0x10005, 0x10007, 0x20009, 0x2000d, - 0x30011, 0x30019, 0x40021, 0x40031, 0x50041, 0x50061, 0x60081, 0x600c1, - 0x70101, 0x70181, 0x80201, 0x80301, 0x90401, 0x90601, 0xa0801, 0xa0c01, - 0xb1001, 0xb1801, 0xc2001, 0xc3001, 0xd4001, 0xd6001 - ]); + function concatArrays(array1, array2) { + var t = new Uint8Array(array1.length + array2.length); + t.set(array1, 0); + t.set(array2, array1.length); + return t; + } - var fixedLitCodeTab = [new Int32Array([ - 0x70100, 0x80050, 0x80010, 0x80118, 0x70110, 0x80070, 0x80030, 0x900c0, - 0x70108, 0x80060, 0x80020, 0x900a0, 0x80000, 0x80080, 0x80040, 0x900e0, - 0x70104, 0x80058, 0x80018, 0x90090, 0x70114, 0x80078, 0x80038, 0x900d0, - 0x7010c, 0x80068, 0x80028, 0x900b0, 0x80008, 0x80088, 0x80048, 0x900f0, - 0x70102, 0x80054, 0x80014, 0x8011c, 0x70112, 0x80074, 0x80034, 0x900c8, - 0x7010a, 0x80064, 0x80024, 0x900a8, 0x80004, 0x80084, 0x80044, 0x900e8, - 0x70106, 0x8005c, 0x8001c, 0x90098, 0x70116, 0x8007c, 0x8003c, 0x900d8, - 0x7010e, 0x8006c, 0x8002c, 0x900b8, 0x8000c, 0x8008c, 0x8004c, 0x900f8, - 0x70101, 0x80052, 0x80012, 0x8011a, 0x70111, 0x80072, 0x80032, 0x900c4, - 0x70109, 0x80062, 0x80022, 0x900a4, 0x80002, 0x80082, 0x80042, 0x900e4, - 0x70105, 0x8005a, 0x8001a, 0x90094, 0x70115, 0x8007a, 0x8003a, 0x900d4, - 0x7010d, 0x8006a, 0x8002a, 0x900b4, 0x8000a, 0x8008a, 0x8004a, 0x900f4, - 0x70103, 0x80056, 0x80016, 0x8011e, 0x70113, 0x80076, 0x80036, 0x900cc, - 0x7010b, 0x80066, 0x80026, 0x900ac, 0x80006, 0x80086, 0x80046, 0x900ec, - 0x70107, 0x8005e, 0x8001e, 0x9009c, 0x70117, 0x8007e, 0x8003e, 0x900dc, - 0x7010f, 0x8006e, 0x8002e, 0x900bc, 0x8000e, 0x8008e, 0x8004e, 0x900fc, - 0x70100, 0x80051, 0x80011, 0x80119, 0x70110, 0x80071, 0x80031, 0x900c2, - 0x70108, 0x80061, 0x80021, 0x900a2, 0x80001, 0x80081, 0x80041, 0x900e2, - 0x70104, 0x80059, 0x80019, 0x90092, 0x70114, 0x80079, 0x80039, 0x900d2, - 0x7010c, 0x80069, 0x80029, 0x900b2, 0x80009, 0x80089, 0x80049, 0x900f2, - 0x70102, 0x80055, 0x80015, 0x8011d, 0x70112, 0x80075, 0x80035, 0x900ca, - 0x7010a, 0x80065, 0x80025, 0x900aa, 0x80005, 0x80085, 0x80045, 0x900ea, - 0x70106, 0x8005d, 0x8001d, 0x9009a, 0x70116, 0x8007d, 0x8003d, 0x900da, - 0x7010e, 0x8006d, 0x8002d, 0x900ba, 0x8000d, 0x8008d, 0x8004d, 0x900fa, - 0x70101, 0x80053, 0x80013, 0x8011b, 0x70111, 0x80073, 0x80033, 0x900c6, - 0x70109, 0x80063, 0x80023, 0x900a6, 0x80003, 0x80083, 0x80043, 0x900e6, - 0x70105, 0x8005b, 0x8001b, 0x90096, 0x70115, 0x8007b, 0x8003b, 0x900d6, - 0x7010d, 0x8006b, 0x8002b, 0x900b6, 0x8000b, 0x8008b, 0x8004b, 0x900f6, - 0x70103, 0x80057, 0x80017, 0x8011f, 0x70113, 0x80077, 0x80037, 0x900ce, - 0x7010b, 0x80067, 0x80027, 0x900ae, 0x80007, 0x80087, 0x80047, 0x900ee, - 0x70107, 0x8005f, 0x8001f, 0x9009e, 0x70117, 0x8007f, 0x8003f, 0x900de, - 0x7010f, 0x8006f, 0x8002f, 0x900be, 0x8000f, 0x8008f, 0x8004f, 0x900fe, - 0x70100, 0x80050, 0x80010, 0x80118, 0x70110, 0x80070, 0x80030, 0x900c1, - 0x70108, 0x80060, 0x80020, 0x900a1, 0x80000, 0x80080, 0x80040, 0x900e1, - 0x70104, 0x80058, 0x80018, 0x90091, 0x70114, 0x80078, 0x80038, 0x900d1, - 0x7010c, 0x80068, 0x80028, 0x900b1, 0x80008, 0x80088, 0x80048, 0x900f1, - 0x70102, 0x80054, 0x80014, 0x8011c, 0x70112, 0x80074, 0x80034, 0x900c9, - 0x7010a, 0x80064, 0x80024, 0x900a9, 0x80004, 0x80084, 0x80044, 0x900e9, - 0x70106, 0x8005c, 0x8001c, 0x90099, 0x70116, 0x8007c, 0x8003c, 0x900d9, - 0x7010e, 0x8006c, 0x8002c, 0x900b9, 0x8000c, 0x8008c, 0x8004c, 0x900f9, - 0x70101, 0x80052, 0x80012, 0x8011a, 0x70111, 0x80072, 0x80032, 0x900c5, - 0x70109, 0x80062, 0x80022, 0x900a5, 0x80002, 0x80082, 0x80042, 0x900e5, - 0x70105, 0x8005a, 0x8001a, 0x90095, 0x70115, 0x8007a, 0x8003a, 0x900d5, - 0x7010d, 0x8006a, 0x8002a, 0x900b5, 0x8000a, 0x8008a, 0x8004a, 0x900f5, - 0x70103, 0x80056, 0x80016, 0x8011e, 0x70113, 0x80076, 0x80036, 0x900cd, - 0x7010b, 0x80066, 0x80026, 0x900ad, 0x80006, 0x80086, 0x80046, 0x900ed, - 0x70107, 0x8005e, 0x8001e, 0x9009d, 0x70117, 0x8007e, 0x8003e, 0x900dd, - 0x7010f, 0x8006e, 0x8002e, 0x900bd, 0x8000e, 0x8008e, 0x8004e, 0x900fd, - 0x70100, 0x80051, 0x80011, 0x80119, 0x70110, 0x80071, 0x80031, 0x900c3, - 0x70108, 0x80061, 0x80021, 0x900a3, 0x80001, 0x80081, 0x80041, 0x900e3, - 0x70104, 0x80059, 0x80019, 0x90093, 0x70114, 0x80079, 0x80039, 0x900d3, - 0x7010c, 0x80069, 0x80029, 0x900b3, 0x80009, 0x80089, 0x80049, 0x900f3, - 0x70102, 0x80055, 0x80015, 0x8011d, 0x70112, 0x80075, 0x80035, 0x900cb, - 0x7010a, 0x80065, 0x80025, 0x900ab, 0x80005, 0x80085, 0x80045, 0x900eb, - 0x70106, 0x8005d, 0x8001d, 0x9009b, 0x70116, 0x8007d, 0x8003d, 0x900db, - 0x7010e, 0x8006d, 0x8002d, 0x900bb, 0x8000d, 0x8008d, 0x8004d, 0x900fb, - 0x70101, 0x80053, 0x80013, 0x8011b, 0x70111, 0x80073, 0x80033, 0x900c7, - 0x70109, 0x80063, 0x80023, 0x900a7, 0x80003, 0x80083, 0x80043, 0x900e7, - 0x70105, 0x8005b, 0x8001b, 0x90097, 0x70115, 0x8007b, 0x8003b, 0x900d7, - 0x7010d, 0x8006b, 0x8002b, 0x900b7, 0x8000b, 0x8008b, 0x8004b, 0x900f7, - 0x70103, 0x80057, 0x80017, 0x8011f, 0x70113, 0x80077, 0x80037, 0x900cf, - 0x7010b, 0x80067, 0x80027, 0x900af, 0x80007, 0x80087, 0x80047, 0x900ef, - 0x70107, 0x8005f, 0x8001f, 0x9009f, 0x70117, 0x8007f, 0x8003f, 0x900df, - 0x7010f, 0x8006f, 0x8002f, 0x900bf, 0x8000f, 0x8008f, 0x8004f, 0x900ff - ]), 9]; + function calculatePDF20Hash(password, input, userBytes) { + //This refers to Algorithm 2.B as defined in ISO 32000-2 + var k = calculateSHA256(input, 0, input.length).subarray(0, 32); + var e = [0]; + var i = 0; + while (i < 64 || e[e.length - 1] > i - 32) { + var arrayLength = password.length + k.length + userBytes.length; - var fixedDistCodeTab = [new Int32Array([ - 0x50000, 0x50010, 0x50008, 0x50018, 0x50004, 0x50014, 0x5000c, 0x5001c, - 0x50002, 0x50012, 0x5000a, 0x5001a, 0x50006, 0x50016, 0x5000e, 0x00000, - 0x50001, 0x50011, 0x50009, 0x50019, 0x50005, 0x50015, 0x5000d, 0x5001d, - 0x50003, 0x50013, 0x5000b, 0x5001b, 0x50007, 0x50017, 0x5000f, 0x00000 - ]), 5]; + var k1 = new Uint8Array(arrayLength * 64); + var array = concatArrays(password, k); + array = concatArrays(array, userBytes); + for (var j = 0, pos = 0; j < 64; j++, pos += arrayLength) { + k1.set(array, pos); + } + //AES128 CBC NO PADDING with + //first 16 bytes of k as the key and the second 16 as the iv. + var cipher = new AES128Cipher(k.subarray(0, 16)); + e = cipher.encrypt(k1, k.subarray(16, 32)); + //Now we have to take the first 16 bytes of an unsigned + //big endian integer... and compute the remainder + //modulo 3.... That is a fairly large number and + //JavaScript isn't going to handle that well... + //So we're using a trick that allows us to perform + //modulo math byte by byte + var remainder = 0; + for (var z = 0; z < 16; z++) { + remainder *= (256 % 3); + remainder %= 3; + remainder += ((e[z] >>> 0) % 3); + remainder %= 3; + } + if (remainder === 0) { + k = calculateSHA256(e, 0, e.length); + } + else if (remainder === 1) { + k = calculateSHA384(e, 0, e.length); + } + else if (remainder === 2) { + k = calculateSHA512(e, 0, e.length); + } + i++; + } + return k.subarray(0, 32); + } - function FlateStream(str, maybeLength) { - this.str = str; - this.dict = str.dict; + function PDF20() { + } - var cmf = str.getByte(); - var flg = str.getByte(); - if (cmf === -1 || flg === -1) { - error('Invalid header in flate stream: ' + cmf + ', ' + flg); - } - if ((cmf & 0x0f) !== 0x08) { - error('Unknown compression method in flate stream: ' + cmf + ', ' + flg); - } - if ((((cmf << 8) + flg) % 31) !== 0) { - error('Bad FCHECK in flate stream: ' + cmf + ', ' + flg); + function compareByteArrays(array1, array2) { + if (array1.length !== array2.length) { + return false; } - if (flg & 0x20) { - error('FDICT bit set in flate stream: ' + cmf + ', ' + flg); + for (var i = 0; i < array1.length; i++) { + if (array1[i] !== array2[i]) { + return false; + } } - - this.codeSize = 0; - this.codeBuf = 0; - - DecodeStream.call(this, maybeLength); + return true; } - FlateStream.prototype = Object.create(DecodeStream.prototype); - - FlateStream.prototype.getBits = function FlateStream_getBits(bits) { - var str = this.str; - var codeSize = this.codeSize; - var codeBuf = this.codeBuf; + PDF20.prototype = { + hash: function PDF20_hash(password, concatBytes, userBytes) { + return calculatePDF20Hash(password, concatBytes, userBytes); + }, + checkOwnerPassword: function PDF20_checkOwnerPassword(password, + ownerValidationSalt, + userBytes, + ownerPassword) { + var hashData = new Uint8Array(password.length + 56); + hashData.set(password, 0); + hashData.set(ownerValidationSalt, password.length); + hashData.set(userBytes, password.length + ownerValidationSalt.length); + var result = calculatePDF20Hash(password, hashData, userBytes); + return compareByteArrays(result, ownerPassword); + }, + checkUserPassword: function PDF20_checkUserPassword(password, + userValidationSalt, + userPassword) { + var hashData = new Uint8Array(password.length + 8); + hashData.set(password, 0); + hashData.set(userValidationSalt, password.length); + var result = calculatePDF20Hash(password, hashData, []); + return compareByteArrays(result, userPassword); + }, + getOwnerKey: function PDF20_getOwnerKey(password, ownerKeySalt, userBytes, + ownerEncryption) { + var hashData = new Uint8Array(password.length + 56); + hashData.set(password, 0); + hashData.set(ownerKeySalt, password.length); + hashData.set(userBytes, password.length + ownerKeySalt.length); + var key = calculatePDF20Hash(password, hashData, userBytes); + var cipher = new AES256Cipher(key); + return cipher.decryptBlock(ownerEncryption, + false, + new Uint8Array(16)); - var b; - while (codeSize < bits) { - if ((b = str.getByte()) === -1) { - error('Bad encoding in flate stream'); - } - codeBuf |= b << codeSize; - codeSize += 8; + }, + getUserKey: function PDF20_getUserKey(password, userKeySalt, + userEncryption) { + var hashData = new Uint8Array(password.length + 8); + hashData.set(password, 0); + hashData.set(userKeySalt, password.length); + //key is the decryption key for the UE string + var key = calculatePDF20Hash(password, hashData, []); + var cipher = new AES256Cipher(key); + return cipher.decryptBlock(userEncryption, + false, + new Uint8Array(16)); } - b = codeBuf & ((1 << bits) - 1); - this.codeBuf = codeBuf >> bits; - this.codeSize = codeSize -= bits; + }; + return PDF20; +})(); + +var CipherTransform = (function CipherTransformClosure() { + function CipherTransform(stringCipherConstructor, streamCipherConstructor) { + this.stringCipherConstructor = stringCipherConstructor; + this.streamCipherConstructor = streamCipherConstructor; + } - return b; + CipherTransform.prototype = { + createStream: function CipherTransform_createStream(stream, length) { + var cipher = new this.streamCipherConstructor(); + return new DecryptStream(stream, length, + function cipherTransformDecryptStream(data, finalize) { + return cipher.decryptBlock(data, finalize); + } + ); + }, + decryptString: function CipherTransform_decryptString(s) { + var cipher = new this.stringCipherConstructor(); + var data = stringToBytes(s); + data = cipher.decryptBlock(data, true); + return bytesToString(data); + } }; + return CipherTransform; +})(); - FlateStream.prototype.getCode = function FlateStream_getCode(table) { - var str = this.str; - var codes = table[0]; - var maxLen = table[1]; - var codeSize = this.codeSize; - var codeBuf = this.codeBuf; +var CipherTransformFactory = (function CipherTransformFactoryClosure() { + var defaultPasswordBytes = new Uint8Array([ + 0x28, 0xBF, 0x4E, 0x5E, 0x4E, 0x75, 0x8A, 0x41, + 0x64, 0x00, 0x4E, 0x56, 0xFF, 0xFA, 0x01, 0x08, + 0x2E, 0x2E, 0x00, 0xB6, 0xD0, 0x68, 0x3E, 0x80, + 0x2F, 0x0C, 0xA9, 0xFE, 0x64, 0x53, 0x69, 0x7A]); - var b; - while (codeSize < maxLen) { - if ((b = str.getByte()) === -1) { - // premature end of stream. code might however still be valid. - // codeSize < codeLen check below guards against incomplete codeVal. - break; - } - codeBuf |= (b << codeSize); - codeSize += 8; + function createEncryptionKey20(revision, password, ownerPassword, + ownerValidationSalt, ownerKeySalt, uBytes, + userPassword, userValidationSalt, userKeySalt, + ownerEncryption, userEncryption, perms) { + if (password) { + var passwordLength = Math.min(127, password.length); + password = password.subarray(0, passwordLength); + } else { + password = []; } - var code = codes[codeBuf & ((1 << maxLen) - 1)]; - var codeLen = code >> 16; - var codeVal = code & 0xffff; - if (codeLen < 1 || codeSize < codeLen) { - error('Bad encoding in flate stream'); + var pdfAlgorithm; + if (revision === 6) { + pdfAlgorithm = new PDF20(); + } else { + pdfAlgorithm = new PDF17(); } - this.codeBuf = (codeBuf >> codeLen); - this.codeSize = (codeSize - codeLen); - return codeVal; - }; - - FlateStream.prototype.generateHuffmanTable = - function flateStreamGenerateHuffmanTable(lengths) { - var n = lengths.length; - // find max code length - var maxLen = 0; - var i; - for (i = 0; i < n; ++i) { - if (lengths[i] > maxLen) { - maxLen = lengths[i]; + if (pdfAlgorithm) { + if (pdfAlgorithm.checkUserPassword(password, userValidationSalt, + userPassword)) { + return pdfAlgorithm.getUserKey(password, userKeySalt, userEncryption); + } else if (password.length && pdfAlgorithm.checkOwnerPassword(password, + ownerValidationSalt, + uBytes, + ownerPassword)) { + return pdfAlgorithm.getOwnerKey(password, ownerKeySalt, uBytes, + ownerEncryption); } } - // build the table - var size = 1 << maxLen; - var codes = new Int32Array(size); - for (var len = 1, code = 0, skip = 2; - len <= maxLen; - ++len, code <<= 1, skip <<= 1) { - for (var val = 0; val < n; ++val) { - if (lengths[val] === len) { - // bit-reverse the code - var code2 = 0; - var t = code; - for (i = 0; i < len; ++i) { - code2 = (code2 << 1) | (t & 1); - t >>= 1; - } + return null; + } - // fill the table entries - for (i = code2; i < size; i += skip) { - codes[i] = (len << 16) | val; - } - ++code; - } + function prepareKeyData(fileId, password, ownerPassword, userPassword, + flags, revision, keyLength, encryptMetadata) { + var hashDataSize = 40 + ownerPassword.length + fileId.length; + var hashData = new Uint8Array(hashDataSize), i = 0, j, n; + if (password) { + n = Math.min(32, password.length); + for (; i < n; ++i) { + hashData[i] = password[i]; } } - - return [codes, maxLen]; - }; - - FlateStream.prototype.readBlock = function FlateStream_readBlock() { - var buffer, len; - var str = this.str; - // read block header - var hdr = this.getBits(3); - if (hdr & 1) { - this.eof = true; + j = 0; + while (i < 32) { + hashData[i++] = defaultPasswordBytes[j++]; } - hdr >>= 1; - - if (hdr === 0) { // uncompressed block - var b; + // as now the padded password in the hashData[0..i] + for (j = 0, n = ownerPassword.length; j < n; ++j) { + hashData[i++] = ownerPassword[j]; + } + hashData[i++] = flags & 0xFF; + hashData[i++] = (flags >> 8) & 0xFF; + hashData[i++] = (flags >> 16) & 0xFF; + hashData[i++] = (flags >>> 24) & 0xFF; + for (j = 0, n = fileId.length; j < n; ++j) { + hashData[i++] = fileId[j]; + } + if (revision >= 4 && !encryptMetadata) { + hashData[i++] = 0xFF; + hashData[i++] = 0xFF; + hashData[i++] = 0xFF; + hashData[i++] = 0xFF; + } + var hash = calculateMD5(hashData, 0, i); + var keyLengthInBytes = keyLength >> 3; + if (revision >= 3) { + for (j = 0; j < 50; ++j) { + hash = calculateMD5(hash, 0, keyLengthInBytes); + } + } + var encryptionKey = hash.subarray(0, keyLengthInBytes); + var cipher, checkData; - if ((b = str.getByte()) === -1) { - error('Bad block header in flate stream'); + if (revision >= 3) { + for (i = 0; i < 32; ++i) { + hashData[i] = defaultPasswordBytes[i]; } - var blockLen = b; - if ((b = str.getByte()) === -1) { - error('Bad block header in flate stream'); + for (j = 0, n = fileId.length; j < n; ++j) { + hashData[i++] = fileId[j]; } - blockLen |= (b << 8); - if ((b = str.getByte()) === -1) { - error('Bad block header in flate stream'); + cipher = new ARCFourCipher(encryptionKey); + checkData = cipher.encryptBlock(calculateMD5(hashData, 0, i)); + n = encryptionKey.length; + var derivedKey = new Uint8Array(n), k; + for (j = 1; j <= 19; ++j) { + for (k = 0; k < n; ++k) { + derivedKey[k] = encryptionKey[k] ^ j; + } + cipher = new ARCFourCipher(derivedKey); + checkData = cipher.encryptBlock(checkData); } - var check = b; - if ((b = str.getByte()) === -1) { - error('Bad block header in flate stream'); + for (j = 0, n = checkData.length; j < n; ++j) { + if (userPassword[j] !== checkData[j]) { + return null; + } } - check |= (b << 8); - if (check !== (~blockLen & 0xffff) && - (blockLen !== 0 || check !== 0)) { - // Ignoring error for bad "empty" block (see issue 1277) - error('Bad uncompressed block length in flate stream'); + } else { + cipher = new ARCFourCipher(encryptionKey); + checkData = cipher.encryptBlock(defaultPasswordBytes); + for (j = 0, n = checkData.length; j < n; ++j) { + if (userPassword[j] !== checkData[j]) { + return null; + } } + } + return encryptionKey; + } - this.codeBuf = 0; - this.codeSize = 0; + function decodeUserPassword(password, ownerPassword, revision, keyLength) { + var hashData = new Uint8Array(32), i = 0, j, n; + n = Math.min(32, password.length); + for (; i < n; ++i) { + hashData[i] = password[i]; + } + j = 0; + while (i < 32) { + hashData[i++] = defaultPasswordBytes[j++]; + } + var hash = calculateMD5(hashData, 0, i); + var keyLengthInBytes = keyLength >> 3; + if (revision >= 3) { + for (j = 0; j < 50; ++j) { + hash = calculateMD5(hash, 0, hash.length); + } + } - var bufferLength = this.bufferLength; - buffer = this.ensureBuffer(bufferLength + blockLen); - var end = bufferLength + blockLen; - this.bufferLength = end; - if (blockLen === 0) { - if (str.peekByte() === -1) { - this.eof = true; + var cipher, userPassword; + if (revision >= 3) { + userPassword = ownerPassword; + var derivedKey = new Uint8Array(keyLengthInBytes), k; + for (j = 19; j >= 0; j--) { + for (k = 0; k < keyLengthInBytes; ++k) { + derivedKey[k] = hash[k] ^ j; } + cipher = new ARCFourCipher(derivedKey); + userPassword = cipher.encryptBlock(userPassword); + } + } else { + cipher = new ARCFourCipher(hash.subarray(0, keyLengthInBytes)); + userPassword = cipher.encryptBlock(ownerPassword); + } + return userPassword; + } + + var identityName = Name.get('Identity'); + + function CipherTransformFactory(dict, fileId, password) { + var filter = dict.get('Filter'); + if (!isName(filter) || filter.name !== 'Standard') { + error('unknown encryption method'); + } + this.dict = dict; + var algorithm = dict.get('V'); + if (!isInt(algorithm) || + (algorithm !== 1 && algorithm !== 2 && algorithm !== 4 && + algorithm !== 5)) { + error('unsupported encryption algorithm'); + } + this.algorithm = algorithm; + var keyLength = dict.get('Length'); + if (!keyLength) { + // Spec asks to rely on encryption dictionary's Length entry, however + // some PDFs don't have it. Trying to recover. + if (algorithm <= 3) { + // For 1 and 2 it's fixed to 40-bit, for 3 40-bit is a minimal value. + keyLength = 40; } else { - for (var n = bufferLength; n < end; ++n) { - if ((b = str.getByte()) === -1) { - this.eof = true; - break; + // Trying to find default handler -- it usually has Length. + var cfDict = dict.get('CF'); + var streamCryptoName = dict.get('StmF'); + if (isDict(cfDict) && isName(streamCryptoName)) { + var handlerDict = cfDict.get(streamCryptoName.name); + keyLength = (handlerDict && handlerDict.get('Length')) || 128; + if (keyLength < 40) { + // Sometimes it's incorrect value of bits, generators specify bytes. + keyLength <<= 3; } - buffer[n] = b; } } - return; + } + if (!isInt(keyLength) || + keyLength < 40 || (keyLength % 8) !== 0) { + error('invalid key length'); } - var litCodeTable; - var distCodeTable; - if (hdr === 1) { // compressed block, fixed codes - litCodeTable = fixedLitCodeTab; - distCodeTable = fixedDistCodeTab; - } else if (hdr === 2) { // compressed block, dynamic codes - var numLitCodes = this.getBits(5) + 257; - var numDistCodes = this.getBits(5) + 1; - var numCodeLenCodes = this.getBits(4) + 4; - - // build the code lengths code table - var codeLenCodeLengths = new Uint8Array(codeLenCodeMap.length); + // prepare keys + var ownerPassword = stringToBytes(dict.get('O')).subarray(0, 32); + var userPassword = stringToBytes(dict.get('U')).subarray(0, 32); + var flags = dict.get('P'); + var revision = dict.get('R'); + // meaningful when V is 4 or 5 + var encryptMetadata = ((algorithm === 4 || algorithm === 5) && + dict.get('EncryptMetadata') !== false); + this.encryptMetadata = encryptMetadata; - var i; - for (i = 0; i < numCodeLenCodes; ++i) { - codeLenCodeLengths[codeLenCodeMap[i]] = this.getBits(3); + var fileIdBytes = stringToBytes(fileId); + var passwordBytes; + if (password) { + if (revision === 6) { + try { + password = utf8StringToString(password); + } catch (ex) { + warn('CipherTransformFactory: ' + + 'Unable to convert UTF8 encoded password.'); + } } - var codeLenCodeTab = this.generateHuffmanTable(codeLenCodeLengths); + passwordBytes = stringToBytes(password); + } - // build the literal and distance code tables - len = 0; - i = 0; - var codes = numLitCodes + numDistCodes; - var codeLengths = new Uint8Array(codes); - var bitsLength, bitsOffset, what; - while (i < codes) { - var code = this.getCode(codeLenCodeTab); - if (code === 16) { - bitsLength = 2; bitsOffset = 3; what = len; - } else if (code === 17) { - bitsLength = 3; bitsOffset = 3; what = (len = 0); - } else if (code === 18) { - bitsLength = 7; bitsOffset = 11; what = (len = 0); - } else { - codeLengths[i++] = len = code; - continue; - } + var encryptionKey; + if (algorithm !== 5) { + encryptionKey = prepareKeyData(fileIdBytes, passwordBytes, + ownerPassword, userPassword, flags, + revision, keyLength, encryptMetadata); + } + else { + var ownerValidationSalt = stringToBytes(dict.get('O')).subarray(32, 40); + var ownerKeySalt = stringToBytes(dict.get('O')).subarray(40, 48); + var uBytes = stringToBytes(dict.get('U')).subarray(0, 48); + var userValidationSalt = stringToBytes(dict.get('U')).subarray(32, 40); + var userKeySalt = stringToBytes(dict.get('U')).subarray(40, 48); + var ownerEncryption = stringToBytes(dict.get('OE')); + var userEncryption = stringToBytes(dict.get('UE')); + var perms = stringToBytes(dict.get('Perms')); + encryptionKey = + createEncryptionKey20(revision, passwordBytes, + ownerPassword, ownerValidationSalt, + ownerKeySalt, uBytes, + userPassword, userValidationSalt, + userKeySalt, ownerEncryption, + userEncryption, perms); + } + if (!encryptionKey && !password) { + throw new PasswordException('No password given', + PasswordResponses.NEED_PASSWORD); + } else if (!encryptionKey && password) { + // Attempting use the password as an owner password + var decodedPassword = decodeUserPassword(passwordBytes, ownerPassword, + revision, keyLength); + encryptionKey = prepareKeyData(fileIdBytes, decodedPassword, + ownerPassword, userPassword, flags, + revision, keyLength, encryptMetadata); + } - var repeatLength = this.getBits(bitsLength) + bitsOffset; - while (repeatLength-- > 0) { - codeLengths[i++] = what; - } - } + if (!encryptionKey) { + throw new PasswordException('Incorrect Password', + PasswordResponses.INCORRECT_PASSWORD); + } - litCodeTable = - this.generateHuffmanTable(codeLengths.subarray(0, numLitCodes)); - distCodeTable = - this.generateHuffmanTable(codeLengths.subarray(numLitCodes, codes)); - } else { - error('Unknown block type in flate stream'); + this.encryptionKey = encryptionKey; + + if (algorithm >= 4) { + this.cf = dict.get('CF'); + this.stmf = dict.get('StmF') || identityName; + this.strf = dict.get('StrF') || identityName; + this.eff = dict.get('EFF') || this.stmf; } + } - buffer = this.buffer; - var limit = buffer ? buffer.length : 0; - var pos = this.bufferLength; - while (true) { - var code1 = this.getCode(litCodeTable); - if (code1 < 256) { - if (pos + 1 >= limit) { - buffer = this.ensureBuffer(pos + 1); - limit = buffer.length; - } - buffer[pos++] = code1; - continue; + function buildObjectKey(num, gen, encryptionKey, isAes) { + var key = new Uint8Array(encryptionKey.length + 9), i, n; + for (i = 0, n = encryptionKey.length; i < n; ++i) { + key[i] = encryptionKey[i]; + } + key[i++] = num & 0xFF; + key[i++] = (num >> 8) & 0xFF; + key[i++] = (num >> 16) & 0xFF; + key[i++] = gen & 0xFF; + key[i++] = (gen >> 8) & 0xFF; + if (isAes) { + key[i++] = 0x73; + key[i++] = 0x41; + key[i++] = 0x6C; + key[i++] = 0x54; + } + var hash = calculateMD5(key, 0, i); + return hash.subarray(0, Math.min(encryptionKey.length + 5, 16)); + } + + function buildCipherConstructor(cf, name, num, gen, key) { + var cryptFilter = cf.get(name.name); + var cfm; + if (cryptFilter !== null && cryptFilter !== undefined) { + cfm = cryptFilter.get('CFM'); + } + if (!cfm || cfm.name === 'None') { + return function cipherTransformFactoryBuildCipherConstructorNone() { + return new NullCipher(); + }; + } + if ('V2' === cfm.name) { + return function cipherTransformFactoryBuildCipherConstructorV2() { + return new ARCFourCipher(buildObjectKey(num, gen, key, false)); + }; + } + if ('AESV2' === cfm.name) { + return function cipherTransformFactoryBuildCipherConstructorAESV2() { + return new AES128Cipher(buildObjectKey(num, gen, key, true)); + }; + } + if ('AESV3' === cfm.name) { + return function cipherTransformFactoryBuildCipherConstructorAESV3() { + return new AES256Cipher(key); + }; + } + error('Unknown crypto method'); + } + + CipherTransformFactory.prototype = { + createCipherTransform: + function CipherTransformFactory_createCipherTransform(num, gen) { + if (this.algorithm === 4 || this.algorithm === 5) { + return new CipherTransform( + buildCipherConstructor(this.cf, this.stmf, + num, gen, this.encryptionKey), + buildCipherConstructor(this.cf, this.strf, + num, gen, this.encryptionKey)); } - if (code1 === 256) { - this.bufferLength = pos; - return; + // algorithms 1 and 2 + var key = buildObjectKey(num, gen, this.encryptionKey, false); + var cipherConstructor = function buildCipherCipherConstructor() { + return new ARCFourCipher(key); + }; + return new CipherTransform(cipherConstructor, cipherConstructor); + } + }; + + return CipherTransformFactory; +})(); + +exports.AES128Cipher = AES128Cipher; +exports.AES256Cipher = AES256Cipher; +exports.ARCFourCipher = ARCFourCipher; +exports.CipherTransformFactory = CipherTransformFactory; +exports.PDF17 = PDF17; +exports.PDF20 = PDF20; +exports.calculateMD5 = calculateMD5; +exports.calculateSHA256 = calculateSHA256; +exports.calculateSHA384 = calculateSHA384; +exports.calculateSHA512 = calculateSHA512; +})); + +(function (root, factory) { + { + factory((root.pdfjsCoreFontRenderer = {}), root.pdfjsSharedUtil, + root.pdfjsCoreStream, root.pdfjsCoreGlyphList); + } +}(this, function (exports, sharedUtil, coreStream, coreGlyphList) { + +var Util = sharedUtil.Util; +var bytesToString = sharedUtil.bytesToString; +var error = sharedUtil.error; +var Stream = coreStream.Stream; +var GlyphsUnicode = coreGlyphList.GlyphsUnicode; + +var coreFonts; // see _setCoreFonts below +var CFFParser; // = coreFonts.CFFParser; +var Encodings; // = coreFonts.Encodings; + +var FontRendererFactory = (function FontRendererFactoryClosure() { + function getLong(data, offset) { + return (data[offset] << 24) | (data[offset + 1] << 16) | + (data[offset + 2] << 8) | data[offset + 3]; + } + + function getUshort(data, offset) { + return (data[offset] << 8) | data[offset + 1]; + } + + function parseCmap(data, start, end) { + var offset = (getUshort(data, start + 2) === 1 ? + getLong(data, start + 8) : getLong(data, start + 16)); + var format = getUshort(data, start + offset); + var length, ranges, p, i; + if (format === 4) { + length = getUshort(data, start + offset + 2); + var segCount = getUshort(data, start + offset + 6) >> 1; + p = start + offset + 14; + ranges = []; + for (i = 0; i < segCount; i++, p += 2) { + ranges[i] = {end: getUshort(data, p)}; } - code1 -= 257; - code1 = lengthDecode[code1]; - var code2 = code1 >> 16; - if (code2 > 0) { - code2 = this.getBits(code2); + p += 2; + for (i = 0; i < segCount; i++, p += 2) { + ranges[i].start = getUshort(data, p); } - len = (code1 & 0xffff) + code2; - code1 = this.getCode(distCodeTable); - code1 = distDecode[code1]; - code2 = code1 >> 16; - if (code2 > 0) { - code2 = this.getBits(code2); + for (i = 0; i < segCount; i++, p += 2) { + ranges[i].idDelta = getUshort(data, p); } - var dist = (code1 & 0xffff) + code2; - if (pos + len >= limit) { - buffer = this.ensureBuffer(pos + len); - limit = buffer.length; + for (i = 0; i < segCount; i++, p += 2) { + var idOffset = getUshort(data, p); + if (idOffset === 0) { + continue; + } + ranges[i].ids = []; + for (var j = 0, jj = ranges[i].end - ranges[i].start + 1; j < jj; j++) { + ranges[i].ids[j] = getUshort(data, p + idOffset); + idOffset += 2; + } } - for (var k = 0; k < len; ++k, ++pos) { - buffer[pos] = buffer[pos - dist]; + return ranges; + } else if (format === 12) { + length = getLong(data, start + offset + 4); + var groups = getLong(data, start + offset + 12); + p = start + offset + 16; + ranges = []; + for (i = 0; i < groups; i++) { + ranges.push({ + start: getLong(data, p), + end: getLong(data, p + 4), + idDelta: getLong(data, p + 8) - getLong(data, p) + }); + p += 12; } + return ranges; } - }; - - return FlateStream; -})(); + error('not supported cmap: ' + format); + } -var PredictorStream = (function PredictorStreamClosure() { - function PredictorStream(str, maybeLength, params) { - var predictor = this.predictor = params.get('Predictor') || 1; + function parseCff(data, start, end) { + var properties = {}; + var parser = new CFFParser(new Stream(data, start, end - start), + properties); + var cff = parser.parse(); + return { + glyphs: cff.charStrings.objects, + subrs: (cff.topDict.privateDict && cff.topDict.privateDict.subrsIndex && + cff.topDict.privateDict.subrsIndex.objects), + gsubrs: cff.globalSubrIndex && cff.globalSubrIndex.objects + }; + } - if (predictor <= 1) { - return str; // no prediction + function parseGlyfTable(glyf, loca, isGlyphLocationsLong) { + var itemSize, itemDecode; + if (isGlyphLocationsLong) { + itemSize = 4; + itemDecode = function fontItemDecodeLong(data, offset) { + return (data[offset] << 24) | (data[offset + 1] << 16) | + (data[offset + 2] << 8) | data[offset + 3]; + }; + } else { + itemSize = 2; + itemDecode = function fontItemDecode(data, offset) { + return (data[offset] << 9) | (data[offset + 1] << 1); + }; } - if (predictor !== 2 && (predictor < 10 || predictor > 15)) { - error('Unsupported predictor: ' + predictor); + var glyphs = []; + var startOffset = itemDecode(loca, 0); + for (var j = itemSize; j < loca.length; j += itemSize) { + var endOffset = itemDecode(loca, j); + glyphs.push(glyf.subarray(startOffset, endOffset)); + startOffset = endOffset; } + return glyphs; + } - if (predictor === 2) { - this.readBlock = this.readBlockTiff; - } else { - this.readBlock = this.readBlockPng; + function lookupCmap(ranges, unicode) { + var code = unicode.charCodeAt(0); + var l = 0, r = ranges.length - 1; + while (l < r) { + var c = (l + r + 1) >> 1; + if (code < ranges[c].start) { + r = c - 1; + } else { + l = c; + } } - - this.str = str; - this.dict = str.dict; - - var colors = this.colors = params.get('Colors') || 1; - var bits = this.bits = params.get('BitsPerComponent') || 8; - var columns = this.columns = params.get('Columns') || 1; - - this.pixBytes = (colors * bits + 7) >> 3; - this.rowBytes = (columns * colors * bits + 7) >> 3; - - DecodeStream.call(this, maybeLength); - return this; + if (ranges[l].start <= code && code <= ranges[l].end) { + return (ranges[l].idDelta + (ranges[l].ids ? + ranges[l].ids[code - ranges[l].start] : code)) & 0xFFFF; + } + return 0; } - PredictorStream.prototype = Object.create(DecodeStream.prototype); - - PredictorStream.prototype.readBlockTiff = - function predictorStreamReadBlockTiff() { - var rowBytes = this.rowBytes; - - var bufferLength = this.bufferLength; - var buffer = this.ensureBuffer(bufferLength + rowBytes); - - var bits = this.bits; - var colors = this.colors; - - var rawBytes = this.str.getBytes(rowBytes); - this.eof = !rawBytes.length; - if (this.eof) { - return; + function compileGlyf(code, cmds, font) { + function moveTo(x, y) { + cmds.push({cmd: 'moveTo', args: [x, y]}); + } + function lineTo(x, y) { + cmds.push({cmd: 'lineTo', args: [x, y]}); + } + function quadraticCurveTo(xa, ya, x, y) { + cmds.push({cmd: 'quadraticCurveTo', args: [xa, ya, x, y]}); } - var inbuf = 0, outbuf = 0; - var inbits = 0, outbits = 0; - var pos = bufferLength; - var i; - - if (bits === 1) { - for (i = 0; i < rowBytes; ++i) { - var c = rawBytes[i]; - inbuf = (inbuf << 8) | c; - // bitwise addition is exclusive or - // first shift inbuf and then add - buffer[pos++] = (c ^ (inbuf >> colors)) & 0xFF; - // truncate inbuf (assumes colors < 16) - inbuf &= 0xFFFF; + var i = 0; + var numberOfContours = ((code[i] << 24) | (code[i + 1] << 16)) >> 16; + var flags; + var x = 0, y = 0; + i += 10; + if (numberOfContours < 0) { + // composite glyph + do { + flags = (code[i] << 8) | code[i + 1]; + var glyphIndex = (code[i + 2] << 8) | code[i + 3]; + i += 4; + var arg1, arg2; + if ((flags & 0x01)) { + arg1 = ((code[i] << 24) | (code[i + 1] << 16)) >> 16; + arg2 = ((code[i + 2] << 24) | (code[i + 3] << 16)) >> 16; + i += 4; + } else { + arg1 = code[i++]; arg2 = code[i++]; + } + if ((flags & 0x02)) { + x = arg1; + y = arg2; + } else { + x = 0; y = 0; // TODO "they are points" ? + } + var scaleX = 1, scaleY = 1, scale01 = 0, scale10 = 0; + if ((flags & 0x08)) { + scaleX = + scaleY = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; + i += 2; + } else if ((flags & 0x40)) { + scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; + scaleY = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824; + i += 4; + } else if ((flags & 0x80)) { + scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; + scale01 = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824; + scale10 = ((code[i + 4] << 24) | (code[i + 5] << 16)) / 1073741824; + scaleY = ((code[i + 6] << 24) | (code[i + 7] << 16)) / 1073741824; + i += 8; + } + var subglyph = font.glyphs[glyphIndex]; + if (subglyph) { + cmds.push({cmd: 'save'}); + cmds.push({cmd: 'transform', + args: [scaleX, scale01, scale10, scaleY, x, y]}); + compileGlyf(subglyph, cmds, font); + cmds.push({cmd: 'restore'}); + } + } while ((flags & 0x20)); + } else { + // simple glyph + var endPtsOfContours = []; + var j, jj; + for (j = 0; j < numberOfContours; j++) { + endPtsOfContours.push((code[i] << 8) | code[i + 1]); + i += 2; } - } else if (bits === 8) { - for (i = 0; i < colors; ++i) { - buffer[pos++] = rawBytes[i]; + var instructionLength = (code[i] << 8) | code[i + 1]; + i += 2 + instructionLength; // skipping the instructions + var numberOfPoints = endPtsOfContours[endPtsOfContours.length - 1] + 1; + var points = []; + while (points.length < numberOfPoints) { + flags = code[i++]; + var repeat = 1; + if ((flags & 0x08)) { + repeat += code[i++]; + } + while (repeat-- > 0) { + points.push({flags: flags}); + } } - for (; i < rowBytes; ++i) { - buffer[pos] = buffer[pos - colors] + rawBytes[i]; - pos++; + for (j = 0; j < numberOfPoints; j++) { + switch (points[j].flags & 0x12) { + case 0x00: + x += ((code[i] << 24) | (code[i + 1] << 16)) >> 16; + i += 2; + break; + case 0x02: + x -= code[i++]; + break; + case 0x12: + x += code[i++]; + break; + } + points[j].x = x; } - } else { - var compArray = new Uint8Array(colors + 1); - var bitMask = (1 << bits) - 1; - var j = 0, k = bufferLength; - var columns = this.columns; - for (i = 0; i < columns; ++i) { - for (var kk = 0; kk < colors; ++kk) { - if (inbits < bits) { - inbuf = (inbuf << 8) | (rawBytes[j++] & 0xFF); - inbits += 8; - } - compArray[kk] = (compArray[kk] + - (inbuf >> (inbits - bits))) & bitMask; - inbits -= bits; - outbuf = (outbuf << bits) | compArray[kk]; - outbits += bits; - if (outbits >= 8) { - buffer[k++] = (outbuf >> (outbits - 8)) & 0xFF; - outbits -= 8; - } + for (j = 0; j < numberOfPoints; j++) { + switch (points[j].flags & 0x24) { + case 0x00: + y += ((code[i] << 24) | (code[i + 1] << 16)) >> 16; + i += 2; + break; + case 0x04: + y -= code[i++]; + break; + case 0x24: + y += code[i++]; + break; } + points[j].y = y; } - if (outbits > 0) { - buffer[k++] = (outbuf << (8 - outbits)) + - (inbuf & ((1 << (8 - outbits)) - 1)); + + var startPoint = 0; + for (i = 0; i < numberOfContours; i++) { + var endPoint = endPtsOfContours[i]; + // contours might have implicit points, which is located in the middle + // between two neighboring off-curve points + var contour = points.slice(startPoint, endPoint + 1); + if ((contour[0].flags & 1)) { + contour.push(contour[0]); // using start point at the contour end + } else if ((contour[contour.length - 1].flags & 1)) { + // first is off-curve point, trying to use one from the end + contour.unshift(contour[contour.length - 1]); + } else { + // start and end are off-curve points, creating implicit one + var p = { + flags: 1, + x: (contour[0].x + contour[contour.length - 1].x) / 2, + y: (contour[0].y + contour[contour.length - 1].y) / 2 + }; + contour.unshift(p); + contour.push(p); + } + moveTo(contour[0].x, contour[0].y); + for (j = 1, jj = contour.length; j < jj; j++) { + if ((contour[j].flags & 1)) { + lineTo(contour[j].x, contour[j].y); + } else if ((contour[j + 1].flags & 1)){ + quadraticCurveTo(contour[j].x, contour[j].y, + contour[j + 1].x, contour[j + 1].y); + j++; + } else { + quadraticCurveTo(contour[j].x, contour[j].y, + (contour[j].x + contour[j + 1].x) / 2, + (contour[j].y + contour[j + 1].y) / 2); + } + } + startPoint = endPoint + 1; } } - this.bufferLength += rowBytes; - }; - - PredictorStream.prototype.readBlockPng = - function predictorStreamReadBlockPng() { + } - var rowBytes = this.rowBytes; - var pixBytes = this.pixBytes; + function compileCharString(code, cmds, font) { + var stack = []; + var x = 0, y = 0; + var stems = 0; - var predictor = this.str.getByte(); - var rawBytes = this.str.getBytes(rowBytes); - this.eof = !rawBytes.length; - if (this.eof) { - return; + function moveTo(x, y) { + cmds.push({cmd: 'moveTo', args: [x, y]}); } - - var bufferLength = this.bufferLength; - var buffer = this.ensureBuffer(bufferLength + rowBytes); - - var prevRow = buffer.subarray(bufferLength - rowBytes, bufferLength); - if (prevRow.length === 0) { - prevRow = new Uint8Array(rowBytes); + function lineTo(x, y) { + cmds.push({cmd: 'lineTo', args: [x, y]}); + } + function bezierCurveTo(x1, y1, x2, y2, x, y) { + cmds.push({cmd: 'bezierCurveTo', args: [x1, y1, x2, y2, x, y]}); } - var i, j = bufferLength, up, c; - switch (predictor) { - case 0: - for (i = 0; i < rowBytes; ++i) { - buffer[j++] = rawBytes[i]; - } - break; - case 1: - for (i = 0; i < pixBytes; ++i) { - buffer[j++] = rawBytes[i]; - } - for (; i < rowBytes; ++i) { - buffer[j] = (buffer[j - pixBytes] + rawBytes[i]) & 0xFF; - j++; - } - break; - case 2: - for (i = 0; i < rowBytes; ++i) { - buffer[j++] = (prevRow[i] + rawBytes[i]) & 0xFF; - } - break; - case 3: - for (i = 0; i < pixBytes; ++i) { - buffer[j++] = (prevRow[i] >> 1) + rawBytes[i]; - } - for (; i < rowBytes; ++i) { - buffer[j] = (((prevRow[i] + buffer[j - pixBytes]) >> 1) + - rawBytes[i]) & 0xFF; - j++; - } - break; - case 4: - // we need to save the up left pixels values. the simplest way - // is to create a new buffer - for (i = 0; i < pixBytes; ++i) { - up = prevRow[i]; - c = rawBytes[i]; - buffer[j++] = up + c; - } - for (; i < rowBytes; ++i) { - up = prevRow[i]; - var upLeft = prevRow[i - pixBytes]; - var left = buffer[j - pixBytes]; - var p = left + up - upLeft; + function parse(code) { + var i = 0; + while (i < code.length) { + var stackClean = false; + var v = code[i++]; + var xa, xb, ya, yb, y1, y2, y3, n, subrCode; + switch (v) { + case 1: // hstem + stems += stack.length >> 1; + stackClean = true; + break; + case 3: // vstem + stems += stack.length >> 1; + stackClean = true; + break; + case 4: // vmoveto + y += stack.pop(); + moveTo(x, y); + stackClean = true; + break; + case 5: // rlineto + while (stack.length > 0) { + x += stack.shift(); + y += stack.shift(); + lineTo(x, y); + } + break; + case 6: // hlineto + while (stack.length > 0) { + x += stack.shift(); + lineTo(x, y); + if (stack.length === 0) { + break; + } + y += stack.shift(); + lineTo(x, y); + } + break; + case 7: // vlineto + while (stack.length > 0) { + y += stack.shift(); + lineTo(x, y); + if (stack.length === 0) { + break; + } + x += stack.shift(); + lineTo(x, y); + } + break; + case 8: // rrcurveto + while (stack.length > 0) { + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + } + break; + case 10: // callsubr + n = stack.pop() + font.subrsBias; + subrCode = font.subrs[n]; + if (subrCode) { + parse(subrCode); + } + break; + case 11: // return + return; + case 12: + v = code[i++]; + switch (v) { + case 34: // flex + xa = x + stack.shift(); + xb = xa + stack.shift(); y1 = y + stack.shift(); + x = xb + stack.shift(); + bezierCurveTo(xa, y, xb, y1, x, y1); + xa = x + stack.shift(); + xb = xa + stack.shift(); + x = xb + stack.shift(); + bezierCurveTo(xa, y1, xb, y, x, y); + break; + case 35: // flex + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + stack.pop(); // fd + break; + case 36: // hflex1 + xa = x + stack.shift(); y1 = y + stack.shift(); + xb = xa + stack.shift(); y2 = y1 + stack.shift(); + x = xb + stack.shift(); + bezierCurveTo(xa, y1, xb, y2, x, y2); + xa = x + stack.shift(); + xb = xa + stack.shift(); y3 = y2 + stack.shift(); + x = xb + stack.shift(); + bezierCurveTo(xa, y2, xb, y3, x, y); + break; + case 37: // flex1 + var x0 = x, y0 = y; + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb; y = yb; + if (Math.abs(x - x0) > Math.abs(y - y0)) { + x += stack.shift(); + } else { + y += stack.shift(); + } + bezierCurveTo(xa, ya, xb, yb, x, y); + break; + default: + error('unknown operator: 12 ' + v); + } + break; + case 14: // endchar + if (stack.length >= 4) { + var achar = stack.pop(); + var bchar = stack.pop(); + y = stack.pop(); + x = stack.pop(); + cmds.push({cmd: 'save'}); + cmds.push({cmd: 'translate', args: [x, y]}); + var gid = lookupCmap(font.cmap, String.fromCharCode( + font.glyphNameMap[Encodings.StandardEncoding[achar]])); + compileCharString(font.glyphs[gid], cmds, font); + cmds.push({cmd: 'restore'}); + + gid = lookupCmap(font.cmap, String.fromCharCode( + font.glyphNameMap[Encodings.StandardEncoding[bchar]])); + compileCharString(font.glyphs[gid], cmds, font); + } + return; + case 18: // hstemhm + stems += stack.length >> 1; + stackClean = true; + break; + case 19: // hintmask + stems += stack.length >> 1; + i += (stems + 7) >> 3; + stackClean = true; + break; + case 20: // cntrmask + stems += stack.length >> 1; + i += (stems + 7) >> 3; + stackClean = true; + break; + case 21: // rmoveto + y += stack.pop(); + x += stack.pop(); + moveTo(x, y); + stackClean = true; + break; + case 22: // hmoveto + x += stack.pop(); + moveTo(x, y); + stackClean = true; + break; + case 23: // vstemhm + stems += stack.length >> 1; + stackClean = true; + break; + case 24: // rcurveline + while (stack.length > 2) { + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + } + x += stack.shift(); + y += stack.shift(); + lineTo(x, y); + break; + case 25: // rlinecurve + while (stack.length > 6) { + x += stack.shift(); + y += stack.shift(); + lineTo(x, y); + } + xa = x + stack.shift(); ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + break; + case 26: // vvcurveto + if (stack.length % 2) { + x += stack.shift(); + } + while (stack.length > 0) { + xa = x; ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb; y = yb + stack.shift(); + bezierCurveTo(xa, ya, xb, yb, x, y); + } + break; + case 27: // hhcurveto + if (stack.length % 2) { + y += stack.shift(); + } + while (stack.length > 0) { + xa = x + stack.shift(); ya = y; + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); y = yb; + bezierCurveTo(xa, ya, xb, yb, x, y); + } + break; + case 28: + stack.push(((code[i] << 24) | (code[i + 1] << 16)) >> 16); + i += 2; + break; + case 29: // callgsubr + n = stack.pop() + font.gsubrsBias; + subrCode = font.gsubrs[n]; + if (subrCode) { + parse(subrCode); + } + break; + case 30: // vhcurveto + while (stack.length > 0) { + xa = x; ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); + y = yb + (stack.length === 1 ? stack.shift() : 0); + bezierCurveTo(xa, ya, xb, yb, x, y); + if (stack.length === 0) { + break; + } - var pa = p - left; - if (pa < 0) { - pa = -pa; - } - var pb = p - up; - if (pb < 0) { - pb = -pb; - } - var pc = p - upLeft; - if (pc < 0) { - pc = -pc; - } + xa = x + stack.shift(); ya = y; + xb = xa + stack.shift(); yb = ya + stack.shift(); + y = yb + stack.shift(); + x = xb + (stack.length === 1 ? stack.shift() : 0); + bezierCurveTo(xa, ya, xb, yb, x, y); + } + break; + case 31: // hvcurveto + while (stack.length > 0) { + xa = x + stack.shift(); ya = y; + xb = xa + stack.shift(); yb = ya + stack.shift(); + y = yb + stack.shift(); + x = xb + (stack.length === 1 ? stack.shift() : 0); + bezierCurveTo(xa, ya, xb, yb, x, y); + if (stack.length === 0) { + break; + } - c = rawBytes[i]; - if (pa <= pb && pa <= pc) { - buffer[j++] = left + c; - } else if (pb <= pc) { - buffer[j++] = up + c; - } else { - buffer[j++] = upLeft + c; - } + xa = x; ya = y + stack.shift(); + xb = xa + stack.shift(); yb = ya + stack.shift(); + x = xb + stack.shift(); + y = yb + (stack.length === 1 ? stack.shift() : 0); + bezierCurveTo(xa, ya, xb, yb, x, y); + } + break; + default: + if (v < 32) { + error('unknown operator: ' + v); + } + if (v < 247) { + stack.push(v - 139); + } else if (v < 251) { + stack.push((v - 247) * 256 + code[i++] + 108); + } else if (v < 255) { + stack.push(-(v - 251) * 256 - code[i++] - 108); + } else { + stack.push(((code[i] << 24) | (code[i + 1] << 16) | + (code[i + 2] << 8) | code[i + 3]) / 65536); + i += 4; + } + break; + } + if (stackClean) { + stack.length = 0; } - break; - default: - error('Unsupported predictor: ' + predictor); - } - this.bufferLength += rowBytes; - }; - - return PredictorStream; -})(); - -/** - * Depending on the type of JPEG a JpegStream is handled in different ways. For - * JPEG's that are supported natively such as DeviceGray and DeviceRGB the image - * data is stored and then loaded by the browser. For unsupported JPEG's we use - * a library to decode these images and the stream behaves like all the other - * DecodeStreams. - */ -var JpegStream = (function JpegStreamClosure() { - function JpegStream(stream, maybeLength, dict, xref) { - // Some images may contain 'junk' before the SOI (start-of-image) marker. - // Note: this seems to mainly affect inline images. - var ch; - while ((ch = stream.getByte()) !== -1) { - if (ch === 0xFF) { // Find the first byte of the SOI marker (0xFFD8). - stream.skip(-1); // Reset the stream position to the SOI. - break; } } - this.stream = stream; - this.maybeLength = maybeLength; - this.dict = dict; - - DecodeStream.call(this, maybeLength); + parse(code); } - JpegStream.prototype = Object.create(DecodeStream.prototype); + var noop = ''; - Object.defineProperty(JpegStream.prototype, 'bytes', { - get: function JpegStream_bytes() { - // If this.maybeLength is null, we'll get the entire stream. - return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); + function CompiledFont(fontMatrix) { + this.compiledGlyphs = {}; + this.fontMatrix = fontMatrix; + } + CompiledFont.prototype = { + getPathJs: function (unicode) { + var gid = lookupCmap(this.cmap, unicode); + var fn = this.compiledGlyphs[gid]; + if (!fn) { + this.compiledGlyphs[gid] = fn = this.compileGlyph(this.glyphs[gid]); + } + return fn; }, - configurable: true - }); - - JpegStream.prototype.ensureBuffer = function JpegStream_ensureBuffer(req) { - if (this.bufferLength) { - return; - } - try { - var jpegImage = new JpegImage(); - // checking if values needs to be transformed before conversion - if (this.forceRGB && this.dict && isArray(this.dict.get('Decode'))) { - var decodeArr = this.dict.get('Decode'); - var bitsPerComponent = this.dict.get('BitsPerComponent') || 8; - var decodeArrLength = decodeArr.length; - var transform = new Int32Array(decodeArrLength); - var transformNeeded = false; - var maxValue = (1 << bitsPerComponent) - 1; - for (var i = 0; i < decodeArrLength; i += 2) { - transform[i] = ((decodeArr[i + 1] - decodeArr[i]) * 256) | 0; - transform[i + 1] = (decodeArr[i] * maxValue) | 0; - if (transform[i] !== 256 || transform[i + 1] !== 0) { - transformNeeded = true; - } - } - if (transformNeeded) { - jpegImage.decodeTransform = transform; - } + compileGlyph: function (code) { + if (!code || code.length === 0 || code[0] === 14) { + return noop; } - jpegImage.parse(this.bytes); - var data = jpegImage.getData(this.drawWidth, this.drawHeight, - this.forceRGB); - this.buffer = data; - this.bufferLength = data.length; - this.eof = true; - } catch (e) { - error('JPEG error: ' + e); - } - }; - - JpegStream.prototype.getBytes = function JpegStream_getBytes(length) { - this.ensureBuffer(); - return this.buffer; - }; - - JpegStream.prototype.getIR = function JpegStream_getIR() { - return PDFJS.createObjectURL(this.bytes, 'image/jpeg'); - }; - /** - * Checks if the image can be decoded and displayed by the browser without any - * further processing such as color space conversions. - */ - JpegStream.prototype.isNativelySupported = - function JpegStream_isNativelySupported(xref, res) { - var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res); - return (cs.name === 'DeviceGray' || cs.name === 'DeviceRGB') && - cs.isDefaultDecode(this.dict.get('Decode', 'D')); - }; - /** - * Checks if the image can be decoded by the browser. - */ - JpegStream.prototype.isNativelyDecodable = - function JpegStream_isNativelyDecodable(xref, res) { - var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res); - return (cs.numComps === 1 || cs.numComps === 3) && - cs.isDefaultDecode(this.dict.get('Decode', 'D')); - }; - - return JpegStream; -})(); + var cmds = []; + cmds.push({cmd: 'save'}); + cmds.push({cmd: 'transform', args: this.fontMatrix.slice()}); + cmds.push({cmd: 'scale', args: ['size', '-size']}); -/** - * For JPEG 2000's we use a library to decode these images and - * the stream behaves like all the other DecodeStreams. - */ -var JpxStream = (function JpxStreamClosure() { - function JpxStream(stream, maybeLength, dict) { - this.stream = stream; - this.maybeLength = maybeLength; - this.dict = dict; + this.compileGlyphImpl(code, cmds); - DecodeStream.call(this, maybeLength); - } + cmds.push({cmd: 'restore'}); - JpxStream.prototype = Object.create(DecodeStream.prototype); + return cmds; + }, - Object.defineProperty(JpxStream.prototype, 'bytes', { - get: function JpxStream_bytes() { - // If this.maybeLength is null, we'll get the entire stream. - return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); + compileGlyphImpl: function () { + error('Children classes should implement this.'); }, - configurable: true - }); - JpxStream.prototype.ensureBuffer = function JpxStream_ensureBuffer(req) { - if (this.bufferLength) { - return; + hasBuiltPath: function (unicode) { + var gid = lookupCmap(this.cmap, unicode); + return gid in this.compiledGlyphs; } + }; - var jpxImage = new JpxImage(); - jpxImage.parse(this.bytes); - - var width = jpxImage.width; - var height = jpxImage.height; - var componentsCount = jpxImage.componentsCount; - var tileCount = jpxImage.tiles.length; - if (tileCount === 1) { - this.buffer = jpxImage.tiles[0].items; - } else { - var data = new Uint8Array(width * height * componentsCount); + function TrueTypeCompiled(glyphs, cmap, fontMatrix) { + fontMatrix = fontMatrix || [0.000488, 0, 0, 0.000488, 0, 0]; + CompiledFont.call(this, fontMatrix); - for (var k = 0; k < tileCount; k++) { - var tileComponents = jpxImage.tiles[k]; - var tileWidth = tileComponents.width; - var tileHeight = tileComponents.height; - var tileLeft = tileComponents.left; - var tileTop = tileComponents.top; + this.glyphs = glyphs; + this.cmap = cmap; - var src = tileComponents.items; - var srcPosition = 0; - var dataPosition = (width * tileTop + tileLeft) * componentsCount; - var imgRowSize = width * componentsCount; - var tileRowSize = tileWidth * componentsCount; + this.compiledGlyphs = []; + } - for (var j = 0; j < tileHeight; j++) { - var rowBytes = src.subarray(srcPosition, srcPosition + tileRowSize); - data.set(rowBytes, dataPosition); - srcPosition += tileRowSize; - dataPosition += imgRowSize; - } - } - this.buffer = data; + Util.inherit(TrueTypeCompiled, CompiledFont, { + compileGlyphImpl: function (code, cmds) { + compileGlyf(code, cmds, this); } - this.bufferLength = this.buffer.length; - this.eof = true; - }; - - return JpxStream; -})(); + }); -/** - * For JBIG2's we use a library to decode these images and - * the stream behaves like all the other DecodeStreams. - */ -var Jbig2Stream = (function Jbig2StreamClosure() { - function Jbig2Stream(stream, maybeLength, dict) { - this.stream = stream; - this.maybeLength = maybeLength; - this.dict = dict; + function Type2Compiled(cffInfo, cmap, fontMatrix, glyphNameMap) { + fontMatrix = fontMatrix || [0.001, 0, 0, 0.001, 0, 0]; + CompiledFont.call(this, fontMatrix); + this.glyphs = cffInfo.glyphs; + this.gsubrs = cffInfo.gsubrs || []; + this.subrs = cffInfo.subrs || []; + this.cmap = cmap; + this.glyphNameMap = glyphNameMap || GlyphsUnicode; - DecodeStream.call(this, maybeLength); + this.compiledGlyphs = []; + this.gsubrsBias = (this.gsubrs.length < 1240 ? + 107 : (this.gsubrs.length < 33900 ? 1131 : 32768)); + this.subrsBias = (this.subrs.length < 1240 ? + 107 : (this.subrs.length < 33900 ? 1131 : 32768)); } - Jbig2Stream.prototype = Object.create(DecodeStream.prototype); - - Object.defineProperty(Jbig2Stream.prototype, 'bytes', { - get: function Jbig2Stream_bytes() { - // If this.maybeLength is null, we'll get the entire stream. - return shadow(this, 'bytes', this.stream.getBytes(this.maybeLength)); - }, - configurable: true - }); - - Jbig2Stream.prototype.ensureBuffer = function Jbig2Stream_ensureBuffer(req) { - if (this.bufferLength) { - return; + Util.inherit(Type2Compiled, CompiledFont, { + compileGlyphImpl: function (code, cmds) { + compileCharString(code, cmds, this); } + }); - var jbig2Image = new Jbig2Image(); - - var chunks = [], xref = this.dict.xref; - var decodeParams = xref.fetchIfRef(this.dict.get('DecodeParms')); - // According to the PDF specification, DecodeParms can be either - // a dictionary, or an array whose elements are dictionaries. - if (isArray(decodeParams)) { - if (decodeParams.length > 1) { - warn('JBIG2 - \'DecodeParms\' array with multiple elements ' + - 'not supported.'); + return { + create: function FontRendererFactory_create(font) { + var data = new Uint8Array(font.data); + var cmap, glyf, loca, cff, indexToLocFormat, unitsPerEm; + var numTables = getUshort(data, 4); + for (var i = 0, p = 12; i < numTables; i++, p += 16) { + var tag = bytesToString(data.subarray(p, p + 4)); + var offset = getLong(data, p + 8); + var length = getLong(data, p + 12); + switch (tag) { + case 'cmap': + cmap = parseCmap(data, offset, offset + length); + break; + case 'glyf': + glyf = data.subarray(offset, offset + length); + break; + case 'loca': + loca = data.subarray(offset, offset + length); + break; + case 'head': + unitsPerEm = getUshort(data, offset + 18); + indexToLocFormat = getUshort(data, offset + 50); + break; + case 'CFF ': + cff = parseCff(data, offset, offset + length); + break; + } } - decodeParams = xref.fetchIfRef(decodeParams[0]); - } - if (decodeParams && decodeParams.has('JBIG2Globals')) { - var globalsStream = decodeParams.get('JBIG2Globals'); - var globals = globalsStream.getBytes(); - chunks.push({data: globals, start: 0, end: globals.length}); - } - chunks.push({data: this.bytes, start: 0, end: this.bytes.length}); - var data = jbig2Image.parseChunks(chunks); - var dataLength = data.length; - // JBIG2 had black as 1 and white as 0, inverting the colors - for (var i = 0; i < dataLength; i++) { - data[i] ^= 0xFF; + if (glyf) { + var fontMatrix = (!unitsPerEm ? font.fontMatrix : + [1 / unitsPerEm, 0, 0, 1 / unitsPerEm, 0, 0]); + return new TrueTypeCompiled( + parseGlyfTable(glyf, loca, indexToLocFormat), cmap, fontMatrix); + } else { + return new Type2Compiled(cff, cmap, font.fontMatrix, font.glyphNameMap); + } } - - this.buffer = data; - this.bufferLength = dataLength; - this.eof = true; }; - - return Jbig2Stream; })(); -var DecryptStream = (function DecryptStreamClosure() { - function DecryptStream(str, maybeLength, decrypt) { - this.str = str; - this.dict = str.dict; - this.decrypt = decrypt; - this.nextChunk = null; - this.initialized = false; - - DecodeStream.call(this, maybeLength); - } - - var chunkSize = 512; - - DecryptStream.prototype = Object.create(DecodeStream.prototype); - - DecryptStream.prototype.readBlock = function DecryptStream_readBlock() { - var chunk; - if (this.initialized) { - chunk = this.nextChunk; - } else { - chunk = this.str.getBytes(chunkSize); - this.initialized = true; - } - if (!chunk || chunk.length === 0) { - this.eof = true; - return; - } - this.nextChunk = this.str.getBytes(chunkSize); - var hasMoreData = this.nextChunk && this.nextChunk.length > 0; - - var decrypt = this.decrypt; - chunk = decrypt(chunk, !hasMoreData); - var bufferLength = this.bufferLength; - var i, n = chunk.length; - var buffer = this.ensureBuffer(bufferLength + n); - for (i = 0; i < n; i++) { - buffer[bufferLength++] = chunk[i]; - } - this.bufferLength = bufferLength; - }; +// TODO refactor to remove cyclic dependency on fonts.js +function _setCoreFonts(coreFonts_) { + coreFonts = coreFonts_; + Encodings = coreFonts_.Encodings; + CFFParser = coreFonts_.CFFParser; +} +exports._setCoreFonts = _setCoreFonts; - return DecryptStream; -})(); +exports.FontRendererFactory = FontRendererFactory; +})); -var Ascii85Stream = (function Ascii85StreamClosure() { - function Ascii85Stream(str, maybeLength) { - this.str = str; - this.dict = str.dict; - this.input = new Uint8Array(5); - // Most streams increase in size when decoded, but Ascii85 streams - // typically shrink by ~20%. - if (maybeLength) { - maybeLength = 0.8 * maybeLength; - } - DecodeStream.call(this, maybeLength); +(function (root, factory) { + { + factory((root.pdfjsCoreParser = {}), root.pdfjsSharedUtil, + root.pdfjsCorePrimitives, root.pdfjsCoreStream); } +}(this, function (exports, sharedUtil, corePrimitives, coreStream) { - Ascii85Stream.prototype = Object.create(DecodeStream.prototype); - - Ascii85Stream.prototype.readBlock = function Ascii85Stream_readBlock() { - var TILDA_CHAR = 0x7E; // '~' - var Z_LOWER_CHAR = 0x7A; // 'z' - var EOF = -1; +var MissingDataException = sharedUtil.MissingDataException; +var StreamType = sharedUtil.StreamType; +var assert = sharedUtil.assert; +var error = sharedUtil.error; +var info = sharedUtil.info; +var isArray = sharedUtil.isArray; +var isInt = sharedUtil.isInt; +var isNum = sharedUtil.isNum; +var isString = sharedUtil.isString; +var warn = sharedUtil.warn; +var Cmd = corePrimitives.Cmd; +var Dict = corePrimitives.Dict; +var Name = corePrimitives.Name; +var Ref = corePrimitives.Ref; +var isCmd = corePrimitives.isCmd; +var isDict = corePrimitives.isDict; +var isName = corePrimitives.isName; +var Ascii85Stream = coreStream.Ascii85Stream; +var AsciiHexStream = coreStream.AsciiHexStream; +var CCITTFaxStream = coreStream.CCITTFaxStream; +var FlateStream = coreStream.FlateStream; +var Jbig2Stream = coreStream.Jbig2Stream; +var JpegStream = coreStream.JpegStream; +var JpxStream = coreStream.JpxStream; +var LZWStream = coreStream.LZWStream; +var NullStream = coreStream.NullStream; +var PredictorStream = coreStream.PredictorStream; +var RunLengthStream = coreStream.RunLengthStream; - var str = this.str; +var EOF = {}; - var c = str.getByte(); - while (Lexer.isSpace(c)) { - c = str.getByte(); - } +function isEOF(v) { + return (v === EOF); +} - if (c === EOF || c === TILDA_CHAR) { - this.eof = true; - return; - } +var MAX_LENGTH_TO_CACHE = 1000; - var bufferLength = this.bufferLength, buffer; - var i; +var Parser = (function ParserClosure() { + function Parser(lexer, allowStreams, xref) { + this.lexer = lexer; + this.allowStreams = allowStreams; + this.xref = xref; + this.imageCache = {}; + this.refill(); + } - // special code for z - if (c === Z_LOWER_CHAR) { - buffer = this.ensureBuffer(bufferLength + 4); - for (i = 0; i < 4; ++i) { - buffer[bufferLength + i] = 0; + Parser.prototype = { + refill: function Parser_refill() { + this.buf1 = this.lexer.getObj(); + this.buf2 = this.lexer.getObj(); + }, + shift: function Parser_shift() { + if (isCmd(this.buf2, 'ID')) { + this.buf1 = this.buf2; + this.buf2 = null; + } else { + this.buf1 = this.buf2; + this.buf2 = this.lexer.getObj(); } - this.bufferLength += 4; - } else { - var input = this.input; - input[0] = c; - for (i = 1; i < 5; ++i) { - c = str.getByte(); - while (Lexer.isSpace(c)) { - c = str.getByte(); + }, + tryShift: function Parser_tryShift() { + try { + this.shift(); + return true; + } catch (e) { + if (e instanceof MissingDataException) { + throw e; } + // Upon failure, the caller should reset this.lexer.pos to a known good + // state and call this.shift() twice to reset the buffers. + return false; + } + }, + getObj: function Parser_getObj(cipherTransform) { + var buf1 = this.buf1; + this.shift(); - input[i] = c; + if (buf1 instanceof Cmd) { + switch (buf1.cmd) { + case 'BI': // inline image + return this.makeInlineImage(cipherTransform); + case '[': // array + var array = []; + while (!isCmd(this.buf1, ']') && !isEOF(this.buf1)) { + array.push(this.getObj(cipherTransform)); + } + if (isEOF(this.buf1)) { + error('End of file inside array'); + } + this.shift(); + return array; + case '<<': // dictionary or stream + var dict = new Dict(this.xref); + while (!isCmd(this.buf1, '>>') && !isEOF(this.buf1)) { + if (!isName(this.buf1)) { + info('Malformed dictionary: key must be a name object'); + this.shift(); + continue; + } - if (c === EOF || c === TILDA_CHAR) { - break; + var key = this.buf1.name; + this.shift(); + if (isEOF(this.buf1)) { + break; + } + dict.set(key, this.getObj(cipherTransform)); + } + if (isEOF(this.buf1)) { + error('End of file inside dictionary'); + } + + // Stream objects are not allowed inside content streams or + // object streams. + if (isCmd(this.buf2, 'stream')) { + return (this.allowStreams ? + this.makeStream(dict, cipherTransform) : dict); + } + this.shift(); + return dict; + default: // simple object + return buf1; } } - buffer = this.ensureBuffer(bufferLength + i - 1); - this.bufferLength += i - 1; - // partial ending; - if (i < 5) { - for (; i < 5; ++i) { - input[i] = 0x21 + 84; + if (isInt(buf1)) { // indirect reference or integer + var num = buf1; + if (isInt(this.buf1) && isCmd(this.buf2, 'R')) { + var ref = new Ref(num, this.buf1); + this.shift(); + this.shift(); + return ref; } - this.eof = true; + return num; } - var t = 0; - for (i = 0; i < 5; ++i) { - t = t * 85 + (input[i] - 0x21); + + if (isString(buf1)) { // string + var str = buf1; + if (cipherTransform) { + str = cipherTransform.decryptString(str); + } + return str; } - for (i = 3; i >= 0; --i) { - buffer[bufferLength + i] = t & 0xFF; - t >>= 8; + // simple object + return buf1; + }, + /** + * Find the end of the stream by searching for the /EI\s/. + * @returns {number} The inline stream length. + */ + findDefaultInlineStreamEnd: + function Parser_findDefaultInlineStreamEnd(stream) { + var E = 0x45, I = 0x49, SPACE = 0x20, LF = 0xA, CR = 0xD; + var startPos = stream.pos, state = 0, ch, i, n, followingBytes; + while ((ch = stream.getByte()) !== -1) { + if (state === 0) { + state = (ch === E) ? 1 : 0; + } else if (state === 1) { + state = (ch === I) ? 2 : 0; + } else { + assert(state === 2); + if (ch === SPACE || ch === LF || ch === CR) { + // Let's check the next five bytes are ASCII... just be sure. + n = 5; + followingBytes = stream.peekBytes(n); + for (i = 0; i < n; i++) { + ch = followingBytes[i]; + if (ch !== LF && ch !== CR && (ch < SPACE || ch > 0x7F)) { + // Not a LF, CR, SPACE or any visible ASCII character, i.e. + // it's binary stuff. Resetting the state. + state = 0; + break; + } + } + if (state === 2) { + break; // Finished! + } + } else { + state = 0; + } + } } - } - }; + return ((stream.pos - 4) - startPos); + }, + /** + * Find the EOI (end-of-image) marker 0xFFD9 of the stream. + * @returns {number} The inline stream length. + */ + findDCTDecodeInlineStreamEnd: + function Parser_findDCTDecodeInlineStreamEnd(stream) { + var startPos = stream.pos, foundEOI = false, b, markerLength, length; + while ((b = stream.getByte()) !== -1) { + if (b !== 0xFF) { // Not a valid marker. + continue; + } + switch (stream.getByte()) { + case 0x00: // Byte stuffing. + // 0xFF00 appears to be a very common byte sequence in JPEG images. + break; - return Ascii85Stream; -})(); + case 0xFF: // Fill byte. + // Avoid skipping a valid marker, resetting the stream position. + stream.skip(-1); + break; -var AsciiHexStream = (function AsciiHexStreamClosure() { - function AsciiHexStream(str, maybeLength) { - this.str = str; - this.dict = str.dict; + case 0xD9: // EOI + foundEOI = true; + break; - this.firstDigit = -1; + case 0xC0: // SOF0 + case 0xC1: // SOF1 + case 0xC2: // SOF2 + case 0xC3: // SOF3 - // Most streams increase in size when decoded, but AsciiHex streams shrink - // by 50%. - if (maybeLength) { - maybeLength = 0.5 * maybeLength; - } - DecodeStream.call(this, maybeLength); - } + case 0xC5: // SOF5 + case 0xC6: // SOF6 + case 0xC7: // SOF7 - AsciiHexStream.prototype = Object.create(DecodeStream.prototype); + case 0xC9: // SOF9 + case 0xCA: // SOF10 + case 0xCB: // SOF11 - AsciiHexStream.prototype.readBlock = function AsciiHexStream_readBlock() { - var UPSTREAM_BLOCK_SIZE = 8000; - var bytes = this.str.getBytes(UPSTREAM_BLOCK_SIZE); - if (!bytes.length) { - this.eof = true; - return; - } + case 0xCD: // SOF13 + case 0xCE: // SOF14 + case 0xCF: // SOF15 - var maxDecodeLength = (bytes.length + 1) >> 1; - var buffer = this.ensureBuffer(this.bufferLength + maxDecodeLength); - var bufferLength = this.bufferLength; + case 0xC4: // DHT + case 0xCC: // DAC - var firstDigit = this.firstDigit; - for (var i = 0, ii = bytes.length; i < ii; i++) { - var ch = bytes[i], digit; - if (ch >= 0x30 && ch <= 0x39) { // '0'-'9' - digit = ch & 0x0F; - } else if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) { - // 'A'-'Z', 'a'-'z' - digit = (ch & 0x0F) + 9; - } else if (ch === 0x3E) { // '>' - this.eof = true; - break; - } else { // probably whitespace - continue; // ignoring + case 0xDA: // SOS + case 0xDB: // DQT + case 0xDC: // DNL + case 0xDD: // DRI + case 0xDE: // DHP + case 0xDF: // EXP + + case 0xE0: // APP0 + case 0xE1: // APP1 + case 0xE2: // APP2 + case 0xE3: // APP3 + case 0xE4: // APP4 + case 0xE5: // APP5 + case 0xE6: // APP6 + case 0xE7: // APP7 + case 0xE8: // APP8 + case 0xE9: // APP9 + case 0xEA: // APP10 + case 0xEB: // APP11 + case 0xEC: // APP12 + case 0xED: // APP13 + case 0xEE: // APP14 + case 0xEF: // APP15 + + case 0xFE: // COM + // The marker should be followed by the length of the segment. + markerLength = stream.getUint16(); + if (markerLength > 2) { + // |markerLength| contains the byte length of the marker segment, + // including its own length (2 bytes) and excluding the marker. + stream.skip(markerLength - 2); // Jump to the next marker. + } else { + // The marker length is invalid, resetting the stream position. + stream.skip(-2); + } + break; + } + if (foundEOI) { + break; + } } - if (firstDigit < 0) { - firstDigit = digit; + length = stream.pos - startPos; + if (b === -1) { + warn('Inline DCTDecode image stream: ' + + 'EOI marker not found, searching for /EI/ instead.'); + stream.skip(-length); // Reset the stream position. + return this.findDefaultInlineStreamEnd(stream); + } + this.inlineStreamSkipEI(stream); + return length; + }, + /** + * Find the EOD (end-of-data) marker '~>' (i.e. TILDE + GT) of the stream. + * @returns {number} The inline stream length. + */ + findASCII85DecodeInlineStreamEnd: + function Parser_findASCII85DecodeInlineStreamEnd(stream) { + var TILDE = 0x7E, GT = 0x3E; + var startPos = stream.pos, ch, length; + while ((ch = stream.getByte()) !== -1) { + if (ch === TILDE && stream.peekByte() === GT) { + stream.skip(); + break; + } + } + length = stream.pos - startPos; + if (ch === -1) { + warn('Inline ASCII85Decode image stream: ' + + 'EOD marker not found, searching for /EI/ instead.'); + stream.skip(-length); // Reset the stream position. + return this.findDefaultInlineStreamEnd(stream); + } + this.inlineStreamSkipEI(stream); + return length; + }, + /** + * Find the EOD (end-of-data) marker '>' (i.e. GT) of the stream. + * @returns {number} The inline stream length. + */ + findASCIIHexDecodeInlineStreamEnd: + function Parser_findASCIIHexDecodeInlineStreamEnd(stream) { + var GT = 0x3E; + var startPos = stream.pos, ch, length; + while ((ch = stream.getByte()) !== -1) { + if (ch === GT) { + break; + } + } + length = stream.pos - startPos; + if (ch === -1) { + warn('Inline ASCIIHexDecode image stream: ' + + 'EOD marker not found, searching for /EI/ instead.'); + stream.skip(-length); // Reset the stream position. + return this.findDefaultInlineStreamEnd(stream); + } + this.inlineStreamSkipEI(stream); + return length; + }, + /** + * Skip over the /EI/ for streams where we search for an EOD marker. + */ + inlineStreamSkipEI: function Parser_inlineStreamSkipEI(stream) { + var E = 0x45, I = 0x49; + var state = 0, ch; + while ((ch = stream.getByte()) !== -1) { + if (state === 0) { + state = (ch === E) ? 1 : 0; + } else if (state === 1) { + state = (ch === I) ? 2 : 0; + } else if (state === 2) { + break; + } + } + }, + makeInlineImage: function Parser_makeInlineImage(cipherTransform) { + var lexer = this.lexer; + var stream = lexer.stream; + + // Parse dictionary. + var dict = new Dict(this.xref); + while (!isCmd(this.buf1, 'ID') && !isEOF(this.buf1)) { + if (!isName(this.buf1)) { + error('Dictionary key must be a name object'); + } + var key = this.buf1.name; + this.shift(); + if (isEOF(this.buf1)) { + break; + } + dict.set(key, this.getObj(cipherTransform)); + } + + // Extract the name of the first (i.e. the current) image filter. + var filter = dict.get('Filter', 'F'), filterName; + if (isName(filter)) { + filterName = filter.name; + } else if (isArray(filter) && isName(filter[0])) { + filterName = filter[0].name; + } + + // Parse image stream. + var startPos = stream.pos, length, i, ii; + if (filterName === 'DCTDecode' || filterName === 'DCT') { + length = this.findDCTDecodeInlineStreamEnd(stream); + } else if (filterName === 'ASCII85Decide' || filterName === 'A85') { + length = this.findASCII85DecodeInlineStreamEnd(stream); + } else if (filterName === 'ASCIIHexDecode' || filterName === 'AHx') { + length = this.findASCIIHexDecodeInlineStreamEnd(stream); } else { - buffer[bufferLength++] = (firstDigit << 4) | digit; - firstDigit = -1; + length = this.findDefaultInlineStreamEnd(stream); } - } - if (firstDigit >= 0 && this.eof) { - // incomplete byte - buffer[bufferLength++] = (firstDigit << 4); - firstDigit = -1; - } - this.firstDigit = firstDigit; - this.bufferLength = bufferLength; - }; - - return AsciiHexStream; -})(); - -var RunLengthStream = (function RunLengthStreamClosure() { - function RunLengthStream(str, maybeLength) { - this.str = str; - this.dict = str.dict; + var imageStream = stream.makeSubStream(startPos, length, dict); - DecodeStream.call(this, maybeLength); - } + // Cache all images below the MAX_LENGTH_TO_CACHE threshold by their + // adler32 checksum. + var adler32; + if (length < MAX_LENGTH_TO_CACHE) { + var imageBytes = imageStream.getBytes(); + imageStream.reset(); - RunLengthStream.prototype = Object.create(DecodeStream.prototype); + var a = 1; + var b = 0; + for (i = 0, ii = imageBytes.length; i < ii; ++i) { + // No modulo required in the loop if imageBytes.length < 5552. + a += imageBytes[i] & 0xff; + b += a; + } + adler32 = ((b % 65521) << 16) | (a % 65521); - RunLengthStream.prototype.readBlock = function RunLengthStream_readBlock() { - // The repeatHeader has following format. The first byte defines type of run - // and amount of bytes to repeat/copy: n = 0 through 127 - copy next n bytes - // (in addition to the second byte from the header), n = 129 through 255 - - // duplicate the second byte from the header (257 - n) times, n = 128 - end. - var repeatHeader = this.str.getBytes(2); - if (!repeatHeader || repeatHeader.length < 2 || repeatHeader[0] === 128) { - this.eof = true; - return; - } + if (this.imageCache.adler32 === adler32) { + this.buf2 = Cmd.get('EI'); + this.shift(); - var buffer; - var bufferLength = this.bufferLength; - var n = repeatHeader[0]; - if (n < 128) { - // copy n bytes - buffer = this.ensureBuffer(bufferLength + n + 1); - buffer[bufferLength++] = repeatHeader[1]; - if (n > 0) { - var source = this.str.getBytes(n); - buffer.set(source, bufferLength); - bufferLength += n; - } - } else { - n = 257 - n; - var b = repeatHeader[1]; - buffer = this.ensureBuffer(bufferLength + n + 1); - for (var i = 0; i < n; i++) { - buffer[bufferLength++] = b; + this.imageCache[adler32].reset(); + return this.imageCache[adler32]; + } } - } - this.bufferLength = bufferLength; - }; - return RunLengthStream; -})(); + if (cipherTransform) { + imageStream = cipherTransform.createStream(imageStream, length); + } -var CCITTFaxStream = (function CCITTFaxStreamClosure() { + imageStream = this.filter(imageStream, dict, length); + imageStream.dict = dict; + if (adler32 !== undefined) { + imageStream.cacheKey = 'inline_' + length + '_' + adler32; + this.imageCache[adler32] = imageStream; + } - var ccittEOL = -2; - var twoDimPass = 0; - var twoDimHoriz = 1; - var twoDimVert0 = 2; - var twoDimVertR1 = 3; - var twoDimVertL1 = 4; - var twoDimVertR2 = 5; - var twoDimVertL2 = 6; - var twoDimVertR3 = 7; - var twoDimVertL3 = 8; + this.buf2 = Cmd.get('EI'); + this.shift(); - var twoDimTable = [ - [-1, -1], [-1, -1], // 000000x - [7, twoDimVertL3], // 0000010 - [7, twoDimVertR3], // 0000011 - [6, twoDimVertL2], [6, twoDimVertL2], // 000010x - [6, twoDimVertR2], [6, twoDimVertR2], // 000011x - [4, twoDimPass], [4, twoDimPass], // 0001xxx - [4, twoDimPass], [4, twoDimPass], - [4, twoDimPass], [4, twoDimPass], - [4, twoDimPass], [4, twoDimPass], - [3, twoDimHoriz], [3, twoDimHoriz], // 001xxxx - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimHoriz], [3, twoDimHoriz], - [3, twoDimVertL1], [3, twoDimVertL1], // 010xxxx - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertL1], [3, twoDimVertL1], - [3, twoDimVertR1], [3, twoDimVertR1], // 011xxxx - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [3, twoDimVertR1], [3, twoDimVertR1], - [1, twoDimVert0], [1, twoDimVert0], // 1xxxxxx - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0], - [1, twoDimVert0], [1, twoDimVert0] - ]; + return imageStream; + }, + makeStream: function Parser_makeStream(dict, cipherTransform) { + var lexer = this.lexer; + var stream = lexer.stream; - var whiteTable1 = [ - [-1, -1], // 00000 - [12, ccittEOL], // 00001 - [-1, -1], [-1, -1], // 0001x - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 001xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 010xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 011xx - [11, 1792], [11, 1792], // 1000x - [12, 1984], // 10010 - [12, 2048], // 10011 - [12, 2112], // 10100 - [12, 2176], // 10101 - [12, 2240], // 10110 - [12, 2304], // 10111 - [11, 1856], [11, 1856], // 1100x - [11, 1920], [11, 1920], // 1101x - [12, 2368], // 11100 - [12, 2432], // 11101 - [12, 2496], // 11110 - [12, 2560] // 11111 - ]; + // get stream start position + lexer.skipToNextLine(); + var pos = stream.pos - 1; - var whiteTable2 = [ - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000000xx - [8, 29], [8, 29], // 00000010x - [8, 30], [8, 30], // 00000011x - [8, 45], [8, 45], // 00000100x - [8, 46], [8, 46], // 00000101x - [7, 22], [7, 22], [7, 22], [7, 22], // 0000011xx - [7, 23], [7, 23], [7, 23], [7, 23], // 0000100xx - [8, 47], [8, 47], // 00001010x - [8, 48], [8, 48], // 00001011x - [6, 13], [6, 13], [6, 13], [6, 13], // 000011xxx - [6, 13], [6, 13], [6, 13], [6, 13], - [7, 20], [7, 20], [7, 20], [7, 20], // 0001000xx - [8, 33], [8, 33], // 00010010x - [8, 34], [8, 34], // 00010011x - [8, 35], [8, 35], // 00010100x - [8, 36], [8, 36], // 00010101x - [8, 37], [8, 37], // 00010110x - [8, 38], [8, 38], // 00010111x - [7, 19], [7, 19], [7, 19], [7, 19], // 0001100xx - [8, 31], [8, 31], // 00011010x - [8, 32], [8, 32], // 00011011x - [6, 1], [6, 1], [6, 1], [6, 1], // 000111xxx - [6, 1], [6, 1], [6, 1], [6, 1], - [6, 12], [6, 12], [6, 12], [6, 12], // 001000xxx - [6, 12], [6, 12], [6, 12], [6, 12], - [8, 53], [8, 53], // 00100100x - [8, 54], [8, 54], // 00100101x - [7, 26], [7, 26], [7, 26], [7, 26], // 0010011xx - [8, 39], [8, 39], // 00101000x - [8, 40], [8, 40], // 00101001x - [8, 41], [8, 41], // 00101010x - [8, 42], [8, 42], // 00101011x - [8, 43], [8, 43], // 00101100x - [8, 44], [8, 44], // 00101101x - [7, 21], [7, 21], [7, 21], [7, 21], // 0010111xx - [7, 28], [7, 28], [7, 28], [7, 28], // 0011000xx - [8, 61], [8, 61], // 00110010x - [8, 62], [8, 62], // 00110011x - [8, 63], [8, 63], // 00110100x - [8, 0], [8, 0], // 00110101x - [8, 320], [8, 320], // 00110110x - [8, 384], [8, 384], // 00110111x - [5, 10], [5, 10], [5, 10], [5, 10], // 00111xxxx - [5, 10], [5, 10], [5, 10], [5, 10], - [5, 10], [5, 10], [5, 10], [5, 10], - [5, 10], [5, 10], [5, 10], [5, 10], - [5, 11], [5, 11], [5, 11], [5, 11], // 01000xxxx - [5, 11], [5, 11], [5, 11], [5, 11], - [5, 11], [5, 11], [5, 11], [5, 11], - [5, 11], [5, 11], [5, 11], [5, 11], - [7, 27], [7, 27], [7, 27], [7, 27], // 0100100xx - [8, 59], [8, 59], // 01001010x - [8, 60], [8, 60], // 01001011x - [9, 1472], // 010011000 - [9, 1536], // 010011001 - [9, 1600], // 010011010 - [9, 1728], // 010011011 - [7, 18], [7, 18], [7, 18], [7, 18], // 0100111xx - [7, 24], [7, 24], [7, 24], [7, 24], // 0101000xx - [8, 49], [8, 49], // 01010010x - [8, 50], [8, 50], // 01010011x - [8, 51], [8, 51], // 01010100x - [8, 52], [8, 52], // 01010101x - [7, 25], [7, 25], [7, 25], [7, 25], // 0101011xx - [8, 55], [8, 55], // 01011000x - [8, 56], [8, 56], // 01011001x - [8, 57], [8, 57], // 01011010x - [8, 58], [8, 58], // 01011011x - [6, 192], [6, 192], [6, 192], [6, 192], // 010111xxx - [6, 192], [6, 192], [6, 192], [6, 192], - [6, 1664], [6, 1664], [6, 1664], [6, 1664], // 011000xxx - [6, 1664], [6, 1664], [6, 1664], [6, 1664], - [8, 448], [8, 448], // 01100100x - [8, 512], [8, 512], // 01100101x - [9, 704], // 011001100 - [9, 768], // 011001101 - [8, 640], [8, 640], // 01100111x - [8, 576], [8, 576], // 01101000x - [9, 832], // 011010010 - [9, 896], // 011010011 - [9, 960], // 011010100 - [9, 1024], // 011010101 - [9, 1088], // 011010110 - [9, 1152], // 011010111 - [9, 1216], // 011011000 - [9, 1280], // 011011001 - [9, 1344], // 011011010 - [9, 1408], // 011011011 - [7, 256], [7, 256], [7, 256], [7, 256], // 0110111xx - [4, 2], [4, 2], [4, 2], [4, 2], // 0111xxxxx - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 2], [4, 2], [4, 2], [4, 2], - [4, 3], [4, 3], [4, 3], [4, 3], // 1000xxxxx - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [4, 3], [4, 3], [4, 3], [4, 3], - [5, 128], [5, 128], [5, 128], [5, 128], // 10010xxxx - [5, 128], [5, 128], [5, 128], [5, 128], - [5, 128], [5, 128], [5, 128], [5, 128], - [5, 128], [5, 128], [5, 128], [5, 128], - [5, 8], [5, 8], [5, 8], [5, 8], // 10011xxxx - [5, 8], [5, 8], [5, 8], [5, 8], - [5, 8], [5, 8], [5, 8], [5, 8], - [5, 8], [5, 8], [5, 8], [5, 8], - [5, 9], [5, 9], [5, 9], [5, 9], // 10100xxxx - [5, 9], [5, 9], [5, 9], [5, 9], - [5, 9], [5, 9], [5, 9], [5, 9], - [5, 9], [5, 9], [5, 9], [5, 9], - [6, 16], [6, 16], [6, 16], [6, 16], // 101010xxx - [6, 16], [6, 16], [6, 16], [6, 16], - [6, 17], [6, 17], [6, 17], [6, 17], // 101011xxx - [6, 17], [6, 17], [6, 17], [6, 17], - [4, 4], [4, 4], [4, 4], [4, 4], // 1011xxxxx - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 4], [4, 4], [4, 4], [4, 4], - [4, 5], [4, 5], [4, 5], [4, 5], // 1100xxxxx - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [4, 5], [4, 5], [4, 5], [4, 5], - [6, 14], [6, 14], [6, 14], [6, 14], // 110100xxx - [6, 14], [6, 14], [6, 14], [6, 14], - [6, 15], [6, 15], [6, 15], [6, 15], // 110101xxx - [6, 15], [6, 15], [6, 15], [6, 15], - [5, 64], [5, 64], [5, 64], [5, 64], // 11011xxxx - [5, 64], [5, 64], [5, 64], [5, 64], - [5, 64], [5, 64], [5, 64], [5, 64], - [5, 64], [5, 64], [5, 64], [5, 64], - [4, 6], [4, 6], [4, 6], [4, 6], // 1110xxxxx - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 6], [4, 6], [4, 6], [4, 6], - [4, 7], [4, 7], [4, 7], [4, 7], // 1111xxxxx - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7], - [4, 7], [4, 7], [4, 7], [4, 7] - ]; + // get length + var length = dict.get('Length'); + if (!isInt(length)) { + info('Bad ' + length + ' attribute in stream'); + length = 0; + } - var blackTable1 = [ - [-1, -1], [-1, -1], // 000000000000x - [12, ccittEOL], [12, ccittEOL], // 000000000001x - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000001xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000010xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000011xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000100xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000101xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000110xx - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 00000000111xx - [11, 1792], [11, 1792], [11, 1792], [11, 1792], // 00000001000xx - [12, 1984], [12, 1984], // 000000010010x - [12, 2048], [12, 2048], // 000000010011x - [12, 2112], [12, 2112], // 000000010100x - [12, 2176], [12, 2176], // 000000010101x - [12, 2240], [12, 2240], // 000000010110x - [12, 2304], [12, 2304], // 000000010111x - [11, 1856], [11, 1856], [11, 1856], [11, 1856], // 00000001100xx - [11, 1920], [11, 1920], [11, 1920], [11, 1920], // 00000001101xx - [12, 2368], [12, 2368], // 000000011100x - [12, 2432], [12, 2432], // 000000011101x - [12, 2496], [12, 2496], // 000000011110x - [12, 2560], [12, 2560], // 000000011111x - [10, 18], [10, 18], [10, 18], [10, 18], // 0000001000xxx - [10, 18], [10, 18], [10, 18], [10, 18], - [12, 52], [12, 52], // 000000100100x - [13, 640], // 0000001001010 - [13, 704], // 0000001001011 - [13, 768], // 0000001001100 - [13, 832], // 0000001001101 - [12, 55], [12, 55], // 000000100111x - [12, 56], [12, 56], // 000000101000x - [13, 1280], // 0000001010010 - [13, 1344], // 0000001010011 - [13, 1408], // 0000001010100 - [13, 1472], // 0000001010101 - [12, 59], [12, 59], // 000000101011x - [12, 60], [12, 60], // 000000101100x - [13, 1536], // 0000001011010 - [13, 1600], // 0000001011011 - [11, 24], [11, 24], [11, 24], [11, 24], // 00000010111xx - [11, 25], [11, 25], [11, 25], [11, 25], // 00000011000xx - [13, 1664], // 0000001100100 - [13, 1728], // 0000001100101 - [12, 320], [12, 320], // 000000110011x - [12, 384], [12, 384], // 000000110100x - [12, 448], [12, 448], // 000000110101x - [13, 512], // 0000001101100 - [13, 576], // 0000001101101 - [12, 53], [12, 53], // 000000110111x - [12, 54], [12, 54], // 000000111000x - [13, 896], // 0000001110010 - [13, 960], // 0000001110011 - [13, 1024], // 0000001110100 - [13, 1088], // 0000001110101 - [13, 1152], // 0000001110110 - [13, 1216], // 0000001110111 - [10, 64], [10, 64], [10, 64], [10, 64], // 0000001111xxx - [10, 64], [10, 64], [10, 64], [10, 64] - ]; + // skip over the stream data + stream.pos = pos + length; + lexer.nextChar(); - var blackTable2 = [ - [8, 13], [8, 13], [8, 13], [8, 13], // 00000100xxxx - [8, 13], [8, 13], [8, 13], [8, 13], - [8, 13], [8, 13], [8, 13], [8, 13], - [8, 13], [8, 13], [8, 13], [8, 13], - [11, 23], [11, 23], // 00000101000x - [12, 50], // 000001010010 - [12, 51], // 000001010011 - [12, 44], // 000001010100 - [12, 45], // 000001010101 - [12, 46], // 000001010110 - [12, 47], // 000001010111 - [12, 57], // 000001011000 - [12, 58], // 000001011001 - [12, 61], // 000001011010 - [12, 256], // 000001011011 - [10, 16], [10, 16], [10, 16], [10, 16], // 0000010111xx - [10, 17], [10, 17], [10, 17], [10, 17], // 0000011000xx - [12, 48], // 000001100100 - [12, 49], // 000001100101 - [12, 62], // 000001100110 - [12, 63], // 000001100111 - [12, 30], // 000001101000 - [12, 31], // 000001101001 - [12, 32], // 000001101010 - [12, 33], // 000001101011 - [12, 40], // 000001101100 - [12, 41], // 000001101101 - [11, 22], [11, 22], // 00000110111x - [8, 14], [8, 14], [8, 14], [8, 14], // 00000111xxxx - [8, 14], [8, 14], [8, 14], [8, 14], - [8, 14], [8, 14], [8, 14], [8, 14], - [8, 14], [8, 14], [8, 14], [8, 14], - [7, 10], [7, 10], [7, 10], [7, 10], // 0000100xxxxx - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 10], [7, 10], [7, 10], [7, 10], - [7, 11], [7, 11], [7, 11], [7, 11], // 0000101xxxxx - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [7, 11], [7, 11], [7, 11], [7, 11], - [9, 15], [9, 15], [9, 15], [9, 15], // 000011000xxx - [9, 15], [9, 15], [9, 15], [9, 15], - [12, 128], // 000011001000 - [12, 192], // 000011001001 - [12, 26], // 000011001010 - [12, 27], // 000011001011 - [12, 28], // 000011001100 - [12, 29], // 000011001101 - [11, 19], [11, 19], // 00001100111x - [11, 20], [11, 20], // 00001101000x - [12, 34], // 000011010010 - [12, 35], // 000011010011 - [12, 36], // 000011010100 - [12, 37], // 000011010101 - [12, 38], // 000011010110 - [12, 39], // 000011010111 - [11, 21], [11, 21], // 00001101100x - [12, 42], // 000011011010 - [12, 43], // 000011011011 - [10, 0], [10, 0], [10, 0], [10, 0], // 0000110111xx - [7, 12], [7, 12], [7, 12], [7, 12], // 0000111xxxxx - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12], - [7, 12], [7, 12], [7, 12], [7, 12] - ]; + // Shift '>>' and check whether the new object marks the end of the stream + if (this.tryShift() && isCmd(this.buf2, 'endstream')) { + this.shift(); // 'stream' + } else { + // bad stream length, scanning for endstream + stream.pos = pos; + var SCAN_BLOCK_SIZE = 2048; + var ENDSTREAM_SIGNATURE_LENGTH = 9; + var ENDSTREAM_SIGNATURE = [0x65, 0x6E, 0x64, 0x73, 0x74, 0x72, 0x65, + 0x61, 0x6D]; + var skipped = 0, found = false, i, j; + while (stream.pos < stream.end) { + var scanBytes = stream.peekBytes(SCAN_BLOCK_SIZE); + var scanLength = scanBytes.length - ENDSTREAM_SIGNATURE_LENGTH; + if (scanLength <= 0) { + break; + } + found = false; + for (i = 0, j = 0; i < scanLength; i++) { + var b = scanBytes[i]; + if (b !== ENDSTREAM_SIGNATURE[j]) { + i -= j; + j = 0; + } else { + j++; + if (j >= ENDSTREAM_SIGNATURE_LENGTH) { + i++; + found = true; + break; + } + } + } + if (found) { + skipped += i - ENDSTREAM_SIGNATURE_LENGTH; + stream.pos += i - ENDSTREAM_SIGNATURE_LENGTH; + break; + } + skipped += scanLength; + stream.pos += scanLength; + } + if (!found) { + error('Missing endstream'); + } + length = skipped; - var blackTable3 = [ - [-1, -1], [-1, -1], [-1, -1], [-1, -1], // 0000xx - [6, 9], // 000100 - [6, 8], // 000101 - [5, 7], [5, 7], // 00011x - [4, 6], [4, 6], [4, 6], [4, 6], // 0010xx - [4, 5], [4, 5], [4, 5], [4, 5], // 0011xx - [3, 1], [3, 1], [3, 1], [3, 1], // 010xxx - [3, 1], [3, 1], [3, 1], [3, 1], - [3, 4], [3, 4], [3, 4], [3, 4], // 011xxx - [3, 4], [3, 4], [3, 4], [3, 4], - [2, 3], [2, 3], [2, 3], [2, 3], // 10xxxx - [2, 3], [2, 3], [2, 3], [2, 3], - [2, 3], [2, 3], [2, 3], [2, 3], - [2, 3], [2, 3], [2, 3], [2, 3], - [2, 2], [2, 2], [2, 2], [2, 2], // 11xxxx - [2, 2], [2, 2], [2, 2], [2, 2], - [2, 2], [2, 2], [2, 2], [2, 2], - [2, 2], [2, 2], [2, 2], [2, 2] - ]; + lexer.nextChar(); + this.shift(); + this.shift(); + } + this.shift(); // 'endstream' - function CCITTFaxStream(str, maybeLength, params) { - this.str = str; - this.dict = str.dict; + stream = stream.makeSubStream(pos, length, dict); + if (cipherTransform) { + stream = cipherTransform.createStream(stream, length); + } + stream = this.filter(stream, dict, length); + stream.dict = dict; + return stream; + }, + filter: function Parser_filter(stream, dict, length) { + var filter = dict.get('Filter', 'F'); + var params = dict.get('DecodeParms', 'DP'); + if (isName(filter)) { + return this.makeFilter(stream, filter.name, length, params); + } - params = params || Dict.empty; + var maybeLength = length; + if (isArray(filter)) { + var filterArray = filter; + var paramsArray = params; + for (var i = 0, ii = filterArray.length; i < ii; ++i) { + filter = filterArray[i]; + if (!isName(filter)) { + error('Bad filter name: ' + filter); + } - this.encoding = params.get('K') || 0; - this.eoline = params.get('EndOfLine') || false; - this.byteAlign = params.get('EncodedByteAlign') || false; - this.columns = params.get('Columns') || 1728; - this.rows = params.get('Rows') || 0; - var eoblock = params.get('EndOfBlock'); - if (eoblock === null || eoblock === undefined) { - eoblock = true; + params = null; + if (isArray(paramsArray) && (i in paramsArray)) { + params = paramsArray[i]; + } + stream = this.makeFilter(stream, filter.name, maybeLength, params); + // after the first stream the length variable is invalid + maybeLength = null; + } + } + return stream; + }, + makeFilter: function Parser_makeFilter(stream, name, maybeLength, params) { + if (stream.dict.get('Length') === 0 && !maybeLength) { + warn('Empty "' + name + '" stream.'); + return new NullStream(stream); + } + try { + if (params && this.xref) { + params = this.xref.fetchIfRef(params); + } + var xrefStreamStats = this.xref.stats.streamTypes; + if (name === 'FlateDecode' || name === 'Fl') { + xrefStreamStats[StreamType.FLATE] = true; + if (params) { + return new PredictorStream(new FlateStream(stream, maybeLength), + maybeLength, params); + } + return new FlateStream(stream, maybeLength); + } + if (name === 'LZWDecode' || name === 'LZW') { + xrefStreamStats[StreamType.LZW] = true; + var earlyChange = 1; + if (params) { + if (params.has('EarlyChange')) { + earlyChange = params.get('EarlyChange'); + } + return new PredictorStream( + new LZWStream(stream, maybeLength, earlyChange), + maybeLength, params); + } + return new LZWStream(stream, maybeLength, earlyChange); + } + if (name === 'DCTDecode' || name === 'DCT') { + xrefStreamStats[StreamType.DCT] = true; + return new JpegStream(stream, maybeLength, stream.dict, this.xref); + } + if (name === 'JPXDecode' || name === 'JPX') { + xrefStreamStats[StreamType.JPX] = true; + return new JpxStream(stream, maybeLength, stream.dict); + } + if (name === 'ASCII85Decode' || name === 'A85') { + xrefStreamStats[StreamType.A85] = true; + return new Ascii85Stream(stream, maybeLength); + } + if (name === 'ASCIIHexDecode' || name === 'AHx') { + xrefStreamStats[StreamType.AHX] = true; + return new AsciiHexStream(stream, maybeLength); + } + if (name === 'CCITTFaxDecode' || name === 'CCF') { + xrefStreamStats[StreamType.CCF] = true; + return new CCITTFaxStream(stream, maybeLength, params); + } + if (name === 'RunLengthDecode' || name === 'RL') { + xrefStreamStats[StreamType.RL] = true; + return new RunLengthStream(stream, maybeLength); + } + if (name === 'JBIG2Decode') { + xrefStreamStats[StreamType.JBIG] = true; + return new Jbig2Stream(stream, maybeLength, stream.dict); + } + warn('filter "' + name + '" not supported yet'); + return stream; + } catch (ex) { + if (ex instanceof MissingDataException) { + throw ex; + } + warn('Invalid stream: \"' + ex + '\"'); + return new NullStream(stream); + } } - this.eoblock = eoblock; - this.black = params.get('BlackIs1') || false; + }; - this.codingLine = new Uint32Array(this.columns + 1); - this.refLine = new Uint32Array(this.columns + 2); + return Parser; +})(); - this.codingLine[0] = this.columns; - this.codingPos = 0; +var Lexer = (function LexerClosure() { + function Lexer(stream, knownCommands) { + this.stream = stream; + this.nextChar(); - this.row = 0; - this.nextLine2D = this.encoding < 0; - this.inputBits = 0; - this.inputBuf = 0; - this.outputBits = 0; + // While lexing, we build up many strings one char at a time. Using += for + // this can result in lots of garbage strings. It's better to build an + // array of single-char strings and then join() them together at the end. + // And reusing a single array (i.e. |this.strBuf|) over and over for this + // purpose uses less memory than using a new array for each string. + this.strBuf = []; - var code1; - while ((code1 = this.lookBits(12)) === 0) { - this.eatBits(1); - } - if (code1 === 1) { - this.eatBits(12); + // The PDFs might have "glued" commands with other commands, operands or + // literals, e.g. "q1". The knownCommands is a dictionary of the valid + // commands and their prefixes. The prefixes are built the following way: + // if there a command that is a prefix of the other valid command or + // literal (e.g. 'f' and 'false') the following prefixes must be included, + // 'fa', 'fal', 'fals'. The prefixes are not needed, if the command has no + // other commands or literals as a prefix. The knowCommands is optional. + this.knownCommands = knownCommands; + } + + Lexer.isSpace = function Lexer_isSpace(ch) { + // Space is one of the following characters: SPACE, TAB, CR or LF. + return (ch === 0x20 || ch === 0x09 || ch === 0x0D || ch === 0x0A); + }; + + // A '1' in this array means the character is white space. A '1' or + // '2' means the character ends a name or command. + var specialChars = [ + 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, // 0x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x + 1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx + ]; + + function toHexDigit(ch) { + if (ch >= 0x30 && ch <= 0x39) { // '0'-'9' + return ch & 0x0F; } - if (this.encoding > 0) { - this.nextLine2D = !this.lookBits(1); - this.eatBits(1); + if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) { + // 'A'-'F', 'a'-'f' + return (ch & 0x0F) + 9; } - - DecodeStream.call(this, maybeLength); + return -1; } - CCITTFaxStream.prototype = Object.create(DecodeStream.prototype); + Lexer.prototype = { + nextChar: function Lexer_nextChar() { + return (this.currentChar = this.stream.getByte()); + }, + peekChar: function Lexer_peekChar() { + return this.stream.peekByte(); + }, + getNumber: function Lexer_getNumber() { + var ch = this.currentChar; + var eNotation = false; + var divideBy = 0; // different from 0 if it's a floating point value + var sign = 1; + + if (ch === 0x2D) { // '-' + sign = -1; + ch = this.nextChar(); + + if (ch === 0x2D) { // '-' + // Ignore double negative (this is consistent with Adobe Reader). + ch = this.nextChar(); + } + } else if (ch === 0x2B) { // '+' + ch = this.nextChar(); + } + if (ch === 0x2E) { // '.' + divideBy = 10; + ch = this.nextChar(); + } + if (ch < 0x30 || ch > 0x39) { // '0' - '9' + error('Invalid number: ' + String.fromCharCode(ch)); + return 0; + } + + var baseValue = ch - 0x30; // '0' + var powerValue = 0; + var powerValueSign = 1; + + while ((ch = this.nextChar()) >= 0) { + if (0x30 <= ch && ch <= 0x39) { // '0' - '9' + var currentDigit = ch - 0x30; // '0' + if (eNotation) { // We are after an 'e' or 'E' + powerValue = powerValue * 10 + currentDigit; + } else { + if (divideBy !== 0) { // We are after a point + divideBy *= 10; + } + baseValue = baseValue * 10 + currentDigit; + } + } else if (ch === 0x2E) { // '.' + if (divideBy === 0) { + divideBy = 1; + } else { + // A number can have only one '.' + break; + } + } else if (ch === 0x2D) { // '-' + // ignore minus signs in the middle of numbers to match + // Adobe's behavior + warn('Badly formated number'); + } else if (ch === 0x45 || ch === 0x65) { // 'E', 'e' + // 'E' can be either a scientific notation or the beginning of a new + // operator + ch = this.peekChar(); + if (ch === 0x2B || ch === 0x2D) { // '+', '-' + powerValueSign = (ch === 0x2D) ? -1 : 1; + this.nextChar(); // Consume the sign character + } else if (ch < 0x30 || ch > 0x39) { // '0' - '9' + // The 'E' must be the beginning of a new operator + break; + } + eNotation = true; + } else { + // the last character doesn't belong to us + break; + } + } + + if (divideBy !== 0) { + baseValue /= divideBy; + } + if (eNotation) { + baseValue *= Math.pow(10, powerValueSign * powerValue); + } + return sign * baseValue; + }, + getString: function Lexer_getString() { + var numParen = 1; + var done = false; + var strBuf = this.strBuf; + strBuf.length = 0; + + var ch = this.nextChar(); + while (true) { + var charBuffered = false; + switch (ch | 0) { + case -1: + warn('Unterminated string'); + done = true; + break; + case 0x28: // '(' + ++numParen; + strBuf.push('('); + break; + case 0x29: // ')' + if (--numParen === 0) { + this.nextChar(); // consume strings ')' + done = true; + } else { + strBuf.push(')'); + } + break; + case 0x5C: // '\\' + ch = this.nextChar(); + switch (ch) { + case -1: + warn('Unterminated string'); + done = true; + break; + case 0x6E: // 'n' + strBuf.push('\n'); + break; + case 0x72: // 'r' + strBuf.push('\r'); + break; + case 0x74: // 't' + strBuf.push('\t'); + break; + case 0x62: // 'b' + strBuf.push('\b'); + break; + case 0x66: // 'f' + strBuf.push('\f'); + break; + case 0x5C: // '\' + case 0x28: // '(' + case 0x29: // ')' + strBuf.push(String.fromCharCode(ch)); + break; + case 0x30: case 0x31: case 0x32: case 0x33: // '0'-'3' + case 0x34: case 0x35: case 0x36: case 0x37: // '4'-'7' + var x = ch & 0x0F; + ch = this.nextChar(); + charBuffered = true; + if (ch >= 0x30 && ch <= 0x37) { // '0'-'7' + x = (x << 3) + (ch & 0x0F); + ch = this.nextChar(); + if (ch >= 0x30 && ch <= 0x37) { // '0'-'7' + charBuffered = false; + x = (x << 3) + (ch & 0x0F); + } + } + strBuf.push(String.fromCharCode(x)); + break; + case 0x0D: // CR + if (this.peekChar() === 0x0A) { // LF + this.nextChar(); + } + break; + case 0x0A: // LF + break; + default: + strBuf.push(String.fromCharCode(ch)); + break; + } + break; + default: + strBuf.push(String.fromCharCode(ch)); + break; + } + if (done) { + break; + } + if (!charBuffered) { + ch = this.nextChar(); + } + } + return strBuf.join(''); + }, + getName: function Lexer_getName() { + var ch, previousCh; + var strBuf = this.strBuf; + strBuf.length = 0; + while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) { + if (ch === 0x23) { // '#' + ch = this.nextChar(); + if (specialChars[ch]) { + warn('Lexer_getName: ' + + 'NUMBER SIGN (#) should be followed by a hexadecimal number.'); + strBuf.push('#'); + break; + } + var x = toHexDigit(ch); + if (x !== -1) { + previousCh = ch; + ch = this.nextChar(); + var x2 = toHexDigit(ch); + if (x2 === -1) { + warn('Lexer_getName: Illegal digit (' + + String.fromCharCode(ch) +') in hexadecimal number.'); + strBuf.push('#', String.fromCharCode(previousCh)); + if (specialChars[ch]) { + break; + } + strBuf.push(String.fromCharCode(ch)); + continue; + } + strBuf.push(String.fromCharCode((x << 4) | x2)); + } else { + strBuf.push('#', String.fromCharCode(ch)); + } + } else { + strBuf.push(String.fromCharCode(ch)); + } + } + if (strBuf.length > 127) { + warn('name token is longer than allowed by the spec: ' + strBuf.length); + } + return Name.get(strBuf.join('')); + }, + getHexString: function Lexer_getHexString() { + var strBuf = this.strBuf; + strBuf.length = 0; + var ch = this.currentChar; + var isFirstHex = true; + var firstDigit; + var secondDigit; + while (true) { + if (ch < 0) { + warn('Unterminated hex string'); + break; + } else if (ch === 0x3E) { // '>' + this.nextChar(); + break; + } else if (specialChars[ch] === 1) { + ch = this.nextChar(); + continue; + } else { + if (isFirstHex) { + firstDigit = toHexDigit(ch); + if (firstDigit === -1) { + warn('Ignoring invalid character "' + ch + '" in hex string'); + ch = this.nextChar(); + continue; + } + } else { + secondDigit = toHexDigit(ch); + if (secondDigit === -1) { + warn('Ignoring invalid character "' + ch + '" in hex string'); + ch = this.nextChar(); + continue; + } + strBuf.push(String.fromCharCode((firstDigit << 4) | secondDigit)); + } + isFirstHex = !isFirstHex; + ch = this.nextChar(); + } + } + return strBuf.join(''); + }, + getObj: function Lexer_getObj() { + // skip whitespace and comments + var comment = false; + var ch = this.currentChar; + while (true) { + if (ch < 0) { + return EOF; + } + if (comment) { + if (ch === 0x0A || ch === 0x0D) { // LF, CR + comment = false; + } + } else if (ch === 0x25) { // '%' + comment = true; + } else if (specialChars[ch] !== 1) { + break; + } + ch = this.nextChar(); + } + + // start reading token + switch (ch | 0) { + case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4' + case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9' + case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.' + return this.getNumber(); + case 0x28: // '(' + return this.getString(); + case 0x2F: // '/' + return this.getName(); + // array punctuation + case 0x5B: // '[' + this.nextChar(); + return Cmd.get('['); + case 0x5D: // ']' + this.nextChar(); + return Cmd.get(']'); + // hex string or dict punctuation + case 0x3C: // '<' + ch = this.nextChar(); + if (ch === 0x3C) { + // dict punctuation + this.nextChar(); + return Cmd.get('<<'); + } + return this.getHexString(); + // dict punctuation + case 0x3E: // '>' + ch = this.nextChar(); + if (ch === 0x3E) { + this.nextChar(); + return Cmd.get('>>'); + } + return Cmd.get('>'); + case 0x7B: // '{' + this.nextChar(); + return Cmd.get('{'); + case 0x7D: // '}' + this.nextChar(); + return Cmd.get('}'); + case 0x29: // ')' + error('Illegal character: ' + ch); + break; + } - CCITTFaxStream.prototype.readBlock = function CCITTFaxStream_readBlock() { - while (!this.eof) { - var c = this.lookChar(); - this.ensureBuffer(this.bufferLength + 1); - this.buffer[this.bufferLength++] = c; + // command + var str = String.fromCharCode(ch); + var knownCommands = this.knownCommands; + var knownCommandFound = knownCommands && knownCommands[str] !== undefined; + while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) { + // stop if known command is found and next character does not make + // the str a command + var possibleCommand = str + String.fromCharCode(ch); + if (knownCommandFound && knownCommands[possibleCommand] === undefined) { + break; + } + if (str.length === 128) { + error('Command token too long: ' + str.length); + } + str = possibleCommand; + knownCommandFound = knownCommands && knownCommands[str] !== undefined; + } + if (str === 'true') { + return true; + } + if (str === 'false') { + return false; + } + if (str === 'null') { + return null; + } + return Cmd.get(str); + }, + skipToNextLine: function Lexer_skipToNextLine() { + var ch = this.currentChar; + while (ch >= 0) { + if (ch === 0x0D) { // CR + ch = this.nextChar(); + if (ch === 0x0A) { // LF + this.nextChar(); + } + break; + } else if (ch === 0x0A) { // LF + this.nextChar(); + break; + } + ch = this.nextChar(); + } } }; - CCITTFaxStream.prototype.addPixels = - function ccittFaxStreamAddPixels(a1, blackPixels) { - var codingLine = this.codingLine; - var codingPos = this.codingPos; + return Lexer; +})(); - if (a1 > codingLine[codingPos]) { - if (a1 > this.columns) { - info('row is wrong length'); - this.err = true; - a1 = this.columns; +var Linearization = { + create: function LinearizationCreate(stream) { + function getInt(name, allowZeroValue) { + var obj = linDict.get(name); + if (isInt(obj) && (allowZeroValue ? obj >= 0 : obj > 0)) { + return obj; } - if ((codingPos & 1) ^ blackPixels) { - ++codingPos; + throw new Error('The "' + name + '" parameter in the linearization ' + + 'dictionary is invalid.'); + } + function getHints() { + var hints = linDict.get('H'), hintsLength, item; + if (isArray(hints) && + ((hintsLength = hints.length) === 2 || hintsLength === 4)) { + for (var index = 0; index < hintsLength; index++) { + if (!(isInt(item = hints[index]) && item > 0)) { + throw new Error('Hint (' + index + + ') in the linearization dictionary is invalid.'); + } + } + return hints; } - - codingLine[codingPos] = a1; + throw new Error('Hint array in the linearization dictionary is invalid.'); } - this.codingPos = codingPos; - }; + var parser = new Parser(new Lexer(stream), false, null); + var obj1 = parser.getObj(); + var obj2 = parser.getObj(); + var obj3 = parser.getObj(); + var linDict = parser.getObj(); + var obj, length; + if (!(isInt(obj1) && isInt(obj2) && isCmd(obj3, 'obj') && isDict(linDict) && + isNum(obj = linDict.get('Linearized')) && obj > 0)) { + return null; // No valid linearization dictionary found. + } else if ((length = getInt('L')) !== stream.length) { + throw new Error('The "L" parameter in the linearization dictionary ' + + 'does not equal the stream length.'); + } + return { + length: length, + hints: getHints(), + objectNumberFirst: getInt('O'), + endFirst: getInt('E'), + numPages: getInt('N'), + mainXRefEntriesOffset: getInt('T'), + pageFirst: (linDict.has('P') ? getInt('P', true) : 0) + }; + } +}; - CCITTFaxStream.prototype.addPixelsNeg = - function ccittFaxStreamAddPixelsNeg(a1, blackPixels) { - var codingLine = this.codingLine; - var codingPos = this.codingPos; +exports.EOF = EOF; +exports.Lexer = Lexer; +exports.Linearization = Linearization; +exports.Parser = Parser; +exports.isEOF = isEOF; - if (a1 > codingLine[codingPos]) { - if (a1 > this.columns) { - info('row is wrong length'); - this.err = true; - a1 = this.columns; - } - if ((codingPos & 1) ^ blackPixels) { - ++codingPos; - } +// TODO refactor to remove dependency on stream.js +coreStream._setCoreParser(exports); +})); - codingLine[codingPos] = a1; - } else if (a1 < codingLine[codingPos]) { - if (a1 < 0) { - info('invalid code'); - this.err = true; - a1 = 0; - } - while (codingPos > 0 && a1 < codingLine[codingPos - 1]) { - --codingPos; - } - codingLine[codingPos] = a1; - } - this.codingPos = codingPos; - }; +(function (root, factory) { + { + factory((root.pdfjsDisplayCanvas = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL); + } +}(this, function (exports, sharedUtil, displayPatternHelper, displayWebGL) { - CCITTFaxStream.prototype.lookChar = function CCITTFaxStream_lookChar() { - var refLine = this.refLine; - var codingLine = this.codingLine; - var columns = this.columns; +var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; +var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; +var ImageKind = sharedUtil.ImageKind; +var OPS = sharedUtil.OPS; +var TextRenderingMode = sharedUtil.TextRenderingMode; +var Uint32ArrayView = sharedUtil.Uint32ArrayView; +var Util = sharedUtil.Util; +var assert = sharedUtil.assert; +var info = sharedUtil.info; +var isNum = sharedUtil.isNum; +var isArray = sharedUtil.isArray; +var error = sharedUtil.error; +var shadow = sharedUtil.shadow; +var warn = sharedUtil.warn; +var TilingPattern = displayPatternHelper.TilingPattern; +var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR; +var WebGLUtils = displayWebGL.WebGLUtils; - var refPos, blackPixels, bits, i; +// contexts store most of the state we need natively. +// However, PDF needs a bit more state, which we store here. - if (this.outputBits === 0) { - if (this.eof) { - return null; - } - this.err = false; +// Minimal font size that would be used during canvas fillText operations. +var MIN_FONT_SIZE = 16; +// Maximum font size that would be used during canvas fillText operations. +var MAX_FONT_SIZE = 100; +var MAX_GROUP_SIZE = 4096; - var code1, code2, code3; - if (this.nextLine2D) { - for (i = 0; codingLine[i] < columns; ++i) { - refLine[i] = codingLine[i]; - } - refLine[i++] = columns; - refLine[i] = columns; - codingLine[0] = 0; - this.codingPos = 0; - refPos = 0; - blackPixels = 0; +// Heuristic value used when enforcing minimum line widths. +var MIN_WIDTH_FACTOR = 0.65; - while (codingLine[this.codingPos] < columns) { - code1 = this.getTwoDimCode(); - switch (code1) { - case twoDimPass: - this.addPixels(refLine[refPos + 1], blackPixels); - if (refLine[refPos + 1] < columns) { - refPos += 2; - } - break; - case twoDimHoriz: - code1 = code2 = 0; - if (blackPixels) { - do { - code1 += (code3 = this.getBlackCode()); - } while (code3 >= 64); - do { - code2 += (code3 = this.getWhiteCode()); - } while (code3 >= 64); - } else { - do { - code1 += (code3 = this.getWhiteCode()); - } while (code3 >= 64); - do { - code2 += (code3 = this.getBlackCode()); - } while (code3 >= 64); - } - this.addPixels(codingLine[this.codingPos] + - code1, blackPixels); - if (codingLine[this.codingPos] < columns) { - this.addPixels(codingLine[this.codingPos] + code2, - blackPixels ^ 1); - } - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - break; - case twoDimVertR3: - this.addPixels(refLine[refPos] + 3, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - ++refPos; - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVertR2: - this.addPixels(refLine[refPos] + 2, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - ++refPos; - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVertR1: - this.addPixels(refLine[refPos] + 1, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - ++refPos; - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVert0: - this.addPixels(refLine[refPos], blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - ++refPos; - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVertL3: - this.addPixelsNeg(refLine[refPos] - 3, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - if (refPos > 0) { - --refPos; - } else { - ++refPos; - } - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVertL2: - this.addPixelsNeg(refLine[refPos] - 2, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - if (refPos > 0) { - --refPos; - } else { - ++refPos; - } - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case twoDimVertL1: - this.addPixelsNeg(refLine[refPos] - 1, blackPixels); - blackPixels ^= 1; - if (codingLine[this.codingPos] < columns) { - if (refPos > 0) { - --refPos; - } else { - ++refPos; - } - while (refLine[refPos] <= codingLine[this.codingPos] && - refLine[refPos] < columns) { - refPos += 2; - } - } - break; - case EOF: - this.addPixels(columns, 0); - this.eof = true; - break; - default: - info('bad 2d code'); - this.addPixels(columns, 0); - this.err = true; - } - } - } else { - codingLine[0] = 0; - this.codingPos = 0; - blackPixels = 0; - while (codingLine[this.codingPos] < columns) { - code1 = 0; - if (blackPixels) { - do { - code1 += (code3 = this.getBlackCode()); - } while (code3 >= 64); - } else { - do { - code1 += (code3 = this.getWhiteCode()); - } while (code3 >= 64); - } - this.addPixels(codingLine[this.codingPos] + code1, blackPixels); - blackPixels ^= 1; - } - } +var COMPILE_TYPE3_GLYPHS = true; +var MAX_SIZE_TO_COMPILE = 1000; - var gotEOL = false; +var FULL_CHUNK_HEIGHT = 16; - if (this.byteAlign) { - this.inputBits &= ~7; - } +function createScratchCanvas(width, height) { + var canvas = document.createElement('canvas'); + canvas.width = width; + canvas.height = height; + return canvas; +} - if (!this.eoblock && this.row === this.rows - 1) { - this.eof = true; - } else { - code1 = this.lookBits(12); - if (this.eoline) { - while (code1 !== EOF && code1 !== 1) { - this.eatBits(1); - code1 = this.lookBits(12); - } - } else { - while (code1 === 0) { - this.eatBits(1); - code1 = this.lookBits(12); - } - } - if (code1 === 1) { - this.eatBits(12); - gotEOL = true; - } else if (code1 === EOF) { - this.eof = true; - } - } +function addContextCurrentTransform(ctx) { + // If the context doesn't expose a `mozCurrentTransform`, add a JS based one. + if (!ctx.mozCurrentTransform) { + ctx._originalSave = ctx.save; + ctx._originalRestore = ctx.restore; + ctx._originalRotate = ctx.rotate; + ctx._originalScale = ctx.scale; + ctx._originalTranslate = ctx.translate; + ctx._originalTransform = ctx.transform; + ctx._originalSetTransform = ctx.setTransform; - if (!this.eof && this.encoding > 0) { - this.nextLine2D = !this.lookBits(1); - this.eatBits(1); - } + ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0]; + ctx._transformStack = []; - if (this.eoblock && gotEOL && this.byteAlign) { - code1 = this.lookBits(12); - if (code1 === 1) { - this.eatBits(12); - if (this.encoding > 0) { - this.lookBits(1); - this.eatBits(1); - } - if (this.encoding >= 0) { - for (i = 0; i < 4; ++i) { - code1 = this.lookBits(12); - if (code1 !== 1) { - info('bad rtc code: ' + code1); - } - this.eatBits(12); - if (this.encoding > 0) { - this.lookBits(1); - this.eatBits(1); - } - } - } - this.eof = true; - } - } else if (this.err && this.eoline) { - while (true) { - code1 = this.lookBits(13); - if (code1 === EOF) { - this.eof = true; - return null; - } - if ((code1 >> 1) === 1) { - break; - } - this.eatBits(1); - } - this.eatBits(12); - if (this.encoding > 0) { - this.eatBits(1); - this.nextLine2D = !(code1 & 1); - } + Object.defineProperty(ctx, 'mozCurrentTransform', { + get: function getCurrentTransform() { + return this._transformMatrix; } + }); - if (codingLine[0] > 0) { - this.outputBits = codingLine[this.codingPos = 0]; - } else { - this.outputBits = codingLine[this.codingPos = 1]; - } - this.row++; - } + Object.defineProperty(ctx, 'mozCurrentTransformInverse', { + get: function getCurrentTransformInverse() { + // Calculation done using WolframAlpha: + // http://www.wolframalpha.com/input/? + // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - var c; - if (this.outputBits >= 8) { - c = (this.codingPos & 1) ? 0 : 0xFF; - this.outputBits -= 8; - if (this.outputBits === 0 && codingLine[this.codingPos] < columns) { - this.codingPos++; - this.outputBits = (codingLine[this.codingPos] - - codingLine[this.codingPos - 1]); - } - } else { - bits = 8; - c = 0; - do { - if (this.outputBits > bits) { - c <<= bits; - if (!(this.codingPos & 1)) { - c |= 0xFF >> (8 - bits); - } - this.outputBits -= bits; - bits = 0; - } else { - c <<= this.outputBits; - if (!(this.codingPos & 1)) { - c |= 0xFF >> (8 - this.outputBits); - } - bits -= this.outputBits; - this.outputBits = 0; - if (codingLine[this.codingPos] < columns) { - this.codingPos++; - this.outputBits = (codingLine[this.codingPos] - - codingLine[this.codingPos - 1]); - } else if (bits > 0) { - c <<= bits; - bits = 0; - } - } - } while (bits); - } - if (this.black) { - c ^= 0xFF; - } - return c; - }; + var m = this._transformMatrix; + var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; - // This functions returns the code found from the table. - // The start and end parameters set the boundaries for searching the table. - // The limit parameter is optional. Function returns an array with three - // values. The first array element indicates whether a valid code is being - // returned. The second array element is the actual code. The third array - // element indicates whether EOF was reached. - CCITTFaxStream.prototype.findTableCode = - function ccittFaxStreamFindTableCode(start, end, table, limit) { + var ad_bc = a * d - b * c; + var bc_ad = b * c - a * d; - var limitValue = limit || 0; - for (var i = start; i <= end; ++i) { - var code = this.lookBits(i); - if (code === EOF) { - return [true, 1, false]; - } - if (i < end) { - code <<= end - i; + return [ + d / ad_bc, + b / bc_ad, + c / bc_ad, + a / ad_bc, + (d * e - c * f) / bc_ad, + (b * e - a * f) / ad_bc + ]; } - if (!limitValue || code >= limitValue) { - var p = table[code - limitValue]; - if (p[0] === i) { - this.eatBits(i); - return [true, p[1], true]; - } + }); + + ctx.save = function ctxSave() { + var old = this._transformMatrix; + this._transformStack.push(old); + this._transformMatrix = old.slice(0, 6); + + this._originalSave(); + }; + + ctx.restore = function ctxRestore() { + var prev = this._transformStack.pop(); + if (prev) { + this._transformMatrix = prev; + this._originalRestore(); } - } - return [false, 0, false]; - }; + }; - CCITTFaxStream.prototype.getTwoDimCode = - function ccittFaxStreamGetTwoDimCode() { + ctx.translate = function ctxTranslate(x, y) { + var m = this._transformMatrix; + m[4] = m[0] * x + m[2] * y + m[4]; + m[5] = m[1] * x + m[3] * y + m[5]; - var code = 0; - var p; - if (this.eoblock) { - code = this.lookBits(7); - p = twoDimTable[code]; - if (p && p[0] > 0) { - this.eatBits(p[0]); - return p[1]; + this._originalTranslate(x, y); + }; + + ctx.scale = function ctxScale(x, y) { + var m = this._transformMatrix; + m[0] = m[0] * x; + m[1] = m[1] * x; + m[2] = m[2] * y; + m[3] = m[3] * y; + + this._originalScale(x, y); + }; + + ctx.transform = function ctxTransform(a, b, c, d, e, f) { + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * a + m[2] * b, + m[1] * a + m[3] * b, + m[0] * c + m[2] * d, + m[1] * c + m[3] * d, + m[0] * e + m[2] * f + m[4], + m[1] * e + m[3] * f + m[5] + ]; + + ctx._originalTransform(a, b, c, d, e, f); + }; + + ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { + this._transformMatrix = [a, b, c, d, e, f]; + + ctx._originalSetTransform(a, b, c, d, e, f); + }; + + ctx.rotate = function ctxRotate(angle) { + var cosValue = Math.cos(angle); + var sinValue = Math.sin(angle); + + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * cosValue + m[2] * sinValue, + m[1] * cosValue + m[3] * sinValue, + m[0] * (-sinValue) + m[2] * cosValue, + m[1] * (-sinValue) + m[3] * cosValue, + m[4], + m[5] + ]; + + this._originalRotate(angle); + }; + } +} + +var CachedCanvases = (function CachedCanvasesClosure() { + function CachedCanvases() { + this.cache = Object.create(null); + } + CachedCanvases.prototype = { + getCanvas: function CachedCanvases_getCanvas(id, width, height, + trackTransform) { + var canvasEntry; + if (this.cache[id] !== undefined) { + canvasEntry = this.cache[id]; + canvasEntry.canvas.width = width; + canvasEntry.canvas.height = height; + // reset canvas transform for emulated mozCurrentTransform, if needed + canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); + } else { + var canvas = createScratchCanvas(width, height); + var ctx = canvas.getContext('2d'); + if (trackTransform) { + addContextCurrentTransform(ctx); + } + this.cache[id] = canvasEntry = {canvas: canvas, context: ctx}; } - } else { - var result = this.findTableCode(1, 7, twoDimTable); - if (result[0] && result[2]) { - return result[1]; + return canvasEntry; + }, + clear: function () { + for (var id in this.cache) { + var canvasEntry = this.cache[id]; + // Zeroing the width and height causes Firefox to release graphics + // resources immediately, which can greatly reduce memory consumption. + canvasEntry.canvas.width = 0; + canvasEntry.canvas.height = 0; + delete this.cache[id]; } } - info('Bad two dim code'); - return EOF; }; + return CachedCanvases; +})(); - CCITTFaxStream.prototype.getWhiteCode = - function ccittFaxStreamGetWhiteCode() { +function compileType3Glyph(imgData) { + var POINT_TO_PROCESS_LIMIT = 1000; - var code = 0; - var p; - if (this.eoblock) { - code = this.lookBits(12); - if (code === EOF) { - return 1; - } + var width = imgData.width, height = imgData.height; + var i, j, j0, width1 = width + 1; + var points = new Uint8Array(width1 * (height + 1)); + var POINT_TYPES = + new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); - if ((code >> 5) === 0) { - p = whiteTable1[code]; - } else { - p = whiteTable2[code >> 3]; - } + // decodes bit-packed mask data + var lineSize = (width + 7) & ~7, data0 = imgData.data; + var data = new Uint8Array(lineSize * height), pos = 0, ii; + for (i = 0, ii = data0.length; i < ii; i++) { + var mask = 128, elem = data0[i]; + while (mask > 0) { + data[pos++] = (elem & mask) ? 0 : 255; + mask >>= 1; + } + } - if (p[0] > 0) { - this.eatBits(p[0]); - return p[1]; - } - } else { - var result = this.findTableCode(1, 9, whiteTable2); - if (result[0]) { - return result[1]; + // finding iteresting points: every point is located between mask pixels, + // so there will be points of the (width + 1)x(height + 1) grid. Every point + // will have flags assigned based on neighboring mask pixels: + // 4 | 8 + // --P-- + // 2 | 1 + // We are interested only in points with the flags: + // - outside corners: 1, 2, 4, 8; + // - inside corners: 7, 11, 13, 14; + // - and, intersections: 5, 10. + var count = 0; + pos = 0; + if (data[pos] !== 0) { + points[0] = 1; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j] = data[pos] ? 2 : 1; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j] = 2; + ++count; + } + for (i = 1; i < height; i++) { + pos = i * lineSize; + j0 = i * width1; + if (data[pos - lineSize] !== data[pos]) { + points[j0] = data[pos] ? 1 : 8; + ++count; + } + // 'sum' is the position of the current pixel configuration in the 'TYPES' + // array (in order 8-1-2-4, so we can use '>>2' to shift the column). + var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); + for (j = 1; j < width; j++) { + sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + + (data[pos - lineSize + 1] ? 8 : 0); + if (POINT_TYPES[sum]) { + points[j0 + j] = POINT_TYPES[sum]; + ++count; } + pos++; + } + if (data[pos - lineSize] !== data[pos]) { + points[j0 + j] = data[pos] ? 2 : 4; + ++count; + } - result = this.findTableCode(11, 12, whiteTable1); - if (result[0]) { - return result[1]; - } + if (count > POINT_TO_PROCESS_LIMIT) { + return null; } - info('bad white code'); - this.eatBits(1); - return 1; - }; + } - CCITTFaxStream.prototype.getBlackCode = - function ccittFaxStreamGetBlackCode() { + pos = lineSize * (height - 1); + j0 = i * width1; + if (data[pos] !== 0) { + points[j0] = 8; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j0 + j] = data[pos] ? 4 : 8; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j0 + j] = 4; + ++count; + } + if (count > POINT_TO_PROCESS_LIMIT) { + return null; + } - var code, p; - if (this.eoblock) { - code = this.lookBits(13); - if (code === EOF) { - return 1; - } - if ((code >> 7) === 0) { - p = blackTable1[code]; - } else if ((code >> 9) === 0 && (code >> 7) !== 0) { - p = blackTable2[(code >> 1) - 64]; - } else { - p = blackTable3[code >> 7]; - } + // building outlines + var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); + var outlines = []; + for (i = 0; count && i <= height; i++) { + var p = i * width1; + var end = p + width; + while (p < end && !points[p]) { + p++; + } + if (p === end) { + continue; + } + var coords = [p % width1, i]; - if (p[0] > 0) { - this.eatBits(p[0]); - return p[1]; - } - } else { - var result = this.findTableCode(2, 6, blackTable3); - if (result[0]) { - return result[1]; - } + var type = points[p], p0 = p, pp; + do { + var step = steps[type]; + do { + p += step; + } while (!points[p]); - result = this.findTableCode(7, 12, blackTable2, 64); - if (result[0]) { - return result[1]; + pp = points[p]; + if (pp !== 5 && pp !== 10) { + // set new direction + type = pp; + // delete mark + points[p] = 0; + } else { // type is 5 or 10, ie, a crossing + // set new direction + type = pp & ((0x33 * type) >> 4); + // set new type for "future hit" + points[p] &= (type >> 2 | type << 2); } - result = this.findTableCode(10, 13, blackTable1); - if (result[0]) { - return result[1]; - } - } - info('bad black code'); - this.eatBits(1); - return 1; - }; + coords.push(p % width1); + coords.push((p / width1) | 0); + --count; + } while (p0 !== p); + outlines.push(coords); + --i; + } - CCITTFaxStream.prototype.lookBits = function CCITTFaxStream_lookBits(n) { - var c; - while (this.inputBits < n) { - if ((c = this.str.getByte()) === -1) { - if (this.inputBits === 0) { - return EOF; - } - return ((this.inputBuf << (n - this.inputBits)) & - (0xFFFF >> (16 - n))); + var drawOutline = function(c) { + c.save(); + // the path shall be painted in [0..1]x[0..1] space + c.scale(1 / width, -1 / height); + c.translate(0, -height); + c.beginPath(); + for (var i = 0, ii = outlines.length; i < ii; i++) { + var o = outlines[i]; + c.moveTo(o[0], o[1]); + for (var j = 2, jj = o.length; j < jj; j += 2) { + c.lineTo(o[j], o[j+1]); } - this.inputBuf = (this.inputBuf << 8) + c; - this.inputBits += 8; } - return (this.inputBuf >> (this.inputBits - n)) & (0xFFFF >> (16 - n)); + c.fill(); + c.beginPath(); + c.restore(); }; - CCITTFaxStream.prototype.eatBits = function CCITTFaxStream_eatBits(n) { - if ((this.inputBits -= n) < 0) { - this.inputBits = 0; - } - }; + return drawOutline; +} - return CCITTFaxStream; -})(); +var CanvasExtraState = (function CanvasExtraStateClosure() { + function CanvasExtraState(old) { + // Are soft masks and alpha values shapes or opacities? + this.alphaIsShape = false; + this.fontSize = 0; + this.fontSizeScale = 1; + this.textMatrix = IDENTITY_MATRIX; + this.textMatrixScale = 1; + this.fontMatrix = FONT_IDENTITY_MATRIX; + this.leading = 0; + // Current point (in user coordinates) + this.x = 0; + this.y = 0; + // Start of text line (in text coordinates) + this.lineX = 0; + this.lineY = 0; + // Character and word spacing + this.charSpacing = 0; + this.wordSpacing = 0; + this.textHScale = 1; + this.textRenderingMode = TextRenderingMode.FILL; + this.textRise = 0; + // Default fore and background colors + this.fillColor = '#000000'; + this.strokeColor = '#000000'; + this.patternFill = false; + // Note: fill alpha applies to all non-stroking operations + this.fillAlpha = 1; + this.strokeAlpha = 1; + this.lineWidth = 1; + this.activeSMask = null; // nonclonable field (see the save method below) -var LZWStream = (function LZWStreamClosure() { - function LZWStream(str, maybeLength, earlyChange) { - this.str = str; - this.dict = str.dict; - this.cachedData = 0; - this.bitsCached = 0; + this.old = old; + } - var maxLzwDictionarySize = 4096; - var lzwState = { - earlyChange: earlyChange, - codeLength: 9, - nextCode: 258, - dictionaryValues: new Uint8Array(maxLzwDictionarySize), - dictionaryLengths: new Uint16Array(maxLzwDictionarySize), - dictionaryPrevCodes: new Uint16Array(maxLzwDictionarySize), - currentSequence: new Uint8Array(maxLzwDictionarySize), - currentSequenceLength: 0 - }; - for (var i = 0; i < 256; ++i) { - lzwState.dictionaryValues[i] = i; - lzwState.dictionaryLengths[i] = 1; + CanvasExtraState.prototype = { + clone: function CanvasExtraState_clone() { + return Object.create(this); + }, + setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { + this.x = x; + this.y = y; } - this.lzwState = lzwState; + }; + return CanvasExtraState; +})(); + +var CanvasGraphics = (function CanvasGraphicsClosure() { + // Defines the time the executeOperatorList is going to be executing + // before it stops and shedules a continue of execution. + var EXECUTION_TIME = 15; + // Defines the number of steps before checking the execution time + var EXECUTION_STEPS = 10; - DecodeStream.call(this, maybeLength); + function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { + this.ctx = canvasCtx; + this.current = new CanvasExtraState(); + this.stateStack = []; + this.pendingClip = null; + this.pendingEOFill = false; + this.res = null; + this.xobjs = null; + this.commonObjs = commonObjs; + this.objs = objs; + this.imageLayer = imageLayer; + this.groupStack = []; + this.processingType3 = null; + // Patterns are painted relative to the initial page/form transform, see pdf + // spec 8.7.2 NOTE 1. + this.baseTransform = null; + this.baseTransformStack = []; + this.groupLevel = 0; + this.smaskStack = []; + this.smaskCounter = 0; + this.tempSMask = null; + this.cachedCanvases = new CachedCanvases(); + if (canvasCtx) { + // NOTE: if mozCurrentTransform is polyfilled, then the current state of + // the transformation must already be set in canvasCtx._transformMatrix. + addContextCurrentTransform(canvasCtx); + } + this.cachedGetSinglePixelWidth = null; } - LZWStream.prototype = Object.create(DecodeStream.prototype); - - LZWStream.prototype.readBits = function LZWStream_readBits(n) { - var bitsCached = this.bitsCached; - var cachedData = this.cachedData; - while (bitsCached < n) { - var c = this.str.getByte(); - if (c === -1) { - this.eof = true; - return null; - } - cachedData = (cachedData << 8) | c; - bitsCached += 8; + function putBinaryImageData(ctx, imgData) { + if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { + ctx.putImageData(imgData, 0, 0); + return; } - this.bitsCached = (bitsCached -= n); - this.cachedData = cachedData; - this.lastCode = null; - return (cachedData >>> bitsCached) & ((1 << n) - 1); - }; - LZWStream.prototype.readBlock = function LZWStream_readBlock() { - var blockSize = 512; - var estimatedDecodedSize = blockSize * 2, decodedSizeDelta = blockSize; - var i, j, q; + // Put the image data to the canvas in chunks, rather than putting the + // whole image at once. This saves JS memory, because the ImageData object + // is smaller. It also possibly saves C++ memory within the implementation + // of putImageData(). (E.g. in Firefox we make two short-lived copies of + // the data passed to putImageData()). |n| shouldn't be too small, however, + // because too many putImageData() calls will slow things down. + // + // Note: as written, if the last chunk is partial, the putImageData() call + // will (conceptually) put pixels past the bounds of the canvas. But + // that's ok; any such pixels are ignored. - var lzwState = this.lzwState; - if (!lzwState) { - return; // eof was found - } + var height = imgData.height, width = imgData.width; + var partialChunkHeight = height % FULL_CHUNK_HEIGHT; + var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; + var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; - var earlyChange = lzwState.earlyChange; - var nextCode = lzwState.nextCode; - var dictionaryValues = lzwState.dictionaryValues; - var dictionaryLengths = lzwState.dictionaryLengths; - var dictionaryPrevCodes = lzwState.dictionaryPrevCodes; - var codeLength = lzwState.codeLength; - var prevCode = lzwState.prevCode; - var currentSequence = lzwState.currentSequence; - var currentSequenceLength = lzwState.currentSequenceLength; + var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); + var srcPos = 0, destPos; + var src = imgData.data; + var dest = chunkImgData.data; + var i, j, thisChunkHeight, elemsInThisChunk; - var decodedLength = 0; - var currentBufferLength = this.bufferLength; - var buffer = this.ensureBuffer(this.bufferLength + estimatedDecodedSize); + // There are multiple forms in which the pixel data can be passed, and + // imgData.kind tells us which one this is. + if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { + // Grayscale, 1 bit per pixel (i.e. black-and-white). + var srcLength = src.byteLength; + var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : + new Uint32ArrayView(dest); + var dest32DataLength = dest32.length; + var fullSrcDiff = (width + 7) >> 3; + var white = 0xFFFFFFFF; + var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? + 0xFF000000 : 0x000000FF; + for (i = 0; i < totalChunks; i++) { + thisChunkHeight = + (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; + destPos = 0; + for (j = 0; j < thisChunkHeight; j++) { + var srcDiff = srcLength - srcPos; + var k = 0; + var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; + var kEndUnrolled = kEnd & ~7; + var mask = 0; + var srcByte = 0; + for (; k < kEndUnrolled; k += 8) { + srcByte = src[srcPos++]; + dest32[destPos++] = (srcByte & 128) ? white : black; + dest32[destPos++] = (srcByte & 64) ? white : black; + dest32[destPos++] = (srcByte & 32) ? white : black; + dest32[destPos++] = (srcByte & 16) ? white : black; + dest32[destPos++] = (srcByte & 8) ? white : black; + dest32[destPos++] = (srcByte & 4) ? white : black; + dest32[destPos++] = (srcByte & 2) ? white : black; + dest32[destPos++] = (srcByte & 1) ? white : black; + } + for (; k < kEnd; k++) { + if (mask === 0) { + srcByte = src[srcPos++]; + mask = 128; + } - for (i = 0; i < blockSize; i++) { - var code = this.readBits(codeLength); - var hasPrev = currentSequenceLength > 0; - if (code < 256) { - currentSequence[0] = code; - currentSequenceLength = 1; - } else if (code >= 258) { - if (code < nextCode) { - currentSequenceLength = dictionaryLengths[code]; - for (j = currentSequenceLength - 1, q = code; j >= 0; j--) { - currentSequence[j] = dictionaryValues[q]; - q = dictionaryPrevCodes[q]; + dest32[destPos++] = (srcByte & mask) ? white : black; + mask >>= 1; } - } else { - currentSequence[currentSequenceLength++] = currentSequence[0]; } - } else if (code === 256) { - codeLength = 9; - nextCode = 258; - currentSequenceLength = 0; - continue; - } else { - this.eof = true; - delete this.lzwState; - break; - } + // We ran out of input. Make all remaining pixels transparent. + while (destPos < dest32DataLength) { + dest32[destPos++] = 0; + } - if (hasPrev) { - dictionaryPrevCodes[nextCode] = prevCode; - dictionaryLengths[nextCode] = dictionaryLengths[prevCode] + 1; - dictionaryValues[nextCode] = currentSequence[0]; - nextCode++; - codeLength = (nextCode + earlyChange) & (nextCode + earlyChange - 1) ? - codeLength : Math.min(Math.log(nextCode + earlyChange) / - 0.6931471805599453 + 1, 12) | 0; + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); } - prevCode = code; + } else if (imgData.kind === ImageKind.RGBA_32BPP) { + // RGBA, 32-bits per pixel. - decodedLength += currentSequenceLength; - if (estimatedDecodedSize < decodedLength) { - do { - estimatedDecodedSize += decodedSizeDelta; - } while (estimatedDecodedSize < decodedLength); - buffer = this.ensureBuffer(this.bufferLength + estimatedDecodedSize); + j = 0; + elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4; + for (i = 0; i < fullChunks; i++) { + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + srcPos += elemsInThisChunk; + + ctx.putImageData(chunkImgData, 0, j); + j += FULL_CHUNK_HEIGHT; } - for (j = 0; j < currentSequenceLength; j++) { - buffer[currentBufferLength++] = currentSequence[j]; + if (i < totalChunks) { + elemsInThisChunk = width * partialChunkHeight * 4; + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + ctx.putImageData(chunkImgData, 0, j); } - } - lzwState.nextCode = nextCode; - lzwState.codeLength = codeLength; - lzwState.prevCode = prevCode; - lzwState.currentSequenceLength = currentSequenceLength; - - this.bufferLength = currentBufferLength; - }; - return LZWStream; -})(); + } else if (imgData.kind === ImageKind.RGB_24BPP) { + // RGB, 24-bits per pixel. + thisChunkHeight = FULL_CHUNK_HEIGHT; + elemsInThisChunk = width * thisChunkHeight; + for (i = 0; i < totalChunks; i++) { + if (i >= fullChunks) { + thisChunkHeight = partialChunkHeight; + elemsInThisChunk = width * thisChunkHeight; + } -var NullStream = (function NullStreamClosure() { - function NullStream() { - Stream.call(this, new Uint8Array(0)); + destPos = 0; + for (j = elemsInThisChunk; j--;) { + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = 255; + } + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); + } + } else { + error('bad image kind: ' + imgData.kind); + } } - NullStream.prototype = Stream.prototype; - - return NullStream; -})(); - -// TODO refactor to remove dependency on parser.js -function _setCoreParser(coreParser_) { - coreParser = coreParser_; - EOF = coreParser_.EOF; - Lexer = coreParser_.Lexer; -} -exports._setCoreParser = _setCoreParser; - -// TODO refactor to remove dependency on colorspace.js -function _setCoreColorSpace(coreColorSpace_) { - coreColorSpace = coreColorSpace_; - ColorSpace = coreColorSpace_.ColorSpace; -} -exports._setCoreColorSpace = _setCoreColorSpace; + function putBinaryImageMask(ctx, imgData) { + var height = imgData.height, width = imgData.width; + var partialChunkHeight = height % FULL_CHUNK_HEIGHT; + var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; + var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; -exports.Ascii85Stream = Ascii85Stream; -exports.AsciiHexStream = AsciiHexStream; -exports.CCITTFaxStream = CCITTFaxStream; -exports.DecryptStream = DecryptStream; -exports.DecodeStream = DecodeStream; -exports.FlateStream = FlateStream; -exports.Jbig2Stream = Jbig2Stream; -exports.JpegStream = JpegStream; -exports.JpxStream = JpxStream; -exports.NullStream = NullStream; -exports.PredictorStream = PredictorStream; -exports.RunLengthStream = RunLengthStream; -exports.Stream = Stream; -exports.StreamsSequenceStream = StreamsSequenceStream; -exports.StringStream = StringStream; -exports.LZWStream = LZWStream; -})); + var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); + var srcPos = 0; + var src = imgData.data; + var dest = chunkImgData.data; + for (var i = 0; i < totalChunks; i++) { + var thisChunkHeight = + (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; -(function (root, factory) { - { - factory((root.pdfjsCoreCrypto = {}), root.pdfjsSharedUtil, - root.pdfjsCorePrimitives, root.pdfjsCoreStream); + // Expand the mask so it can be used by the canvas. Any required + // inversion has already been handled. + var destPos = 3; // alpha component offset + for (var j = 0; j < thisChunkHeight; j++) { + var mask = 0; + for (var k = 0; k < width; k++) { + if (!mask) { + var elem = src[srcPos++]; + mask = 128; + } + dest[destPos] = (elem & mask) ? 0 : 255; + destPos += 4; + mask >>= 1; + } + } + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); + } } -}(this, function (exports, sharedUtil, corePrimitives, coreStream) { - -var PasswordException = sharedUtil.PasswordException; -var PasswordResponses = sharedUtil.PasswordResponses; -var bytesToString = sharedUtil.bytesToString; -var error = sharedUtil.error; -var isInt = sharedUtil.isInt; -var stringToBytes = sharedUtil.stringToBytes; -var utf8StringToString = sharedUtil.utf8StringToString; -var warn = sharedUtil.warn; -var Name = corePrimitives.Name; -var isName = corePrimitives.isName; -var isDict = corePrimitives.isDict; -var DecryptStream = coreStream.DecryptStream; -var ARCFourCipher = (function ARCFourCipherClosure() { - function ARCFourCipher(key) { - this.a = 0; - this.b = 0; - var s = new Uint8Array(256); - var i, j = 0, tmp, keyLength = key.length; - for (i = 0; i < 256; ++i) { - s[i] = i; + function copyCtxState(sourceCtx, destCtx) { + var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', + 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', + 'globalCompositeOperation', 'font']; + for (var i = 0, ii = properties.length; i < ii; i++) { + var property = properties[i]; + if (sourceCtx[property] !== undefined) { + destCtx[property] = sourceCtx[property]; + } } - for (i = 0; i < 256; ++i) { - tmp = s[i]; - j = (j + tmp + key[i % keyLength]) & 0xFF; - s[i] = s[j]; - s[j] = tmp; + if (sourceCtx.setLineDash !== undefined) { + destCtx.setLineDash(sourceCtx.getLineDash()); + destCtx.lineDashOffset = sourceCtx.lineDashOffset; + } else if (sourceCtx.mozDashOffset !== undefined) { + destCtx.mozDash = sourceCtx.mozDash; + destCtx.mozDashOffset = sourceCtx.mozDashOffset; } - this.s = s; } - ARCFourCipher.prototype = { - encryptBlock: function ARCFourCipher_encryptBlock(data) { - var i, n = data.length, tmp, tmp2; - var a = this.a, b = this.b, s = this.s; - var output = new Uint8Array(n); - for (i = 0; i < n; ++i) { - a = (a + 1) & 0xFF; - tmp = s[a]; - b = (b + tmp) & 0xFF; - tmp2 = s[b]; - s[a] = tmp2; - s[b] = tmp; - output[i] = data[i] ^ s[(tmp + tmp2) & 0xFF]; + function composeSMaskBackdrop(bytes, r0, g0, b0) { + var length = bytes.length; + for (var i = 3; i < length; i += 4) { + var alpha = bytes[i]; + if (alpha === 0) { + bytes[i - 3] = r0; + bytes[i - 2] = g0; + bytes[i - 1] = b0; + } else if (alpha < 255) { + var alpha_ = 255 - alpha; + bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; + bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; + bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; } - this.a = a; - this.b = b; - return output; } - }; - ARCFourCipher.prototype.decryptBlock = ARCFourCipher.prototype.encryptBlock; + } - return ARCFourCipher; -})(); + function composeSMaskAlpha(maskData, layerData, transferMap) { + var length = maskData.length; + var scale = 1 / 255; + for (var i = 3; i < length; i += 4) { + var alpha = transferMap ? transferMap[maskData[i]] : maskData[i]; + layerData[i] = (layerData[i] * alpha * scale) | 0; + } + } -var calculateMD5 = (function calculateMD5Closure() { - var r = new Uint8Array([ - 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, - 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, - 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, - 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21]); + function composeSMaskLuminosity(maskData, layerData, transferMap) { + var length = maskData.length; + for (var i = 3; i < length; i += 4) { + var y = (maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 + (maskData[i - 2] * 152) + // * 0.59 .... + (maskData[i - 1] * 28); // * 0.11 .... + layerData[i] = transferMap ? + (layerData[i] * transferMap[y >> 8]) >> 8 : + (layerData[i] * y) >> 16; + } + } - var k = new Int32Array([ - -680876936, -389564586, 606105819, -1044525330, -176418897, 1200080426, - -1473231341, -45705983, 1770035416, -1958414417, -42063, -1990404162, - 1804603682, -40341101, -1502002290, 1236535329, -165796510, -1069501632, - 643717713, -373897302, -701558691, 38016083, -660478335, -405537848, - 568446438, -1019803690, -187363961, 1163531501, -1444681467, -51403784, - 1735328473, -1926607734, -378558, -2022574463, 1839030562, -35309556, - -1530992060, 1272893353, -155497632, -1094730640, 681279174, -358537222, - -722521979, 76029189, -640364487, -421815835, 530742520, -995338651, - -198630844, 1126891415, -1416354905, -57434055, 1700485571, -1894986606, - -1051523, -2054922799, 1873313359, -30611744, -1560198380, 1309151649, - -145523070, -1120210379, 718787259, -343485551]); + function genericComposeSMask(maskCtx, layerCtx, width, height, + subtype, backdrop, transferMap) { + var hasBackdrop = !!backdrop; + var r0 = hasBackdrop ? backdrop[0] : 0; + var g0 = hasBackdrop ? backdrop[1] : 0; + var b0 = hasBackdrop ? backdrop[2] : 0; - function hash(data, offset, length) { - var h0 = 1732584193, h1 = -271733879, h2 = -1732584194, h3 = 271733878; - // pre-processing - var paddedLength = (length + 72) & ~63; // data + 9 extra bytes - var padded = new Uint8Array(paddedLength); - var i, j, n; - for (i = 0; i < length; ++i) { - padded[i] = data[offset++]; - } - padded[i++] = 0x80; - n = paddedLength - 8; - while (i < n) { - padded[i++] = 0; + var composeFn; + if (subtype === 'Luminosity') { + composeFn = composeSMaskLuminosity; + } else { + composeFn = composeSMaskAlpha; } - padded[i++] = (length << 3) & 0xFF; - padded[i++] = (length >> 5) & 0xFF; - padded[i++] = (length >> 13) & 0xFF; - padded[i++] = (length >> 21) & 0xFF; - padded[i++] = (length >>> 29) & 0xFF; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - var w = new Int32Array(16); - for (i = 0; i < paddedLength;) { - for (j = 0; j < 16; ++j, i += 4) { - w[j] = (padded[i] | (padded[i + 1] << 8) | - (padded[i + 2] << 16) | (padded[i + 3] << 24)); - } - var a = h0, b = h1, c = h2, d = h3, f, g; - for (j = 0; j < 64; ++j) { - if (j < 16) { - f = (b & c) | ((~b) & d); - g = j; - } else if (j < 32) { - f = (d & b) | ((~d) & c); - g = (5 * j + 1) & 15; - } else if (j < 48) { - f = b ^ c ^ d; - g = (3 * j + 5) & 15; - } else { - f = c ^ (b | (~d)); - g = (7 * j) & 15; - } - var tmp = d, rotateArg = (a + f + k[j] + w[g]) | 0, rotate = r[j]; - d = c; - c = b; - b = (b + ((rotateArg << rotate) | (rotateArg >>> (32 - rotate)))) | 0; - a = tmp; + + // processing image in chunks to save memory + var PIXELS_TO_PROCESS = 1048576; + var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); + for (var row = 0; row < height; row += chunkSize) { + var chunkHeight = Math.min(chunkSize, height - row); + var maskData = maskCtx.getImageData(0, row, width, chunkHeight); + var layerData = layerCtx.getImageData(0, row, width, chunkHeight); + + if (hasBackdrop) { + composeSMaskBackdrop(maskData.data, r0, g0, b0); } - h0 = (h0 + a) | 0; - h1 = (h1 + b) | 0; - h2 = (h2 + c) | 0; - h3 = (h3 + d) | 0; + composeFn(maskData.data, layerData.data, transferMap); + + maskCtx.putImageData(layerData, 0, row); } - return new Uint8Array([ - h0 & 0xFF, (h0 >> 8) & 0xFF, (h0 >> 16) & 0xFF, (h0 >>> 24) & 0xFF, - h1 & 0xFF, (h1 >> 8) & 0xFF, (h1 >> 16) & 0xFF, (h1 >>> 24) & 0xFF, - h2 & 0xFF, (h2 >> 8) & 0xFF, (h2 >> 16) & 0xFF, (h2 >>> 24) & 0xFF, - h3 & 0xFF, (h3 >> 8) & 0xFF, (h3 >> 16) & 0xFF, (h3 >>> 24) & 0xFF - ]); } - return hash; -})(); -var Word64 = (function Word64Closure() { - function Word64(highInteger, lowInteger) { - this.high = highInteger | 0; - this.low = lowInteger | 0; + function composeSMask(ctx, smask, layerCtx) { + var mask = smask.canvas; + var maskCtx = smask.context; + + ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, + smask.offsetX, smask.offsetY); + + var backdrop = smask.backdrop || null; + if (!smask.transferMap && WebGLUtils.isEnabled) { + var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, + {subtype: smask.subtype, backdrop: backdrop}); + ctx.setTransform(1, 0, 0, 1, 0, 0); + ctx.drawImage(composed, smask.offsetX, smask.offsetY); + return; + } + genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, + smask.subtype, backdrop, smask.transferMap); + ctx.drawImage(mask, 0, 0); } - Word64.prototype = { - and: function Word64_and(word) { - this.high &= word.high; - this.low &= word.low; - }, - xor: function Word64_xor(word) { - this.high ^= word.high; - this.low ^= word.low; - }, - or: function Word64_or(word) { - this.high |= word.high; - this.low |= word.low; - }, + var LINE_CAP_STYLES = ['butt', 'round', 'square']; + var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; + var NORMAL_CLIP = {}; + var EO_CLIP = {}; - shiftRight: function Word64_shiftRight(places) { - if (places >= 32) { - this.low = (this.high >>> (places - 32)) | 0; - this.high = 0; - } else { - this.low = (this.low >>> places) | (this.high << (32 - places)); - this.high = (this.high >>> places) | 0; - } - }, + CanvasGraphics.prototype = { - shiftLeft: function Word64_shiftLeft(places) { - if (places >= 32) { - this.high = this.low << (places - 32); - this.low = 0; - } else { - this.high = (this.high << places) | (this.low >>> (32 - places)); - this.low = this.low << places; + beginDrawing: function CanvasGraphics_beginDrawing(transform, viewport, + transparency) { + // For pdfs that use blend modes we have to clear the canvas else certain + // blend modes can look wrong since we'd be blending with a white + // backdrop. The problem with a transparent backdrop though is we then + // don't get sub pixel anti aliasing on text, creating temporary + // transparent canvas when we have blend modes. + var width = this.ctx.canvas.width; + var height = this.ctx.canvas.height; + + this.ctx.save(); + this.ctx.fillStyle = 'rgb(255, 255, 255)'; + this.ctx.fillRect(0, 0, width, height); + this.ctx.restore(); + + if (transparency) { + var transparentCanvas = this.cachedCanvases.getCanvas( + 'transparent', width, height, true); + this.compositeCtx = this.ctx; + this.transparentCanvas = transparentCanvas.canvas; + this.ctx = transparentCanvas.context; + this.ctx.save(); + // The transform can be applied before rendering, transferring it to + // the new canvas. + this.ctx.transform.apply(this.ctx, + this.compositeCtx.mozCurrentTransform); } - }, - rotateRight: function Word64_rotateRight(places) { - var low, high; - if (places & 32) { - high = this.low; - low = this.high; - } else { - low = this.low; - high = this.high; + this.ctx.save(); + if (transform) { + this.ctx.transform.apply(this.ctx, transform); } - places &= 31; - this.low = (low >>> places) | (high << (32 - places)); - this.high = (high >>> places) | (low << (32 - places)); - }, + this.ctx.transform.apply(this.ctx, viewport.transform); - not: function Word64_not() { - this.high = ~this.high; - this.low = ~this.low; - }, + this.baseTransform = this.ctx.mozCurrentTransform.slice(); - add: function Word64_add(word) { - var lowAdd = (this.low >>> 0) + (word.low >>> 0); - var highAdd = (this.high >>> 0) + (word.high >>> 0); - if (lowAdd > 0xFFFFFFFF) { - highAdd += 1; + if (this.imageLayer) { + this.imageLayer.beginLayout(); } - this.low = lowAdd | 0; - this.high = highAdd | 0; }, - copyTo: function Word64_copyTo(bytes, offset) { - bytes[offset] = (this.high >>> 24) & 0xFF; - bytes[offset + 1] = (this.high >> 16) & 0xFF; - bytes[offset + 2] = (this.high >> 8) & 0xFF; - bytes[offset + 3] = this.high & 0xFF; - bytes[offset + 4] = (this.low >>> 24) & 0xFF; - bytes[offset + 5] = (this.low >> 16) & 0xFF; - bytes[offset + 6] = (this.low >> 8) & 0xFF; - bytes[offset + 7] = this.low & 0xFF; - }, + executeOperatorList: function CanvasGraphics_executeOperatorList( + operatorList, + executionStartIdx, continueCallback, + stepper) { + var argsArray = operatorList.argsArray; + var fnArray = operatorList.fnArray; + var i = executionStartIdx || 0; + var argsArrayLen = argsArray.length; - assign: function Word64_assign(word) { - this.high = word.high; - this.low = word.low; - } - }; - return Word64; -})(); + // Sometimes the OperatorList to execute is empty. + if (argsArrayLen === i) { + return i; + } -var calculateSHA256 = (function calculateSHA256Closure() { - function rotr(x, n) { - return (x >>> n) | (x << 32 - n); - } + var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && + typeof continueCallback === 'function'); + var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; + var steps = 0; - function ch(x, y, z) { - return (x & y) ^ (~x & z); - } + var commonObjs = this.commonObjs; + var objs = this.objs; + var fnId; - function maj(x, y, z) { - return (x & y) ^ (x & z) ^ (y & z); - } + while (true) { + if (stepper !== undefined && i === stepper.nextBreakPoint) { + stepper.breakIt(i, continueCallback); + return i; + } - function sigma(x) { - return rotr(x, 2) ^ rotr(x, 13) ^ rotr(x, 22); - } + fnId = fnArray[i]; - function sigmaPrime(x) { - return rotr(x, 6) ^ rotr(x, 11) ^ rotr(x, 25); - } + if (fnId !== OPS.dependency) { + this[fnId].apply(this, argsArray[i]); + } else { + var deps = argsArray[i]; + for (var n = 0, nn = deps.length; n < nn; n++) { + var depObjId = deps[n]; + var common = depObjId[0] === 'g' && depObjId[1] === '_'; + var objsPool = common ? commonObjs : objs; - function littleSigma(x) { - return rotr(x, 7) ^ rotr(x, 18) ^ x >>> 3; - } + // If the promise isn't resolved yet, add the continueCallback + // to the promise and bail out. + if (!objsPool.isResolved(depObjId)) { + objsPool.get(depObjId, continueCallback); + return i; + } + } + } - function littleSigmaPrime(x) { - return rotr(x, 17) ^ rotr(x, 19) ^ x >>> 10; - } + i++; - var k = [0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, - 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, - 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, - 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, - 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, - 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, - 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, - 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, - 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, - 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, - 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, - 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, - 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, - 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, - 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, - 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2]; + // If the entire operatorList was executed, stop as were done. + if (i === argsArrayLen) { + return i; + } - function hash(data, offset, length) { - // initial hash values - var h0 = 0x6a09e667, h1 = 0xbb67ae85, h2 = 0x3c6ef372, - h3 = 0xa54ff53a, h4 = 0x510e527f, h5 = 0x9b05688c, - h6 = 0x1f83d9ab, h7 = 0x5be0cd19; - // pre-processing - var paddedLength = Math.ceil((length + 9) / 64) * 64; - var padded = new Uint8Array(paddedLength); - var i, j, n; - for (i = 0; i < length; ++i) { - padded[i] = data[offset++]; - } - padded[i++] = 0x80; - n = paddedLength - 8; - while (i < n) { - padded[i++] = 0; - } - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = (length >>> 29) & 0xFF; - padded[i++] = (length >> 21) & 0xFF; - padded[i++] = (length >> 13) & 0xFF; - padded[i++] = (length >> 5) & 0xFF; - padded[i++] = (length << 3) & 0xFF; - var w = new Uint32Array(64); - // for each 512 bit block - for (i = 0; i < paddedLength;) { - for (j = 0; j < 16; ++j) { - w[j] = (padded[i] << 24 | (padded[i + 1] << 16) | - (padded[i + 2] << 8) | (padded[i + 3])); - i += 4; - } + // If the execution took longer then a certain amount of time and + // `continueCallback` is specified, interrupt the execution. + if (chunkOperations && ++steps > EXECUTION_STEPS) { + if (Date.now() > endTime) { + continueCallback(); + return i; + } + steps = 0; + } - for (j = 16; j < 64; ++j) { - w[j] = littleSigmaPrime(w[j - 2]) + w[j - 7] + - littleSigma(w[j - 15]) + w[j - 16] | 0; - } - var a = h0, b = h1, c = h2, d = h3, e = h4, - f = h5, g = h6, h = h7, t1, t2; - for (j = 0; j < 64; ++j) { - t1 = h + sigmaPrime(e) + ch(e, f, g) + k[j] + w[j]; - t2 = sigma(a) + maj(a, b, c); - h = g; - g = f; - f = e; - e = (d + t1) | 0; - d = c; - c = b; - b = a; - a = (t1 + t2) | 0; + // If the operatorList isn't executed completely yet OR the execution + // time was short enough, do another execution round. } - h0 = (h0 + a) | 0; - h1 = (h1 + b) | 0; - h2 = (h2 + c) | 0; - h3 = (h3 + d) | 0; - h4 = (h4 + e) | 0; - h5 = (h5 + f) | 0; - h6 = (h6 + g) | 0; - h7 = (h7 + h) | 0; - } - return new Uint8Array([ - (h0 >> 24) & 0xFF, (h0 >> 16) & 0xFF, (h0 >> 8) & 0xFF, (h0) & 0xFF, - (h1 >> 24) & 0xFF, (h1 >> 16) & 0xFF, (h1 >> 8) & 0xFF, (h1) & 0xFF, - (h2 >> 24) & 0xFF, (h2 >> 16) & 0xFF, (h2 >> 8) & 0xFF, (h2) & 0xFF, - (h3 >> 24) & 0xFF, (h3 >> 16) & 0xFF, (h3 >> 8) & 0xFF, (h3) & 0xFF, - (h4 >> 24) & 0xFF, (h4 >> 16) & 0xFF, (h4 >> 8) & 0xFF, (h4) & 0xFF, - (h5 >> 24) & 0xFF, (h5 >> 16) & 0xFF, (h5 >> 8) & 0xFF, (h5) & 0xFF, - (h6 >> 24) & 0xFF, (h6 >> 16) & 0xFF, (h6 >> 8) & 0xFF, (h6) & 0xFF, - (h7 >> 24) & 0xFF, (h7 >> 16) & 0xFF, (h7 >> 8) & 0xFF, (h7) & 0xFF - ]); - } - - return hash; -})(); - -var calculateSHA512 = (function calculateSHA512Closure() { - function ch(result, x, y, z, tmp) { - result.assign(x); - result.and(y); - tmp.assign(x); - tmp.not(); - tmp.and(z); - result.xor(tmp); - } - - function maj(result, x, y, z, tmp) { - result.assign(x); - result.and(y); - tmp.assign(x); - tmp.and(z); - result.xor(tmp); - tmp.assign(y); - tmp.and(z); - result.xor(tmp); - } + }, - function sigma(result, x, tmp) { - result.assign(x); - result.rotateRight(28); - tmp.assign(x); - tmp.rotateRight(34); - result.xor(tmp); - tmp.assign(x); - tmp.rotateRight(39); - result.xor(tmp); - } + endDrawing: function CanvasGraphics_endDrawing() { + this.ctx.restore(); - function sigmaPrime(result, x, tmp) { - result.assign(x); - result.rotateRight(14); - tmp.assign(x); - tmp.rotateRight(18); - result.xor(tmp); - tmp.assign(x); - tmp.rotateRight(41); - result.xor(tmp); - } + if (this.transparentCanvas) { + this.ctx = this.compositeCtx; + this.ctx.drawImage(this.transparentCanvas, 0, 0); + this.transparentCanvas = null; + } - function littleSigma(result, x, tmp) { - result.assign(x); - result.rotateRight(1); - tmp.assign(x); - tmp.rotateRight(8); - result.xor(tmp); - tmp.assign(x); - tmp.shiftRight(7); - result.xor(tmp); - } + this.cachedCanvases.clear(); + WebGLUtils.clear(); - function littleSigmaPrime(result, x, tmp) { - result.assign(x); - result.rotateRight(19); - tmp.assign(x); - tmp.rotateRight(61); - result.xor(tmp); - tmp.assign(x); - tmp.shiftRight(6); - result.xor(tmp); - } + if (this.imageLayer) { + this.imageLayer.endLayout(); + } + }, - var k = [ - new Word64(0x428a2f98, 0xd728ae22), new Word64(0x71374491, 0x23ef65cd), - new Word64(0xb5c0fbcf, 0xec4d3b2f), new Word64(0xe9b5dba5, 0x8189dbbc), - new Word64(0x3956c25b, 0xf348b538), new Word64(0x59f111f1, 0xb605d019), - new Word64(0x923f82a4, 0xaf194f9b), new Word64(0xab1c5ed5, 0xda6d8118), - new Word64(0xd807aa98, 0xa3030242), new Word64(0x12835b01, 0x45706fbe), - new Word64(0x243185be, 0x4ee4b28c), new Word64(0x550c7dc3, 0xd5ffb4e2), - new Word64(0x72be5d74, 0xf27b896f), new Word64(0x80deb1fe, 0x3b1696b1), - new Word64(0x9bdc06a7, 0x25c71235), new Word64(0xc19bf174, 0xcf692694), - new Word64(0xe49b69c1, 0x9ef14ad2), new Word64(0xefbe4786, 0x384f25e3), - new Word64(0x0fc19dc6, 0x8b8cd5b5), new Word64(0x240ca1cc, 0x77ac9c65), - new Word64(0x2de92c6f, 0x592b0275), new Word64(0x4a7484aa, 0x6ea6e483), - new Word64(0x5cb0a9dc, 0xbd41fbd4), new Word64(0x76f988da, 0x831153b5), - new Word64(0x983e5152, 0xee66dfab), new Word64(0xa831c66d, 0x2db43210), - new Word64(0xb00327c8, 0x98fb213f), new Word64(0xbf597fc7, 0xbeef0ee4), - new Word64(0xc6e00bf3, 0x3da88fc2), new Word64(0xd5a79147, 0x930aa725), - new Word64(0x06ca6351, 0xe003826f), new Word64(0x14292967, 0x0a0e6e70), - new Word64(0x27b70a85, 0x46d22ffc), new Word64(0x2e1b2138, 0x5c26c926), - new Word64(0x4d2c6dfc, 0x5ac42aed), new Word64(0x53380d13, 0x9d95b3df), - new Word64(0x650a7354, 0x8baf63de), new Word64(0x766a0abb, 0x3c77b2a8), - new Word64(0x81c2c92e, 0x47edaee6), new Word64(0x92722c85, 0x1482353b), - new Word64(0xa2bfe8a1, 0x4cf10364), new Word64(0xa81a664b, 0xbc423001), - new Word64(0xc24b8b70, 0xd0f89791), new Word64(0xc76c51a3, 0x0654be30), - new Word64(0xd192e819, 0xd6ef5218), new Word64(0xd6990624, 0x5565a910), - new Word64(0xf40e3585, 0x5771202a), new Word64(0x106aa070, 0x32bbd1b8), - new Word64(0x19a4c116, 0xb8d2d0c8), new Word64(0x1e376c08, 0x5141ab53), - new Word64(0x2748774c, 0xdf8eeb99), new Word64(0x34b0bcb5, 0xe19b48a8), - new Word64(0x391c0cb3, 0xc5c95a63), new Word64(0x4ed8aa4a, 0xe3418acb), - new Word64(0x5b9cca4f, 0x7763e373), new Word64(0x682e6ff3, 0xd6b2b8a3), - new Word64(0x748f82ee, 0x5defb2fc), new Word64(0x78a5636f, 0x43172f60), - new Word64(0x84c87814, 0xa1f0ab72), new Word64(0x8cc70208, 0x1a6439ec), - new Word64(0x90befffa, 0x23631e28), new Word64(0xa4506ceb, 0xde82bde9), - new Word64(0xbef9a3f7, 0xb2c67915), new Word64(0xc67178f2, 0xe372532b), - new Word64(0xca273ece, 0xea26619c), new Word64(0xd186b8c7, 0x21c0c207), - new Word64(0xeada7dd6, 0xcde0eb1e), new Word64(0xf57d4f7f, 0xee6ed178), - new Word64(0x06f067aa, 0x72176fba), new Word64(0x0a637dc5, 0xa2c898a6), - new Word64(0x113f9804, 0xbef90dae), new Word64(0x1b710b35, 0x131c471b), - new Word64(0x28db77f5, 0x23047d84), new Word64(0x32caab7b, 0x40c72493), - new Word64(0x3c9ebe0a, 0x15c9bebc), new Word64(0x431d67c4, 0x9c100d4c), - new Word64(0x4cc5d4be, 0xcb3e42b6), new Word64(0x597f299c, 0xfc657e2a), - new Word64(0x5fcb6fab, 0x3ad6faec), new Word64(0x6c44198c, 0x4a475817)]; + // Graphics state + setLineWidth: function CanvasGraphics_setLineWidth(width) { + this.current.lineWidth = width; + this.ctx.lineWidth = width; + }, + setLineCap: function CanvasGraphics_setLineCap(style) { + this.ctx.lineCap = LINE_CAP_STYLES[style]; + }, + setLineJoin: function CanvasGraphics_setLineJoin(style) { + this.ctx.lineJoin = LINE_JOIN_STYLES[style]; + }, + setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { + this.ctx.miterLimit = limit; + }, + setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { + var ctx = this.ctx; + if (ctx.setLineDash !== undefined) { + ctx.setLineDash(dashArray); + ctx.lineDashOffset = dashPhase; + } else { + ctx.mozDash = dashArray; + ctx.mozDashOffset = dashPhase; + } + }, + setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { + // Maybe if we one day fully support color spaces this will be important + // for now we can ignore. + // TODO set rendering intent? + }, + setFlatness: function CanvasGraphics_setFlatness(flatness) { + // There's no way to control this with canvas, but we can safely ignore. + // TODO set flatness? + }, + setGState: function CanvasGraphics_setGState(states) { + for (var i = 0, ii = states.length; i < ii; i++) { + var state = states[i]; + var key = state[0]; + var value = state[1]; - function hash(data, offset, length, mode384) { - mode384 = !!mode384; - // initial hash values - var h0, h1, h2, h3, h4, h5, h6, h7; - if (!mode384) { - h0 = new Word64(0x6a09e667, 0xf3bcc908); - h1 = new Word64(0xbb67ae85, 0x84caa73b); - h2 = new Word64(0x3c6ef372, 0xfe94f82b); - h3 = new Word64(0xa54ff53a, 0x5f1d36f1); - h4 = new Word64(0x510e527f, 0xade682d1); - h5 = new Word64(0x9b05688c, 0x2b3e6c1f); - h6 = new Word64(0x1f83d9ab, 0xfb41bd6b); - h7 = new Word64(0x5be0cd19, 0x137e2179); - } - else { - // SHA384 is exactly the same - // except with different starting values and a trimmed result - h0 = new Word64(0xcbbb9d5d, 0xc1059ed8); - h1 = new Word64(0x629a292a, 0x367cd507); - h2 = new Word64(0x9159015a, 0x3070dd17); - h3 = new Word64(0x152fecd8, 0xf70e5939); - h4 = new Word64(0x67332667, 0xffc00b31); - h5 = new Word64(0x8eb44a87, 0x68581511); - h6 = new Word64(0xdb0c2e0d, 0x64f98fa7); - h7 = new Word64(0x47b5481d, 0xbefa4fa4); - } + switch (key) { + case 'LW': + this.setLineWidth(value); + break; + case 'LC': + this.setLineCap(value); + break; + case 'LJ': + this.setLineJoin(value); + break; + case 'ML': + this.setMiterLimit(value); + break; + case 'D': + this.setDash(value[0], value[1]); + break; + case 'RI': + this.setRenderingIntent(value); + break; + case 'FL': + this.setFlatness(value); + break; + case 'Font': + this.setFont(value[0], value[1]); + break; + case 'CA': + this.current.strokeAlpha = state[1]; + break; + case 'ca': + this.current.fillAlpha = state[1]; + this.ctx.globalAlpha = state[1]; + break; + case 'BM': + if (value && value.name && (value.name !== 'Normal')) { + var mode = value.name.replace(/([A-Z])/g, + function(c) { + return '-' + c.toLowerCase(); + } + ).substring(1); + this.ctx.globalCompositeOperation = mode; + if (this.ctx.globalCompositeOperation !== mode) { + warn('globalCompositeOperation "' + mode + + '" is not supported'); + } + } else { + this.ctx.globalCompositeOperation = 'source-over'; + } + break; + case 'SMask': + if (this.current.activeSMask) { + this.endSMaskGroup(); + } + this.current.activeSMask = value ? this.tempSMask : null; + if (this.current.activeSMask) { + this.beginSMaskGroup(); + } + this.tempSMask = null; + break; + } + } + }, + beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { - // pre-processing - var paddedLength = Math.ceil((length + 17) / 128) * 128; - var padded = new Uint8Array(paddedLength); - var i, j, n; - for (i = 0; i < length; ++i) { - padded[i] = data[offset++]; - } - padded[i++] = 0x80; - n = paddedLength - 16; - while (i < n) { - padded[i++] = 0; - } - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = 0; - padded[i++] = (length >>> 29) & 0xFF; - padded[i++] = (length >> 21) & 0xFF; - padded[i++] = (length >> 13) & 0xFF; - padded[i++] = (length >> 5) & 0xFF; - padded[i++] = (length << 3) & 0xFF; + var activeSMask = this.current.activeSMask; + var drawnWidth = activeSMask.canvas.width; + var drawnHeight = activeSMask.canvas.height; + var cacheId = 'smaskGroupAt' + this.groupLevel; + var scratchCanvas = this.cachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); - var w = new Array(80); - for (i = 0; i < 80; i++) { - w[i] = new Word64(0, 0); - } - var a = new Word64(0, 0), b = new Word64(0, 0), c = new Word64(0, 0); - var d = new Word64(0, 0), e = new Word64(0, 0), f = new Word64(0, 0); - var g = new Word64(0, 0), h = new Word64(0, 0); - var t1 = new Word64(0, 0), t2 = new Word64(0, 0); - var tmp1 = new Word64(0, 0), tmp2 = new Word64(0, 0), tmp3; + var currentCtx = this.ctx; + var currentTransform = currentCtx.mozCurrentTransform; + this.ctx.save(); - // for each 1024 bit block - for (i = 0; i < paddedLength;) { - for (j = 0; j < 16; ++j) { - w[j].high = (padded[i] << 24) | (padded[i + 1] << 16) | - (padded[i + 2] << 8) | (padded[i + 3]); - w[j].low = (padded[i + 4]) << 24 | (padded[i + 5]) << 16 | - (padded[i + 6]) << 8 | (padded[i + 7]); - i += 8; - } - for (j = 16; j < 80; ++j) { - tmp3 = w[j]; - littleSigmaPrime(tmp3, w[j - 2], tmp2); - tmp3.add(w[j - 7]); - littleSigma(tmp1, w[j - 15], tmp2); - tmp3.add(tmp1); - tmp3.add(w[j - 16]); - } + var groupCtx = scratchCanvas.context; + groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); + groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); + groupCtx.transform.apply(groupCtx, currentTransform); - a.assign(h0); b.assign(h1); c.assign(h2); d.assign(h3); - e.assign(h4); f.assign(h5); g.assign(h6); h.assign(h7); - for (j = 0; j < 80; ++j) { - t1.assign(h); - sigmaPrime(tmp1, e, tmp2); - t1.add(tmp1); - ch(tmp1, e, f, g, tmp2); - t1.add(tmp1); - t1.add(k[j]); - t1.add(w[j]); + copyCtxState(currentCtx, groupCtx); + this.ctx = groupCtx; + this.setGState([ + ['BM', 'Normal'], + ['ca', 1], + ['CA', 1] + ]); + this.groupStack.push(currentCtx); + this.groupLevel++; + }, + endSMaskGroup: function CanvasGraphics_endSMaskGroup() { + var groupCtx = this.ctx; + this.groupLevel--; + this.ctx = this.groupStack.pop(); - sigma(t2, a, tmp2); - maj(tmp1, a, b, c, tmp2); - t2.add(tmp1); + composeSMask(this.ctx, this.current.activeSMask, groupCtx); + this.ctx.restore(); + copyCtxState(groupCtx, this.ctx); + }, + save: function CanvasGraphics_save() { + this.ctx.save(); + var old = this.current; + this.stateStack.push(old); + this.current = old.clone(); + this.current.activeSMask = null; + }, + restore: function CanvasGraphics_restore() { + if (this.stateStack.length !== 0) { + if (this.current.activeSMask !== null) { + this.endSMaskGroup(); + } - tmp3 = h; - h = g; - g = f; - f = e; - d.add(t1); - e = d; - d = c; - c = b; - b = a; - tmp3.assign(t1); - tmp3.add(t2); - a = tmp3; + this.current = this.stateStack.pop(); + this.ctx.restore(); + + // Ensure that the clipping path is reset (fixes issue6413.pdf). + this.pendingClip = null; + + this.cachedGetSinglePixelWidth = null; } - h0.add(a); - h1.add(b); - h2.add(c); - h3.add(d); - h4.add(e); - h5.add(f); - h6.add(g); - h7.add(h); - } + }, + transform: function CanvasGraphics_transform(a, b, c, d, e, f) { + this.ctx.transform(a, b, c, d, e, f); - var result; - if (!mode384) { - result = new Uint8Array(64); - h0.copyTo(result,0); - h1.copyTo(result,8); - h2.copyTo(result,16); - h3.copyTo(result,24); - h4.copyTo(result,32); - h5.copyTo(result,40); - h6.copyTo(result,48); - h7.copyTo(result,56); - } - else { - result = new Uint8Array(48); - h0.copyTo(result,0); - h1.copyTo(result,8); - h2.copyTo(result,16); - h3.copyTo(result,24); - h4.copyTo(result,32); - h5.copyTo(result,40); - } - return result; - } + this.cachedGetSinglePixelWidth = null; + }, - return hash; -})(); -var calculateSHA384 = (function calculateSHA384Closure() { - function hash(data, offset, length) { - return calculateSHA512(data, offset, length, true); - } + // Path + constructPath: function CanvasGraphics_constructPath(ops, args) { + var ctx = this.ctx; + var current = this.current; + var x = current.x, y = current.y; + for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { + switch (ops[i] | 0) { + case OPS.rectangle: + x = args[j++]; + y = args[j++]; + var width = args[j++]; + var height = args[j++]; + if (width === 0) { + width = this.getSinglePixelWidth(); + } + if (height === 0) { + height = this.getSinglePixelWidth(); + } + var xw = x + width; + var yh = y + height; + this.ctx.moveTo(x, y); + this.ctx.lineTo(xw, y); + this.ctx.lineTo(xw, yh); + this.ctx.lineTo(x, yh); + this.ctx.lineTo(x, y); + this.ctx.closePath(); + break; + case OPS.moveTo: + x = args[j++]; + y = args[j++]; + ctx.moveTo(x, y); + break; + case OPS.lineTo: + x = args[j++]; + y = args[j++]; + ctx.lineTo(x, y); + break; + case OPS.curveTo: + x = args[j + 4]; + y = args[j + 5]; + ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], + x, y); + j += 6; + break; + case OPS.curveTo2: + ctx.bezierCurveTo(x, y, args[j], args[j + 1], + args[j + 2], args[j + 3]); + x = args[j + 2]; + y = args[j + 3]; + j += 4; + break; + case OPS.curveTo3: + x = args[j + 2]; + y = args[j + 3]; + ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); + j += 4; + break; + case OPS.closePath: + ctx.closePath(); + break; + } + } + current.setCurrentPoint(x, y); + }, + closePath: function CanvasGraphics_closePath() { + this.ctx.closePath(); + }, + stroke: function CanvasGraphics_stroke(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var strokeColor = this.current.strokeColor; + // Prevent drawing too thin lines by enforcing a minimum line width. + ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR, + this.current.lineWidth); + // For stroke we want to temporarily change the global alpha to the + // stroking alpha. + ctx.globalAlpha = this.current.strokeAlpha; + if (strokeColor && strokeColor.hasOwnProperty('type') && + strokeColor.type === 'Pattern') { + // for patterns, we transform to pattern space, calculate + // the pattern, call stroke, and restore to user space + ctx.save(); + ctx.strokeStyle = strokeColor.getPattern(ctx, this); + ctx.stroke(); + ctx.restore(); + } else { + ctx.stroke(); + } + if (consumePath) { + this.consumePath(); + } + // Restore the global alpha to the fill alpha + ctx.globalAlpha = this.current.fillAlpha; + }, + closeStroke: function CanvasGraphics_closeStroke() { + this.closePath(); + this.stroke(); + }, + fill: function CanvasGraphics_fill(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + var needRestore = false; - return hash; -})(); -var NullCipher = (function NullCipherClosure() { - function NullCipher() { - } + if (isPatternFill) { + ctx.save(); + if (this.baseTransform) { + ctx.setTransform.apply(ctx, this.baseTransform); + } + ctx.fillStyle = fillColor.getPattern(ctx, this); + needRestore = true; + } - NullCipher.prototype = { - decryptBlock: function NullCipher_decryptBlock(data) { - return data; - } - }; + if (this.pendingEOFill) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.fill(); + ctx.mozFillRule = 'nonzero'; + } else { + ctx.fill('evenodd'); + } + this.pendingEOFill = false; + } else { + ctx.fill(); + } - return NullCipher; -})(); + if (needRestore) { + ctx.restore(); + } + if (consumePath) { + this.consumePath(); + } + }, + eoFill: function CanvasGraphics_eoFill() { + this.pendingEOFill = true; + this.fill(); + }, + fillStroke: function CanvasGraphics_fillStroke() { + this.fill(false); + this.stroke(false); -var AES128Cipher = (function AES128CipherClosure() { - var rcon = new Uint8Array([ - 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, - 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, - 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, - 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, - 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, - 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, - 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, - 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, - 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, - 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, - 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, - 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, - 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, - 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, - 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, - 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, - 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, - 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, - 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, - 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, - 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, - 0x74, 0xe8, 0xcb, 0x8d]); + this.consumePath(); + }, + eoFillStroke: function CanvasGraphics_eoFillStroke() { + this.pendingEOFill = true; + this.fillStroke(); + }, + closeFillStroke: function CanvasGraphics_closeFillStroke() { + this.closePath(); + this.fillStroke(); + }, + closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { + this.pendingEOFill = true; + this.closePath(); + this.fillStroke(); + }, + endPath: function CanvasGraphics_endPath() { + this.consumePath(); + }, - var s = new Uint8Array([ - 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, - 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, - 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, - 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, - 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, - 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, - 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, - 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, - 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, - 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, - 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, - 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, - 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, - 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, - 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, - 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, - 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, - 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, - 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, - 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, - 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, - 0xb0, 0x54, 0xbb, 0x16]); + // Clipping + clip: function CanvasGraphics_clip() { + this.pendingClip = NORMAL_CLIP; + }, + eoClip: function CanvasGraphics_eoClip() { + this.pendingClip = EO_CLIP; + }, - var inv_s = new Uint8Array([ - 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, - 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, - 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, - 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, - 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, - 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, - 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, - 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, - 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, - 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, - 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, - 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, - 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, - 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, - 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, - 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, - 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, - 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, - 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, - 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, - 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, - 0x55, 0x21, 0x0c, 0x7d]); - var mixCol = new Uint8Array(256); - for (var i = 0; i < 256; i++) { - if (i < 128) { - mixCol[i] = i << 1; - } else { - mixCol[i] = (i << 1) ^ 0x1b; - } - } - var mix = new Uint32Array([ - 0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, - 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, - 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, - 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, - 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, - 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, - 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, - 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, - 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, - 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, - 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, - 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, - 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, - 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, - 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, - 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, - 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, - 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, - 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, - 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, - 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, - 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, - 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, - 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, - 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, - 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, - 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, - 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, - 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, - 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, - 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, - 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, - 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, - 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, - 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, - 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, - 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, - 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, - 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, - 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, - 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, - 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, - 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3]); + // Text + beginText: function CanvasGraphics_beginText() { + this.current.textMatrix = IDENTITY_MATRIX; + this.current.textMatrixScale = 1; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + endText: function CanvasGraphics_endText() { + var paths = this.pendingTextPaths; + var ctx = this.ctx; + if (paths === undefined) { + ctx.beginPath(); + return; + } + + ctx.save(); + ctx.beginPath(); + for (var i = 0; i < paths.length; i++) { + var path = paths[i]; + ctx.setTransform.apply(ctx, path.transform); + ctx.translate(path.x, path.y); + path.addToPath(ctx, path.fontSize); + } + ctx.restore(); + ctx.clip(); + ctx.beginPath(); + delete this.pendingTextPaths; + }, + setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { + this.current.charSpacing = spacing; + }, + setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { + this.current.wordSpacing = spacing; + }, + setHScale: function CanvasGraphics_setHScale(scale) { + this.current.textHScale = scale / 100; + }, + setLeading: function CanvasGraphics_setLeading(leading) { + this.current.leading = -leading; + }, + setFont: function CanvasGraphics_setFont(fontRefName, size) { + var fontObj = this.commonObjs.get(fontRefName); + var current = this.current; - function expandKey128(cipherKey) { - var b = 176, result = new Uint8Array(b); - result.set(cipherKey); - for (var j = 16, i = 1; j < b; ++i) { - // RotWord - var t1 = result[j - 3], t2 = result[j - 2], - t3 = result[j - 1], t4 = result[j - 4]; - // SubWord - t1 = s[t1]; - t2 = s[t2]; - t3 = s[t3]; - t4 = s[t4]; - // Rcon - t1 = t1 ^ rcon[i]; - for (var n = 0; n < 4; ++n) { - result[j] = (t1 ^= result[j - 16]); - j++; - result[j] = (t2 ^= result[j - 16]); - j++; - result[j] = (t3 ^= result[j - 16]); - j++; - result[j] = (t4 ^= result[j - 16]); - j++; + if (!fontObj) { + error('Can\'t find font for ' + fontRefName); } - } - return result; - } - function decrypt128(input, key) { - var state = new Uint8Array(16); - state.set(input); - var i, j, k; - var t, u, v; - // AddRoundKey - for (j = 0, k = 160; j < 16; ++j, ++k) { - state[j] ^= key[k]; - } - for (i = 9; i >= 1; --i) { - // InvShiftRows - t = state[13]; - state[13] = state[9]; - state[9] = state[5]; - state[5] = state[1]; - state[1] = t; - t = state[14]; - u = state[10]; - state[14] = state[6]; - state[10] = state[2]; - state[6] = t; - state[2] = u; - t = state[15]; - u = state[11]; - v = state[7]; - state[15] = state[3]; - state[11] = t; - state[7] = u; - state[3] = v; - // InvSubBytes - for (j = 0; j < 16; ++j) { - state[j] = inv_s[state[j]]; + current.fontMatrix = (fontObj.fontMatrix ? + fontObj.fontMatrix : FONT_IDENTITY_MATRIX); + + // A valid matrix needs all main diagonal elements to be non-zero + // This also ensures we bypass FF bugzilla bug #719844. + if (current.fontMatrix[0] === 0 || + current.fontMatrix[3] === 0) { + warn('Invalid font matrix for font ' + fontRefName); } - // AddRoundKey - for (j = 0, k = i * 16; j < 16; ++j, ++k) { - state[j] ^= key[k]; + + // The spec for Tf (setFont) says that 'size' specifies the font 'scale', + // and in some docs this can be negative (inverted x-y axes). + if (size < 0) { + size = -size; + current.fontDirection = -1; + } else { + current.fontDirection = 1; } - // InvMixColumns - for (j = 0; j < 16; j += 4) { - var s0 = mix[state[j]], s1 = mix[state[j + 1]], - s2 = mix[state[j + 2]], s3 = mix[state[j + 3]]; - t = (s0 ^ (s1 >>> 8) ^ (s1 << 24) ^ (s2 >>> 16) ^ (s2 << 16) ^ - (s3 >>> 24) ^ (s3 << 8)); - state[j] = (t >>> 24) & 0xFF; - state[j + 1] = (t >> 16) & 0xFF; - state[j + 2] = (t >> 8) & 0xFF; - state[j + 3] = t & 0xFF; + + this.current.font = fontObj; + this.current.fontSize = size; + + if (fontObj.isType3Font) { + return; // we don't need ctx.font for Type3 fonts } - } - // InvShiftRows - t = state[13]; - state[13] = state[9]; - state[9] = state[5]; - state[5] = state[1]; - state[1] = t; - t = state[14]; - u = state[10]; - state[14] = state[6]; - state[10] = state[2]; - state[6] = t; - state[2] = u; - t = state[15]; - u = state[11]; - v = state[7]; - state[15] = state[3]; - state[11] = t; - state[7] = u; - state[3] = v; - for (j = 0; j < 16; ++j) { - // InvSubBytes - state[j] = inv_s[state[j]]; - // AddRoundKey - state[j] ^= key[j]; - } - return state; - } - function encrypt128(input, key) { - var t, u, v, k; - var state = new Uint8Array(16); - state.set(input); - for (j = 0; j < 16; ++j) { - // AddRoundKey - state[j] ^= key[j]; - } + var name = fontObj.loadedName || 'sans-serif'; + var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); - for (i = 1; i < 10; i++) { - //SubBytes - for (j = 0; j < 16; ++j) { - state[j] = s[state[j]]; + var italic = fontObj.italic ? 'italic' : 'normal'; + var typeface = '"' + name + '", ' + fontObj.fallbackName; + + // Some font backends cannot handle fonts below certain size. + // Keeping the font at minimal size and using the fontSizeScale to change + // the current transformation matrix before the fillText/strokeText. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 + var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE : + size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size; + this.current.fontSizeScale = size / browserFontSize; + + var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; + this.ctx.font = rule; + }, + setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { + this.current.textRenderingMode = mode; + }, + setTextRise: function CanvasGraphics_setTextRise(rise) { + this.current.textRise = rise; + }, + moveText: function CanvasGraphics_moveText(x, y) { + this.current.x = this.current.lineX += x; + this.current.y = this.current.lineY += y; + }, + setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { + this.setLeading(-y); + this.moveText(x, y); + }, + setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { + this.current.textMatrix = [a, b, c, d, e, f]; + this.current.textMatrixScale = Math.sqrt(a * a + b * b); + + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + nextLine: function CanvasGraphics_nextLine() { + this.moveText(0, this.current.leading); + }, + + paintChar: function CanvasGraphics_paintChar(character, x, y) { + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var textRenderingMode = current.textRenderingMode; + var fontSize = current.fontSize / current.fontSizeScale; + var fillStrokeMode = textRenderingMode & + TextRenderingMode.FILL_STROKE_MASK; + var isAddToPathSet = !!(textRenderingMode & + TextRenderingMode.ADD_TO_PATH_FLAG); + + var addToPath; + if (font.disableFontFace || isAddToPathSet) { + addToPath = font.getPathGenerator(this.commonObjs, character); } - //ShiftRows - v = state[1]; - state[1] = state[5]; - state[5] = state[9]; - state[9] = state[13]; - state[13] = v; - v = state[2]; - u = state[6]; - state[2] = state[10]; - state[6] = state[14]; - state[10] = v; - state[14] = u; - v = state[3]; - u = state[7]; - t = state[11]; - state[3] = state[15]; - state[7] = v; - state[11] = u; - state[15] = t; - //MixColumns - for (var j = 0; j < 16; j += 4) { - var s0 = state[j + 0], s1 = state[j + 1]; - var s2 = state[j + 2], s3 = state[j + 3]; - t = s0 ^ s1 ^ s2 ^ s3; - state[j + 0] ^= t ^ mixCol[s0 ^ s1]; - state[j + 1] ^= t ^ mixCol[s1 ^ s2]; - state[j + 2] ^= t ^ mixCol[s2 ^ s3]; - state[j + 3] ^= t ^ mixCol[s3 ^ s0]; + + if (font.disableFontFace) { + ctx.save(); + ctx.translate(x, y); + ctx.beginPath(); + addToPath(ctx, fontSize); + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fill(); + } + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.stroke(); + } + ctx.restore(); + } else { + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fillText(character, x, y); + } + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.strokeText(character, x, y); + } } - //AddRoundKey - for (j = 0, k = i * 16; j < 16; ++j, ++k) { - state[j] ^= key[k]; + + if (isAddToPathSet) { + var paths = this.pendingTextPaths || (this.pendingTextPaths = []); + paths.push({ + transform: ctx.mozCurrentTransform, + x: x, + y: y, + fontSize: fontSize, + addToPath: addToPath + }); } - } + }, - //SubBytes - for (j = 0; j < 16; ++j) { - state[j] = s[state[j]]; - } - //ShiftRows - v = state[1]; - state[1] = state[5]; - state[5] = state[9]; - state[9] = state[13]; - state[13] = v; - v = state[2]; - u = state[6]; - state[2] = state[10]; - state[6] = state[14]; - state[10] = v; - state[14] = u; - v = state[3]; - u = state[7]; - t = state[11]; - state[3] = state[15]; - state[7] = v; - state[11] = u; - state[15] = t; - //AddRoundKey - for (j = 0, k = 160; j < 16; ++j, ++k) { - state[j] ^= key[k]; - } - return state; - } + get isFontSubpixelAAEnabled() { + // Checks if anti-aliasing is enabled when scaled text is painted. + // On Windows GDI scaled fonts looks bad. + var ctx = document.createElement('canvas').getContext('2d'); + ctx.scale(1.5, 1); + ctx.fillText('I', 0, 10); + var data = ctx.getImageData(0, 0, 10, 10).data; + var enabled = false; + for (var i = 3; i < data.length; i += 4) { + if (data[i] > 0 && data[i] < 255) { + enabled = true; + break; + } + } + return shadow(this, 'isFontSubpixelAAEnabled', enabled); + }, - function AES128Cipher(key) { - this.key = expandKey128(key); - this.buffer = new Uint8Array(16); - this.bufferPosition = 0; - } + showText: function CanvasGraphics_showText(glyphs) { + var current = this.current; + var font = current.font; + if (font.isType3Font) { + return this.showType3Text(glyphs); + } - function decryptBlock2(data, finalize) { - var i, j, ii, sourceLength = data.length, - buffer = this.buffer, bufferLength = this.bufferPosition, - result = [], iv = this.iv; - for (i = 0; i < sourceLength; ++i) { - buffer[bufferLength] = data[i]; - ++bufferLength; - if (bufferLength < 16) { - continue; + var fontSize = current.fontSize; + if (fontSize === 0) { + return; } - // buffer is full, decrypting - var plain = decrypt128(buffer, this.key); - // xor-ing the IV vector to get plain text - for (j = 0; j < 16; ++j) { - plain[j] ^= iv[j]; + + var ctx = this.ctx; + var fontSizeScale = current.fontSizeScale; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var fontDirection = current.fontDirection; + var textHScale = current.textHScale * fontDirection; + var glyphsLength = glyphs.length; + var vertical = font.vertical; + var spacingDir = vertical ? 1 : -1; + var defaultVMetrics = font.defaultVMetrics; + var widthAdvanceScale = fontSize * current.fontMatrix[0]; + + var simpleFillText = + current.textRenderingMode === TextRenderingMode.FILL && + !font.disableFontFace; + + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y + current.textRise); + + if (fontDirection > 0) { + ctx.scale(textHScale, -1); + } else { + ctx.scale(textHScale, 1); } - iv = buffer; - result.push(plain); - buffer = new Uint8Array(16); - bufferLength = 0; - } - // saving incomplete buffer - this.buffer = buffer; - this.bufferLength = bufferLength; - this.iv = iv; - if (result.length === 0) { - return new Uint8Array([]); - } - // combining plain text blocks into one - var outputLength = 16 * result.length; - if (finalize) { - // undo a padding that is described in RFC 2898 - var lastBlock = result[result.length - 1]; - var psLen = lastBlock[15]; - if (psLen <= 16) { - for (i = 15, ii = 16 - psLen; i >= ii; --i) { - if (lastBlock[i] !== psLen) { - // Invalid padding, assume that the block has no padding. - psLen = 0; - break; - } + + var lineWidth = current.lineWidth; + var scale = current.textMatrixScale; + if (scale === 0 || lineWidth === 0) { + var fillStrokeMode = current.textRenderingMode & + TextRenderingMode.FILL_STROKE_MASK; + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + this.cachedGetSinglePixelWidth = null; + lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR; } - outputLength -= psLen; - result[result.length - 1] = lastBlock.subarray(0, 16 - psLen); + } else { + lineWidth /= scale; } - } - var output = new Uint8Array(outputLength); - for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { - output.set(result[i], j); - } - return output; - } - AES128Cipher.prototype = { - decryptBlock: function AES128Cipher_decryptBlock(data, finalize) { - var i, sourceLength = data.length; - var buffer = this.buffer, bufferLength = this.bufferPosition; - // waiting for IV values -- they are at the start of the stream - for (i = 0; bufferLength < 16 && i < sourceLength; ++i, ++bufferLength) { - buffer[bufferLength] = data[i]; + if (fontSizeScale !== 1.0) { + ctx.scale(fontSizeScale, fontSizeScale); + lineWidth /= fontSizeScale; } - if (bufferLength < 16) { - // need more data - this.bufferLength = bufferLength; - return new Uint8Array([]); + + ctx.lineWidth = lineWidth; + + var x = 0, i; + for (i = 0; i < glyphsLength; ++i) { + var glyph = glyphs[i]; + if (isNum(glyph)) { + x += spacingDir * glyph * fontSize / 1000; + continue; + } + + var restoreNeeded = false; + var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; + var character = glyph.fontChar; + var accent = glyph.accent; + var scaledX, scaledY, scaledAccentX, scaledAccentY; + var width = glyph.width; + if (vertical) { + var vmetric, vx, vy; + vmetric = glyph.vmetric || defaultVMetrics; + vx = glyph.vmetric ? vmetric[1] : width * 0.5; + vx = -vx * widthAdvanceScale; + vy = vmetric[2] * widthAdvanceScale; + + width = vmetric ? -vmetric[0] : width; + scaledX = vx / fontSizeScale; + scaledY = (x + vy) / fontSizeScale; + } else { + scaledX = x / fontSizeScale; + scaledY = 0; + } + + if (font.remeasure && width > 0) { + // Some standard fonts may not have the exact width: rescale per + // character if measured width is greater than expected glyph width + // and subpixel-aa is enabled, otherwise just center the glyph. + var measuredWidth = ctx.measureText(character).width * 1000 / + fontSize * fontSizeScale; + if (width < measuredWidth && this.isFontSubpixelAAEnabled) { + var characterScaleX = width / measuredWidth; + restoreNeeded = true; + ctx.save(); + ctx.scale(characterScaleX, 1); + scaledX /= characterScaleX; + } else if (width !== measuredWidth) { + scaledX += (width - measuredWidth) / 2000 * + fontSize / fontSizeScale; + } + } + + if (simpleFillText && !accent) { + // common case + ctx.fillText(character, scaledX, scaledY); + } else { + this.paintChar(character, scaledX, scaledY); + if (accent) { + scaledAccentX = scaledX + accent.offset.x / fontSizeScale; + scaledAccentY = scaledY - accent.offset.y / fontSizeScale; + this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); + } + } + + var charWidth = width * widthAdvanceScale + spacing * fontDirection; + x += charWidth; + + if (restoreNeeded) { + ctx.restore(); + } } - this.iv = buffer; - this.buffer = new Uint8Array(16); - this.bufferLength = 0; - // starting decryption - this.decryptBlock = decryptBlock2; - return this.decryptBlock(data.subarray(16), finalize); - }, - encrypt: function AES128Cipher_encrypt(data, iv) { - var i, j, ii, sourceLength = data.length, - buffer = this.buffer, bufferLength = this.bufferPosition, - result = []; - if (!iv) { - iv = new Uint8Array(16); + if (vertical) { + current.y -= x * textHScale; + } else { + current.x += x * textHScale; + } + ctx.restore(); + }, + + showType3Text: function CanvasGraphics_showType3Text(glyphs) { + // Type3 fonts - each glyph is a "mini-PDF" + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var fontSize = current.fontSize; + var fontDirection = current.fontDirection; + var spacingDir = font.vertical ? 1 : -1; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var textHScale = current.textHScale * fontDirection; + var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; + var glyphsLength = glyphs.length; + var isTextInvisible = + current.textRenderingMode === TextRenderingMode.INVISIBLE; + var i, glyph, width, spacingLength; + + if (isTextInvisible || fontSize === 0) { + return; } - for (i = 0; i < sourceLength; ++i) { - buffer[bufferLength] = data[i]; - ++bufferLength; - if (bufferLength < 16) { + this.cachedGetSinglePixelWidth = null; + + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y); + + ctx.scale(textHScale, fontDirection); + + for (i = 0; i < glyphsLength; ++i) { + glyph = glyphs[i]; + if (isNum(glyph)) { + spacingLength = spacingDir * glyph * fontSize / 1000; + this.ctx.translate(spacingLength, 0); + current.x += spacingLength * textHScale; continue; } - for (j = 0; j < 16; ++j) { - buffer[j] ^= iv[j]; + + var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; + var operatorList = font.charProcOperatorList[glyph.operatorListId]; + if (!operatorList) { + warn('Type3 character \"' + glyph.operatorListId + + '\" is not available'); + continue; } + this.processingType3 = glyph; + this.save(); + ctx.scale(fontSize, fontSize); + ctx.transform.apply(ctx, fontMatrix); + this.executeOperatorList(operatorList); + this.restore(); - // buffer is full, encrypting - var cipher = encrypt128(buffer, this.key); - iv = cipher; - result.push(cipher); - buffer = new Uint8Array(16); - bufferLength = 0; - } - // saving incomplete buffer - this.buffer = buffer; - this.bufferLength = bufferLength; - this.iv = iv; - if (result.length === 0) { - return new Uint8Array([]); + var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); + width = transformed[0] * fontSize + spacing; + + ctx.translate(width, 0); + current.x += width * textHScale; } - // combining plain text blocks into one - var outputLength = 16 * result.length; - var output = new Uint8Array(outputLength); - for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { - output.set(result[i], j); + ctx.restore(); + this.processingType3 = null; + }, + + // Type3 fonts + setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { + // We can safely ignore this since the width should be the same + // as the width in the Widths array. + }, + setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, + yWidth, + llx, + lly, + urx, + ury) { + // TODO According to the spec we're also suppose to ignore any operators + // that set color or include images while processing this type3 font. + this.ctx.rect(llx, lly, urx - llx, ury - lly); + this.clip(); + this.endPath(); + }, + + // Color + getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { + var pattern; + if (IR[0] === 'TilingPattern') { + var color = IR[1]; + var baseTransform = this.baseTransform || + this.ctx.mozCurrentTransform.slice(); + var self = this; + var canvasGraphicsFactory = { + createCanvasGraphics: function (ctx) { + return new CanvasGraphics(ctx, self.commonObjs, self.objs); + } + }; + pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, + baseTransform); + } else { + pattern = getShadingPatternFromIR(IR); } - return output; - } - }; + return pattern; + }, + setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { + this.current.strokeColor = this.getColorN_Pattern(arguments); + }, + setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { + this.current.fillColor = this.getColorN_Pattern(arguments); + this.current.patternFill = true; + }, + setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.ctx.strokeStyle = color; + this.current.strokeColor = color; + }, + setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.ctx.fillStyle = color; + this.current.fillColor = color; + this.current.patternFill = false; + }, - return AES128Cipher; -})(); + shadingFill: function CanvasGraphics_shadingFill(patternIR) { + var ctx = this.ctx; -var AES256Cipher = (function AES256CipherClosure() { - var rcon = new Uint8Array([ - 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, - 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, - 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, - 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, - 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, - 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, - 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, - 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, - 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, - 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, - 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, - 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, - 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, 0x8d, 0x01, 0x02, - 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, - 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, - 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, 0x61, 0xc2, 0x9f, - 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, 0x74, 0xe8, 0xcb, - 0x8d, 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, - 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, - 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91, 0x39, 0x72, 0xe4, 0xd3, 0xbd, - 0x61, 0xc2, 0x9f, 0x25, 0x4a, 0x94, 0x33, 0x66, 0xcc, 0x83, 0x1d, 0x3a, - 0x74, 0xe8, 0xcb, 0x8d]); + this.save(); + var pattern = getShadingPatternFromIR(patternIR); + ctx.fillStyle = pattern.getPattern(ctx, this, true); - var s = new Uint8Array([ - 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, - 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, - 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, - 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, - 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, - 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, - 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, - 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, - 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, - 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, - 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, - 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, - 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, - 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, - 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, - 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, - 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, - 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, - 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, - 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, - 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, - 0xb0, 0x54, 0xbb, 0x16]); + var inv = ctx.mozCurrentTransformInverse; + if (inv) { + var canvas = ctx.canvas; + var width = canvas.width; + var height = canvas.height; - var inv_s = new Uint8Array([ - 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, - 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, - 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, - 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, - 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, - 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, - 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, - 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, - 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, - 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, - 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, - 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, - 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, - 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, - 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, - 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, - 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, - 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, - 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, - 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, - 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, - 0x55, 0x21, 0x0c, 0x7d]); + var bl = Util.applyTransform([0, 0], inv); + var br = Util.applyTransform([0, height], inv); + var ul = Util.applyTransform([width, 0], inv); + var ur = Util.applyTransform([width, height], inv); - var mixCol = new Uint8Array(256); - for (var i = 0; i < 256; i++) { - if (i < 128) { - mixCol[i] = i << 1; - } else { - mixCol[i] = (i << 1) ^ 0x1b; - } - } - var mix = new Uint32Array([ - 0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, - 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, - 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, - 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, - 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, - 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, - 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, - 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, - 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, - 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, - 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, - 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, - 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, - 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, - 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, - 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, - 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, - 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, - 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, - 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, - 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, - 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, - 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, - 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, - 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, - 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, - 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, - 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, - 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, - 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, - 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, - 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, - 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, - 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, - 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, - 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, - 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, - 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, - 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, - 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, - 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, - 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, - 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3]); + var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); + var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); + var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); + var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); - function expandKey256(cipherKey) { - var b = 240, result = new Uint8Array(b); - var r = 1; + this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); + } else { + // HACK to draw the gradient onto an infinite rectangle. + // PDF gradients are drawn across the entire image while + // Canvas only allows gradients to be drawn in a rectangle + // The following bug should allow us to remove this. + // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 - result.set(cipherKey); - for (var j = 32, i = 1; j < b; ++i) { - if (j % 32 === 16) { - t1 = s[t1]; - t2 = s[t2]; - t3 = s[t3]; - t4 = s[t4]; - } else if (j % 32 === 0) { - // RotWord - var t1 = result[j - 3], t2 = result[j - 2], - t3 = result[j - 1], t4 = result[j - 4]; - // SubWord - t1 = s[t1]; - t2 = s[t2]; - t3 = s[t3]; - t4 = s[t4]; - // Rcon - t1 = t1 ^ r; - if ((r <<= 1) >= 256) { - r = (r ^ 0x1b) & 0xFF; - } + this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); } - for (var n = 0; n < 4; ++n) { - result[j] = (t1 ^= result[j - 32]); - j++; - result[j] = (t2 ^= result[j - 32]); - j++; - result[j] = (t3 ^= result[j - 32]); - j++; - result[j] = (t4 ^= result[j - 32]); - j++; - } - } - return result; - } + this.restore(); + }, - function decrypt256(input, key) { - var state = new Uint8Array(16); - state.set(input); - var i, j, k; - var t, u, v; - // AddRoundKey - for (j = 0, k = 224; j < 16; ++j, ++k) { - state[j] ^= key[k]; - } - for (i = 13; i >= 1; --i) { - // InvShiftRows - t = state[13]; - state[13] = state[9]; - state[9] = state[5]; - state[5] = state[1]; - state[1] = t; - t = state[14]; - u = state[10]; - state[14] = state[6]; - state[10] = state[2]; - state[6] = t; - state[2] = u; - t = state[15]; - u = state[11]; - v = state[7]; - state[15] = state[3]; - state[11] = t; - state[7] = u; - state[3] = v; - // InvSubBytes - for (j = 0; j < 16; ++j) { - state[j] = inv_s[state[j]]; + // Images + beginInlineImage: function CanvasGraphics_beginInlineImage() { + error('Should not call beginInlineImage'); + }, + beginImageData: function CanvasGraphics_beginImageData() { + error('Should not call beginImageData'); + }, + + paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, + bbox) { + this.save(); + this.baseTransformStack.push(this.baseTransform); + + if (isArray(matrix) && 6 === matrix.length) { + this.transform.apply(this, matrix); } - // AddRoundKey - for (j = 0, k = i * 16; j < 16; ++j, ++k) { - state[j] ^= key[k]; + + this.baseTransform = this.ctx.mozCurrentTransform; + + if (isArray(bbox) && 4 === bbox.length) { + var width = bbox[2] - bbox[0]; + var height = bbox[3] - bbox[1]; + this.ctx.rect(bbox[0], bbox[1], width, height); + this.clip(); + this.endPath(); } - // InvMixColumns - for (j = 0; j < 16; j += 4) { - var s0 = mix[state[j]], s1 = mix[state[j + 1]], - s2 = mix[state[j + 2]], s3 = mix[state[j + 3]]; - t = (s0 ^ (s1 >>> 8) ^ (s1 << 24) ^ (s2 >>> 16) ^ (s2 << 16) ^ - (s3 >>> 24) ^ (s3 << 8)); - state[j] = (t >>> 24) & 0xFF; - state[j + 1] = (t >> 16) & 0xFF; - state[j + 2] = (t >> 8) & 0xFF; - state[j + 3] = t & 0xFF; + }, + + paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { + this.restore(); + this.baseTransform = this.baseTransformStack.pop(); + }, + + beginGroup: function CanvasGraphics_beginGroup(group) { + this.save(); + var currentCtx = this.ctx; + // TODO non-isolated groups - according to Rik at adobe non-isolated + // group results aren't usually that different and they even have tools + // that ignore this setting. Notes from Rik on implmenting: + // - When you encounter an transparency group, create a new canvas with + // the dimensions of the bbox + // - copy the content from the previous canvas to the new canvas + // - draw as usual + // - remove the backdrop alpha: + // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha + // value of your transparency group and 'alphaBackdrop' the alpha of the + // backdrop + // - remove background color: + // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) + if (!group.isolated) { + info('TODO: Support non-isolated groups.'); } - } - // InvShiftRows - t = state[13]; - state[13] = state[9]; - state[9] = state[5]; - state[5] = state[1]; - state[1] = t; - t = state[14]; - u = state[10]; - state[14] = state[6]; - state[10] = state[2]; - state[6] = t; - state[2] = u; - t = state[15]; - u = state[11]; - v = state[7]; - state[15] = state[3]; - state[11] = t; - state[7] = u; - state[3] = v; - for (j = 0; j < 16; ++j) { - // InvSubBytes - state[j] = inv_s[state[j]]; - // AddRoundKey - state[j] ^= key[j]; - } - return state; - } - function encrypt256(input, key) { - var t, u, v, k; - var state = new Uint8Array(16); - state.set(input); - for (j = 0; j < 16; ++j) { - // AddRoundKey - state[j] ^= key[j]; - } + // TODO knockout - supposedly possible with the clever use of compositing + // modes. + if (group.knockout) { + warn('Knockout groups not supported.'); + } - for (i = 1; i < 14; i++) { - //SubBytes - for (j = 0; j < 16; ++j) { - state[j] = s[state[j]]; + var currentTransform = currentCtx.mozCurrentTransform; + if (group.matrix) { + currentCtx.transform.apply(currentCtx, group.matrix); } - //ShiftRows - v = state[1]; - state[1] = state[5]; - state[5] = state[9]; - state[9] = state[13]; - state[13] = v; - v = state[2]; - u = state[6]; - state[2] = state[10]; - state[6] = state[14]; - state[10] = v; - state[14] = u; - v = state[3]; - u = state[7]; - t = state[11]; - state[3] = state[15]; - state[7] = v; - state[11] = u; - state[15] = t; - //MixColumns - for (var j = 0; j < 16; j += 4) { - var s0 = state[j + 0], s1 = state[j + 1]; - var s2 = state[j + 2], s3 = state[j + 3]; - t = s0 ^ s1 ^ s2 ^ s3; - state[j + 0] ^= t ^ mixCol[s0 ^ s1]; - state[j + 1] ^= t ^ mixCol[s1 ^ s2]; - state[j + 2] ^= t ^ mixCol[s2 ^ s3]; - state[j + 3] ^= t ^ mixCol[s3 ^ s0]; + assert(group.bbox, 'Bounding box is required.'); + + // Based on the current transform figure out how big the bounding box + // will actually be. + var bounds = Util.getAxialAlignedBoundingBox( + group.bbox, + currentCtx.mozCurrentTransform); + // Clip the bounding box to the current canvas. + var canvasBounds = [0, + 0, + currentCtx.canvas.width, + currentCtx.canvas.height]; + bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; + // Use ceil in case we're between sizes so we don't create canvas that is + // too small and make the canvas at least 1x1 pixels. + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); + var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); + var scaleX = 1, scaleY = 1; + if (drawnWidth > MAX_GROUP_SIZE) { + scaleX = drawnWidth / MAX_GROUP_SIZE; + drawnWidth = MAX_GROUP_SIZE; } - //AddRoundKey - for (j = 0, k = i * 16; j < 16; ++j, ++k) { - state[j] ^= key[k]; + if (drawnHeight > MAX_GROUP_SIZE) { + scaleY = drawnHeight / MAX_GROUP_SIZE; + drawnHeight = MAX_GROUP_SIZE; } - } - - //SubBytes - for (j = 0; j < 16; ++j) { - state[j] = s[state[j]]; - } - //ShiftRows - v = state[1]; - state[1] = state[5]; - state[5] = state[9]; - state[9] = state[13]; - state[13] = v; - v = state[2]; - u = state[6]; - state[2] = state[10]; - state[6] = state[14]; - state[10] = v; - state[14] = u; - v = state[3]; - u = state[7]; - t = state[11]; - state[3] = state[15]; - state[7] = v; - state[11] = u; - state[15] = t; - //AddRoundKey - for (j = 0, k = 224; j < 16; ++j, ++k) { - state[j] ^= key[k]; - } - return state; - - } + var cacheId = 'groupAt' + this.groupLevel; + if (group.smask) { + // Using two cache entries is case if masks are used one after another. + cacheId += '_smask_' + ((this.smaskCounter++) % 2); + } + var scratchCanvas = this.cachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); + var groupCtx = scratchCanvas.context; - function AES256Cipher(key) { - this.key = expandKey256(key); - this.buffer = new Uint8Array(16); - this.bufferPosition = 0; - } + // Since we created a new canvas that is just the size of the bounding box + // we have to translate the group ctx. + groupCtx.scale(1 / scaleX, 1 / scaleY); + groupCtx.translate(-offsetX, -offsetY); + groupCtx.transform.apply(groupCtx, currentTransform); - function decryptBlock2(data, finalize) { - var i, j, ii, sourceLength = data.length, - buffer = this.buffer, bufferLength = this.bufferPosition, - result = [], iv = this.iv; + if (group.smask) { + // Saving state and cached mask to be used in setGState. + this.smaskStack.push({ + canvas: scratchCanvas.canvas, + context: groupCtx, + offsetX: offsetX, + offsetY: offsetY, + scaleX: scaleX, + scaleY: scaleY, + subtype: group.smask.subtype, + backdrop: group.smask.backdrop, + transferMap: group.smask.transferMap || null + }); + } else { + // Setup the current ctx so when the group is popped we draw it at the + // right location. + currentCtx.setTransform(1, 0, 0, 1, 0, 0); + currentCtx.translate(offsetX, offsetY); + currentCtx.scale(scaleX, scaleY); + } + // The transparency group inherits all off the current graphics state + // except the blend mode, soft mask, and alpha constants. + copyCtxState(currentCtx, groupCtx); + this.ctx = groupCtx; + this.setGState([ + ['BM', 'Normal'], + ['ca', 1], + ['CA', 1] + ]); + this.groupStack.push(currentCtx); + this.groupLevel++; + }, - for (i = 0; i < sourceLength; ++i) { - buffer[bufferLength] = data[i]; - ++bufferLength; - if (bufferLength < 16) { - continue; + endGroup: function CanvasGraphics_endGroup(group) { + this.groupLevel--; + var groupCtx = this.ctx; + this.ctx = this.groupStack.pop(); + // Turn off image smoothing to avoid sub pixel interpolation which can + // look kind of blurry for some pdfs. + if (this.ctx.imageSmoothingEnabled !== undefined) { + this.ctx.imageSmoothingEnabled = false; + } else { + this.ctx.mozImageSmoothingEnabled = false; } - // buffer is full, decrypting - var plain = decrypt256(buffer, this.key); - // xor-ing the IV vector to get plain text - for (j = 0; j < 16; ++j) { - plain[j] ^= iv[j]; + if (group.smask) { + this.tempSMask = this.smaskStack.pop(); + } else { + this.ctx.drawImage(groupCtx.canvas, 0, 0); } - iv = buffer; - result.push(plain); - buffer = new Uint8Array(16); - bufferLength = 0; - } - // saving incomplete buffer - this.buffer = buffer; - this.bufferLength = bufferLength; - this.iv = iv; - if (result.length === 0) { - return new Uint8Array([]); - } - // combining plain text blocks into one - var outputLength = 16 * result.length; - if (finalize) { - // undo a padding that is described in RFC 2898 - var lastBlock = result[result.length - 1]; - var psLen = lastBlock[15]; - if (psLen <= 16) { - for (i = 15, ii = 16 - psLen; i >= ii; --i) { - if (lastBlock[i] !== psLen) { - // Invalid padding, assume that the block has no padding. - psLen = 0; - break; - } - } - outputLength -= psLen; - result[result.length - 1] = lastBlock.subarray(0, 16 - psLen); + this.restore(); + }, + + beginAnnotations: function CanvasGraphics_beginAnnotations() { + this.save(); + this.current = new CanvasExtraState(); + + if (this.baseTransform) { + this.ctx.setTransform.apply(this.ctx, this.baseTransform); } - } - var output = new Uint8Array(outputLength); - for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { - output.set(result[i], j); - } - return output; + }, - } + endAnnotations: function CanvasGraphics_endAnnotations() { + this.restore(); + }, - AES256Cipher.prototype = { - decryptBlock: function AES256Cipher_decryptBlock(data, finalize, iv) { - var i, sourceLength = data.length; - var buffer = this.buffer, bufferLength = this.bufferPosition; - // if not supplied an IV wait for IV values - // they are at the start of the stream - if (iv) { - this.iv = iv; - } else { - for (i = 0; bufferLength < 16 && - i < sourceLength; ++i, ++bufferLength) { - buffer[bufferLength] = data[i]; - } - if (bufferLength < 16) { - //need more data - this.bufferLength = bufferLength; - return new Uint8Array([]); - } - this.iv = buffer; - data = data.subarray(16); + beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, + matrix) { + this.save(); + + if (isArray(rect) && 4 === rect.length) { + var width = rect[2] - rect[0]; + var height = rect[3] - rect[1]; + this.ctx.rect(rect[0], rect[1], width, height); + this.clip(); + this.endPath(); } - this.buffer = new Uint8Array(16); - this.bufferLength = 0; - // starting decryption - this.decryptBlock = decryptBlock2; - return this.decryptBlock(data, finalize); + + this.transform.apply(this, transform); + this.transform.apply(this, matrix); }, - encrypt: function AES256Cipher_encrypt(data, iv) { - var i, j, ii, sourceLength = data.length, - buffer = this.buffer, bufferLength = this.bufferPosition, - result = []; - if (!iv) { - iv = new Uint8Array(16); + + endAnnotation: function CanvasGraphics_endAnnotation() { + this.restore(); + }, + + paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { + var domImage = this.objs.get(objId); + if (!domImage) { + warn('Dependent image isn\'t ready yet'); + return; } - for (i = 0; i < sourceLength; ++i) { - buffer[bufferLength] = data[i]; - ++bufferLength; - if (bufferLength < 16) { - continue; - } - for (j = 0; j < 16; ++j) { - buffer[j] ^= iv[j]; - } - // buffer is full, encrypting - var cipher = encrypt256(buffer, this.key); - this.iv = cipher; - result.push(cipher); - buffer = new Uint8Array(16); - bufferLength = 0; + this.save(); + + var ctx = this.ctx; + // scale the image to the unit square + ctx.scale(1 / w, -1 / h); + + ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, + 0, -h, w, h); + if (this.imageLayer) { + var currentTransform = ctx.mozCurrentTransformInverse; + var position = this.getCanvasPosition(0, 0); + this.imageLayer.appendImage({ + objId: objId, + left: position[0], + top: position[1], + width: w / currentTransform[0], + height: h / currentTransform[3] + }); } - // saving incomplete buffer - this.buffer = buffer; - this.bufferLength = bufferLength; - this.iv = iv; - if (result.length === 0) { - return new Uint8Array([]); + this.restore(); + }, + + paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { + var ctx = this.ctx; + var width = img.width, height = img.height; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + + var glyph = this.processingType3; + + if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) { + if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { + glyph.compiled = + compileType3Glyph({data: img.data, width: width, height: height}); + } else { + glyph.compiled = null; + } } - // combining plain text blocks into one - var outputLength = 16 * result.length; - var output = new Uint8Array(outputLength); - for (i = 0, j = 0, ii = result.length; i < ii; ++i, j += 16) { - output.set(result[i], j); + + if (glyph && glyph.compiled) { + glyph.compiled(ctx); + return; } - return output; - } - }; - return AES256Cipher; -})(); + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); -var PDF17 = (function PDF17Closure() { + putBinaryImageMask(maskCtx, img); - function compareByteArrays(array1, array2) { - if (array1.length !== array2.length) { - return false; - } - for (var i = 0; i < array1.length; i++) { - if (array1[i] !== array2[i]) { - return false; + maskCtx.globalCompositeOperation = 'source-in'; + + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + this.paintInlineImageXObject(maskCanvas.canvas); + }, + + paintImageMaskXObjectRepeat: + function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, + scaleY, positions) { + var width = imgData.width; + var height = imgData.height; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); + + putBinaryImageMask(maskCtx, imgData); + + maskCtx.globalCompositeOperation = 'source-in'; + + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + var ctx = this.ctx; + for (var i = 0, ii = positions.length; i < ii; i += 2) { + ctx.save(); + ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); } - } - return true; - } + }, - function PDF17() { - } + paintImageMaskXObjectGroup: + function CanvasGraphics_paintImageMaskXObjectGroup(images) { + var ctx = this.ctx; - PDF17.prototype = { - checkOwnerPassword: function PDF17_checkOwnerPassword(password, - ownerValidationSalt, - userBytes, - ownerPassword) { - var hashData = new Uint8Array(password.length + 56); - hashData.set(password, 0); - hashData.set(ownerValidationSalt, password.length); - hashData.set(userBytes, password.length + ownerValidationSalt.length); - var result = calculateSHA256(hashData, 0, hashData.length); - return compareByteArrays(result, ownerPassword); + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + for (var i = 0, ii = images.length; i < ii; i++) { + var image = images[i]; + var width = image.width, height = image.height; + + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); + + putBinaryImageMask(maskCtx, image); + + maskCtx.globalCompositeOperation = 'source-in'; + + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + ctx.save(); + ctx.transform.apply(ctx, image.transform); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); + } }, - checkUserPassword: function PDF17_checkUserPassword(password, - userValidationSalt, - userPassword) { - var hashData = new Uint8Array(password.length + 8); - hashData.set(password, 0); - hashData.set(userValidationSalt, password.length); - var result = calculateSHA256(hashData, 0, hashData.length); - return compareByteArrays(result, userPassword); + + paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; + } + + this.paintInlineImageXObject(imgData); }, - getOwnerKey: function PDF17_getOwnerKey(password, ownerKeySalt, userBytes, - ownerEncryption) { - var hashData = new Uint8Array(password.length + 56); - hashData.set(password, 0); - hashData.set(ownerKeySalt, password.length); - hashData.set(userBytes, password.length + ownerKeySalt.length); - var key = calculateSHA256(hashData, 0, hashData.length); - var cipher = new AES256Cipher(key); - return cipher.decryptBlock(ownerEncryption, - false, - new Uint8Array(16)); + paintImageXObjectRepeat: + function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, + positions) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; + } + + var width = imgData.width; + var height = imgData.height; + var map = []; + for (var i = 0, ii = positions.length; i < ii; i += 2) { + map.push({transform: [scaleX, 0, 0, scaleY, positions[i], + positions[i + 1]], x: 0, y: 0, w: width, h: height}); + } + this.paintInlineImageXObjectGroup(imgData, map); }, - getUserKey: function PDF17_getUserKey(password, userKeySalt, - userEncryption) { - var hashData = new Uint8Array(password.length + 8); - hashData.set(password, 0); - hashData.set(userKeySalt, password.length); - //key is the decryption key for the UE string - var key = calculateSHA256(hashData, 0, hashData.length); - var cipher = new AES256Cipher(key); - return cipher.decryptBlock(userEncryption, - false, - new Uint8Array(16)); - } - }; - return PDF17; -})(); -var PDF20 = (function PDF20Closure() { + paintInlineImageXObject: + function CanvasGraphics_paintInlineImageXObject(imgData) { + var width = imgData.width; + var height = imgData.height; + var ctx = this.ctx; + + this.save(); + // scale the image to the unit square + ctx.scale(1 / width, -1 / height); + + var currentTransform = ctx.mozCurrentTransformInverse; + var a = currentTransform[0], b = currentTransform[1]; + var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); + var c = currentTransform[2], d = currentTransform[3]; + var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); + + var imgToPaint, tmpCanvas; + // instanceof HTMLElement does not work in jsdom node.js module + if (imgData instanceof HTMLElement || !imgData.data) { + imgToPaint = imgData; + } else { + tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', + width, height); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); + imgToPaint = tmpCanvas.canvas; + } + + var paintWidth = width, paintHeight = height; + var tmpCanvasId = 'prescale1'; + // Vertial or horizontal scaling shall not be more than 2 to not loose the + // pixels during drawImage operation, painting on the temporary canvas(es) + // that are twice smaller in size + while ((widthScale > 2 && paintWidth > 1) || + (heightScale > 2 && paintHeight > 1)) { + var newWidth = paintWidth, newHeight = paintHeight; + if (widthScale > 2 && paintWidth > 1) { + newWidth = Math.ceil(paintWidth / 2); + widthScale /= paintWidth / newWidth; + } + if (heightScale > 2 && paintHeight > 1) { + newHeight = Math.ceil(paintHeight / 2); + heightScale /= paintHeight / newHeight; + } + tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, + newWidth, newHeight); + tmpCtx = tmpCanvas.context; + tmpCtx.clearRect(0, 0, newWidth, newHeight); + tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, 0, newWidth, newHeight); + imgToPaint = tmpCanvas.canvas; + paintWidth = newWidth; + paintHeight = newHeight; + tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; + } + ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, -height, width, height); + + if (this.imageLayer) { + var position = this.getCanvasPosition(0, -height); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: width / currentTransform[0], + height: height / currentTransform[3] + }); + } + this.restore(); + }, - function concatArrays(array1, array2) { - var t = new Uint8Array(array1.length + array2.length); - t.set(array1, 0); - t.set(array2, array1.length); - return t; - } + paintInlineImageXObjectGroup: + function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { + var ctx = this.ctx; + var w = imgData.width; + var h = imgData.height; - function calculatePDF20Hash(password, input, userBytes) { - //This refers to Algorithm 2.B as defined in ISO 32000-2 - var k = calculateSHA256(input, 0, input.length).subarray(0, 32); - var e = [0]; - var i = 0; - while (i < 64 || e[e.length - 1] > i - 32) { - var arrayLength = password.length + k.length + userBytes.length; + var tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', w, h); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); - var k1 = new Uint8Array(arrayLength * 64); - var array = concatArrays(password, k); - array = concatArrays(array, userBytes); - for (var j = 0, pos = 0; j < 64; j++, pos += arrayLength) { - k1.set(array, pos); - } - //AES128 CBC NO PADDING with - //first 16 bytes of k as the key and the second 16 as the iv. - var cipher = new AES128Cipher(k.subarray(0, 16)); - e = cipher.encrypt(k1, k.subarray(16, 32)); - //Now we have to take the first 16 bytes of an unsigned - //big endian integer... and compute the remainder - //modulo 3.... That is a fairly large number and - //JavaScript isn't going to handle that well... - //So we're using a trick that allows us to perform - //modulo math byte by byte - var remainder = 0; - for (var z = 0; z < 16; z++) { - remainder *= (256 % 3); - remainder %= 3; - remainder += ((e[z] >>> 0) % 3); - remainder %= 3; - } - if (remainder === 0) { - k = calculateSHA256(e, 0, e.length); - } - else if (remainder === 1) { - k = calculateSHA384(e, 0, e.length); - } - else if (remainder === 2) { - k = calculateSHA512(e, 0, e.length); + for (var i = 0, ii = map.length; i < ii; i++) { + var entry = map[i]; + ctx.save(); + ctx.transform.apply(ctx, entry.transform); + ctx.scale(1, -1); + ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, + 0, -1, 1, 1); + if (this.imageLayer) { + var position = this.getCanvasPosition(entry.x, entry.y); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: w, + height: h + }); + } + ctx.restore(); } - i++; - } - return k.subarray(0, 32); - } + }, - function PDF20() { - } + paintSolidColorImageMask: + function CanvasGraphics_paintSolidColorImageMask() { + this.ctx.fillRect(0, 0, 1, 1); + }, - function compareByteArrays(array1, array2) { - if (array1.length !== array2.length) { - return false; - } - for (var i = 0; i < array1.length; i++) { - if (array1[i] !== array2[i]) { - return false; - } - } - return true; - } + paintXObject: function CanvasGraphics_paintXObject() { + warn('Unsupported \'paintXObject\' command.'); + }, - PDF20.prototype = { - hash: function PDF20_hash(password, concatBytes, userBytes) { - return calculatePDF20Hash(password, concatBytes, userBytes); + // Marked content + + markPoint: function CanvasGraphics_markPoint(tag) { + // TODO Marked content. }, - checkOwnerPassword: function PDF20_checkOwnerPassword(password, - ownerValidationSalt, - userBytes, - ownerPassword) { - var hashData = new Uint8Array(password.length + 56); - hashData.set(password, 0); - hashData.set(ownerValidationSalt, password.length); - hashData.set(userBytes, password.length + ownerValidationSalt.length); - var result = calculatePDF20Hash(password, hashData, userBytes); - return compareByteArrays(result, ownerPassword); + markPointProps: function CanvasGraphics_markPointProps(tag, properties) { + // TODO Marked content. }, - checkUserPassword: function PDF20_checkUserPassword(password, - userValidationSalt, - userPassword) { - var hashData = new Uint8Array(password.length + 8); - hashData.set(password, 0); - hashData.set(userValidationSalt, password.length); - var result = calculatePDF20Hash(password, hashData, []); - return compareByteArrays(result, userPassword); + beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { + // TODO Marked content. }, - getOwnerKey: function PDF20_getOwnerKey(password, ownerKeySalt, userBytes, - ownerEncryption) { - var hashData = new Uint8Array(password.length + 56); - hashData.set(password, 0); - hashData.set(ownerKeySalt, password.length); - hashData.set(userBytes, password.length + ownerKeySalt.length); - var key = calculatePDF20Hash(password, hashData, userBytes); - var cipher = new AES256Cipher(key); - return cipher.decryptBlock(ownerEncryption, - false, - new Uint8Array(16)); + beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( + tag, properties) { + // TODO Marked content. + }, + endMarkedContent: function CanvasGraphics_endMarkedContent() { + // TODO Marked content. + }, + + // Compatibility + beginCompat: function CanvasGraphics_beginCompat() { + // TODO ignore undefined operators (should we do that anyway?) + }, + endCompat: function CanvasGraphics_endCompat() { + // TODO stop ignoring undefined operators }, - getUserKey: function PDF20_getUserKey(password, userKeySalt, - userEncryption) { - var hashData = new Uint8Array(password.length + 8); - hashData.set(password, 0); - hashData.set(userKeySalt, password.length); - //key is the decryption key for the UE string - var key = calculatePDF20Hash(password, hashData, []); - var cipher = new AES256Cipher(key); - return cipher.decryptBlock(userEncryption, - false, - new Uint8Array(16)); - } - }; - return PDF20; -})(); -var CipherTransform = (function CipherTransformClosure() { - function CipherTransform(stringCipherConstructor, streamCipherConstructor) { - this.stringCipherConstructor = stringCipherConstructor; - this.streamCipherConstructor = streamCipherConstructor; - } + // Helper functions - CipherTransform.prototype = { - createStream: function CipherTransform_createStream(stream, length) { - var cipher = new this.streamCipherConstructor(); - return new DecryptStream(stream, length, - function cipherTransformDecryptStream(data, finalize) { - return cipher.decryptBlock(data, finalize); + consumePath: function CanvasGraphics_consumePath() { + var ctx = this.ctx; + if (this.pendingClip) { + if (this.pendingClip === EO_CLIP) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.clip(); + ctx.mozFillRule = 'nonzero'; + } else { + ctx.clip('evenodd'); + } + } else { + ctx.clip(); } - ); + this.pendingClip = null; + } + ctx.beginPath(); }, - decryptString: function CipherTransform_decryptString(s) { - var cipher = new this.stringCipherConstructor(); - var data = stringToBytes(s); - data = cipher.decryptBlock(data, true); - return bytesToString(data); + getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { + if (this.cachedGetSinglePixelWidth === null) { + var inverse = this.ctx.mozCurrentTransformInverse; + // max of the current horizontal and vertical scale + this.cachedGetSinglePixelWidth = Math.sqrt(Math.max( + (inverse[0] * inverse[0] + inverse[1] * inverse[1]), + (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); + } + return this.cachedGetSinglePixelWidth; + }, + getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { + var transform = this.ctx.mozCurrentTransform; + return [ + transform[0] * x + transform[2] * y + transform[4], + transform[1] * x + transform[3] * y + transform[5] + ]; } }; - return CipherTransform; -})(); -var CipherTransformFactory = (function CipherTransformFactoryClosure() { - var defaultPasswordBytes = new Uint8Array([ - 0x28, 0xBF, 0x4E, 0x5E, 0x4E, 0x75, 0x8A, 0x41, - 0x64, 0x00, 0x4E, 0x56, 0xFF, 0xFA, 0x01, 0x08, - 0x2E, 0x2E, 0x00, 0xB6, 0xD0, 0x68, 0x3E, 0x80, - 0x2F, 0x0C, 0xA9, 0xFE, 0x64, 0x53, 0x69, 0x7A]); + for (var op in OPS) { + CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; + } - function createEncryptionKey20(revision, password, ownerPassword, - ownerValidationSalt, ownerKeySalt, uBytes, - userPassword, userValidationSalt, userKeySalt, - ownerEncryption, userEncryption, perms) { - if (password) { - var passwordLength = Math.min(127, password.length); - password = password.subarray(0, passwordLength); - } else { - password = []; - } - var pdfAlgorithm; - if (revision === 6) { - pdfAlgorithm = new PDF20(); - } else { - pdfAlgorithm = new PDF17(); - } + return CanvasGraphics; +})(); - if (pdfAlgorithm) { - if (pdfAlgorithm.checkUserPassword(password, userValidationSalt, - userPassword)) { - return pdfAlgorithm.getUserKey(password, userKeySalt, userEncryption); - } else if (password.length && pdfAlgorithm.checkOwnerPassword(password, - ownerValidationSalt, - uBytes, - ownerPassword)) { - return pdfAlgorithm.getOwnerKey(password, ownerKeySalt, uBytes, - ownerEncryption); - } - } +exports.CanvasGraphics = CanvasGraphics; +exports.createScratchCanvas = createScratchCanvas; +})); - return null; + +(function (root, factory) { + { + factory((root.pdfjsCoreCMap = {}), root.pdfjsSharedUtil, + root.pdfjsCorePrimitives, root.pdfjsCoreStream, root.pdfjsCoreParser); } +}(this, function (exports, sharedUtil, corePrimitives, coreStream, coreParser) { - function prepareKeyData(fileId, password, ownerPassword, userPassword, - flags, revision, keyLength, encryptMetadata) { - var hashDataSize = 40 + ownerPassword.length + fileId.length; - var hashData = new Uint8Array(hashDataSize), i = 0, j, n; - if (password) { - n = Math.min(32, password.length); - for (; i < n; ++i) { - hashData[i] = password[i]; - } - } - j = 0; - while (i < 32) { - hashData[i++] = defaultPasswordBytes[j++]; - } - // as now the padded password in the hashData[0..i] - for (j = 0, n = ownerPassword.length; j < n; ++j) { - hashData[i++] = ownerPassword[j]; - } - hashData[i++] = flags & 0xFF; - hashData[i++] = (flags >> 8) & 0xFF; - hashData[i++] = (flags >> 16) & 0xFF; - hashData[i++] = (flags >>> 24) & 0xFF; - for (j = 0, n = fileId.length; j < n; ++j) { - hashData[i++] = fileId[j]; - } - if (revision >= 4 && !encryptMetadata) { - hashData[i++] = 0xFF; - hashData[i++] = 0xFF; - hashData[i++] = 0xFF; - hashData[i++] = 0xFF; - } - var hash = calculateMD5(hashData, 0, i); - var keyLengthInBytes = keyLength >> 3; - if (revision >= 3) { - for (j = 0; j < 50; ++j) { - hash = calculateMD5(hash, 0, keyLengthInBytes); - } - } - var encryptionKey = hash.subarray(0, keyLengthInBytes); - var cipher, checkData; +var Util = sharedUtil.Util; +var assert = sharedUtil.assert; +var error = sharedUtil.error; +var isInt = sharedUtil.isInt; +var isString = sharedUtil.isString; +var warn = sharedUtil.warn; +var isName = corePrimitives.isName; +var isCmd = corePrimitives.isCmd; +var isStream = corePrimitives.isStream; +var StringStream = coreStream.StringStream; +var Lexer = coreParser.Lexer; +var isEOF = coreParser.isEOF; + +var BUILT_IN_CMAPS = [ +// << Start unicode maps. +'Adobe-GB1-UCS2', +'Adobe-CNS1-UCS2', +'Adobe-Japan1-UCS2', +'Adobe-Korea1-UCS2', +// >> End unicode maps. +'78-EUC-H', +'78-EUC-V', +'78-H', +'78-RKSJ-H', +'78-RKSJ-V', +'78-V', +'78ms-RKSJ-H', +'78ms-RKSJ-V', +'83pv-RKSJ-H', +'90ms-RKSJ-H', +'90ms-RKSJ-V', +'90msp-RKSJ-H', +'90msp-RKSJ-V', +'90pv-RKSJ-H', +'90pv-RKSJ-V', +'Add-H', +'Add-RKSJ-H', +'Add-RKSJ-V', +'Add-V', +'Adobe-CNS1-0', +'Adobe-CNS1-1', +'Adobe-CNS1-2', +'Adobe-CNS1-3', +'Adobe-CNS1-4', +'Adobe-CNS1-5', +'Adobe-CNS1-6', +'Adobe-GB1-0', +'Adobe-GB1-1', +'Adobe-GB1-2', +'Adobe-GB1-3', +'Adobe-GB1-4', +'Adobe-GB1-5', +'Adobe-Japan1-0', +'Adobe-Japan1-1', +'Adobe-Japan1-2', +'Adobe-Japan1-3', +'Adobe-Japan1-4', +'Adobe-Japan1-5', +'Adobe-Japan1-6', +'Adobe-Korea1-0', +'Adobe-Korea1-1', +'Adobe-Korea1-2', +'B5-H', +'B5-V', +'B5pc-H', +'B5pc-V', +'CNS-EUC-H', +'CNS-EUC-V', +'CNS1-H', +'CNS1-V', +'CNS2-H', +'CNS2-V', +'ETHK-B5-H', +'ETHK-B5-V', +'ETen-B5-H', +'ETen-B5-V', +'ETenms-B5-H', +'ETenms-B5-V', +'EUC-H', +'EUC-V', +'Ext-H', +'Ext-RKSJ-H', +'Ext-RKSJ-V', +'Ext-V', +'GB-EUC-H', +'GB-EUC-V', +'GB-H', +'GB-V', +'GBK-EUC-H', +'GBK-EUC-V', +'GBK2K-H', +'GBK2K-V', +'GBKp-EUC-H', +'GBKp-EUC-V', +'GBT-EUC-H', +'GBT-EUC-V', +'GBT-H', +'GBT-V', +'GBTpc-EUC-H', +'GBTpc-EUC-V', +'GBpc-EUC-H', +'GBpc-EUC-V', +'H', +'HKdla-B5-H', +'HKdla-B5-V', +'HKdlb-B5-H', +'HKdlb-B5-V', +'HKgccs-B5-H', +'HKgccs-B5-V', +'HKm314-B5-H', +'HKm314-B5-V', +'HKm471-B5-H', +'HKm471-B5-V', +'HKscs-B5-H', +'HKscs-B5-V', +'Hankaku', +'Hiragana', +'KSC-EUC-H', +'KSC-EUC-V', +'KSC-H', +'KSC-Johab-H', +'KSC-Johab-V', +'KSC-V', +'KSCms-UHC-H', +'KSCms-UHC-HW-H', +'KSCms-UHC-HW-V', +'KSCms-UHC-V', +'KSCpc-EUC-H', +'KSCpc-EUC-V', +'Katakana', +'NWP-H', +'NWP-V', +'RKSJ-H', +'RKSJ-V', +'Roman', +'UniCNS-UCS2-H', +'UniCNS-UCS2-V', +'UniCNS-UTF16-H', +'UniCNS-UTF16-V', +'UniCNS-UTF32-H', +'UniCNS-UTF32-V', +'UniCNS-UTF8-H', +'UniCNS-UTF8-V', +'UniGB-UCS2-H', +'UniGB-UCS2-V', +'UniGB-UTF16-H', +'UniGB-UTF16-V', +'UniGB-UTF32-H', +'UniGB-UTF32-V', +'UniGB-UTF8-H', +'UniGB-UTF8-V', +'UniJIS-UCS2-H', +'UniJIS-UCS2-HW-H', +'UniJIS-UCS2-HW-V', +'UniJIS-UCS2-V', +'UniJIS-UTF16-H', +'UniJIS-UTF16-V', +'UniJIS-UTF32-H', +'UniJIS-UTF32-V', +'UniJIS-UTF8-H', +'UniJIS-UTF8-V', +'UniJIS2004-UTF16-H', +'UniJIS2004-UTF16-V', +'UniJIS2004-UTF32-H', +'UniJIS2004-UTF32-V', +'UniJIS2004-UTF8-H', +'UniJIS2004-UTF8-V', +'UniJISPro-UCS2-HW-V', +'UniJISPro-UCS2-V', +'UniJISPro-UTF8-V', +'UniJISX0213-UTF32-H', +'UniJISX0213-UTF32-V', +'UniJISX02132004-UTF32-H', +'UniJISX02132004-UTF32-V', +'UniKS-UCS2-H', +'UniKS-UCS2-V', +'UniKS-UTF16-H', +'UniKS-UTF16-V', +'UniKS-UTF32-H', +'UniKS-UTF32-V', +'UniKS-UTF8-H', +'UniKS-UTF8-V', +'V', +'WP-Symbol']; + +// CMap, not to be confused with TrueType's cmap. +var CMap = (function CMapClosure() { + function CMap(builtInCMap) { + // Codespace ranges are stored as follows: + // [[1BytePairs], [2BytePairs], [3BytePairs], [4BytePairs]] + // where nBytePairs are ranges e.g. [low1, high1, low2, high2, ...] + this.codespaceRanges = [[], [], [], []]; + this.numCodespaceRanges = 0; + // Map entries have one of two forms. + // - cid chars are 16-bit unsigned integers, stored as integers. + // - bf chars are variable-length byte sequences, stored as strings, with + // one byte per character. + this._map = []; + this.name = ''; + this.vertical = false; + this.useCMap = null; + this.builtInCMap = builtInCMap; + } + CMap.prototype = { + addCodespaceRange: function(n, low, high) { + this.codespaceRanges[n - 1].push(low, high); + this.numCodespaceRanges++; + }, - if (revision >= 3) { - for (i = 0; i < 32; ++i) { - hashData[i] = defaultPasswordBytes[i]; - } - for (j = 0, n = fileId.length; j < n; ++j) { - hashData[i++] = fileId[j]; - } - cipher = new ARCFourCipher(encryptionKey); - checkData = cipher.encryptBlock(calculateMD5(hashData, 0, i)); - n = encryptionKey.length; - var derivedKey = new Uint8Array(n), k; - for (j = 1; j <= 19; ++j) { - for (k = 0; k < n; ++k) { - derivedKey[k] = encryptionKey[k] ^ j; - } - cipher = new ARCFourCipher(derivedKey); - checkData = cipher.encryptBlock(checkData); - } - for (j = 0, n = checkData.length; j < n; ++j) { - if (userPassword[j] !== checkData[j]) { - return null; - } + mapCidRange: function(low, high, dstLow) { + while (low <= high) { + this._map[low++] = dstLow++; } - } else { - cipher = new ARCFourCipher(encryptionKey); - checkData = cipher.encryptBlock(defaultPasswordBytes); - for (j = 0, n = checkData.length; j < n; ++j) { - if (userPassword[j] !== checkData[j]) { - return null; - } + }, + + mapBfRange: function(low, high, dstLow) { + var lastByte = dstLow.length - 1; + while (low <= high) { + this._map[low++] = dstLow; + // Only the last byte has to be incremented. + dstLow = dstLow.substr(0, lastByte) + + String.fromCharCode(dstLow.charCodeAt(lastByte) + 1); } - } - return encryptionKey; - } + }, - function decodeUserPassword(password, ownerPassword, revision, keyLength) { - var hashData = new Uint8Array(32), i = 0, j, n; - n = Math.min(32, password.length); - for (; i < n; ++i) { - hashData[i] = password[i]; - } - j = 0; - while (i < 32) { - hashData[i++] = defaultPasswordBytes[j++]; - } - var hash = calculateMD5(hashData, 0, i); - var keyLengthInBytes = keyLength >> 3; - if (revision >= 3) { - for (j = 0; j < 50; ++j) { - hash = calculateMD5(hash, 0, hash.length); + mapBfRangeToArray: function(low, high, array) { + var i = 0, ii = array.length; + while (low <= high && i < ii) { + this._map[low] = array[i++]; + ++low; } - } + }, - var cipher, userPassword; - if (revision >= 3) { - userPassword = ownerPassword; - var derivedKey = new Uint8Array(keyLengthInBytes), k; - for (j = 19; j >= 0; j--) { - for (k = 0; k < keyLengthInBytes; ++k) { - derivedKey[k] = hash[k] ^ j; + // This is used for both bf and cid chars. + mapOne: function(src, dst) { + this._map[src] = dst; + }, + + lookup: function(code) { + return this._map[code]; + }, + + contains: function(code) { + return this._map[code] !== undefined; + }, + + forEach: function(callback) { + // Most maps have fewer than 65536 entries, and for those we use normal + // array iteration. But really sparse tables are possible -- e.g. with + // indices in the *billions*. For such tables we use for..in, which isn't + // ideal because it stringifies the indices for all present elements, but + // it does avoid iterating over every undefined entry. + var map = this._map; + var length = map.length; + var i; + if (length <= 0x10000) { + for (i = 0; i < length; i++) { + if (map[i] !== undefined) { + callback(i, map[i]); + } + } + } else { + for (i in this._map) { + callback(i, map[i]); } - cipher = new ARCFourCipher(derivedKey); - userPassword = cipher.encryptBlock(userPassword); } - } else { - cipher = new ARCFourCipher(hash.subarray(0, keyLengthInBytes)); - userPassword = cipher.encryptBlock(ownerPassword); - } - return userPassword; - } + }, - var identityName = Name.get('Identity'); + charCodeOf: function(value) { + return this._map.indexOf(value); + }, - function CipherTransformFactory(dict, fileId, password) { - var filter = dict.get('Filter'); - if (!isName(filter) || filter.name !== 'Standard') { - error('unknown encryption method'); - } - this.dict = dict; - var algorithm = dict.get('V'); - if (!isInt(algorithm) || - (algorithm !== 1 && algorithm !== 2 && algorithm !== 4 && - algorithm !== 5)) { - error('unsupported encryption algorithm'); - } - this.algorithm = algorithm; - var keyLength = dict.get('Length'); - if (!keyLength) { - // Spec asks to rely on encryption dictionary's Length entry, however - // some PDFs don't have it. Trying to recover. - if (algorithm <= 3) { - // For 1 and 2 it's fixed to 40-bit, for 3 40-bit is a minimal value. - keyLength = 40; - } else { - // Trying to find default handler -- it usually has Length. - var cfDict = dict.get('CF'); - var streamCryptoName = dict.get('StmF'); - if (isDict(cfDict) && isName(streamCryptoName)) { - var handlerDict = cfDict.get(streamCryptoName.name); - keyLength = (handlerDict && handlerDict.get('Length')) || 128; - if (keyLength < 40) { - // Sometimes it's incorrect value of bits, generators specify bytes. - keyLength <<= 3; + getMap: function() { + return this._map; + }, + + readCharCode: function(str, offset, out) { + var c = 0; + var codespaceRanges = this.codespaceRanges; + var codespaceRangesLen = this.codespaceRanges.length; + // 9.7.6.2 CMap Mapping + // The code length is at most 4. + for (var n = 0; n < codespaceRangesLen; n++) { + c = ((c << 8) | str.charCodeAt(offset + n)) >>> 0; + // Check each codespace range to see if it falls within. + var codespaceRange = codespaceRanges[n]; + for (var k = 0, kk = codespaceRange.length; k < kk;) { + var low = codespaceRange[k++]; + var high = codespaceRange[k++]; + if (c >= low && c <= high) { + out.charcode = c; + out.length = n + 1; + return; } } } - } - if (!isInt(keyLength) || - keyLength < 40 || (keyLength % 8) !== 0) { - error('invalid key length'); - } + out.charcode = 0; + out.length = 1; + }, - // prepare keys - var ownerPassword = stringToBytes(dict.get('O')).subarray(0, 32); - var userPassword = stringToBytes(dict.get('U')).subarray(0, 32); - var flags = dict.get('P'); - var revision = dict.get('R'); - // meaningful when V is 4 or 5 - var encryptMetadata = ((algorithm === 4 || algorithm === 5) && - dict.get('EncryptMetadata') !== false); - this.encryptMetadata = encryptMetadata; + get length() { + return this._map.length; + }, - var fileIdBytes = stringToBytes(fileId); - var passwordBytes; - if (password) { - if (revision === 6) { - try { - password = utf8StringToString(password); - } catch (ex) { - warn('CipherTransformFactory: ' + - 'Unable to convert UTF8 encoded password.'); + get isIdentityCMap() { + if (!(this.name === 'Identity-H' || this.name === 'Identity-V')) { + return false; + } + if (this._map.length !== 0x10000) { + return false; + } + for (var i = 0; i < 0x10000; i++) { + if (this._map[i] !== i) { + return false; } } - passwordBytes = stringToBytes(password); + return true; } + }; + return CMap; +})(); - var encryptionKey; - if (algorithm !== 5) { - encryptionKey = prepareKeyData(fileIdBytes, passwordBytes, - ownerPassword, userPassword, flags, - revision, keyLength, encryptMetadata); - } - else { - var ownerValidationSalt = stringToBytes(dict.get('O')).subarray(32, 40); - var ownerKeySalt = stringToBytes(dict.get('O')).subarray(40, 48); - var uBytes = stringToBytes(dict.get('U')).subarray(0, 48); - var userValidationSalt = stringToBytes(dict.get('U')).subarray(32, 40); - var userKeySalt = stringToBytes(dict.get('U')).subarray(40, 48); - var ownerEncryption = stringToBytes(dict.get('OE')); - var userEncryption = stringToBytes(dict.get('UE')); - var perms = stringToBytes(dict.get('Perms')); - encryptionKey = - createEncryptionKey20(revision, passwordBytes, - ownerPassword, ownerValidationSalt, - ownerKeySalt, uBytes, - userPassword, userValidationSalt, - userKeySalt, ownerEncryption, - userEncryption, perms); - } - if (!encryptionKey && !password) { - throw new PasswordException('No password given', - PasswordResponses.NEED_PASSWORD); - } else if (!encryptionKey && password) { - // Attempting use the password as an owner password - var decodedPassword = decodeUserPassword(passwordBytes, ownerPassword, - revision, keyLength); - encryptionKey = prepareKeyData(fileIdBytes, decodedPassword, - ownerPassword, userPassword, flags, - revision, keyLength, encryptMetadata); - } +// A special case of CMap, where the _map array implicitly has a length of +// 65536 and each element is equal to its index. +var IdentityCMap = (function IdentityCMapClosure() { + function IdentityCMap(vertical, n) { + CMap.call(this); + this.vertical = vertical; + this.addCodespaceRange(n, 0, 0xffff); + } + Util.inherit(IdentityCMap, CMap, {}); - if (!encryptionKey) { - throw new PasswordException('Incorrect Password', - PasswordResponses.INCORRECT_PASSWORD); - } + IdentityCMap.prototype = { + addCodespaceRange: CMap.prototype.addCodespaceRange, - this.encryptionKey = encryptionKey; + mapCidRange: function(low, high, dstLow) { + error('should not call mapCidRange'); + }, - if (algorithm >= 4) { - this.cf = dict.get('CF'); - this.stmf = dict.get('StmF') || identityName; - this.strf = dict.get('StrF') || identityName; - this.eff = dict.get('EFF') || this.stmf; - } - } + mapBfRange: function(low, high, dstLow) { + error('should not call mapBfRange'); + }, - function buildObjectKey(num, gen, encryptionKey, isAes) { - var key = new Uint8Array(encryptionKey.length + 9), i, n; - for (i = 0, n = encryptionKey.length; i < n; ++i) { - key[i] = encryptionKey[i]; - } - key[i++] = num & 0xFF; - key[i++] = (num >> 8) & 0xFF; - key[i++] = (num >> 16) & 0xFF; - key[i++] = gen & 0xFF; - key[i++] = (gen >> 8) & 0xFF; - if (isAes) { - key[i++] = 0x73; - key[i++] = 0x41; - key[i++] = 0x6C; - key[i++] = 0x54; - } - var hash = calculateMD5(key, 0, i); - return hash.subarray(0, Math.min(encryptionKey.length + 5, 16)); - } + mapBfRangeToArray: function(low, high, array) { + error('should not call mapBfRangeToArray'); + }, - function buildCipherConstructor(cf, name, num, gen, key) { - var cryptFilter = cf.get(name.name); - var cfm; - if (cryptFilter !== null && cryptFilter !== undefined) { - cfm = cryptFilter.get('CFM'); - } - if (!cfm || cfm.name === 'None') { - return function cipherTransformFactoryBuildCipherConstructorNone() { - return new NullCipher(); - }; - } - if ('V2' === cfm.name) { - return function cipherTransformFactoryBuildCipherConstructorV2() { - return new ARCFourCipher(buildObjectKey(num, gen, key, false)); - }; - } - if ('AESV2' === cfm.name) { - return function cipherTransformFactoryBuildCipherConstructorAESV2() { - return new AES128Cipher(buildObjectKey(num, gen, key, true)); - }; - } - if ('AESV3' === cfm.name) { - return function cipherTransformFactoryBuildCipherConstructorAESV3() { - return new AES256Cipher(key); - }; - } - error('Unknown crypto method'); - } + mapOne: function(src, dst) { + error('should not call mapCidOne'); + }, - CipherTransformFactory.prototype = { - createCipherTransform: - function CipherTransformFactory_createCipherTransform(num, gen) { - if (this.algorithm === 4 || this.algorithm === 5) { - return new CipherTransform( - buildCipherConstructor(this.cf, this.stmf, - num, gen, this.encryptionKey), - buildCipherConstructor(this.cf, this.strf, - num, gen, this.encryptionKey)); - } - // algorithms 1 and 2 - var key = buildObjectKey(num, gen, this.encryptionKey, false); - var cipherConstructor = function buildCipherCipherConstructor() { - return new ARCFourCipher(key); - }; - return new CipherTransform(cipherConstructor, cipherConstructor); - } - }; + lookup: function(code) { + return (isInt(code) && code <= 0xffff) ? code : undefined; + }, - return CipherTransformFactory; -})(); + contains: function(code) { + return isInt(code) && code <= 0xffff; + }, -exports.AES128Cipher = AES128Cipher; -exports.AES256Cipher = AES256Cipher; -exports.ARCFourCipher = ARCFourCipher; -exports.CipherTransformFactory = CipherTransformFactory; -exports.PDF17 = PDF17; -exports.PDF20 = PDF20; -exports.calculateMD5 = calculateMD5; -exports.calculateSHA256 = calculateSHA256; -exports.calculateSHA384 = calculateSHA384; -exports.calculateSHA512 = calculateSHA512; -})); + forEach: function(callback) { + for (var i = 0; i <= 0xffff; i++) { + callback(i, i); + } + }, -(function (root, factory) { - { - factory((root.pdfjsCoreFontRenderer = {}), root.pdfjsSharedUtil, - root.pdfjsCoreStream, root.pdfjsCoreGlyphList); - } -}(this, function (exports, sharedUtil, coreStream, coreGlyphList) { + charCodeOf: function(value) { + return (isInt(value) && value <= 0xffff) ? value : -1; + }, -var Util = sharedUtil.Util; -var bytesToString = sharedUtil.bytesToString; -var error = sharedUtil.error; -var Stream = coreStream.Stream; -var GlyphsUnicode = coreGlyphList.GlyphsUnicode; + getMap: function() { + // Sometimes identity maps must be instantiated, but it's rare. + var map = new Array(0x10000); + for (var i = 0; i <= 0xffff; i++) { + map[i] = i; + } + return map; + }, -var coreFonts; // see _setCoreFonts below -var CFFParser; // = coreFonts.CFFParser; -var Encodings; // = coreFonts.Encodings; + readCharCode: CMap.prototype.readCharCode, -var FontRendererFactory = (function FontRendererFactoryClosure() { - function getLong(data, offset) { - return (data[offset] << 24) | (data[offset + 1] << 16) | - (data[offset + 2] << 8) | data[offset + 3]; - } + get length() { + return 0x10000; + }, - function getUshort(data, offset) { - return (data[offset] << 8) | data[offset + 1]; - } + get isIdentityCMap() { + error('should not access .isIdentityCMap'); + } + }; - function parseCmap(data, start, end) { - var offset = (getUshort(data, start + 2) === 1 ? - getLong(data, start + 8) : getLong(data, start + 16)); - var format = getUshort(data, start + offset); - var length, ranges, p, i; - if (format === 4) { - length = getUshort(data, start + offset + 2); - var segCount = getUshort(data, start + offset + 6) >> 1; - p = start + offset + 14; - ranges = []; - for (i = 0; i < segCount; i++, p += 2) { - ranges[i] = {end: getUshort(data, p)}; - } - p += 2; - for (i = 0; i < segCount; i++, p += 2) { - ranges[i].start = getUshort(data, p); - } - for (i = 0; i < segCount; i++, p += 2) { - ranges[i].idDelta = getUshort(data, p); - } - for (i = 0; i < segCount; i++, p += 2) { - var idOffset = getUshort(data, p); - if (idOffset === 0) { - continue; - } - ranges[i].ids = []; - for (var j = 0, jj = ranges[i].end - ranges[i].start + 1; j < jj; j++) { - ranges[i].ids[j] = getUshort(data, p + idOffset); - idOffset += 2; - } - } - return ranges; - } else if (format === 12) { - length = getLong(data, start + offset + 4); - var groups = getLong(data, start + offset + 12); - p = start + offset + 16; - ranges = []; - for (i = 0; i < groups; i++) { - ranges.push({ - start: getLong(data, p), - end: getLong(data, p + 4), - idDelta: getLong(data, p + 8) - getLong(data, p) - }); - p += 12; + return IdentityCMap; +})(); + +var BinaryCMapReader = (function BinaryCMapReaderClosure() { + function fetchBinaryData(url) { + var nonBinaryRequest = PDFJS.disableWorker; + var request = new XMLHttpRequest(); + request.open('GET', url, false); + if (!nonBinaryRequest) { + try { + request.responseType = 'arraybuffer'; + nonBinaryRequest = request.responseType !== 'arraybuffer'; + } catch (e) { + nonBinaryRequest = true; } - return ranges; } - error('not supported cmap: ' + format); - } - - function parseCff(data, start, end) { - var properties = {}; - var parser = new CFFParser(new Stream(data, start, end - start), - properties); - var cff = parser.parse(); - return { - glyphs: cff.charStrings.objects, - subrs: (cff.topDict.privateDict && cff.topDict.privateDict.subrsIndex && - cff.topDict.privateDict.subrsIndex.objects), - gsubrs: cff.globalSubrIndex && cff.globalSubrIndex.objects - }; + if (nonBinaryRequest && request.overrideMimeType) { + request.overrideMimeType('text/plain; charset=x-user-defined'); + } + request.send(null); + if (nonBinaryRequest ? !request.responseText : !request.response) { + error('Unable to get binary cMap at: ' + url); + } + if (nonBinaryRequest) { + var data = Array.prototype.map.call(request.responseText, function (ch) { + return ch.charCodeAt(0) & 255; + }); + return new Uint8Array(data); + } + return new Uint8Array(request.response); } - function parseGlyfTable(glyf, loca, isGlyphLocationsLong) { - var itemSize, itemDecode; - if (isGlyphLocationsLong) { - itemSize = 4; - itemDecode = function fontItemDecodeLong(data, offset) { - return (data[offset] << 24) | (data[offset + 1] << 16) | - (data[offset + 2] << 8) | data[offset + 3]; - }; - } else { - itemSize = 2; - itemDecode = function fontItemDecode(data, offset) { - return (data[offset] << 9) | (data[offset + 1] << 1); - }; - } - var glyphs = []; - var startOffset = itemDecode(loca, 0); - for (var j = itemSize; j < loca.length; j += itemSize) { - var endOffset = itemDecode(loca, j); - glyphs.push(glyf.subarray(startOffset, endOffset)); - startOffset = endOffset; + function hexToInt(a, size) { + var n = 0; + for (var i = 0; i <= size; i++) { + n = (n << 8) | a[i]; } - return glyphs; + return n >>> 0; } - function lookupCmap(ranges, unicode) { - var code = unicode.charCodeAt(0); - var l = 0, r = ranges.length - 1; - while (l < r) { - var c = (l + r + 1) >> 1; - if (code < ranges[c].start) { - r = c - 1; - } else { - l = c; - } + function hexToStr(a, size) { + // This code is hot. Special-case some common values to avoid creating an + // object with subarray(). + if (size === 1) { + return String.fromCharCode(a[0], a[1]); } - if (ranges[l].start <= code && code <= ranges[l].end) { - return (ranges[l].idDelta + (ranges[l].ids ? - ranges[l].ids[code - ranges[l].start] : code)) & 0xFFFF; + if (size === 3) { + return String.fromCharCode(a[0], a[1], a[2], a[3]); } - return 0; + return String.fromCharCode.apply(null, a.subarray(0, size + 1)); } - function compileGlyf(code, cmds, font) { - function moveTo(x, y) { - cmds.push({cmd: 'moveTo', args: [x, y]}); - } - function lineTo(x, y) { - cmds.push({cmd: 'lineTo', args: [x, y]}); + function addHex(a, b, size) { + var c = 0; + for (var i = size; i >= 0; i--) { + c += a[i] + b[i]; + a[i] = c & 255; + c >>= 8; } - function quadraticCurveTo(xa, ya, x, y) { - cmds.push({cmd: 'quadraticCurveTo', args: [xa, ya, x, y]}); + } + + function incHex(a, size) { + var c = 1; + for (var i = size; i >= 0 && c > 0; i--) { + c += a[i]; + a[i] = c & 255; + c >>= 8; } + } - var i = 0; - var numberOfContours = ((code[i] << 24) | (code[i + 1] << 16)) >> 16; - var flags; - var x = 0, y = 0; - i += 10; - if (numberOfContours < 0) { - // composite glyph - do { - flags = (code[i] << 8) | code[i + 1]; - var glyphIndex = (code[i + 2] << 8) | code[i + 3]; - i += 4; - var arg1, arg2; - if ((flags & 0x01)) { - arg1 = ((code[i] << 24) | (code[i + 1] << 16)) >> 16; - arg2 = ((code[i + 2] << 24) | (code[i + 3] << 16)) >> 16; - i += 4; - } else { - arg1 = code[i++]; arg2 = code[i++]; - } - if ((flags & 0x02)) { - x = arg1; - y = arg2; - } else { - x = 0; y = 0; // TODO "they are points" ? - } - var scaleX = 1, scaleY = 1, scale01 = 0, scale10 = 0; - if ((flags & 0x08)) { - scaleX = - scaleY = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; - i += 2; - } else if ((flags & 0x40)) { - scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; - scaleY = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824; - i += 4; - } else if ((flags & 0x80)) { - scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824; - scale01 = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824; - scale10 = ((code[i + 4] << 24) | (code[i + 5] << 16)) / 1073741824; - scaleY = ((code[i + 6] << 24) | (code[i + 7] << 16)) / 1073741824; - i += 8; - } - var subglyph = font.glyphs[glyphIndex]; - if (subglyph) { - cmds.push({cmd: 'save'}); - cmds.push({cmd: 'transform', - args: [scaleX, scale01, scale10, scaleY, x, y]}); - compileGlyf(subglyph, cmds, font); - cmds.push({cmd: 'restore'}); - } - } while ((flags & 0x20)); - } else { - // simple glyph - var endPtsOfContours = []; - var j, jj; - for (j = 0; j < numberOfContours; j++) { - endPtsOfContours.push((code[i] << 8) | code[i + 1]); - i += 2; + var MAX_NUM_SIZE = 16; + var MAX_ENCODED_NUM_SIZE = 19; // ceil(MAX_NUM_SIZE * 7 / 8) + + function BinaryCMapStream(data) { + this.buffer = data; + this.pos = 0; + this.end = data.length; + this.tmpBuf = new Uint8Array(MAX_ENCODED_NUM_SIZE); + } + + BinaryCMapStream.prototype = { + readByte: function () { + if (this.pos >= this.end) { + return -1; } - var instructionLength = (code[i] << 8) | code[i + 1]; - i += 2 + instructionLength; // skipping the instructions - var numberOfPoints = endPtsOfContours[endPtsOfContours.length - 1] + 1; - var points = []; - while (points.length < numberOfPoints) { - flags = code[i++]; - var repeat = 1; - if ((flags & 0x08)) { - repeat += code[i++]; - } - while (repeat-- > 0) { - points.push({flags: flags}); + return this.buffer[this.pos++]; + }, + readNumber: function () { + var n = 0; + var last; + do { + var b = this.readByte(); + if (b < 0) { + error('unexpected EOF in bcmap'); } - } - for (j = 0; j < numberOfPoints; j++) { - switch (points[j].flags & 0x12) { - case 0x00: - x += ((code[i] << 24) | (code[i + 1] << 16)) >> 16; - i += 2; - break; - case 0x02: - x -= code[i++]; - break; - case 0x12: - x += code[i++]; - break; + last = !(b & 0x80); + n = (n << 7) | (b & 0x7F); + } while (!last); + return n; + }, + readSigned: function () { + var n = this.readNumber(); + return (n & 1) ? ~(n >>> 1) : n >>> 1; + }, + readHex: function (num, size) { + num.set(this.buffer.subarray(this.pos, + this.pos + size + 1)); + this.pos += size + 1; + }, + readHexNumber: function (num, size) { + var last; + var stack = this.tmpBuf, sp = 0; + do { + var b = this.readByte(); + if (b < 0) { + error('unexpected EOF in bcmap'); } - points[j].x = x; - } - for (j = 0; j < numberOfPoints; j++) { - switch (points[j].flags & 0x24) { - case 0x00: - y += ((code[i] << 24) | (code[i + 1] << 16)) >> 16; - i += 2; - break; - case 0x04: - y -= code[i++]; - break; - case 0x24: - y += code[i++]; - break; + last = !(b & 0x80); + stack[sp++] = b & 0x7F; + } while (!last); + var i = size, buffer = 0, bufferSize = 0; + while (i >= 0) { + while (bufferSize < 8 && stack.length > 0) { + buffer = (stack[--sp] << bufferSize) | buffer; + bufferSize += 7; } - points[j].y = y; + num[i] = buffer & 255; + i--; + buffer >>= 8; + bufferSize -= 8; } - - var startPoint = 0; - for (i = 0; i < numberOfContours; i++) { - var endPoint = endPtsOfContours[i]; - // contours might have implicit points, which is located in the middle - // between two neighboring off-curve points - var contour = points.slice(startPoint, endPoint + 1); - if ((contour[0].flags & 1)) { - contour.push(contour[0]); // using start point at the contour end - } else if ((contour[contour.length - 1].flags & 1)) { - // first is off-curve point, trying to use one from the end - contour.unshift(contour[contour.length - 1]); - } else { - // start and end are off-curve points, creating implicit one - var p = { - flags: 1, - x: (contour[0].x + contour[contour.length - 1].x) / 2, - y: (contour[0].y + contour[contour.length - 1].y) / 2 - }; - contour.unshift(p); - contour.push(p); - } - moveTo(contour[0].x, contour[0].y); - for (j = 1, jj = contour.length; j < jj; j++) { - if ((contour[j].flags & 1)) { - lineTo(contour[j].x, contour[j].y); - } else if ((contour[j + 1].flags & 1)){ - quadraticCurveTo(contour[j].x, contour[j].y, - contour[j + 1].x, contour[j + 1].y); - j++; - } else { - quadraticCurveTo(contour[j].x, contour[j].y, - (contour[j].x + contour[j + 1].x) / 2, - (contour[j].y + contour[j + 1].y) / 2); - } - } - startPoint = endPoint + 1; + }, + readHexSigned: function (num, size) { + this.readHexNumber(num, size); + var sign = num[size] & 1 ? 255 : 0; + var c = 0; + for (var i = 0; i <= size; i++) { + c = ((c & 1) << 8) | num[i]; + num[i] = (c >> 1) ^ sign; } - } - } - - function compileCharString(code, cmds, font) { - var stack = []; - var x = 0, y = 0; - var stems = 0; - - function moveTo(x, y) { - cmds.push({cmd: 'moveTo', args: [x, y]}); - } - function lineTo(x, y) { - cmds.push({cmd: 'lineTo', args: [x, y]}); - } - function bezierCurveTo(x1, y1, x2, y2, x, y) { - cmds.push({cmd: 'bezierCurveTo', args: [x1, y1, x2, y2, x, y]}); - } - - function parse(code) { - var i = 0; - while (i < code.length) { - var stackClean = false; - var v = code[i++]; - var xa, xb, ya, yb, y1, y2, y3, n, subrCode; - switch (v) { - case 1: // hstem - stems += stack.length >> 1; - stackClean = true; - break; - case 3: // vstem - stems += stack.length >> 1; - stackClean = true; - break; - case 4: // vmoveto - y += stack.pop(); - moveTo(x, y); - stackClean = true; - break; - case 5: // rlineto - while (stack.length > 0) { - x += stack.shift(); - y += stack.shift(); - lineTo(x, y); - } - break; - case 6: // hlineto - while (stack.length > 0) { - x += stack.shift(); - lineTo(x, y); - if (stack.length === 0) { - break; - } - y += stack.shift(); - lineTo(x, y); - } - break; - case 7: // vlineto - while (stack.length > 0) { - y += stack.shift(); - lineTo(x, y); - if (stack.length === 0) { - break; - } - x += stack.shift(); - lineTo(x, y); - } - break; - case 8: // rrcurveto - while (stack.length > 0) { - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - } - break; - case 10: // callsubr - n = stack.pop() + font.subrsBias; - subrCode = font.subrs[n]; - if (subrCode) { - parse(subrCode); - } - break; - case 11: // return - return; - case 12: - v = code[i++]; - switch (v) { - case 34: // flex - xa = x + stack.shift(); - xb = xa + stack.shift(); y1 = y + stack.shift(); - x = xb + stack.shift(); - bezierCurveTo(xa, y, xb, y1, x, y1); - xa = x + stack.shift(); - xb = xa + stack.shift(); - x = xb + stack.shift(); - bezierCurveTo(xa, y1, xb, y, x, y); - break; - case 35: // flex - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - stack.pop(); // fd - break; - case 36: // hflex1 - xa = x + stack.shift(); y1 = y + stack.shift(); - xb = xa + stack.shift(); y2 = y1 + stack.shift(); - x = xb + stack.shift(); - bezierCurveTo(xa, y1, xb, y2, x, y2); - xa = x + stack.shift(); - xb = xa + stack.shift(); y3 = y2 + stack.shift(); - x = xb + stack.shift(); - bezierCurveTo(xa, y2, xb, y3, x, y); - break; - case 37: // flex1 - var x0 = x, y0 = y; - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb; y = yb; - if (Math.abs(x - x0) > Math.abs(y - y0)) { - x += stack.shift(); - } else { - y += stack.shift(); - } - bezierCurveTo(xa, ya, xb, yb, x, y); - break; - default: - error('unknown operator: 12 ' + v); - } - break; - case 14: // endchar - if (stack.length >= 4) { - var achar = stack.pop(); - var bchar = stack.pop(); - y = stack.pop(); - x = stack.pop(); - cmds.push({cmd: 'save'}); - cmds.push({cmd: 'translate', args: [x, y]}); - var gid = lookupCmap(font.cmap, String.fromCharCode( - font.glyphNameMap[Encodings.StandardEncoding[achar]])); - compileCharString(font.glyphs[gid], cmds, font); - cmds.push({cmd: 'restore'}); - - gid = lookupCmap(font.cmap, String.fromCharCode( - font.glyphNameMap[Encodings.StandardEncoding[bchar]])); - compileCharString(font.glyphs[gid], cmds, font); - } - return; - case 18: // hstemhm - stems += stack.length >> 1; - stackClean = true; - break; - case 19: // hintmask - stems += stack.length >> 1; - i += (stems + 7) >> 3; - stackClean = true; - break; - case 20: // cntrmask - stems += stack.length >> 1; - i += (stems + 7) >> 3; - stackClean = true; - break; - case 21: // rmoveto - y += stack.pop(); - x += stack.pop(); - moveTo(x, y); - stackClean = true; - break; - case 22: // hmoveto - x += stack.pop(); - moveTo(x, y); - stackClean = true; - break; - case 23: // vstemhm - stems += stack.length >> 1; - stackClean = true; - break; - case 24: // rcurveline - while (stack.length > 2) { - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - } - x += stack.shift(); - y += stack.shift(); - lineTo(x, y); - break; - case 25: // rlinecurve - while (stack.length > 6) { - x += stack.shift(); - y += stack.shift(); - lineTo(x, y); - } - xa = x + stack.shift(); ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - break; - case 26: // vvcurveto - if (stack.length % 2) { - x += stack.shift(); - } - while (stack.length > 0) { - xa = x; ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb; y = yb + stack.shift(); - bezierCurveTo(xa, ya, xb, yb, x, y); - } - break; - case 27: // hhcurveto - if (stack.length % 2) { - y += stack.shift(); - } - while (stack.length > 0) { - xa = x + stack.shift(); ya = y; - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); y = yb; - bezierCurveTo(xa, ya, xb, yb, x, y); - } - break; - case 28: - stack.push(((code[i] << 24) | (code[i + 1] << 16)) >> 16); - i += 2; + }, + readString: function () { + var len = this.readNumber(); + var s = ''; + for (var i = 0; i < len; i++) { + s += String.fromCharCode(this.readNumber()); + } + return s; + } + }; + + function processBinaryCMap(url, cMap, extend) { + var data = fetchBinaryData(url); + var stream = new BinaryCMapStream(data); + + var header = stream.readByte(); + cMap.vertical = !!(header & 1); + + var useCMap = null; + var start = new Uint8Array(MAX_NUM_SIZE); + var end = new Uint8Array(MAX_NUM_SIZE); + var char = new Uint8Array(MAX_NUM_SIZE); + var charCode = new Uint8Array(MAX_NUM_SIZE); + var tmp = new Uint8Array(MAX_NUM_SIZE); + var code; + + var b; + while ((b = stream.readByte()) >= 0) { + var type = b >> 5; + if (type === 7) { // metadata, e.g. comment or usecmap + switch (b & 0x1F) { + case 0: + stream.readString(); // skipping comment break; - case 29: // callgsubr - n = stack.pop() + font.gsubrsBias; - subrCode = font.gsubrs[n]; - if (subrCode) { - parse(subrCode); - } + case 1: + useCMap = stream.readString(); break; - case 30: // vhcurveto - while (stack.length > 0) { - xa = x; ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); - y = yb + (stack.length === 1 ? stack.shift() : 0); - bezierCurveTo(xa, ya, xb, yb, x, y); - if (stack.length === 0) { - break; - } + } + continue; + } + var sequence = !!(b & 0x10); + var dataSize = b & 15; - xa = x + stack.shift(); ya = y; - xb = xa + stack.shift(); yb = ya + stack.shift(); - y = yb + stack.shift(); - x = xb + (stack.length === 1 ? stack.shift() : 0); - bezierCurveTo(xa, ya, xb, yb, x, y); - } - break; - case 31: // hvcurveto - while (stack.length > 0) { - xa = x + stack.shift(); ya = y; - xb = xa + stack.shift(); yb = ya + stack.shift(); - y = yb + stack.shift(); - x = xb + (stack.length === 1 ? stack.shift() : 0); - bezierCurveTo(xa, ya, xb, yb, x, y); - if (stack.length === 0) { - break; - } + assert(dataSize + 1 <= MAX_NUM_SIZE); - xa = x; ya = y + stack.shift(); - xb = xa + stack.shift(); yb = ya + stack.shift(); - x = xb + stack.shift(); - y = yb + (stack.length === 1 ? stack.shift() : 0); - bezierCurveTo(xa, ya, xb, yb, x, y); + var ucs2DataSize = 1; + var subitemsCount = stream.readNumber(); + var i; + switch (type) { + case 0: // codespacerange + stream.readHex(start, dataSize); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + cMap.addCodespaceRange(dataSize + 1, hexToInt(start, dataSize), + hexToInt(end, dataSize)); + for (i = 1; i < subitemsCount; i++) { + incHex(end, dataSize); + stream.readHexNumber(start, dataSize); + addHex(start, end, dataSize); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + cMap.addCodespaceRange(dataSize + 1, hexToInt(start, dataSize), + hexToInt(end, dataSize)); + } + break; + case 1: // notdefrange + stream.readHex(start, dataSize); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + code = stream.readNumber(); + // undefined range, skipping + for (i = 1; i < subitemsCount; i++) { + incHex(end, dataSize); + stream.readHexNumber(start, dataSize); + addHex(start, end, dataSize); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + code = stream.readNumber(); + // nop + } + break; + case 2: // cidchar + stream.readHex(char, dataSize); + code = stream.readNumber(); + cMap.mapOne(hexToInt(char, dataSize), code); + for (i = 1; i < subitemsCount; i++) { + incHex(char, dataSize); + if (!sequence) { + stream.readHexNumber(tmp, dataSize); + addHex(char, tmp, dataSize); } - break; - default: - if (v < 32) { - error('unknown operator: ' + v); + code = stream.readSigned() + (code + 1); + cMap.mapOne(hexToInt(char, dataSize), code); + } + break; + case 3: // cidrange + stream.readHex(start, dataSize); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + code = stream.readNumber(); + cMap.mapCidRange(hexToInt(start, dataSize), hexToInt(end, dataSize), + code); + for (i = 1; i < subitemsCount; i++) { + incHex(end, dataSize); + if (!sequence) { + stream.readHexNumber(start, dataSize); + addHex(start, end, dataSize); + } else { + start.set(end); } - if (v < 247) { - stack.push(v - 139); - } else if (v < 251) { - stack.push((v - 247) * 256 + code[i++] + 108); - } else if (v < 255) { - stack.push(-(v - 251) * 256 - code[i++] - 108); + stream.readHexNumber(end, dataSize); + addHex(end, start, dataSize); + code = stream.readNumber(); + cMap.mapCidRange(hexToInt(start, dataSize), hexToInt(end, dataSize), + code); + } + break; + case 4: // bfchar + stream.readHex(char, ucs2DataSize); + stream.readHex(charCode, dataSize); + cMap.mapOne(hexToInt(char, ucs2DataSize), + hexToStr(charCode, dataSize)); + for (i = 1; i < subitemsCount; i++) { + incHex(char, ucs2DataSize); + if (!sequence) { + stream.readHexNumber(tmp, ucs2DataSize); + addHex(char, tmp, ucs2DataSize); + } + incHex(charCode, dataSize); + stream.readHexSigned(tmp, dataSize); + addHex(charCode, tmp, dataSize); + cMap.mapOne(hexToInt(char, ucs2DataSize), + hexToStr(charCode, dataSize)); + } + break; + case 5: // bfrange + stream.readHex(start, ucs2DataSize); + stream.readHexNumber(end, ucs2DataSize); + addHex(end, start, ucs2DataSize); + stream.readHex(charCode, dataSize); + cMap.mapBfRange(hexToInt(start, ucs2DataSize), + hexToInt(end, ucs2DataSize), + hexToStr(charCode, dataSize)); + for (i = 1; i < subitemsCount; i++) { + incHex(end, ucs2DataSize); + if (!sequence) { + stream.readHexNumber(start, ucs2DataSize); + addHex(start, end, ucs2DataSize); } else { - stack.push(((code[i] << 24) | (code[i + 1] << 16) | - (code[i + 2] << 8) | code[i + 3]) / 65536); - i += 4; + start.set(end); } - break; - } - if (stackClean) { - stack.length = 0; - } + stream.readHexNumber(end, ucs2DataSize); + addHex(end, start, ucs2DataSize); + stream.readHex(charCode, dataSize); + cMap.mapBfRange(hexToInt(start, ucs2DataSize), + hexToInt(end, ucs2DataSize), + hexToStr(charCode, dataSize)); + } + break; + default: + error('Unknown type: ' + type); + break; } } - parse(code); + + if (useCMap) { + extend(useCMap); + } + return cMap; } - var noop = ''; + function BinaryCMapReader() {} - function CompiledFont(fontMatrix) { - this.compiledGlyphs = {}; - this.fontMatrix = fontMatrix; - } - CompiledFont.prototype = { - getPathJs: function (unicode) { - var gid = lookupCmap(this.cmap, unicode); - var fn = this.compiledGlyphs[gid]; - if (!fn) { - this.compiledGlyphs[gid] = fn = this.compileGlyph(this.glyphs[gid]); - } - return fn; - }, + BinaryCMapReader.prototype = { + read: processBinaryCMap + }; - compileGlyph: function (code) { - if (!code || code.length === 0 || code[0] === 14) { - return noop; - } + return BinaryCMapReader; +})(); - var cmds = []; - cmds.push({cmd: 'save'}); - cmds.push({cmd: 'transform', args: this.fontMatrix.slice()}); - cmds.push({cmd: 'scale', args: ['size', '-size']}); +var CMapFactory = (function CMapFactoryClosure() { + function strToInt(str) { + var a = 0; + for (var i = 0; i < str.length; i++) { + a = (a << 8) | str.charCodeAt(i); + } + return a >>> 0; + } - this.compileGlyphImpl(code, cmds); + function expectString(obj) { + if (!isString(obj)) { + error('Malformed CMap: expected string.'); + } + } - cmds.push({cmd: 'restore'}); + function expectInt(obj) { + if (!isInt(obj)) { + error('Malformed CMap: expected int.'); + } + } - return cmds; - }, + function parseBfChar(cMap, lexer) { + while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } + if (isCmd(obj, 'endbfchar')) { + return; + } + expectString(obj); + var src = strToInt(obj); + obj = lexer.getObj(); + // TODO are /dstName used? + expectString(obj); + var dst = obj; + cMap.mapOne(src, dst); + } + } - compileGlyphImpl: function () { - error('Children classes should implement this.'); - }, + function parseBfRange(cMap, lexer) { + while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } + if (isCmd(obj, 'endbfrange')) { + return; + } + expectString(obj); + var low = strToInt(obj); + obj = lexer.getObj(); + expectString(obj); + var high = strToInt(obj); + obj = lexer.getObj(); + if (isInt(obj) || isString(obj)) { + var dstLow = isInt(obj) ? String.fromCharCode(obj) : obj; + cMap.mapBfRange(low, high, dstLow); + } else if (isCmd(obj, '[')) { + obj = lexer.getObj(); + var array = []; + while (!isCmd(obj, ']') && !isEOF(obj)) { + array.push(obj); + obj = lexer.getObj(); + } + cMap.mapBfRangeToArray(low, high, array); + } else { + break; + } + } + error('Invalid bf range.'); + } - hasBuiltPath: function (unicode) { - var gid = lookupCmap(this.cmap, unicode); - return gid in this.compiledGlyphs; + function parseCidChar(cMap, lexer) { + while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } + if (isCmd(obj, 'endcidchar')) { + return; + } + expectString(obj); + var src = strToInt(obj); + obj = lexer.getObj(); + expectInt(obj); + var dst = obj; + cMap.mapOne(src, dst); } - }; + } - function TrueTypeCompiled(glyphs, cmap, fontMatrix) { - fontMatrix = fontMatrix || [0.000488, 0, 0, 0.000488, 0, 0]; - CompiledFont.call(this, fontMatrix); + function parseCidRange(cMap, lexer) { + while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } + if (isCmd(obj, 'endcidrange')) { + return; + } + expectString(obj); + var low = strToInt(obj); + obj = lexer.getObj(); + expectString(obj); + var high = strToInt(obj); + obj = lexer.getObj(); + expectInt(obj); + var dstLow = obj; + cMap.mapCidRange(low, high, dstLow); + } + } - this.glyphs = glyphs; - this.cmap = cmap; + function parseCodespaceRange(cMap, lexer) { + while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } + if (isCmd(obj, 'endcodespacerange')) { + return; + } + if (!isString(obj)) { + break; + } + var low = strToInt(obj); + obj = lexer.getObj(); + if (!isString(obj)) { + break; + } + var high = strToInt(obj); + cMap.addCodespaceRange(obj.length, low, high); + } + error('Invalid codespace range.'); + } - this.compiledGlyphs = []; + function parseWMode(cMap, lexer) { + var obj = lexer.getObj(); + if (isInt(obj)) { + cMap.vertical = !!obj; + } } - Util.inherit(TrueTypeCompiled, CompiledFont, { - compileGlyphImpl: function (code, cmds) { - compileGlyf(code, cmds, this); + function parseCMapName(cMap, lexer) { + var obj = lexer.getObj(); + if (isName(obj) && isString(obj.name)) { + cMap.name = obj.name; } - }); + } - function Type2Compiled(cffInfo, cmap, fontMatrix, glyphNameMap) { - fontMatrix = fontMatrix || [0.001, 0, 0, 0.001, 0, 0]; - CompiledFont.call(this, fontMatrix); - this.glyphs = cffInfo.glyphs; - this.gsubrs = cffInfo.gsubrs || []; - this.subrs = cffInfo.subrs || []; - this.cmap = cmap; - this.glyphNameMap = glyphNameMap || GlyphsUnicode; + function parseCMap(cMap, lexer, builtInCMapParams, useCMap) { + var previous; + var embededUseCMap; + objLoop: while (true) { + var obj = lexer.getObj(); + if (isEOF(obj)) { + break; + } else if (isName(obj)) { + if (obj.name === 'WMode') { + parseWMode(cMap, lexer); + } else if (obj.name === 'CMapName') { + parseCMapName(cMap, lexer); + } + previous = obj; + } else if (isCmd(obj)) { + switch (obj.cmd) { + case 'endcmap': + break objLoop; + case 'usecmap': + if (isName(previous)) { + embededUseCMap = previous.name; + } + break; + case 'begincodespacerange': + parseCodespaceRange(cMap, lexer); + break; + case 'beginbfchar': + parseBfChar(cMap, lexer); + break; + case 'begincidchar': + parseCidChar(cMap, lexer); + break; + case 'beginbfrange': + parseBfRange(cMap, lexer); + break; + case 'begincidrange': + parseCidRange(cMap, lexer); + break; + } + } + } - this.compiledGlyphs = []; - this.gsubrsBias = (this.gsubrs.length < 1240 ? - 107 : (this.gsubrs.length < 33900 ? 1131 : 32768)); - this.subrsBias = (this.subrs.length < 1240 ? - 107 : (this.subrs.length < 33900 ? 1131 : 32768)); + if (!useCMap && embededUseCMap) { + // Load the usecmap definition from the file only if there wasn't one + // specified. + useCMap = embededUseCMap; + } + if (useCMap) { + extendCMap(cMap, builtInCMapParams, useCMap); + } } - Util.inherit(Type2Compiled, CompiledFont, { - compileGlyphImpl: function (code, cmds) { - compileCharString(code, cmds, this); + function extendCMap(cMap, builtInCMapParams, useCMap) { + cMap.useCMap = createBuiltInCMap(useCMap, builtInCMapParams); + // If there aren't any code space ranges defined clone all the parent ones + // into this cMap. + if (cMap.numCodespaceRanges === 0) { + var useCodespaceRanges = cMap.useCMap.codespaceRanges; + for (var i = 0; i < useCodespaceRanges.length; i++) { + cMap.codespaceRanges[i] = useCodespaceRanges[i].slice(); + } + cMap.numCodespaceRanges = cMap.useCMap.numCodespaceRanges; + } + // Merge the map into the current one, making sure not to override + // any previously defined entries. + cMap.useCMap.forEach(function(key, value) { + if (!cMap.contains(key)) { + cMap.mapOne(key, cMap.useCMap.lookup(key)); + } + }); + } + + function parseBinaryCMap(name, builtInCMapParams) { + var url = builtInCMapParams.url + name + '.bcmap'; + var cMap = new CMap(true); + new BinaryCMapReader().read(url, cMap, function (useCMap) { + extendCMap(cMap, builtInCMapParams, useCMap); + }); + return cMap; + } + + function createBuiltInCMap(name, builtInCMapParams) { + if (name === 'Identity-H') { + return new IdentityCMap(false, 2); + } else if (name === 'Identity-V') { + return new IdentityCMap(true, 2); + } + if (BUILT_IN_CMAPS.indexOf(name) === -1) { + error('Unknown cMap name: ' + name); + } + assert(builtInCMapParams, 'built-in cMap parameters are not provided'); + + if (builtInCMapParams.packed) { + return parseBinaryCMap(name, builtInCMapParams); } - }); + var request = new XMLHttpRequest(); + var url = builtInCMapParams.url + name; + request.open('GET', url, false); + request.send(null); + if (!request.responseText) { + error('Unable to get cMap at: ' + url); + } + var cMap = new CMap(true); + var lexer = new Lexer(new StringStream(request.responseText)); + parseCMap(cMap, lexer, builtInCMapParams, null); + return cMap; + } return { - create: function FontRendererFactory_create(font) { - var data = new Uint8Array(font.data); - var cmap, glyf, loca, cff, indexToLocFormat, unitsPerEm; - var numTables = getUshort(data, 4); - for (var i = 0, p = 12; i < numTables; i++, p += 16) { - var tag = bytesToString(data.subarray(p, p + 4)); - var offset = getLong(data, p + 8); - var length = getLong(data, p + 12); - switch (tag) { - case 'cmap': - cmap = parseCmap(data, offset, offset + length); - break; - case 'glyf': - glyf = data.subarray(offset, offset + length); - break; - case 'loca': - loca = data.subarray(offset, offset + length); - break; - case 'head': - unitsPerEm = getUshort(data, offset + 18); - indexToLocFormat = getUshort(data, offset + 50); - break; - case 'CFF ': - cff = parseCff(data, offset, offset + length); - break; + create: function (encoding, builtInCMapParams, useCMap) { + if (isName(encoding)) { + return createBuiltInCMap(encoding.name, builtInCMapParams); + } else if (isStream(encoding)) { + var cMap = new CMap(); + var lexer = new Lexer(encoding); + try { + parseCMap(cMap, lexer, builtInCMapParams, useCMap); + } catch (e) { + warn('Invalid CMap data. ' + e); } + if (cMap.isIdentityCMap) { + return createBuiltInCMap(cMap.name, builtInCMapParams); + } + return cMap; } - - if (glyf) { - var fontMatrix = (!unitsPerEm ? font.fontMatrix : - [1 / unitsPerEm, 0, 0, 1 / unitsPerEm, 0, 0]); - return new TrueTypeCompiled( - parseGlyfTable(glyf, loca, indexToLocFormat), cmap, fontMatrix); - } else { - return new Type2Compiled(cff, cmap, font.fontMatrix, font.glyphNameMap); - } + error('Encoding required.'); } }; })(); - -// TODO refactor to remove cyclic dependency on fonts.js -function _setCoreFonts(coreFonts_) { - coreFonts = coreFonts_; - Encodings = coreFonts_.Encodings; - CFFParser = coreFonts_.CFFParser; -} -exports._setCoreFonts = _setCoreFonts; - -exports.FontRendererFactory = FontRendererFactory; +exports.CMap = CMap; +exports.CMapFactory = CMapFactory; +exports.IdentityCMap = IdentityCMap; })); (function (root, factory) { { - factory((root.pdfjsCoreParser = {}), root.pdfjsSharedUtil, - root.pdfjsCorePrimitives, root.pdfjsCoreStream); + factory((root.pdfjsCoreObj = {}), root.pdfjsSharedUtil, + root.pdfjsCorePrimitives, root.pdfjsCoreCrypto, root.pdfjsCoreParser, + root.pdfjsCoreChunkedStream); } -}(this, function (exports, sharedUtil, corePrimitives, coreStream) { +}(this, function (exports, sharedUtil, corePrimitives, coreCrypto, coreParser, + coreChunkedStream) { +var InvalidPDFException = sharedUtil.InvalidPDFException; var MissingDataException = sharedUtil.MissingDataException; -var StreamType = sharedUtil.StreamType; +var XRefParseException = sharedUtil.XRefParseException; var assert = sharedUtil.assert; +var bytesToString = sharedUtil.bytesToString; +var createPromiseCapability = sharedUtil.createPromiseCapability; var error = sharedUtil.error; var info = sharedUtil.info; var isArray = sharedUtil.isArray; var isInt = sharedUtil.isInt; -var isNum = sharedUtil.isNum; var isString = sharedUtil.isString; +var shadow = sharedUtil.shadow; +var stringToPDFString = sharedUtil.stringToPDFString; +var stringToUTF8String = sharedUtil.stringToUTF8String; var warn = sharedUtil.warn; -var Cmd = corePrimitives.Cmd; -var Dict = corePrimitives.Dict; -var Name = corePrimitives.Name; var Ref = corePrimitives.Ref; +var RefSet = corePrimitives.RefSet; +var RefSetCache = corePrimitives.RefSetCache; +var isName = corePrimitives.isName; var isCmd = corePrimitives.isCmd; var isDict = corePrimitives.isDict; -var isName = corePrimitives.isName; -var Ascii85Stream = coreStream.Ascii85Stream; -var AsciiHexStream = coreStream.AsciiHexStream; -var CCITTFaxStream = coreStream.CCITTFaxStream; -var FlateStream = coreStream.FlateStream; -var Jbig2Stream = coreStream.Jbig2Stream; -var JpegStream = coreStream.JpegStream; -var JpxStream = coreStream.JpxStream; -var LZWStream = coreStream.LZWStream; -var NullStream = coreStream.NullStream; -var PredictorStream = coreStream.PredictorStream; -var RunLengthStream = coreStream.RunLengthStream; +var isRef = corePrimitives.isRef; +var isStream = corePrimitives.isStream; +var CipherTransformFactory = coreCrypto.CipherTransformFactory; +var Lexer = coreParser.Lexer; +var Parser = coreParser.Parser; +var ChunkedStream = coreChunkedStream.ChunkedStream; -var EOF = {}; +var Catalog = (function CatalogClosure() { + function Catalog(pdfManager, xref, pageFactory) { + this.pdfManager = pdfManager; + this.xref = xref; + this.catDict = xref.getCatalogObj(); + this.fontCache = new RefSetCache(); + assert(isDict(this.catDict), + 'catalog object is not a dictionary'); -function isEOF(v) { - return (v === EOF); -} + // TODO refactor to move getPage() to the PDFDocument. + this.pageFactory = pageFactory; + this.pagePromises = []; + } -var MAX_LENGTH_TO_CACHE = 1000; + Catalog.prototype = { + get metadata() { + var streamRef = this.catDict.getRaw('Metadata'); + if (!isRef(streamRef)) { + return shadow(this, 'metadata', null); + } -var Parser = (function ParserClosure() { - function Parser(lexer, allowStreams, xref) { - this.lexer = lexer; - this.allowStreams = allowStreams; - this.xref = xref; - this.imageCache = {}; - this.refill(); - } + var encryptMetadata = (!this.xref.encrypt ? false : + this.xref.encrypt.encryptMetadata); - Parser.prototype = { - refill: function Parser_refill() { - this.buf1 = this.lexer.getObj(); - this.buf2 = this.lexer.getObj(); - }, - shift: function Parser_shift() { - if (isCmd(this.buf2, 'ID')) { - this.buf1 = this.buf2; - this.buf2 = null; - } else { - this.buf1 = this.buf2; - this.buf2 = this.lexer.getObj(); + var stream = this.xref.fetch(streamRef, !encryptMetadata); + var metadata; + if (stream && isDict(stream.dict)) { + var type = stream.dict.get('Type'); + var subtype = stream.dict.get('Subtype'); + + if (isName(type) && isName(subtype) && + type.name === 'Metadata' && subtype.name === 'XML') { + // XXX: This should examine the charset the XML document defines, + // however since there are currently no real means to decode + // arbitrary charsets, let's just hope that the author of the PDF + // was reasonable enough to stick with the XML default charset, + // which is UTF-8. + try { + metadata = stringToUTF8String(bytesToString(stream.getBytes())); + } catch (e) { + info('Skipping invalid metadata.'); + } + } } + + return shadow(this, 'metadata', metadata); }, - tryShift: function Parser_tryShift() { + get toplevelPagesDict() { + var pagesObj = this.catDict.get('Pages'); + assert(isDict(pagesObj), 'invalid top-level pages dictionary'); + // shadow the prototype getter + return shadow(this, 'toplevelPagesDict', pagesObj); + }, + get documentOutline() { + var obj = null; try { - this.shift(); - return true; - } catch (e) { - if (e instanceof MissingDataException) { - throw e; + obj = this.readDocumentOutline(); + } catch (ex) { + if (ex instanceof MissingDataException) { + throw ex; } - // Upon failure, the caller should reset this.lexer.pos to a known good - // state and call this.shift() twice to reset the buffers. - return false; + warn('Unable to read document outline'); } + return shadow(this, 'documentOutline', obj); }, - getObj: function Parser_getObj(cipherTransform) { - var buf1 = this.buf1; - this.shift(); - - if (buf1 instanceof Cmd) { - switch (buf1.cmd) { - case 'BI': // inline image - return this.makeInlineImage(cipherTransform); - case '[': // array - var array = []; - while (!isCmd(this.buf1, ']') && !isEOF(this.buf1)) { - array.push(this.getObj(cipherTransform)); + readDocumentOutline: function Catalog_readDocumentOutline() { + var xref = this.xref; + var obj = this.catDict.get('Outlines'); + var root = { items: [] }; + if (isDict(obj)) { + obj = obj.getRaw('First'); + var processed = new RefSet(); + if (isRef(obj)) { + var queue = [{obj: obj, parent: root}]; + // to avoid recursion keeping track of the items + // in the processed dictionary + processed.put(obj); + while (queue.length > 0) { + var i = queue.shift(); + var outlineDict = xref.fetchIfRef(i.obj); + if (outlineDict === null) { + continue; } - if (isEOF(this.buf1)) { - error('End of file inside array'); + if (!outlineDict.has('Title')) { + error('Invalid outline item'); } - this.shift(); - return array; - case '<<': // dictionary or stream - var dict = new Dict(this.xref); - while (!isCmd(this.buf1, '>>') && !isEOF(this.buf1)) { - if (!isName(this.buf1)) { - info('Malformed dictionary: key must be a name object'); - this.shift(); - continue; - } - - var key = this.buf1.name; - this.shift(); - if (isEOF(this.buf1)) { - break; + var dest = outlineDict.get('A'); + if (dest) { + dest = dest.get('D'); + } else if (outlineDict.has('Dest')) { + dest = outlineDict.getRaw('Dest'); + if (isName(dest)) { + dest = dest.name; } - dict.set(key, this.getObj(cipherTransform)); } - if (isEOF(this.buf1)) { - error('End of file inside dictionary'); + var title = outlineDict.get('Title'); + var outlineItem = { + dest: dest, + title: stringToPDFString(title), + color: outlineDict.get('C') || [0, 0, 0], + count: outlineDict.get('Count'), + bold: !!(outlineDict.get('F') & 2), + italic: !!(outlineDict.get('F') & 1), + items: [] + }; + i.parent.items.push(outlineItem); + obj = outlineDict.getRaw('First'); + if (isRef(obj) && !processed.has(obj)) { + queue.push({obj: obj, parent: outlineItem}); + processed.put(obj); } - - // Stream objects are not allowed inside content streams or - // object streams. - if (isCmd(this.buf2, 'stream')) { - return (this.allowStreams ? - this.makeStream(dict, cipherTransform) : dict); + obj = outlineDict.getRaw('Next'); + if (isRef(obj) && !processed.has(obj)) { + queue.push({obj: obj, parent: i.parent}); + processed.put(obj); } - this.shift(); - return dict; - default: // simple object - return buf1; + } } } - - if (isInt(buf1)) { // indirect reference or integer - var num = buf1; - if (isInt(this.buf1) && isCmd(this.buf2, 'R')) { - var ref = new Ref(num, this.buf1); - this.shift(); - this.shift(); - return ref; - } - return num; + return (root.items.length > 0 ? root.items : null); + }, + get numPages() { + var obj = this.toplevelPagesDict.get('Count'); + assert( + isInt(obj), + 'page count in top level pages object is not an integer' + ); + // shadow the prototype getter + return shadow(this, 'num', obj); + }, + get destinations() { + function fetchDestination(dest) { + return isDict(dest) ? dest.get('D') : dest; } - if (isString(buf1)) { // string - var str = buf1; - if (cipherTransform) { - str = cipherTransform.decryptString(str); - } - return str; + var xref = this.xref; + var dests = {}, nameTreeRef, nameDictionaryRef; + var obj = this.catDict.get('Names'); + if (obj && obj.has('Dests')) { + nameTreeRef = obj.getRaw('Dests'); + } else if (this.catDict.has('Dests')) { + nameDictionaryRef = this.catDict.get('Dests'); } - // simple object - return buf1; - }, - /** - * Find the end of the stream by searching for the /EI\s/. - * @returns {number} The inline stream length. - */ - findDefaultInlineStreamEnd: - function Parser_findDefaultInlineStreamEnd(stream) { - var E = 0x45, I = 0x49, SPACE = 0x20, LF = 0xA, CR = 0xD; - var startPos = stream.pos, state = 0, ch, i, n, followingBytes; - while ((ch = stream.getByte()) !== -1) { - if (state === 0) { - state = (ch === E) ? 1 : 0; - } else if (state === 1) { - state = (ch === I) ? 2 : 0; - } else { - assert(state === 2); - if (ch === SPACE || ch === LF || ch === CR) { - // Let's check the next five bytes are ASCII... just be sure. - n = 5; - followingBytes = stream.peekBytes(n); - for (i = 0; i < n; i++) { - ch = followingBytes[i]; - if (ch !== LF && ch !== CR && (ch < SPACE || ch > 0x7F)) { - // Not a LF, CR, SPACE or any visible ASCII character, i.e. - // it's binary stuff. Resetting the state. - state = 0; - break; - } - } - if (state === 2) { - break; // Finished! - } - } else { - state = 0; + if (nameDictionaryRef) { + // reading simple destination dictionary + obj = nameDictionaryRef; + obj.forEach(function catalogForEach(key, value) { + if (!value) { + return; } - } + dests[key] = fetchDestination(value); + }); } - return ((stream.pos - 4) - startPos); - }, - /** - * Find the EOI (end-of-image) marker 0xFFD9 of the stream. - * @returns {number} The inline stream length. - */ - findDCTDecodeInlineStreamEnd: - function Parser_findDCTDecodeInlineStreamEnd(stream) { - var startPos = stream.pos, foundEOI = false, b, markerLength, length; - while ((b = stream.getByte()) !== -1) { - if (b !== 0xFF) { // Not a valid marker. - continue; - } - switch (stream.getByte()) { - case 0x00: // Byte stuffing. - // 0xFF00 appears to be a very common byte sequence in JPEG images. - break; - - case 0xFF: // Fill byte. - // Avoid skipping a valid marker, resetting the stream position. - stream.skip(-1); - break; - - case 0xD9: // EOI - foundEOI = true; - break; - - case 0xC0: // SOF0 - case 0xC1: // SOF1 - case 0xC2: // SOF2 - case 0xC3: // SOF3 - - case 0xC5: // SOF5 - case 0xC6: // SOF6 - case 0xC7: // SOF7 - - case 0xC9: // SOF9 - case 0xCA: // SOF10 - case 0xCB: // SOF11 - - case 0xCD: // SOF13 - case 0xCE: // SOF14 - case 0xCF: // SOF15 - - case 0xC4: // DHT - case 0xCC: // DAC - - case 0xDA: // SOS - case 0xDB: // DQT - case 0xDC: // DNL - case 0xDD: // DRI - case 0xDE: // DHP - case 0xDF: // EXP - - case 0xE0: // APP0 - case 0xE1: // APP1 - case 0xE2: // APP2 - case 0xE3: // APP3 - case 0xE4: // APP4 - case 0xE5: // APP5 - case 0xE6: // APP6 - case 0xE7: // APP7 - case 0xE8: // APP8 - case 0xE9: // APP9 - case 0xEA: // APP10 - case 0xEB: // APP11 - case 0xEC: // APP12 - case 0xED: // APP13 - case 0xEE: // APP14 - case 0xEF: // APP15 - - case 0xFE: // COM - // The marker should be followed by the length of the segment. - markerLength = stream.getUint16(); - if (markerLength > 2) { - // |markerLength| contains the byte length of the marker segment, - // including its own length (2 bytes) and excluding the marker. - stream.skip(markerLength - 2); // Jump to the next marker. - } else { - // The marker length is invalid, resetting the stream position. - stream.skip(-2); - } - break; - } - if (foundEOI) { - break; + if (nameTreeRef) { + var nameTree = new NameTree(nameTreeRef, xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; + } + dests[name] = fetchDestination(names[name]); } } - length = stream.pos - startPos; - if (b === -1) { - warn('Inline DCTDecode image stream: ' + - 'EOI marker not found, searching for /EI/ instead.'); - stream.skip(-length); // Reset the stream position. - return this.findDefaultInlineStreamEnd(stream); - } - this.inlineStreamSkipEI(stream); - return length; + return shadow(this, 'destinations', dests); }, - /** - * Find the EOD (end-of-data) marker '~>' (i.e. TILDE + GT) of the stream. - * @returns {number} The inline stream length. - */ - findASCII85DecodeInlineStreamEnd: - function Parser_findASCII85DecodeInlineStreamEnd(stream) { - var TILDE = 0x7E, GT = 0x3E; - var startPos = stream.pos, ch, length; - while ((ch = stream.getByte()) !== -1) { - if (ch === TILDE && stream.peekByte() === GT) { - stream.skip(); - break; - } - } - length = stream.pos - startPos; - if (ch === -1) { - warn('Inline ASCII85Decode image stream: ' + - 'EOD marker not found, searching for /EI/ instead.'); - stream.skip(-length); // Reset the stream position. - return this.findDefaultInlineStreamEnd(stream); + getDestination: function Catalog_getDestination(destinationId) { + function fetchDestination(dest) { + return isDict(dest) ? dest.get('D') : dest; } - this.inlineStreamSkipEI(stream); - return length; - }, - /** - * Find the EOD (end-of-data) marker '>' (i.e. GT) of the stream. - * @returns {number} The inline stream length. - */ - findASCIIHexDecodeInlineStreamEnd: - function Parser_findASCIIHexDecodeInlineStreamEnd(stream) { - var GT = 0x3E; - var startPos = stream.pos, ch, length; - while ((ch = stream.getByte()) !== -1) { - if (ch === GT) { - break; + + var xref = this.xref; + var dest = null, nameTreeRef, nameDictionaryRef; + var obj = this.catDict.get('Names'); + if (obj && obj.has('Dests')) { + nameTreeRef = obj.getRaw('Dests'); + } else if (this.catDict.has('Dests')) { + nameDictionaryRef = this.catDict.get('Dests'); + } + + if (nameDictionaryRef) { // Simple destination dictionary. + var value = nameDictionaryRef.get(destinationId); + if (value) { + dest = fetchDestination(value); } } - length = stream.pos - startPos; - if (ch === -1) { - warn('Inline ASCIIHexDecode image stream: ' + - 'EOD marker not found, searching for /EI/ instead.'); - stream.skip(-length); // Reset the stream position. - return this.findDefaultInlineStreamEnd(stream); + if (nameTreeRef) { + var nameTree = new NameTree(nameTreeRef, xref); + dest = fetchDestination(nameTree.get(destinationId)); } - this.inlineStreamSkipEI(stream); - return length; + return dest; }, - /** - * Skip over the /EI/ for streams where we search for an EOD marker. - */ - inlineStreamSkipEI: function Parser_inlineStreamSkipEI(stream) { - var E = 0x45, I = 0x49; - var state = 0, ch; - while ((ch = stream.getByte()) !== -1) { - if (state === 0) { - state = (ch === E) ? 1 : 0; - } else if (state === 1) { - state = (ch === I) ? 2 : 0; - } else if (state === 2) { - break; + get attachments() { + var xref = this.xref; + var attachments = null, nameTreeRef; + var obj = this.catDict.get('Names'); + if (obj) { + nameTreeRef = obj.getRaw('EmbeddedFiles'); + } + + if (nameTreeRef) { + var nameTree = new NameTree(nameTreeRef, xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; + } + var fs = new FileSpec(names[name], xref); + if (!attachments) { + attachments = {}; + } + attachments[stringToPDFString(name)] = fs.serializable; } } + return shadow(this, 'attachments', attachments); }, - makeInlineImage: function Parser_makeInlineImage(cipherTransform) { - var lexer = this.lexer; - var stream = lexer.stream; + get javaScript() { + var xref = this.xref; + var obj = this.catDict.get('Names'); - // Parse dictionary. - var dict = new Dict(this.xref); - while (!isCmd(this.buf1, 'ID') && !isEOF(this.buf1)) { - if (!isName(this.buf1)) { - error('Dictionary key must be a name object'); + var javaScript = []; + function appendIfJavaScriptDict(jsDict) { + var type = jsDict.get('S'); + if (!isName(type) || type.name !== 'JavaScript') { + return; } - var key = this.buf1.name; - this.shift(); - if (isEOF(this.buf1)) { - break; + var js = jsDict.get('JS'); + if (isStream(js)) { + js = bytesToString(js.getBytes()); + } else if (!isString(js)) { + return; } - dict.set(key, this.getObj(cipherTransform)); - } - - // Extract the name of the first (i.e. the current) image filter. - var filter = dict.get('Filter', 'F'), filterName; - if (isName(filter)) { - filterName = filter.name; - } else if (isArray(filter) && isName(filter[0])) { - filterName = filter[0].name; + javaScript.push(stringToPDFString(js)); } - - // Parse image stream. - var startPos = stream.pos, length, i, ii; - if (filterName === 'DCTDecode' || filterName === 'DCT') { - length = this.findDCTDecodeInlineStreamEnd(stream); - } else if (filterName === 'ASCII85Decide' || filterName === 'A85') { - length = this.findASCII85DecodeInlineStreamEnd(stream); - } else if (filterName === 'ASCIIHexDecode' || filterName === 'AHx') { - length = this.findASCIIHexDecodeInlineStreamEnd(stream); - } else { - length = this.findDefaultInlineStreamEnd(stream); + if (obj && obj.has('JavaScript')) { + var nameTree = new NameTree(obj.getRaw('JavaScript'), xref); + var names = nameTree.getAll(); + for (var name in names) { + if (!names.hasOwnProperty(name)) { + continue; + } + // We don't really use the JavaScript right now. This code is + // defensive so we don't cause errors on document load. + var jsDict = names[name]; + if (isDict(jsDict)) { + appendIfJavaScriptDict(jsDict); + } + } } - var imageStream = stream.makeSubStream(startPos, length, dict); - - // Cache all images below the MAX_LENGTH_TO_CACHE threshold by their - // adler32 checksum. - var adler32; - if (length < MAX_LENGTH_TO_CACHE) { - var imageBytes = imageStream.getBytes(); - imageStream.reset(); - var a = 1; - var b = 0; - for (i = 0, ii = imageBytes.length; i < ii; ++i) { - // No modulo required in the loop if imageBytes.length < 5552. - a += imageBytes[i] & 0xff; - b += a; + // Append OpenAction actions to javaScript array + var openactionDict = this.catDict.get('OpenAction'); + if (isDict(openactionDict, 'Action')) { + var actionType = openactionDict.get('S'); + if (isName(actionType) && actionType.name === 'Named') { + // The named Print action is not a part of the PDF 1.7 specification, + // but is supported by many PDF readers/writers (including Adobe's). + var action = openactionDict.get('N'); + if (isName(action) && action.name === 'Print') { + javaScript.push('print({});'); + } + } else { + appendIfJavaScriptDict(openactionDict); } - adler32 = ((b % 65521) << 16) | (a % 65521); + } - if (this.imageCache.adler32 === adler32) { - this.buf2 = Cmd.get('EI'); - this.shift(); + return shadow(this, 'javaScript', javaScript); + }, - this.imageCache[adler32].reset(); - return this.imageCache[adler32]; + cleanup: function Catalog_cleanup() { + var promises = []; + this.fontCache.forEach(function (promise) { + promises.push(promise); + }); + return Promise.all(promises).then(function (translatedFonts) { + for (var i = 0, ii = translatedFonts.length; i < ii; i++) { + var font = translatedFonts[i].dict; + delete font.translated; } - } - - if (cipherTransform) { - imageStream = cipherTransform.createStream(imageStream, length); - } + this.fontCache.clear(); + }.bind(this)); + }, - imageStream = this.filter(imageStream, dict, length); - imageStream.dict = dict; - if (adler32 !== undefined) { - imageStream.cacheKey = 'inline_' + length + '_' + adler32; - this.imageCache[adler32] = imageStream; + getPage: function Catalog_getPage(pageIndex) { + if (!(pageIndex in this.pagePromises)) { + this.pagePromises[pageIndex] = this.getPageDict(pageIndex).then( + function (a) { + var dict = a[0]; + var ref = a[1]; + return this.pageFactory.createPage(pageIndex, dict, ref, + this.fontCache); + }.bind(this) + ); } - - this.buf2 = Cmd.get('EI'); - this.shift(); - - return imageStream; + return this.pagePromises[pageIndex]; }, - makeStream: function Parser_makeStream(dict, cipherTransform) { - var lexer = this.lexer; - var stream = lexer.stream; - // get stream start position - lexer.skipToNextLine(); - var pos = stream.pos - 1; + getPageDict: function Catalog_getPageDict(pageIndex) { + var capability = createPromiseCapability(); + var nodesToVisit = [this.catDict.getRaw('Pages')]; + var currentPageIndex = 0; + var xref = this.xref; + var checkAllKids = false; - // get length - var length = dict.get('Length'); - if (!isInt(length)) { - info('Bad ' + length + ' attribute in stream'); - length = 0; - } + function next() { + while (nodesToVisit.length) { + var currentNode = nodesToVisit.pop(); - // skip over the stream data - stream.pos = pos + length; - lexer.nextChar(); + if (isRef(currentNode)) { + xref.fetchAsync(currentNode).then(function (obj) { + if (isDict(obj, 'Page') || (isDict(obj) && !obj.has('Kids'))) { + if (pageIndex === currentPageIndex) { + capability.resolve([obj, currentNode]); + } else { + currentPageIndex++; + next(); + } + return; + } + nodesToVisit.push(obj); + next(); + }, capability.reject); + return; + } - // Shift '>>' and check whether the new object marks the end of the stream - if (this.tryShift() && isCmd(this.buf2, 'endstream')) { - this.shift(); // 'stream' - } else { - // bad stream length, scanning for endstream - stream.pos = pos; - var SCAN_BLOCK_SIZE = 2048; - var ENDSTREAM_SIGNATURE_LENGTH = 9; - var ENDSTREAM_SIGNATURE = [0x65, 0x6E, 0x64, 0x73, 0x74, 0x72, 0x65, - 0x61, 0x6D]; - var skipped = 0, found = false, i, j; - while (stream.pos < stream.end) { - var scanBytes = stream.peekBytes(SCAN_BLOCK_SIZE); - var scanLength = scanBytes.length - ENDSTREAM_SIGNATURE_LENGTH; - if (scanLength <= 0) { - break; + // Must be a child page dictionary. + assert( + isDict(currentNode), + 'page dictionary kid reference points to wrong type of object' + ); + var count = currentNode.get('Count'); + // If the current node doesn't have any children, avoid getting stuck + // in an empty node further down in the tree (see issue5644.pdf). + if (count === 0) { + checkAllKids = true; } - found = false; - for (i = 0, j = 0; i < scanLength; i++) { - var b = scanBytes[i]; - if (b !== ENDSTREAM_SIGNATURE[j]) { - i -= j; - j = 0; - } else { - j++; - if (j >= ENDSTREAM_SIGNATURE_LENGTH) { - i++; - found = true; - break; - } - } + // Skip nodes where the page can't be. + if (currentPageIndex + count <= pageIndex) { + currentPageIndex += count; + continue; } - if (found) { - skipped += i - ENDSTREAM_SIGNATURE_LENGTH; - stream.pos += i - ENDSTREAM_SIGNATURE_LENGTH; - break; + + var kids = currentNode.get('Kids'); + assert(isArray(kids), 'page dictionary kids object is not an array'); + if (!checkAllKids && count === kids.length) { + // Nodes that don't have the page have been skipped and this is the + // bottom of the tree which means the page requested must be a + // descendant of this pages node. Ideally we would just resolve the + // promise with the page ref here, but there is the case where more + // pages nodes could link to single a page (see issue 3666 pdf). To + // handle this push it back on the queue so if it is a pages node it + // will be descended into. + nodesToVisit = [kids[pageIndex - currentPageIndex]]; + currentPageIndex = pageIndex; + continue; + } else { + for (var last = kids.length - 1; last >= 0; last--) { + nodesToVisit.push(kids[last]); + } } - skipped += scanLength; - stream.pos += scanLength; - } - if (!found) { - error('Missing endstream'); } - length = skipped; - - lexer.nextChar(); - this.shift(); - this.shift(); - } - this.shift(); // 'endstream' - - stream = stream.makeSubStream(pos, length, dict); - if (cipherTransform) { - stream = cipherTransform.createStream(stream, length); + capability.reject('Page index ' + pageIndex + ' not found.'); } - stream = this.filter(stream, dict, length); - stream.dict = dict; - return stream; + next(); + return capability.promise; }, - filter: function Parser_filter(stream, dict, length) { - var filter = dict.get('Filter', 'F'); - var params = dict.get('DecodeParms', 'DP'); - if (isName(filter)) { - return this.makeFilter(stream, filter.name, length, params); - } - var maybeLength = length; - if (isArray(filter)) { - var filterArray = filter; - var paramsArray = params; - for (var i = 0, ii = filterArray.length; i < ii; ++i) { - filter = filterArray[i]; - if (!isName(filter)) { - error('Bad filter name: ' + filter); + getPageIndex: function Catalog_getPageIndex(ref) { + // The page tree nodes have the count of all the leaves below them. To get + // how many pages are before we just have to walk up the tree and keep + // adding the count of siblings to the left of the node. + var xref = this.xref; + function pagesBeforeRef(kidRef) { + var total = 0; + var parentRef; + return xref.fetchAsync(kidRef).then(function (node) { + if (!node) { + return null; + } + parentRef = node.getRaw('Parent'); + return node.getAsync('Parent'); + }).then(function (parent) { + if (!parent) { + return null; + } + return parent.getAsync('Kids'); + }).then(function (kids) { + if (!kids) { + return null; + } + var kidPromises = []; + var found = false; + for (var i = 0; i < kids.length; i++) { + var kid = kids[i]; + assert(isRef(kid), 'kids must be a ref'); + if (kid.num === kidRef.num) { + found = true; + break; + } + kidPromises.push(xref.fetchAsync(kid).then(function (kid) { + if (kid.has('Count')) { + var count = kid.get('Count'); + total += count; + } else { // page leaf node + total++; + } + })); + } + if (!found) { + error('kid ref not found in parents kids'); } + return Promise.all(kidPromises).then(function () { + return [total, parentRef]; + }); + }); + } - params = null; - if (isArray(paramsArray) && (i in paramsArray)) { - params = paramsArray[i]; + var total = 0; + function next(ref) { + return pagesBeforeRef(ref).then(function (args) { + if (!args) { + return total; } - stream = this.makeFilter(stream, filter.name, maybeLength, params); - // after the first stream the length variable is invalid - maybeLength = null; - } + var count = args[0]; + var parentRef = args[1]; + total += count; + return next(parentRef); + }); } - return stream; + + return next(ref); + } + }; + + return Catalog; +})(); + +var XRef = (function XRefClosure() { + function XRef(stream, password) { + this.stream = stream; + this.entries = []; + this.xrefstms = {}; + // prepare the XRef cache + this.cache = []; + this.password = password; + this.stats = { + streamTypes: [], + fontTypes: [] + }; + } + + XRef.prototype = { + setStartXRef: function XRef_setStartXRef(startXRef) { + // Store the starting positions of xref tables as we process them + // so we can recover from missing data errors + this.startXRefQueue = [startXRef]; }, - makeFilter: function Parser_makeFilter(stream, name, maybeLength, params) { - if (stream.dict.get('Length') === 0 && !maybeLength) { - warn('Empty "' + name + '" stream.'); - return new NullStream(stream); + + parse: function XRef_parse(recoveryMode) { + var trailerDict; + if (!recoveryMode) { + trailerDict = this.readXRef(); + } else { + warn('Indexing all PDF objects'); + trailerDict = this.indexObjects(); } - try { - if (params && this.xref) { - params = this.xref.fetchIfRef(params); - } - var xrefStreamStats = this.xref.stats.streamTypes; - if (name === 'FlateDecode' || name === 'Fl') { - xrefStreamStats[StreamType.FLATE] = true; - if (params) { - return new PredictorStream(new FlateStream(stream, maybeLength), - maybeLength, params); - } - return new FlateStream(stream, maybeLength); - } - if (name === 'LZWDecode' || name === 'LZW') { - xrefStreamStats[StreamType.LZW] = true; - var earlyChange = 1; - if (params) { - if (params.has('EarlyChange')) { - earlyChange = params.get('EarlyChange'); - } - return new PredictorStream( - new LZWStream(stream, maybeLength, earlyChange), - maybeLength, params); - } - return new LZWStream(stream, maybeLength, earlyChange); - } - if (name === 'DCTDecode' || name === 'DCT') { - xrefStreamStats[StreamType.DCT] = true; - return new JpegStream(stream, maybeLength, stream.dict, this.xref); - } - if (name === 'JPXDecode' || name === 'JPX') { - xrefStreamStats[StreamType.JPX] = true; - return new JpxStream(stream, maybeLength, stream.dict); - } - if (name === 'ASCII85Decode' || name === 'A85') { - xrefStreamStats[StreamType.A85] = true; - return new Ascii85Stream(stream, maybeLength); - } - if (name === 'ASCIIHexDecode' || name === 'AHx') { - xrefStreamStats[StreamType.AHX] = true; - return new AsciiHexStream(stream, maybeLength); - } - if (name === 'CCITTFaxDecode' || name === 'CCF') { - xrefStreamStats[StreamType.CCF] = true; - return new CCITTFaxStream(stream, maybeLength, params); - } - if (name === 'RunLengthDecode' || name === 'RL') { - xrefStreamStats[StreamType.RL] = true; - return new RunLengthStream(stream, maybeLength); - } - if (name === 'JBIG2Decode') { - xrefStreamStats[StreamType.JBIG] = true; - return new Jbig2Stream(stream, maybeLength, stream.dict); - } - warn('filter "' + name + '" not supported yet'); - return stream; - } catch (ex) { - if (ex instanceof MissingDataException) { - throw ex; - } - warn('Invalid stream: \"' + ex + '\"'); - return new NullStream(stream); + trailerDict.assignXref(this); + this.trailer = trailerDict; + var encrypt = trailerDict.get('Encrypt'); + if (encrypt) { + var ids = trailerDict.get('ID'); + var fileId = (ids && ids.length) ? ids[0] : ''; + this.encrypt = new CipherTransformFactory(encrypt, fileId, + this.password); + } + + // get the root dictionary (catalog) object + if (!(this.root = trailerDict.get('Root'))) { + error('Invalid root reference'); } - } - }; + }, - return Parser; -})(); + processXRefTable: function XRef_processXRefTable(parser) { + if (!('tableState' in this)) { + // Stores state of the table as we process it so we can resume + // from middle of table in case of missing data error + this.tableState = { + entryNum: 0, + streamPos: parser.lexer.stream.pos, + parserBuf1: parser.buf1, + parserBuf2: parser.buf2 + }; + } -var Lexer = (function LexerClosure() { - function Lexer(stream, knownCommands) { - this.stream = stream; - this.nextChar(); + var obj = this.readXRefTable(parser); - // While lexing, we build up many strings one char at a time. Using += for - // this can result in lots of garbage strings. It's better to build an - // array of single-char strings and then join() them together at the end. - // And reusing a single array (i.e. |this.strBuf|) over and over for this - // purpose uses less memory than using a new array for each string. - this.strBuf = []; + // Sanity check + if (!isCmd(obj, 'trailer')) { + error('Invalid XRef table: could not find trailer dictionary'); + } + // Read trailer dictionary, e.g. + // trailer + // << /Size 22 + // /Root 20R + // /Info 10R + // /ID [ <81b14aafa313db63dbd6f981e49f94f4> ] + // >> + // The parser goes through the entire stream << ... >> and provides + // a getter interface for the key-value table + var dict = parser.getObj(); - // The PDFs might have "glued" commands with other commands, operands or - // literals, e.g. "q1". The knownCommands is a dictionary of the valid - // commands and their prefixes. The prefixes are built the following way: - // if there a command that is a prefix of the other valid command or - // literal (e.g. 'f' and 'false') the following prefixes must be included, - // 'fa', 'fal', 'fals'. The prefixes are not needed, if the command has no - // other commands or literals as a prefix. The knowCommands is optional. - this.knownCommands = knownCommands; - } + // The pdflib PDF generator can generate a nested trailer dictionary + if (!isDict(dict) && dict.dict) { + dict = dict.dict; + } + if (!isDict(dict)) { + error('Invalid XRef table: could not parse trailer dictionary'); + } + delete this.tableState; - Lexer.isSpace = function Lexer_isSpace(ch) { - // Space is one of the following characters: SPACE, TAB, CR or LF. - return (ch === 0x20 || ch === 0x09 || ch === 0x0D || ch === 0x0A); - }; + return dict; + }, - // A '1' in this array means the character is white space. A '1' or - // '2' means the character ends a name or command. - var specialChars = [ - 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 0, 0, // 0x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 1x - 1, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 0, 0, 2, // 2x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, // 3x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 4x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 5x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 6x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, // 7x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 8x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 9x - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ax - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // bx - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // cx - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // dx - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ex - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // fx - ]; + readXRefTable: function XRef_readXRefTable(parser) { + // Example of cross-reference table: + // xref + // 0 1 <-- subsection header (first obj #, obj count) + // 0000000000 65535 f <-- actual object (offset, generation #, f/n) + // 23 2 <-- subsection header ... and so on ... + // 0000025518 00002 n + // 0000025635 00000 n + // trailer + // ... - function toHexDigit(ch) { - if (ch >= 0x30 && ch <= 0x39) { // '0'-'9' - return ch & 0x0F; - } - if ((ch >= 0x41 && ch <= 0x46) || (ch >= 0x61 && ch <= 0x66)) { - // 'A'-'F', 'a'-'f' - return (ch & 0x0F) + 9; - } - return -1; - } + var stream = parser.lexer.stream; + var tableState = this.tableState; + stream.pos = tableState.streamPos; + parser.buf1 = tableState.parserBuf1; + parser.buf2 = tableState.parserBuf2; - Lexer.prototype = { - nextChar: function Lexer_nextChar() { - return (this.currentChar = this.stream.getByte()); - }, - peekChar: function Lexer_peekChar() { - return this.stream.peekByte(); - }, - getNumber: function Lexer_getNumber() { - var ch = this.currentChar; - var eNotation = false; - var divideBy = 0; // different from 0 if it's a floating point value - var sign = 1; + // Outer loop is over subsection headers + var obj; - if (ch === 0x2D) { // '-' - sign = -1; - ch = this.nextChar(); + while (true) { + if (!('firstEntryNum' in tableState) || !('entryCount' in tableState)) { + if (isCmd(obj = parser.getObj(), 'trailer')) { + break; + } + tableState.firstEntryNum = obj; + tableState.entryCount = parser.getObj(); + } - if (ch === 0x2D) { // '-' - // Ignore double negative (this is consistent with Adobe Reader). - ch = this.nextChar(); + var first = tableState.firstEntryNum; + var count = tableState.entryCount; + if (!isInt(first) || !isInt(count)) { + error('Invalid XRef table: wrong types in subsection header'); } - } else if (ch === 0x2B) { // '+' - ch = this.nextChar(); - } - if (ch === 0x2E) { // '.' - divideBy = 10; - ch = this.nextChar(); - } - if (ch < 0x30 || ch > 0x39) { // '0' - '9' - error('Invalid number: ' + String.fromCharCode(ch)); - return 0; - } + // Inner loop is over objects themselves + for (var i = tableState.entryNum; i < count; i++) { + tableState.streamPos = stream.pos; + tableState.entryNum = i; + tableState.parserBuf1 = parser.buf1; + tableState.parserBuf2 = parser.buf2; - var baseValue = ch - 0x30; // '0' - var powerValue = 0; - var powerValueSign = 1; + var entry = {}; + entry.offset = parser.getObj(); + entry.gen = parser.getObj(); + var type = parser.getObj(); - while ((ch = this.nextChar()) >= 0) { - if (0x30 <= ch && ch <= 0x39) { // '0' - '9' - var currentDigit = ch - 0x30; // '0' - if (eNotation) { // We are after an 'e' or 'E' - powerValue = powerValue * 10 + currentDigit; - } else { - if (divideBy !== 0) { // We are after a point - divideBy *= 10; - } - baseValue = baseValue * 10 + currentDigit; + if (isCmd(type, 'f')) { + entry.free = true; + } else if (isCmd(type, 'n')) { + entry.uncompressed = true; } - } else if (ch === 0x2E) { // '.' - if (divideBy === 0) { - divideBy = 1; - } else { - // A number can have only one '.' - break; + + // Validate entry obj + if (!isInt(entry.offset) || !isInt(entry.gen) || + !(entry.free || entry.uncompressed)) { + error('Invalid entry in XRef subsection: ' + first + ', ' + count); } - } else if (ch === 0x2D) { // '-' - // ignore minus signs in the middle of numbers to match - // Adobe's behavior - warn('Badly formated number'); - } else if (ch === 0x45 || ch === 0x65) { // 'E', 'e' - // 'E' can be either a scientific notation or the beginning of a new - // operator - ch = this.peekChar(); - if (ch === 0x2B || ch === 0x2D) { // '+', '-' - powerValueSign = (ch === 0x2D) ? -1 : 1; - this.nextChar(); // Consume the sign character - } else if (ch < 0x30 || ch > 0x39) { // '0' - '9' - // The 'E' must be the beginning of a new operator - break; + + if (!this.entries[i + first]) { + this.entries[i + first] = entry; } - eNotation = true; - } else { - // the last character doesn't belong to us - break; } + + tableState.entryNum = 0; + tableState.streamPos = stream.pos; + tableState.parserBuf1 = parser.buf1; + tableState.parserBuf2 = parser.buf2; + delete tableState.firstEntryNum; + delete tableState.entryCount; } - if (divideBy !== 0) { - baseValue /= divideBy; + // Per issue 3248: hp scanners generate bad XRef + if (first === 1 && this.entries[1] && this.entries[1].free) { + // shifting the entries + this.entries.shift(); } - if (eNotation) { - baseValue *= Math.pow(10, powerValueSign * powerValue); + + // Sanity check: as per spec, first object must be free + if (this.entries[0] && !this.entries[0].free) { + error('Invalid XRef table: unexpected first object'); } - return sign * baseValue; + return obj; }, - getString: function Lexer_getString() { - var numParen = 1; - var done = false; - var strBuf = this.strBuf; - strBuf.length = 0; - var ch = this.nextChar(); - while (true) { - var charBuffered = false; - switch (ch | 0) { - case -1: - warn('Unterminated string'); - done = true; - break; - case 0x28: // '(' - ++numParen; - strBuf.push('('); - break; - case 0x29: // ')' - if (--numParen === 0) { - this.nextChar(); // consume strings ')' - done = true; - } else { - strBuf.push(')'); - } - break; - case 0x5C: // '\\' - ch = this.nextChar(); - switch (ch) { - case -1: - warn('Unterminated string'); - done = true; - break; - case 0x6E: // 'n' - strBuf.push('\n'); - break; - case 0x72: // 'r' - strBuf.push('\r'); - break; - case 0x74: // 't' - strBuf.push('\t'); - break; - case 0x62: // 'b' - strBuf.push('\b'); - break; - case 0x66: // 'f' - strBuf.push('\f'); - break; - case 0x5C: // '\' - case 0x28: // '(' - case 0x29: // ')' - strBuf.push(String.fromCharCode(ch)); - break; - case 0x30: case 0x31: case 0x32: case 0x33: // '0'-'3' - case 0x34: case 0x35: case 0x36: case 0x37: // '4'-'7' - var x = ch & 0x0F; - ch = this.nextChar(); - charBuffered = true; - if (ch >= 0x30 && ch <= 0x37) { // '0'-'7' - x = (x << 3) + (ch & 0x0F); - ch = this.nextChar(); - if (ch >= 0x30 && ch <= 0x37) { // '0'-'7' - charBuffered = false; - x = (x << 3) + (ch & 0x0F); - } - } - strBuf.push(String.fromCharCode(x)); - break; - case 0x0D: // CR - if (this.peekChar() === 0x0A) { // LF - this.nextChar(); - } - break; - case 0x0A: // LF - break; - default: - strBuf.push(String.fromCharCode(ch)); - break; - } - break; - default: - strBuf.push(String.fromCharCode(ch)); - break; - } - if (done) { - break; - } - if (!charBuffered) { - ch = this.nextChar(); + processXRefStream: function XRef_processXRefStream(stream) { + if (!('streamState' in this)) { + // Stores state of the stream as we process it so we can resume + // from middle of stream in case of missing data error + var streamParameters = stream.dict; + var byteWidths = streamParameters.get('W'); + var range = streamParameters.get('Index'); + if (!range) { + range = [0, streamParameters.get('Size')]; } + + this.streamState = { + entryRanges: range, + byteWidths: byteWidths, + entryNum: 0, + streamPos: stream.pos + }; } - return strBuf.join(''); + this.readXRefStream(stream); + delete this.streamState; + + return stream.dict; }, - getName: function Lexer_getName() { - var ch, previousCh; - var strBuf = this.strBuf; - strBuf.length = 0; - while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) { - if (ch === 0x23) { // '#' - ch = this.nextChar(); - if (specialChars[ch]) { - warn('Lexer_getName: ' + - 'NUMBER SIGN (#) should be followed by a hexadecimal number.'); - strBuf.push('#'); - break; + + readXRefStream: function XRef_readXRefStream(stream) { + var i, j; + var streamState = this.streamState; + stream.pos = streamState.streamPos; + + var byteWidths = streamState.byteWidths; + var typeFieldWidth = byteWidths[0]; + var offsetFieldWidth = byteWidths[1]; + var generationFieldWidth = byteWidths[2]; + + var entryRanges = streamState.entryRanges; + while (entryRanges.length > 0) { + var first = entryRanges[0]; + var n = entryRanges[1]; + + if (!isInt(first) || !isInt(n)) { + error('Invalid XRef range fields: ' + first + ', ' + n); + } + if (!isInt(typeFieldWidth) || !isInt(offsetFieldWidth) || + !isInt(generationFieldWidth)) { + error('Invalid XRef entry fields length: ' + first + ', ' + n); + } + for (i = streamState.entryNum; i < n; ++i) { + streamState.entryNum = i; + streamState.streamPos = stream.pos; + + var type = 0, offset = 0, generation = 0; + for (j = 0; j < typeFieldWidth; ++j) { + type = (type << 8) | stream.getByte(); } - var x = toHexDigit(ch); - if (x !== -1) { - previousCh = ch; - ch = this.nextChar(); - var x2 = toHexDigit(ch); - if (x2 === -1) { - warn('Lexer_getName: Illegal digit (' + - String.fromCharCode(ch) +') in hexadecimal number.'); - strBuf.push('#', String.fromCharCode(previousCh)); - if (specialChars[ch]) { - break; - } - strBuf.push(String.fromCharCode(ch)); - continue; - } - strBuf.push(String.fromCharCode((x << 4) | x2)); - } else { - strBuf.push('#', String.fromCharCode(ch)); + // if type field is absent, its default value is 1 + if (typeFieldWidth === 0) { + type = 1; + } + for (j = 0; j < offsetFieldWidth; ++j) { + offset = (offset << 8) | stream.getByte(); + } + for (j = 0; j < generationFieldWidth; ++j) { + generation = (generation << 8) | stream.getByte(); + } + var entry = {}; + entry.offset = offset; + entry.gen = generation; + switch (type) { + case 0: + entry.free = true; + break; + case 1: + entry.uncompressed = true; + break; + case 2: + break; + default: + error('Invalid XRef entry type: ' + type); + } + if (!this.entries[first + i]) { + this.entries[first + i] = entry; } - } else { - strBuf.push(String.fromCharCode(ch)); } + + streamState.entryNum = 0; + streamState.streamPos = stream.pos; + entryRanges.splice(0, 2); } - if (strBuf.length > 127) { - warn('name token is longer than allowed by the spec: ' + strBuf.length); - } - return Name.get(strBuf.join('')); }, - getHexString: function Lexer_getHexString() { - var strBuf = this.strBuf; - strBuf.length = 0; - var ch = this.currentChar; - var isFirstHex = true; - var firstDigit; - var secondDigit; - while (true) { - if (ch < 0) { - warn('Unterminated hex string'); - break; - } else if (ch === 0x3E) { // '>' - this.nextChar(); - break; - } else if (specialChars[ch] === 1) { - ch = this.nextChar(); - continue; - } else { - if (isFirstHex) { - firstDigit = toHexDigit(ch); - if (firstDigit === -1) { - warn('Ignoring invalid character "' + ch + '" in hex string'); - ch = this.nextChar(); - continue; - } - } else { - secondDigit = toHexDigit(ch); - if (secondDigit === -1) { - warn('Ignoring invalid character "' + ch + '" in hex string'); - ch = this.nextChar(); - continue; - } - strBuf.push(String.fromCharCode((firstDigit << 4) | secondDigit)); + + indexObjects: function XRef_indexObjects() { + // Simple scan through the PDF content to find objects, + // trailers and XRef streams. + var TAB = 0x9, LF = 0xA, CR = 0xD, SPACE = 0x20; + var PERCENT = 0x25, LT = 0x3C; + + function readToken(data, offset) { + var token = '', ch = data[offset]; + while (ch !== LF && ch !== CR && ch !== LT) { + if (++offset >= data.length) { + break; } - isFirstHex = !isFirstHex; - ch = this.nextChar(); + token += String.fromCharCode(ch); + ch = data[offset]; } + return token; } - return strBuf.join(''); - }, - getObj: function Lexer_getObj() { - // skip whitespace and comments - var comment = false; - var ch = this.currentChar; - while (true) { - if (ch < 0) { - return EOF; - } - if (comment) { - if (ch === 0x0A || ch === 0x0D) { // LF, CR - comment = false; + function skipUntil(data, offset, what) { + var length = what.length, dataLength = data.length; + var skipped = 0; + // finding byte sequence + while (offset < dataLength) { + var i = 0; + while (i < length && data[offset + i] === what[i]) { + ++i; + } + if (i >= length) { + break; // sequence found } - } else if (ch === 0x25) { // '%' - comment = true; - } else if (specialChars[ch] !== 1) { - break; + offset++; + skipped++; } - ch = this.nextChar(); + return skipped; } + var objRegExp = /^(\d+)\s+(\d+)\s+obj\b/; + var trailerBytes = new Uint8Array([116, 114, 97, 105, 108, 101, 114]); + var startxrefBytes = new Uint8Array([115, 116, 97, 114, 116, 120, 114, + 101, 102]); + var endobjBytes = new Uint8Array([101, 110, 100, 111, 98, 106]); + var xrefBytes = new Uint8Array([47, 88, 82, 101, 102]); - // start reading token - switch (ch | 0) { - case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4' - case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9' - case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.' - return this.getNumber(); - case 0x28: // '(' - return this.getString(); - case 0x2F: // '/' - return this.getName(); - // array punctuation - case 0x5B: // '[' - this.nextChar(); - return Cmd.get('['); - case 0x5D: // ']' - this.nextChar(); - return Cmd.get(']'); - // hex string or dict punctuation - case 0x3C: // '<' - ch = this.nextChar(); - if (ch === 0x3C) { - // dict punctuation - this.nextChar(); - return Cmd.get('<<'); + // Clear out any existing entries, since they may be bogus. + this.entries.length = 0; + + var stream = this.stream; + stream.pos = 0; + var buffer = stream.getBytes(); + var position = stream.start, length = buffer.length; + var trailers = [], xrefStms = []; + while (position < length) { + var ch = buffer[position]; + if (ch === TAB || ch === LF || ch === CR || ch === SPACE) { + ++position; + continue; + } + if (ch === PERCENT) { // %-comment + do { + ++position; + if (position >= length) { + break; + } + ch = buffer[position]; + } while (ch !== LF && ch !== CR); + continue; + } + var token = readToken(buffer, position); + var m; + if (token.indexOf('xref') === 0 && + (token.length === 4 || /\s/.test(token[4]))) { + position += skipUntil(buffer, position, trailerBytes); + trailers.push(position); + position += skipUntil(buffer, position, startxrefBytes); + } else if ((m = objRegExp.exec(token))) { + if (typeof this.entries[m[1]] === 'undefined') { + this.entries[m[1]] = { + offset: position - stream.start, + gen: m[2] | 0, + uncompressed: true + }; } - return this.getHexString(); - // dict punctuation - case 0x3E: // '>' - ch = this.nextChar(); - if (ch === 0x3E) { - this.nextChar(); - return Cmd.get('>>'); + var contentLength = skipUntil(buffer, position, endobjBytes) + 7; + var content = buffer.subarray(position, position + contentLength); + + // checking XRef stream suspect + // (it shall have '/XRef' and next char is not a letter) + var xrefTagOffset = skipUntil(content, 0, xrefBytes); + if (xrefTagOffset < contentLength && + content[xrefTagOffset + 5] < 64) { + xrefStms.push(position - stream.start); + this.xrefstms[position - stream.start] = 1; // Avoid recursion } - return Cmd.get('>'); - case 0x7B: // '{' - this.nextChar(); - return Cmd.get('{'); - case 0x7D: // '}' - this.nextChar(); - return Cmd.get('}'); - case 0x29: // ')' - error('Illegal character: ' + ch); - break; - } - // command - var str = String.fromCharCode(ch); - var knownCommands = this.knownCommands; - var knownCommandFound = knownCommands && knownCommands[str] !== undefined; - while ((ch = this.nextChar()) >= 0 && !specialChars[ch]) { - // stop if known command is found and next character does not make - // the str a command - var possibleCommand = str + String.fromCharCode(ch); - if (knownCommandFound && knownCommands[possibleCommand] === undefined) { - break; - } - if (str.length === 128) { - error('Command token too long: ' + str.length); + position += contentLength; + } else if (token.indexOf('trailer') === 0 && + (token.length === 7 || /\s/.test(token[7]))) { + trailers.push(position); + position += skipUntil(buffer, position, startxrefBytes); + } else { + position += token.length + 1; } - str = possibleCommand; - knownCommandFound = knownCommands && knownCommands[str] !== undefined; } - if (str === 'true') { - return true; + // reading XRef streams + var i, ii; + for (i = 0, ii = xrefStms.length; i < ii; ++i) { + this.startXRefQueue.push(xrefStms[i]); + this.readXRef(/* recoveryMode */ true); } - if (str === 'false') { - return false; + // finding main trailer + var dict; + for (i = 0, ii = trailers.length; i < ii; ++i) { + stream.pos = trailers[i]; + var parser = new Parser(new Lexer(stream), true, this); + var obj = parser.getObj(); + if (!isCmd(obj, 'trailer')) { + continue; + } + // read the trailer dictionary + if (!isDict(dict = parser.getObj())) { + continue; + } + // taking the first one with 'ID' + if (dict.has('ID')) { + return dict; + } } - if (str === 'null') { - return null; + // no tailer with 'ID', taking last one (if exists) + if (dict) { + return dict; } - return Cmd.get(str); + // nothing helps + // calling error() would reject worker with an UnknownErrorException. + throw new InvalidPDFException('Invalid PDF structure'); }, - skipToNextLine: function Lexer_skipToNextLine() { - var ch = this.currentChar; - while (ch >= 0) { - if (ch === 0x0D) { // CR - ch = this.nextChar(); - if (ch === 0x0A) { // LF - this.nextChar(); - } - break; - } else if (ch === 0x0A) { // LF - this.nextChar(); - break; - } - ch = this.nextChar(); - } - } - }; - return Lexer; -})(); + readXRef: function XRef_readXRef(recoveryMode) { + var stream = this.stream; -var Linearization = { - create: function LinearizationCreate(stream) { - function getInt(name, allowZeroValue) { - var obj = linDict.get(name); - if (isInt(obj) && (allowZeroValue ? obj >= 0 : obj > 0)) { - return obj; - } - throw new Error('The "' + name + '" parameter in the linearization ' + - 'dictionary is invalid.'); - } - function getHints() { - var hints = linDict.get('H'), hintsLength, item; - if (isArray(hints) && - ((hintsLength = hints.length) === 2 || hintsLength === 4)) { - for (var index = 0; index < hintsLength; index++) { - if (!(isInt(item = hints[index]) && item > 0)) { - throw new Error('Hint (' + index + - ') in the linearization dictionary is invalid.'); - } - } - return hints; - } - throw new Error('Hint array in the linearization dictionary is invalid.'); - } - var parser = new Parser(new Lexer(stream), false, null); - var obj1 = parser.getObj(); - var obj2 = parser.getObj(); - var obj3 = parser.getObj(); - var linDict = parser.getObj(); - var obj, length; - if (!(isInt(obj1) && isInt(obj2) && isCmd(obj3, 'obj') && isDict(linDict) && - isNum(obj = linDict.get('Linearized')) && obj > 0)) { - return null; // No valid linearization dictionary found. - } else if ((length = getInt('L')) !== stream.length) { - throw new Error('The "L" parameter in the linearization dictionary ' + - 'does not equal the stream length.'); - } - return { - length: length, - hints: getHints(), - objectNumberFirst: getInt('O'), - endFirst: getInt('E'), - numPages: getInt('N'), - mainXRefEntriesOffset: getInt('T'), - pageFirst: (linDict.has('P') ? getInt('P', true) : 0) - }; - } -}; + try { + while (this.startXRefQueue.length) { + var startXRef = this.startXRefQueue[0]; -exports.EOF = EOF; -exports.Lexer = Lexer; -exports.Linearization = Linearization; -exports.Parser = Parser; -exports.isEOF = isEOF; + stream.pos = startXRef + stream.start; -// TODO refactor to remove dependency on stream.js -coreStream._setCoreParser(exports); -})); + var parser = new Parser(new Lexer(stream), true, this); + var obj = parser.getObj(); + var dict; + // Get dictionary + if (isCmd(obj, 'xref')) { + // Parse end-of-file XRef + dict = this.processXRefTable(parser); + if (!this.topDict) { + this.topDict = dict; + } -(function (root, factory) { - { - factory((root.pdfjsCoreCMap = {}), root.pdfjsSharedUtil, - root.pdfjsCorePrimitives, root.pdfjsCoreStream, root.pdfjsCoreParser); - } -}(this, function (exports, sharedUtil, corePrimitives, coreStream, coreParser) { + // Recursively get other XRefs 'XRefStm', if any + obj = dict.get('XRefStm'); + if (isInt(obj)) { + var pos = obj; + // ignore previously loaded xref streams + // (possible infinite recursion) + if (!(pos in this.xrefstms)) { + this.xrefstms[pos] = 1; + this.startXRefQueue.push(pos); + } + } + } else if (isInt(obj)) { + // Parse in-stream XRef + if (!isInt(parser.getObj()) || + !isCmd(parser.getObj(), 'obj') || + !isStream(obj = parser.getObj())) { + error('Invalid XRef stream'); + } + dict = this.processXRefStream(obj); + if (!this.topDict) { + this.topDict = dict; + } + if (!dict) { + error('Failed to read XRef stream'); + } + } else { + error('Invalid XRef stream header'); + } -var Util = sharedUtil.Util; -var assert = sharedUtil.assert; -var error = sharedUtil.error; -var isInt = sharedUtil.isInt; -var isString = sharedUtil.isString; -var warn = sharedUtil.warn; -var isName = corePrimitives.isName; -var isCmd = corePrimitives.isCmd; -var isStream = corePrimitives.isStream; -var StringStream = coreStream.StringStream; -var Lexer = coreParser.Lexer; -var isEOF = coreParser.isEOF; + // Recursively get previous dictionary, if any + obj = dict.get('Prev'); + if (isInt(obj)) { + this.startXRefQueue.push(obj); + } else if (isRef(obj)) { + // The spec says Prev must not be a reference, i.e. "/Prev NNN" + // This is a fallback for non-compliant PDFs, i.e. "/Prev NNN 0 R" + this.startXRefQueue.push(obj.num); + } -var BUILT_IN_CMAPS = [ -// << Start unicode maps. -'Adobe-GB1-UCS2', -'Adobe-CNS1-UCS2', -'Adobe-Japan1-UCS2', -'Adobe-Korea1-UCS2', -// >> End unicode maps. -'78-EUC-H', -'78-EUC-V', -'78-H', -'78-RKSJ-H', -'78-RKSJ-V', -'78-V', -'78ms-RKSJ-H', -'78ms-RKSJ-V', -'83pv-RKSJ-H', -'90ms-RKSJ-H', -'90ms-RKSJ-V', -'90msp-RKSJ-H', -'90msp-RKSJ-V', -'90pv-RKSJ-H', -'90pv-RKSJ-V', -'Add-H', -'Add-RKSJ-H', -'Add-RKSJ-V', -'Add-V', -'Adobe-CNS1-0', -'Adobe-CNS1-1', -'Adobe-CNS1-2', -'Adobe-CNS1-3', -'Adobe-CNS1-4', -'Adobe-CNS1-5', -'Adobe-CNS1-6', -'Adobe-GB1-0', -'Adobe-GB1-1', -'Adobe-GB1-2', -'Adobe-GB1-3', -'Adobe-GB1-4', -'Adobe-GB1-5', -'Adobe-Japan1-0', -'Adobe-Japan1-1', -'Adobe-Japan1-2', -'Adobe-Japan1-3', -'Adobe-Japan1-4', -'Adobe-Japan1-5', -'Adobe-Japan1-6', -'Adobe-Korea1-0', -'Adobe-Korea1-1', -'Adobe-Korea1-2', -'B5-H', -'B5-V', -'B5pc-H', -'B5pc-V', -'CNS-EUC-H', -'CNS-EUC-V', -'CNS1-H', -'CNS1-V', -'CNS2-H', -'CNS2-V', -'ETHK-B5-H', -'ETHK-B5-V', -'ETen-B5-H', -'ETen-B5-V', -'ETenms-B5-H', -'ETenms-B5-V', -'EUC-H', -'EUC-V', -'Ext-H', -'Ext-RKSJ-H', -'Ext-RKSJ-V', -'Ext-V', -'GB-EUC-H', -'GB-EUC-V', -'GB-H', -'GB-V', -'GBK-EUC-H', -'GBK-EUC-V', -'GBK2K-H', -'GBK2K-V', -'GBKp-EUC-H', -'GBKp-EUC-V', -'GBT-EUC-H', -'GBT-EUC-V', -'GBT-H', -'GBT-V', -'GBTpc-EUC-H', -'GBTpc-EUC-V', -'GBpc-EUC-H', -'GBpc-EUC-V', -'H', -'HKdla-B5-H', -'HKdla-B5-V', -'HKdlb-B5-H', -'HKdlb-B5-V', -'HKgccs-B5-H', -'HKgccs-B5-V', -'HKm314-B5-H', -'HKm314-B5-V', -'HKm471-B5-H', -'HKm471-B5-V', -'HKscs-B5-H', -'HKscs-B5-V', -'Hankaku', -'Hiragana', -'KSC-EUC-H', -'KSC-EUC-V', -'KSC-H', -'KSC-Johab-H', -'KSC-Johab-V', -'KSC-V', -'KSCms-UHC-H', -'KSCms-UHC-HW-H', -'KSCms-UHC-HW-V', -'KSCms-UHC-V', -'KSCpc-EUC-H', -'KSCpc-EUC-V', -'Katakana', -'NWP-H', -'NWP-V', -'RKSJ-H', -'RKSJ-V', -'Roman', -'UniCNS-UCS2-H', -'UniCNS-UCS2-V', -'UniCNS-UTF16-H', -'UniCNS-UTF16-V', -'UniCNS-UTF32-H', -'UniCNS-UTF32-V', -'UniCNS-UTF8-H', -'UniCNS-UTF8-V', -'UniGB-UCS2-H', -'UniGB-UCS2-V', -'UniGB-UTF16-H', -'UniGB-UTF16-V', -'UniGB-UTF32-H', -'UniGB-UTF32-V', -'UniGB-UTF8-H', -'UniGB-UTF8-V', -'UniJIS-UCS2-H', -'UniJIS-UCS2-HW-H', -'UniJIS-UCS2-HW-V', -'UniJIS-UCS2-V', -'UniJIS-UTF16-H', -'UniJIS-UTF16-V', -'UniJIS-UTF32-H', -'UniJIS-UTF32-V', -'UniJIS-UTF8-H', -'UniJIS-UTF8-V', -'UniJIS2004-UTF16-H', -'UniJIS2004-UTF16-V', -'UniJIS2004-UTF32-H', -'UniJIS2004-UTF32-V', -'UniJIS2004-UTF8-H', -'UniJIS2004-UTF8-V', -'UniJISPro-UCS2-HW-V', -'UniJISPro-UCS2-V', -'UniJISPro-UTF8-V', -'UniJISX0213-UTF32-H', -'UniJISX0213-UTF32-V', -'UniJISX02132004-UTF32-H', -'UniJISX02132004-UTF32-V', -'UniKS-UCS2-H', -'UniKS-UCS2-V', -'UniKS-UTF16-H', -'UniKS-UTF16-V', -'UniKS-UTF32-H', -'UniKS-UTF32-V', -'UniKS-UTF8-H', -'UniKS-UTF8-V', -'V', -'WP-Symbol']; + this.startXRefQueue.shift(); + } -// CMap, not to be confused with TrueType's cmap. -var CMap = (function CMapClosure() { - function CMap(builtInCMap) { - // Codespace ranges are stored as follows: - // [[1BytePairs], [2BytePairs], [3BytePairs], [4BytePairs]] - // where nBytePairs are ranges e.g. [low1, high1, low2, high2, ...] - this.codespaceRanges = [[], [], [], []]; - this.numCodespaceRanges = 0; - // Map entries have one of two forms. - // - cid chars are 16-bit unsigned integers, stored as integers. - // - bf chars are variable-length byte sequences, stored as strings, with - // one byte per character. - this._map = []; - this.name = ''; - this.vertical = false; - this.useCMap = null; - this.builtInCMap = builtInCMap; - } - CMap.prototype = { - addCodespaceRange: function(n, low, high) { - this.codespaceRanges[n - 1].push(low, high); - this.numCodespaceRanges++; + return this.topDict; + } catch (e) { + if (e instanceof MissingDataException) { + throw e; + } + info('(while reading XRef): ' + e); + } + + if (recoveryMode) { + return; + } + throw new XRefParseException(); }, - mapCidRange: function(low, high, dstLow) { - while (low <= high) { - this._map[low++] = dstLow++; + getEntry: function XRef_getEntry(i) { + var xrefEntry = this.entries[i]; + if (xrefEntry && !xrefEntry.free && xrefEntry.offset) { + return xrefEntry; } + return null; }, - mapBfRange: function(low, high, dstLow) { - var lastByte = dstLow.length - 1; - while (low <= high) { - this._map[low++] = dstLow; - // Only the last byte has to be incremented. - dstLow = dstLow.substr(0, lastByte) + - String.fromCharCode(dstLow.charCodeAt(lastByte) + 1); + fetchIfRef: function XRef_fetchIfRef(obj) { + if (!isRef(obj)) { + return obj; } + return this.fetch(obj); }, - mapBfRangeToArray: function(low, high, array) { - var i = 0, ii = array.length; - while (low <= high && i < ii) { - this._map[low] = array[i++]; - ++low; + fetch: function XRef_fetch(ref, suppressEncryption) { + assert(isRef(ref), 'ref object is not a reference'); + var num = ref.num; + if (num in this.cache) { + var cacheEntry = this.cache[num]; + return cacheEntry; + } + + var xrefEntry = this.getEntry(num); + + // the referenced entry can be free + if (xrefEntry === null) { + return (this.cache[num] = null); + } + + if (xrefEntry.uncompressed) { + xrefEntry = this.fetchUncompressed(ref, xrefEntry, suppressEncryption); + } else { + xrefEntry = this.fetchCompressed(xrefEntry, suppressEncryption); + } + if (isDict(xrefEntry)){ + xrefEntry.objId = ref.toString(); + } else if (isStream(xrefEntry)) { + xrefEntry.dict.objId = ref.toString(); } + return xrefEntry; }, - // This is used for both bf and cid chars. - mapOne: function(src, dst) { - this._map[src] = dst; + fetchUncompressed: function XRef_fetchUncompressed(ref, xrefEntry, + suppressEncryption) { + var gen = ref.gen; + var num = ref.num; + if (xrefEntry.gen !== gen) { + error('inconsistent generation in XRef'); + } + var stream = this.stream.makeSubStream(xrefEntry.offset + + this.stream.start); + var parser = new Parser(new Lexer(stream), true, this); + var obj1 = parser.getObj(); + var obj2 = parser.getObj(); + var obj3 = parser.getObj(); + if (!isInt(obj1) || parseInt(obj1, 10) !== num || + !isInt(obj2) || parseInt(obj2, 10) !== gen || + !isCmd(obj3)) { + error('bad XRef entry'); + } + if (!isCmd(obj3, 'obj')) { + // some bad PDFs use "obj1234" and really mean 1234 + if (obj3.cmd.indexOf('obj') === 0) { + num = parseInt(obj3.cmd.substring(3), 10); + if (!isNaN(num)) { + return num; + } + } + error('bad XRef entry'); + } + if (this.encrypt && !suppressEncryption) { + xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, gen)); + } else { + xrefEntry = parser.getObj(); + } + if (!isStream(xrefEntry)) { + this.cache[num] = xrefEntry; + } + return xrefEntry; }, - lookup: function(code) { - return this._map[code]; + fetchCompressed: function XRef_fetchCompressed(xrefEntry, + suppressEncryption) { + var tableOffset = xrefEntry.offset; + var stream = this.fetch(new Ref(tableOffset, 0)); + if (!isStream(stream)) { + error('bad ObjStm stream'); + } + var first = stream.dict.get('First'); + var n = stream.dict.get('N'); + if (!isInt(first) || !isInt(n)) { + error('invalid first and n parameters for ObjStm stream'); + } + var parser = new Parser(new Lexer(stream), false, this); + parser.allowStreams = true; + var i, entries = [], num, nums = []; + // read the object numbers to populate cache + for (i = 0; i < n; ++i) { + num = parser.getObj(); + if (!isInt(num)) { + error('invalid object number in the ObjStm stream: ' + num); + } + nums.push(num); + var offset = parser.getObj(); + if (!isInt(offset)) { + error('invalid object offset in the ObjStm stream: ' + offset); + } + } + // read stream objects for cache + for (i = 0; i < n; ++i) { + entries.push(parser.getObj()); + num = nums[i]; + var entry = this.entries[num]; + if (entry && entry.offset === tableOffset && entry.gen === i) { + this.cache[num] = entries[i]; + } + } + xrefEntry = entries[xrefEntry.gen]; + if (xrefEntry === undefined) { + error('bad XRef entry for compressed object'); + } + return xrefEntry; }, - contains: function(code) { - return this._map[code] !== undefined; + fetchIfRefAsync: function XRef_fetchIfRefAsync(obj) { + if (!isRef(obj)) { + return Promise.resolve(obj); + } + return this.fetchAsync(obj); }, - forEach: function(callback) { - // Most maps have fewer than 65536 entries, and for those we use normal - // array iteration. But really sparse tables are possible -- e.g. with - // indices in the *billions*. For such tables we use for..in, which isn't - // ideal because it stringifies the indices for all present elements, but - // it does avoid iterating over every undefined entry. - var map = this._map; - var length = map.length; - var i; - if (length <= 0x10000) { - for (i = 0; i < length; i++) { - if (map[i] !== undefined) { - callback(i, map[i]); + fetchAsync: function XRef_fetchAsync(ref, suppressEncryption) { + var streamManager = this.stream.manager; + var xref = this; + return new Promise(function tryFetch(resolve, reject) { + try { + resolve(xref.fetch(ref, suppressEncryption)); + } catch (e) { + if (e instanceof MissingDataException) { + streamManager.requestRange(e.begin, e.end).then(function () { + tryFetch(resolve, reject); + }, reject); + return; } + reject(e); } - } else { - for (i in this._map) { - callback(i, map[i]); + }); + }, + + getCatalogObj: function XRef_getCatalogObj() { + return this.root; + } + }; + + return XRef; +})(); + +/** + * A NameTree is like a Dict but has some advantageous properties, see the + * spec (7.9.6) for more details. + * TODO: implement all the Dict functions and make this more efficent. + */ +var NameTree = (function NameTreeClosure() { + function NameTree(root, xref) { + this.root = root; + this.xref = xref; + } + + NameTree.prototype = { + getAll: function NameTree_getAll() { + var dict = {}; + if (!this.root) { + return dict; + } + var xref = this.xref; + // reading name tree + var processed = new RefSet(); + processed.put(this.root); + var queue = [this.root]; + while (queue.length > 0) { + var i, n; + var obj = xref.fetchIfRef(queue.shift()); + if (!isDict(obj)) { + continue; + } + if (obj.has('Kids')) { + var kids = obj.get('Kids'); + for (i = 0, n = kids.length; i < n; i++) { + var kid = kids[i]; + if (processed.has(kid)) { + error('invalid destinations'); + } + queue.push(kid); + processed.put(kid); + } + continue; + } + var names = obj.get('Names'); + if (names) { + for (i = 0, n = names.length; i < n; i += 2) { + dict[xref.fetchIfRef(names[i])] = xref.fetchIfRef(names[i + 1]); + } } } + return dict; }, - charCodeOf: function(value) { - return this._map.indexOf(value); + get: function NameTree_get(destinationId) { + if (!this.root) { + return null; + } + + var xref = this.xref; + var kidsOrNames = xref.fetchIfRef(this.root); + var loopCount = 0; + var MAX_NAMES_LEVELS = 10; + var l, r, m; + + // Perform a binary search to quickly find the entry that + // contains the named destination we are looking for. + while (kidsOrNames.has('Kids')) { + loopCount++; + if (loopCount > MAX_NAMES_LEVELS) { + warn('Search depth limit for named destionations has been reached.'); + return null; + } + + var kids = kidsOrNames.get('Kids'); + if (!isArray(kids)) { + return null; + } + + l = 0; + r = kids.length - 1; + while (l <= r) { + m = (l + r) >> 1; + var kid = xref.fetchIfRef(kids[m]); + var limits = kid.get('Limits'); + + if (destinationId < xref.fetchIfRef(limits[0])) { + r = m - 1; + } else if (destinationId > xref.fetchIfRef(limits[1])) { + l = m + 1; + } else { + kidsOrNames = xref.fetchIfRef(kids[m]); + break; + } + } + if (l > r) { + return null; + } + } + + // If we get here, then we have found the right entry. Now + // go through the named destinations in the Named dictionary + // until we find the exact destination we're looking for. + var names = kidsOrNames.get('Names'); + if (isArray(names)) { + // Perform a binary search to reduce the lookup time. + l = 0; + r = names.length - 2; + while (l <= r) { + // Check only even indices (0, 2, 4, ...) because the + // odd indices contain the actual D array. + m = (l + r) & ~1; + if (destinationId < xref.fetchIfRef(names[m])) { + r = m - 2; + } else if (destinationId > xref.fetchIfRef(names[m])) { + l = m + 2; + } else { + return xref.fetchIfRef(names[m + 1]); + } + } + } + return null; + } + }; + return NameTree; +})(); + +/** + * "A PDF file can refer to the contents of another file by using a File + * Specification (PDF 1.1)", see the spec (7.11) for more details. + * NOTE: Only embedded files are supported (as part of the attachments support) + * TODO: support the 'URL' file system (with caching if !/V), portable + * collections attributes and related files (/RF) + */ +var FileSpec = (function FileSpecClosure() { + function FileSpec(root, xref) { + if (!root || !isDict(root)) { + return; + } + this.xref = xref; + this.root = root; + if (root.has('FS')) { + this.fs = root.get('FS'); + } + this.description = root.has('Desc') ? + stringToPDFString(root.get('Desc')) : + ''; + if (root.has('RF')) { + warn('Related file specifications are not supported'); + } + this.contentAvailable = true; + if (!root.has('EF')) { + this.contentAvailable = false; + warn('Non-embedded file specifications are not supported'); + } + } + + function pickPlatformItem(dict) { + // Look for the filename in this order: + // UF, F, Unix, Mac, DOS + if (dict.has('UF')) { + return dict.get('UF'); + } else if (dict.has('F')) { + return dict.get('F'); + } else if (dict.has('Unix')) { + return dict.get('Unix'); + } else if (dict.has('Mac')) { + return dict.get('Mac'); + } else if (dict.has('DOS')) { + return dict.get('DOS'); + } else { + return null; + } + } + + FileSpec.prototype = { + get filename() { + if (!this._filename && this.root) { + var filename = pickPlatformItem(this.root) || 'unnamed'; + this._filename = stringToPDFString(filename). + replace(/\\\\/g, '\\'). + replace(/\\\//g, '/'). + replace(/\\/g, '/'); + } + return this._filename; + }, + get content() { + if (!this.contentAvailable) { + return null; + } + if (!this.contentRef && this.root) { + this.contentRef = pickPlatformItem(this.root.get('EF')); + } + var content = null; + if (this.contentRef) { + var xref = this.xref; + var fileObj = xref.fetchIfRef(this.contentRef); + if (fileObj && isStream(fileObj)) { + content = fileObj.getBytes(); + } else { + warn('Embedded file specification points to non-existing/invalid ' + + 'content'); + } + } else { + warn('Embedded file specification does not have a content'); + } + return content; }, + get serializable() { + return { + filename: this.filename, + content: this.content + }; + } + }; + return FileSpec; +})(); - getMap: function() { - return this._map; +/** + * A helper for loading missing data in object graphs. It traverses the graph + * depth first and queues up any objects that have missing data. Once it has + * has traversed as many objects that are available it attempts to bundle the + * missing data requests and then resume from the nodes that weren't ready. + * + * NOTE: It provides protection from circular references by keeping track of + * of loaded references. However, you must be careful not to load any graphs + * that have references to the catalog or other pages since that will cause the + * entire PDF document object graph to be traversed. + */ +var ObjectLoader = (function() { + function mayHaveChildren(value) { + return isRef(value) || isDict(value) || isArray(value) || isStream(value); + } + + function addChildren(node, nodesToVisit) { + var value; + if (isDict(node) || isStream(node)) { + var map; + if (isDict(node)) { + map = node.map; + } else { + map = node.dict.map; + } + for (var key in map) { + value = map[key]; + if (mayHaveChildren(value)) { + nodesToVisit.push(value); + } + } + } else if (isArray(node)) { + for (var i = 0, ii = node.length; i < ii; i++) { + value = node[i]; + if (mayHaveChildren(value)) { + nodesToVisit.push(value); + } + } + } + } + + function ObjectLoader(obj, keys, xref) { + this.obj = obj; + this.keys = keys; + this.xref = xref; + this.refSet = null; + this.capability = null; + } + + ObjectLoader.prototype = { + load: function ObjectLoader_load() { + var keys = this.keys; + this.capability = createPromiseCapability(); + // Don't walk the graph if all the data is already loaded. + if (!(this.xref.stream instanceof ChunkedStream) || + this.xref.stream.getMissingChunks().length === 0) { + this.capability.resolve(); + return this.capability.promise; + } + + this.refSet = new RefSet(); + // Setup the initial nodes to visit. + var nodesToVisit = []; + for (var i = 0; i < keys.length; i++) { + nodesToVisit.push(this.obj[keys[i]]); + } + + this._walk(nodesToVisit); + return this.capability.promise; }, - readCharCode: function(str, offset, out) { - var c = 0; - var codespaceRanges = this.codespaceRanges; - var codespaceRangesLen = this.codespaceRanges.length; - // 9.7.6.2 CMap Mapping - // The code length is at most 4. - for (var n = 0; n < codespaceRangesLen; n++) { - c = ((c << 8) | str.charCodeAt(offset + n)) >>> 0; - // Check each codespace range to see if it falls within. - var codespaceRange = codespaceRanges[n]; - for (var k = 0, kk = codespaceRange.length; k < kk;) { - var low = codespaceRange[k++]; - var high = codespaceRange[k++]; - if (c >= low && c <= high) { - out.charcode = c; - out.length = n + 1; - return; + _walk: function ObjectLoader_walk(nodesToVisit) { + var nodesToRevisit = []; + var pendingRequests = []; + // DFS walk of the object graph. + while (nodesToVisit.length) { + var currentNode = nodesToVisit.pop(); + + // Only references or chunked streams can cause missing data exceptions. + if (isRef(currentNode)) { + // Skip nodes that have already been visited. + if (this.refSet.has(currentNode)) { + continue; + } + try { + var ref = currentNode; + this.refSet.put(ref); + currentNode = this.xref.fetch(currentNode); + } catch (e) { + if (!(e instanceof MissingDataException)) { + throw e; + } + nodesToRevisit.push(currentNode); + pendingRequests.push({ begin: e.begin, end: e.end }); + } + } + if (currentNode && currentNode.getBaseStreams) { + var baseStreams = currentNode.getBaseStreams(); + var foundMissingData = false; + for (var i = 0; i < baseStreams.length; i++) { + var stream = baseStreams[i]; + if (stream.getMissingChunks && stream.getMissingChunks().length) { + foundMissingData = true; + pendingRequests.push({ + begin: stream.start, + end: stream.end + }); + } + } + if (foundMissingData) { + nodesToRevisit.push(currentNode); } } - } - out.charcode = 0; - out.length = 1; - }, - - get length() { - return this._map.length; - }, - get isIdentityCMap() { - if (!(this.name === 'Identity-H' || this.name === 'Identity-V')) { - return false; - } - if (this._map.length !== 0x10000) { - return false; + addChildren(currentNode, nodesToVisit); } - for (var i = 0; i < 0x10000; i++) { - if (this._map[i] !== i) { - return false; - } + + if (pendingRequests.length) { + this.xref.stream.manager.requestRanges(pendingRequests).then( + function pendingRequestCallback() { + nodesToVisit = nodesToRevisit; + for (var i = 0; i < nodesToRevisit.length; i++) { + var node = nodesToRevisit[i]; + // Remove any reference nodes from the currrent refset so they + // aren't skipped when we revist them. + if (isRef(node)) { + this.refSet.remove(node); + } + } + this._walk(nodesToVisit); + }.bind(this), this.capability.reject); + return; } - return true; + // Everything is loaded. + this.refSet = null; + this.capability.resolve(); } }; - return CMap; -})(); - -// A special case of CMap, where the _map array implicitly has a length of -// 65536 and each element is equal to its index. -var IdentityCMap = (function IdentityCMapClosure() { - function IdentityCMap(vertical, n) { - CMap.call(this); - this.vertical = vertical; - this.addCodespaceRange(n, 0, 0xffff); - } - Util.inherit(IdentityCMap, CMap, {}); - IdentityCMap.prototype = { - addCodespaceRange: CMap.prototype.addCodespaceRange, + return ObjectLoader; +})(); - mapCidRange: function(low, high, dstLow) { - error('should not call mapCidRange'); - }, +exports.Catalog = Catalog; +exports.ObjectLoader = ObjectLoader; +exports.XRef = XRef; +})); - mapBfRange: function(low, high, dstLow) { - error('should not call mapBfRange'); - }, - mapBfRangeToArray: function(low, high, array) { - error('should not call mapBfRangeToArray'); - }, +(function (root, factory) { + { + factory((root.pdfjsCorePsParser = {}), root.pdfjsSharedUtil, + root.pdfjsCoreParser); + } +}(this, function (exports, sharedUtil, coreParser) { - mapOne: function(src, dst) { - error('should not call mapCidOne'); - }, +var error = sharedUtil.error; +var EOF = coreParser.EOF; +var Lexer = coreParser.Lexer; - lookup: function(code) { - return (isInt(code) && code <= 0xffff) ? code : undefined; +var PostScriptParser = (function PostScriptParserClosure() { + function PostScriptParser(lexer) { + this.lexer = lexer; + this.operators = []; + this.token = null; + this.prev = null; + } + PostScriptParser.prototype = { + nextToken: function PostScriptParser_nextToken() { + this.prev = this.token; + this.token = this.lexer.getToken(); }, - - contains: function(code) { - return isInt(code) && code <= 0xffff; + accept: function PostScriptParser_accept(type) { + if (this.token.type === type) { + this.nextToken(); + return true; + } + return false; }, - - forEach: function(callback) { - for (var i = 0; i <= 0xffff; i++) { - callback(i, i); + expect: function PostScriptParser_expect(type) { + if (this.accept(type)) { + return true; } + error('Unexpected symbol: found ' + this.token.type + ' expected ' + + type + '.'); }, - - charCodeOf: function(value) { - return (isInt(value) && value <= 0xffff) ? value : -1; + parse: function PostScriptParser_parse() { + this.nextToken(); + this.expect(PostScriptTokenTypes.LBRACE); + this.parseBlock(); + this.expect(PostScriptTokenTypes.RBRACE); + return this.operators; }, - - getMap: function() { - // Sometimes identity maps must be instantiated, but it's rare. - var map = new Array(0x10000); - for (var i = 0; i <= 0xffff; i++) { - map[i] = i; + parseBlock: function PostScriptParser_parseBlock() { + while (true) { + if (this.accept(PostScriptTokenTypes.NUMBER)) { + this.operators.push(this.prev.value); + } else if (this.accept(PostScriptTokenTypes.OPERATOR)) { + this.operators.push(this.prev.value); + } else if (this.accept(PostScriptTokenTypes.LBRACE)) { + this.parseCondition(); + } else { + return; + } } - return map; }, + parseCondition: function PostScriptParser_parseCondition() { + // Add two place holders that will be updated later + var conditionLocation = this.operators.length; + this.operators.push(null, null); - readCharCode: CMap.prototype.readCharCode, - - get length() { - return 0x10000; - }, + this.parseBlock(); + this.expect(PostScriptTokenTypes.RBRACE); + if (this.accept(PostScriptTokenTypes.IF)) { + // The true block is right after the 'if' so it just falls through on + // true else it jumps and skips the true block. + this.operators[conditionLocation] = this.operators.length; + this.operators[conditionLocation + 1] = 'jz'; + } else if (this.accept(PostScriptTokenTypes.LBRACE)) { + var jumpLocation = this.operators.length; + this.operators.push(null, null); + var endOfTrue = this.operators.length; + this.parseBlock(); + this.expect(PostScriptTokenTypes.RBRACE); + this.expect(PostScriptTokenTypes.IFELSE); + // The jump is added at the end of the true block to skip the false + // block. + this.operators[jumpLocation] = this.operators.length; + this.operators[jumpLocation + 1] = 'j'; - get isIdentityCMap() { - error('should not access .isIdentityCMap'); + this.operators[conditionLocation] = endOfTrue; + this.operators[conditionLocation + 1] = 'jz'; + } else { + error('PS Function: error parsing conditional.'); + } } }; - - return IdentityCMap; + return PostScriptParser; })(); -var BinaryCMapReader = (function BinaryCMapReaderClosure() { - function fetchBinaryData(url) { - var nonBinaryRequest = PDFJS.disableWorker; - var request = new XMLHttpRequest(); - request.open('GET', url, false); - if (!nonBinaryRequest) { - try { - request.responseType = 'arraybuffer'; - nonBinaryRequest = request.responseType !== 'arraybuffer'; - } catch (e) { - nonBinaryRequest = true; - } - } - if (nonBinaryRequest && request.overrideMimeType) { - request.overrideMimeType('text/plain; charset=x-user-defined'); - } - request.send(null); - if (nonBinaryRequest ? !request.responseText : !request.response) { - error('Unable to get binary cMap at: ' + url); - } - if (nonBinaryRequest) { - var data = Array.prototype.map.call(request.responseText, function (ch) { - return ch.charCodeAt(0) & 255; - }); - return new Uint8Array(data); - } - return new Uint8Array(request.response); - } +var PostScriptTokenTypes = { + LBRACE: 0, + RBRACE: 1, + NUMBER: 2, + OPERATOR: 3, + IF: 4, + IFELSE: 5 +}; - function hexToInt(a, size) { - var n = 0; - for (var i = 0; i <= size; i++) { - n = (n << 8) | a[i]; - } - return n >>> 0; +var PostScriptToken = (function PostScriptTokenClosure() { + function PostScriptToken(type, value) { + this.type = type; + this.value = value; } - function hexToStr(a, size) { - // This code is hot. Special-case some common values to avoid creating an - // object with subarray(). - if (size === 1) { - return String.fromCharCode(a[0], a[1]); - } - if (size === 3) { - return String.fromCharCode(a[0], a[1], a[2], a[3]); - } - return String.fromCharCode.apply(null, a.subarray(0, size + 1)); - } + var opCache = {}; - function addHex(a, b, size) { - var c = 0; - for (var i = size; i >= 0; i--) { - c += a[i] + b[i]; - a[i] = c & 255; - c >>= 8; + PostScriptToken.getOperator = function PostScriptToken_getOperator(op) { + var opValue = opCache[op]; + if (opValue) { + return opValue; } - } + return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op); + }; - function incHex(a, size) { - var c = 1; - for (var i = size; i >= 0 && c > 0; i--) { - c += a[i]; - a[i] = c & 255; - c >>= 8; - } - } + PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE, + '{'); + PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE, + '}'); + PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF'); + PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE, + 'IFELSE'); + return PostScriptToken; +})(); - var MAX_NUM_SIZE = 16; - var MAX_ENCODED_NUM_SIZE = 19; // ceil(MAX_NUM_SIZE * 7 / 8) +var PostScriptLexer = (function PostScriptLexerClosure() { + function PostScriptLexer(stream) { + this.stream = stream; + this.nextChar(); - function BinaryCMapStream(data) { - this.buffer = data; - this.pos = 0; - this.end = data.length; - this.tmpBuf = new Uint8Array(MAX_ENCODED_NUM_SIZE); + this.strBuf = []; } - - BinaryCMapStream.prototype = { - readByte: function () { - if (this.pos >= this.end) { - return -1; - } - return this.buffer[this.pos++]; - }, - readNumber: function () { - var n = 0; - var last; - do { - var b = this.readByte(); - if (b < 0) { - error('unexpected EOF in bcmap'); - } - last = !(b & 0x80); - n = (n << 7) | (b & 0x7F); - } while (!last); - return n; - }, - readSigned: function () { - var n = this.readNumber(); - return (n & 1) ? ~(n >>> 1) : n >>> 1; - }, - readHex: function (num, size) { - num.set(this.buffer.subarray(this.pos, - this.pos + size + 1)); - this.pos += size + 1; - }, - readHexNumber: function (num, size) { - var last; - var stack = this.tmpBuf, sp = 0; - do { - var b = this.readByte(); - if (b < 0) { - error('unexpected EOF in bcmap'); - } - last = !(b & 0x80); - stack[sp++] = b & 0x7F; - } while (!last); - var i = size, buffer = 0, bufferSize = 0; - while (i >= 0) { - while (bufferSize < 8 && stack.length > 0) { - buffer = (stack[--sp] << bufferSize) | buffer; - bufferSize += 7; - } - num[i] = buffer & 255; - i--; - buffer >>= 8; - bufferSize -= 8; - } - }, - readHexSigned: function (num, size) { - this.readHexNumber(num, size); - var sign = num[size] & 1 ? 255 : 0; - var c = 0; - for (var i = 0; i <= size; i++) { - c = ((c & 1) << 8) | num[i]; - num[i] = (c >> 1) ^ sign; - } + PostScriptLexer.prototype = { + nextChar: function PostScriptLexer_nextChar() { + return (this.currentChar = this.stream.getByte()); }, - readString: function () { - var len = this.readNumber(); - var s = ''; - for (var i = 0; i < len; i++) { - s += String.fromCharCode(this.readNumber()); - } - return s; - } - }; - - function processBinaryCMap(url, cMap, extend) { - var data = fetchBinaryData(url); - var stream = new BinaryCMapStream(data); - - var header = stream.readByte(); - cMap.vertical = !!(header & 1); - - var useCMap = null; - var start = new Uint8Array(MAX_NUM_SIZE); - var end = new Uint8Array(MAX_NUM_SIZE); - var char = new Uint8Array(MAX_NUM_SIZE); - var charCode = new Uint8Array(MAX_NUM_SIZE); - var tmp = new Uint8Array(MAX_NUM_SIZE); - var code; + getToken: function PostScriptLexer_getToken() { + var comment = false; + var ch = this.currentChar; - var b; - while ((b = stream.readByte()) >= 0) { - var type = b >> 5; - if (type === 7) { // metadata, e.g. comment or usecmap - switch (b & 0x1F) { - case 0: - stream.readString(); // skipping comment - break; - case 1: - useCMap = stream.readString(); - break; + // skip comments + while (true) { + if (ch < 0) { + return EOF; } - continue; - } - var sequence = !!(b & 0x10); - var dataSize = b & 15; - - assert(dataSize + 1 <= MAX_NUM_SIZE); - var ucs2DataSize = 1; - var subitemsCount = stream.readNumber(); - var i; - switch (type) { - case 0: // codespacerange - stream.readHex(start, dataSize); - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - cMap.addCodespaceRange(dataSize + 1, hexToInt(start, dataSize), - hexToInt(end, dataSize)); - for (i = 1; i < subitemsCount; i++) { - incHex(end, dataSize); - stream.readHexNumber(start, dataSize); - addHex(start, end, dataSize); - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - cMap.addCodespaceRange(dataSize + 1, hexToInt(start, dataSize), - hexToInt(end, dataSize)); - } - break; - case 1: // notdefrange - stream.readHex(start, dataSize); - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - code = stream.readNumber(); - // undefined range, skipping - for (i = 1; i < subitemsCount; i++) { - incHex(end, dataSize); - stream.readHexNumber(start, dataSize); - addHex(start, end, dataSize); - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - code = stream.readNumber(); - // nop - } - break; - case 2: // cidchar - stream.readHex(char, dataSize); - code = stream.readNumber(); - cMap.mapOne(hexToInt(char, dataSize), code); - for (i = 1; i < subitemsCount; i++) { - incHex(char, dataSize); - if (!sequence) { - stream.readHexNumber(tmp, dataSize); - addHex(char, tmp, dataSize); - } - code = stream.readSigned() + (code + 1); - cMap.mapOne(hexToInt(char, dataSize), code); - } - break; - case 3: // cidrange - stream.readHex(start, dataSize); - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - code = stream.readNumber(); - cMap.mapCidRange(hexToInt(start, dataSize), hexToInt(end, dataSize), - code); - for (i = 1; i < subitemsCount; i++) { - incHex(end, dataSize); - if (!sequence) { - stream.readHexNumber(start, dataSize); - addHex(start, end, dataSize); - } else { - start.set(end); - } - stream.readHexNumber(end, dataSize); - addHex(end, start, dataSize); - code = stream.readNumber(); - cMap.mapCidRange(hexToInt(start, dataSize), hexToInt(end, dataSize), - code); - } - break; - case 4: // bfchar - stream.readHex(char, ucs2DataSize); - stream.readHex(charCode, dataSize); - cMap.mapOne(hexToInt(char, ucs2DataSize), - hexToStr(charCode, dataSize)); - for (i = 1; i < subitemsCount; i++) { - incHex(char, ucs2DataSize); - if (!sequence) { - stream.readHexNumber(tmp, ucs2DataSize); - addHex(char, tmp, ucs2DataSize); - } - incHex(charCode, dataSize); - stream.readHexSigned(tmp, dataSize); - addHex(charCode, tmp, dataSize); - cMap.mapOne(hexToInt(char, ucs2DataSize), - hexToStr(charCode, dataSize)); - } - break; - case 5: // bfrange - stream.readHex(start, ucs2DataSize); - stream.readHexNumber(end, ucs2DataSize); - addHex(end, start, ucs2DataSize); - stream.readHex(charCode, dataSize); - cMap.mapBfRange(hexToInt(start, ucs2DataSize), - hexToInt(end, ucs2DataSize), - hexToStr(charCode, dataSize)); - for (i = 1; i < subitemsCount; i++) { - incHex(end, ucs2DataSize); - if (!sequence) { - stream.readHexNumber(start, ucs2DataSize); - addHex(start, end, ucs2DataSize); - } else { - start.set(end); - } - stream.readHexNumber(end, ucs2DataSize); - addHex(end, start, ucs2DataSize); - stream.readHex(charCode, dataSize); - cMap.mapBfRange(hexToInt(start, ucs2DataSize), - hexToInt(end, ucs2DataSize), - hexToStr(charCode, dataSize)); + if (comment) { + if (ch === 0x0A || ch === 0x0D) { + comment = false; } + } else if (ch === 0x25) { // '%' + comment = true; + } else if (!Lexer.isSpace(ch)) { break; + } + ch = this.nextChar(); + } + switch (ch | 0) { + case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4' + case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9' + case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.' + return new PostScriptToken(PostScriptTokenTypes.NUMBER, + this.getNumber()); + case 0x7B: // '{' + this.nextChar(); + return PostScriptToken.LBRACE; + case 0x7D: // '}' + this.nextChar(); + return PostScriptToken.RBRACE; + } + // operator + var strBuf = this.strBuf; + strBuf.length = 0; + strBuf[0] = String.fromCharCode(ch); + + while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z' + ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) { + strBuf.push(String.fromCharCode(ch)); + } + var str = strBuf.join(''); + switch (str.toLowerCase()) { + case 'if': + return PostScriptToken.IF; + case 'ifelse': + return PostScriptToken.IFELSE; default: - error('Unknown type: ' + type); + return PostScriptToken.getOperator(str); + } + }, + getNumber: function PostScriptLexer_getNumber() { + var ch = this.currentChar; + var strBuf = this.strBuf; + strBuf.length = 0; + strBuf[0] = String.fromCharCode(ch); + + while ((ch = this.nextChar()) >= 0) { + if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9' + ch === 0x2D || ch === 0x2E) { // '-', '.' + strBuf.push(String.fromCharCode(ch)); + } else { break; + } } + var value = parseFloat(strBuf.join('')); + if (isNaN(value)) { + error('Invalid floating point number: ' + value); + } + return value; } + }; + return PostScriptLexer; +})(); - if (useCMap) { - extend(useCMap); - } - return cMap; +exports.PostScriptLexer = PostScriptLexer; +exports.PostScriptParser = PostScriptParser; +})); + + +(function (root, factory) { + { + factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas, + root.pdfjsSharedGlobal); } +}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas, + sharedGlobal, amdRequire) { - function BinaryCMapReader() {} +var InvalidPDFException = sharedUtil.InvalidPDFException; +var MessageHandler = sharedUtil.MessageHandler; +var MissingPDFException = sharedUtil.MissingPDFException; +var PasswordResponses = sharedUtil.PasswordResponses; +var PasswordException = sharedUtil.PasswordException; +var StatTimer = sharedUtil.StatTimer; +var UnexpectedResponseException = sharedUtil.UnexpectedResponseException; +var UnknownErrorException = sharedUtil.UnknownErrorException; +var Util = sharedUtil.Util; +var createPromiseCapability = sharedUtil.createPromiseCapability; +var combineUrl = sharedUtil.combineUrl; +var error = sharedUtil.error; +var deprecated = sharedUtil.deprecated; +var info = sharedUtil.info; +var isArrayBuffer = sharedUtil.isArrayBuffer; +var loadJpegStream = sharedUtil.loadJpegStream; +var stringToBytes = sharedUtil.stringToBytes; +var warn = sharedUtil.warn; +var FontFaceObject = displayFontLoader.FontFaceObject; +var FontLoader = displayFontLoader.FontLoader; +var CanvasGraphics = displayCanvas.CanvasGraphics; +var createScratchCanvas = displayCanvas.createScratchCanvas; +var PDFJS = sharedGlobal.PDFJS; +var globalScope = sharedGlobal.globalScope; - BinaryCMapReader.prototype = { - read: processBinaryCMap - }; +var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536 - return BinaryCMapReader; -})(); -var CMapFactory = (function CMapFactoryClosure() { - function strToInt(str) { - var a = 0; - for (var i = 0; i < str.length; i++) { - a = (a << 8) | str.charCodeAt(i); - } - return a >>> 0; - } +/** + * The maximum allowed image size in total pixels e.g. width * height. Images + * above this value will not be drawn. Use -1 for no limit. + * @var {number} + */ +PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ? + -1 : PDFJS.maxImageSize); - function expectString(obj) { - if (!isString(obj)) { - error('Malformed CMap: expected string.'); - } - } +/** + * The url of where the predefined Adobe CMaps are located. Include trailing + * slash. + * @var {string} + */ +PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); - function expectInt(obj) { - if (!isInt(obj)) { - error('Malformed CMap: expected int.'); - } - } +/** + * Specifies if CMaps are binary packed. + * @var {boolean} + */ +PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; - function parseBfChar(cMap, lexer) { - while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } - if (isCmd(obj, 'endbfchar')) { - return; - } - expectString(obj); - var src = strToInt(obj); - obj = lexer.getObj(); - // TODO are /dstName used? - expectString(obj); - var dst = obj; - cMap.mapOne(src, dst); - } - } +/** + * By default fonts are converted to OpenType fonts and loaded via font face + * rules. If disabled, the font will be rendered using a built in font renderer + * that constructs the glyphs with primitive path commands. + * @var {boolean} + */ +PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ? + false : PDFJS.disableFontFace); - function parseBfRange(cMap, lexer) { - while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } - if (isCmd(obj, 'endbfrange')) { - return; - } - expectString(obj); - var low = strToInt(obj); - obj = lexer.getObj(); - expectString(obj); - var high = strToInt(obj); - obj = lexer.getObj(); - if (isInt(obj) || isString(obj)) { - var dstLow = isInt(obj) ? String.fromCharCode(obj) : obj; - cMap.mapBfRange(low, high, dstLow); - } else if (isCmd(obj, '[')) { - obj = lexer.getObj(); - var array = []; - while (!isCmd(obj, ']') && !isEOF(obj)) { - array.push(obj); - obj = lexer.getObj(); - } - cMap.mapBfRangeToArray(low, high, array); - } else { - break; - } - } - error('Invalid bf range.'); - } +/** + * Path for image resources, mainly for annotation icons. Include trailing + * slash. + * @var {string} + */ +PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? + '' : PDFJS.imageResourcesPath); - function parseCidChar(cMap, lexer) { - while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } - if (isCmd(obj, 'endcidchar')) { - return; - } - expectString(obj); - var src = strToInt(obj); - obj = lexer.getObj(); - expectInt(obj); - var dst = obj; - cMap.mapOne(src, dst); - } - } +/** + * Disable the web worker and run all code on the main thread. This will happen + * automatically if the browser doesn't support workers or sending typed arrays + * to workers. + * @var {boolean} + */ +PDFJS.disableWorker = (PDFJS.disableWorker === undefined ? + false : PDFJS.disableWorker); - function parseCidRange(cMap, lexer) { - while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } - if (isCmd(obj, 'endcidrange')) { - return; - } - expectString(obj); - var low = strToInt(obj); - obj = lexer.getObj(); - expectString(obj); - var high = strToInt(obj); - obj = lexer.getObj(); - expectInt(obj); - var dstLow = obj; - cMap.mapCidRange(low, high, dstLow); - } - } +/** + * Path and filename of the worker file. Required when the worker is enabled in + * development mode. If unspecified in the production build, the worker will be + * loaded based on the location of the pdf.js file. It is recommended that + * the workerSrc is set in a custom application to prevent issues caused by + * third-party frameworks and libraries. + * @var {string} + */ +PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); - function parseCodespaceRange(cMap, lexer) { - while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } - if (isCmd(obj, 'endcodespacerange')) { - return; - } - if (!isString(obj)) { - break; - } - var low = strToInt(obj); - obj = lexer.getObj(); - if (!isString(obj)) { - break; - } - var high = strToInt(obj); - cMap.addCodespaceRange(obj.length, low, high); - } - error('Invalid codespace range.'); - } +/** + * Disable range request loading of PDF files. When enabled and if the server + * supports partial content requests then the PDF will be fetched in chunks. + * Enabled (false) by default. + * @var {boolean} + */ +PDFJS.disableRange = (PDFJS.disableRange === undefined ? + false : PDFJS.disableRange); - function parseWMode(cMap, lexer) { - var obj = lexer.getObj(); - if (isInt(obj)) { - cMap.vertical = !!obj; - } - } +/** + * Disable streaming of PDF file data. By default PDF.js attempts to load PDF + * in chunks. This default behavior can be disabled. + * @var {boolean} + */ +PDFJS.disableStream = (PDFJS.disableStream === undefined ? + false : PDFJS.disableStream); - function parseCMapName(cMap, lexer) { - var obj = lexer.getObj(); - if (isName(obj) && isString(obj.name)) { - cMap.name = obj.name; - } - } +/** + * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js + * will automatically keep fetching more data even if it isn't needed to display + * the current page. This default behavior can be disabled. + * + * NOTE: It is also necessary to disable streaming, see above, + * in order for disabling of pre-fetching to work correctly. + * @var {boolean} + */ +PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? + false : PDFJS.disableAutoFetch); - function parseCMap(cMap, lexer, builtInCMapParams, useCMap) { - var previous; - var embededUseCMap; - objLoop: while (true) { - var obj = lexer.getObj(); - if (isEOF(obj)) { - break; - } else if (isName(obj)) { - if (obj.name === 'WMode') { - parseWMode(cMap, lexer); - } else if (obj.name === 'CMapName') { - parseCMapName(cMap, lexer); - } - previous = obj; - } else if (isCmd(obj)) { - switch (obj.cmd) { - case 'endcmap': - break objLoop; - case 'usecmap': - if (isName(previous)) { - embededUseCMap = previous.name; - } - break; - case 'begincodespacerange': - parseCodespaceRange(cMap, lexer); - break; - case 'beginbfchar': - parseBfChar(cMap, lexer); - break; - case 'begincidchar': - parseCidChar(cMap, lexer); - break; - case 'beginbfrange': - parseBfRange(cMap, lexer); - break; - case 'begincidrange': - parseCidRange(cMap, lexer); - break; - } +/** + * Enables special hooks for debugging PDF.js. + * @var {boolean} + */ +PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); + +/** + * Enables transfer usage in postMessage for ArrayBuffers. + * @var {boolean} + */ +PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? + true : PDFJS.postMessageTransfers); + +/** + * Disables URL.createObjectURL usage. + * @var {boolean} + */ +PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? + false : PDFJS.disableCreateObjectURL); + +/** + * Disables WebGL usage. + * @var {boolean} + */ +PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? + true : PDFJS.disableWebGL); + +/** + * Disables fullscreen support, and by extension Presentation Mode, + * in browsers which support the fullscreen API. + * @var {boolean} + */ +PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ? + false : PDFJS.disableFullscreen); + +/** + * Enables CSS only zooming. + * @var {boolean} + */ +PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? + false : PDFJS.useOnlyCssZoom); + +/** + * Controls the logging level. + * The constants from PDFJS.VERBOSITY_LEVELS should be used: + * - errors + * - warnings [default] + * - infos + * @var {number} + */ +PDFJS.verbosity = (PDFJS.verbosity === undefined ? + PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity); + +/** + * The maximum supported canvas size in total pixels e.g. width * height. + * The default value is 4096 * 4096. Use -1 for no limit. + * @var {number} + */ +PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ? + 16777216 : PDFJS.maxCanvasPixels); + +/** + * (Deprecated) Opens external links in a new window if enabled. + * The default behavior opens external links in the PDF.js window. + * + * NOTE: This property has been deprecated, please use + * `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead. + * @var {boolean} + */ +PDFJS.openExternalLinksInNewWindow = ( + PDFJS.openExternalLinksInNewWindow === undefined ? + false : PDFJS.openExternalLinksInNewWindow); + +/** + * Specifies the |target| attribute for external links. + * The constants from PDFJS.LinkTarget should be used: + * - NONE [default] + * - SELF + * - BLANK + * - PARENT + * - TOP + * @var {number} + */ +PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ? + PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget); + +/** + * Specifies the |rel| attribute for external links. Defaults to stripping + * the referrer. + * @var {string} + */ +PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ? + 'noreferrer' : PDFJS.externalLinkRel); + +/** + * Determines if we can eval strings as JS. Primarily used to improve + * performance for font rendering. + * @var {boolean} + */ +PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ? + true : PDFJS.isEvalSupported); + +/** + * Document initialization / loading parameters object. + * + * @typedef {Object} DocumentInitParameters + * @property {string} url - The URL of the PDF. + * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays + * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded, + * use atob() to convert it to a binary string first. + * @property {Object} httpHeaders - Basic authentication headers. + * @property {boolean} withCredentials - Indicates whether or not cross-site + * Access-Control requests should be made using credentials such as cookies + * or authorization headers. The default is false. + * @property {string} password - For decrypting password-protected PDFs. + * @property {TypedArray} initialData - A typed array with the first portion or + * all of the pdf data. Used by the extension since some data is already + * loaded before the switch to range requests. + * @property {number} length - The PDF file length. It's used for progress + * reports and range requests operations. + * @property {PDFDataRangeTransport} range + * @property {number} rangeChunkSize - Optional parameter to specify + * maximum number of bytes fetched per range request. The default value is + * 2^16 = 65536. + * @property {PDFWorker} worker - The worker that will be used for the loading + * and parsing of the PDF data. + */ + +/** + * @typedef {Object} PDFDocumentStats + * @property {Array} streamTypes - Used stream types in the document (an item + * is set to true if specific stream ID was used in the document). + * @property {Array} fontTypes - Used font type in the document (an item is set + * to true if specific font ID was used in the document). + */ + +/** + * This is the main entry point for loading a PDF and interacting with it. + * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR) + * is used, which means it must follow the same origin rules that any XHR does + * e.g. No cross domain requests without CORS. + * + * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src + * Can be a url to where a PDF is located, a typed array (Uint8Array) + * already populated with data or parameter object. + * + * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used + * if you want to manually serve range requests for data in the PDF. + * + * @param {function} passwordCallback (deprecated) It is used to request a + * password if wrong or no password was provided. The callback receives two + * parameters: function that needs to be called with new password and reason + * (see {PasswordResponses}). + * + * @param {function} progressCallback (deprecated) It is used to be able to + * monitor the loading progress of the PDF file (necessary to implement e.g. + * a loading bar). The callback receives an {Object} with the properties: + * {number} loaded and {number} total. + * + * @return {PDFDocumentLoadingTask} + */ +PDFJS.getDocument = function getDocument(src, + pdfDataRangeTransport, + passwordCallback, + progressCallback) { + var task = new PDFDocumentLoadingTask(); + + // Support of the obsolete arguments (for compatibility with API v1.0) + if (arguments.length > 1) { + deprecated('getDocument is called with pdfDataRangeTransport, ' + + 'passwordCallback or progressCallback argument'); + } + if (pdfDataRangeTransport) { + if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) { + // Not a PDFDataRangeTransport instance, trying to add missing properties. + pdfDataRangeTransport = Object.create(pdfDataRangeTransport); + pdfDataRangeTransport.length = src.length; + pdfDataRangeTransport.initialData = src.initialData; + if (!pdfDataRangeTransport.abort) { + pdfDataRangeTransport.abort = function () {}; } } + src = Object.create(src); + src.range = pdfDataRangeTransport; + } + task.onPassword = passwordCallback || null; + task.onProgress = progressCallback || null; - if (!useCMap && embededUseCMap) { - // Load the usecmap definition from the file only if there wasn't one - // specified. - useCMap = embededUseCMap; + var source; + if (typeof src === 'string') { + source = { url: src }; + } else if (isArrayBuffer(src)) { + source = { data: src }; + } else if (src instanceof PDFDataRangeTransport) { + source = { range: src }; + } else { + if (typeof src !== 'object') { + error('Invalid parameter in getDocument, need either Uint8Array, ' + + 'string or a parameter object'); } - if (useCMap) { - extendCMap(cMap, builtInCMapParams, useCMap); + if (!src.url && !src.data && !src.range) { + error('Invalid parameter object: need either .data, .range or .url'); } + + source = src; } - function extendCMap(cMap, builtInCMapParams, useCMap) { - cMap.useCMap = createBuiltInCMap(useCMap, builtInCMapParams); - // If there aren't any code space ranges defined clone all the parent ones - // into this cMap. - if (cMap.numCodespaceRanges === 0) { - var useCodespaceRanges = cMap.useCMap.codespaceRanges; - for (var i = 0; i < useCodespaceRanges.length; i++) { - cMap.codespaceRanges[i] = useCodespaceRanges[i].slice(); + var params = {}; + var rangeTransport = null; + var worker = null; + for (var key in source) { + if (key === 'url' && typeof window !== 'undefined') { + // The full path is required in the 'url' field. + params[key] = combineUrl(window.location.href, source[key]); + continue; + } else if (key === 'range') { + rangeTransport = source[key]; + continue; + } else if (key === 'worker') { + worker = source[key]; + continue; + } else if (key === 'data' && !(source[key] instanceof Uint8Array)) { + // Converting string or array-like data to Uint8Array. + var pdfBytes = source[key]; + if (typeof pdfBytes === 'string') { + params[key] = stringToBytes(pdfBytes); + } else if (typeof pdfBytes === 'object' && pdfBytes !== null && + !isNaN(pdfBytes.length)) { + params[key] = new Uint8Array(pdfBytes); + } else if (isArrayBuffer(pdfBytes)) { + params[key] = new Uint8Array(pdfBytes); + } else { + error('Invalid PDF binary data: either typed array, string or ' + + 'array-like object is expected in the data property.'); } - cMap.numCodespaceRanges = cMap.useCMap.numCodespaceRanges; + continue; } - // Merge the map into the current one, making sure not to override - // any previously defined entries. - cMap.useCMap.forEach(function(key, value) { - if (!cMap.contains(key)) { - cMap.mapOne(key, cMap.useCMap.lookup(key)); - } - }); + params[key] = source[key]; } - function parseBinaryCMap(name, builtInCMapParams) { - var url = builtInCMapParams.url + name + '.bcmap'; - var cMap = new CMap(true); - new BinaryCMapReader().read(url, cMap, function (useCMap) { - extendCMap(cMap, builtInCMapParams, useCMap); - }); - return cMap; - } + params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE; - function createBuiltInCMap(name, builtInCMapParams) { - if (name === 'Identity-H') { - return new IdentityCMap(false, 2); - } else if (name === 'Identity-V') { - return new IdentityCMap(true, 2); - } - if (BUILT_IN_CMAPS.indexOf(name) === -1) { - error('Unknown cMap name: ' + name); + if (!worker) { + // Worker was not provided -- creating and owning our own. + worker = new PDFWorker(); + task._worker = worker; + } + var docId = task.docId; + worker.promise.then(function () { + if (task.destroyed) { + throw new Error('Loading aborted'); } - assert(builtInCMapParams, 'built-in cMap parameters are not provided'); + return _fetchDocument(worker, params, rangeTransport, docId).then( + function (workerId) { + if (task.destroyed) { + throw new Error('Loading aborted'); + } + var messageHandler = new MessageHandler(docId, workerId, worker.port); + messageHandler.send('Ready', null); + var transport = new WorkerTransport(messageHandler, task, rangeTransport); + task._transport = transport; + }); + }).catch(task._capability.reject); - if (builtInCMapParams.packed) { - return parseBinaryCMap(name, builtInCMapParams); - } + return task; +}; - var request = new XMLHttpRequest(); - var url = builtInCMapParams.url + name; - request.open('GET', url, false); - request.send(null); - if (!request.responseText) { - error('Unable to get cMap at: ' + url); - } - var cMap = new CMap(true); - var lexer = new Lexer(new StringStream(request.responseText)); - parseCMap(cMap, lexer, builtInCMapParams, null); - return cMap; +/** + * Starts fetching of specified PDF document/data. + * @param {PDFWorker} worker + * @param {Object} source + * @param {PDFDataRangeTransport} pdfDataRangeTransport + * @param {string} docId Unique document id, used as MessageHandler id. + * @returns {Promise} The promise, which is resolved when worker id of + * MessageHandler is known. + * @private + */ +function _fetchDocument(worker, source, pdfDataRangeTransport, docId) { + if (worker.destroyed) { + return Promise.reject(new Error('Worker was destroyed')); } - return { - create: function (encoding, builtInCMapParams, useCMap) { - if (isName(encoding)) { - return createBuiltInCMap(encoding.name, builtInCMapParams); - } else if (isStream(encoding)) { - var cMap = new CMap(); - var lexer = new Lexer(encoding); - try { - parseCMap(cMap, lexer, builtInCMapParams, useCMap); - } catch (e) { - warn('Invalid CMap data. ' + e); - } - if (cMap.isIdentityCMap) { - return createBuiltInCMap(cMap.name, builtInCMapParams); - } - return cMap; - } - error('Encoding required.'); + source.disableAutoFetch = PDFJS.disableAutoFetch; + source.disableStream = PDFJS.disableStream; + source.chunkedViewerLoading = !!pdfDataRangeTransport; + if (pdfDataRangeTransport) { + source.length = pdfDataRangeTransport.length; + source.initialData = pdfDataRangeTransport.initialData; + } + return worker.messageHandler.sendWithPromise('GetDocRequest', { + docId: docId, + source: source, + disableRange: PDFJS.disableRange, + maxImageSize: PDFJS.maxImageSize, + cMapUrl: PDFJS.cMapUrl, + cMapPacked: PDFJS.cMapPacked, + disableFontFace: PDFJS.disableFontFace, + disableCreateObjectURL: PDFJS.disableCreateObjectURL, + verbosity: PDFJS.verbosity + }).then(function (workerId) { + if (worker.destroyed) { + throw new Error('Worker was destroyed'); } - }; -})(); - -exports.CMap = CMap; -exports.CMapFactory = CMapFactory; -exports.IdentityCMap = IdentityCMap; -})); + return workerId; + }); +} +/** + * PDF document loading operation. + * @class + * @alias PDFDocumentLoadingTask + */ +var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() { + var nextDocumentId = 0; -(function (root, factory) { - { - factory((root.pdfjsCoreObj = {}), root.pdfjsSharedUtil, - root.pdfjsCorePrimitives, root.pdfjsCoreCrypto, root.pdfjsCoreParser, - root.pdfjsCoreChunkedStream); - } -}(this, function (exports, sharedUtil, corePrimitives, coreCrypto, coreParser, - coreChunkedStream) { + /** @constructs PDFDocumentLoadingTask */ + function PDFDocumentLoadingTask() { + this._capability = createPromiseCapability(); + this._transport = null; + this._worker = null; -var InvalidPDFException = sharedUtil.InvalidPDFException; -var MissingDataException = sharedUtil.MissingDataException; -var XRefParseException = sharedUtil.XRefParseException; -var assert = sharedUtil.assert; -var bytesToString = sharedUtil.bytesToString; -var createPromiseCapability = sharedUtil.createPromiseCapability; -var error = sharedUtil.error; -var info = sharedUtil.info; -var isArray = sharedUtil.isArray; -var isInt = sharedUtil.isInt; -var isString = sharedUtil.isString; -var shadow = sharedUtil.shadow; -var stringToPDFString = sharedUtil.stringToPDFString; -var stringToUTF8String = sharedUtil.stringToUTF8String; -var warn = sharedUtil.warn; -var Ref = corePrimitives.Ref; -var RefSet = corePrimitives.RefSet; -var RefSetCache = corePrimitives.RefSetCache; -var isName = corePrimitives.isName; -var isCmd = corePrimitives.isCmd; -var isDict = corePrimitives.isDict; -var isRef = corePrimitives.isRef; -var isStream = corePrimitives.isStream; -var CipherTransformFactory = coreCrypto.CipherTransformFactory; -var Lexer = coreParser.Lexer; -var Parser = coreParser.Parser; -var ChunkedStream = coreChunkedStream.ChunkedStream; + /** + * Unique document loading task id -- used in MessageHandlers. + * @type {string} + */ + this.docId = 'd' + (nextDocumentId++); -var Catalog = (function CatalogClosure() { - function Catalog(pdfManager, xref, pageFactory) { - this.pdfManager = pdfManager; - this.xref = xref; - this.catDict = xref.getCatalogObj(); - this.fontCache = new RefSetCache(); - assert(isDict(this.catDict), - 'catalog object is not a dictionary'); + /** + * Shows if loading task is destroyed. + * @type {boolean} + */ + this.destroyed = false; - // TODO refactor to move getPage() to the PDFDocument. - this.pageFactory = pageFactory; - this.pagePromises = []; - } + /** + * Callback to request a password if wrong or no password was provided. + * The callback receives two parameters: function that needs to be called + * with new password and reason (see {PasswordResponses}). + */ + this.onPassword = null; - Catalog.prototype = { - get metadata() { - var streamRef = this.catDict.getRaw('Metadata'); - if (!isRef(streamRef)) { - return shadow(this, 'metadata', null); - } + /** + * Callback to be able to monitor the loading progress of the PDF file + * (necessary to implement e.g. a loading bar). The callback receives + * an {Object} with the properties: {number} loaded and {number} total. + */ + this.onProgress = null; - var encryptMetadata = (!this.xref.encrypt ? false : - this.xref.encrypt.encryptMetadata); + /** + * Callback to when unsupported feature is used. The callback receives + * an {PDFJS.UNSUPPORTED_FEATURES} argument. + */ + this.onUnsupportedFeature = null; + } - var stream = this.xref.fetch(streamRef, !encryptMetadata); - var metadata; - if (stream && isDict(stream.dict)) { - var type = stream.dict.get('Type'); - var subtype = stream.dict.get('Subtype'); + PDFDocumentLoadingTask.prototype = + /** @lends PDFDocumentLoadingTask.prototype */ { + /** + * @return {Promise} + */ + get promise() { + return this._capability.promise; + }, - if (isName(type) && isName(subtype) && - type.name === 'Metadata' && subtype.name === 'XML') { - // XXX: This should examine the charset the XML document defines, - // however since there are currently no real means to decode - // arbitrary charsets, let's just hope that the author of the PDF - // was reasonable enough to stick with the XML default charset, - // which is UTF-8. - try { - metadata = stringToUTF8String(bytesToString(stream.getBytes())); - } catch (e) { - info('Skipping invalid metadata.'); - } - } - } + /** + * Aborts all network requests and destroys worker. + * @return {Promise} A promise that is resolved after destruction activity + * is completed. + */ + destroy: function () { + this.destroyed = true; - return shadow(this, 'metadata', metadata); - }, - get toplevelPagesDict() { - var pagesObj = this.catDict.get('Pages'); - assert(isDict(pagesObj), 'invalid top-level pages dictionary'); - // shadow the prototype getter - return shadow(this, 'toplevelPagesDict', pagesObj); - }, - get documentOutline() { - var obj = null; - try { - obj = this.readDocumentOutline(); - } catch (ex) { - if (ex instanceof MissingDataException) { - throw ex; - } - warn('Unable to read document outline'); - } - return shadow(this, 'documentOutline', obj); - }, - readDocumentOutline: function Catalog_readDocumentOutline() { - var xref = this.xref; - var obj = this.catDict.get('Outlines'); - var root = { items: [] }; - if (isDict(obj)) { - obj = obj.getRaw('First'); - var processed = new RefSet(); - if (isRef(obj)) { - var queue = [{obj: obj, parent: root}]; - // to avoid recursion keeping track of the items - // in the processed dictionary - processed.put(obj); - while (queue.length > 0) { - var i = queue.shift(); - var outlineDict = xref.fetchIfRef(i.obj); - if (outlineDict === null) { - continue; - } - if (!outlineDict.has('Title')) { - error('Invalid outline item'); - } - var dest = outlineDict.get('A'); - if (dest) { - dest = dest.get('D'); - } else if (outlineDict.has('Dest')) { - dest = outlineDict.getRaw('Dest'); - if (isName(dest)) { - dest = dest.name; - } - } - var title = outlineDict.get('Title'); - var outlineItem = { - dest: dest, - title: stringToPDFString(title), - color: outlineDict.get('C') || [0, 0, 0], - count: outlineDict.get('Count'), - bold: !!(outlineDict.get('F') & 2), - italic: !!(outlineDict.get('F') & 1), - items: [] - }; - i.parent.items.push(outlineItem); - obj = outlineDict.getRaw('First'); - if (isRef(obj) && !processed.has(obj)) { - queue.push({obj: obj, parent: outlineItem}); - processed.put(obj); - } - obj = outlineDict.getRaw('Next'); - if (isRef(obj) && !processed.has(obj)) { - queue.push({obj: obj, parent: i.parent}); - processed.put(obj); - } - } + var transportDestroyed = !this._transport ? Promise.resolve() : + this._transport.destroy(); + return transportDestroyed.then(function () { + this._transport = null; + if (this._worker) { + this._worker.destroy(); + this._worker = null; } - } - return (root.items.length > 0 ? root.items : null); - }, - get numPages() { - var obj = this.toplevelPagesDict.get('Count'); - assert( - isInt(obj), - 'page count in top level pages object is not an integer' - ); - // shadow the prototype getter - return shadow(this, 'num', obj); + }.bind(this)); }, - get destinations() { - function fetchDestination(dest) { - return isDict(dest) ? dest.get('D') : dest; - } - var xref = this.xref; - var dests = {}, nameTreeRef, nameDictionaryRef; - var obj = this.catDict.get('Names'); - if (obj && obj.has('Dests')) { - nameTreeRef = obj.getRaw('Dests'); - } else if (this.catDict.has('Dests')) { - nameDictionaryRef = this.catDict.get('Dests'); - } + /** + * Registers callbacks to indicate the document loading completion. + * + * @param {function} onFulfilled The callback for the loading completion. + * @param {function} onRejected The callback for the loading failure. + * @return {Promise} A promise that is resolved after the onFulfilled or + * onRejected callback. + */ + then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) { + return this.promise.then.apply(this.promise, arguments); + } + }; - if (nameDictionaryRef) { - // reading simple destination dictionary - obj = nameDictionaryRef; - obj.forEach(function catalogForEach(key, value) { - if (!value) { - return; - } - dests[key] = fetchDestination(value); - }); - } - if (nameTreeRef) { - var nameTree = new NameTree(nameTreeRef, xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; - } - dests[name] = fetchDestination(names[name]); - } - } - return shadow(this, 'destinations', dests); - }, - getDestination: function Catalog_getDestination(destinationId) { - function fetchDestination(dest) { - return isDict(dest) ? dest.get('D') : dest; - } + return PDFDocumentLoadingTask; +})(); - var xref = this.xref; - var dest = null, nameTreeRef, nameDictionaryRef; - var obj = this.catDict.get('Names'); - if (obj && obj.has('Dests')) { - nameTreeRef = obj.getRaw('Dests'); - } else if (this.catDict.has('Dests')) { - nameDictionaryRef = this.catDict.get('Dests'); - } +/** + * Abstract class to support range requests file loading. + * @class + * @alias PDFJS.PDFDataRangeTransport + * @param {number} length + * @param {Uint8Array} initialData + */ +var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() { + function PDFDataRangeTransport(length, initialData) { + this.length = length; + this.initialData = initialData; + + this._rangeListeners = []; + this._progressListeners = []; + this._progressiveReadListeners = []; + this._readyCapability = createPromiseCapability(); + } + PDFDataRangeTransport.prototype = + /** @lends PDFDataRangeTransport.prototype */ { + addRangeListener: + function PDFDataRangeTransport_addRangeListener(listener) { + this._rangeListeners.push(listener); + }, - if (nameDictionaryRef) { // Simple destination dictionary. - var value = nameDictionaryRef.get(destinationId); - if (value) { - dest = fetchDestination(value); - } - } - if (nameTreeRef) { - var nameTree = new NameTree(nameTreeRef, xref); - dest = fetchDestination(nameTree.get(destinationId)); - } - return dest; + addProgressListener: + function PDFDataRangeTransport_addProgressListener(listener) { + this._progressListeners.push(listener); }, - get attachments() { - var xref = this.xref; - var attachments = null, nameTreeRef; - var obj = this.catDict.get('Names'); - if (obj) { - nameTreeRef = obj.getRaw('EmbeddedFiles'); - } - if (nameTreeRef) { - var nameTree = new NameTree(nameTreeRef, xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; - } - var fs = new FileSpec(names[name], xref); - if (!attachments) { - attachments = {}; - } - attachments[stringToPDFString(name)] = fs.serializable; - } - } - return shadow(this, 'attachments', attachments); + addProgressiveReadListener: + function PDFDataRangeTransport_addProgressiveReadListener(listener) { + this._progressiveReadListeners.push(listener); }, - get javaScript() { - var xref = this.xref; - var obj = this.catDict.get('Names'); - var javaScript = []; - function appendIfJavaScriptDict(jsDict) { - var type = jsDict.get('S'); - if (!isName(type) || type.name !== 'JavaScript') { - return; - } - var js = jsDict.get('JS'); - if (isStream(js)) { - js = bytesToString(js.getBytes()); - } else if (!isString(js)) { - return; - } - javaScript.push(stringToPDFString(js)); - } - if (obj && obj.has('JavaScript')) { - var nameTree = new NameTree(obj.getRaw('JavaScript'), xref); - var names = nameTree.getAll(); - for (var name in names) { - if (!names.hasOwnProperty(name)) { - continue; - } - // We don't really use the JavaScript right now. This code is - // defensive so we don't cause errors on document load. - var jsDict = names[name]; - if (isDict(jsDict)) { - appendIfJavaScriptDict(jsDict); - } - } + onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) { + var listeners = this._rangeListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](begin, chunk); } + }, - // Append OpenAction actions to javaScript array - var openactionDict = this.catDict.get('OpenAction'); - if (isDict(openactionDict, 'Action')) { - var actionType = openactionDict.get('S'); - if (isName(actionType) && actionType.name === 'Named') { - // The named Print action is not a part of the PDF 1.7 specification, - // but is supported by many PDF readers/writers (including Adobe's). - var action = openactionDict.get('N'); - if (isName(action) && action.name === 'Print') { - javaScript.push('print({});'); - } - } else { - appendIfJavaScriptDict(openactionDict); + onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) { + this._readyCapability.promise.then(function () { + var listeners = this._progressListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](loaded); } - } - - return shadow(this, 'javaScript', javaScript); + }.bind(this)); }, - cleanup: function Catalog_cleanup() { - var promises = []; - this.fontCache.forEach(function (promise) { - promises.push(promise); - }); - return Promise.all(promises).then(function (translatedFonts) { - for (var i = 0, ii = translatedFonts.length; i < ii; i++) { - var font = translatedFonts[i].dict; - delete font.translated; + onDataProgressiveRead: + function PDFDataRangeTransport_onDataProgress(chunk) { + this._readyCapability.promise.then(function () { + var listeners = this._progressiveReadListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](chunk); } - this.fontCache.clear(); }.bind(this)); }, - getPage: function Catalog_getPage(pageIndex) { - if (!(pageIndex in this.pagePromises)) { - this.pagePromises[pageIndex] = this.getPageDict(pageIndex).then( - function (a) { - var dict = a[0]; - var ref = a[1]; - return this.pageFactory.createPage(pageIndex, dict, ref, - this.fontCache); - }.bind(this) - ); - } - return this.pagePromises[pageIndex]; + transportReady: function PDFDataRangeTransport_transportReady() { + this._readyCapability.resolve(); }, - getPageDict: function Catalog_getPageDict(pageIndex) { - var capability = createPromiseCapability(); - var nodesToVisit = [this.catDict.getRaw('Pages')]; - var currentPageIndex = 0; - var xref = this.xref; - var checkAllKids = false; - - function next() { - while (nodesToVisit.length) { - var currentNode = nodesToVisit.pop(); + requestDataRange: + function PDFDataRangeTransport_requestDataRange(begin, end) { + throw new Error('Abstract method PDFDataRangeTransport.requestDataRange'); + }, - if (isRef(currentNode)) { - xref.fetchAsync(currentNode).then(function (obj) { - if (isDict(obj, 'Page') || (isDict(obj) && !obj.has('Kids'))) { - if (pageIndex === currentPageIndex) { - capability.resolve([obj, currentNode]); - } else { - currentPageIndex++; - next(); - } - return; - } - nodesToVisit.push(obj); - next(); - }, capability.reject); - return; - } + abort: function PDFDataRangeTransport_abort() { + } + }; + return PDFDataRangeTransport; +})(); - // Must be a child page dictionary. - assert( - isDict(currentNode), - 'page dictionary kid reference points to wrong type of object' - ); - var count = currentNode.get('Count'); - // If the current node doesn't have any children, avoid getting stuck - // in an empty node further down in the tree (see issue5644.pdf). - if (count === 0) { - checkAllKids = true; - } - // Skip nodes where the page can't be. - if (currentPageIndex + count <= pageIndex) { - currentPageIndex += count; - continue; - } +PDFJS.PDFDataRangeTransport = PDFDataRangeTransport; - var kids = currentNode.get('Kids'); - assert(isArray(kids), 'page dictionary kids object is not an array'); - if (!checkAllKids && count === kids.length) { - // Nodes that don't have the page have been skipped and this is the - // bottom of the tree which means the page requested must be a - // descendant of this pages node. Ideally we would just resolve the - // promise with the page ref here, but there is the case where more - // pages nodes could link to single a page (see issue 3666 pdf). To - // handle this push it back on the queue so if it is a pages node it - // will be descended into. - nodesToVisit = [kids[pageIndex - currentPageIndex]]; - currentPageIndex = pageIndex; - continue; - } else { - for (var last = kids.length - 1; last >= 0; last--) { - nodesToVisit.push(kids[last]); - } - } - } - capability.reject('Page index ' + pageIndex + ' not found.'); - } - next(); - return capability.promise; +/** + * Proxy to a PDFDocument in the worker thread. Also, contains commonly used + * properties that can be read synchronously. + * @class + * @alias PDFDocumentProxy + */ +var PDFDocumentProxy = (function PDFDocumentProxyClosure() { + function PDFDocumentProxy(pdfInfo, transport, loadingTask) { + this.pdfInfo = pdfInfo; + this.transport = transport; + this.loadingTask = loadingTask; + } + PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ { + /** + * @return {number} Total number of pages the PDF contains. + */ + get numPages() { + return this.pdfInfo.numPages; + }, + /** + * @return {string} A unique ID to identify a PDF. Not guaranteed to be + * unique. + */ + get fingerprint() { + return this.pdfInfo.fingerprint; + }, + /** + * @param {number} pageNumber The page number to get. The first page is 1. + * @return {Promise} A promise that is resolved with a {@link PDFPageProxy} + * object. + */ + getPage: function PDFDocumentProxy_getPage(pageNumber) { + return this.transport.getPage(pageNumber); + }, + /** + * @param {{num: number, gen: number}} ref The page reference. Must have + * the 'num' and 'gen' properties. + * @return {Promise} A promise that is resolved with the page index that is + * associated with the reference. + */ + getPageIndex: function PDFDocumentProxy_getPageIndex(ref) { + return this.transport.getPageIndex(ref); + }, + /** + * @return {Promise} A promise that is resolved with a lookup table for + * mapping named destinations to reference numbers. + * + * This can be slow for large documents: use getDestination instead + */ + getDestinations: function PDFDocumentProxy_getDestinations() { + return this.transport.getDestinations(); + }, + /** + * @param {string} id The named destination to get. + * @return {Promise} A promise that is resolved with all information + * of the given named destination. + */ + getDestination: function PDFDocumentProxy_getDestination(id) { + return this.transport.getDestination(id); + }, + /** + * @return {Promise} A promise that is resolved with a lookup table for + * mapping named attachments to their content. + */ + getAttachments: function PDFDocumentProxy_getAttachments() { + return this.transport.getAttachments(); + }, + /** + * @return {Promise} A promise that is resolved with an array of all the + * JavaScript strings in the name tree. + */ + getJavaScript: function PDFDocumentProxy_getJavaScript() { + return this.transport.getJavaScript(); + }, + /** + * @return {Promise} A promise that is resolved with an {Array} that is a + * tree outline (if it has one) of the PDF. The tree is in the format of: + * [ + * { + * title: string, + * bold: boolean, + * italic: boolean, + * color: rgb array, + * dest: dest obj, + * items: array of more items like this + * }, + * ... + * ]. + */ + getOutline: function PDFDocumentProxy_getOutline() { + return this.transport.getOutline(); + }, + /** + * @return {Promise} A promise that is resolved with an {Object} that has + * info and metadata properties. Info is an {Object} filled with anything + * available in the information dictionary and similarly metadata is a + * {Metadata} object with information from the metadata section of the PDF. + */ + getMetadata: function PDFDocumentProxy_getMetadata() { + return this.transport.getMetadata(); + }, + /** + * @return {Promise} A promise that is resolved with a TypedArray that has + * the raw data from the PDF. + */ + getData: function PDFDocumentProxy_getData() { + return this.transport.getData(); + }, + /** + * @return {Promise} A promise that is resolved when the document's data + * is loaded. It is resolved with an {Object} that contains the length + * property that indicates size of the PDF data in bytes. + */ + getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() { + return this.transport.downloadInfoCapability.promise; + }, + /** + * @return {Promise} A promise this is resolved with current stats about + * document structures (see {@link PDFDocumentStats}). + */ + getStats: function PDFDocumentProxy_getStats() { + return this.transport.getStats(); + }, + /** + * Cleans up resources allocated by the document, e.g. created @font-face. + */ + cleanup: function PDFDocumentProxy_cleanup() { + this.transport.startCleanup(); }, + /** + * Destroys current document instance and terminates worker. + */ + destroy: function PDFDocumentProxy_destroy() { + return this.loadingTask.destroy(); + } + }; + return PDFDocumentProxy; +})(); - getPageIndex: function Catalog_getPageIndex(ref) { - // The page tree nodes have the count of all the leaves below them. To get - // how many pages are before we just have to walk up the tree and keep - // adding the count of siblings to the left of the node. - var xref = this.xref; - function pagesBeforeRef(kidRef) { - var total = 0; - var parentRef; - return xref.fetchAsync(kidRef).then(function (node) { - if (!node) { - return null; - } - parentRef = node.getRaw('Parent'); - return node.getAsync('Parent'); - }).then(function (parent) { - if (!parent) { - return null; - } - return parent.getAsync('Kids'); - }).then(function (kids) { - if (!kids) { - return null; - } - var kidPromises = []; - var found = false; - for (var i = 0; i < kids.length; i++) { - var kid = kids[i]; - assert(isRef(kid), 'kids must be a ref'); - if (kid.num === kidRef.num) { - found = true; - break; - } - kidPromises.push(xref.fetchAsync(kid).then(function (kid) { - if (kid.has('Count')) { - var count = kid.get('Count'); - total += count; - } else { // page leaf node - total++; - } - })); - } - if (!found) { - error('kid ref not found in parents kids'); - } - return Promise.all(kidPromises).then(function () { - return [total, parentRef]; - }); - }); +/** + * Page getTextContent parameters. + * + * @typedef {Object} getTextContentParameters + * @param {boolean} normalizeWhitespace - replaces all occurrences of + * whitespace with standard spaces (0x20). The default value is `false`. + */ + +/** + * Page text content. + * + * @typedef {Object} TextContent + * @property {array} items - array of {@link TextItem} + * @property {Object} styles - {@link TextStyles} objects, indexed by font + * name. + */ + +/** + * Page text content part. + * + * @typedef {Object} TextItem + * @property {string} str - text content. + * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'. + * @property {array} transform - transformation matrix. + * @property {number} width - width in device space. + * @property {number} height - height in device space. + * @property {string} fontName - font name used by pdf.js for converted font. + */ + +/** + * Text style. + * + * @typedef {Object} TextStyle + * @property {number} ascent - font ascent. + * @property {number} descent - font descent. + * @property {boolean} vertical - text is in vertical mode. + * @property {string} fontFamily - possible font family + */ + +/** + * Page annotation parameters. + * + * @typedef {Object} GetAnnotationsParameters + * @param {string} intent - Determines the annotations that will be fetched, + * can be either 'display' (viewable annotations) or 'print' + * (printable annotations). + * If the parameter is omitted, all annotations are fetched. + */ + +/** + * Page render parameters. + * + * @typedef {Object} RenderParameters + * @property {Object} canvasContext - A 2D context of a DOM Canvas object. + * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by + * calling of PDFPage.getViewport method. + * @property {string} intent - Rendering intent, can be 'display' or 'print' + * (default value is 'display'). + * @property {Array} transform - (optional) Additional transform, applied + * just before viewport transform. + * @property {Object} imageLayer - (optional) An object that has beginLayout, + * endLayout and appendImage functions. + * @property {function} continueCallback - (deprecated) A function that will be + * called each time the rendering is paused. To continue + * rendering call the function that is the first argument + * to the callback. + */ + +/** + * PDF page operator list. + * + * @typedef {Object} PDFOperatorList + * @property {Array} fnArray - Array containing the operator functions. + * @property {Array} argsArray - Array containing the arguments of the + * functions. + */ + +/** + * Proxy to a PDFPage in the worker thread. + * @class + * @alias PDFPageProxy + */ +var PDFPageProxy = (function PDFPageProxyClosure() { + function PDFPageProxy(pageIndex, pageInfo, transport) { + this.pageIndex = pageIndex; + this.pageInfo = pageInfo; + this.transport = transport; + this.stats = new StatTimer(); + this.stats.enabled = !!globalScope.PDFJS.enableStats; + this.commonObjs = transport.commonObjs; + this.objs = new PDFObjects(); + this.cleanupAfterRender = false; + this.pendingCleanup = false; + this.intentStates = {}; + this.destroyed = false; + } + PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ { + /** + * @return {number} Page number of the page. First page is 1. + */ + get pageNumber() { + return this.pageIndex + 1; + }, + /** + * @return {number} The number of degrees the page is rotated clockwise. + */ + get rotate() { + return this.pageInfo.rotate; + }, + /** + * @return {Object} The reference that points to this page. It has 'num' and + * 'gen' properties. + */ + get ref() { + return this.pageInfo.ref; + }, + /** + * @return {Array} An array of the visible portion of the PDF page in the + * user space units - [x1, y1, x2, y2]. + */ + get view() { + return this.pageInfo.view; + }, + /** + * @param {number} scale The desired scale of the viewport. + * @param {number} rotate Degrees to rotate the viewport. If omitted this + * defaults to the page rotation. + * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties + * along with transforms required for rendering. + */ + getViewport: function PDFPageProxy_getViewport(scale, rotate) { + if (arguments.length < 2) { + rotate = this.rotate; } + return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0); + }, + /** + * @param {GetAnnotationsParameters} params - Annotation parameters. + * @return {Promise} A promise that is resolved with an {Array} of the + * annotation objects. + */ + getAnnotations: function PDFPageProxy_getAnnotations(params) { + var intent = (params && params.intent) || null; - var total = 0; - function next(ref) { - return pagesBeforeRef(ref).then(function (args) { - if (!args) { - return total; - } - var count = args[0]; - var parentRef = args[1]; - total += count; - return next(parentRef); - }); + if (!this.annotationsPromise || this.annotationsIntent !== intent) { + this.annotationsPromise = this.transport.getAnnotations(this.pageIndex, + intent); + this.annotationsIntent = intent; } + return this.annotationsPromise; + }, + /** + * Begins the process of rendering a page to the desired context. + * @param {RenderParameters} params Page render parameters. + * @return {RenderTask} An object that contains the promise, which + * is resolved when the page finishes rendering. + */ + render: function PDFPageProxy_render(params) { + var stats = this.stats; + stats.time('Overall'); - return next(ref); - } - }; + // If there was a pending destroy cancel it so no cleanup happens during + // this call to render. + this.pendingCleanup = false; - return Catalog; -})(); + var renderingIntent = (params.intent === 'print' ? 'print' : 'display'); -var XRef = (function XRefClosure() { - function XRef(stream, password) { - this.stream = stream; - this.entries = []; - this.xrefstms = {}; - // prepare the XRef cache - this.cache = []; - this.password = password; - this.stats = { - streamTypes: [], - fontTypes: [] - }; - } + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; + } + var intentState = this.intentStates[renderingIntent]; - XRef.prototype = { - setStartXRef: function XRef_setStartXRef(startXRef) { - // Store the starting positions of xref tables as we process them - // so we can recover from missing data errors - this.startXRefQueue = [startXRef]; - }, + // If there's no displayReadyCapability yet, then the operatorList + // was never requested before. Make the request and create the promise. + if (!intentState.displayReadyCapability) { + intentState.receivingOperatorList = true; + intentState.displayReadyCapability = createPromiseCapability(); + intentState.operatorList = { + fnArray: [], + argsArray: [], + lastChunk: false + }; - parse: function XRef_parse(recoveryMode) { - var trailerDict; - if (!recoveryMode) { - trailerDict = this.readXRef(); - } else { - warn('Indexing all PDF objects'); - trailerDict = this.indexObjects(); - } - trailerDict.assignXref(this); - this.trailer = trailerDict; - var encrypt = trailerDict.get('Encrypt'); - if (encrypt) { - var ids = trailerDict.get('ID'); - var fileId = (ids && ids.length) ? ids[0] : ''; - this.encrypt = new CipherTransformFactory(encrypt, fileId, - this.password); + this.stats.time('Page Request'); + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageNumber - 1, + intent: renderingIntent + }); } - // get the root dictionary (catalog) object - if (!(this.root = trailerDict.get('Root'))) { - error('Invalid root reference'); + var internalRenderTask = new InternalRenderTask(complete, params, + this.objs, + this.commonObjs, + intentState.operatorList, + this.pageNumber); + internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print'; + if (!intentState.renderTasks) { + intentState.renderTasks = []; } - }, + intentState.renderTasks.push(internalRenderTask); + var renderTask = internalRenderTask.task; - processXRefTable: function XRef_processXRefTable(parser) { - if (!('tableState' in this)) { - // Stores state of the table as we process it so we can resume - // from middle of table in case of missing data error - this.tableState = { - entryNum: 0, - streamPos: parser.lexer.stream.pos, - parserBuf1: parser.buf1, - parserBuf2: parser.buf2 - }; + // Obsolete parameter support + if (params.continueCallback) { + deprecated('render is used with continueCallback parameter'); + renderTask.onContinue = params.continueCallback; } - var obj = this.readXRefTable(parser); + var self = this; + intentState.displayReadyCapability.promise.then( + function pageDisplayReadyPromise(transparency) { + if (self.pendingCleanup) { + complete(); + return; + } + stats.time('Rendering'); + internalRenderTask.initalizeGraphics(transparency); + internalRenderTask.operatorListChanged(); + }, + function pageDisplayReadPromiseError(reason) { + complete(reason); + } + ); - // Sanity check - if (!isCmd(obj, 'trailer')) { - error('Invalid XRef table: could not find trailer dictionary'); - } - // Read trailer dictionary, e.g. - // trailer - // << /Size 22 - // /Root 20R - // /Info 10R - // /ID [ <81b14aafa313db63dbd6f981e49f94f4> ] - // >> - // The parser goes through the entire stream << ... >> and provides - // a getter interface for the key-value table - var dict = parser.getObj(); + function complete(error) { + var i = intentState.renderTasks.indexOf(internalRenderTask); + if (i >= 0) { + intentState.renderTasks.splice(i, 1); + } - // The pdflib PDF generator can generate a nested trailer dictionary - if (!isDict(dict) && dict.dict) { - dict = dict.dict; - } - if (!isDict(dict)) { - error('Invalid XRef table: could not parse trailer dictionary'); + if (self.cleanupAfterRender) { + self.pendingCleanup = true; + } + self._tryCleanup(); + + if (error) { + internalRenderTask.capability.reject(error); + } else { + internalRenderTask.capability.resolve(); + } + stats.timeEnd('Rendering'); + stats.timeEnd('Overall'); } - delete this.tableState; - return dict; + return renderTask; }, - readXRefTable: function XRef_readXRefTable(parser) { - // Example of cross-reference table: - // xref - // 0 1 <-- subsection header (first obj #, obj count) - // 0000000000 65535 f <-- actual object (offset, generation #, f/n) - // 23 2 <-- subsection header ... and so on ... - // 0000025518 00002 n - // 0000025635 00000 n - // trailer - // ... - - var stream = parser.lexer.stream; - var tableState = this.tableState; - stream.pos = tableState.streamPos; - parser.buf1 = tableState.parserBuf1; - parser.buf2 = tableState.parserBuf2; + /** + * @return {Promise} A promise resolved with an {@link PDFOperatorList} + * object that represents page's operator list. + */ + getOperatorList: function PDFPageProxy_getOperatorList() { + function operatorListChanged() { + if (intentState.operatorList.lastChunk) { + intentState.opListReadCapability.resolve(intentState.operatorList); + } + } - // Outer loop is over subsection headers - var obj; + var renderingIntent = 'oplist'; + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; + } + var intentState = this.intentStates[renderingIntent]; - while (true) { - if (!('firstEntryNum' in tableState) || !('entryCount' in tableState)) { - if (isCmd(obj = parser.getObj(), 'trailer')) { - break; - } - tableState.firstEntryNum = obj; - tableState.entryCount = parser.getObj(); - } + if (!intentState.opListReadCapability) { + var opListTask = {}; + opListTask.operatorListChanged = operatorListChanged; + intentState.receivingOperatorList = true; + intentState.opListReadCapability = createPromiseCapability(); + intentState.renderTasks = []; + intentState.renderTasks.push(opListTask); + intentState.operatorList = { + fnArray: [], + argsArray: [], + lastChunk: false + }; - var first = tableState.firstEntryNum; - var count = tableState.entryCount; - if (!isInt(first) || !isInt(count)) { - error('Invalid XRef table: wrong types in subsection header'); - } - // Inner loop is over objects themselves - for (var i = tableState.entryNum; i < count; i++) { - tableState.streamPos = stream.pos; - tableState.entryNum = i; - tableState.parserBuf1 = parser.buf1; - tableState.parserBuf2 = parser.buf2; + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageIndex, + intent: renderingIntent + }); + } + return intentState.opListReadCapability.promise; + }, - var entry = {}; - entry.offset = parser.getObj(); - entry.gen = parser.getObj(); - var type = parser.getObj(); + /** + * @param {getTextContentParameters} params - getTextContent parameters. + * @return {Promise} That is resolved a {@link TextContent} + * object that represent the page text content. + */ + getTextContent: function PDFPageProxy_getTextContent(params) { + var normalizeWhitespace = (params && params.normalizeWhitespace) || false; - if (isCmd(type, 'f')) { - entry.free = true; - } else if (isCmd(type, 'n')) { - entry.uncompressed = true; - } + return this.transport.messageHandler.sendWithPromise('GetTextContent', { + pageIndex: this.pageNumber - 1, + normalizeWhitespace: normalizeWhitespace, + }); + }, - // Validate entry obj - if (!isInt(entry.offset) || !isInt(entry.gen) || - !(entry.free || entry.uncompressed)) { - error('Invalid entry in XRef subsection: ' + first + ', ' + count); - } + /** + * Destroys page object. + */ + _destroy: function PDFPageProxy_destroy() { + this.destroyed = true; + this.transport.pageCache[this.pageIndex] = null; - if (!this.entries[i + first]) { - this.entries[i + first] = entry; - } - } + var waitOn = []; + Object.keys(this.intentStates).forEach(function(intent) { + var intentState = this.intentStates[intent]; + intentState.renderTasks.forEach(function(renderTask) { + var renderCompleted = renderTask.capability.promise. + catch(function () {}); // ignoring failures + waitOn.push(renderCompleted); + renderTask.cancel(); + }); + }, this); + this.objs.clear(); + this.annotationsPromise = null; + this.pendingCleanup = false; + return Promise.all(waitOn); + }, - tableState.entryNum = 0; - tableState.streamPos = stream.pos; - tableState.parserBuf1 = parser.buf1; - tableState.parserBuf2 = parser.buf2; - delete tableState.firstEntryNum; - delete tableState.entryCount; - } + /** + * Cleans up resources allocated by the page. (deprecated) + */ + destroy: function() { + deprecated('page destroy method, use cleanup() instead'); + this.cleanup(); + }, - // Per issue 3248: hp scanners generate bad XRef - if (first === 1 && this.entries[1] && this.entries[1].free) { - // shifting the entries - this.entries.shift(); + /** + * Cleans up resources allocated by the page. + */ + cleanup: function PDFPageProxy_cleanup() { + this.pendingCleanup = true; + this._tryCleanup(); + }, + /** + * For internal use only. Attempts to clean up if rendering is in a state + * where that's possible. + * @ignore + */ + _tryCleanup: function PDFPageProxy_tryCleanup() { + if (!this.pendingCleanup || + Object.keys(this.intentStates).some(function(intent) { + var intentState = this.intentStates[intent]; + return (intentState.renderTasks.length !== 0 || + intentState.receivingOperatorList); + }, this)) { + return; } - // Sanity check: as per spec, first object must be free - if (this.entries[0] && !this.entries[0].free) { - error('Invalid XRef table: unexpected first object'); + Object.keys(this.intentStates).forEach(function(intent) { + delete this.intentStates[intent]; + }, this); + this.objs.clear(); + this.annotationsPromise = null; + this.pendingCleanup = false; + }, + /** + * For internal use only. + * @ignore + */ + _startRenderPage: function PDFPageProxy_startRenderPage(transparency, + intent) { + var intentState = this.intentStates[intent]; + // TODO Refactor RenderPageRequest to separate rendering + // and operator list logic + if (intentState.displayReadyCapability) { + intentState.displayReadyCapability.resolve(transparency); } - return obj; }, + /** + * For internal use only. + * @ignore + */ + _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, + intent) { + var intentState = this.intentStates[intent]; + var i, ii; + // Add the new chunk to the current operator list. + for (i = 0, ii = operatorListChunk.length; i < ii; i++) { + intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]); + intentState.operatorList.argsArray.push( + operatorListChunk.argsArray[i]); + } + intentState.operatorList.lastChunk = operatorListChunk.lastChunk; - processXRefStream: function XRef_processXRefStream(stream) { - if (!('streamState' in this)) { - // Stores state of the stream as we process it so we can resume - // from middle of stream in case of missing data error - var streamParameters = stream.dict; - var byteWidths = streamParameters.get('W'); - var range = streamParameters.get('Index'); - if (!range) { - range = [0, streamParameters.get('Size')]; - } + // Notify all the rendering tasks there are more operators to be consumed. + for (i = 0; i < intentState.renderTasks.length; i++) { + intentState.renderTasks[i].operatorListChanged(); + } - this.streamState = { - entryRanges: range, - byteWidths: byteWidths, - entryNum: 0, - streamPos: stream.pos - }; + if (operatorListChunk.lastChunk) { + intentState.receivingOperatorList = false; + this._tryCleanup(); } - this.readXRefStream(stream); - delete this.streamState; + } + }; + return PDFPageProxy; +})(); - return stream.dict; - }, +/** + * PDF.js web worker abstraction, it controls instantiation of PDF documents and + * WorkerTransport for them. If creation of a web worker is not possible, + * a "fake" worker will be used instead. + * @class + */ +var PDFWorker = (function PDFWorkerClosure() { + var nextFakeWorkerId = 0; - readXRefStream: function XRef_readXRefStream(stream) { - var i, j; - var streamState = this.streamState; - stream.pos = streamState.streamPos; + // Loads worker code into main thread. + function setupFakeWorkerGlobal() { + if (!PDFJS.fakeWorkerFilesLoadedCapability) { + PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability(); + // In the developer build load worker_loader which in turn loads all the + // other files and resolves the promise. In production only the + // pdf.worker.js file is needed. + PDFJS.fakeWorkerFilesLoadedCapability.resolve(); + } + return PDFJS.fakeWorkerFilesLoadedCapability.promise; + } - var byteWidths = streamState.byteWidths; - var typeFieldWidth = byteWidths[0]; - var offsetFieldWidth = byteWidths[1]; - var generationFieldWidth = byteWidths[2]; + function PDFWorker(name) { + this.name = name; + this.destroyed = false; - var entryRanges = streamState.entryRanges; - while (entryRanges.length > 0) { - var first = entryRanges[0]; - var n = entryRanges[1]; + this._readyCapability = createPromiseCapability(); + this._port = null; + this._webWorker = null; + this._messageHandler = null; + this._initialize(); + } - if (!isInt(first) || !isInt(n)) { - error('Invalid XRef range fields: ' + first + ', ' + n); - } - if (!isInt(typeFieldWidth) || !isInt(offsetFieldWidth) || - !isInt(generationFieldWidth)) { - error('Invalid XRef entry fields length: ' + first + ', ' + n); - } - for (i = streamState.entryNum; i < n; ++i) { - streamState.entryNum = i; - streamState.streamPos = stream.pos; + PDFWorker.prototype = /** @lends PDFWorker.prototype */ { + get promise() { + return this._readyCapability.promise; + }, - var type = 0, offset = 0, generation = 0; - for (j = 0; j < typeFieldWidth; ++j) { - type = (type << 8) | stream.getByte(); - } - // if type field is absent, its default value is 1 - if (typeFieldWidth === 0) { - type = 1; - } - for (j = 0; j < offsetFieldWidth; ++j) { - offset = (offset << 8) | stream.getByte(); - } - for (j = 0; j < generationFieldWidth; ++j) { - generation = (generation << 8) | stream.getByte(); - } - var entry = {}; - entry.offset = offset; - entry.gen = generation; - switch (type) { - case 0: - entry.free = true; - break; - case 1: - entry.uncompressed = true; - break; - case 2: - break; - default: - error('Invalid XRef entry type: ' + type); - } - if (!this.entries[first + i]) { - this.entries[first + i] = entry; - } - } + get port() { + return this._port; + }, + + get messageHandler() { + return this._messageHandler; + }, - streamState.entryNum = 0; - streamState.streamPos = stream.pos; - entryRanges.splice(0, 2); - } + _initialize: function PDFWorker_initialize() { + // If worker support isn't disabled explicit and the browser has worker + // support, create a new web worker and test if it/the browser fullfills + // all requirements to run parts of pdf.js in a web worker. + // Right now, the requirement is, that an Uint8Array is still an + // Uint8Array as it arrives on the worker. (Chrome added this with v.15.) + // Either workers are disabled, not supported or have thrown an exception. + // Thus, we fallback to a faked worker. + this._setupFakeWorker(); }, - indexObjects: function XRef_indexObjects() { - // Simple scan through the PDF content to find objects, - // trailers and XRef streams. - var TAB = 0x9, LF = 0xA, CR = 0xD, SPACE = 0x20; - var PERCENT = 0x25, LT = 0x3C; + _setupFakeWorker: function PDFWorker_setupFakeWorker() { + if (!globalScope.PDFJS.disableWorker) { + warn('Setting up fake worker.'); + globalScope.PDFJS.disableWorker = true; + } - function readToken(data, offset) { - var token = '', ch = data[offset]; - while (ch !== LF && ch !== CR && ch !== LT) { - if (++offset >= data.length) { - break; - } - token += String.fromCharCode(ch); - ch = data[offset]; + setupFakeWorkerGlobal().then(function () { + if (this.destroyed) { + this._readyCapability.reject(new Error('Worker was destroyed')); + return; } - return token; + + // If we don't use a worker, just post/sendMessage to the main thread. + var port = { + _listeners: [], + postMessage: function (obj) { + var e = {data: obj}; + this._listeners.forEach(function (listener) { + listener.call(this, e); + }, this); + }, + addEventListener: function (name, listener) { + this._listeners.push(listener); + }, + removeEventListener: function (name, listener) { + var i = this._listeners.indexOf(listener); + this._listeners.splice(i, 1); + }, + terminate: function () {} + }; + this._port = port; + + // All fake workers use the same port, making id unique. + var id = 'fake' + (nextFakeWorkerId++); + + // If the main thread is our worker, setup the handling for the + // messages -- the main thread sends to it self. + var workerHandler = new MessageHandler(id + '_worker', id, port); + PDFJS.WorkerMessageHandler.setup(workerHandler, port); + + var messageHandler = new MessageHandler(id, id + '_worker', port); + this._messageHandler = messageHandler; + this._readyCapability.resolve(); + }.bind(this)); + }, + + /** + * Destroys the worker instance. + */ + destroy: function PDFWorker_destroy() { + this.destroyed = true; + if (this._webWorker) { + // We need to terminate only web worker created resource. + this._webWorker.terminate(); + this._webWorker = null; } - function skipUntil(data, offset, what) { - var length = what.length, dataLength = data.length; - var skipped = 0; - // finding byte sequence - while (offset < dataLength) { - var i = 0; - while (i < length && data[offset + i] === what[i]) { - ++i; - } - if (i >= length) { - break; // sequence found - } - offset++; - skipped++; - } - return skipped; + this._port = null; + if (this._messageHandler) { + this._messageHandler.destroy(); + this._messageHandler = null; } - var objRegExp = /^(\d+)\s+(\d+)\s+obj\b/; - var trailerBytes = new Uint8Array([116, 114, 97, 105, 108, 101, 114]); - var startxrefBytes = new Uint8Array([115, 116, 97, 114, 116, 120, 114, - 101, 102]); - var endobjBytes = new Uint8Array([101, 110, 100, 111, 98, 106]); - var xrefBytes = new Uint8Array([47, 88, 82, 101, 102]); + } + }; - // Clear out any existing entries, since they may be bogus. - this.entries.length = 0; + return PDFWorker; +})(); +PDFJS.PDFWorker = PDFWorker; - var stream = this.stream; - stream.pos = 0; - var buffer = stream.getBytes(); - var position = stream.start, length = buffer.length; - var trailers = [], xrefStms = []; - while (position < length) { - var ch = buffer[position]; - if (ch === TAB || ch === LF || ch === CR || ch === SPACE) { - ++position; - continue; - } - if (ch === PERCENT) { // %-comment - do { - ++position; - if (position >= length) { - break; - } - ch = buffer[position]; - } while (ch !== LF && ch !== CR); - continue; - } - var token = readToken(buffer, position); - var m; - if (token.indexOf('xref') === 0 && - (token.length === 4 || /\s/.test(token[4]))) { - position += skipUntil(buffer, position, trailerBytes); - trailers.push(position); - position += skipUntil(buffer, position, startxrefBytes); - } else if ((m = objRegExp.exec(token))) { - if (typeof this.entries[m[1]] === 'undefined') { - this.entries[m[1]] = { - offset: position - stream.start, - gen: m[2] | 0, - uncompressed: true - }; - } - var contentLength = skipUntil(buffer, position, endobjBytes) + 7; - var content = buffer.subarray(position, position + contentLength); +/** + * For internal use only. + * @ignore + */ +var WorkerTransport = (function WorkerTransportClosure() { + function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) { + this.messageHandler = messageHandler; + this.loadingTask = loadingTask; + this.pdfDataRangeTransport = pdfDataRangeTransport; + this.commonObjs = new PDFObjects(); + this.fontLoader = new FontLoader(loadingTask.docId); - // checking XRef stream suspect - // (it shall have '/XRef' and next char is not a letter) - var xrefTagOffset = skipUntil(content, 0, xrefBytes); - if (xrefTagOffset < contentLength && - content[xrefTagOffset + 5] < 64) { - xrefStms.push(position - stream.start); - this.xrefstms[position - stream.start] = 1; // Avoid recursion - } + this.destroyed = false; + this.destroyCapability = null; - position += contentLength; - } else if (token.indexOf('trailer') === 0 && - (token.length === 7 || /\s/.test(token[7]))) { - trailers.push(position); - position += skipUntil(buffer, position, startxrefBytes); - } else { - position += token.length + 1; - } - } - // reading XRef streams - var i, ii; - for (i = 0, ii = xrefStms.length; i < ii; ++i) { - this.startXRefQueue.push(xrefStms[i]); - this.readXRef(/* recoveryMode */ true); + this.pageCache = []; + this.pagePromises = []; + this.downloadInfoCapability = createPromiseCapability(); + + this.setupMessageHandler(); + } + WorkerTransport.prototype = { + destroy: function WorkerTransport_destroy() { + if (this.destroyCapability) { + return this.destroyCapability.promise; } - // finding main trailer - var dict; - for (i = 0, ii = trailers.length; i < ii; ++i) { - stream.pos = trailers[i]; - var parser = new Parser(new Lexer(stream), true, this); - var obj = parser.getObj(); - if (!isCmd(obj, 'trailer')) { - continue; + + this.destroyed = true; + this.destroyCapability = createPromiseCapability(); + + var waitOn = []; + // We need to wait for all renderings to be completed, e.g. + // timeout/rAF can take a long time. + this.pageCache.forEach(function (page) { + if (page) { + waitOn.push(page._destroy()); } - // read the trailer dictionary - if (!isDict(dict = parser.getObj())) { - continue; + }); + this.pageCache = []; + this.pagePromises = []; + var self = this; + // We also need to wait for the worker to finish its long running tasks. + var terminated = this.messageHandler.sendWithPromise('Terminate', null); + waitOn.push(terminated); + Promise.all(waitOn).then(function () { + self.fontLoader.clear(); + if (self.pdfDataRangeTransport) { + self.pdfDataRangeTransport.abort(); + self.pdfDataRangeTransport = null; } - // taking the first one with 'ID' - if (dict.has('ID')) { - return dict; + if (self.messageHandler) { + self.messageHandler.destroy(); + self.messageHandler = null; } - } - // no tailer with 'ID', taking last one (if exists) - if (dict) { - return dict; - } - // nothing helps - // calling error() would reject worker with an UnknownErrorException. - throw new InvalidPDFException('Invalid PDF structure'); + self.destroyCapability.resolve(); + }, this.destroyCapability.reject); + return this.destroyCapability.promise; }, - readXRef: function XRef_readXRef(recoveryMode) { - var stream = this.stream; + setupMessageHandler: + function WorkerTransport_setupMessageHandler() { + var messageHandler = this.messageHandler; - try { - while (this.startXRefQueue.length) { - var startXRef = this.startXRefQueue[0]; + function updatePassword(password) { + messageHandler.send('UpdatePassword', password); + } - stream.pos = startXRef + stream.start; + var pdfDataRangeTransport = this.pdfDataRangeTransport; + if (pdfDataRangeTransport) { + pdfDataRangeTransport.addRangeListener(function(begin, chunk) { + messageHandler.send('OnDataRange', { + begin: begin, + chunk: chunk + }); + }); - var parser = new Parser(new Lexer(stream), true, this); - var obj = parser.getObj(); - var dict; + pdfDataRangeTransport.addProgressListener(function(loaded) { + messageHandler.send('OnDataProgress', { + loaded: loaded + }); + }); - // Get dictionary - if (isCmd(obj, 'xref')) { - // Parse end-of-file XRef - dict = this.processXRefTable(parser); - if (!this.topDict) { - this.topDict = dict; - } + pdfDataRangeTransport.addProgressiveReadListener(function(chunk) { + messageHandler.send('OnDataRange', { + chunk: chunk + }); + }); - // Recursively get other XRefs 'XRefStm', if any - obj = dict.get('XRefStm'); - if (isInt(obj)) { - var pos = obj; - // ignore previously loaded xref streams - // (possible infinite recursion) - if (!(pos in this.xrefstms)) { - this.xrefstms[pos] = 1; - this.startXRefQueue.push(pos); - } - } - } else if (isInt(obj)) { - // Parse in-stream XRef - if (!isInt(parser.getObj()) || - !isCmd(parser.getObj(), 'obj') || - !isStream(obj = parser.getObj())) { - error('Invalid XRef stream'); - } - dict = this.processXRefStream(obj); - if (!this.topDict) { - this.topDict = dict; - } - if (!dict) { - error('Failed to read XRef stream'); - } - } else { - error('Invalid XRef stream header'); - } + messageHandler.on('RequestDataRange', + function transportDataRange(data) { + pdfDataRangeTransport.requestDataRange(data.begin, data.end); + }, this); + } - // Recursively get previous dictionary, if any - obj = dict.get('Prev'); - if (isInt(obj)) { - this.startXRefQueue.push(obj); - } else if (isRef(obj)) { - // The spec says Prev must not be a reference, i.e. "/Prev NNN" - // This is a fallback for non-compliant PDFs, i.e. "/Prev NNN 0 R" - this.startXRefQueue.push(obj.num); - } + messageHandler.on('GetDoc', function transportDoc(data) { + var pdfInfo = data.pdfInfo; + this.numPages = data.pdfInfo.numPages; + var loadingTask = this.loadingTask; + var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask); + this.pdfDocument = pdfDocument; + loadingTask._capability.resolve(pdfDocument); + }, this); - this.startXRefQueue.shift(); + messageHandler.on('NeedPassword', + function transportNeedPassword(exception) { + var loadingTask = this.loadingTask; + if (loadingTask.onPassword) { + return loadingTask.onPassword(updatePassword, + PasswordResponses.NEED_PASSWORD); } + loadingTask._capability.reject( + new PasswordException(exception.message, exception.code)); + }, this); - return this.topDict; - } catch (e) { - if (e instanceof MissingDataException) { - throw e; + messageHandler.on('IncorrectPassword', + function transportIncorrectPassword(exception) { + var loadingTask = this.loadingTask; + if (loadingTask.onPassword) { + return loadingTask.onPassword(updatePassword, + PasswordResponses.INCORRECT_PASSWORD); } - info('(while reading XRef): ' + e); - } - - if (recoveryMode) { - return; - } - throw new XRefParseException(); - }, - - getEntry: function XRef_getEntry(i) { - var xrefEntry = this.entries[i]; - if (xrefEntry && !xrefEntry.free && xrefEntry.offset) { - return xrefEntry; - } - return null; - }, + loadingTask._capability.reject( + new PasswordException(exception.message, exception.code)); + }, this); - fetchIfRef: function XRef_fetchIfRef(obj) { - if (!isRef(obj)) { - return obj; - } - return this.fetch(obj); - }, + messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) { + this.loadingTask._capability.reject( + new InvalidPDFException(exception.message)); + }, this); - fetch: function XRef_fetch(ref, suppressEncryption) { - assert(isRef(ref), 'ref object is not a reference'); - var num = ref.num; - if (num in this.cache) { - var cacheEntry = this.cache[num]; - return cacheEntry; - } + messageHandler.on('MissingPDF', function transportMissingPDF(exception) { + this.loadingTask._capability.reject( + new MissingPDFException(exception.message)); + }, this); - var xrefEntry = this.getEntry(num); + messageHandler.on('UnexpectedResponse', + function transportUnexpectedResponse(exception) { + this.loadingTask._capability.reject( + new UnexpectedResponseException(exception.message, exception.status)); + }, this); - // the referenced entry can be free - if (xrefEntry === null) { - return (this.cache[num] = null); - } + messageHandler.on('UnknownError', + function transportUnknownError(exception) { + this.loadingTask._capability.reject( + new UnknownErrorException(exception.message, exception.details)); + }, this); - if (xrefEntry.uncompressed) { - xrefEntry = this.fetchUncompressed(ref, xrefEntry, suppressEncryption); - } else { - xrefEntry = this.fetchCompressed(xrefEntry, suppressEncryption); - } - if (isDict(xrefEntry)){ - xrefEntry.objId = ref.toString(); - } else if (isStream(xrefEntry)) { - xrefEntry.dict.objId = ref.toString(); - } - return xrefEntry; - }, + messageHandler.on('DataLoaded', function transportPage(data) { + this.downloadInfoCapability.resolve(data); + }, this); - fetchUncompressed: function XRef_fetchUncompressed(ref, xrefEntry, - suppressEncryption) { - var gen = ref.gen; - var num = ref.num; - if (xrefEntry.gen !== gen) { - error('inconsistent generation in XRef'); - } - var stream = this.stream.makeSubStream(xrefEntry.offset + - this.stream.start); - var parser = new Parser(new Lexer(stream), true, this); - var obj1 = parser.getObj(); - var obj2 = parser.getObj(); - var obj3 = parser.getObj(); - if (!isInt(obj1) || parseInt(obj1, 10) !== num || - !isInt(obj2) || parseInt(obj2, 10) !== gen || - !isCmd(obj3)) { - error('bad XRef entry'); - } - if (!isCmd(obj3, 'obj')) { - // some bad PDFs use "obj1234" and really mean 1234 - if (obj3.cmd.indexOf('obj') === 0) { - num = parseInt(obj3.cmd.substring(3), 10); - if (!isNaN(num)) { - return num; - } + messageHandler.on('PDFManagerReady', function transportPage(data) { + if (this.pdfDataRangeTransport) { + this.pdfDataRangeTransport.transportReady(); } - error('bad XRef entry'); - } - if (this.encrypt && !suppressEncryption) { - xrefEntry = parser.getObj(this.encrypt.createCipherTransform(num, gen)); - } else { - xrefEntry = parser.getObj(); - } - if (!isStream(xrefEntry)) { - this.cache[num] = xrefEntry; - } - return xrefEntry; - }, + }, this); - fetchCompressed: function XRef_fetchCompressed(xrefEntry, - suppressEncryption) { - var tableOffset = xrefEntry.offset; - var stream = this.fetch(new Ref(tableOffset, 0)); - if (!isStream(stream)) { - error('bad ObjStm stream'); - } - var first = stream.dict.get('First'); - var n = stream.dict.get('N'); - if (!isInt(first) || !isInt(n)) { - error('invalid first and n parameters for ObjStm stream'); - } - var parser = new Parser(new Lexer(stream), false, this); - parser.allowStreams = true; - var i, entries = [], num, nums = []; - // read the object numbers to populate cache - for (i = 0; i < n; ++i) { - num = parser.getObj(); - if (!isInt(num)) { - error('invalid object number in the ObjStm stream: ' + num); - } - nums.push(num); - var offset = parser.getObj(); - if (!isInt(offset)) { - error('invalid object offset in the ObjStm stream: ' + offset); + messageHandler.on('StartRenderPage', function transportRender(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - } - // read stream objects for cache - for (i = 0; i < n; ++i) { - entries.push(parser.getObj()); - num = nums[i]; - var entry = this.entries[num]; - if (entry && entry.offset === tableOffset && entry.gen === i) { - this.cache[num] = entries[i]; + var page = this.pageCache[data.pageIndex]; + + page.stats.timeEnd('Page Request'); + page._startRenderPage(data.transparency, data.intent); + }, this); + + messageHandler.on('RenderPageChunk', function transportRender(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - } - xrefEntry = entries[xrefEntry.gen]; - if (xrefEntry === undefined) { - error('bad XRef entry for compressed object'); - } - return xrefEntry; - }, + var page = this.pageCache[data.pageIndex]; - fetchIfRefAsync: function XRef_fetchIfRefAsync(obj) { - if (!isRef(obj)) { - return Promise.resolve(obj); - } - return this.fetchAsync(obj); - }, + page._renderPageChunk(data.operatorList, data.intent); + }, this); - fetchAsync: function XRef_fetchAsync(ref, suppressEncryption) { - var streamManager = this.stream.manager; - var xref = this; - return new Promise(function tryFetch(resolve, reject) { - try { - resolve(xref.fetch(ref, suppressEncryption)); - } catch (e) { - if (e instanceof MissingDataException) { - streamManager.requestRange(e.begin, e.end).then(function () { - tryFetch(resolve, reject); - }, reject); - return; - } - reject(e); + messageHandler.on('commonobj', function transportObj(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - }); - }, - getCatalogObj: function XRef_getCatalogObj() { - return this.root; - } - }; + var id = data[0]; + var type = data[1]; + if (this.commonObjs.hasData(id)) { + return; + } - return XRef; -})(); + switch (type) { + case 'Font': + var exportedData = data[2]; -/** - * A NameTree is like a Dict but has some advantageous properties, see the - * spec (7.9.6) for more details. - * TODO: implement all the Dict functions and make this more efficent. - */ -var NameTree = (function NameTreeClosure() { - function NameTree(root, xref) { - this.root = root; - this.xref = xref; - } + var font; + if ('error' in exportedData) { + var error = exportedData.error; + warn('Error during font loading: ' + error); + this.commonObjs.resolve(id, error); + break; + } else { + font = new FontFaceObject(exportedData); + } - NameTree.prototype = { - getAll: function NameTree_getAll() { - var dict = {}; - if (!this.root) { - return dict; - } - var xref = this.xref; - // reading name tree - var processed = new RefSet(); - processed.put(this.root); - var queue = [this.root]; - while (queue.length > 0) { - var i, n; - var obj = xref.fetchIfRef(queue.shift()); - if (!isDict(obj)) { - continue; + this.fontLoader.bind( + [font], + function fontReady(fontObjs) { + this.commonObjs.resolve(id, font); + }.bind(this) + ); + break; + case 'FontPath': + this.commonObjs.resolve(id, data[2]); + break; + default: + error('Got unknown common object type ' + type); } - if (obj.has('Kids')) { - var kids = obj.get('Kids'); - for (i = 0, n = kids.length; i < n; i++) { - var kid = kids[i]; - if (processed.has(kid)) { - error('invalid destinations'); - } - queue.push(kid); - processed.put(kid); - } - continue; + }, this); + + messageHandler.on('obj', function transportObj(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - var names = obj.get('Names'); - if (names) { - for (i = 0, n = names.length; i < n; i += 2) { - dict[xref.fetchIfRef(names[i])] = xref.fetchIfRef(names[i + 1]); - } + + var id = data[0]; + var pageIndex = data[1]; + var type = data[2]; + var pageProxy = this.pageCache[pageIndex]; + var imageData; + if (pageProxy.objs.hasData(id)) { + return; } - } - return dict; - }, - get: function NameTree_get(destinationId) { - if (!this.root) { - return null; - } + switch (type) { + case 'JpegStream': + imageData = data[3]; + loadJpegStream(id, imageData, pageProxy.objs); + break; + case 'Image': + imageData = data[3]; + pageProxy.objs.resolve(id, imageData); - var xref = this.xref; - var kidsOrNames = xref.fetchIfRef(this.root); - var loopCount = 0; - var MAX_NAMES_LEVELS = 10; - var l, r, m; + // heuristics that will allow not to store large data + var MAX_IMAGE_SIZE_TO_STORE = 8000000; + if (imageData && 'data' in imageData && + imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) { + pageProxy.cleanupAfterRender = true; + } + break; + default: + error('Got unknown object type ' + type); + } + }, this); - // Perform a binary search to quickly find the entry that - // contains the named destination we are looking for. - while (kidsOrNames.has('Kids')) { - loopCount++; - if (loopCount > MAX_NAMES_LEVELS) { - warn('Search depth limit for named destionations has been reached.'); - return null; + messageHandler.on('DocProgress', function transportDocProgress(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - var kids = kidsOrNames.get('Kids'); - if (!isArray(kids)) { - return null; + var loadingTask = this.loadingTask; + if (loadingTask.onProgress) { + loadingTask.onProgress({ + loaded: data.loaded, + total: data.total + }); } + }, this); - l = 0; - r = kids.length - 1; - while (l <= r) { - m = (l + r) >> 1; - var kid = xref.fetchIfRef(kids[m]); - var limits = kid.get('Limits'); + messageHandler.on('PageError', function transportError(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } - if (destinationId < xref.fetchIfRef(limits[0])) { - r = m - 1; - } else if (destinationId > xref.fetchIfRef(limits[1])) { - l = m + 1; - } else { - kidsOrNames = xref.fetchIfRef(kids[m]); - break; - } + var page = this.pageCache[data.pageNum - 1]; + var intentState = page.intentStates[data.intent]; + if (intentState.displayReadyCapability) { + intentState.displayReadyCapability.reject(data.error); + } else { + error(data.error); } - if (l > r) { - return null; + }, this); + + messageHandler.on('UnsupportedFeature', + function transportUnsupportedFeature(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - } + var featureId = data.featureId; + var loadingTask = this.loadingTask; + if (loadingTask.onUnsupportedFeature) { + loadingTask.onUnsupportedFeature(featureId); + } + PDFJS.UnsupportedManager.notify(featureId); + }, this); - // If we get here, then we have found the right entry. Now - // go through the named destinations in the Named dictionary - // until we find the exact destination we're looking for. - var names = kidsOrNames.get('Names'); - if (isArray(names)) { - // Perform a binary search to reduce the lookup time. - l = 0; - r = names.length - 2; - while (l <= r) { - // Check only even indices (0, 2, 4, ...) because the - // odd indices contain the actual D array. - m = (l + r) & ~1; - if (destinationId < xref.fetchIfRef(names[m])) { - r = m - 2; - } else if (destinationId > xref.fetchIfRef(names[m])) { - l = m + 2; - } else { - return xref.fetchIfRef(names[m + 1]); - } + messageHandler.on('JpegDecode', function(data) { + if (this.destroyed) { + return Promise.reject('Worker was terminated'); } - } - return null; - } - }; - return NameTree; -})(); -/** - * "A PDF file can refer to the contents of another file by using a File - * Specification (PDF 1.1)", see the spec (7.11) for more details. - * NOTE: Only embedded files are supported (as part of the attachments support) - * TODO: support the 'URL' file system (with caching if !/V), portable - * collections attributes and related files (/RF) - */ -var FileSpec = (function FileSpecClosure() { - function FileSpec(root, xref) { - if (!root || !isDict(root)) { - return; - } - this.xref = xref; - this.root = root; - if (root.has('FS')) { - this.fs = root.get('FS'); - } - this.description = root.has('Desc') ? - stringToPDFString(root.get('Desc')) : - ''; - if (root.has('RF')) { - warn('Related file specifications are not supported'); - } - this.contentAvailable = true; - if (!root.has('EF')) { - this.contentAvailable = false; - warn('Non-embedded file specifications are not supported'); - } - } + var imageUrl = data[0]; + var components = data[1]; + if (components !== 3 && components !== 1) { + return Promise.reject( + new Error('Only 3 components or 1 component can be returned')); + } - function pickPlatformItem(dict) { - // Look for the filename in this order: - // UF, F, Unix, Mac, DOS - if (dict.has('UF')) { - return dict.get('UF'); - } else if (dict.has('F')) { - return dict.get('F'); - } else if (dict.has('Unix')) { - return dict.get('Unix'); - } else if (dict.has('Mac')) { - return dict.get('Mac'); - } else if (dict.has('DOS')) { - return dict.get('DOS'); - } else { - return null; - } - } + return new Promise(function (resolve, reject) { + var img = new Image(); + img.onload = function () { + var width = img.width; + var height = img.height; + var size = width * height; + var rgbaLength = size * 4; + var buf = new Uint8Array(size * components); + var tmpCanvas = createScratchCanvas(width, height); + var tmpCtx = tmpCanvas.getContext('2d'); + tmpCtx.drawImage(img, 0, 0); + var data = tmpCtx.getImageData(0, 0, width, height).data; + var i, j; - FileSpec.prototype = { - get filename() { - if (!this._filename && this.root) { - var filename = pickPlatformItem(this.root) || 'unnamed'; - this._filename = stringToPDFString(filename). - replace(/\\\\/g, '\\'). - replace(/\\\//g, '/'). - replace(/\\/g, '/'); - } - return this._filename; - }, - get content() { - if (!this.contentAvailable) { - return null; - } - if (!this.contentRef && this.root) { - this.contentRef = pickPlatformItem(this.root.get('EF')); - } - var content = null; - if (this.contentRef) { - var xref = this.xref; - var fileObj = xref.fetchIfRef(this.contentRef); - if (fileObj && isStream(fileObj)) { - content = fileObj.getBytes(); - } else { - warn('Embedded file specification points to non-existing/invalid ' + - 'content'); - } - } else { - warn('Embedded file specification does not have a content'); - } - return content; + if (components === 3) { + for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) { + buf[j] = data[i]; + buf[j + 1] = data[i + 1]; + buf[j + 2] = data[i + 2]; + } + } else if (components === 1) { + for (i = 0, j = 0; i < rgbaLength; i += 4, j++) { + buf[j] = data[i]; + } + } + resolve({ data: buf, width: width, height: height}); + }; + img.onerror = function () { + reject(new Error('JpegDecode failed to load image')); + }; + img.src = imageUrl; + }); + }, this); }, - get serializable() { - return { - filename: this.filename, - content: this.content - }; - } - }; - return FileSpec; -})(); -/** - * A helper for loading missing data in object graphs. It traverses the graph - * depth first and queues up any objects that have missing data. Once it has - * has traversed as many objects that are available it attempts to bundle the - * missing data requests and then resume from the nodes that weren't ready. - * - * NOTE: It provides protection from circular references by keeping track of - * of loaded references. However, you must be careful not to load any graphs - * that have references to the catalog or other pages since that will cause the - * entire PDF document object graph to be traversed. - */ -var ObjectLoader = (function() { - function mayHaveChildren(value) { - return isRef(value) || isDict(value) || isArray(value) || isStream(value); - } + getData: function WorkerTransport_getData() { + return this.messageHandler.sendWithPromise('GetData', null); + }, - function addChildren(node, nodesToVisit) { - var value; - if (isDict(node) || isStream(node)) { - var map; - if (isDict(node)) { - map = node.map; - } else { - map = node.dict.map; + getPage: function WorkerTransport_getPage(pageNumber, capability) { + if (pageNumber <= 0 || pageNumber > this.numPages || + (pageNumber|0) !== pageNumber) { + return Promise.reject(new Error('Invalid page request')); } - for (var key in map) { - value = map[key]; - if (mayHaveChildren(value)) { - nodesToVisit.push(value); - } + + var pageIndex = pageNumber - 1; + if (pageIndex in this.pagePromises) { + return this.pagePromises[pageIndex]; } - } else if (isArray(node)) { - for (var i = 0, ii = node.length; i < ii; i++) { - value = node[i]; - if (mayHaveChildren(value)) { - nodesToVisit.push(value); + var promise = this.messageHandler.sendWithPromise('GetPage', { + pageIndex: pageIndex + }).then(function (pageInfo) { + if (this.destroyed) { + throw new Error('Transport destroyed'); } - } - } - } + var page = new PDFPageProxy(pageIndex, pageInfo, this); + this.pageCache[pageIndex] = page; + return page; + }.bind(this)); + this.pagePromises[pageIndex] = promise; + return promise; + }, - function ObjectLoader(obj, keys, xref) { - this.obj = obj; - this.keys = keys; - this.xref = xref; - this.refSet = null; - this.capability = null; - } + getPageIndex: function WorkerTransport_getPageIndexByRef(ref) { + return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }); + }, - ObjectLoader.prototype = { - load: function ObjectLoader_load() { - var keys = this.keys; - this.capability = createPromiseCapability(); - // Don't walk the graph if all the data is already loaded. - if (!(this.xref.stream instanceof ChunkedStream) || - this.xref.stream.getMissingChunks().length === 0) { - this.capability.resolve(); - return this.capability.promise; - } + getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) { + return this.messageHandler.sendWithPromise('GetAnnotations', { + pageIndex: pageIndex, + intent: intent, + }); + }, - this.refSet = new RefSet(); - // Setup the initial nodes to visit. - var nodesToVisit = []; - for (var i = 0; i < keys.length; i++) { - nodesToVisit.push(this.obj[keys[i]]); - } + getDestinations: function WorkerTransport_getDestinations() { + return this.messageHandler.sendWithPromise('GetDestinations', null); + }, - this._walk(nodesToVisit); - return this.capability.promise; + getDestination: function WorkerTransport_getDestination(id) { + return this.messageHandler.sendWithPromise('GetDestination', { id: id }); }, - _walk: function ObjectLoader_walk(nodesToVisit) { - var nodesToRevisit = []; - var pendingRequests = []; - // DFS walk of the object graph. - while (nodesToVisit.length) { - var currentNode = nodesToVisit.pop(); + getAttachments: function WorkerTransport_getAttachments() { + return this.messageHandler.sendWithPromise('GetAttachments', null); + }, - // Only references or chunked streams can cause missing data exceptions. - if (isRef(currentNode)) { - // Skip nodes that have already been visited. - if (this.refSet.has(currentNode)) { - continue; - } - try { - var ref = currentNode; - this.refSet.put(ref); - currentNode = this.xref.fetch(currentNode); - } catch (e) { - if (!(e instanceof MissingDataException)) { - throw e; - } - nodesToRevisit.push(currentNode); - pendingRequests.push({ begin: e.begin, end: e.end }); - } - } - if (currentNode && currentNode.getBaseStreams) { - var baseStreams = currentNode.getBaseStreams(); - var foundMissingData = false; - for (var i = 0; i < baseStreams.length; i++) { - var stream = baseStreams[i]; - if (stream.getMissingChunks && stream.getMissingChunks().length) { - foundMissingData = true; - pendingRequests.push({ - begin: stream.start, - end: stream.end - }); - } - } - if (foundMissingData) { - nodesToRevisit.push(currentNode); - } - } + getJavaScript: function WorkerTransport_getJavaScript() { + return this.messageHandler.sendWithPromise('GetJavaScript', null); + }, - addChildren(currentNode, nodesToVisit); - } + getOutline: function WorkerTransport_getOutline() { + return this.messageHandler.sendWithPromise('GetOutline', null); + }, - if (pendingRequests.length) { - this.xref.stream.manager.requestRanges(pendingRequests).then( - function pendingRequestCallback() { - nodesToVisit = nodesToRevisit; - for (var i = 0; i < nodesToRevisit.length; i++) { - var node = nodesToRevisit[i]; - // Remove any reference nodes from the currrent refset so they - // aren't skipped when we revist them. - if (isRef(node)) { - this.refSet.remove(node); - } + getMetadata: function WorkerTransport_getMetadata() { + return this.messageHandler.sendWithPromise('GetMetadata', null). + then(function transportMetadata(results) { + return { + info: results[0], + metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) + }; + }); + }, + + getStats: function WorkerTransport_getStats() { + return this.messageHandler.sendWithPromise('GetStats', null); + }, + + startCleanup: function WorkerTransport_startCleanup() { + this.messageHandler.sendWithPromise('Cleanup', null). + then(function endCleanup() { + for (var i = 0, ii = this.pageCache.length; i < ii; i++) { + var page = this.pageCache[i]; + if (page) { + page.cleanup(); } - this._walk(nodesToVisit); - }.bind(this), this.capability.reject); - return; - } - // Everything is loaded. - this.refSet = null; - this.capability.resolve(); + } + this.commonObjs.clear(); + this.fontLoader.clear(); + }.bind(this)); } }; + return WorkerTransport; - return ObjectLoader; })(); -exports.Catalog = Catalog; -exports.ObjectLoader = ObjectLoader; -exports.XRef = XRef; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCorePsParser = {}), root.pdfjsSharedUtil, - root.pdfjsCoreParser); +/** + * A PDF document and page is built of many objects. E.g. there are objects + * for fonts, images, rendering code and such. These objects might get processed + * inside of a worker. The `PDFObjects` implements some basic functions to + * manage these objects. + * @ignore + */ +var PDFObjects = (function PDFObjectsClosure() { + function PDFObjects() { + this.objs = {}; } -}(this, function (exports, sharedUtil, coreParser) { -var error = sharedUtil.error; -var EOF = coreParser.EOF; -var Lexer = coreParser.Lexer; + PDFObjects.prototype = { + /** + * Internal function. + * Ensures there is an object defined for `objId`. + */ + ensureObj: function PDFObjects_ensureObj(objId) { + if (this.objs[objId]) { + return this.objs[objId]; + } -var PostScriptParser = (function PostScriptParserClosure() { - function PostScriptParser(lexer) { - this.lexer = lexer; - this.operators = []; - this.token = null; - this.prev = null; - } - PostScriptParser.prototype = { - nextToken: function PostScriptParser_nextToken() { - this.prev = this.token; - this.token = this.lexer.getToken(); + var obj = { + capability: createPromiseCapability(), + data: null, + resolved: false + }; + this.objs[objId] = obj; + + return obj; }, - accept: function PostScriptParser_accept(type) { - if (this.token.type === type) { - this.nextToken(); - return true; + + /** + * If called *without* callback, this returns the data of `objId` but the + * object needs to be resolved. If it isn't, this function throws. + * + * If called *with* a callback, the callback is called with the data of the + * object once the object is resolved. That means, if you call this + * function and the object is already resolved, the callback gets called + * right away. + */ + get: function PDFObjects_get(objId, callback) { + // If there is a callback, then the get can be async and the object is + // not required to be resolved right now + if (callback) { + this.ensureObj(objId).capability.promise.then(callback); + return null; } - return false; - }, - expect: function PostScriptParser_expect(type) { - if (this.accept(type)) { - return true; + + // If there isn't a callback, the user expects to get the resolved data + // directly. + var obj = this.objs[objId]; + + // If there isn't an object yet or the object isn't resolved, then the + // data isn't ready yet! + if (!obj || !obj.resolved) { + error('Requesting object that isn\'t resolved yet ' + objId); } - error('Unexpected symbol: found ' + this.token.type + ' expected ' + - type + '.'); + + return obj.data; }, - parse: function PostScriptParser_parse() { - this.nextToken(); - this.expect(PostScriptTokenTypes.LBRACE); - this.parseBlock(); - this.expect(PostScriptTokenTypes.RBRACE); - return this.operators; + + /** + * Resolves the object `objId` with optional `data`. + */ + resolve: function PDFObjects_resolve(objId, data) { + var obj = this.ensureObj(objId); + + obj.resolved = true; + obj.data = data; + obj.capability.resolve(data); }, - parseBlock: function PostScriptParser_parseBlock() { - while (true) { - if (this.accept(PostScriptTokenTypes.NUMBER)) { - this.operators.push(this.prev.value); - } else if (this.accept(PostScriptTokenTypes.OPERATOR)) { - this.operators.push(this.prev.value); - } else if (this.accept(PostScriptTokenTypes.LBRACE)) { - this.parseCondition(); - } else { - return; - } + + isResolved: function PDFObjects_isResolved(objId) { + var objs = this.objs; + + if (!objs[objId]) { + return false; + } else { + return objs[objId].resolved; } }, - parseCondition: function PostScriptParser_parseCondition() { - // Add two place holders that will be updated later - var conditionLocation = this.operators.length; - this.operators.push(null, null); - this.parseBlock(); - this.expect(PostScriptTokenTypes.RBRACE); - if (this.accept(PostScriptTokenTypes.IF)) { - // The true block is right after the 'if' so it just falls through on - // true else it jumps and skips the true block. - this.operators[conditionLocation] = this.operators.length; - this.operators[conditionLocation + 1] = 'jz'; - } else if (this.accept(PostScriptTokenTypes.LBRACE)) { - var jumpLocation = this.operators.length; - this.operators.push(null, null); - var endOfTrue = this.operators.length; - this.parseBlock(); - this.expect(PostScriptTokenTypes.RBRACE); - this.expect(PostScriptTokenTypes.IFELSE); - // The jump is added at the end of the true block to skip the false - // block. - this.operators[jumpLocation] = this.operators.length; - this.operators[jumpLocation + 1] = 'j'; + hasData: function PDFObjects_hasData(objId) { + return this.isResolved(objId); + }, - this.operators[conditionLocation] = endOfTrue; - this.operators[conditionLocation + 1] = 'jz'; + /** + * Returns the data of `objId` if object exists, null otherwise. + */ + getData: function PDFObjects_getData(objId) { + var objs = this.objs; + if (!objs[objId] || !objs[objId].resolved) { + return null; } else { - error('PS Function: error parsing conditional.'); + return objs[objId].data; } + }, + + clear: function PDFObjects_clear() { + this.objs = {}; } }; - return PostScriptParser; + return PDFObjects; })(); -var PostScriptTokenTypes = { - LBRACE: 0, - RBRACE: 1, - NUMBER: 2, - OPERATOR: 3, - IF: 4, - IFELSE: 5 -}; +/** + * Allows controlling of the rendering tasks. + * @class + * @alias RenderTask + */ +var RenderTask = (function RenderTaskClosure() { + function RenderTask(internalRenderTask) { + this._internalRenderTask = internalRenderTask; -var PostScriptToken = (function PostScriptTokenClosure() { - function PostScriptToken(type, value) { - this.type = type; - this.value = value; + /** + * Callback for incremental rendering -- a function that will be called + * each time the rendering is paused. To continue rendering call the + * function that is the first argument to the callback. + * @type {function} + */ + this.onContinue = null; } - var opCache = {}; + RenderTask.prototype = /** @lends RenderTask.prototype */ { + /** + * Promise for rendering task completion. + * @return {Promise} + */ + get promise() { + return this._internalRenderTask.capability.promise; + }, - PostScriptToken.getOperator = function PostScriptToken_getOperator(op) { - var opValue = opCache[op]; - if (opValue) { - return opValue; + /** + * Cancels the rendering task. If the task is currently rendering it will + * not be cancelled until graphics pauses with a timeout. The promise that + * this object extends will resolved when cancelled. + */ + cancel: function RenderTask_cancel() { + this._internalRenderTask.cancel(); + }, + + /** + * Registers callbacks to indicate the rendering task completion. + * + * @param {function} onFulfilled The callback for the rendering completion. + * @param {function} onRejected The callback for the rendering failure. + * @return {Promise} A promise that is resolved after the onFulfilled or + * onRejected callback. + */ + then: function RenderTask_then(onFulfilled, onRejected) { + return this.promise.then.apply(this.promise, arguments); } - return opCache[op] = new PostScriptToken(PostScriptTokenTypes.OPERATOR, op); }; - PostScriptToken.LBRACE = new PostScriptToken(PostScriptTokenTypes.LBRACE, - '{'); - PostScriptToken.RBRACE = new PostScriptToken(PostScriptTokenTypes.RBRACE, - '}'); - PostScriptToken.IF = new PostScriptToken(PostScriptTokenTypes.IF, 'IF'); - PostScriptToken.IFELSE = new PostScriptToken(PostScriptTokenTypes.IFELSE, - 'IFELSE'); - return PostScriptToken; + return RenderTask; })(); -var PostScriptLexer = (function PostScriptLexerClosure() { - function PostScriptLexer(stream) { - this.stream = stream; - this.nextChar(); +/** + * For internal use only. + * @ignore + */ +var InternalRenderTask = (function InternalRenderTaskClosure() { - this.strBuf = []; + function InternalRenderTask(callback, params, objs, commonObjs, operatorList, + pageNumber) { + this.callback = callback; + this.params = params; + this.objs = objs; + this.commonObjs = commonObjs; + this.operatorListIdx = null; + this.operatorList = operatorList; + this.pageNumber = pageNumber; + this.running = false; + this.graphicsReadyCallback = null; + this.graphicsReady = false; + this.useRequestAnimationFrame = false; + this.cancelled = false; + this.capability = createPromiseCapability(); + this.task = new RenderTask(this); + // caching this-bound methods + this._continueBound = this._continue.bind(this); + this._scheduleNextBound = this._scheduleNext.bind(this); + this._nextBound = this._next.bind(this); } - PostScriptLexer.prototype = { - nextChar: function PostScriptLexer_nextChar() { - return (this.currentChar = this.stream.getByte()); + + InternalRenderTask.prototype = { + + initalizeGraphics: + function InternalRenderTask_initalizeGraphics(transparency) { + + if (this.cancelled) { + return; + } + if (PDFJS.pdfBug && 'StepperManager' in globalScope && + globalScope.StepperManager.enabled) { + this.stepper = globalScope.StepperManager.create(this.pageNumber - 1); + this.stepper.init(this.operatorList); + this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint(); + } + + var params = this.params; + this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, + this.objs, params.imageLayer); + + this.gfx.beginDrawing(params.transform, params.viewport, transparency); + this.operatorListIdx = 0; + this.graphicsReady = true; + if (this.graphicsReadyCallback) { + this.graphicsReadyCallback(); + } }, - getToken: function PostScriptLexer_getToken() { - var comment = false; - var ch = this.currentChar; - // skip comments - while (true) { - if (ch < 0) { - return EOF; - } + cancel: function InternalRenderTask_cancel() { + this.running = false; + this.cancelled = true; + this.callback('cancelled'); + }, - if (comment) { - if (ch === 0x0A || ch === 0x0D) { - comment = false; - } - } else if (ch === 0x25) { // '%' - comment = true; - } else if (!Lexer.isSpace(ch)) { - break; + operatorListChanged: function InternalRenderTask_operatorListChanged() { + if (!this.graphicsReady) { + if (!this.graphicsReadyCallback) { + this.graphicsReadyCallback = this._continueBound; } - ch = this.nextChar(); + return; } - switch (ch | 0) { - case 0x30: case 0x31: case 0x32: case 0x33: case 0x34: // '0'-'4' - case 0x35: case 0x36: case 0x37: case 0x38: case 0x39: // '5'-'9' - case 0x2B: case 0x2D: case 0x2E: // '+', '-', '.' - return new PostScriptToken(PostScriptTokenTypes.NUMBER, - this.getNumber()); - case 0x7B: // '{' - this.nextChar(); - return PostScriptToken.LBRACE; - case 0x7D: // '}' - this.nextChar(); - return PostScriptToken.RBRACE; + + if (this.stepper) { + this.stepper.updateOperatorList(this.operatorList); } - // operator - var strBuf = this.strBuf; - strBuf.length = 0; - strBuf[0] = String.fromCharCode(ch); - while ((ch = this.nextChar()) >= 0 && // and 'A'-'Z', 'a'-'z' - ((ch >= 0x41 && ch <= 0x5A) || (ch >= 0x61 && ch <= 0x7A))) { - strBuf.push(String.fromCharCode(ch)); + if (this.running) { + return; } - var str = strBuf.join(''); - switch (str.toLowerCase()) { - case 'if': - return PostScriptToken.IF; - case 'ifelse': - return PostScriptToken.IFELSE; - default: - return PostScriptToken.getOperator(str); + this._continue(); + }, + + _continue: function InternalRenderTask__continue() { + this.running = true; + if (this.cancelled) { + return; + } + if (this.task.onContinue) { + this.task.onContinue.call(this.task, this._scheduleNextBound); + } else { + this._scheduleNext(); } }, - getNumber: function PostScriptLexer_getNumber() { - var ch = this.currentChar; - var strBuf = this.strBuf; - strBuf.length = 0; - strBuf[0] = String.fromCharCode(ch); - while ((ch = this.nextChar()) >= 0) { - if ((ch >= 0x30 && ch <= 0x39) || // '0'-'9' - ch === 0x2D || ch === 0x2E) { // '-', '.' - strBuf.push(String.fromCharCode(ch)); - } else { - break; + _scheduleNext: function InternalRenderTask__scheduleNext() { + if (this.useRequestAnimationFrame) { + window.requestAnimationFrame(this._nextBound); + } else { + Promise.resolve(undefined).then(this._nextBound); + } + }, + + _next: function InternalRenderTask__next() { + if (this.cancelled) { + return; + } + this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, + this.operatorListIdx, + this._continueBound, + this.stepper); + if (this.operatorListIdx === this.operatorList.argsArray.length) { + this.running = false; + if (this.operatorList.lastChunk) { + this.gfx.endDrawing(); + this.callback(); } } - var value = parseFloat(strBuf.join('')); - if (isNaN(value)) { - error('Invalid floating point number: ' + value); + } + + }; + + return InternalRenderTask; +})(); + +/** + * (Deprecated) Global observer of unsupported feature usages. Use + * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance. + */ +PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() { + var listeners = []; + return { + listen: function (cb) { + deprecated('Global UnsupportedManager.listen is used: ' + + ' use PDFDocumentLoadingTask.onUnsupportedFeature instead'); + listeners.push(cb); + }, + notify: function (featureId) { + for (var i = 0, ii = listeners.length; i < ii; i++) { + listeners[i](featureId); } - return value; } }; - return PostScriptLexer; })(); -exports.PostScriptLexer = PostScriptLexer; -exports.PostScriptParser = PostScriptParser; +exports.getDocument = PDFJS.getDocument; +exports.PDFDataRangeTransport = PDFDataRangeTransport; +exports.PDFDocumentProxy = PDFDocumentProxy; +exports.PDFPageProxy = PDFPageProxy; })); @@ -48165,7 +48177,13 @@ var WorkerTask = (function WorkerTaskClosure() { var WorkerMessageHandler = PDFJS.WorkerMessageHandler = { setup: function wphSetup(handler, port) { + var testMessageProcessed = false; handler.on('test', function wphSetupTest(data) { + if (testMessageProcessed) { + return; // we already processed 'test' message once + } + testMessageProcessed = true; + // check if Uint8Array can be sent to worker if (!(data instanceof Uint8Array)) { handler.send('test', 'main', false); @@ -48692,51 +48710,55 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = { } }; -var consoleTimer = {}; - -var workerConsole = { - log: function log() { - var args = Array.prototype.slice.call(arguments); - globalScope.postMessage({ - targetName: 'main', - action: 'console_log', - data: args - }); - }, - - error: function error() { - var args = Array.prototype.slice.call(arguments); - globalScope.postMessage({ - targetName: 'main', - action: 'console_error', - data: args - }); - throw 'pdf.js execution error'; - }, +function initializeWorker() { + if (!('console' in globalScope)) { + var consoleTimer = {}; + + var workerConsole = { + log: function log() { + var args = Array.prototype.slice.call(arguments); + globalScope.postMessage({ + targetName: 'main', + action: 'console_log', + data: args + }); + }, - time: function time(name) { - consoleTimer[name] = Date.now(); - }, + error: function error() { + var args = Array.prototype.slice.call(arguments); + globalScope.postMessage({ + targetName: 'main', + action: 'console_error', + data: args + }); + throw 'pdf.js execution error'; + }, - timeEnd: function timeEnd(name) { - var time = consoleTimer[name]; - if (!time) { - error('Unknown timer name ' + name); - } - this.log('Timer:', name, Date.now() - time); - } -}; + time: function time(name) { + consoleTimer[name] = Date.now(); + }, + timeEnd: function timeEnd(name) { + var time = consoleTimer[name]; + if (!time) { + error('Unknown timer name ' + name); + } + this.log('Timer:', name, Date.now() - time); + } + }; -// Worker thread? -if (typeof window === 'undefined' && - !(typeof module !== 'undefined' && module.require)) { - if (!('console' in globalScope)) { globalScope.console = workerConsole; } var handler = new MessageHandler('worker', 'main', self); WorkerMessageHandler.setup(handler, self); + handler.send('ready', null); +} + +// Worker thread (and not node.js)? +if (typeof window === 'undefined' && + !(typeof module !== 'undefined' && module.require)) { + initializeWorker(); } exports.WorkerTask = WorkerTask; diff --git a/build/pdf.js b/build/pdf.js index 2c96e3f4e..762272e2e 100644 --- a/build/pdf.js +++ b/build/pdf.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { typeof global !== 'undefined' ? global : this).PDFJS = {}; } -PDFJS.version = '1.3.137'; -PDFJS.build = 'b8e7efa'; +PDFJS.version = '1.3.142'; +PDFJS.build = 'e8db825'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -57,6 +57,74 @@ PDFJS.build = 'b8e7efa'; })); +(function (root, factory) { + { + factory((root.pdfjsDisplayDOMUtils = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; + +/** + * Optimised CSS custom property getter/setter. + * @class + */ +var CustomStyle = (function CustomStyleClosure() { + + // As noted on: http://www.zachstronaut.com/posts/2009/02/17/ + // animate-css-transforms-firefox-webkit.html + // in some versions of IE9 it is critical that ms appear in this list + // before Moz + var prefixes = ['ms', 'Moz', 'Webkit', 'O']; + var _cache = {}; + + function CustomStyle() {} + + CustomStyle.getProp = function get(propName, element) { + // check cache only when no element is given + if (arguments.length === 1 && typeof _cache[propName] === 'string') { + return _cache[propName]; + } + + element = element || document.documentElement; + var style = element.style, prefixed, uPropName; + + // test standard property first + if (typeof style[propName] === 'string') { + return (_cache[propName] = propName); + } + + // capitalize + uPropName = propName.charAt(0).toUpperCase() + propName.slice(1); + + // test vendor specific properties + for (var i = 0, l = prefixes.length; i < l; i++) { + prefixed = prefixes[i] + uPropName; + if (typeof style[prefixed] === 'string') { + return (_cache[propName] = prefixed); + } + } + + //if all fails then set to undefined + return (_cache[propName] = 'undefined'); + }; + + CustomStyle.setProp = function set(propName, element, str) { + var prop = this.getProp(propName); + if (prop !== 'undefined') { + element.style[prop] = str; + } + }; + + return CustomStyle; +})(); + +PDFJS.CustomStyle = CustomStyle; + +exports.CustomStyle = CustomStyle; +})); + + (function (root, factory) { { factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal); @@ -1727,74 +1795,6 @@ exports.warn = warn; })); -(function (root, factory) { - { - factory((root.pdfjsDisplayDOMUtils = {}), root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedGlobal) { - -var PDFJS = sharedGlobal.PDFJS; - -/** - * Optimised CSS custom property getter/setter. - * @class - */ -var CustomStyle = (function CustomStyleClosure() { - - // As noted on: http://www.zachstronaut.com/posts/2009/02/17/ - // animate-css-transforms-firefox-webkit.html - // in some versions of IE9 it is critical that ms appear in this list - // before Moz - var prefixes = ['ms', 'Moz', 'Webkit', 'O']; - var _cache = {}; - - function CustomStyle() {} - - CustomStyle.getProp = function get(propName, element) { - // check cache only when no element is given - if (arguments.length === 1 && typeof _cache[propName] === 'string') { - return _cache[propName]; - } - - element = element || document.documentElement; - var style = element.style, prefixed, uPropName; - - // test standard property first - if (typeof style[propName] === 'string') { - return (_cache[propName] = propName); - } - - // capitalize - uPropName = propName.charAt(0).toUpperCase() + propName.slice(1); - - // test vendor specific properties - for (var i = 0, l = prefixes.length; i < l; i++) { - prefixed = prefixes[i] + uPropName; - if (typeof style[prefixed] === 'string') { - return (_cache[propName] = prefixed); - } - } - - //if all fails then set to undefined - return (_cache[propName] = 'undefined'); - }; - - CustomStyle.setProp = function set(propName, element, str) { - var prop = this.getProp(propName); - if (prop !== 'undefined') { - element.style[prop] = str; - } - }; - - return CustomStyle; -})(); - -PDFJS.CustomStyle = CustomStyle; - -exports.CustomStyle = CustomStyle; -})); - - (function (root, factory) { { factory((root.pdfjsDisplayAnnotationLayer = {}), root.pdfjsSharedUtil, @@ -2974,6560 +2974,6587 @@ exports.Metadata = Metadata; (function (root, factory) { { - factory((root.pdfjsDisplayTextLayer = {}), root.pdfjsSharedUtil); + factory((root.pdfjsDisplaySVG = {}), root.pdfjsSharedUtil); } }(this, function (exports, sharedUtil) { -var createPromiseCapability = sharedUtil.createPromiseCapability; - -/** - * Text layer render parameters. - * - * @typedef {Object} TextLayerRenderParameters - * @property {TextContent} textContent - Text content to render (the object is - * returned by the page's getTextContent() method). - * @property {HTMLElement} container - HTML element that will contain text runs. - * @property {PDFJS.PageViewport} viewport - The target viewport to properly - * layout the text runs. - * @property {Array} textDivs - (optional) HTML elements that are correspond - * the text items of the textContent input. This is output and shall be - * initially be set to empty array. - * @property {number} timeout - (optional) Delay in milliseconds before - * rendering of the text runs occurs. - */ -var renderTextLayer = (function renderTextLayerClosure() { - var MAX_TEXT_DIVS_TO_RENDER = 100000; - - var NonWhitespaceRegexp = /\S/; +var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; +var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; +var ImageKind = sharedUtil.ImageKind; +var OPS = sharedUtil.OPS; +var Util = sharedUtil.Util; +var isNum = sharedUtil.isNum; +var isArray = sharedUtil.isArray; +var warn = sharedUtil.warn; - function isAllWhitespace(str) { - return !NonWhitespaceRegexp.test(str); - } +var SVG_DEFAULTS = { + fontStyle: 'normal', + fontWeight: 'normal', + fillColor: '#000000' +}; - function appendText(textDivs, viewport, geom, styles) { - var style = styles[geom.fontName]; - var textDiv = document.createElement('div'); - textDivs.push(textDiv); - if (isAllWhitespace(geom.str)) { - textDiv.dataset.isWhitespace = true; - return; - } - var tx = PDFJS.Util.transform(viewport.transform, geom.transform); - var angle = Math.atan2(tx[1], tx[0]); - if (style.vertical) { - angle += Math.PI / 2; - } - var fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3])); - var fontAscent = fontHeight; - if (style.ascent) { - fontAscent = style.ascent * fontAscent; - } else if (style.descent) { - fontAscent = (1 + style.descent) * fontAscent; - } +var convertImgDataToPng = (function convertImgDataToPngClosure() { + var PNG_HEADER = + new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]); - var left; - var top; - if (angle === 0) { - left = tx[4]; - top = tx[5] - fontAscent; - } else { - left = tx[4] + (fontAscent * Math.sin(angle)); - top = tx[5] - (fontAscent * Math.cos(angle)); - } - textDiv.style.left = left + 'px'; - textDiv.style.top = top + 'px'; - textDiv.style.fontSize = fontHeight + 'px'; - textDiv.style.fontFamily = style.fontFamily; + var CHUNK_WRAPPER_SIZE = 12; - textDiv.textContent = geom.str; - // |fontName| is only used by the Font Inspector. This test will succeed - // when e.g. the Font Inspector is off but the Stepper is on, but it's - // not worth the effort to do a more accurate test. - if (PDFJS.pdfBug) { - textDiv.dataset.fontName = geom.fontName; - } - // Storing into dataset will convert number into string. - if (angle !== 0) { - textDiv.dataset.angle = angle * (180 / Math.PI); - } - // We don't bother scaling single-char text divs, because it has very - // little effect on text highlighting. This makes scrolling on docs with - // lots of such divs a lot faster. - if (geom.str.length > 1) { - if (style.vertical) { - textDiv.dataset.canvasWidth = geom.height * viewport.scale; + var crcTable = new Int32Array(256); + for (var i = 0; i < 256; i++) { + var c = i; + for (var h = 0; h < 8; h++) { + if (c & 1) { + c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff); } else { - textDiv.dataset.canvasWidth = geom.width * viewport.scale; + c = (c >> 1) & 0x7fffffff; } } + crcTable[i] = c; } - function render(task) { - if (task._canceled) { - return; + function crc32(data, start, end) { + var crc = -1; + for (var i = start; i < end; i++) { + var a = (crc ^ data[i]) & 0xff; + var b = crcTable[a]; + crc = (crc >>> 8) ^ b; } - var textLayerFrag = task._container; - var textDivs = task._textDivs; - var capability = task._capability; - var textDivsLength = textDivs.length; + return crc ^ -1; + } - // No point in rendering many divs as it would make the browser - // unusable even after the divs are rendered. - if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) { - capability.resolve(); - return; - } + function writePngChunk(type, body, data, offset) { + var p = offset; + var len = body.length; - var canvas = document.createElement('canvas'); - canvas.mozOpaque = true; - var ctx = canvas.getContext('2d', {alpha: false}); + data[p] = len >> 24 & 0xff; + data[p + 1] = len >> 16 & 0xff; + data[p + 2] = len >> 8 & 0xff; + data[p + 3] = len & 0xff; + p += 4; - var lastFontSize; - var lastFontFamily; - for (var i = 0; i < textDivsLength; i++) { - var textDiv = textDivs[i]; - if (textDiv.dataset.isWhitespace !== undefined) { - continue; - } + data[p] = type.charCodeAt(0) & 0xff; + data[p + 1] = type.charCodeAt(1) & 0xff; + data[p + 2] = type.charCodeAt(2) & 0xff; + data[p + 3] = type.charCodeAt(3) & 0xff; + p += 4; - var fontSize = textDiv.style.fontSize; - var fontFamily = textDiv.style.fontFamily; + data.set(body, p); + p += body.length; - // Only build font string and set to context if different from last. - if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) { - ctx.font = fontSize + ' ' + fontFamily; - lastFontSize = fontSize; - lastFontFamily = fontFamily; - } + var crc = crc32(data, offset + 4, p); - var width = ctx.measureText(textDiv.textContent).width; - if (width > 0) { - textLayerFrag.appendChild(textDiv); - var transform; - if (textDiv.dataset.canvasWidth !== undefined) { - // Dataset values come of type string. - var textScale = textDiv.dataset.canvasWidth / width; - transform = 'scaleX(' + textScale + ')'; - } else { - transform = ''; - } - var rotation = textDiv.dataset.angle; - if (rotation) { - transform = 'rotate(' + rotation + 'deg) ' + transform; - } - if (transform) { - PDFJS.CustomStyle.setProp('transform' , textDiv, transform); - } - } - } - capability.resolve(); + data[p] = crc >> 24 & 0xff; + data[p + 1] = crc >> 16 & 0xff; + data[p + 2] = crc >> 8 & 0xff; + data[p + 3] = crc & 0xff; } - /** - * Text layer rendering task. - * - * @param {TextContent} textContent - * @param {HTMLElement} container - * @param {PDFJS.PageViewport} viewport - * @param {Array} textDivs - * @private - */ - function TextLayerRenderTask(textContent, container, viewport, textDivs) { - this._textContent = textContent; - this._container = container; - this._viewport = viewport; - textDivs = textDivs || []; - this._textDivs = textDivs; - this._canceled = false; - this._capability = createPromiseCapability(); - this._renderTimer = null; + function adler32(data, start, end) { + var a = 1; + var b = 0; + for (var i = start; i < end; ++i) { + a = (a + (data[i] & 0xff)) % 65521; + b = (b + a) % 65521; + } + return (b << 16) | a; } - TextLayerRenderTask.prototype = { - get promise() { - return this._capability.promise; - }, - cancel: function TextLayer_cancel() { - this._canceled = true; - if (this._renderTimer !== null) { - clearTimeout(this._renderTimer); - this._renderTimer = null; - } - this._capability.reject('canceled'); - }, + function encode(imgData, kind) { + var width = imgData.width; + var height = imgData.height; + var bitDepth, colorType, lineSize; + var bytes = imgData.data; - _render: function TextLayer_render(timeout) { - var textItems = this._textContent.items; - var styles = this._textContent.styles; - var textDivs = this._textDivs; - var viewport = this._viewport; - for (var i = 0, len = textItems.length; i < len; i++) { - appendText(textDivs, viewport, textItems[i], styles); - } + switch (kind) { + case ImageKind.GRAYSCALE_1BPP: + colorType = 0; + bitDepth = 1; + lineSize = (width + 7) >> 3; + break; + case ImageKind.RGB_24BPP: + colorType = 2; + bitDepth = 8; + lineSize = width * 3; + break; + case ImageKind.RGBA_32BPP: + colorType = 6; + bitDepth = 8; + lineSize = width * 4; + break; + default: + throw new Error('invalid format'); + } - if (!timeout) { // Render right away - render(this); - } else { // Schedule - var self = this; - this._renderTimer = setTimeout(function() { - render(self); - self._renderTimer = null; - }, timeout); + // prefix every row with predictor 0 + var literals = new Uint8Array((1 + lineSize) * height); + var offsetLiterals = 0, offsetBytes = 0; + var y, i; + for (y = 0; y < height; ++y) { + literals[offsetLiterals++] = 0; // no prediction + literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize), + offsetLiterals); + offsetBytes += lineSize; + offsetLiterals += lineSize; + } + + if (kind === ImageKind.GRAYSCALE_1BPP) { + // inverting for B/W + offsetLiterals = 0; + for (y = 0; y < height; y++) { + offsetLiterals++; // skipping predictor + for (i = 0; i < lineSize; i++) { + literals[offsetLiterals++] ^= 0xFF; + } } } - }; + var ihdr = new Uint8Array([ + width >> 24 & 0xff, + width >> 16 & 0xff, + width >> 8 & 0xff, + width & 0xff, + height >> 24 & 0xff, + height >> 16 & 0xff, + height >> 8 & 0xff, + height & 0xff, + bitDepth, // bit depth + colorType, // color type + 0x00, // compression method + 0x00, // filter method + 0x00 // interlace method + ]); - /** - * Starts rendering of the text layer. - * - * @param {TextLayerRenderParameters} renderParameters - * @returns {TextLayerRenderTask} - */ - function renderTextLayer(renderParameters) { - var task = new TextLayerRenderTask(renderParameters.textContent, - renderParameters.container, - renderParameters.viewport, - renderParameters.textDivs); - task._render(renderParameters.timeout); - return task; - } + var len = literals.length; + var maxBlockLength = 0xFFFF; - return renderTextLayer; -})(); + var deflateBlocks = Math.ceil(len / maxBlockLength); + var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4); + var pi = 0; + idat[pi++] = 0x78; // compression method and flags + idat[pi++] = 0x9c; // flags -PDFJS.renderTextLayer = renderTextLayer; + var pos = 0; + while (len > maxBlockLength) { + // writing non-final DEFLATE blocks type 0 and length of 65535 + idat[pi++] = 0x00; + idat[pi++] = 0xff; + idat[pi++] = 0xff; + idat[pi++] = 0x00; + idat[pi++] = 0x00; + idat.set(literals.subarray(pos, pos + maxBlockLength), pi); + pi += maxBlockLength; + pos += maxBlockLength; + len -= maxBlockLength; + } -exports.renderTextLayer = renderTextLayer; -})); + // writing non-final DEFLATE blocks type 0 + idat[pi++] = 0x01; + idat[pi++] = len & 0xff; + idat[pi++] = len >> 8 & 0xff; + idat[pi++] = (~len & 0xffff) & 0xff; + idat[pi++] = (~len & 0xffff) >> 8 & 0xff; + idat.set(literals.subarray(pos), pi); + pi += literals.length - pos; + + var adler = adler32(literals, 0, literals.length); // checksum + idat[pi++] = adler >> 24 & 0xff; + idat[pi++] = adler >> 16 & 0xff; + idat[pi++] = adler >> 8 & 0xff; + idat[pi++] = adler & 0xff; + // PNG will consists: header, IHDR+data, IDAT+data, and IEND. + var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) + + ihdr.length + idat.length; + var data = new Uint8Array(pngLength); + var offset = 0; + data.set(PNG_HEADER, offset); + offset += PNG_HEADER.length; + writePngChunk('IHDR', ihdr, data, offset); + offset += CHUNK_WRAPPER_SIZE + ihdr.length; + writePngChunk('IDATA', idat, data, offset); + offset += CHUNK_WRAPPER_SIZE + idat.length; + writePngChunk('IEND', new Uint8Array(0), data, offset); -(function (root, factory) { - { - factory((root.pdfjsDisplayWebGL = {}), root.pdfjsSharedUtil); + return PDFJS.createObjectURL(data, 'image/png'); } -}(this, function (exports, sharedUtil) { -var shadow = sharedUtil.shadow; + return function convertImgDataToPng(imgData) { + var kind = (imgData.kind === undefined ? + ImageKind.GRAYSCALE_1BPP : imgData.kind); + return encode(imgData, kind); + }; +})(); -var WebGLUtils = (function WebGLUtilsClosure() { - function loadShader(gl, code, shaderType) { - var shader = gl.createShader(shaderType); - gl.shaderSource(shader, code); - gl.compileShader(shader); - var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); - if (!compiled) { - var errorMsg = gl.getShaderInfoLog(shader); - throw new Error('Error during shader compilation: ' + errorMsg); - } - return shader; - } - function createVertexShader(gl, code) { - return loadShader(gl, code, gl.VERTEX_SHADER); - } - function createFragmentShader(gl, code) { - return loadShader(gl, code, gl.FRAGMENT_SHADER); - } - function createProgram(gl, shaders) { - var program = gl.createProgram(); - for (var i = 0, ii = shaders.length; i < ii; ++i) { - gl.attachShader(program, shaders[i]); - } - gl.linkProgram(program); - var linked = gl.getProgramParameter(program, gl.LINK_STATUS); - if (!linked) { - var errorMsg = gl.getProgramInfoLog(program); - throw new Error('Error during program linking: ' + errorMsg); - } - return program; - } - function createTexture(gl, image, textureId) { - gl.activeTexture(textureId); - var texture = gl.createTexture(); - gl.bindTexture(gl.TEXTURE_2D, texture); - - // Set the parameters so we can render any size image. - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); - gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); - - // Upload the image into the texture. - gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); - return texture; - } - - var currentGL, currentCanvas; - function generateGL() { - if (currentGL) { - return; - } - currentCanvas = document.createElement('canvas'); - currentGL = currentCanvas.getContext('webgl', - { premultipliedalpha: false }); - } - - var smaskVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec2 a_texCoord; \ - \ - uniform vec2 u_resolution; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_texCoord = a_texCoord; \ - } '; +var SVGExtraState = (function SVGExtraStateClosure() { + function SVGExtraState() { + this.fontSizeScale = 1; + this.fontWeight = SVG_DEFAULTS.fontWeight; + this.fontSize = 0; - var smaskFragmentShaderCode = '\ - precision mediump float; \ - \ - uniform vec4 u_backdrop; \ - uniform int u_subtype; \ - uniform sampler2D u_image; \ - uniform sampler2D u_mask; \ - \ - varying vec2 v_texCoord; \ - \ - void main() { \ - vec4 imageColor = texture2D(u_image, v_texCoord); \ - vec4 maskColor = texture2D(u_mask, v_texCoord); \ - if (u_backdrop.a > 0.0) { \ - maskColor.rgb = maskColor.rgb * maskColor.a + \ - u_backdrop.rgb * (1.0 - maskColor.a); \ - } \ - float lum; \ - if (u_subtype == 0) { \ - lum = maskColor.a; \ - } else { \ - lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ - maskColor.b * 0.11; \ - } \ - imageColor.a *= lum; \ - imageColor.rgb *= imageColor.a; \ - gl_FragColor = imageColor; \ - } '; + this.textMatrix = IDENTITY_MATRIX; + this.fontMatrix = FONT_IDENTITY_MATRIX; + this.leading = 0; - var smaskCache = null; + // Current point (in user coordinates) + this.x = 0; + this.y = 0; - function initSmaskGL() { - var canvas, gl; + // Start of text line (in text coordinates) + this.lineX = 0; + this.lineY = 0; - generateGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; + // Character and word spacing + this.charSpacing = 0; + this.wordSpacing = 0; + this.textHScale = 1; + this.textRise = 0; - // setup a GLSL program - var vertexShader = createVertexShader(gl, smaskVertexShaderCode); - var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); + // Default foreground and background colors + this.fillColor = SVG_DEFAULTS.fillColor; + this.strokeColor = '#000000'; - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); - cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); + this.fillAlpha = 1; + this.strokeAlpha = 1; + this.lineWidth = 1; + this.lineJoin = ''; + this.lineCap = ''; + this.miterLimit = 0; - var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); - var texLayerLocation = gl.getUniformLocation(program, 'u_image'); - var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); + this.dashArray = []; + this.dashPhase = 0; - // provide texture coordinates for the rectangle. - var texCoordBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0.0, 0.0, - 1.0, 0.0, - 0.0, 1.0, - 0.0, 1.0, - 1.0, 0.0, - 1.0, 1.0]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(texCoordLocation); - gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); + this.dependencies = []; - gl.uniform1i(texLayerLocation, 0); - gl.uniform1i(texMaskLocation, 1); + // Clipping + this.clipId = ''; + this.pendingClip = false; - smaskCache = cache; + this.maskId = ''; } - function composeSMask(layer, mask, properties) { - var width = layer.width, height = layer.height; - - if (!smaskCache) { - initSmaskGL(); - } - var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); - - if (properties.backdrop) { - gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], - properties.backdrop[1], properties.backdrop[2], 1); - } else { - gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); + SVGExtraState.prototype = { + clone: function SVGExtraState_clone() { + return Object.create(this); + }, + setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) { + this.x = x; + this.y = y; } - gl.uniform1i(cache.subtypeLocation, - properties.subtype === 'Luminosity' ? 1 : 0); - - // Create a textures - var texture = createTexture(gl, layer, gl.TEXTURE0); - var maskTexture = createTexture(gl, mask, gl.TEXTURE1); - - - // Create a buffer and put a single clipspace rectangle in - // it (2 triangles) - var buffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, buffer); - gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ - 0, 0, - width, 0, - 0, height, - 0, height, - width, 0, - width, height]), gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - - // draw - gl.clearColor(0, 0, 0, 0); - gl.enable(gl.BLEND); - gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); - gl.clear(gl.COLOR_BUFFER_BIT); + }; + return SVGExtraState; +})(); - gl.drawArrays(gl.TRIANGLES, 0, 6); +var SVGGraphics = (function SVGGraphicsClosure() { + function createScratchSVG(width, height) { + var NS = 'http://www.w3.org/2000/svg'; + var svg = document.createElementNS(NS, 'svg:svg'); + svg.setAttributeNS(null, 'version', '1.1'); + svg.setAttributeNS(null, 'width', width + 'px'); + svg.setAttributeNS(null, 'height', height + 'px'); + svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height); + return svg; + } - gl.flush(); + function opListToTree(opList) { + var opTree = []; + var tmp = []; + var opListLen = opList.length; - gl.deleteTexture(texture); - gl.deleteTexture(maskTexture); - gl.deleteBuffer(buffer); + for (var x = 0; x < opListLen; x++) { + if (opList[x].fn === 'save') { + opTree.push({'fnId': 92, 'fn': 'group', 'items': []}); + tmp.push(opTree); + opTree = opTree[opTree.length - 1].items; + continue; + } - return canvas; + if(opList[x].fn === 'restore') { + opTree = tmp.pop(); + } else { + opTree.push(opList[x]); + } + } + return opTree; } - var figuresVertexShaderCode = '\ - attribute vec2 a_position; \ - attribute vec3 a_color; \ - \ - uniform vec2 u_resolution; \ - uniform vec2 u_scale; \ - uniform vec2 u_offset; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - vec2 position = (a_position + u_offset) * u_scale; \ - vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ - gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ - \ - v_color = vec4(a_color / 255.0, 1.0); \ - } '; - - var figuresFragmentShaderCode = '\ - precision mediump float; \ - \ - varying vec4 v_color; \ - \ - void main() { \ - gl_FragColor = v_color; \ - } '; + /** + * Formats float number. + * @param value {number} number to format. + * @returns {string} + */ + function pf(value) { + if (value === (value | 0)) { // integer number + return value.toString(); + } + var s = value.toFixed(10); + var i = s.length - 1; + if (s[i] !== '0') { + return s; + } + // removing trailing zeros + do { + i--; + } while (s[i] === '0'); + return s.substr(0, s[i] === '.' ? i : i + 1); + } - var figuresCache = null; + /** + * Formats transform matrix. The standard rotation, scale and translate + * matrices are replaced by their shorter forms, and for identity matrix + * returns empty string to save the memory. + * @param m {Array} matrix to format. + * @returns {string} + */ + function pm(m) { + if (m[4] === 0 && m[5] === 0) { + if (m[1] === 0 && m[2] === 0) { + if (m[0] === 1 && m[3] === 1) { + return ''; + } + return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')'; + } + if (m[0] === m[3] && m[1] === -m[2]) { + var a = Math.acos(m[0]) * 180 / Math.PI; + return 'rotate(' + pf(a) + ')'; + } + } else { + if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) { + return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')'; + } + } + return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' + + pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')'; + } - function initFiguresGL() { - var canvas, gl; + function SVGGraphics(commonObjs, objs) { + this.current = new SVGExtraState(); + this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix + this.transformStack = []; + this.extraStack = []; + this.commonObjs = commonObjs; + this.objs = objs; + this.pendingEOFill = false; - generateGL(); - canvas = currentCanvas; - currentCanvas = null; - gl = currentGL; - currentGL = null; + this.embedFonts = false; + this.embeddedFonts = {}; + this.cssStyle = null; + } - // setup a GLSL program - var vertexShader = createVertexShader(gl, figuresVertexShaderCode); - var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); - var program = createProgram(gl, [vertexShader, fragmentShader]); - gl.useProgram(program); + var NS = 'http://www.w3.org/2000/svg'; + var XML_NS = 'http://www.w3.org/XML/1998/namespace'; + var XLINK_NS = 'http://www.w3.org/1999/xlink'; + var LINE_CAP_STYLES = ['butt', 'round', 'square']; + var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; + var clipCount = 0; + var maskCount = 0; - var cache = {}; - cache.gl = gl; - cache.canvas = canvas; - cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); - cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); - cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); - cache.positionLocation = gl.getAttribLocation(program, 'a_position'); - cache.colorLocation = gl.getAttribLocation(program, 'a_color'); + SVGGraphics.prototype = { + save: function SVGGraphics_save() { + this.transformStack.push(this.transformMatrix); + var old = this.current; + this.extraStack.push(old); + this.current = old.clone(); + }, - figuresCache = cache; - } + restore: function SVGGraphics_restore() { + this.transformMatrix = this.transformStack.pop(); + this.current = this.extraStack.pop(); - function drawFigures(width, height, backgroundColor, figures, context) { - if (!figuresCache) { - initFiguresGL(); - } - var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.pgrp.appendChild(this.tgrp); + }, - canvas.width = width; - canvas.height = height; - gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); - gl.uniform2f(cache.resolutionLocation, width, height); + group: function SVGGraphics_group(items) { + this.save(); + this.executeOpTree(items); + this.restore(); + }, - // count triangle points - var count = 0; - var i, ii, rows; - for (i = 0, ii = figures.length; i < ii; i++) { - switch (figures[i].type) { - case 'lattice': - rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; - count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; - break; - case 'triangles': - count += figures[i].coords.length; - break; - } - } - // transfer data - var coords = new Float32Array(count * 2); - var colors = new Uint8Array(count * 3); - var coordsMap = context.coords, colorsMap = context.colors; - var pIndex = 0, cIndex = 0; - for (i = 0, ii = figures.length; i < ii; i++) { - var figure = figures[i], ps = figure.coords, cs = figure.colors; - switch (figure.type) { - case 'lattice': - var cols = figure.verticesPerRow; - rows = (ps.length / cols) | 0; - for (var row = 1; row < rows; row++) { - var offset = row * cols + 1; - for (var col = 1; col < cols; col++, offset++) { - coords[pIndex] = coordsMap[ps[offset - cols - 1]]; - coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; - coords[pIndex + 2] = coordsMap[ps[offset - cols]]; - coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; - coords[pIndex + 4] = coordsMap[ps[offset - 1]]; - coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; - colors[cIndex] = colorsMap[cs[offset - cols - 1]]; - colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; - colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; - colors[cIndex + 3] = colorsMap[cs[offset - cols]]; - colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; - colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; - colors[cIndex + 6] = colorsMap[cs[offset - 1]]; - colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; - colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; + loadDependencies: function SVGGraphics_loadDependencies(operatorList) { + var fnArray = operatorList.fnArray; + var fnArrayLen = fnArray.length; + var argsArray = operatorList.argsArray; - coords[pIndex + 6] = coords[pIndex + 2]; - coords[pIndex + 7] = coords[pIndex + 3]; - coords[pIndex + 8] = coords[pIndex + 4]; - coords[pIndex + 9] = coords[pIndex + 5]; - coords[pIndex + 10] = coordsMap[ps[offset]]; - coords[pIndex + 11] = coordsMap[ps[offset] + 1]; - colors[cIndex + 9] = colors[cIndex + 3]; - colors[cIndex + 10] = colors[cIndex + 4]; - colors[cIndex + 11] = colors[cIndex + 5]; - colors[cIndex + 12] = colors[cIndex + 6]; - colors[cIndex + 13] = colors[cIndex + 7]; - colors[cIndex + 14] = colors[cIndex + 8]; - colors[cIndex + 15] = colorsMap[cs[offset]]; - colors[cIndex + 16] = colorsMap[cs[offset] + 1]; - colors[cIndex + 17] = colorsMap[cs[offset] + 2]; - pIndex += 12; - cIndex += 18; + var self = this; + for (var i = 0; i < fnArrayLen; i++) { + if (OPS.dependency === fnArray[i]) { + var deps = argsArray[i]; + for (var n = 0, nn = deps.length; n < nn; n++) { + var obj = deps[n]; + var common = obj.substring(0, 2) === 'g_'; + var promise; + if (common) { + promise = new Promise(function(resolve) { + self.commonObjs.get(obj, resolve); + }); + } else { + promise = new Promise(function(resolve) { + self.objs.get(obj, resolve); + }); } + this.current.dependencies.push(promise); } - break; - case 'triangles': - for (var j = 0, jj = ps.length; j < jj; j++) { - coords[pIndex] = coordsMap[ps[j]]; - coords[pIndex + 1] = coordsMap[ps[j] + 1]; - colors[cIndex] = colorsMap[cs[j]]; - colors[cIndex + 1] = colorsMap[cs[j] + 1]; - colors[cIndex + 2] = colorsMap[cs[j] + 2]; - pIndex += 2; - cIndex += 3; - } - break; + } } - } - - // draw - if (backgroundColor) { - gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, - backgroundColor[2] / 255, 1.0); - } else { - gl.clearColor(0, 0, 0, 0); - } - gl.clear(gl.COLOR_BUFFER_BIT); + return Promise.all(this.current.dependencies); + }, - var coordsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.positionLocation); - gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); + transform: function SVGGraphics_transform(a, b, c, d, e, f) { + var transformMatrix = [a, b, c, d, e, f]; + this.transformMatrix = PDFJS.Util.transform(this.transformMatrix, + transformMatrix); - var colorsBuffer = gl.createBuffer(); - gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); - gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); - gl.enableVertexAttribArray(cache.colorLocation); - gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, - 0, 0); + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + }, - gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); - gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); + getSVG: function SVGGraphics_getSVG(operatorList, viewport) { + this.svg = createScratchSVG(viewport.width, viewport.height); + this.viewport = viewport; - gl.drawArrays(gl.TRIANGLES, 0, count); + return this.loadDependencies(operatorList).then(function () { + this.transformMatrix = IDENTITY_MATRIX; + this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group + this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform)); + this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.defs = document.createElementNS(NS, 'svg:defs'); + this.pgrp.appendChild(this.defs); + this.pgrp.appendChild(this.tgrp); + this.svg.appendChild(this.pgrp); + var opTree = this.convertOpList(operatorList); + this.executeOpTree(opTree); + return this.svg; + }.bind(this)); + }, - gl.flush(); + convertOpList: function SVGGraphics_convertOpList(operatorList) { + var argsArray = operatorList.argsArray; + var fnArray = operatorList.fnArray; + var fnArrayLen = fnArray.length; + var REVOPS = []; + var opList = []; - gl.deleteBuffer(coordsBuffer); - gl.deleteBuffer(colorsBuffer); + for (var op in OPS) { + REVOPS[OPS[op]] = op; + } - return canvas; - } + for (var x = 0; x < fnArrayLen; x++) { + var fnId = fnArray[x]; + opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]}); + } + return opListToTree(opList); + }, - function cleanup() { - if (smaskCache && smaskCache.canvas) { - smaskCache.canvas.width = 0; - smaskCache.canvas.height = 0; - } - if (figuresCache && figuresCache.canvas) { - figuresCache.canvas.width = 0; - figuresCache.canvas.height = 0; - } - smaskCache = null; - figuresCache = null; - } + executeOpTree: function SVGGraphics_executeOpTree(opTree) { + var opTreeLen = opTree.length; + for(var x = 0; x < opTreeLen; x++) { + var fn = opTree[x].fn; + var fnId = opTree[x].fnId; + var args = opTree[x].args; - return { - get isEnabled() { - if (PDFJS.disableWebGL) { - return false; + switch (fnId | 0) { + case OPS.beginText: + this.beginText(); + break; + case OPS.setLeading: + this.setLeading(args); + break; + case OPS.setLeadingMoveText: + this.setLeadingMoveText(args[0], args[1]); + break; + case OPS.setFont: + this.setFont(args); + break; + case OPS.showText: + this.showText(args[0]); + break; + case OPS.showSpacedText: + this.showText(args[0]); + break; + case OPS.endText: + this.endText(); + break; + case OPS.moveText: + this.moveText(args[0], args[1]); + break; + case OPS.setCharSpacing: + this.setCharSpacing(args[0]); + break; + case OPS.setWordSpacing: + this.setWordSpacing(args[0]); + break; + case OPS.setHScale: + this.setHScale(args[0]); + break; + case OPS.setTextMatrix: + this.setTextMatrix(args[0], args[1], args[2], + args[3], args[4], args[5]); + break; + case OPS.setLineWidth: + this.setLineWidth(args[0]); + break; + case OPS.setLineJoin: + this.setLineJoin(args[0]); + break; + case OPS.setLineCap: + this.setLineCap(args[0]); + break; + case OPS.setMiterLimit: + this.setMiterLimit(args[0]); + break; + case OPS.setFillRGBColor: + this.setFillRGBColor(args[0], args[1], args[2]); + break; + case OPS.setStrokeRGBColor: + this.setStrokeRGBColor(args[0], args[1], args[2]); + break; + case OPS.setDash: + this.setDash(args[0], args[1]); + break; + case OPS.setGState: + this.setGState(args[0]); + break; + case OPS.fill: + this.fill(); + break; + case OPS.eoFill: + this.eoFill(); + break; + case OPS.stroke: + this.stroke(); + break; + case OPS.fillStroke: + this.fillStroke(); + break; + case OPS.eoFillStroke: + this.eoFillStroke(); + break; + case OPS.clip: + this.clip('nonzero'); + break; + case OPS.eoClip: + this.clip('evenodd'); + break; + case OPS.paintSolidColorImageMask: + this.paintSolidColorImageMask(); + break; + case OPS.paintJpegXObject: + this.paintJpegXObject(args[0], args[1], args[2]); + break; + case OPS.paintImageXObject: + this.paintImageXObject(args[0]); + break; + case OPS.paintInlineImageXObject: + this.paintInlineImageXObject(args[0]); + break; + case OPS.paintImageMaskXObject: + this.paintImageMaskXObject(args[0]); + break; + case OPS.paintFormXObjectBegin: + this.paintFormXObjectBegin(args[0], args[1]); + break; + case OPS.paintFormXObjectEnd: + this.paintFormXObjectEnd(); + break; + case OPS.closePath: + this.closePath(); + break; + case OPS.closeStroke: + this.closeStroke(); + break; + case OPS.closeFillStroke: + this.closeFillStroke(); + break; + case OPS.nextLine: + this.nextLine(); + break; + case OPS.transform: + this.transform(args[0], args[1], args[2], args[3], + args[4], args[5]); + break; + case OPS.constructPath: + this.constructPath(args[0], args[1]); + break; + case OPS.endPath: + this.endPath(); + break; + case 92: + this.group(opTree[x].items); + break; + default: + warn('Unimplemented method '+ fn); + break; + } } - var enabled = false; - try { - generateGL(); - enabled = !!currentGL; - } catch (e) { } - return shadow(this, 'isEnabled', enabled); }, - composeSMask: composeSMask, - drawFigures: drawFigures, - clear: cleanup - }; -})(); -exports.WebGLUtils = WebGLUtils; -})); + setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) { + this.current.wordSpacing = wordSpacing; + }, + setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) { + this.current.charSpacing = charSpacing; + }, -(function (root, factory) { - { - factory((root.pdfjsDisplayPatternHelper = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayWebGL); - } -}(this, function (exports, sharedUtil, displayWebGL) { + nextLine: function SVGGraphics_nextLine() { + this.moveText(0, this.current.leading); + }, -var Util = sharedUtil.Util; -var info = sharedUtil.info; -var isArray = sharedUtil.isArray; -var error = sharedUtil.error; -var WebGLUtils = displayWebGL.WebGLUtils; + setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) { + var current = this.current; + this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f]; -var ShadingIRs = {}; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; -ShadingIRs.RadialAxial = { - fromIR: function RadialAxial_fromIR(raw) { - var type = raw[1]; - var colorStops = raw[2]; - var p0 = raw[3]; - var p1 = raw[4]; - var r0 = raw[5]; - var r1 = raw[6]; - return { - type: 'Pattern', - getPattern: function RadialAxial_getPattern(ctx) { - var grad; - if (type === 'axial') { - grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); - } else if (type === 'radial') { - grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); - } + current.xcoords = []; + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - for (var i = 0, ii = colorStops.length; i < ii; ++i) { - var c = colorStops[i]; - grad.addColorStop(c[0], c[1]); - } - return grad; - } - }; - } -}; + current.txtElement = document.createElementNS(NS, 'svg:text'); + current.txtElement.appendChild(current.tspan); + }, -var createMeshCanvas = (function createMeshCanvasClosure() { - function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { - // Very basic Gouraud-shaded triangle rasterization algorithm. - var coords = context.coords, colors = context.colors; - var bytes = data.data, rowSize = data.width * 4; - var tmp; - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - if (coords[p2 + 1] > coords[p3 + 1]) { - tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; - } - if (coords[p1 + 1] > coords[p2 + 1]) { - tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; - } - var x1 = (coords[p1] + context.offsetX) * context.scaleX; - var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; - var x2 = (coords[p2] + context.offsetX) * context.scaleX; - var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; - var x3 = (coords[p3] + context.offsetX) * context.scaleX; - var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; - if (y1 >= y3) { - return; - } - var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; - var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; - var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; + beginText: function SVGGraphics_beginText() { + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + this.current.textMatrix = IDENTITY_MATRIX; + this.current.lineMatrix = IDENTITY_MATRIX; + this.current.tspan = document.createElementNS(NS, 'svg:tspan'); + this.current.txtElement = document.createElementNS(NS, 'svg:text'); + this.current.txtgrp = document.createElementNS(NS, 'svg:g'); + this.current.xcoords = []; + }, - var minY = Math.round(y1), maxY = Math.round(y3); - var xa, car, cag, cab; - var xb, cbr, cbg, cbb; - var k; - for (var y = minY; y <= maxY; y++) { - if (y < y2) { - k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); - xa = x1 - (x1 - x2) * k; - car = c1r - (c1r - c2r) * k; - cag = c1g - (c1g - c2g) * k; - cab = c1b - (c1b - c2b) * k; - } else { - k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); - xa = x2 - (x2 - x3) * k; - car = c2r - (c2r - c3r) * k; - cag = c2g - (c2g - c3g) * k; - cab = c2b - (c2b - c3b) * k; - } - k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); - xb = x1 - (x1 - x3) * k; - cbr = c1r - (c1r - c3r) * k; - cbg = c1g - (c1g - c3g) * k; - cbb = c1b - (c1b - c3b) * k; - var x1_ = Math.round(Math.min(xa, xb)); - var x2_ = Math.round(Math.max(xa, xb)); - var j = rowSize * y + x1_ * 4; - for (var x = x1_; x <= x2_; x++) { - k = (xa - x) / (xa - xb); - k = k < 0 ? 0 : k > 1 ? 1 : k; - bytes[j++] = (car - (car - cbr) * k) | 0; - bytes[j++] = (cag - (cag - cbg) * k) | 0; - bytes[j++] = (cab - (cab - cbb) * k) | 0; - bytes[j++] = 255; - } - } - } + moveText: function SVGGraphics_moveText(x, y) { + var current = this.current; + this.current.x = this.current.lineX += x; + this.current.y = this.current.lineY += y; - function drawFigure(data, figure, context) { - var ps = figure.coords; - var cs = figure.colors; - var i, ii; - switch (figure.type) { - case 'lattice': - var verticesPerRow = figure.verticesPerRow; - var rows = Math.floor(ps.length / verticesPerRow) - 1; - var cols = verticesPerRow - 1; - for (i = 0; i < rows; i++) { - var q = i * verticesPerRow; - for (var j = 0; j < cols; j++, q++) { - drawTriangle(data, context, - ps[q], ps[q + 1], ps[q + verticesPerRow], - cs[q], cs[q + 1], cs[q + verticesPerRow]); - drawTriangle(data, context, - ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], - cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); - } - } - break; - case 'triangles': - for (i = 0, ii = ps.length; i < ii; i += 3) { - drawTriangle(data, context, - ps[i], ps[i + 1], ps[i + 2], - cs[i], cs[i + 1], cs[i + 2]); - } - break; - default: - error('illigal figure'); - break; - } - } + current.xcoords = []; + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + }, - function createMeshCanvas(bounds, combinesScale, coords, colors, figures, - backgroundColor, cachedCanvases) { - // we will increase scale on some weird factor to let antialiasing take - // care of "rough" edges - var EXPECTED_SCALE = 1.1; - // MAX_PATTERN_SIZE is used to avoid OOM situation. - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough + showText: function SVGGraphics_showText(glyphs) { + var current = this.current; + var font = current.font; + var fontSize = current.fontSize; - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var boundsWidth = Math.ceil(bounds[2]) - offsetX; - var boundsHeight = Math.ceil(bounds[3]) - offsetY; + if (fontSize === 0) { + return; + } - var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * - EXPECTED_SCALE)), MAX_PATTERN_SIZE); - var scaleX = boundsWidth / width; - var scaleY = boundsHeight / height; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var fontDirection = current.fontDirection; + var textHScale = current.textHScale * fontDirection; + var glyphsLength = glyphs.length; + var vertical = font.vertical; + var widthAdvanceScale = fontSize * current.fontMatrix[0]; - var context = { - coords: coords, - colors: colors, - offsetX: -offsetX, - offsetY: -offsetY, - scaleX: 1 / scaleX, - scaleY: 1 / scaleY - }; + var x = 0, i; + for (i = 0; i < glyphsLength; ++i) { + var glyph = glyphs[i]; + if (glyph === null) { + // word break + x += fontDirection * wordSpacing; + continue; + } else if (isNum(glyph)) { + x += -glyph * fontSize * 0.001; + continue; + } + current.xcoords.push(current.x + x * textHScale); - var canvas, tmpCanvas, i, ii; - if (WebGLUtils.isEnabled) { - canvas = WebGLUtils.drawFigures(width, height, backgroundColor, - figures, context); + var width = glyph.width; + var character = glyph.fontChar; + var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; + x += charWidth; - // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 - tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); - tmpCanvas.context.drawImage(canvas, 0, 0); - canvas = tmpCanvas.canvas; - } else { - tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); - var tmpCtx = tmpCanvas.context; + current.tspan.textContent += character; + } + if (vertical) { + current.y -= x * textHScale; + } else { + current.x += x * textHScale; + } - var data = tmpCtx.createImageData(width, height); - if (backgroundColor) { - var bytes = data.data; - for (i = 0, ii = bytes.length; i < ii; i += 4) { - bytes[i] = backgroundColor[0]; - bytes[i + 1] = backgroundColor[1]; - bytes[i + 2] = backgroundColor[2]; - bytes[i + 3] = 255; - } + current.tspan.setAttributeNS(null, 'x', + current.xcoords.map(pf).join(' ')); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); + current.tspan.setAttributeNS(null, 'font-size', + pf(current.fontSize) + 'px'); + if (current.fontStyle !== SVG_DEFAULTS.fontStyle) { + current.tspan.setAttributeNS(null, 'font-style', current.fontStyle); } - for (i = 0; i < figures.length; i++) { - drawFigure(data, figures[i], context); + if (current.fontWeight !== SVG_DEFAULTS.fontWeight) { + current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight); + } + if (current.fillColor !== SVG_DEFAULTS.fillColor) { + current.tspan.setAttributeNS(null, 'fill', current.fillColor); } - tmpCtx.putImageData(data, 0, 0); - canvas = tmpCanvas.canvas; - } - return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, - scaleX: scaleX, scaleY: scaleY}; - } - return createMeshCanvas; -})(); + current.txtElement.setAttributeNS(null, 'transform', + pm(current.textMatrix) + + ' scale(1, -1)' ); + current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve'); + current.txtElement.appendChild(current.tspan); + current.txtgrp.appendChild(current.txtElement); -ShadingIRs.Mesh = { - fromIR: function Mesh_fromIR(raw) { - //var type = raw[1]; - var coords = raw[2]; - var colors = raw[3]; - var figures = raw[4]; - var bounds = raw[5]; - var matrix = raw[6]; - //var bbox = raw[7]; - var background = raw[8]; - return { - type: 'Pattern', - getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { - var scale; - if (shadingFill) { - scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform); - } else { - // Obtain scale from matrix and current transformation matrix. - scale = Util.singularValueDecompose2dScale(owner.baseTransform); - if (matrix) { - var matrixScale = Util.singularValueDecompose2dScale(matrix); - scale = [scale[0] * matrixScale[0], - scale[1] * matrixScale[1]]; - } - } - - - // Rasterizing on the main thread since sending/queue large canvases - // might cause OOM. - var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, - colors, figures, shadingFill ? null : background, - owner.cachedCanvases); - - if (!shadingFill) { - ctx.setTransform.apply(ctx, owner.baseTransform); - if (matrix) { - ctx.transform.apply(ctx, matrix); - } - } + this.tgrp.appendChild(current.txtElement); - ctx.translate(temporaryPatternCanvas.offsetX, - temporaryPatternCanvas.offsetY); - ctx.scale(temporaryPatternCanvas.scaleX, - temporaryPatternCanvas.scaleY); + }, - return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); - } - }; - } -}; + setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) { + this.setLeading(-y); + this.moveText(x, y); + }, -ShadingIRs.Dummy = { - fromIR: function Dummy_fromIR() { - return { - type: 'Pattern', - getPattern: function Dummy_fromIR_getPattern() { - return 'hotpink'; + addFontStyle: function SVGGraphics_addFontStyle(fontObj) { + if (!this.cssStyle) { + this.cssStyle = document.createElementNS(NS, 'svg:style'); + this.cssStyle.setAttributeNS(null, 'type', 'text/css'); + this.defs.appendChild(this.cssStyle); } - }; - } -}; - -function getShadingPatternFromIR(raw) { - var shadingIR = ShadingIRs[raw[0]]; - if (!shadingIR) { - error('Unknown IR type: ' + raw[0]); - } - return shadingIR.fromIR(raw); -} - -var TilingPattern = (function TilingPatternClosure() { - var PaintType = { - COLORED: 1, - UNCOLORED: 2 - }; - - var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - - function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) { - this.operatorList = IR[2]; - this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; - this.bbox = IR[4]; - this.xstep = IR[5]; - this.ystep = IR[6]; - this.paintType = IR[7]; - this.tilingType = IR[8]; - this.color = color; - this.canvasGraphicsFactory = canvasGraphicsFactory; - this.baseTransform = baseTransform; - this.type = 'Pattern'; - this.ctx = ctx; - } - - TilingPattern.prototype = { - createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { - var operatorList = this.operatorList; - var bbox = this.bbox; - var xstep = this.xstep; - var ystep = this.ystep; - var paintType = this.paintType; - var tilingType = this.tilingType; - var color = this.color; - var canvasGraphicsFactory = this.canvasGraphicsFactory; - - info('TilingType: ' + tilingType); - - var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; - - var topLeft = [x0, y0]; - // we want the canvas to be as large as the step size - var botRight = [x0 + xstep, y0 + ystep]; - - var width = botRight[0] - topLeft[0]; - var height = botRight[1] - topLeft[1]; - - // Obtain scale from matrix and current transformation matrix. - var matrixScale = Util.singularValueDecompose2dScale(this.matrix); - var curMatrixScale = Util.singularValueDecompose2dScale( - this.baseTransform); - var combinedScale = [matrixScale[0] * curMatrixScale[0], - matrixScale[1] * curMatrixScale[1]]; - - // MAX_PATTERN_SIZE is used to avoid OOM situation. - // Use width and height values that are as close as possible to the end - // result when the pattern is used. Too low value makes the pattern look - // blurry. Too large value makes it look too crispy. - width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), - MAX_PATTERN_SIZE); - height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), - MAX_PATTERN_SIZE); + var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype); + this.cssStyle.textContent += + '@font-face { font-family: "' + fontObj.loadedName + '";' + + ' src: url(' + url + '); }\n'; + }, - var tmpCanvas = owner.cachedCanvases.getCanvas('pattern', - width, height, true); - var tmpCtx = tmpCanvas.context; - var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx); - graphics.groupLevel = owner.groupLevel; + setFont: function SVGGraphics_setFont(details) { + var current = this.current; + var fontObj = this.commonObjs.get(details[0]); + var size = details[1]; + this.current.font = fontObj; - this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); + if (this.embedFonts && fontObj.data && + !this.embeddedFonts[fontObj.loadedName]) { + this.addFontStyle(fontObj); + this.embeddedFonts[fontObj.loadedName] = fontObj; + } - this.setScale(width, height, xstep, ystep); - this.transformToScale(graphics); + current.fontMatrix = (fontObj.fontMatrix ? + fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - // transform coordinates to pattern space - var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; - graphics.transform.apply(graphics, tmpTranslate); + var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); + var italic = fontObj.italic ? 'italic' : 'normal'; - this.clipBbox(graphics, bbox, x0, y0, x1, y1); + if (size < 0) { + size = -size; + current.fontDirection = -1; + } else { + current.fontDirection = 1; + } + current.fontSize = size; + current.fontFamily = fontObj.loadedName; + current.fontWeight = bold; + current.fontStyle = italic; - graphics.executeOperatorList(operatorList); - return tmpCanvas.canvas; + current.tspan = document.createElementNS(NS, 'svg:tspan'); + current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + current.xcoords = []; }, - setScale: function TilingPattern_setScale(width, height, xstep, ystep) { - this.scale = [width / xstep, height / ystep]; + endText: function SVGGraphics_endText() { + if (this.current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); + } + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); }, - transformToScale: function TilingPattern_transformToScale(graphics) { - var scale = this.scale; - var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; - graphics.transform.apply(graphics, tmpScale); + // Path properties + setLineWidth: function SVGGraphics_setLineWidth(width) { + this.current.lineWidth = width; }, - - scaleToContext: function TilingPattern_scaleToContext() { - var scale = this.scale; - this.ctx.scale(1 / scale[0], 1 / scale[1]); + setLineCap: function SVGGraphics_setLineCap(style) { + this.current.lineCap = LINE_CAP_STYLES[style]; }, - - clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { - if (bbox && isArray(bbox) && bbox.length === 4) { - var bboxWidth = x1 - x0; - var bboxHeight = y1 - y0; - graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight); - graphics.clip(); - graphics.endPath(); - } + setLineJoin: function SVGGraphics_setLineJoin(style) { + this.current.lineJoin = LINE_JOIN_STYLES[style]; + }, + setMiterLimit: function SVGGraphics_setMiterLimit(limit) { + this.current.miterLimit = limit; + }, + setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.current.strokeColor = color; + }, + setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.current.fillColor = color; + this.current.tspan = document.createElementNS(NS, 'svg:tspan'); + this.current.xcoords = []; + }, + setDash: function SVGGraphics_setDash(dashArray, dashPhase) { + this.current.dashArray = dashArray; + this.current.dashPhase = dashPhase; }, - setFillAndStrokeStyleToContext: - function setFillAndStrokeStyleToContext(context, paintType, color) { - switch (paintType) { - case PaintType.COLORED: - var ctx = this.ctx; - context.fillStyle = ctx.fillStyle; - context.strokeStyle = ctx.strokeStyle; - break; - case PaintType.UNCOLORED: - var cssColor = Util.makeCssRgb(color[0], color[1], color[2]); - context.fillStyle = cssColor; - context.strokeStyle = cssColor; - break; - default: - error('Unsupported paint type: ' + paintType); - } - }, + constructPath: function SVGGraphics_constructPath(ops, args) { + var current = this.current; + var x = current.x, y = current.y; + current.path = document.createElementNS(NS, 'svg:path'); + var d = []; + var opLength = ops.length; - getPattern: function TilingPattern_getPattern(ctx, owner) { - var temporaryPatternCanvas = this.createPatternCanvas(owner); - - ctx = this.ctx; - ctx.setTransform.apply(ctx, this.baseTransform); - ctx.transform.apply(ctx, this.matrix); - this.scaleToContext(); + for (var i = 0, j = 0; i < opLength; i++) { + switch (ops[i] | 0) { + case OPS.rectangle: + x = args[j++]; + y = args[j++]; + var width = args[j++]; + var height = args[j++]; + var xw = x + width; + var yh = y + height; + d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh), + 'L', pf(x), pf(yh), 'Z'); + break; + case OPS.moveTo: + x = args[j++]; + y = args[j++]; + d.push('M', pf(x), pf(y)); + break; + case OPS.lineTo: + x = args[j++]; + y = args[j++]; + d.push('L', pf(x) , pf(y)); + break; + case OPS.curveTo: + x = args[j + 4]; + y = args[j + 5]; + d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]), + pf(args[j + 3]), pf(x), pf(y)); + j += 6; + break; + case OPS.curveTo2: + x = args[j + 2]; + y = args[j + 3]; + d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]), + pf(args[j + 2]), pf(args[j + 3])); + j += 4; + break; + case OPS.curveTo3: + x = args[j + 2]; + y = args[j + 3]; + d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y), + pf(x), pf(y)); + j += 4; + break; + case OPS.closePath: + d.push('Z'); + break; + } + } + current.path.setAttributeNS(null, 'd', d.join(' ')); + current.path.setAttributeNS(null, 'stroke-miterlimit', + pf(current.miterLimit)); + current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap); + current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin); + current.path.setAttributeNS(null, 'stroke-width', + pf(current.lineWidth) + 'px'); + current.path.setAttributeNS(null, 'stroke-dasharray', + current.dashArray.map(pf).join(' ')); + current.path.setAttributeNS(null, 'stroke-dashoffset', + pf(current.dashPhase) + 'px'); + current.path.setAttributeNS(null, 'fill', 'none'); - return ctx.createPattern(temporaryPatternCanvas, 'repeat'); - } - }; + this.tgrp.appendChild(current.path); + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); + } + // Saving a reference in current.element so that it can be addressed + // in 'fill' and 'stroke' + current.element = current.path; + current.setCurrentPoint(x, y); + }, - return TilingPattern; -})(); + endPath: function SVGGraphics_endPath() { + var current = this.current; + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); + } + this.tgrp = document.createElementNS(NS, 'svg:g'); + this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + }, -exports.getShadingPatternFromIR = getShadingPatternFromIR; -exports.TilingPattern = TilingPattern; -})); + clip: function SVGGraphics_clip(type) { + var current = this.current; + // Add current path to clipping path + current.clipId = 'clippath' + clipCount; + clipCount++; + this.clippath = document.createElementNS(NS, 'svg:clipPath'); + this.clippath.setAttributeNS(null, 'id', current.clipId); + var clipElement = current.element.cloneNode(); + if (type === 'evenodd') { + clipElement.setAttributeNS(null, 'clip-rule', 'evenodd'); + } else { + clipElement.setAttributeNS(null, 'clip-rule', 'nonzero'); + } + this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + this.clippath.appendChild(clipElement); + this.defs.appendChild(this.clippath); + // Create a new group with that attribute + current.pendingClip = true; + this.cgrp = document.createElementNS(NS, 'svg:g'); + this.cgrp.setAttributeNS(null, 'clip-path', + 'url(#' + current.clipId + ')'); + this.pgrp.appendChild(this.cgrp); + }, -(function (root, factory) { - { - factory((root.pdfjsDisplayCanvas = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL); - } -}(this, function (exports, sharedUtil, displayPatternHelper, displayWebGL) { + closePath: function SVGGraphics_closePath() { + var current = this.current; + var d = current.path.getAttributeNS(null, 'd'); + d += 'Z'; + current.path.setAttributeNS(null, 'd', d); + }, -var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; -var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; -var ImageKind = sharedUtil.ImageKind; -var OPS = sharedUtil.OPS; -var TextRenderingMode = sharedUtil.TextRenderingMode; -var Uint32ArrayView = sharedUtil.Uint32ArrayView; -var Util = sharedUtil.Util; -var assert = sharedUtil.assert; -var info = sharedUtil.info; -var isNum = sharedUtil.isNum; -var isArray = sharedUtil.isArray; -var error = sharedUtil.error; -var shadow = sharedUtil.shadow; -var warn = sharedUtil.warn; -var TilingPattern = displayPatternHelper.TilingPattern; -var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR; -var WebGLUtils = displayWebGL.WebGLUtils; + setLeading: function SVGGraphics_setLeading(leading) { + this.current.leading = -leading; + }, -// contexts store most of the state we need natively. -// However, PDF needs a bit more state, which we store here. + setTextRise: function SVGGraphics_setTextRise(textRise) { + this.current.textRise = textRise; + }, -// Minimal font size that would be used during canvas fillText operations. -var MIN_FONT_SIZE = 16; -// Maximum font size that would be used during canvas fillText operations. -var MAX_FONT_SIZE = 100; -var MAX_GROUP_SIZE = 4096; + setHScale: function SVGGraphics_setHScale(scale) { + this.current.textHScale = scale / 100; + }, -// Heuristic value used when enforcing minimum line widths. -var MIN_WIDTH_FACTOR = 0.65; + setGState: function SVGGraphics_setGState(states) { + for (var i = 0, ii = states.length; i < ii; i++) { + var state = states[i]; + var key = state[0]; + var value = state[1]; -var COMPILE_TYPE3_GLYPHS = true; -var MAX_SIZE_TO_COMPILE = 1000; + switch (key) { + case 'LW': + this.setLineWidth(value); + break; + case 'LC': + this.setLineCap(value); + break; + case 'LJ': + this.setLineJoin(value); + break; + case 'ML': + this.setMiterLimit(value); + break; + case 'D': + this.setDash(value[0], value[1]); + break; + case 'RI': + break; + case 'FL': + break; + case 'Font': + this.setFont(value); + break; + case 'CA': + break; + case 'ca': + break; + case 'BM': + break; + case 'SMask': + break; + } + } + }, -var FULL_CHUNK_HEIGHT = 16; + fill: function SVGGraphics_fill() { + var current = this.current; + current.element.setAttributeNS(null, 'fill', current.fillColor); + }, -function createScratchCanvas(width, height) { - var canvas = document.createElement('canvas'); - canvas.width = width; - canvas.height = height; - return canvas; -} + stroke: function SVGGraphics_stroke() { + var current = this.current; + current.element.setAttributeNS(null, 'stroke', current.strokeColor); + current.element.setAttributeNS(null, 'fill', 'none'); + }, -function addContextCurrentTransform(ctx) { - // If the context doesn't expose a `mozCurrentTransform`, add a JS based one. - if (!ctx.mozCurrentTransform) { - ctx._originalSave = ctx.save; - ctx._originalRestore = ctx.restore; - ctx._originalRotate = ctx.rotate; - ctx._originalScale = ctx.scale; - ctx._originalTranslate = ctx.translate; - ctx._originalTransform = ctx.transform; - ctx._originalSetTransform = ctx.setTransform; + eoFill: function SVGGraphics_eoFill() { + var current = this.current; + current.element.setAttributeNS(null, 'fill', current.fillColor); + current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); + }, - ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0]; - ctx._transformStack = []; + fillStroke: function SVGGraphics_fillStroke() { + // Order is important since stroke wants fill to be none. + // First stroke, then if fill needed, it will be overwritten. + this.stroke(); + this.fill(); + }, - Object.defineProperty(ctx, 'mozCurrentTransform', { - get: function getCurrentTransform() { - return this._transformMatrix; - } - }); + eoFillStroke: function SVGGraphics_eoFillStroke() { + this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); + this.fillStroke(); + }, - Object.defineProperty(ctx, 'mozCurrentTransformInverse', { - get: function getCurrentTransformInverse() { - // Calculation done using WolframAlpha: - // http://www.wolframalpha.com/input/? - // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - - var m = this._transformMatrix; - var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; - - var ad_bc = a * d - b * c; - var bc_ad = b * c - a * d; + closeStroke: function SVGGraphics_closeStroke() { + this.closePath(); + this.stroke(); + }, - return [ - d / ad_bc, - b / bc_ad, - c / bc_ad, - a / ad_bc, - (d * e - c * f) / bc_ad, - (b * e - a * f) / ad_bc - ]; - } - }); + closeFillStroke: function SVGGraphics_closeFillStroke() { + this.closePath(); + this.fillStroke(); + }, - ctx.save = function ctxSave() { - var old = this._transformMatrix; - this._transformStack.push(old); - this._transformMatrix = old.slice(0, 6); + paintSolidColorImageMask: + function SVGGraphics_paintSolidColorImageMask() { + var current = this.current; + var rect = document.createElementNS(NS, 'svg:rect'); + rect.setAttributeNS(null, 'x', '0'); + rect.setAttributeNS(null, 'y', '0'); + rect.setAttributeNS(null, 'width', '1px'); + rect.setAttributeNS(null, 'height', '1px'); + rect.setAttributeNS(null, 'fill', current.fillColor); + this.tgrp.appendChild(rect); + }, - this._originalSave(); - }; + paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) { + var current = this.current; + var imgObj = this.objs.get(objId); + var imgEl = document.createElementNS(NS, 'svg:image'); + imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src); + imgEl.setAttributeNS(null, 'width', imgObj.width + 'px'); + imgEl.setAttributeNS(null, 'height', imgObj.height + 'px'); + imgEl.setAttributeNS(null, 'x', '0'); + imgEl.setAttributeNS(null, 'y', pf(-h)); + imgEl.setAttributeNS(null, 'transform', + 'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')'); - ctx.restore = function ctxRestore() { - var prev = this._transformStack.pop(); - if (prev) { - this._transformMatrix = prev; - this._originalRestore(); + this.tgrp.appendChild(imgEl); + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); } - }; - - ctx.translate = function ctxTranslate(x, y) { - var m = this._transformMatrix; - m[4] = m[0] * x + m[2] * y + m[4]; - m[5] = m[1] * x + m[3] * y + m[5]; + }, - this._originalTranslate(x, y); - }; + paintImageXObject: function SVGGraphics_paintImageXObject(objId) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; + } + this.paintInlineImageXObject(imgData); + }, - ctx.scale = function ctxScale(x, y) { - var m = this._transformMatrix; - m[0] = m[0] * x; - m[1] = m[1] * x; - m[2] = m[2] * y; - m[3] = m[3] * y; + paintInlineImageXObject: + function SVGGraphics_paintInlineImageXObject(imgData, mask) { + var current = this.current; + var width = imgData.width; + var height = imgData.height; - this._originalScale(x, y); - }; + var imgSrc = convertImgDataToPng(imgData); + var cliprect = document.createElementNS(NS, 'svg:rect'); + cliprect.setAttributeNS(null, 'x', '0'); + cliprect.setAttributeNS(null, 'y', '0'); + cliprect.setAttributeNS(null, 'width', pf(width)); + cliprect.setAttributeNS(null, 'height', pf(height)); + current.element = cliprect; + this.clip('nonzero'); + var imgEl = document.createElementNS(NS, 'svg:image'); + imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc); + imgEl.setAttributeNS(null, 'x', '0'); + imgEl.setAttributeNS(null, 'y', pf(-height)); + imgEl.setAttributeNS(null, 'width', pf(width) + 'px'); + imgEl.setAttributeNS(null, 'height', pf(height) + 'px'); + imgEl.setAttributeNS(null, 'transform', + 'scale(' + pf(1 / width) + ' ' + + pf(-1 / height) + ')'); + if (mask) { + mask.appendChild(imgEl); + } else { + this.tgrp.appendChild(imgEl); + } + if (current.pendingClip) { + this.cgrp.appendChild(this.tgrp); + this.pgrp.appendChild(this.cgrp); + } else { + this.pgrp.appendChild(this.tgrp); + } + }, - ctx.transform = function ctxTransform(a, b, c, d, e, f) { - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * a + m[2] * b, - m[1] * a + m[3] * b, - m[0] * c + m[2] * d, - m[1] * c + m[3] * d, - m[0] * e + m[2] * f + m[4], - m[1] * e + m[3] * f + m[5] - ]; + paintImageMaskXObject: + function SVGGraphics_paintImageMaskXObject(imgData) { + var current = this.current; + var width = imgData.width; + var height = imgData.height; + var fillColor = current.fillColor; - ctx._originalTransform(a, b, c, d, e, f); - }; + current.maskId = 'mask' + maskCount++; + var mask = document.createElementNS(NS, 'svg:mask'); + mask.setAttributeNS(null, 'id', current.maskId); - ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { - this._transformMatrix = [a, b, c, d, e, f]; + var rect = document.createElementNS(NS, 'svg:rect'); + rect.setAttributeNS(null, 'x', '0'); + rect.setAttributeNS(null, 'y', '0'); + rect.setAttributeNS(null, 'width', pf(width)); + rect.setAttributeNS(null, 'height', pf(height)); + rect.setAttributeNS(null, 'fill', fillColor); + rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')'); + this.defs.appendChild(mask); + this.tgrp.appendChild(rect); - ctx._originalSetTransform(a, b, c, d, e, f); - }; + this.paintInlineImageXObject(imgData, mask); + }, - ctx.rotate = function ctxRotate(angle) { - var cosValue = Math.cos(angle); - var sinValue = Math.sin(angle); + paintFormXObjectBegin: + function SVGGraphics_paintFormXObjectBegin(matrix, bbox) { + this.save(); - var m = this._transformMatrix; - this._transformMatrix = [ - m[0] * cosValue + m[2] * sinValue, - m[1] * cosValue + m[3] * sinValue, - m[0] * (-sinValue) + m[2] * cosValue, - m[1] * (-sinValue) + m[3] * cosValue, - m[4], - m[5] - ]; + if (isArray(matrix) && matrix.length === 6) { + this.transform(matrix[0], matrix[1], matrix[2], + matrix[3], matrix[4], matrix[5]); + } - this._originalRotate(angle); - }; - } -} + if (isArray(bbox) && bbox.length === 4) { + var width = bbox[2] - bbox[0]; + var height = bbox[3] - bbox[1]; -var CachedCanvases = (function CachedCanvasesClosure() { - function CachedCanvases() { - this.cache = Object.create(null); - } - CachedCanvases.prototype = { - getCanvas: function CachedCanvases_getCanvas(id, width, height, - trackTransform) { - var canvasEntry; - if (this.cache[id] !== undefined) { - canvasEntry = this.cache[id]; - canvasEntry.canvas.width = width; - canvasEntry.canvas.height = height; - // reset canvas transform for emulated mozCurrentTransform, if needed - canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); - } else { - var canvas = createScratchCanvas(width, height); - var ctx = canvas.getContext('2d'); - if (trackTransform) { - addContextCurrentTransform(ctx); - } - this.cache[id] = canvasEntry = {canvas: canvas, context: ctx}; + var cliprect = document.createElementNS(NS, 'svg:rect'); + cliprect.setAttributeNS(null, 'x', bbox[0]); + cliprect.setAttributeNS(null, 'y', bbox[1]); + cliprect.setAttributeNS(null, 'width', pf(width)); + cliprect.setAttributeNS(null, 'height', pf(height)); + this.current.element = cliprect; + this.clip('nonzero'); + this.endPath(); } - return canvasEntry; }, - clear: function () { - for (var id in this.cache) { - var canvasEntry = this.cache[id]; - // Zeroing the width and height causes Firefox to release graphics - // resources immediately, which can greatly reduce memory consumption. - canvasEntry.canvas.width = 0; - canvasEntry.canvas.height = 0; - delete this.cache[id]; - } + + paintFormXObjectEnd: + function SVGGraphics_paintFormXObjectEnd() { + this.restore(); } }; - return CachedCanvases; + return SVGGraphics; })(); -function compileType3Glyph(imgData) { - var POINT_TO_PROCESS_LIMIT = 1000; +PDFJS.SVGGraphics = SVGGraphics; - var width = imgData.width, height = imgData.height; - var i, j, j0, width1 = width + 1; - var points = new Uint8Array(width1 * (height + 1)); - var POINT_TYPES = - new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); +exports.SVGGraphics = SVGGraphics; +})); - // decodes bit-packed mask data - var lineSize = (width + 7) & ~7, data0 = imgData.data; - var data = new Uint8Array(lineSize * height), pos = 0, ii; - for (i = 0, ii = data0.length; i < ii; i++) { - var mask = 128, elem = data0[i]; - while (mask > 0) { - data[pos++] = (elem & mask) ? 0 : 255; - mask >>= 1; - } + +(function (root, factory) { + { + factory((root.pdfjsDisplayTextLayer = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayDOMUtils, root.pdfjsSharedGlobal); } +}(this, function (exports, sharedUtil, displayDOMUtils, sharedGlobal) { - // finding iteresting points: every point is located between mask pixels, - // so there will be points of the (width + 1)x(height + 1) grid. Every point - // will have flags assigned based on neighboring mask pixels: - // 4 | 8 - // --P-- - // 2 | 1 - // We are interested only in points with the flags: - // - outside corners: 1, 2, 4, 8; - // - inside corners: 7, 11, 13, 14; - // - and, intersections: 5, 10. - var count = 0; - pos = 0; - if (data[pos] !== 0) { - points[0] = 1; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j] = data[pos] ? 2 : 1; - ++count; - } - pos++; - } - if (data[pos] !== 0) { - points[j] = 2; - ++count; +var Util = sharedUtil.Util; +var createPromiseCapability = sharedUtil.createPromiseCapability; +var CustomStyle = displayDOMUtils.CustomStyle; +var PDFJS = sharedGlobal.PDFJS; + +/** + * Text layer render parameters. + * + * @typedef {Object} TextLayerRenderParameters + * @property {TextContent} textContent - Text content to render (the object is + * returned by the page's getTextContent() method). + * @property {HTMLElement} container - HTML element that will contain text runs. + * @property {PDFJS.PageViewport} viewport - The target viewport to properly + * layout the text runs. + * @property {Array} textDivs - (optional) HTML elements that are correspond + * the text items of the textContent input. This is output and shall be + * initially be set to empty array. + * @property {number} timeout - (optional) Delay in milliseconds before + * rendering of the text runs occurs. + */ +var renderTextLayer = (function renderTextLayerClosure() { + var MAX_TEXT_DIVS_TO_RENDER = 100000; + + var NonWhitespaceRegexp = /\S/; + + function isAllWhitespace(str) { + return !NonWhitespaceRegexp.test(str); } - for (i = 1; i < height; i++) { - pos = i * lineSize; - j0 = i * width1; - if (data[pos - lineSize] !== data[pos]) { - points[j0] = data[pos] ? 1 : 8; - ++count; + + function appendText(textDivs, viewport, geom, styles) { + var style = styles[geom.fontName]; + var textDiv = document.createElement('div'); + textDivs.push(textDiv); + if (isAllWhitespace(geom.str)) { + textDiv.dataset.isWhitespace = true; + return; } - // 'sum' is the position of the current pixel configuration in the 'TYPES' - // array (in order 8-1-2-4, so we can use '>>2' to shift the column). - var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); - for (j = 1; j < width; j++) { - sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + - (data[pos - lineSize + 1] ? 8 : 0); - if (POINT_TYPES[sum]) { - points[j0 + j] = POINT_TYPES[sum]; - ++count; - } - pos++; + var tx = Util.transform(viewport.transform, geom.transform); + var angle = Math.atan2(tx[1], tx[0]); + if (style.vertical) { + angle += Math.PI / 2; } - if (data[pos - lineSize] !== data[pos]) { - points[j0 + j] = data[pos] ? 2 : 4; - ++count; + var fontHeight = Math.sqrt((tx[2] * tx[2]) + (tx[3] * tx[3])); + var fontAscent = fontHeight; + if (style.ascent) { + fontAscent = style.ascent * fontAscent; + } else if (style.descent) { + fontAscent = (1 + style.descent) * fontAscent; } - if (count > POINT_TO_PROCESS_LIMIT) { - return null; + var left; + var top; + if (angle === 0) { + left = tx[4]; + top = tx[5] - fontAscent; + } else { + left = tx[4] + (fontAscent * Math.sin(angle)); + top = tx[5] - (fontAscent * Math.cos(angle)); } - } + textDiv.style.left = left + 'px'; + textDiv.style.top = top + 'px'; + textDiv.style.fontSize = fontHeight + 'px'; + textDiv.style.fontFamily = style.fontFamily; - pos = lineSize * (height - 1); - j0 = i * width1; - if (data[pos] !== 0) { - points[j0] = 8; - ++count; - } - for (j = 1; j < width; j++) { - if (data[pos] !== data[pos + 1]) { - points[j0 + j] = data[pos] ? 4 : 8; - ++count; + textDiv.textContent = geom.str; + // |fontName| is only used by the Font Inspector. This test will succeed + // when e.g. the Font Inspector is off but the Stepper is on, but it's + // not worth the effort to do a more accurate test. + if (PDFJS.pdfBug) { + textDiv.dataset.fontName = geom.fontName; + } + // Storing into dataset will convert number into string. + if (angle !== 0) { + textDiv.dataset.angle = angle * (180 / Math.PI); + } + // We don't bother scaling single-char text divs, because it has very + // little effect on text highlighting. This makes scrolling on docs with + // lots of such divs a lot faster. + if (geom.str.length > 1) { + if (style.vertical) { + textDiv.dataset.canvasWidth = geom.height * viewport.scale; + } else { + textDiv.dataset.canvasWidth = geom.width * viewport.scale; + } } - pos++; - } - if (data[pos] !== 0) { - points[j0 + j] = 4; - ++count; - } - if (count > POINT_TO_PROCESS_LIMIT) { - return null; } - // building outlines - var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); - var outlines = []; - for (i = 0; count && i <= height; i++) { - var p = i * width1; - var end = p + width; - while (p < end && !points[p]) { - p++; + function render(task) { + if (task._canceled) { + return; } - if (p === end) { - continue; + var textLayerFrag = task._container; + var textDivs = task._textDivs; + var capability = task._capability; + var textDivsLength = textDivs.length; + + // No point in rendering many divs as it would make the browser + // unusable even after the divs are rendered. + if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) { + capability.resolve(); + return; } - var coords = [p % width1, i]; - var type = points[p], p0 = p, pp; - do { - var step = steps[type]; - do { - p += step; - } while (!points[p]); + var canvas = document.createElement('canvas'); + canvas.mozOpaque = true; + var ctx = canvas.getContext('2d', {alpha: false}); - pp = points[p]; - if (pp !== 5 && pp !== 10) { - // set new direction - type = pp; - // delete mark - points[p] = 0; - } else { // type is 5 or 10, ie, a crossing - // set new direction - type = pp & ((0x33 * type) >> 4); - // set new type for "future hit" - points[p] &= (type >> 2 | type << 2); + var lastFontSize; + var lastFontFamily; + for (var i = 0; i < textDivsLength; i++) { + var textDiv = textDivs[i]; + if (textDiv.dataset.isWhitespace !== undefined) { + continue; } - coords.push(p % width1); - coords.push((p / width1) | 0); - --count; - } while (p0 !== p); - outlines.push(coords); - --i; - } + var fontSize = textDiv.style.fontSize; + var fontFamily = textDiv.style.fontFamily; - var drawOutline = function(c) { - c.save(); - // the path shall be painted in [0..1]x[0..1] space - c.scale(1 / width, -1 / height); - c.translate(0, -height); - c.beginPath(); - for (var i = 0, ii = outlines.length; i < ii; i++) { - var o = outlines[i]; - c.moveTo(o[0], o[1]); - for (var j = 2, jj = o.length; j < jj; j += 2) { - c.lineTo(o[j], o[j+1]); + // Only build font string and set to context if different from last. + if (fontSize !== lastFontSize || fontFamily !== lastFontFamily) { + ctx.font = fontSize + ' ' + fontFamily; + lastFontSize = fontSize; + lastFontFamily = fontFamily; } - } - c.fill(); - c.beginPath(); - c.restore(); - }; - return drawOutline; -} + var width = ctx.measureText(textDiv.textContent).width; + if (width > 0) { + textLayerFrag.appendChild(textDiv); + var transform; + if (textDiv.dataset.canvasWidth !== undefined) { + // Dataset values come of type string. + var textScale = textDiv.dataset.canvasWidth / width; + transform = 'scaleX(' + textScale + ')'; + } else { + transform = ''; + } + var rotation = textDiv.dataset.angle; + if (rotation) { + transform = 'rotate(' + rotation + 'deg) ' + transform; + } + if (transform) { + CustomStyle.setProp('transform' , textDiv, transform); + } + } + } + capability.resolve(); + } -var CanvasExtraState = (function CanvasExtraStateClosure() { - function CanvasExtraState(old) { - // Are soft masks and alpha values shapes or opacities? - this.alphaIsShape = false; - this.fontSize = 0; - this.fontSizeScale = 1; - this.textMatrix = IDENTITY_MATRIX; - this.textMatrixScale = 1; - this.fontMatrix = FONT_IDENTITY_MATRIX; - this.leading = 0; - // Current point (in user coordinates) - this.x = 0; - this.y = 0; - // Start of text line (in text coordinates) - this.lineX = 0; - this.lineY = 0; - // Character and word spacing - this.charSpacing = 0; - this.wordSpacing = 0; - this.textHScale = 1; - this.textRenderingMode = TextRenderingMode.FILL; - this.textRise = 0; - // Default fore and background colors - this.fillColor = '#000000'; - this.strokeColor = '#000000'; - this.patternFill = false; - // Note: fill alpha applies to all non-stroking operations - this.fillAlpha = 1; - this.strokeAlpha = 1; - this.lineWidth = 1; - this.activeSMask = null; // nonclonable field (see the save method below) - - this.old = old; + /** + * Text layer rendering task. + * + * @param {TextContent} textContent + * @param {HTMLElement} container + * @param {PDFJS.PageViewport} viewport + * @param {Array} textDivs + * @private + */ + function TextLayerRenderTask(textContent, container, viewport, textDivs) { + this._textContent = textContent; + this._container = container; + this._viewport = viewport; + textDivs = textDivs || []; + this._textDivs = textDivs; + this._canceled = false; + this._capability = createPromiseCapability(); + this._renderTimer = null; } + TextLayerRenderTask.prototype = { + get promise() { + return this._capability.promise; + }, - CanvasExtraState.prototype = { - clone: function CanvasExtraState_clone() { - return Object.create(this); + cancel: function TextLayer_cancel() { + this._canceled = true; + if (this._renderTimer !== null) { + clearTimeout(this._renderTimer); + this._renderTimer = null; + } + this._capability.reject('canceled'); }, - setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { - this.x = x; - this.y = y; + + _render: function TextLayer_render(timeout) { + var textItems = this._textContent.items; + var styles = this._textContent.styles; + var textDivs = this._textDivs; + var viewport = this._viewport; + for (var i = 0, len = textItems.length; i < len; i++) { + appendText(textDivs, viewport, textItems[i], styles); + } + + if (!timeout) { // Render right away + render(this); + } else { // Schedule + var self = this; + this._renderTimer = setTimeout(function() { + render(self); + self._renderTimer = null; + }, timeout); + } } }; - return CanvasExtraState; -})(); -var CanvasGraphics = (function CanvasGraphicsClosure() { - // Defines the time the executeOperatorList is going to be executing - // before it stops and shedules a continue of execution. - var EXECUTION_TIME = 15; - // Defines the number of steps before checking the execution time - var EXECUTION_STEPS = 10; - function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { - this.ctx = canvasCtx; - this.current = new CanvasExtraState(); - this.stateStack = []; - this.pendingClip = null; - this.pendingEOFill = false; - this.res = null; - this.xobjs = null; - this.commonObjs = commonObjs; - this.objs = objs; - this.imageLayer = imageLayer; - this.groupStack = []; - this.processingType3 = null; - // Patterns are painted relative to the initial page/form transform, see pdf - // spec 8.7.2 NOTE 1. - this.baseTransform = null; - this.baseTransformStack = []; - this.groupLevel = 0; - this.smaskStack = []; - this.smaskCounter = 0; - this.tempSMask = null; - this.cachedCanvases = new CachedCanvases(); - if (canvasCtx) { - // NOTE: if mozCurrentTransform is polyfilled, then the current state of - // the transformation must already be set in canvasCtx._transformMatrix. - addContextCurrentTransform(canvasCtx); - } - this.cachedGetSinglePixelWidth = null; + /** + * Starts rendering of the text layer. + * + * @param {TextLayerRenderParameters} renderParameters + * @returns {TextLayerRenderTask} + */ + function renderTextLayer(renderParameters) { + var task = new TextLayerRenderTask(renderParameters.textContent, + renderParameters.container, + renderParameters.viewport, + renderParameters.textDivs); + task._render(renderParameters.timeout); + return task; } - function putBinaryImageData(ctx, imgData) { - if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { - ctx.putImageData(imgData, 0, 0); - return; - } + return renderTextLayer; +})(); - // Put the image data to the canvas in chunks, rather than putting the - // whole image at once. This saves JS memory, because the ImageData object - // is smaller. It also possibly saves C++ memory within the implementation - // of putImageData(). (E.g. in Firefox we make two short-lived copies of - // the data passed to putImageData()). |n| shouldn't be too small, however, - // because too many putImageData() calls will slow things down. - // - // Note: as written, if the last chunk is partial, the putImageData() call - // will (conceptually) put pixels past the bounds of the canvas. But - // that's ok; any such pixels are ignored. +PDFJS.renderTextLayer = renderTextLayer; - var height = imgData.height, width = imgData.width; - var partialChunkHeight = height % FULL_CHUNK_HEIGHT; - var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; - var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; +exports.renderTextLayer = renderTextLayer; +})); - var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); - var srcPos = 0, destPos; - var src = imgData.data; - var dest = chunkImgData.data; - var i, j, thisChunkHeight, elemsInThisChunk; - // There are multiple forms in which the pixel data can be passed, and - // imgData.kind tells us which one this is. - if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { - // Grayscale, 1 bit per pixel (i.e. black-and-white). - var srcLength = src.byteLength; - var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : - new Uint32ArrayView(dest); - var dest32DataLength = dest32.length; - var fullSrcDiff = (width + 7) >> 3; - var white = 0xFFFFFFFF; - var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? - 0xFF000000 : 0x000000FF; - for (i = 0; i < totalChunks; i++) { - thisChunkHeight = - (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; - destPos = 0; - for (j = 0; j < thisChunkHeight; j++) { - var srcDiff = srcLength - srcPos; - var k = 0; - var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; - var kEndUnrolled = kEnd & ~7; - var mask = 0; - var srcByte = 0; - for (; k < kEndUnrolled; k += 8) { - srcByte = src[srcPos++]; - dest32[destPos++] = (srcByte & 128) ? white : black; - dest32[destPos++] = (srcByte & 64) ? white : black; - dest32[destPos++] = (srcByte & 32) ? white : black; - dest32[destPos++] = (srcByte & 16) ? white : black; - dest32[destPos++] = (srcByte & 8) ? white : black; - dest32[destPos++] = (srcByte & 4) ? white : black; - dest32[destPos++] = (srcByte & 2) ? white : black; - dest32[destPos++] = (srcByte & 1) ? white : black; - } - for (; k < kEnd; k++) { - if (mask === 0) { - srcByte = src[srcPos++]; - mask = 128; - } +(function (root, factory) { + { + factory((root.pdfjsDisplayWebGL = {}), root.pdfjsSharedUtil); + } +}(this, function (exports, sharedUtil) { - dest32[destPos++] = (srcByte & mask) ? white : black; - mask >>= 1; - } - } - // We ran out of input. Make all remaining pixels transparent. - while (destPos < dest32DataLength) { - dest32[destPos++] = 0; - } +var shadow = sharedUtil.shadow; - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } else if (imgData.kind === ImageKind.RGBA_32BPP) { - // RGBA, 32-bits per pixel. +var WebGLUtils = (function WebGLUtilsClosure() { + function loadShader(gl, code, shaderType) { + var shader = gl.createShader(shaderType); + gl.shaderSource(shader, code); + gl.compileShader(shader); + var compiled = gl.getShaderParameter(shader, gl.COMPILE_STATUS); + if (!compiled) { + var errorMsg = gl.getShaderInfoLog(shader); + throw new Error('Error during shader compilation: ' + errorMsg); + } + return shader; + } + function createVertexShader(gl, code) { + return loadShader(gl, code, gl.VERTEX_SHADER); + } + function createFragmentShader(gl, code) { + return loadShader(gl, code, gl.FRAGMENT_SHADER); + } + function createProgram(gl, shaders) { + var program = gl.createProgram(); + for (var i = 0, ii = shaders.length; i < ii; ++i) { + gl.attachShader(program, shaders[i]); + } + gl.linkProgram(program); + var linked = gl.getProgramParameter(program, gl.LINK_STATUS); + if (!linked) { + var errorMsg = gl.getProgramInfoLog(program); + throw new Error('Error during program linking: ' + errorMsg); + } + return program; + } + function createTexture(gl, image, textureId) { + gl.activeTexture(textureId); + var texture = gl.createTexture(); + gl.bindTexture(gl.TEXTURE_2D, texture); - j = 0; - elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4; - for (i = 0; i < fullChunks; i++) { - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - srcPos += elemsInThisChunk; + // Set the parameters so we can render any size image. + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.NEAREST); + gl.texParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.NEAREST); - ctx.putImageData(chunkImgData, 0, j); - j += FULL_CHUNK_HEIGHT; - } - if (i < totalChunks) { - elemsInThisChunk = width * partialChunkHeight * 4; - dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); - ctx.putImageData(chunkImgData, 0, j); - } - - } else if (imgData.kind === ImageKind.RGB_24BPP) { - // RGB, 24-bits per pixel. - thisChunkHeight = FULL_CHUNK_HEIGHT; - elemsInThisChunk = width * thisChunkHeight; - for (i = 0; i < totalChunks; i++) { - if (i >= fullChunks) { - thisChunkHeight = partialChunkHeight; - elemsInThisChunk = width * thisChunkHeight; - } + // Upload the image into the texture. + gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); + return texture; + } - destPos = 0; - for (j = elemsInThisChunk; j--;) { - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = src[srcPos++]; - dest[destPos++] = 255; - } - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } else { - error('bad image kind: ' + imgData.kind); + var currentGL, currentCanvas; + function generateGL() { + if (currentGL) { + return; } + currentCanvas = document.createElement('canvas'); + currentGL = currentCanvas.getContext('webgl', + { premultipliedalpha: false }); } - function putBinaryImageMask(ctx, imgData) { - var height = imgData.height, width = imgData.width; - var partialChunkHeight = height % FULL_CHUNK_HEIGHT; - var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; - var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; + var smaskVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec2 a_texCoord; \ + \ + uniform vec2 u_resolution; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec2 clipSpace = (a_position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_texCoord = a_texCoord; \ + } '; - var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); - var srcPos = 0; - var src = imgData.data; - var dest = chunkImgData.data; + var smaskFragmentShaderCode = '\ + precision mediump float; \ + \ + uniform vec4 u_backdrop; \ + uniform int u_subtype; \ + uniform sampler2D u_image; \ + uniform sampler2D u_mask; \ + \ + varying vec2 v_texCoord; \ + \ + void main() { \ + vec4 imageColor = texture2D(u_image, v_texCoord); \ + vec4 maskColor = texture2D(u_mask, v_texCoord); \ + if (u_backdrop.a > 0.0) { \ + maskColor.rgb = maskColor.rgb * maskColor.a + \ + u_backdrop.rgb * (1.0 - maskColor.a); \ + } \ + float lum; \ + if (u_subtype == 0) { \ + lum = maskColor.a; \ + } else { \ + lum = maskColor.r * 0.3 + maskColor.g * 0.59 + \ + maskColor.b * 0.11; \ + } \ + imageColor.a *= lum; \ + imageColor.rgb *= imageColor.a; \ + gl_FragColor = imageColor; \ + } '; - for (var i = 0; i < totalChunks; i++) { - var thisChunkHeight = - (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; + var smaskCache = null; - // Expand the mask so it can be used by the canvas. Any required - // inversion has already been handled. - var destPos = 3; // alpha component offset - for (var j = 0; j < thisChunkHeight; j++) { - var mask = 0; - for (var k = 0; k < width; k++) { - if (!mask) { - var elem = src[srcPos++]; - mask = 128; - } - dest[destPos] = (elem & mask) ? 0 : 255; - destPos += 4; - mask >>= 1; - } - } - ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); - } - } + function initSmaskGL() { + var canvas, gl; - function copyCtxState(sourceCtx, destCtx) { - var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', - 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', - 'globalCompositeOperation', 'font']; - for (var i = 0, ii = properties.length; i < ii; i++) { - var property = properties[i]; - if (sourceCtx[property] !== undefined) { - destCtx[property] = sourceCtx[property]; - } - } - if (sourceCtx.setLineDash !== undefined) { - destCtx.setLineDash(sourceCtx.getLineDash()); - destCtx.lineDashOffset = sourceCtx.lineDashOffset; - } else if (sourceCtx.mozDashOffset !== undefined) { - destCtx.mozDash = sourceCtx.mozDash; - destCtx.mozDashOffset = sourceCtx.mozDashOffset; - } - } + generateGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; - function composeSMaskBackdrop(bytes, r0, g0, b0) { - var length = bytes.length; - for (var i = 3; i < length; i += 4) { - var alpha = bytes[i]; - if (alpha === 0) { - bytes[i - 3] = r0; - bytes[i - 2] = g0; - bytes[i - 1] = b0; - } else if (alpha < 255) { - var alpha_ = 255 - alpha; - bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; - bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; - bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; - } - } - } + // setup a GLSL program + var vertexShader = createVertexShader(gl, smaskVertexShaderCode); + var fragmentShader = createFragmentShader(gl, smaskFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); - function composeSMaskAlpha(maskData, layerData, transferMap) { - var length = maskData.length; - var scale = 1 / 255; - for (var i = 3; i < length; i += 4) { - var alpha = transferMap ? transferMap[maskData[i]] : maskData[i]; - layerData[i] = (layerData[i] * alpha * scale) | 0; - } - } + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.backdropLocation = gl.getUniformLocation(program, 'u_backdrop'); + cache.subtypeLocation = gl.getUniformLocation(program, 'u_subtype'); - function composeSMaskLuminosity(maskData, layerData, transferMap) { - var length = maskData.length; - for (var i = 3; i < length; i += 4) { - var y = (maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 - (maskData[i - 2] * 152) + // * 0.59 .... - (maskData[i - 1] * 28); // * 0.11 .... - layerData[i] = transferMap ? - (layerData[i] * transferMap[y >> 8]) >> 8 : - (layerData[i] * y) >> 16; - } - } + var texCoordLocation = gl.getAttribLocation(program, 'a_texCoord'); + var texLayerLocation = gl.getUniformLocation(program, 'u_image'); + var texMaskLocation = gl.getUniformLocation(program, 'u_mask'); - function genericComposeSMask(maskCtx, layerCtx, width, height, - subtype, backdrop, transferMap) { - var hasBackdrop = !!backdrop; - var r0 = hasBackdrop ? backdrop[0] : 0; - var g0 = hasBackdrop ? backdrop[1] : 0; - var b0 = hasBackdrop ? backdrop[2] : 0; + // provide texture coordinates for the rectangle. + var texCoordBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, texCoordBuffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0.0, 0.0, + 1.0, 0.0, + 0.0, 1.0, + 0.0, 1.0, + 1.0, 0.0, + 1.0, 1.0]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(texCoordLocation); + gl.vertexAttribPointer(texCoordLocation, 2, gl.FLOAT, false, 0, 0); - var composeFn; - if (subtype === 'Luminosity') { - composeFn = composeSMaskLuminosity; - } else { - composeFn = composeSMaskAlpha; - } + gl.uniform1i(texLayerLocation, 0); + gl.uniform1i(texMaskLocation, 1); - // processing image in chunks to save memory - var PIXELS_TO_PROCESS = 1048576; - var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); - for (var row = 0; row < height; row += chunkSize) { - var chunkHeight = Math.min(chunkSize, height - row); - var maskData = maskCtx.getImageData(0, row, width, chunkHeight); - var layerData = layerCtx.getImageData(0, row, width, chunkHeight); + smaskCache = cache; + } - if (hasBackdrop) { - composeSMaskBackdrop(maskData.data, r0, g0, b0); - } - composeFn(maskData.data, layerData.data, transferMap); + function composeSMask(layer, mask, properties) { + var width = layer.width, height = layer.height; - maskCtx.putImageData(layerData, 0, row); + if (!smaskCache) { + initSmaskGL(); } - } + var cache = smaskCache,canvas = cache.canvas, gl = cache.gl; + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); - function composeSMask(ctx, smask, layerCtx) { - var mask = smask.canvas; - var maskCtx = smask.context; + if (properties.backdrop) { + gl.uniform4f(cache.resolutionLocation, properties.backdrop[0], + properties.backdrop[1], properties.backdrop[2], 1); + } else { + gl.uniform4f(cache.resolutionLocation, 0, 0, 0, 0); + } + gl.uniform1i(cache.subtypeLocation, + properties.subtype === 'Luminosity' ? 1 : 0); - ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, - smask.offsetX, smask.offsetY); + // Create a textures + var texture = createTexture(gl, layer, gl.TEXTURE0); + var maskTexture = createTexture(gl, mask, gl.TEXTURE1); - var backdrop = smask.backdrop || null; - if (!smask.transferMap && WebGLUtils.isEnabled) { - var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, - {subtype: smask.subtype, backdrop: backdrop}); - ctx.setTransform(1, 0, 0, 1, 0, 0); - ctx.drawImage(composed, smask.offsetX, smask.offsetY); - return; - } - genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, - smask.subtype, backdrop, smask.transferMap); - ctx.drawImage(mask, 0, 0); - } - var LINE_CAP_STYLES = ['butt', 'round', 'square']; - var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; - var NORMAL_CLIP = {}; - var EO_CLIP = {}; + // Create a buffer and put a single clipspace rectangle in + // it (2 triangles) + var buffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, buffer); + gl.bufferData(gl.ARRAY_BUFFER, new Float32Array([ + 0, 0, + width, 0, + 0, height, + 0, height, + width, 0, + width, height]), gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - CanvasGraphics.prototype = { + // draw + gl.clearColor(0, 0, 0, 0); + gl.enable(gl.BLEND); + gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA); + gl.clear(gl.COLOR_BUFFER_BIT); - beginDrawing: function CanvasGraphics_beginDrawing(transform, viewport, - transparency) { - // For pdfs that use blend modes we have to clear the canvas else certain - // blend modes can look wrong since we'd be blending with a white - // backdrop. The problem with a transparent backdrop though is we then - // don't get sub pixel anti aliasing on text, creating temporary - // transparent canvas when we have blend modes. - var width = this.ctx.canvas.width; - var height = this.ctx.canvas.height; + gl.drawArrays(gl.TRIANGLES, 0, 6); - this.ctx.save(); - this.ctx.fillStyle = 'rgb(255, 255, 255)'; - this.ctx.fillRect(0, 0, width, height); - this.ctx.restore(); + gl.flush(); - if (transparency) { - var transparentCanvas = this.cachedCanvases.getCanvas( - 'transparent', width, height, true); - this.compositeCtx = this.ctx; - this.transparentCanvas = transparentCanvas.canvas; - this.ctx = transparentCanvas.context; - this.ctx.save(); - // The transform can be applied before rendering, transferring it to - // the new canvas. - this.ctx.transform.apply(this.ctx, - this.compositeCtx.mozCurrentTransform); - } + gl.deleteTexture(texture); + gl.deleteTexture(maskTexture); + gl.deleteBuffer(buffer); - this.ctx.save(); - if (transform) { - this.ctx.transform.apply(this.ctx, transform); - } - this.ctx.transform.apply(this.ctx, viewport.transform); + return canvas; + } - this.baseTransform = this.ctx.mozCurrentTransform.slice(); + var figuresVertexShaderCode = '\ + attribute vec2 a_position; \ + attribute vec3 a_color; \ + \ + uniform vec2 u_resolution; \ + uniform vec2 u_scale; \ + uniform vec2 u_offset; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + vec2 position = (a_position + u_offset) * u_scale; \ + vec2 clipSpace = (position / u_resolution) * 2.0 - 1.0; \ + gl_Position = vec4(clipSpace * vec2(1, -1), 0, 1); \ + \ + v_color = vec4(a_color / 255.0, 1.0); \ + } '; - if (this.imageLayer) { - this.imageLayer.beginLayout(); - } - }, + var figuresFragmentShaderCode = '\ + precision mediump float; \ + \ + varying vec4 v_color; \ + \ + void main() { \ + gl_FragColor = v_color; \ + } '; - executeOperatorList: function CanvasGraphics_executeOperatorList( - operatorList, - executionStartIdx, continueCallback, - stepper) { - var argsArray = operatorList.argsArray; - var fnArray = operatorList.fnArray; - var i = executionStartIdx || 0; - var argsArrayLen = argsArray.length; + var figuresCache = null; - // Sometimes the OperatorList to execute is empty. - if (argsArrayLen === i) { - return i; - } + function initFiguresGL() { + var canvas, gl; - var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && - typeof continueCallback === 'function'); - var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; - var steps = 0; + generateGL(); + canvas = currentCanvas; + currentCanvas = null; + gl = currentGL; + currentGL = null; - var commonObjs = this.commonObjs; - var objs = this.objs; - var fnId; + // setup a GLSL program + var vertexShader = createVertexShader(gl, figuresVertexShaderCode); + var fragmentShader = createFragmentShader(gl, figuresFragmentShaderCode); + var program = createProgram(gl, [vertexShader, fragmentShader]); + gl.useProgram(program); - while (true) { - if (stepper !== undefined && i === stepper.nextBreakPoint) { - stepper.breakIt(i, continueCallback); - return i; - } + var cache = {}; + cache.gl = gl; + cache.canvas = canvas; + cache.resolutionLocation = gl.getUniformLocation(program, 'u_resolution'); + cache.scaleLocation = gl.getUniformLocation(program, 'u_scale'); + cache.offsetLocation = gl.getUniformLocation(program, 'u_offset'); + cache.positionLocation = gl.getAttribLocation(program, 'a_position'); + cache.colorLocation = gl.getAttribLocation(program, 'a_color'); - fnId = fnArray[i]; + figuresCache = cache; + } - if (fnId !== OPS.dependency) { - this[fnId].apply(this, argsArray[i]); - } else { - var deps = argsArray[i]; - for (var n = 0, nn = deps.length; n < nn; n++) { - var depObjId = deps[n]; - var common = depObjId[0] === 'g' && depObjId[1] === '_'; - var objsPool = common ? commonObjs : objs; + function drawFigures(width, height, backgroundColor, figures, context) { + if (!figuresCache) { + initFiguresGL(); + } + var cache = figuresCache, canvas = cache.canvas, gl = cache.gl; - // If the promise isn't resolved yet, add the continueCallback - // to the promise and bail out. - if (!objsPool.isResolved(depObjId)) { - objsPool.get(depObjId, continueCallback); - return i; + canvas.width = width; + canvas.height = height; + gl.viewport(0, 0, gl.drawingBufferWidth, gl.drawingBufferHeight); + gl.uniform2f(cache.resolutionLocation, width, height); + + // count triangle points + var count = 0; + var i, ii, rows; + for (i = 0, ii = figures.length; i < ii; i++) { + switch (figures[i].type) { + case 'lattice': + rows = (figures[i].coords.length / figures[i].verticesPerRow) | 0; + count += (rows - 1) * (figures[i].verticesPerRow - 1) * 6; + break; + case 'triangles': + count += figures[i].coords.length; + break; + } + } + // transfer data + var coords = new Float32Array(count * 2); + var colors = new Uint8Array(count * 3); + var coordsMap = context.coords, colorsMap = context.colors; + var pIndex = 0, cIndex = 0; + for (i = 0, ii = figures.length; i < ii; i++) { + var figure = figures[i], ps = figure.coords, cs = figure.colors; + switch (figure.type) { + case 'lattice': + var cols = figure.verticesPerRow; + rows = (ps.length / cols) | 0; + for (var row = 1; row < rows; row++) { + var offset = row * cols + 1; + for (var col = 1; col < cols; col++, offset++) { + coords[pIndex] = coordsMap[ps[offset - cols - 1]]; + coords[pIndex + 1] = coordsMap[ps[offset - cols - 1] + 1]; + coords[pIndex + 2] = coordsMap[ps[offset - cols]]; + coords[pIndex + 3] = coordsMap[ps[offset - cols] + 1]; + coords[pIndex + 4] = coordsMap[ps[offset - 1]]; + coords[pIndex + 5] = coordsMap[ps[offset - 1] + 1]; + colors[cIndex] = colorsMap[cs[offset - cols - 1]]; + colors[cIndex + 1] = colorsMap[cs[offset - cols - 1] + 1]; + colors[cIndex + 2] = colorsMap[cs[offset - cols - 1] + 2]; + colors[cIndex + 3] = colorsMap[cs[offset - cols]]; + colors[cIndex + 4] = colorsMap[cs[offset - cols] + 1]; + colors[cIndex + 5] = colorsMap[cs[offset - cols] + 2]; + colors[cIndex + 6] = colorsMap[cs[offset - 1]]; + colors[cIndex + 7] = colorsMap[cs[offset - 1] + 1]; + colors[cIndex + 8] = colorsMap[cs[offset - 1] + 2]; + + coords[pIndex + 6] = coords[pIndex + 2]; + coords[pIndex + 7] = coords[pIndex + 3]; + coords[pIndex + 8] = coords[pIndex + 4]; + coords[pIndex + 9] = coords[pIndex + 5]; + coords[pIndex + 10] = coordsMap[ps[offset]]; + coords[pIndex + 11] = coordsMap[ps[offset] + 1]; + colors[cIndex + 9] = colors[cIndex + 3]; + colors[cIndex + 10] = colors[cIndex + 4]; + colors[cIndex + 11] = colors[cIndex + 5]; + colors[cIndex + 12] = colors[cIndex + 6]; + colors[cIndex + 13] = colors[cIndex + 7]; + colors[cIndex + 14] = colors[cIndex + 8]; + colors[cIndex + 15] = colorsMap[cs[offset]]; + colors[cIndex + 16] = colorsMap[cs[offset] + 1]; + colors[cIndex + 17] = colorsMap[cs[offset] + 2]; + pIndex += 12; + cIndex += 18; } } - } + break; + case 'triangles': + for (var j = 0, jj = ps.length; j < jj; j++) { + coords[pIndex] = coordsMap[ps[j]]; + coords[pIndex + 1] = coordsMap[ps[j] + 1]; + colors[cIndex] = colorsMap[cs[j]]; + colors[cIndex + 1] = colorsMap[cs[j] + 1]; + colors[cIndex + 2] = colorsMap[cs[j] + 2]; + pIndex += 2; + cIndex += 3; + } + break; + } + } - i++; + // draw + if (backgroundColor) { + gl.clearColor(backgroundColor[0] / 255, backgroundColor[1] / 255, + backgroundColor[2] / 255, 1.0); + } else { + gl.clearColor(0, 0, 0, 0); + } + gl.clear(gl.COLOR_BUFFER_BIT); - // If the entire operatorList was executed, stop as were done. - if (i === argsArrayLen) { - return i; - } + var coordsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, coordsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, coords, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.positionLocation); + gl.vertexAttribPointer(cache.positionLocation, 2, gl.FLOAT, false, 0, 0); - // If the execution took longer then a certain amount of time and - // `continueCallback` is specified, interrupt the execution. - if (chunkOperations && ++steps > EXECUTION_STEPS) { - if (Date.now() > endTime) { - continueCallback(); - return i; - } - steps = 0; - } + var colorsBuffer = gl.createBuffer(); + gl.bindBuffer(gl.ARRAY_BUFFER, colorsBuffer); + gl.bufferData(gl.ARRAY_BUFFER, colors, gl.STATIC_DRAW); + gl.enableVertexAttribArray(cache.colorLocation); + gl.vertexAttribPointer(cache.colorLocation, 3, gl.UNSIGNED_BYTE, false, + 0, 0); - // If the operatorList isn't executed completely yet OR the execution - // time was short enough, do another execution round. - } - }, + gl.uniform2f(cache.scaleLocation, context.scaleX, context.scaleY); + gl.uniform2f(cache.offsetLocation, context.offsetX, context.offsetY); - endDrawing: function CanvasGraphics_endDrawing() { - this.ctx.restore(); + gl.drawArrays(gl.TRIANGLES, 0, count); - if (this.transparentCanvas) { - this.ctx = this.compositeCtx; - this.ctx.drawImage(this.transparentCanvas, 0, 0); - this.transparentCanvas = null; - } + gl.flush(); - this.cachedCanvases.clear(); - WebGLUtils.clear(); + gl.deleteBuffer(coordsBuffer); + gl.deleteBuffer(colorsBuffer); - if (this.imageLayer) { - this.imageLayer.endLayout(); - } - }, + return canvas; + } - // Graphics state - setLineWidth: function CanvasGraphics_setLineWidth(width) { - this.current.lineWidth = width; - this.ctx.lineWidth = width; - }, - setLineCap: function CanvasGraphics_setLineCap(style) { - this.ctx.lineCap = LINE_CAP_STYLES[style]; - }, - setLineJoin: function CanvasGraphics_setLineJoin(style) { - this.ctx.lineJoin = LINE_JOIN_STYLES[style]; - }, - setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { - this.ctx.miterLimit = limit; - }, - setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { - var ctx = this.ctx; - if (ctx.setLineDash !== undefined) { - ctx.setLineDash(dashArray); - ctx.lineDashOffset = dashPhase; - } else { - ctx.mozDash = dashArray; - ctx.mozDashOffset = dashPhase; - } - }, - setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { - // Maybe if we one day fully support color spaces this will be important - // for now we can ignore. - // TODO set rendering intent? - }, - setFlatness: function CanvasGraphics_setFlatness(flatness) { - // There's no way to control this with canvas, but we can safely ignore. - // TODO set flatness? - }, - setGState: function CanvasGraphics_setGState(states) { - for (var i = 0, ii = states.length; i < ii; i++) { - var state = states[i]; - var key = state[0]; - var value = state[1]; + function cleanup() { + if (smaskCache && smaskCache.canvas) { + smaskCache.canvas.width = 0; + smaskCache.canvas.height = 0; + } + if (figuresCache && figuresCache.canvas) { + figuresCache.canvas.width = 0; + figuresCache.canvas.height = 0; + } + smaskCache = null; + figuresCache = null; + } - switch (key) { - case 'LW': - this.setLineWidth(value); - break; - case 'LC': - this.setLineCap(value); - break; - case 'LJ': - this.setLineJoin(value); - break; - case 'ML': - this.setMiterLimit(value); - break; - case 'D': - this.setDash(value[0], value[1]); - break; - case 'RI': - this.setRenderingIntent(value); - break; - case 'FL': - this.setFlatness(value); - break; - case 'Font': - this.setFont(value[0], value[1]); - break; - case 'CA': - this.current.strokeAlpha = state[1]; - break; - case 'ca': - this.current.fillAlpha = state[1]; - this.ctx.globalAlpha = state[1]; - break; - case 'BM': - if (value && value.name && (value.name !== 'Normal')) { - var mode = value.name.replace(/([A-Z])/g, - function(c) { - return '-' + c.toLowerCase(); - } - ).substring(1); - this.ctx.globalCompositeOperation = mode; - if (this.ctx.globalCompositeOperation !== mode) { - warn('globalCompositeOperation "' + mode + - '" is not supported'); - } - } else { - this.ctx.globalCompositeOperation = 'source-over'; - } - break; - case 'SMask': - if (this.current.activeSMask) { - this.endSMaskGroup(); - } - this.current.activeSMask = value ? this.tempSMask : null; - if (this.current.activeSMask) { - this.beginSMaskGroup(); - } - this.tempSMask = null; - break; - } + return { + get isEnabled() { + if (PDFJS.disableWebGL) { + return false; } + var enabled = false; + try { + generateGL(); + enabled = !!currentGL; + } catch (e) { } + return shadow(this, 'isEnabled', enabled); }, - beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { - - var activeSMask = this.current.activeSMask; - var drawnWidth = activeSMask.canvas.width; - var drawnHeight = activeSMask.canvas.height; - var cacheId = 'smaskGroupAt' + this.groupLevel; - var scratchCanvas = this.cachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); + composeSMask: composeSMask, + drawFigures: drawFigures, + clear: cleanup + }; +})(); - var currentCtx = this.ctx; - var currentTransform = currentCtx.mozCurrentTransform; - this.ctx.save(); +exports.WebGLUtils = WebGLUtils; +})); - var groupCtx = scratchCanvas.context; - groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); - groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); - groupCtx.transform.apply(groupCtx, currentTransform); - copyCtxState(currentCtx, groupCtx); - this.ctx = groupCtx; - this.setGState([ - ['BM', 'Normal'], - ['ca', 1], - ['CA', 1] - ]); - this.groupStack.push(currentCtx); - this.groupLevel++; - }, - endSMaskGroup: function CanvasGraphics_endSMaskGroup() { - var groupCtx = this.ctx; - this.groupLevel--; - this.ctx = this.groupStack.pop(); +(function (root, factory) { + { + factory((root.pdfjsDisplayPatternHelper = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayWebGL); + } +}(this, function (exports, sharedUtil, displayWebGL) { - composeSMask(this.ctx, this.current.activeSMask, groupCtx); - this.ctx.restore(); - copyCtxState(groupCtx, this.ctx); - }, - save: function CanvasGraphics_save() { - this.ctx.save(); - var old = this.current; - this.stateStack.push(old); - this.current = old.clone(); - this.current.activeSMask = null; - }, - restore: function CanvasGraphics_restore() { - if (this.stateStack.length !== 0) { - if (this.current.activeSMask !== null) { - this.endSMaskGroup(); - } +var Util = sharedUtil.Util; +var info = sharedUtil.info; +var isArray = sharedUtil.isArray; +var error = sharedUtil.error; +var WebGLUtils = displayWebGL.WebGLUtils; - this.current = this.stateStack.pop(); - this.ctx.restore(); +var ShadingIRs = {}; - // Ensure that the clipping path is reset (fixes issue6413.pdf). - this.pendingClip = null; +ShadingIRs.RadialAxial = { + fromIR: function RadialAxial_fromIR(raw) { + var type = raw[1]; + var colorStops = raw[2]; + var p0 = raw[3]; + var p1 = raw[4]; + var r0 = raw[5]; + var r1 = raw[6]; + return { + type: 'Pattern', + getPattern: function RadialAxial_getPattern(ctx) { + var grad; + if (type === 'axial') { + grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]); + } else if (type === 'radial') { + grad = ctx.createRadialGradient(p0[0], p0[1], r0, p1[0], p1[1], r1); + } - this.cachedGetSinglePixelWidth = null; - } - }, - transform: function CanvasGraphics_transform(a, b, c, d, e, f) { - this.ctx.transform(a, b, c, d, e, f); - - this.cachedGetSinglePixelWidth = null; - }, - - // Path - constructPath: function CanvasGraphics_constructPath(ops, args) { - var ctx = this.ctx; - var current = this.current; - var x = current.x, y = current.y; - for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { - switch (ops[i] | 0) { - case OPS.rectangle: - x = args[j++]; - y = args[j++]; - var width = args[j++]; - var height = args[j++]; - if (width === 0) { - width = this.getSinglePixelWidth(); - } - if (height === 0) { - height = this.getSinglePixelWidth(); - } - var xw = x + width; - var yh = y + height; - this.ctx.moveTo(x, y); - this.ctx.lineTo(xw, y); - this.ctx.lineTo(xw, yh); - this.ctx.lineTo(x, yh); - this.ctx.lineTo(x, y); - this.ctx.closePath(); - break; - case OPS.moveTo: - x = args[j++]; - y = args[j++]; - ctx.moveTo(x, y); - break; - case OPS.lineTo: - x = args[j++]; - y = args[j++]; - ctx.lineTo(x, y); - break; - case OPS.curveTo: - x = args[j + 4]; - y = args[j + 5]; - ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], - x, y); - j += 6; - break; - case OPS.curveTo2: - ctx.bezierCurveTo(x, y, args[j], args[j + 1], - args[j + 2], args[j + 3]); - x = args[j + 2]; - y = args[j + 3]; - j += 4; - break; - case OPS.curveTo3: - x = args[j + 2]; - y = args[j + 3]; - ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); - j += 4; - break; - case OPS.closePath: - ctx.closePath(); - break; - } - } - current.setCurrentPoint(x, y); - }, - closePath: function CanvasGraphics_closePath() { - this.ctx.closePath(); - }, - stroke: function CanvasGraphics_stroke(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; - var ctx = this.ctx; - var strokeColor = this.current.strokeColor; - // Prevent drawing too thin lines by enforcing a minimum line width. - ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR, - this.current.lineWidth); - // For stroke we want to temporarily change the global alpha to the - // stroking alpha. - ctx.globalAlpha = this.current.strokeAlpha; - if (strokeColor && strokeColor.hasOwnProperty('type') && - strokeColor.type === 'Pattern') { - // for patterns, we transform to pattern space, calculate - // the pattern, call stroke, and restore to user space - ctx.save(); - ctx.strokeStyle = strokeColor.getPattern(ctx, this); - ctx.stroke(); - ctx.restore(); - } else { - ctx.stroke(); - } - if (consumePath) { - this.consumePath(); - } - // Restore the global alpha to the fill alpha - ctx.globalAlpha = this.current.fillAlpha; - }, - closeStroke: function CanvasGraphics_closeStroke() { - this.closePath(); - this.stroke(); - }, - fill: function CanvasGraphics_fill(consumePath) { - consumePath = typeof consumePath !== 'undefined' ? consumePath : true; - var ctx = this.ctx; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - var needRestore = false; - - if (isPatternFill) { - ctx.save(); - if (this.baseTransform) { - ctx.setTransform.apply(ctx, this.baseTransform); - } - ctx.fillStyle = fillColor.getPattern(ctx, this); - needRestore = true; - } - - if (this.pendingEOFill) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.fill(); - ctx.mozFillRule = 'nonzero'; - } else { - ctx.fill('evenodd'); + for (var i = 0, ii = colorStops.length; i < ii; ++i) { + var c = colorStops[i]; + grad.addColorStop(c[0], c[1]); } - this.pendingEOFill = false; - } else { - ctx.fill(); - } - - if (needRestore) { - ctx.restore(); - } - if (consumePath) { - this.consumePath(); - } - }, - eoFill: function CanvasGraphics_eoFill() { - this.pendingEOFill = true; - this.fill(); - }, - fillStroke: function CanvasGraphics_fillStroke() { - this.fill(false); - this.stroke(false); - - this.consumePath(); - }, - eoFillStroke: function CanvasGraphics_eoFillStroke() { - this.pendingEOFill = true; - this.fillStroke(); - }, - closeFillStroke: function CanvasGraphics_closeFillStroke() { - this.closePath(); - this.fillStroke(); - }, - closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { - this.pendingEOFill = true; - this.closePath(); - this.fillStroke(); - }, - endPath: function CanvasGraphics_endPath() { - this.consumePath(); - }, - - // Clipping - clip: function CanvasGraphics_clip() { - this.pendingClip = NORMAL_CLIP; - }, - eoClip: function CanvasGraphics_eoClip() { - this.pendingClip = EO_CLIP; - }, - - // Text - beginText: function CanvasGraphics_beginText() { - this.current.textMatrix = IDENTITY_MATRIX; - this.current.textMatrixScale = 1; - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - }, - endText: function CanvasGraphics_endText() { - var paths = this.pendingTextPaths; - var ctx = this.ctx; - if (paths === undefined) { - ctx.beginPath(); - return; - } - - ctx.save(); - ctx.beginPath(); - for (var i = 0; i < paths.length; i++) { - var path = paths[i]; - ctx.setTransform.apply(ctx, path.transform); - ctx.translate(path.x, path.y); - path.addToPath(ctx, path.fontSize); - } - ctx.restore(); - ctx.clip(); - ctx.beginPath(); - delete this.pendingTextPaths; - }, - setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { - this.current.charSpacing = spacing; - }, - setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { - this.current.wordSpacing = spacing; - }, - setHScale: function CanvasGraphics_setHScale(scale) { - this.current.textHScale = scale / 100; - }, - setLeading: function CanvasGraphics_setLeading(leading) { - this.current.leading = -leading; - }, - setFont: function CanvasGraphics_setFont(fontRefName, size) { - var fontObj = this.commonObjs.get(fontRefName); - var current = this.current; - - if (!fontObj) { - error('Can\'t find font for ' + fontRefName); + return grad; } + }; + } +}; - current.fontMatrix = (fontObj.fontMatrix ? - fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - - // A valid matrix needs all main diagonal elements to be non-zero - // This also ensures we bypass FF bugzilla bug #719844. - if (current.fontMatrix[0] === 0 || - current.fontMatrix[3] === 0) { - warn('Invalid font matrix for font ' + fontRefName); - } +var createMeshCanvas = (function createMeshCanvasClosure() { + function drawTriangle(data, context, p1, p2, p3, c1, c2, c3) { + // Very basic Gouraud-shaded triangle rasterization algorithm. + var coords = context.coords, colors = context.colors; + var bytes = data.data, rowSize = data.width * 4; + var tmp; + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + if (coords[p2 + 1] > coords[p3 + 1]) { + tmp = p2; p2 = p3; p3 = tmp; tmp = c2; c2 = c3; c3 = tmp; + } + if (coords[p1 + 1] > coords[p2 + 1]) { + tmp = p1; p1 = p2; p2 = tmp; tmp = c1; c1 = c2; c2 = tmp; + } + var x1 = (coords[p1] + context.offsetX) * context.scaleX; + var y1 = (coords[p1 + 1] + context.offsetY) * context.scaleY; + var x2 = (coords[p2] + context.offsetX) * context.scaleX; + var y2 = (coords[p2 + 1] + context.offsetY) * context.scaleY; + var x3 = (coords[p3] + context.offsetX) * context.scaleX; + var y3 = (coords[p3 + 1] + context.offsetY) * context.scaleY; + if (y1 >= y3) { + return; + } + var c1r = colors[c1], c1g = colors[c1 + 1], c1b = colors[c1 + 2]; + var c2r = colors[c2], c2g = colors[c2 + 1], c2b = colors[c2 + 2]; + var c3r = colors[c3], c3g = colors[c3 + 1], c3b = colors[c3 + 2]; - // The spec for Tf (setFont) says that 'size' specifies the font 'scale', - // and in some docs this can be negative (inverted x-y axes). - if (size < 0) { - size = -size; - current.fontDirection = -1; + var minY = Math.round(y1), maxY = Math.round(y3); + var xa, car, cag, cab; + var xb, cbr, cbg, cbb; + var k; + for (var y = minY; y <= maxY; y++) { + if (y < y2) { + k = y < y1 ? 0 : y1 === y2 ? 1 : (y1 - y) / (y1 - y2); + xa = x1 - (x1 - x2) * k; + car = c1r - (c1r - c2r) * k; + cag = c1g - (c1g - c2g) * k; + cab = c1b - (c1b - c2b) * k; } else { - current.fontDirection = 1; + k = y > y3 ? 1 : y2 === y3 ? 0 : (y2 - y) / (y2 - y3); + xa = x2 - (x2 - x3) * k; + car = c2r - (c2r - c3r) * k; + cag = c2g - (c2g - c3g) * k; + cab = c2b - (c2b - c3b) * k; } - - this.current.font = fontObj; - this.current.fontSize = size; - - if (fontObj.isType3Font) { - return; // we don't need ctx.font for Type3 fonts + k = y < y1 ? 0 : y > y3 ? 1 : (y1 - y) / (y1 - y3); + xb = x1 - (x1 - x3) * k; + cbr = c1r - (c1r - c3r) * k; + cbg = c1g - (c1g - c3g) * k; + cbb = c1b - (c1b - c3b) * k; + var x1_ = Math.round(Math.min(xa, xb)); + var x2_ = Math.round(Math.max(xa, xb)); + var j = rowSize * y + x1_ * 4; + for (var x = x1_; x <= x2_; x++) { + k = (xa - x) / (xa - xb); + k = k < 0 ? 0 : k > 1 ? 1 : k; + bytes[j++] = (car - (car - cbr) * k) | 0; + bytes[j++] = (cag - (cag - cbg) * k) | 0; + bytes[j++] = (cab - (cab - cbb) * k) | 0; + bytes[j++] = 255; } + } + } - var name = fontObj.loadedName || 'sans-serif'; - var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - - var italic = fontObj.italic ? 'italic' : 'normal'; - var typeface = '"' + name + '", ' + fontObj.fallbackName; - - // Some font backends cannot handle fonts below certain size. - // Keeping the font at minimal size and using the fontSizeScale to change - // the current transformation matrix before the fillText/strokeText. - // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 - var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE : - size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size; - this.current.fontSizeScale = size / browserFontSize; + function drawFigure(data, figure, context) { + var ps = figure.coords; + var cs = figure.colors; + var i, ii; + switch (figure.type) { + case 'lattice': + var verticesPerRow = figure.verticesPerRow; + var rows = Math.floor(ps.length / verticesPerRow) - 1; + var cols = verticesPerRow - 1; + for (i = 0; i < rows; i++) { + var q = i * verticesPerRow; + for (var j = 0; j < cols; j++, q++) { + drawTriangle(data, context, + ps[q], ps[q + 1], ps[q + verticesPerRow], + cs[q], cs[q + 1], cs[q + verticesPerRow]); + drawTriangle(data, context, + ps[q + verticesPerRow + 1], ps[q + 1], ps[q + verticesPerRow], + cs[q + verticesPerRow + 1], cs[q + 1], cs[q + verticesPerRow]); + } + } + break; + case 'triangles': + for (i = 0, ii = ps.length; i < ii; i += 3) { + drawTriangle(data, context, + ps[i], ps[i + 1], ps[i + 2], + cs[i], cs[i + 1], cs[i + 2]); + } + break; + default: + error('illigal figure'); + break; + } + } - var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; - this.ctx.font = rule; - }, - setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { - this.current.textRenderingMode = mode; - }, - setTextRise: function CanvasGraphics_setTextRise(rise) { - this.current.textRise = rise; - }, - moveText: function CanvasGraphics_moveText(x, y) { - this.current.x = this.current.lineX += x; - this.current.y = this.current.lineY += y; - }, - setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { - this.setLeading(-y); - this.moveText(x, y); - }, - setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { - this.current.textMatrix = [a, b, c, d, e, f]; - this.current.textMatrixScale = Math.sqrt(a * a + b * b); + function createMeshCanvas(bounds, combinesScale, coords, colors, figures, + backgroundColor, cachedCanvases) { + // we will increase scale on some weird factor to let antialiasing take + // care of "rough" edges + var EXPECTED_SCALE = 1.1; + // MAX_PATTERN_SIZE is used to avoid OOM situation. + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - }, - nextLine: function CanvasGraphics_nextLine() { - this.moveText(0, this.current.leading); - }, + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var boundsWidth = Math.ceil(bounds[2]) - offsetX; + var boundsHeight = Math.ceil(bounds[3]) - offsetY; - paintChar: function CanvasGraphics_paintChar(character, x, y) { - var ctx = this.ctx; - var current = this.current; - var font = current.font; - var textRenderingMode = current.textRenderingMode; - var fontSize = current.fontSize / current.fontSizeScale; - var fillStrokeMode = textRenderingMode & - TextRenderingMode.FILL_STROKE_MASK; - var isAddToPathSet = !!(textRenderingMode & - TextRenderingMode.ADD_TO_PATH_FLAG); + var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] * + EXPECTED_SCALE)), MAX_PATTERN_SIZE); + var scaleX = boundsWidth / width; + var scaleY = boundsHeight / height; - var addToPath; - if (font.disableFontFace || isAddToPathSet) { - addToPath = font.getPathGenerator(this.commonObjs, character); - } + var context = { + coords: coords, + colors: colors, + offsetX: -offsetX, + offsetY: -offsetY, + scaleX: 1 / scaleX, + scaleY: 1 / scaleY + }; - if (font.disableFontFace) { - ctx.save(); - ctx.translate(x, y); - ctx.beginPath(); - addToPath(ctx, fontSize); - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fill(); - } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.stroke(); - } - ctx.restore(); - } else { - if (fillStrokeMode === TextRenderingMode.FILL || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.fillText(character, x, y); - } - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - ctx.strokeText(character, x, y); - } - } + var canvas, tmpCanvas, i, ii; + if (WebGLUtils.isEnabled) { + canvas = WebGLUtils.drawFigures(width, height, backgroundColor, + figures, context); - if (isAddToPathSet) { - var paths = this.pendingTextPaths || (this.pendingTextPaths = []); - paths.push({ - transform: ctx.mozCurrentTransform, - x: x, - y: y, - fontSize: fontSize, - addToPath: addToPath - }); - } - }, + // https://bugzilla.mozilla.org/show_bug.cgi?id=972126 + tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); + tmpCanvas.context.drawImage(canvas, 0, 0); + canvas = tmpCanvas.canvas; + } else { + tmpCanvas = cachedCanvases.getCanvas('mesh', width, height, false); + var tmpCtx = tmpCanvas.context; - get isFontSubpixelAAEnabled() { - // Checks if anti-aliasing is enabled when scaled text is painted. - // On Windows GDI scaled fonts looks bad. - var ctx = document.createElement('canvas').getContext('2d'); - ctx.scale(1.5, 1); - ctx.fillText('I', 0, 10); - var data = ctx.getImageData(0, 0, 10, 10).data; - var enabled = false; - for (var i = 3; i < data.length; i += 4) { - if (data[i] > 0 && data[i] < 255) { - enabled = true; - break; + var data = tmpCtx.createImageData(width, height); + if (backgroundColor) { + var bytes = data.data; + for (i = 0, ii = bytes.length; i < ii; i += 4) { + bytes[i] = backgroundColor[0]; + bytes[i + 1] = backgroundColor[1]; + bytes[i + 2] = backgroundColor[2]; + bytes[i + 3] = 255; } } - return shadow(this, 'isFontSubpixelAAEnabled', enabled); - }, - - showText: function CanvasGraphics_showText(glyphs) { - var current = this.current; - var font = current.font; - if (font.isType3Font) { - return this.showType3Text(glyphs); - } - - var fontSize = current.fontSize; - if (fontSize === 0) { - return; + for (i = 0; i < figures.length; i++) { + drawFigure(data, figures[i], context); } + tmpCtx.putImageData(data, 0, 0); + canvas = tmpCanvas.canvas; + } - var ctx = this.ctx; - var fontSizeScale = current.fontSizeScale; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var fontDirection = current.fontDirection; - var textHScale = current.textHScale * fontDirection; - var glyphsLength = glyphs.length; - var vertical = font.vertical; - var spacingDir = vertical ? 1 : -1; - var defaultVMetrics = font.defaultVMetrics; - var widthAdvanceScale = fontSize * current.fontMatrix[0]; - - var simpleFillText = - current.textRenderingMode === TextRenderingMode.FILL && - !font.disableFontFace; + return {canvas: canvas, offsetX: offsetX, offsetY: offsetY, + scaleX: scaleX, scaleY: scaleY}; + } + return createMeshCanvas; +})(); - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y + current.textRise); +ShadingIRs.Mesh = { + fromIR: function Mesh_fromIR(raw) { + //var type = raw[1]; + var coords = raw[2]; + var colors = raw[3]; + var figures = raw[4]; + var bounds = raw[5]; + var matrix = raw[6]; + //var bbox = raw[7]; + var background = raw[8]; + return { + type: 'Pattern', + getPattern: function Mesh_getPattern(ctx, owner, shadingFill) { + var scale; + if (shadingFill) { + scale = Util.singularValueDecompose2dScale(ctx.mozCurrentTransform); + } else { + // Obtain scale from matrix and current transformation matrix. + scale = Util.singularValueDecompose2dScale(owner.baseTransform); + if (matrix) { + var matrixScale = Util.singularValueDecompose2dScale(matrix); + scale = [scale[0] * matrixScale[0], + scale[1] * matrixScale[1]]; + } + } - if (fontDirection > 0) { - ctx.scale(textHScale, -1); - } else { - ctx.scale(textHScale, 1); - } - var lineWidth = current.lineWidth; - var scale = current.textMatrixScale; - if (scale === 0 || lineWidth === 0) { - var fillStrokeMode = current.textRenderingMode & - TextRenderingMode.FILL_STROKE_MASK; - if (fillStrokeMode === TextRenderingMode.STROKE || - fillStrokeMode === TextRenderingMode.FILL_STROKE) { - this.cachedGetSinglePixelWidth = null; - lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR; + // Rasterizing on the main thread since sending/queue large canvases + // might cause OOM. + var temporaryPatternCanvas = createMeshCanvas(bounds, scale, coords, + colors, figures, shadingFill ? null : background, + owner.cachedCanvases); + + if (!shadingFill) { + ctx.setTransform.apply(ctx, owner.baseTransform); + if (matrix) { + ctx.transform.apply(ctx, matrix); + } } - } else { - lineWidth /= scale; - } - if (fontSizeScale !== 1.0) { - ctx.scale(fontSizeScale, fontSizeScale); - lineWidth /= fontSizeScale; + ctx.translate(temporaryPatternCanvas.offsetX, + temporaryPatternCanvas.offsetY); + ctx.scale(temporaryPatternCanvas.scaleX, + temporaryPatternCanvas.scaleY); + + return ctx.createPattern(temporaryPatternCanvas.canvas, 'no-repeat'); } + }; + } +}; - ctx.lineWidth = lineWidth; +ShadingIRs.Dummy = { + fromIR: function Dummy_fromIR() { + return { + type: 'Pattern', + getPattern: function Dummy_fromIR_getPattern() { + return 'hotpink'; + } + }; + } +}; - var x = 0, i; - for (i = 0; i < glyphsLength; ++i) { - var glyph = glyphs[i]; - if (isNum(glyph)) { - x += spacingDir * glyph * fontSize / 1000; - continue; - } +function getShadingPatternFromIR(raw) { + var shadingIR = ShadingIRs[raw[0]]; + if (!shadingIR) { + error('Unknown IR type: ' + raw[0]); + } + return shadingIR.fromIR(raw); +} - var restoreNeeded = false; - var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; - var character = glyph.fontChar; - var accent = glyph.accent; - var scaledX, scaledY, scaledAccentX, scaledAccentY; - var width = glyph.width; - if (vertical) { - var vmetric, vx, vy; - vmetric = glyph.vmetric || defaultVMetrics; - vx = glyph.vmetric ? vmetric[1] : width * 0.5; - vx = -vx * widthAdvanceScale; - vy = vmetric[2] * widthAdvanceScale; +var TilingPattern = (function TilingPatternClosure() { + var PaintType = { + COLORED: 1, + UNCOLORED: 2 + }; - width = vmetric ? -vmetric[0] : width; - scaledX = vx / fontSizeScale; - scaledY = (x + vy) / fontSizeScale; - } else { - scaledX = x / fontSizeScale; - scaledY = 0; - } + var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough - if (font.remeasure && width > 0) { - // Some standard fonts may not have the exact width: rescale per - // character if measured width is greater than expected glyph width - // and subpixel-aa is enabled, otherwise just center the glyph. - var measuredWidth = ctx.measureText(character).width * 1000 / - fontSize * fontSizeScale; - if (width < measuredWidth && this.isFontSubpixelAAEnabled) { - var characterScaleX = width / measuredWidth; - restoreNeeded = true; - ctx.save(); - ctx.scale(characterScaleX, 1); - scaledX /= characterScaleX; - } else if (width !== measuredWidth) { - scaledX += (width - measuredWidth) / 2000 * - fontSize / fontSizeScale; - } - } + function TilingPattern(IR, color, ctx, canvasGraphicsFactory, baseTransform) { + this.operatorList = IR[2]; + this.matrix = IR[3] || [1, 0, 0, 1, 0, 0]; + this.bbox = IR[4]; + this.xstep = IR[5]; + this.ystep = IR[6]; + this.paintType = IR[7]; + this.tilingType = IR[8]; + this.color = color; + this.canvasGraphicsFactory = canvasGraphicsFactory; + this.baseTransform = baseTransform; + this.type = 'Pattern'; + this.ctx = ctx; + } - if (simpleFillText && !accent) { - // common case - ctx.fillText(character, scaledX, scaledY); - } else { - this.paintChar(character, scaledX, scaledY); - if (accent) { - scaledAccentX = scaledX + accent.offset.x / fontSizeScale; - scaledAccentY = scaledY - accent.offset.y / fontSizeScale; - this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); - } - } + TilingPattern.prototype = { + createPatternCanvas: function TilinPattern_createPatternCanvas(owner) { + var operatorList = this.operatorList; + var bbox = this.bbox; + var xstep = this.xstep; + var ystep = this.ystep; + var paintType = this.paintType; + var tilingType = this.tilingType; + var color = this.color; + var canvasGraphicsFactory = this.canvasGraphicsFactory; - var charWidth = width * widthAdvanceScale + spacing * fontDirection; - x += charWidth; + info('TilingType: ' + tilingType); - if (restoreNeeded) { - ctx.restore(); - } - } - if (vertical) { - current.y -= x * textHScale; - } else { - current.x += x * textHScale; - } - ctx.restore(); - }, + var x0 = bbox[0], y0 = bbox[1], x1 = bbox[2], y1 = bbox[3]; - showType3Text: function CanvasGraphics_showType3Text(glyphs) { - // Type3 fonts - each glyph is a "mini-PDF" - var ctx = this.ctx; - var current = this.current; - var font = current.font; - var fontSize = current.fontSize; - var fontDirection = current.fontDirection; - var spacingDir = font.vertical ? 1 : -1; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var textHScale = current.textHScale * fontDirection; - var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; - var glyphsLength = glyphs.length; - var isTextInvisible = - current.textRenderingMode === TextRenderingMode.INVISIBLE; - var i, glyph, width, spacingLength; + var topLeft = [x0, y0]; + // we want the canvas to be as large as the step size + var botRight = [x0 + xstep, y0 + ystep]; - if (isTextInvisible || fontSize === 0) { - return; - } - this.cachedGetSinglePixelWidth = null; + var width = botRight[0] - topLeft[0]; + var height = botRight[1] - topLeft[1]; - ctx.save(); - ctx.transform.apply(ctx, current.textMatrix); - ctx.translate(current.x, current.y); + // Obtain scale from matrix and current transformation matrix. + var matrixScale = Util.singularValueDecompose2dScale(this.matrix); + var curMatrixScale = Util.singularValueDecompose2dScale( + this.baseTransform); + var combinedScale = [matrixScale[0] * curMatrixScale[0], + matrixScale[1] * curMatrixScale[1]]; - ctx.scale(textHScale, fontDirection); + // MAX_PATTERN_SIZE is used to avoid OOM situation. + // Use width and height values that are as close as possible to the end + // result when the pattern is used. Too low value makes the pattern look + // blurry. Too large value makes it look too crispy. + width = Math.min(Math.ceil(Math.abs(width * combinedScale[0])), + MAX_PATTERN_SIZE); - for (i = 0; i < glyphsLength; ++i) { - glyph = glyphs[i]; - if (isNum(glyph)) { - spacingLength = spacingDir * glyph * fontSize / 1000; - this.ctx.translate(spacingLength, 0); - current.x += spacingLength * textHScale; - continue; - } + height = Math.min(Math.ceil(Math.abs(height * combinedScale[1])), + MAX_PATTERN_SIZE); - var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; - var operatorList = font.charProcOperatorList[glyph.operatorListId]; - if (!operatorList) { - warn('Type3 character \"' + glyph.operatorListId + - '\" is not available'); - continue; - } - this.processingType3 = glyph; - this.save(); - ctx.scale(fontSize, fontSize); - ctx.transform.apply(ctx, fontMatrix); - this.executeOperatorList(operatorList); - this.restore(); + var tmpCanvas = owner.cachedCanvases.getCanvas('pattern', + width, height, true); + var tmpCtx = tmpCanvas.context; + var graphics = canvasGraphicsFactory.createCanvasGraphics(tmpCtx); + graphics.groupLevel = owner.groupLevel; - var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); - width = transformed[0] * fontSize + spacing; + this.setFillAndStrokeStyleToContext(tmpCtx, paintType, color); - ctx.translate(width, 0); - current.x += width * textHScale; - } - ctx.restore(); - this.processingType3 = null; - }, + this.setScale(width, height, xstep, ystep); + this.transformToScale(graphics); - // Type3 fonts - setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { - // We can safely ignore this since the width should be the same - // as the width in the Widths array. - }, - setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, - yWidth, - llx, - lly, - urx, - ury) { - // TODO According to the spec we're also suppose to ignore any operators - // that set color or include images while processing this type3 font. - this.ctx.rect(llx, lly, urx - llx, ury - lly); - this.clip(); - this.endPath(); - }, + // transform coordinates to pattern space + var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]]; + graphics.transform.apply(graphics, tmpTranslate); - // Color - getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { - var pattern; - if (IR[0] === 'TilingPattern') { - var color = IR[1]; - var baseTransform = this.baseTransform || - this.ctx.mozCurrentTransform.slice(); - var self = this; - var canvasGraphicsFactory = { - createCanvasGraphics: function (ctx) { - return new CanvasGraphics(ctx, self.commonObjs, self.objs); - } - }; - pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, - baseTransform); - } else { - pattern = getShadingPatternFromIR(IR); - } - return pattern; - }, - setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { - this.current.strokeColor = this.getColorN_Pattern(arguments); + this.clipBbox(graphics, bbox, x0, y0, x1, y1); + + graphics.executeOperatorList(operatorList); + return tmpCanvas.canvas; }, - setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { - this.current.fillColor = this.getColorN_Pattern(arguments); - this.current.patternFill = true; + + setScale: function TilingPattern_setScale(width, height, xstep, ystep) { + this.scale = [width / xstep, height / ystep]; }, - setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.ctx.strokeStyle = color; - this.current.strokeColor = color; + + transformToScale: function TilingPattern_transformToScale(graphics) { + var scale = this.scale; + var tmpScale = [scale[0], 0, 0, scale[1], 0, 0]; + graphics.transform.apply(graphics, tmpScale); }, - setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.ctx.fillStyle = color; - this.current.fillColor = color; - this.current.patternFill = false; + + scaleToContext: function TilingPattern_scaleToContext() { + var scale = this.scale; + this.ctx.scale(1 / scale[0], 1 / scale[1]); }, - shadingFill: function CanvasGraphics_shadingFill(patternIR) { - var ctx = this.ctx; + clipBbox: function clipBbox(graphics, bbox, x0, y0, x1, y1) { + if (bbox && isArray(bbox) && bbox.length === 4) { + var bboxWidth = x1 - x0; + var bboxHeight = y1 - y0; + graphics.ctx.rect(x0, y0, bboxWidth, bboxHeight); + graphics.clip(); + graphics.endPath(); + } + }, - this.save(); - var pattern = getShadingPatternFromIR(patternIR); - ctx.fillStyle = pattern.getPattern(ctx, this, true); + setFillAndStrokeStyleToContext: + function setFillAndStrokeStyleToContext(context, paintType, color) { + switch (paintType) { + case PaintType.COLORED: + var ctx = this.ctx; + context.fillStyle = ctx.fillStyle; + context.strokeStyle = ctx.strokeStyle; + break; + case PaintType.UNCOLORED: + var cssColor = Util.makeCssRgb(color[0], color[1], color[2]); + context.fillStyle = cssColor; + context.strokeStyle = cssColor; + break; + default: + error('Unsupported paint type: ' + paintType); + } + }, - var inv = ctx.mozCurrentTransformInverse; - if (inv) { - var canvas = ctx.canvas; - var width = canvas.width; - var height = canvas.height; + getPattern: function TilingPattern_getPattern(ctx, owner) { + var temporaryPatternCanvas = this.createPatternCanvas(owner); - var bl = Util.applyTransform([0, 0], inv); - var br = Util.applyTransform([0, height], inv); - var ul = Util.applyTransform([width, 0], inv); - var ur = Util.applyTransform([width, height], inv); + ctx = this.ctx; + ctx.setTransform.apply(ctx, this.baseTransform); + ctx.transform.apply(ctx, this.matrix); + this.scaleToContext(); - var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); - var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); - var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); - var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); + return ctx.createPattern(temporaryPatternCanvas, 'repeat'); + } + }; - this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); - } else { - // HACK to draw the gradient onto an infinite rectangle. - // PDF gradients are drawn across the entire image while - // Canvas only allows gradients to be drawn in a rectangle - // The following bug should allow us to remove this. - // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 + return TilingPattern; +})(); - this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); - } +exports.getShadingPatternFromIR = getShadingPatternFromIR; +exports.TilingPattern = TilingPattern; +})); - this.restore(); - }, - // Images - beginInlineImage: function CanvasGraphics_beginInlineImage() { - error('Should not call beginInlineImage'); - }, - beginImageData: function CanvasGraphics_beginImageData() { - error('Should not call beginImageData'); - }, +(function (root, factory) { + { + factory((root.pdfjsDisplayCanvas = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayPatternHelper, root.pdfjsDisplayWebGL); + } +}(this, function (exports, sharedUtil, displayPatternHelper, displayWebGL) { - paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, - bbox) { - this.save(); - this.baseTransformStack.push(this.baseTransform); +var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; +var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; +var ImageKind = sharedUtil.ImageKind; +var OPS = sharedUtil.OPS; +var TextRenderingMode = sharedUtil.TextRenderingMode; +var Uint32ArrayView = sharedUtil.Uint32ArrayView; +var Util = sharedUtil.Util; +var assert = sharedUtil.assert; +var info = sharedUtil.info; +var isNum = sharedUtil.isNum; +var isArray = sharedUtil.isArray; +var error = sharedUtil.error; +var shadow = sharedUtil.shadow; +var warn = sharedUtil.warn; +var TilingPattern = displayPatternHelper.TilingPattern; +var getShadingPatternFromIR = displayPatternHelper.getShadingPatternFromIR; +var WebGLUtils = displayWebGL.WebGLUtils; - if (isArray(matrix) && 6 === matrix.length) { - this.transform.apply(this, matrix); - } +// contexts store most of the state we need natively. +// However, PDF needs a bit more state, which we store here. - this.baseTransform = this.ctx.mozCurrentTransform; +// Minimal font size that would be used during canvas fillText operations. +var MIN_FONT_SIZE = 16; +// Maximum font size that would be used during canvas fillText operations. +var MAX_FONT_SIZE = 100; +var MAX_GROUP_SIZE = 4096; - if (isArray(bbox) && 4 === bbox.length) { - var width = bbox[2] - bbox[0]; - var height = bbox[3] - bbox[1]; - this.ctx.rect(bbox[0], bbox[1], width, height); - this.clip(); - this.endPath(); - } - }, +// Heuristic value used when enforcing minimum line widths. +var MIN_WIDTH_FACTOR = 0.65; - paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { - this.restore(); - this.baseTransform = this.baseTransformStack.pop(); - }, +var COMPILE_TYPE3_GLYPHS = true; +var MAX_SIZE_TO_COMPILE = 1000; - beginGroup: function CanvasGraphics_beginGroup(group) { - this.save(); - var currentCtx = this.ctx; - // TODO non-isolated groups - according to Rik at adobe non-isolated - // group results aren't usually that different and they even have tools - // that ignore this setting. Notes from Rik on implmenting: - // - When you encounter an transparency group, create a new canvas with - // the dimensions of the bbox - // - copy the content from the previous canvas to the new canvas - // - draw as usual - // - remove the backdrop alpha: - // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha - // value of your transparency group and 'alphaBackdrop' the alpha of the - // backdrop - // - remove background color: - // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) - if (!group.isolated) { - info('TODO: Support non-isolated groups.'); - } +var FULL_CHUNK_HEIGHT = 16; - // TODO knockout - supposedly possible with the clever use of compositing - // modes. - if (group.knockout) { - warn('Knockout groups not supported.'); - } +function createScratchCanvas(width, height) { + var canvas = document.createElement('canvas'); + canvas.width = width; + canvas.height = height; + return canvas; +} - var currentTransform = currentCtx.mozCurrentTransform; - if (group.matrix) { - currentCtx.transform.apply(currentCtx, group.matrix); - } - assert(group.bbox, 'Bounding box is required.'); +function addContextCurrentTransform(ctx) { + // If the context doesn't expose a `mozCurrentTransform`, add a JS based one. + if (!ctx.mozCurrentTransform) { + ctx._originalSave = ctx.save; + ctx._originalRestore = ctx.restore; + ctx._originalRotate = ctx.rotate; + ctx._originalScale = ctx.scale; + ctx._originalTranslate = ctx.translate; + ctx._originalTransform = ctx.transform; + ctx._originalSetTransform = ctx.setTransform; - // Based on the current transform figure out how big the bounding box - // will actually be. - var bounds = Util.getAxialAlignedBoundingBox( - group.bbox, - currentCtx.mozCurrentTransform); - // Clip the bounding box to the current canvas. - var canvasBounds = [0, - 0, - currentCtx.canvas.width, - currentCtx.canvas.height]; - bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; - // Use ceil in case we're between sizes so we don't create canvas that is - // too small and make the canvas at least 1x1 pixels. - var offsetX = Math.floor(bounds[0]); - var offsetY = Math.floor(bounds[1]); - var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); - var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); - var scaleX = 1, scaleY = 1; - if (drawnWidth > MAX_GROUP_SIZE) { - scaleX = drawnWidth / MAX_GROUP_SIZE; - drawnWidth = MAX_GROUP_SIZE; - } - if (drawnHeight > MAX_GROUP_SIZE) { - scaleY = drawnHeight / MAX_GROUP_SIZE; - drawnHeight = MAX_GROUP_SIZE; - } + ctx._transformMatrix = ctx._transformMatrix || [1, 0, 0, 1, 0, 0]; + ctx._transformStack = []; - var cacheId = 'groupAt' + this.groupLevel; - if (group.smask) { - // Using two cache entries is case if masks are used one after another. - cacheId += '_smask_' + ((this.smaskCounter++) % 2); + Object.defineProperty(ctx, 'mozCurrentTransform', { + get: function getCurrentTransform() { + return this._transformMatrix; } - var scratchCanvas = this.cachedCanvases.getCanvas( - cacheId, drawnWidth, drawnHeight, true); - var groupCtx = scratchCanvas.context; + }); - // Since we created a new canvas that is just the size of the bounding box - // we have to translate the group ctx. - groupCtx.scale(1 / scaleX, 1 / scaleY); - groupCtx.translate(-offsetX, -offsetY); - groupCtx.transform.apply(groupCtx, currentTransform); + Object.defineProperty(ctx, 'mozCurrentTransformInverse', { + get: function getCurrentTransformInverse() { + // Calculation done using WolframAlpha: + // http://www.wolframalpha.com/input/? + // i=Inverse+{{a%2C+c%2C+e}%2C+{b%2C+d%2C+f}%2C+{0%2C+0%2C+1}} - if (group.smask) { - // Saving state and cached mask to be used in setGState. - this.smaskStack.push({ - canvas: scratchCanvas.canvas, - context: groupCtx, - offsetX: offsetX, - offsetY: offsetY, - scaleX: scaleX, - scaleY: scaleY, - subtype: group.smask.subtype, - backdrop: group.smask.backdrop, - transferMap: group.smask.transferMap || null - }); - } else { - // Setup the current ctx so when the group is popped we draw it at the - // right location. - currentCtx.setTransform(1, 0, 0, 1, 0, 0); - currentCtx.translate(offsetX, offsetY); - currentCtx.scale(scaleX, scaleY); - } - // The transparency group inherits all off the current graphics state - // except the blend mode, soft mask, and alpha constants. - copyCtxState(currentCtx, groupCtx); - this.ctx = groupCtx; - this.setGState([ - ['BM', 'Normal'], - ['ca', 1], - ['CA', 1] - ]); - this.groupStack.push(currentCtx); - this.groupLevel++; - }, + var m = this._transformMatrix; + var a = m[0], b = m[1], c = m[2], d = m[3], e = m[4], f = m[5]; - endGroup: function CanvasGraphics_endGroup(group) { - this.groupLevel--; - var groupCtx = this.ctx; - this.ctx = this.groupStack.pop(); - // Turn off image smoothing to avoid sub pixel interpolation which can - // look kind of blurry for some pdfs. - if (this.ctx.imageSmoothingEnabled !== undefined) { - this.ctx.imageSmoothingEnabled = false; - } else { - this.ctx.mozImageSmoothingEnabled = false; - } - if (group.smask) { - this.tempSMask = this.smaskStack.pop(); - } else { - this.ctx.drawImage(groupCtx.canvas, 0, 0); + var ad_bc = a * d - b * c; + var bc_ad = b * c - a * d; + + return [ + d / ad_bc, + b / bc_ad, + c / bc_ad, + a / ad_bc, + (d * e - c * f) / bc_ad, + (b * e - a * f) / ad_bc + ]; } - this.restore(); - }, + }); - beginAnnotations: function CanvasGraphics_beginAnnotations() { - this.save(); - this.current = new CanvasExtraState(); + ctx.save = function ctxSave() { + var old = this._transformMatrix; + this._transformStack.push(old); + this._transformMatrix = old.slice(0, 6); - if (this.baseTransform) { - this.ctx.setTransform.apply(this.ctx, this.baseTransform); + this._originalSave(); + }; + + ctx.restore = function ctxRestore() { + var prev = this._transformStack.pop(); + if (prev) { + this._transformMatrix = prev; + this._originalRestore(); } - }, + }; - endAnnotations: function CanvasGraphics_endAnnotations() { - this.restore(); - }, + ctx.translate = function ctxTranslate(x, y) { + var m = this._transformMatrix; + m[4] = m[0] * x + m[2] * y + m[4]; + m[5] = m[1] * x + m[3] * y + m[5]; - beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, - matrix) { - this.save(); + this._originalTranslate(x, y); + }; - if (isArray(rect) && 4 === rect.length) { - var width = rect[2] - rect[0]; - var height = rect[3] - rect[1]; - this.ctx.rect(rect[0], rect[1], width, height); - this.clip(); - this.endPath(); - } + ctx.scale = function ctxScale(x, y) { + var m = this._transformMatrix; + m[0] = m[0] * x; + m[1] = m[1] * x; + m[2] = m[2] * y; + m[3] = m[3] * y; - this.transform.apply(this, transform); - this.transform.apply(this, matrix); - }, + this._originalScale(x, y); + }; - endAnnotation: function CanvasGraphics_endAnnotation() { - this.restore(); - }, + ctx.transform = function ctxTransform(a, b, c, d, e, f) { + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * a + m[2] * b, + m[1] * a + m[3] * b, + m[0] * c + m[2] * d, + m[1] * c + m[3] * d, + m[0] * e + m[2] * f + m[4], + m[1] * e + m[3] * f + m[5] + ]; - paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { - var domImage = this.objs.get(objId); - if (!domImage) { - warn('Dependent image isn\'t ready yet'); - return; - } + ctx._originalTransform(a, b, c, d, e, f); + }; - this.save(); + ctx.setTransform = function ctxSetTransform(a, b, c, d, e, f) { + this._transformMatrix = [a, b, c, d, e, f]; - var ctx = this.ctx; - // scale the image to the unit square - ctx.scale(1 / w, -1 / h); + ctx._originalSetTransform(a, b, c, d, e, f); + }; - ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, - 0, -h, w, h); - if (this.imageLayer) { - var currentTransform = ctx.mozCurrentTransformInverse; - var position = this.getCanvasPosition(0, 0); - this.imageLayer.appendImage({ - objId: objId, - left: position[0], - top: position[1], - width: w / currentTransform[0], - height: h / currentTransform[3] - }); - } - this.restore(); - }, + ctx.rotate = function ctxRotate(angle) { + var cosValue = Math.cos(angle); + var sinValue = Math.sin(angle); - paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { - var ctx = this.ctx; - var width = img.width, height = img.height; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; + var m = this._transformMatrix; + this._transformMatrix = [ + m[0] * cosValue + m[2] * sinValue, + m[1] * cosValue + m[3] * sinValue, + m[0] * (-sinValue) + m[2] * cosValue, + m[1] * (-sinValue) + m[3] * cosValue, + m[4], + m[5] + ]; - var glyph = this.processingType3; + this._originalRotate(angle); + }; + } +} - if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) { - if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { - glyph.compiled = - compileType3Glyph({data: img.data, width: width, height: height}); - } else { - glyph.compiled = null; +var CachedCanvases = (function CachedCanvasesClosure() { + function CachedCanvases() { + this.cache = Object.create(null); + } + CachedCanvases.prototype = { + getCanvas: function CachedCanvases_getCanvas(id, width, height, + trackTransform) { + var canvasEntry; + if (this.cache[id] !== undefined) { + canvasEntry = this.cache[id]; + canvasEntry.canvas.width = width; + canvasEntry.canvas.height = height; + // reset canvas transform for emulated mozCurrentTransform, if needed + canvasEntry.context.setTransform(1, 0, 0, 1, 0, 0); + } else { + var canvas = createScratchCanvas(width, height); + var ctx = canvas.getContext('2d'); + if (trackTransform) { + addContextCurrentTransform(ctx); } + this.cache[id] = canvasEntry = {canvas: canvas, context: ctx}; + } + return canvasEntry; + }, + clear: function () { + for (var id in this.cache) { + var canvasEntry = this.cache[id]; + // Zeroing the width and height causes Firefox to release graphics + // resources immediately, which can greatly reduce memory consumption. + canvasEntry.canvas.width = 0; + canvasEntry.canvas.height = 0; + delete this.cache[id]; } + } + }; + return CachedCanvases; +})(); + +function compileType3Glyph(imgData) { + var POINT_TO_PROCESS_LIMIT = 1000; + + var width = imgData.width, height = imgData.height; + var i, j, j0, width1 = width + 1; + var points = new Uint8Array(width1 * (height + 1)); + var POINT_TYPES = + new Uint8Array([0, 2, 4, 0, 1, 0, 5, 4, 8, 10, 0, 8, 0, 2, 1, 0]); + + // decodes bit-packed mask data + var lineSize = (width + 7) & ~7, data0 = imgData.data; + var data = new Uint8Array(lineSize * height), pos = 0, ii; + for (i = 0, ii = data0.length; i < ii; i++) { + var mask = 128, elem = data0[i]; + while (mask > 0) { + data[pos++] = (elem & mask) ? 0 : 255; + mask >>= 1; + } + } - if (glyph && glyph.compiled) { - glyph.compiled(ctx); - return; + // finding iteresting points: every point is located between mask pixels, + // so there will be points of the (width + 1)x(height + 1) grid. Every point + // will have flags assigned based on neighboring mask pixels: + // 4 | 8 + // --P-- + // 2 | 1 + // We are interested only in points with the flags: + // - outside corners: 1, 2, 4, 8; + // - inside corners: 7, 11, 13, 14; + // - and, intersections: 5, 10. + var count = 0; + pos = 0; + if (data[pos] !== 0) { + points[0] = 1; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j] = data[pos] ? 2 : 1; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j] = 2; + ++count; + } + for (i = 1; i < height; i++) { + pos = i * lineSize; + j0 = i * width1; + if (data[pos - lineSize] !== data[pos]) { + points[j0] = data[pos] ? 1 : 8; + ++count; + } + // 'sum' is the position of the current pixel configuration in the 'TYPES' + // array (in order 8-1-2-4, so we can use '>>2' to shift the column). + var sum = (data[pos] ? 4 : 0) + (data[pos - lineSize] ? 8 : 0); + for (j = 1; j < width; j++) { + sum = (sum >> 2) + (data[pos + 1] ? 4 : 0) + + (data[pos - lineSize + 1] ? 8 : 0); + if (POINT_TYPES[sum]) { + points[j0 + j] = POINT_TYPES[sum]; + ++count; } + pos++; + } + if (data[pos - lineSize] !== data[pos]) { + points[j0 + j] = data[pos] ? 2 : 4; + ++count; + } - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); - - putBinaryImageMask(maskCtx, img); - - maskCtx.globalCompositeOperation = 'source-in'; + if (count > POINT_TO_PROCESS_LIMIT) { + return null; + } + } - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); + pos = lineSize * (height - 1); + j0 = i * width1; + if (data[pos] !== 0) { + points[j0] = 8; + ++count; + } + for (j = 1; j < width; j++) { + if (data[pos] !== data[pos + 1]) { + points[j0 + j] = data[pos] ? 4 : 8; + ++count; + } + pos++; + } + if (data[pos] !== 0) { + points[j0 + j] = 4; + ++count; + } + if (count > POINT_TO_PROCESS_LIMIT) { + return null; + } - maskCtx.restore(); + // building outlines + var steps = new Int32Array([0, width1, -1, 0, -width1, 0, 0, 0, 1]); + var outlines = []; + for (i = 0; count && i <= height; i++) { + var p = i * width1; + var end = p + width; + while (p < end && !points[p]) { + p++; + } + if (p === end) { + continue; + } + var coords = [p % width1, i]; - this.paintInlineImageXObject(maskCanvas.canvas); - }, + var type = points[p], p0 = p, pp; + do { + var step = steps[type]; + do { + p += step; + } while (!points[p]); - paintImageMaskXObjectRepeat: - function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, - scaleY, positions) { - var width = imgData.width; - var height = imgData.height; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; + pp = points[p]; + if (pp !== 5 && pp !== 10) { + // set new direction + type = pp; + // delete mark + points[p] = 0; + } else { // type is 5 or 10, ie, a crossing + // set new direction + type = pp & ((0x33 * type) >> 4); + // set new type for "future hit" + points[p] &= (type >> 2 | type << 2); + } - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); + coords.push(p % width1); + coords.push((p / width1) | 0); + --count; + } while (p0 !== p); + outlines.push(coords); + --i; + } - putBinaryImageMask(maskCtx, imgData); + var drawOutline = function(c) { + c.save(); + // the path shall be painted in [0..1]x[0..1] space + c.scale(1 / width, -1 / height); + c.translate(0, -height); + c.beginPath(); + for (var i = 0, ii = outlines.length; i < ii; i++) { + var o = outlines[i]; + c.moveTo(o[0], o[1]); + for (var j = 2, jj = o.length; j < jj; j += 2) { + c.lineTo(o[j], o[j+1]); + } + } + c.fill(); + c.beginPath(); + c.restore(); + }; - maskCtx.globalCompositeOperation = 'source-in'; + return drawOutline; +} - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); +var CanvasExtraState = (function CanvasExtraStateClosure() { + function CanvasExtraState(old) { + // Are soft masks and alpha values shapes or opacities? + this.alphaIsShape = false; + this.fontSize = 0; + this.fontSizeScale = 1; + this.textMatrix = IDENTITY_MATRIX; + this.textMatrixScale = 1; + this.fontMatrix = FONT_IDENTITY_MATRIX; + this.leading = 0; + // Current point (in user coordinates) + this.x = 0; + this.y = 0; + // Start of text line (in text coordinates) + this.lineX = 0; + this.lineY = 0; + // Character and word spacing + this.charSpacing = 0; + this.wordSpacing = 0; + this.textHScale = 1; + this.textRenderingMode = TextRenderingMode.FILL; + this.textRise = 0; + // Default fore and background colors + this.fillColor = '#000000'; + this.strokeColor = '#000000'; + this.patternFill = false; + // Note: fill alpha applies to all non-stroking operations + this.fillAlpha = 1; + this.strokeAlpha = 1; + this.lineWidth = 1; + this.activeSMask = null; // nonclonable field (see the save method below) - maskCtx.restore(); + this.old = old; + } - var ctx = this.ctx; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - ctx.save(); - ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); - } + CanvasExtraState.prototype = { + clone: function CanvasExtraState_clone() { + return Object.create(this); }, + setCurrentPoint: function CanvasExtraState_setCurrentPoint(x, y) { + this.x = x; + this.y = y; + } + }; + return CanvasExtraState; +})(); - paintImageMaskXObjectGroup: - function CanvasGraphics_paintImageMaskXObjectGroup(images) { - var ctx = this.ctx; +var CanvasGraphics = (function CanvasGraphicsClosure() { + // Defines the time the executeOperatorList is going to be executing + // before it stops and shedules a continue of execution. + var EXECUTION_TIME = 15; + // Defines the number of steps before checking the execution time + var EXECUTION_STEPS = 10; - var fillColor = this.current.fillColor; - var isPatternFill = this.current.patternFill; - for (var i = 0, ii = images.length; i < ii; i++) { - var image = images[i]; - var width = image.width, height = image.height; + function CanvasGraphics(canvasCtx, commonObjs, objs, imageLayer) { + this.ctx = canvasCtx; + this.current = new CanvasExtraState(); + this.stateStack = []; + this.pendingClip = null; + this.pendingEOFill = false; + this.res = null; + this.xobjs = null; + this.commonObjs = commonObjs; + this.objs = objs; + this.imageLayer = imageLayer; + this.groupStack = []; + this.processingType3 = null; + // Patterns are painted relative to the initial page/form transform, see pdf + // spec 8.7.2 NOTE 1. + this.baseTransform = null; + this.baseTransformStack = []; + this.groupLevel = 0; + this.smaskStack = []; + this.smaskCounter = 0; + this.tempSMask = null; + this.cachedCanvases = new CachedCanvases(); + if (canvasCtx) { + // NOTE: if mozCurrentTransform is polyfilled, then the current state of + // the transformation must already be set in canvasCtx._transformMatrix. + addContextCurrentTransform(canvasCtx); + } + this.cachedGetSinglePixelWidth = null; + } - var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', - width, height); - var maskCtx = maskCanvas.context; - maskCtx.save(); + function putBinaryImageData(ctx, imgData) { + if (typeof ImageData !== 'undefined' && imgData instanceof ImageData) { + ctx.putImageData(imgData, 0, 0); + return; + } - putBinaryImageMask(maskCtx, image); + // Put the image data to the canvas in chunks, rather than putting the + // whole image at once. This saves JS memory, because the ImageData object + // is smaller. It also possibly saves C++ memory within the implementation + // of putImageData(). (E.g. in Firefox we make two short-lived copies of + // the data passed to putImageData()). |n| shouldn't be too small, however, + // because too many putImageData() calls will slow things down. + // + // Note: as written, if the last chunk is partial, the putImageData() call + // will (conceptually) put pixels past the bounds of the canvas. But + // that's ok; any such pixels are ignored. - maskCtx.globalCompositeOperation = 'source-in'; + var height = imgData.height, width = imgData.width; + var partialChunkHeight = height % FULL_CHUNK_HEIGHT; + var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; + var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; - maskCtx.fillStyle = isPatternFill ? - fillColor.getPattern(maskCtx, this) : fillColor; - maskCtx.fillRect(0, 0, width, height); + var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); + var srcPos = 0, destPos; + var src = imgData.data; + var dest = chunkImgData.data; + var i, j, thisChunkHeight, elemsInThisChunk; - maskCtx.restore(); + // There are multiple forms in which the pixel data can be passed, and + // imgData.kind tells us which one this is. + if (imgData.kind === ImageKind.GRAYSCALE_1BPP) { + // Grayscale, 1 bit per pixel (i.e. black-and-white). + var srcLength = src.byteLength; + var dest32 = PDFJS.hasCanvasTypedArrays ? new Uint32Array(dest.buffer) : + new Uint32ArrayView(dest); + var dest32DataLength = dest32.length; + var fullSrcDiff = (width + 7) >> 3; + var white = 0xFFFFFFFF; + var black = (PDFJS.isLittleEndian || !PDFJS.hasCanvasTypedArrays) ? + 0xFF000000 : 0x000000FF; + for (i = 0; i < totalChunks; i++) { + thisChunkHeight = + (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; + destPos = 0; + for (j = 0; j < thisChunkHeight; j++) { + var srcDiff = srcLength - srcPos; + var k = 0; + var kEnd = (srcDiff > fullSrcDiff) ? width : srcDiff * 8 - 7; + var kEndUnrolled = kEnd & ~7; + var mask = 0; + var srcByte = 0; + for (; k < kEndUnrolled; k += 8) { + srcByte = src[srcPos++]; + dest32[destPos++] = (srcByte & 128) ? white : black; + dest32[destPos++] = (srcByte & 64) ? white : black; + dest32[destPos++] = (srcByte & 32) ? white : black; + dest32[destPos++] = (srcByte & 16) ? white : black; + dest32[destPos++] = (srcByte & 8) ? white : black; + dest32[destPos++] = (srcByte & 4) ? white : black; + dest32[destPos++] = (srcByte & 2) ? white : black; + dest32[destPos++] = (srcByte & 1) ? white : black; + } + for (; k < kEnd; k++) { + if (mask === 0) { + srcByte = src[srcPos++]; + mask = 128; + } - ctx.save(); - ctx.transform.apply(ctx, image.transform); - ctx.scale(1, -1); - ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, - 0, -1, 1, 1); - ctx.restore(); - } - }, + dest32[destPos++] = (srcByte & mask) ? white : black; + mask >>= 1; + } + } + // We ran out of input. Make all remaining pixels transparent. + while (destPos < dest32DataLength) { + dest32[destPos++] = 0; + } - paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); } + } else if (imgData.kind === ImageKind.RGBA_32BPP) { + // RGBA, 32-bits per pixel. - this.paintInlineImageXObject(imgData); - }, - - paintImageXObjectRepeat: - function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, - positions) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); - return; - } + j = 0; + elemsInThisChunk = width * FULL_CHUNK_HEIGHT * 4; + for (i = 0; i < fullChunks; i++) { + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + srcPos += elemsInThisChunk; - var width = imgData.width; - var height = imgData.height; - var map = []; - for (var i = 0, ii = positions.length; i < ii; i += 2) { - map.push({transform: [scaleX, 0, 0, scaleY, positions[i], - positions[i + 1]], x: 0, y: 0, w: width, h: height}); + ctx.putImageData(chunkImgData, 0, j); + j += FULL_CHUNK_HEIGHT; } - this.paintInlineImageXObjectGroup(imgData, map); - }, - - paintInlineImageXObject: - function CanvasGraphics_paintInlineImageXObject(imgData) { - var width = imgData.width; - var height = imgData.height; - var ctx = this.ctx; - - this.save(); - // scale the image to the unit square - ctx.scale(1 / width, -1 / height); - - var currentTransform = ctx.mozCurrentTransformInverse; - var a = currentTransform[0], b = currentTransform[1]; - var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); - var c = currentTransform[2], d = currentTransform[3]; - var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); - - var imgToPaint, tmpCanvas; - // instanceof HTMLElement does not work in jsdom node.js module - if (imgData instanceof HTMLElement || !imgData.data) { - imgToPaint = imgData; - } else { - tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', - width, height); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); - imgToPaint = tmpCanvas.canvas; + if (i < totalChunks) { + elemsInThisChunk = width * partialChunkHeight * 4; + dest.set(src.subarray(srcPos, srcPos + elemsInThisChunk)); + ctx.putImageData(chunkImgData, 0, j); } - var paintWidth = width, paintHeight = height; - var tmpCanvasId = 'prescale1'; - // Vertial or horizontal scaling shall not be more than 2 to not loose the - // pixels during drawImage operation, painting on the temporary canvas(es) - // that are twice smaller in size - while ((widthScale > 2 && paintWidth > 1) || - (heightScale > 2 && paintHeight > 1)) { - var newWidth = paintWidth, newHeight = paintHeight; - if (widthScale > 2 && paintWidth > 1) { - newWidth = Math.ceil(paintWidth / 2); - widthScale /= paintWidth / newWidth; - } - if (heightScale > 2 && paintHeight > 1) { - newHeight = Math.ceil(paintHeight / 2); - heightScale /= paintHeight / newHeight; + } else if (imgData.kind === ImageKind.RGB_24BPP) { + // RGB, 24-bits per pixel. + thisChunkHeight = FULL_CHUNK_HEIGHT; + elemsInThisChunk = width * thisChunkHeight; + for (i = 0; i < totalChunks; i++) { + if (i >= fullChunks) { + thisChunkHeight = partialChunkHeight; + elemsInThisChunk = width * thisChunkHeight; } - tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, - newWidth, newHeight); - tmpCtx = tmpCanvas.context; - tmpCtx.clearRect(0, 0, newWidth, newHeight); - tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, 0, newWidth, newHeight); - imgToPaint = tmpCanvas.canvas; - paintWidth = newWidth; - paintHeight = newHeight; - tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; - } - ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, - 0, -height, width, height); - if (this.imageLayer) { - var position = this.getCanvasPosition(0, -height); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: width / currentTransform[0], - height: height / currentTransform[3] - }); + destPos = 0; + for (j = elemsInThisChunk; j--;) { + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = src[srcPos++]; + dest[destPos++] = 255; + } + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); } - this.restore(); - }, + } else { + error('bad image kind: ' + imgData.kind); + } + } - paintInlineImageXObjectGroup: - function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { - var ctx = this.ctx; - var w = imgData.width; - var h = imgData.height; + function putBinaryImageMask(ctx, imgData) { + var height = imgData.height, width = imgData.width; + var partialChunkHeight = height % FULL_CHUNK_HEIGHT; + var fullChunks = (height - partialChunkHeight) / FULL_CHUNK_HEIGHT; + var totalChunks = partialChunkHeight === 0 ? fullChunks : fullChunks + 1; - var tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', w, h); - var tmpCtx = tmpCanvas.context; - putBinaryImageData(tmpCtx, imgData); + var chunkImgData = ctx.createImageData(width, FULL_CHUNK_HEIGHT); + var srcPos = 0; + var src = imgData.data; + var dest = chunkImgData.data; - for (var i = 0, ii = map.length; i < ii; i++) { - var entry = map[i]; - ctx.save(); - ctx.transform.apply(ctx, entry.transform); - ctx.scale(1, -1); - ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, - 0, -1, 1, 1); - if (this.imageLayer) { - var position = this.getCanvasPosition(entry.x, entry.y); - this.imageLayer.appendImage({ - imgData: imgData, - left: position[0], - top: position[1], - width: w, - height: h - }); + for (var i = 0; i < totalChunks; i++) { + var thisChunkHeight = + (i < fullChunks) ? FULL_CHUNK_HEIGHT : partialChunkHeight; + + // Expand the mask so it can be used by the canvas. Any required + // inversion has already been handled. + var destPos = 3; // alpha component offset + for (var j = 0; j < thisChunkHeight; j++) { + var mask = 0; + for (var k = 0; k < width; k++) { + if (!mask) { + var elem = src[srcPos++]; + mask = 128; + } + dest[destPos] = (elem & mask) ? 0 : 255; + destPos += 4; + mask >>= 1; } - ctx.restore(); } - }, + ctx.putImageData(chunkImgData, 0, i * FULL_CHUNK_HEIGHT); + } + } - paintSolidColorImageMask: - function CanvasGraphics_paintSolidColorImageMask() { - this.ctx.fillRect(0, 0, 1, 1); - }, + function copyCtxState(sourceCtx, destCtx) { + var properties = ['strokeStyle', 'fillStyle', 'fillRule', 'globalAlpha', + 'lineWidth', 'lineCap', 'lineJoin', 'miterLimit', + 'globalCompositeOperation', 'font']; + for (var i = 0, ii = properties.length; i < ii; i++) { + var property = properties[i]; + if (sourceCtx[property] !== undefined) { + destCtx[property] = sourceCtx[property]; + } + } + if (sourceCtx.setLineDash !== undefined) { + destCtx.setLineDash(sourceCtx.getLineDash()); + destCtx.lineDashOffset = sourceCtx.lineDashOffset; + } else if (sourceCtx.mozDashOffset !== undefined) { + destCtx.mozDash = sourceCtx.mozDash; + destCtx.mozDashOffset = sourceCtx.mozDashOffset; + } + } - paintXObject: function CanvasGraphics_paintXObject() { - warn('Unsupported \'paintXObject\' command.'); - }, + function composeSMaskBackdrop(bytes, r0, g0, b0) { + var length = bytes.length; + for (var i = 3; i < length; i += 4) { + var alpha = bytes[i]; + if (alpha === 0) { + bytes[i - 3] = r0; + bytes[i - 2] = g0; + bytes[i - 1] = b0; + } else if (alpha < 255) { + var alpha_ = 255 - alpha; + bytes[i - 3] = (bytes[i - 3] * alpha + r0 * alpha_) >> 8; + bytes[i - 2] = (bytes[i - 2] * alpha + g0 * alpha_) >> 8; + bytes[i - 1] = (bytes[i - 1] * alpha + b0 * alpha_) >> 8; + } + } + } - // Marked content + function composeSMaskAlpha(maskData, layerData, transferMap) { + var length = maskData.length; + var scale = 1 / 255; + for (var i = 3; i < length; i += 4) { + var alpha = transferMap ? transferMap[maskData[i]] : maskData[i]; + layerData[i] = (layerData[i] * alpha * scale) | 0; + } + } - markPoint: function CanvasGraphics_markPoint(tag) { - // TODO Marked content. - }, - markPointProps: function CanvasGraphics_markPointProps(tag, properties) { - // TODO Marked content. - }, - beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { - // TODO Marked content. - }, - beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( - tag, properties) { - // TODO Marked content. - }, - endMarkedContent: function CanvasGraphics_endMarkedContent() { - // TODO Marked content. - }, + function composeSMaskLuminosity(maskData, layerData, transferMap) { + var length = maskData.length; + for (var i = 3; i < length; i += 4) { + var y = (maskData[i - 3] * 77) + // * 0.3 / 255 * 0x10000 + (maskData[i - 2] * 152) + // * 0.59 .... + (maskData[i - 1] * 28); // * 0.11 .... + layerData[i] = transferMap ? + (layerData[i] * transferMap[y >> 8]) >> 8 : + (layerData[i] * y) >> 16; + } + } - // Compatibility + function genericComposeSMask(maskCtx, layerCtx, width, height, + subtype, backdrop, transferMap) { + var hasBackdrop = !!backdrop; + var r0 = hasBackdrop ? backdrop[0] : 0; + var g0 = hasBackdrop ? backdrop[1] : 0; + var b0 = hasBackdrop ? backdrop[2] : 0; - beginCompat: function CanvasGraphics_beginCompat() { - // TODO ignore undefined operators (should we do that anyway?) - }, - endCompat: function CanvasGraphics_endCompat() { - // TODO stop ignoring undefined operators - }, + var composeFn; + if (subtype === 'Luminosity') { + composeFn = composeSMaskLuminosity; + } else { + composeFn = composeSMaskAlpha; + } - // Helper functions + // processing image in chunks to save memory + var PIXELS_TO_PROCESS = 1048576; + var chunkSize = Math.min(height, Math.ceil(PIXELS_TO_PROCESS / width)); + for (var row = 0; row < height; row += chunkSize) { + var chunkHeight = Math.min(chunkSize, height - row); + var maskData = maskCtx.getImageData(0, row, width, chunkHeight); + var layerData = layerCtx.getImageData(0, row, width, chunkHeight); - consumePath: function CanvasGraphics_consumePath() { - var ctx = this.ctx; - if (this.pendingClip) { - if (this.pendingClip === EO_CLIP) { - if (ctx.mozFillRule !== undefined) { - ctx.mozFillRule = 'evenodd'; - ctx.clip(); - ctx.mozFillRule = 'nonzero'; - } else { - ctx.clip('evenodd'); - } - } else { - ctx.clip(); - } - this.pendingClip = null; - } - ctx.beginPath(); - }, - getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { - if (this.cachedGetSinglePixelWidth === null) { - var inverse = this.ctx.mozCurrentTransformInverse; - // max of the current horizontal and vertical scale - this.cachedGetSinglePixelWidth = Math.sqrt(Math.max( - (inverse[0] * inverse[0] + inverse[1] * inverse[1]), - (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); + if (hasBackdrop) { + composeSMaskBackdrop(maskData.data, r0, g0, b0); } - return this.cachedGetSinglePixelWidth; - }, - getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { - var transform = this.ctx.mozCurrentTransform; - return [ - transform[0] * x + transform[2] * y + transform[4], - transform[1] * x + transform[3] * y + transform[5] - ]; + composeFn(maskData.data, layerData.data, transferMap); + + maskCtx.putImageData(layerData, 0, row); } - }; + } - for (var op in OPS) { - CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; + function composeSMask(ctx, smask, layerCtx) { + var mask = smask.canvas; + var maskCtx = smask.context; + + ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY, + smask.offsetX, smask.offsetY); + + var backdrop = smask.backdrop || null; + if (!smask.transferMap && WebGLUtils.isEnabled) { + var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask, + {subtype: smask.subtype, backdrop: backdrop}); + ctx.setTransform(1, 0, 0, 1, 0, 0); + ctx.drawImage(composed, smask.offsetX, smask.offsetY); + return; + } + genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height, + smask.subtype, backdrop, smask.transferMap); + ctx.drawImage(mask, 0, 0); } - return CanvasGraphics; -})(); + var LINE_CAP_STYLES = ['butt', 'round', 'square']; + var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; + var NORMAL_CLIP = {}; + var EO_CLIP = {}; -exports.CanvasGraphics = CanvasGraphics; -exports.createScratchCanvas = createScratchCanvas; -})); + CanvasGraphics.prototype = { + beginDrawing: function CanvasGraphics_beginDrawing(transform, viewport, + transparency) { + // For pdfs that use blend modes we have to clear the canvas else certain + // blend modes can look wrong since we'd be blending with a white + // backdrop. The problem with a transparent backdrop though is we then + // don't get sub pixel anti aliasing on text, creating temporary + // transparent canvas when we have blend modes. + var width = this.ctx.canvas.width; + var height = this.ctx.canvas.height; -(function (root, factory) { - { - factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil, - root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas, - root.pdfjsSharedGlobal); - } -}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas, - sharedGlobal, amdRequire) { + this.ctx.save(); + this.ctx.fillStyle = 'rgb(255, 255, 255)'; + this.ctx.fillRect(0, 0, width, height); + this.ctx.restore(); -var InvalidPDFException = sharedUtil.InvalidPDFException; -var MessageHandler = sharedUtil.MessageHandler; -var MissingPDFException = sharedUtil.MissingPDFException; -var PasswordResponses = sharedUtil.PasswordResponses; -var PasswordException = sharedUtil.PasswordException; -var StatTimer = sharedUtil.StatTimer; -var UnexpectedResponseException = sharedUtil.UnexpectedResponseException; -var UnknownErrorException = sharedUtil.UnknownErrorException; -var Util = sharedUtil.Util; -var createPromiseCapability = sharedUtil.createPromiseCapability; -var combineUrl = sharedUtil.combineUrl; -var error = sharedUtil.error; -var deprecated = sharedUtil.deprecated; -var info = sharedUtil.info; -var isArrayBuffer = sharedUtil.isArrayBuffer; -var loadJpegStream = sharedUtil.loadJpegStream; -var stringToBytes = sharedUtil.stringToBytes; -var warn = sharedUtil.warn; -var FontFaceObject = displayFontLoader.FontFaceObject; -var FontLoader = displayFontLoader.FontLoader; -var CanvasGraphics = displayCanvas.CanvasGraphics; -var createScratchCanvas = displayCanvas.createScratchCanvas; -var PDFJS = sharedGlobal.PDFJS; -var globalScope = sharedGlobal.globalScope; + if (transparency) { + var transparentCanvas = this.cachedCanvases.getCanvas( + 'transparent', width, height, true); + this.compositeCtx = this.ctx; + this.transparentCanvas = transparentCanvas.canvas; + this.ctx = transparentCanvas.context; + this.ctx.save(); + // The transform can be applied before rendering, transferring it to + // the new canvas. + this.ctx.transform.apply(this.ctx, + this.compositeCtx.mozCurrentTransform); + } + + this.ctx.save(); + if (transform) { + this.ctx.transform.apply(this.ctx, transform); + } + this.ctx.transform.apply(this.ctx, viewport.transform); -var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536 + this.baseTransform = this.ctx.mozCurrentTransform.slice(); + if (this.imageLayer) { + this.imageLayer.beginLayout(); + } + }, -var useRequireEnsure = false; -if (typeof module !== 'undefined' && module.require) { - // node.js - disable worker and set require.ensure. - PDFJS.disableWorker = true; - if (typeof require.ensure === 'undefined') { - require.ensure = require('node-ensure'); - } - useRequireEnsure = true; -} -if (typeof __webpack_require__ !== 'undefined') { - // Webpack - get/bundle pdf.worker.js as additional file. - PDFJS.workerSrc = require('entry?name=[hash]-worker.js!./pdf.worker.js'); - useRequireEnsure = true; -} -var fakeWorkerFilesLoader = useRequireEnsure && function (callback) { - require.ensure([], function () { - require('./pdf.worker.js'); - callback(); - }); -}; + executeOperatorList: function CanvasGraphics_executeOperatorList( + operatorList, + executionStartIdx, continueCallback, + stepper) { + var argsArray = operatorList.argsArray; + var fnArray = operatorList.fnArray; + var i = executionStartIdx || 0; + var argsArrayLen = argsArray.length; + // Sometimes the OperatorList to execute is empty. + if (argsArrayLen === i) { + return i; + } -/** - * The maximum allowed image size in total pixels e.g. width * height. Images - * above this value will not be drawn. Use -1 for no limit. - * @var {number} - */ -PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ? - -1 : PDFJS.maxImageSize); + var chunkOperations = (argsArrayLen - i > EXECUTION_STEPS && + typeof continueCallback === 'function'); + var endTime = chunkOperations ? Date.now() + EXECUTION_TIME : 0; + var steps = 0; -/** - * The url of where the predefined Adobe CMaps are located. Include trailing - * slash. - * @var {string} - */ -PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); + var commonObjs = this.commonObjs; + var objs = this.objs; + var fnId; -/** - * Specifies if CMaps are binary packed. - * @var {boolean} - */ -PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; + while (true) { + if (stepper !== undefined && i === stepper.nextBreakPoint) { + stepper.breakIt(i, continueCallback); + return i; + } -/** - * By default fonts are converted to OpenType fonts and loaded via font face - * rules. If disabled, the font will be rendered using a built in font renderer - * that constructs the glyphs with primitive path commands. - * @var {boolean} - */ -PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ? - false : PDFJS.disableFontFace); + fnId = fnArray[i]; -/** - * Path for image resources, mainly for annotation icons. Include trailing - * slash. - * @var {string} - */ -PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? - '' : PDFJS.imageResourcesPath); + if (fnId !== OPS.dependency) { + this[fnId].apply(this, argsArray[i]); + } else { + var deps = argsArray[i]; + for (var n = 0, nn = deps.length; n < nn; n++) { + var depObjId = deps[n]; + var common = depObjId[0] === 'g' && depObjId[1] === '_'; + var objsPool = common ? commonObjs : objs; -/** - * Disable the web worker and run all code on the main thread. This will happen - * automatically if the browser doesn't support workers or sending typed arrays - * to workers. - * @var {boolean} - */ -PDFJS.disableWorker = (PDFJS.disableWorker === undefined ? - false : PDFJS.disableWorker); + // If the promise isn't resolved yet, add the continueCallback + // to the promise and bail out. + if (!objsPool.isResolved(depObjId)) { + objsPool.get(depObjId, continueCallback); + return i; + } + } + } -/** - * Path and filename of the worker file. Required when the worker is enabled in - * development mode. If unspecified in the production build, the worker will be - * loaded based on the location of the pdf.js file. It is recommended that - * the workerSrc is set in a custom application to prevent issues caused by - * third-party frameworks and libraries. - * @var {string} - */ -PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); + i++; -/** - * Disable range request loading of PDF files. When enabled and if the server - * supports partial content requests then the PDF will be fetched in chunks. - * Enabled (false) by default. - * @var {boolean} - */ -PDFJS.disableRange = (PDFJS.disableRange === undefined ? - false : PDFJS.disableRange); + // If the entire operatorList was executed, stop as were done. + if (i === argsArrayLen) { + return i; + } -/** - * Disable streaming of PDF file data. By default PDF.js attempts to load PDF - * in chunks. This default behavior can be disabled. - * @var {boolean} - */ -PDFJS.disableStream = (PDFJS.disableStream === undefined ? - false : PDFJS.disableStream); + // If the execution took longer then a certain amount of time and + // `continueCallback` is specified, interrupt the execution. + if (chunkOperations && ++steps > EXECUTION_STEPS) { + if (Date.now() > endTime) { + continueCallback(); + return i; + } + steps = 0; + } -/** - * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js - * will automatically keep fetching more data even if it isn't needed to display - * the current page. This default behavior can be disabled. - * - * NOTE: It is also necessary to disable streaming, see above, - * in order for disabling of pre-fetching to work correctly. - * @var {boolean} - */ -PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? - false : PDFJS.disableAutoFetch); + // If the operatorList isn't executed completely yet OR the execution + // time was short enough, do another execution round. + } + }, -/** - * Enables special hooks for debugging PDF.js. - * @var {boolean} - */ -PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); + endDrawing: function CanvasGraphics_endDrawing() { + this.ctx.restore(); -/** - * Enables transfer usage in postMessage for ArrayBuffers. - * @var {boolean} - */ -PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? - true : PDFJS.postMessageTransfers); + if (this.transparentCanvas) { + this.ctx = this.compositeCtx; + this.ctx.drawImage(this.transparentCanvas, 0, 0); + this.transparentCanvas = null; + } -/** - * Disables URL.createObjectURL usage. - * @var {boolean} - */ -PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? - false : PDFJS.disableCreateObjectURL); + this.cachedCanvases.clear(); + WebGLUtils.clear(); + + if (this.imageLayer) { + this.imageLayer.endLayout(); + } + }, + + // Graphics state + setLineWidth: function CanvasGraphics_setLineWidth(width) { + this.current.lineWidth = width; + this.ctx.lineWidth = width; + }, + setLineCap: function CanvasGraphics_setLineCap(style) { + this.ctx.lineCap = LINE_CAP_STYLES[style]; + }, + setLineJoin: function CanvasGraphics_setLineJoin(style) { + this.ctx.lineJoin = LINE_JOIN_STYLES[style]; + }, + setMiterLimit: function CanvasGraphics_setMiterLimit(limit) { + this.ctx.miterLimit = limit; + }, + setDash: function CanvasGraphics_setDash(dashArray, dashPhase) { + var ctx = this.ctx; + if (ctx.setLineDash !== undefined) { + ctx.setLineDash(dashArray); + ctx.lineDashOffset = dashPhase; + } else { + ctx.mozDash = dashArray; + ctx.mozDashOffset = dashPhase; + } + }, + setRenderingIntent: function CanvasGraphics_setRenderingIntent(intent) { + // Maybe if we one day fully support color spaces this will be important + // for now we can ignore. + // TODO set rendering intent? + }, + setFlatness: function CanvasGraphics_setFlatness(flatness) { + // There's no way to control this with canvas, but we can safely ignore. + // TODO set flatness? + }, + setGState: function CanvasGraphics_setGState(states) { + for (var i = 0, ii = states.length; i < ii; i++) { + var state = states[i]; + var key = state[0]; + var value = state[1]; + + switch (key) { + case 'LW': + this.setLineWidth(value); + break; + case 'LC': + this.setLineCap(value); + break; + case 'LJ': + this.setLineJoin(value); + break; + case 'ML': + this.setMiterLimit(value); + break; + case 'D': + this.setDash(value[0], value[1]); + break; + case 'RI': + this.setRenderingIntent(value); + break; + case 'FL': + this.setFlatness(value); + break; + case 'Font': + this.setFont(value[0], value[1]); + break; + case 'CA': + this.current.strokeAlpha = state[1]; + break; + case 'ca': + this.current.fillAlpha = state[1]; + this.ctx.globalAlpha = state[1]; + break; + case 'BM': + if (value && value.name && (value.name !== 'Normal')) { + var mode = value.name.replace(/([A-Z])/g, + function(c) { + return '-' + c.toLowerCase(); + } + ).substring(1); + this.ctx.globalCompositeOperation = mode; + if (this.ctx.globalCompositeOperation !== mode) { + warn('globalCompositeOperation "' + mode + + '" is not supported'); + } + } else { + this.ctx.globalCompositeOperation = 'source-over'; + } + break; + case 'SMask': + if (this.current.activeSMask) { + this.endSMaskGroup(); + } + this.current.activeSMask = value ? this.tempSMask : null; + if (this.current.activeSMask) { + this.beginSMaskGroup(); + } + this.tempSMask = null; + break; + } + } + }, + beginSMaskGroup: function CanvasGraphics_beginSMaskGroup() { -/** - * Disables WebGL usage. - * @var {boolean} - */ -PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? - true : PDFJS.disableWebGL); + var activeSMask = this.current.activeSMask; + var drawnWidth = activeSMask.canvas.width; + var drawnHeight = activeSMask.canvas.height; + var cacheId = 'smaskGroupAt' + this.groupLevel; + var scratchCanvas = this.cachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); -/** - * Disables fullscreen support, and by extension Presentation Mode, - * in browsers which support the fullscreen API. - * @var {boolean} - */ -PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ? - false : PDFJS.disableFullscreen); + var currentCtx = this.ctx; + var currentTransform = currentCtx.mozCurrentTransform; + this.ctx.save(); -/** - * Enables CSS only zooming. - * @var {boolean} - */ -PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? - false : PDFJS.useOnlyCssZoom); + var groupCtx = scratchCanvas.context; + groupCtx.scale(1 / activeSMask.scaleX, 1 / activeSMask.scaleY); + groupCtx.translate(-activeSMask.offsetX, -activeSMask.offsetY); + groupCtx.transform.apply(groupCtx, currentTransform); -/** - * Controls the logging level. - * The constants from PDFJS.VERBOSITY_LEVELS should be used: - * - errors - * - warnings [default] - * - infos - * @var {number} - */ -PDFJS.verbosity = (PDFJS.verbosity === undefined ? - PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity); + copyCtxState(currentCtx, groupCtx); + this.ctx = groupCtx; + this.setGState([ + ['BM', 'Normal'], + ['ca', 1], + ['CA', 1] + ]); + this.groupStack.push(currentCtx); + this.groupLevel++; + }, + endSMaskGroup: function CanvasGraphics_endSMaskGroup() { + var groupCtx = this.ctx; + this.groupLevel--; + this.ctx = this.groupStack.pop(); -/** - * The maximum supported canvas size in total pixels e.g. width * height. - * The default value is 4096 * 4096. Use -1 for no limit. - * @var {number} - */ -PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ? - 16777216 : PDFJS.maxCanvasPixels); + composeSMask(this.ctx, this.current.activeSMask, groupCtx); + this.ctx.restore(); + copyCtxState(groupCtx, this.ctx); + }, + save: function CanvasGraphics_save() { + this.ctx.save(); + var old = this.current; + this.stateStack.push(old); + this.current = old.clone(); + this.current.activeSMask = null; + }, + restore: function CanvasGraphics_restore() { + if (this.stateStack.length !== 0) { + if (this.current.activeSMask !== null) { + this.endSMaskGroup(); + } -/** - * (Deprecated) Opens external links in a new window if enabled. - * The default behavior opens external links in the PDF.js window. - * - * NOTE: This property has been deprecated, please use - * `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead. - * @var {boolean} - */ -PDFJS.openExternalLinksInNewWindow = ( - PDFJS.openExternalLinksInNewWindow === undefined ? - false : PDFJS.openExternalLinksInNewWindow); + this.current = this.stateStack.pop(); + this.ctx.restore(); -/** - * Specifies the |target| attribute for external links. - * The constants from PDFJS.LinkTarget should be used: - * - NONE [default] - * - SELF - * - BLANK - * - PARENT - * - TOP - * @var {number} - */ -PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ? - PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget); + // Ensure that the clipping path is reset (fixes issue6413.pdf). + this.pendingClip = null; -/** - * Specifies the |rel| attribute for external links. Defaults to stripping - * the referrer. - * @var {string} - */ -PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ? - 'noreferrer' : PDFJS.externalLinkRel); + this.cachedGetSinglePixelWidth = null; + } + }, + transform: function CanvasGraphics_transform(a, b, c, d, e, f) { + this.ctx.transform(a, b, c, d, e, f); -/** - * Determines if we can eval strings as JS. Primarily used to improve - * performance for font rendering. - * @var {boolean} - */ -PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ? - true : PDFJS.isEvalSupported); + this.cachedGetSinglePixelWidth = null; + }, -/** - * Document initialization / loading parameters object. - * - * @typedef {Object} DocumentInitParameters - * @property {string} url - The URL of the PDF. - * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays - * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded, - * use atob() to convert it to a binary string first. - * @property {Object} httpHeaders - Basic authentication headers. - * @property {boolean} withCredentials - Indicates whether or not cross-site - * Access-Control requests should be made using credentials such as cookies - * or authorization headers. The default is false. - * @property {string} password - For decrypting password-protected PDFs. - * @property {TypedArray} initialData - A typed array with the first portion or - * all of the pdf data. Used by the extension since some data is already - * loaded before the switch to range requests. - * @property {number} length - The PDF file length. It's used for progress - * reports and range requests operations. - * @property {PDFDataRangeTransport} range - * @property {number} rangeChunkSize - Optional parameter to specify - * maximum number of bytes fetched per range request. The default value is - * 2^16 = 65536. - * @property {PDFWorker} worker - The worker that will be used for the loading - * and parsing of the PDF data. - */ + // Path + constructPath: function CanvasGraphics_constructPath(ops, args) { + var ctx = this.ctx; + var current = this.current; + var x = current.x, y = current.y; + for (var i = 0, j = 0, ii = ops.length; i < ii; i++) { + switch (ops[i] | 0) { + case OPS.rectangle: + x = args[j++]; + y = args[j++]; + var width = args[j++]; + var height = args[j++]; + if (width === 0) { + width = this.getSinglePixelWidth(); + } + if (height === 0) { + height = this.getSinglePixelWidth(); + } + var xw = x + width; + var yh = y + height; + this.ctx.moveTo(x, y); + this.ctx.lineTo(xw, y); + this.ctx.lineTo(xw, yh); + this.ctx.lineTo(x, yh); + this.ctx.lineTo(x, y); + this.ctx.closePath(); + break; + case OPS.moveTo: + x = args[j++]; + y = args[j++]; + ctx.moveTo(x, y); + break; + case OPS.lineTo: + x = args[j++]; + y = args[j++]; + ctx.lineTo(x, y); + break; + case OPS.curveTo: + x = args[j + 4]; + y = args[j + 5]; + ctx.bezierCurveTo(args[j], args[j + 1], args[j + 2], args[j + 3], + x, y); + j += 6; + break; + case OPS.curveTo2: + ctx.bezierCurveTo(x, y, args[j], args[j + 1], + args[j + 2], args[j + 3]); + x = args[j + 2]; + y = args[j + 3]; + j += 4; + break; + case OPS.curveTo3: + x = args[j + 2]; + y = args[j + 3]; + ctx.bezierCurveTo(args[j], args[j + 1], x, y, x, y); + j += 4; + break; + case OPS.closePath: + ctx.closePath(); + break; + } + } + current.setCurrentPoint(x, y); + }, + closePath: function CanvasGraphics_closePath() { + this.ctx.closePath(); + }, + stroke: function CanvasGraphics_stroke(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var strokeColor = this.current.strokeColor; + // Prevent drawing too thin lines by enforcing a minimum line width. + ctx.lineWidth = Math.max(this.getSinglePixelWidth() * MIN_WIDTH_FACTOR, + this.current.lineWidth); + // For stroke we want to temporarily change the global alpha to the + // stroking alpha. + ctx.globalAlpha = this.current.strokeAlpha; + if (strokeColor && strokeColor.hasOwnProperty('type') && + strokeColor.type === 'Pattern') { + // for patterns, we transform to pattern space, calculate + // the pattern, call stroke, and restore to user space + ctx.save(); + ctx.strokeStyle = strokeColor.getPattern(ctx, this); + ctx.stroke(); + ctx.restore(); + } else { + ctx.stroke(); + } + if (consumePath) { + this.consumePath(); + } + // Restore the global alpha to the fill alpha + ctx.globalAlpha = this.current.fillAlpha; + }, + closeStroke: function CanvasGraphics_closeStroke() { + this.closePath(); + this.stroke(); + }, + fill: function CanvasGraphics_fill(consumePath) { + consumePath = typeof consumePath !== 'undefined' ? consumePath : true; + var ctx = this.ctx; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + var needRestore = false; -/** - * @typedef {Object} PDFDocumentStats - * @property {Array} streamTypes - Used stream types in the document (an item - * is set to true if specific stream ID was used in the document). - * @property {Array} fontTypes - Used font type in the document (an item is set - * to true if specific font ID was used in the document). - */ + if (isPatternFill) { + ctx.save(); + if (this.baseTransform) { + ctx.setTransform.apply(ctx, this.baseTransform); + } + ctx.fillStyle = fillColor.getPattern(ctx, this); + needRestore = true; + } -/** - * This is the main entry point for loading a PDF and interacting with it. - * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR) - * is used, which means it must follow the same origin rules that any XHR does - * e.g. No cross domain requests without CORS. - * - * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src - * Can be a url to where a PDF is located, a typed array (Uint8Array) - * already populated with data or parameter object. - * - * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used - * if you want to manually serve range requests for data in the PDF. - * - * @param {function} passwordCallback (deprecated) It is used to request a - * password if wrong or no password was provided. The callback receives two - * parameters: function that needs to be called with new password and reason - * (see {PasswordResponses}). - * - * @param {function} progressCallback (deprecated) It is used to be able to - * monitor the loading progress of the PDF file (necessary to implement e.g. - * a loading bar). The callback receives an {Object} with the properties: - * {number} loaded and {number} total. - * - * @return {PDFDocumentLoadingTask} - */ -PDFJS.getDocument = function getDocument(src, - pdfDataRangeTransport, - passwordCallback, - progressCallback) { - var task = new PDFDocumentLoadingTask(); + if (this.pendingEOFill) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.fill(); + ctx.mozFillRule = 'nonzero'; + } else { + ctx.fill('evenodd'); + } + this.pendingEOFill = false; + } else { + ctx.fill(); + } - // Support of the obsolete arguments (for compatibility with API v1.0) - if (arguments.length > 1) { - deprecated('getDocument is called with pdfDataRangeTransport, ' + - 'passwordCallback or progressCallback argument'); - } - if (pdfDataRangeTransport) { - if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) { - // Not a PDFDataRangeTransport instance, trying to add missing properties. - pdfDataRangeTransport = Object.create(pdfDataRangeTransport); - pdfDataRangeTransport.length = src.length; - pdfDataRangeTransport.initialData = src.initialData; - if (!pdfDataRangeTransport.abort) { - pdfDataRangeTransport.abort = function () {}; + if (needRestore) { + ctx.restore(); } - } - src = Object.create(src); - src.range = pdfDataRangeTransport; - } - task.onPassword = passwordCallback || null; - task.onProgress = progressCallback || null; + if (consumePath) { + this.consumePath(); + } + }, + eoFill: function CanvasGraphics_eoFill() { + this.pendingEOFill = true; + this.fill(); + }, + fillStroke: function CanvasGraphics_fillStroke() { + this.fill(false); + this.stroke(false); - var source; - if (typeof src === 'string') { - source = { url: src }; - } else if (isArrayBuffer(src)) { - source = { data: src }; - } else if (src instanceof PDFDataRangeTransport) { - source = { range: src }; - } else { - if (typeof src !== 'object') { - error('Invalid parameter in getDocument, need either Uint8Array, ' + - 'string or a parameter object'); - } - if (!src.url && !src.data && !src.range) { - error('Invalid parameter object: need either .data, .range or .url'); - } + this.consumePath(); + }, + eoFillStroke: function CanvasGraphics_eoFillStroke() { + this.pendingEOFill = true; + this.fillStroke(); + }, + closeFillStroke: function CanvasGraphics_closeFillStroke() { + this.closePath(); + this.fillStroke(); + }, + closeEOFillStroke: function CanvasGraphics_closeEOFillStroke() { + this.pendingEOFill = true; + this.closePath(); + this.fillStroke(); + }, + endPath: function CanvasGraphics_endPath() { + this.consumePath(); + }, - source = src; - } + // Clipping + clip: function CanvasGraphics_clip() { + this.pendingClip = NORMAL_CLIP; + }, + eoClip: function CanvasGraphics_eoClip() { + this.pendingClip = EO_CLIP; + }, - var params = {}; - var rangeTransport = null; - var worker = null; - for (var key in source) { - if (key === 'url' && typeof window !== 'undefined') { - // The full path is required in the 'url' field. - params[key] = combineUrl(window.location.href, source[key]); - continue; - } else if (key === 'range') { - rangeTransport = source[key]; - continue; - } else if (key === 'worker') { - worker = source[key]; - continue; - } else if (key === 'data' && !(source[key] instanceof Uint8Array)) { - // Converting string or array-like data to Uint8Array. - var pdfBytes = source[key]; - if (typeof pdfBytes === 'string') { - params[key] = stringToBytes(pdfBytes); - } else if (typeof pdfBytes === 'object' && pdfBytes !== null && - !isNaN(pdfBytes.length)) { - params[key] = new Uint8Array(pdfBytes); - } else if (isArrayBuffer(pdfBytes)) { - params[key] = new Uint8Array(pdfBytes); - } else { - error('Invalid PDF binary data: either typed array, string or ' + - 'array-like object is expected in the data property.'); + // Text + beginText: function CanvasGraphics_beginText() { + this.current.textMatrix = IDENTITY_MATRIX; + this.current.textMatrixScale = 1; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + endText: function CanvasGraphics_endText() { + var paths = this.pendingTextPaths; + var ctx = this.ctx; + if (paths === undefined) { + ctx.beginPath(); + return; } - continue; - } - params[key] = source[key]; - } - - params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE; - if (!worker) { - // Worker was not provided -- creating and owning our own. - worker = new PDFWorker(); - task._worker = worker; - } - var docId = task.docId; - worker.promise.then(function () { - if (task.destroyed) { - throw new Error('Loading aborted'); - } - return _fetchDocument(worker, params, rangeTransport, docId).then( - function (workerId) { - if (task.destroyed) { - throw new Error('Loading aborted'); + ctx.save(); + ctx.beginPath(); + for (var i = 0; i < paths.length; i++) { + var path = paths[i]; + ctx.setTransform.apply(ctx, path.transform); + ctx.translate(path.x, path.y); + path.addToPath(ctx, path.fontSize); } - var messageHandler = new MessageHandler(docId, workerId, worker.port); - messageHandler.send('Ready', null); - var transport = new WorkerTransport(messageHandler, task, rangeTransport); - task._transport = transport; - }); - }, task._capability.reject); - - return task; -}; + ctx.restore(); + ctx.clip(); + ctx.beginPath(); + delete this.pendingTextPaths; + }, + setCharSpacing: function CanvasGraphics_setCharSpacing(spacing) { + this.current.charSpacing = spacing; + }, + setWordSpacing: function CanvasGraphics_setWordSpacing(spacing) { + this.current.wordSpacing = spacing; + }, + setHScale: function CanvasGraphics_setHScale(scale) { + this.current.textHScale = scale / 100; + }, + setLeading: function CanvasGraphics_setLeading(leading) { + this.current.leading = -leading; + }, + setFont: function CanvasGraphics_setFont(fontRefName, size) { + var fontObj = this.commonObjs.get(fontRefName); + var current = this.current; -/** - * Starts fetching of specified PDF document/data. - * @param {PDFWorker} worker - * @param {Object} source - * @param {PDFDataRangeTransport} pdfDataRangeTransport - * @param {string} docId Unique document id, used as MessageHandler id. - * @returns {Promise} The promise, which is resolved when worker id of - * MessageHandler is known. - * @private - */ -function _fetchDocument(worker, source, pdfDataRangeTransport, docId) { - if (worker.destroyed) { - return Promise.reject(new Error('Worker was destroyed')); - } + if (!fontObj) { + error('Can\'t find font for ' + fontRefName); + } - source.disableAutoFetch = PDFJS.disableAutoFetch; - source.disableStream = PDFJS.disableStream; - source.chunkedViewerLoading = !!pdfDataRangeTransport; - if (pdfDataRangeTransport) { - source.length = pdfDataRangeTransport.length; - source.initialData = pdfDataRangeTransport.initialData; - } - return worker.messageHandler.sendWithPromise('GetDocRequest', { - docId: docId, - source: source, - disableRange: PDFJS.disableRange, - maxImageSize: PDFJS.maxImageSize, - cMapUrl: PDFJS.cMapUrl, - cMapPacked: PDFJS.cMapPacked, - disableFontFace: PDFJS.disableFontFace, - disableCreateObjectURL: PDFJS.disableCreateObjectURL, - verbosity: PDFJS.verbosity - }).then(function (workerId) { - if (worker.destroyed) { - throw new Error('Worker was destroyed'); - } - return workerId; - }); -} + current.fontMatrix = (fontObj.fontMatrix ? + fontObj.fontMatrix : FONT_IDENTITY_MATRIX); -/** - * PDF document loading operation. - * @class - * @alias PDFDocumentLoadingTask - */ -var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() { - var nextDocumentId = 0; + // A valid matrix needs all main diagonal elements to be non-zero + // This also ensures we bypass FF bugzilla bug #719844. + if (current.fontMatrix[0] === 0 || + current.fontMatrix[3] === 0) { + warn('Invalid font matrix for font ' + fontRefName); + } - /** @constructs PDFDocumentLoadingTask */ - function PDFDocumentLoadingTask() { - this._capability = createPromiseCapability(); - this._transport = null; - this._worker = null; + // The spec for Tf (setFont) says that 'size' specifies the font 'scale', + // and in some docs this can be negative (inverted x-y axes). + if (size < 0) { + size = -size; + current.fontDirection = -1; + } else { + current.fontDirection = 1; + } - /** - * Unique document loading task id -- used in MessageHandlers. - * @type {string} - */ - this.docId = 'd' + (nextDocumentId++); + this.current.font = fontObj; + this.current.fontSize = size; - /** - * Shows if loading task is destroyed. - * @type {boolean} - */ - this.destroyed = false; + if (fontObj.isType3Font) { + return; // we don't need ctx.font for Type3 fonts + } - /** - * Callback to request a password if wrong or no password was provided. - * The callback receives two parameters: function that needs to be called - * with new password and reason (see {PasswordResponses}). - */ - this.onPassword = null; + var name = fontObj.loadedName || 'sans-serif'; + var bold = fontObj.black ? (fontObj.bold ? '900' : 'bold') : + (fontObj.bold ? 'bold' : 'normal'); - /** - * Callback to be able to monitor the loading progress of the PDF file - * (necessary to implement e.g. a loading bar). The callback receives - * an {Object} with the properties: {number} loaded and {number} total. - */ - this.onProgress = null; + var italic = fontObj.italic ? 'italic' : 'normal'; + var typeface = '"' + name + '", ' + fontObj.fallbackName; - /** - * Callback to when unsupported feature is used. The callback receives - * an {PDFJS.UNSUPPORTED_FEATURES} argument. - */ - this.onUnsupportedFeature = null; - } + // Some font backends cannot handle fonts below certain size. + // Keeping the font at minimal size and using the fontSizeScale to change + // the current transformation matrix before the fillText/strokeText. + // See https://bugzilla.mozilla.org/show_bug.cgi?id=726227 + var browserFontSize = size < MIN_FONT_SIZE ? MIN_FONT_SIZE : + size > MAX_FONT_SIZE ? MAX_FONT_SIZE : size; + this.current.fontSizeScale = size / browserFontSize; - PDFDocumentLoadingTask.prototype = - /** @lends PDFDocumentLoadingTask.prototype */ { - /** - * @return {Promise} - */ - get promise() { - return this._capability.promise; + var rule = italic + ' ' + bold + ' ' + browserFontSize + 'px ' + typeface; + this.ctx.font = rule; }, - - /** - * Aborts all network requests and destroys worker. - * @return {Promise} A promise that is resolved after destruction activity - * is completed. - */ - destroy: function () { - this.destroyed = true; - - var transportDestroyed = !this._transport ? Promise.resolve() : - this._transport.destroy(); - return transportDestroyed.then(function () { - this._transport = null; - if (this._worker) { - this._worker.destroy(); - this._worker = null; - } - }.bind(this)); + setTextRenderingMode: function CanvasGraphics_setTextRenderingMode(mode) { + this.current.textRenderingMode = mode; + }, + setTextRise: function CanvasGraphics_setTextRise(rise) { + this.current.textRise = rise; + }, + moveText: function CanvasGraphics_moveText(x, y) { + this.current.x = this.current.lineX += x; + this.current.y = this.current.lineY += y; + }, + setLeadingMoveText: function CanvasGraphics_setLeadingMoveText(x, y) { + this.setLeading(-y); + this.moveText(x, y); }, + setTextMatrix: function CanvasGraphics_setTextMatrix(a, b, c, d, e, f) { + this.current.textMatrix = [a, b, c, d, e, f]; + this.current.textMatrixScale = Math.sqrt(a * a + b * b); - /** - * Registers callbacks to indicate the document loading completion. - * - * @param {function} onFulfilled The callback for the loading completion. - * @param {function} onRejected The callback for the loading failure. - * @return {Promise} A promise that is resolved after the onFulfilled or - * onRejected callback. - */ - then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) { - return this.promise.then.apply(this.promise, arguments); - } - }; + this.current.x = this.current.lineX = 0; + this.current.y = this.current.lineY = 0; + }, + nextLine: function CanvasGraphics_nextLine() { + this.moveText(0, this.current.leading); + }, - return PDFDocumentLoadingTask; -})(); + paintChar: function CanvasGraphics_paintChar(character, x, y) { + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var textRenderingMode = current.textRenderingMode; + var fontSize = current.fontSize / current.fontSizeScale; + var fillStrokeMode = textRenderingMode & + TextRenderingMode.FILL_STROKE_MASK; + var isAddToPathSet = !!(textRenderingMode & + TextRenderingMode.ADD_TO_PATH_FLAG); -/** - * Abstract class to support range requests file loading. - * @class - * @alias PDFJS.PDFDataRangeTransport - * @param {number} length - * @param {Uint8Array} initialData - */ -var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() { - function PDFDataRangeTransport(length, initialData) { - this.length = length; - this.initialData = initialData; + var addToPath; + if (font.disableFontFace || isAddToPathSet) { + addToPath = font.getPathGenerator(this.commonObjs, character); + } - this._rangeListeners = []; - this._progressListeners = []; - this._progressiveReadListeners = []; - this._readyCapability = createPromiseCapability(); - } - PDFDataRangeTransport.prototype = - /** @lends PDFDataRangeTransport.prototype */ { - addRangeListener: - function PDFDataRangeTransport_addRangeListener(listener) { - this._rangeListeners.push(listener); - }, + if (font.disableFontFace) { + ctx.save(); + ctx.translate(x, y); + ctx.beginPath(); + addToPath(ctx, fontSize); + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fill(); + } + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.stroke(); + } + ctx.restore(); + } else { + if (fillStrokeMode === TextRenderingMode.FILL || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.fillText(character, x, y); + } + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + ctx.strokeText(character, x, y); + } + } - addProgressListener: - function PDFDataRangeTransport_addProgressListener(listener) { - this._progressListeners.push(listener); + if (isAddToPathSet) { + var paths = this.pendingTextPaths || (this.pendingTextPaths = []); + paths.push({ + transform: ctx.mozCurrentTransform, + x: x, + y: y, + fontSize: fontSize, + addToPath: addToPath + }); + } }, - addProgressiveReadListener: - function PDFDataRangeTransport_addProgressiveReadListener(listener) { - this._progressiveReadListeners.push(listener); + get isFontSubpixelAAEnabled() { + // Checks if anti-aliasing is enabled when scaled text is painted. + // On Windows GDI scaled fonts looks bad. + var ctx = document.createElement('canvas').getContext('2d'); + ctx.scale(1.5, 1); + ctx.fillText('I', 0, 10); + var data = ctx.getImageData(0, 0, 10, 10).data; + var enabled = false; + for (var i = 3; i < data.length; i += 4) { + if (data[i] > 0 && data[i] < 255) { + enabled = true; + break; + } + } + return shadow(this, 'isFontSubpixelAAEnabled', enabled); }, - onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) { - var listeners = this._rangeListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](begin, chunk); + showText: function CanvasGraphics_showText(glyphs) { + var current = this.current; + var font = current.font; + if (font.isType3Font) { + return this.showType3Text(glyphs); } - }, - onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) { - this._readyCapability.promise.then(function () { - var listeners = this._progressListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](loaded); - } - }.bind(this)); - }, + var fontSize = current.fontSize; + if (fontSize === 0) { + return; + } - onDataProgressiveRead: - function PDFDataRangeTransport_onDataProgress(chunk) { - this._readyCapability.promise.then(function () { - var listeners = this._progressiveReadListeners; - for (var i = 0, n = listeners.length; i < n; ++i) { - listeners[i](chunk); + var ctx = this.ctx; + var fontSizeScale = current.fontSizeScale; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var fontDirection = current.fontDirection; + var textHScale = current.textHScale * fontDirection; + var glyphsLength = glyphs.length; + var vertical = font.vertical; + var spacingDir = vertical ? 1 : -1; + var defaultVMetrics = font.defaultVMetrics; + var widthAdvanceScale = fontSize * current.fontMatrix[0]; + + var simpleFillText = + current.textRenderingMode === TextRenderingMode.FILL && + !font.disableFontFace; + + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y + current.textRise); + + if (fontDirection > 0) { + ctx.scale(textHScale, -1); + } else { + ctx.scale(textHScale, 1); + } + + var lineWidth = current.lineWidth; + var scale = current.textMatrixScale; + if (scale === 0 || lineWidth === 0) { + var fillStrokeMode = current.textRenderingMode & + TextRenderingMode.FILL_STROKE_MASK; + if (fillStrokeMode === TextRenderingMode.STROKE || + fillStrokeMode === TextRenderingMode.FILL_STROKE) { + this.cachedGetSinglePixelWidth = null; + lineWidth = this.getSinglePixelWidth() * MIN_WIDTH_FACTOR; } - }.bind(this)); - }, + } else { + lineWidth /= scale; + } - transportReady: function PDFDataRangeTransport_transportReady() { - this._readyCapability.resolve(); - }, + if (fontSizeScale !== 1.0) { + ctx.scale(fontSizeScale, fontSizeScale); + lineWidth /= fontSizeScale; + } - requestDataRange: - function PDFDataRangeTransport_requestDataRange(begin, end) { - throw new Error('Abstract method PDFDataRangeTransport.requestDataRange'); - }, + ctx.lineWidth = lineWidth; - abort: function PDFDataRangeTransport_abort() { - } - }; - return PDFDataRangeTransport; -})(); + var x = 0, i; + for (i = 0; i < glyphsLength; ++i) { + var glyph = glyphs[i]; + if (isNum(glyph)) { + x += spacingDir * glyph * fontSize / 1000; + continue; + } -PDFJS.PDFDataRangeTransport = PDFDataRangeTransport; + var restoreNeeded = false; + var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; + var character = glyph.fontChar; + var accent = glyph.accent; + var scaledX, scaledY, scaledAccentX, scaledAccentY; + var width = glyph.width; + if (vertical) { + var vmetric, vx, vy; + vmetric = glyph.vmetric || defaultVMetrics; + vx = glyph.vmetric ? vmetric[1] : width * 0.5; + vx = -vx * widthAdvanceScale; + vy = vmetric[2] * widthAdvanceScale; -/** - * Proxy to a PDFDocument in the worker thread. Also, contains commonly used - * properties that can be read synchronously. - * @class - * @alias PDFDocumentProxy - */ -var PDFDocumentProxy = (function PDFDocumentProxyClosure() { - function PDFDocumentProxy(pdfInfo, transport, loadingTask) { - this.pdfInfo = pdfInfo; - this.transport = transport; - this.loadingTask = loadingTask; - } - PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ { - /** - * @return {number} Total number of pages the PDF contains. - */ - get numPages() { - return this.pdfInfo.numPages; - }, - /** - * @return {string} A unique ID to identify a PDF. Not guaranteed to be - * unique. - */ - get fingerprint() { - return this.pdfInfo.fingerprint; - }, - /** - * @param {number} pageNumber The page number to get. The first page is 1. - * @return {Promise} A promise that is resolved with a {@link PDFPageProxy} - * object. - */ - getPage: function PDFDocumentProxy_getPage(pageNumber) { - return this.transport.getPage(pageNumber); - }, - /** - * @param {{num: number, gen: number}} ref The page reference. Must have - * the 'num' and 'gen' properties. - * @return {Promise} A promise that is resolved with the page index that is - * associated with the reference. - */ - getPageIndex: function PDFDocumentProxy_getPageIndex(ref) { - return this.transport.getPageIndex(ref); - }, - /** - * @return {Promise} A promise that is resolved with a lookup table for - * mapping named destinations to reference numbers. - * - * This can be slow for large documents: use getDestination instead - */ - getDestinations: function PDFDocumentProxy_getDestinations() { - return this.transport.getDestinations(); - }, - /** - * @param {string} id The named destination to get. - * @return {Promise} A promise that is resolved with all information - * of the given named destination. - */ - getDestination: function PDFDocumentProxy_getDestination(id) { - return this.transport.getDestination(id); - }, - /** - * @return {Promise} A promise that is resolved with a lookup table for - * mapping named attachments to their content. - */ - getAttachments: function PDFDocumentProxy_getAttachments() { - return this.transport.getAttachments(); - }, - /** - * @return {Promise} A promise that is resolved with an array of all the - * JavaScript strings in the name tree. - */ - getJavaScript: function PDFDocumentProxy_getJavaScript() { - return this.transport.getJavaScript(); - }, - /** - * @return {Promise} A promise that is resolved with an {Array} that is a - * tree outline (if it has one) of the PDF. The tree is in the format of: - * [ - * { - * title: string, - * bold: boolean, - * italic: boolean, - * color: rgb array, - * dest: dest obj, - * items: array of more items like this - * }, - * ... - * ]. - */ - getOutline: function PDFDocumentProxy_getOutline() { - return this.transport.getOutline(); - }, - /** - * @return {Promise} A promise that is resolved with an {Object} that has - * info and metadata properties. Info is an {Object} filled with anything - * available in the information dictionary and similarly metadata is a - * {Metadata} object with information from the metadata section of the PDF. - */ - getMetadata: function PDFDocumentProxy_getMetadata() { - return this.transport.getMetadata(); - }, - /** - * @return {Promise} A promise that is resolved with a TypedArray that has - * the raw data from the PDF. - */ - getData: function PDFDocumentProxy_getData() { - return this.transport.getData(); - }, - /** - * @return {Promise} A promise that is resolved when the document's data - * is loaded. It is resolved with an {Object} that contains the length - * property that indicates size of the PDF data in bytes. - */ - getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() { - return this.transport.downloadInfoCapability.promise; - }, - /** - * @return {Promise} A promise this is resolved with current stats about - * document structures (see {@link PDFDocumentStats}). - */ - getStats: function PDFDocumentProxy_getStats() { - return this.transport.getStats(); - }, - /** - * Cleans up resources allocated by the document, e.g. created @font-face. - */ - cleanup: function PDFDocumentProxy_cleanup() { - this.transport.startCleanup(); + width = vmetric ? -vmetric[0] : width; + scaledX = vx / fontSizeScale; + scaledY = (x + vy) / fontSizeScale; + } else { + scaledX = x / fontSizeScale; + scaledY = 0; + } + + if (font.remeasure && width > 0) { + // Some standard fonts may not have the exact width: rescale per + // character if measured width is greater than expected glyph width + // and subpixel-aa is enabled, otherwise just center the glyph. + var measuredWidth = ctx.measureText(character).width * 1000 / + fontSize * fontSizeScale; + if (width < measuredWidth && this.isFontSubpixelAAEnabled) { + var characterScaleX = width / measuredWidth; + restoreNeeded = true; + ctx.save(); + ctx.scale(characterScaleX, 1); + scaledX /= characterScaleX; + } else if (width !== measuredWidth) { + scaledX += (width - measuredWidth) / 2000 * + fontSize / fontSizeScale; + } + } + + if (simpleFillText && !accent) { + // common case + ctx.fillText(character, scaledX, scaledY); + } else { + this.paintChar(character, scaledX, scaledY); + if (accent) { + scaledAccentX = scaledX + accent.offset.x / fontSizeScale; + scaledAccentY = scaledY - accent.offset.y / fontSizeScale; + this.paintChar(accent.fontChar, scaledAccentX, scaledAccentY); + } + } + + var charWidth = width * widthAdvanceScale + spacing * fontDirection; + x += charWidth; + + if (restoreNeeded) { + ctx.restore(); + } + } + if (vertical) { + current.y -= x * textHScale; + } else { + current.x += x * textHScale; + } + ctx.restore(); }, - /** - * Destroys current document instance and terminates worker. - */ - destroy: function PDFDocumentProxy_destroy() { - return this.loadingTask.destroy(); - } - }; - return PDFDocumentProxy; -})(); -/** - * Page getTextContent parameters. - * - * @typedef {Object} getTextContentParameters - * @param {boolean} normalizeWhitespace - replaces all occurrences of - * whitespace with standard spaces (0x20). The default value is `false`. - */ + showType3Text: function CanvasGraphics_showType3Text(glyphs) { + // Type3 fonts - each glyph is a "mini-PDF" + var ctx = this.ctx; + var current = this.current; + var font = current.font; + var fontSize = current.fontSize; + var fontDirection = current.fontDirection; + var spacingDir = font.vertical ? 1 : -1; + var charSpacing = current.charSpacing; + var wordSpacing = current.wordSpacing; + var textHScale = current.textHScale * fontDirection; + var fontMatrix = current.fontMatrix || FONT_IDENTITY_MATRIX; + var glyphsLength = glyphs.length; + var isTextInvisible = + current.textRenderingMode === TextRenderingMode.INVISIBLE; + var i, glyph, width, spacingLength; -/** - * Page text content. - * - * @typedef {Object} TextContent - * @property {array} items - array of {@link TextItem} - * @property {Object} styles - {@link TextStyles} objects, indexed by font - * name. - */ + if (isTextInvisible || fontSize === 0) { + return; + } + this.cachedGetSinglePixelWidth = null; -/** - * Page text content part. - * - * @typedef {Object} TextItem - * @property {string} str - text content. - * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'. - * @property {array} transform - transformation matrix. - * @property {number} width - width in device space. - * @property {number} height - height in device space. - * @property {string} fontName - font name used by pdf.js for converted font. - */ + ctx.save(); + ctx.transform.apply(ctx, current.textMatrix); + ctx.translate(current.x, current.y); -/** - * Text style. - * - * @typedef {Object} TextStyle - * @property {number} ascent - font ascent. - * @property {number} descent - font descent. - * @property {boolean} vertical - text is in vertical mode. - * @property {string} fontFamily - possible font family - */ + ctx.scale(textHScale, fontDirection); -/** - * Page annotation parameters. - * - * @typedef {Object} GetAnnotationsParameters - * @param {string} intent - Determines the annotations that will be fetched, - * can be either 'display' (viewable annotations) or 'print' - * (printable annotations). - * If the parameter is omitted, all annotations are fetched. - */ + for (i = 0; i < glyphsLength; ++i) { + glyph = glyphs[i]; + if (isNum(glyph)) { + spacingLength = spacingDir * glyph * fontSize / 1000; + this.ctx.translate(spacingLength, 0); + current.x += spacingLength * textHScale; + continue; + } -/** - * Page render parameters. - * - * @typedef {Object} RenderParameters - * @property {Object} canvasContext - A 2D context of a DOM Canvas object. - * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by - * calling of PDFPage.getViewport method. - * @property {string} intent - Rendering intent, can be 'display' or 'print' - * (default value is 'display'). - * @property {Array} transform - (optional) Additional transform, applied - * just before viewport transform. - * @property {Object} imageLayer - (optional) An object that has beginLayout, - * endLayout and appendImage functions. - * @property {function} continueCallback - (deprecated) A function that will be - * called each time the rendering is paused. To continue - * rendering call the function that is the first argument - * to the callback. - */ + var spacing = (glyph.isSpace ? wordSpacing : 0) + charSpacing; + var operatorList = font.charProcOperatorList[glyph.operatorListId]; + if (!operatorList) { + warn('Type3 character \"' + glyph.operatorListId + + '\" is not available'); + continue; + } + this.processingType3 = glyph; + this.save(); + ctx.scale(fontSize, fontSize); + ctx.transform.apply(ctx, fontMatrix); + this.executeOperatorList(operatorList); + this.restore(); -/** - * PDF page operator list. - * - * @typedef {Object} PDFOperatorList - * @property {Array} fnArray - Array containing the operator functions. - * @property {Array} argsArray - Array containing the arguments of the - * functions. - */ + var transformed = Util.applyTransform([glyph.width, 0], fontMatrix); + width = transformed[0] * fontSize + spacing; -/** - * Proxy to a PDFPage in the worker thread. - * @class - * @alias PDFPageProxy - */ -var PDFPageProxy = (function PDFPageProxyClosure() { - function PDFPageProxy(pageIndex, pageInfo, transport) { - this.pageIndex = pageIndex; - this.pageInfo = pageInfo; - this.transport = transport; - this.stats = new StatTimer(); - this.stats.enabled = !!globalScope.PDFJS.enableStats; - this.commonObjs = transport.commonObjs; - this.objs = new PDFObjects(); - this.cleanupAfterRender = false; - this.pendingCleanup = false; - this.intentStates = {}; - this.destroyed = false; - } - PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ { - /** - * @return {number} Page number of the page. First page is 1. - */ - get pageNumber() { - return this.pageIndex + 1; + ctx.translate(width, 0); + current.x += width * textHScale; + } + ctx.restore(); + this.processingType3 = null; }, - /** - * @return {number} The number of degrees the page is rotated clockwise. - */ - get rotate() { - return this.pageInfo.rotate; + + // Type3 fonts + setCharWidth: function CanvasGraphics_setCharWidth(xWidth, yWidth) { + // We can safely ignore this since the width should be the same + // as the width in the Widths array. }, - /** - * @return {Object} The reference that points to this page. It has 'num' and - * 'gen' properties. - */ - get ref() { - return this.pageInfo.ref; + setCharWidthAndBounds: function CanvasGraphics_setCharWidthAndBounds(xWidth, + yWidth, + llx, + lly, + urx, + ury) { + // TODO According to the spec we're also suppose to ignore any operators + // that set color or include images while processing this type3 font. + this.ctx.rect(llx, lly, urx - llx, ury - lly); + this.clip(); + this.endPath(); + }, + + // Color + getColorN_Pattern: function CanvasGraphics_getColorN_Pattern(IR) { + var pattern; + if (IR[0] === 'TilingPattern') { + var color = IR[1]; + var baseTransform = this.baseTransform || + this.ctx.mozCurrentTransform.slice(); + var self = this; + var canvasGraphicsFactory = { + createCanvasGraphics: function (ctx) { + return new CanvasGraphics(ctx, self.commonObjs, self.objs); + } + }; + pattern = new TilingPattern(IR, color, this.ctx, canvasGraphicsFactory, + baseTransform); + } else { + pattern = getShadingPatternFromIR(IR); + } + return pattern; + }, + setStrokeColorN: function CanvasGraphics_setStrokeColorN(/*...*/) { + this.current.strokeColor = this.getColorN_Pattern(arguments); + }, + setFillColorN: function CanvasGraphics_setFillColorN(/*...*/) { + this.current.fillColor = this.getColorN_Pattern(arguments); + this.current.patternFill = true; }, - /** - * @return {Array} An array of the visible portion of the PDF page in the - * user space units - [x1, y1, x2, y2]. - */ - get view() { - return this.pageInfo.view; + setStrokeRGBColor: function CanvasGraphics_setStrokeRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.ctx.strokeStyle = color; + this.current.strokeColor = color; }, - /** - * @param {number} scale The desired scale of the viewport. - * @param {number} rotate Degrees to rotate the viewport. If omitted this - * defaults to the page rotation. - * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties - * along with transforms required for rendering. - */ - getViewport: function PDFPageProxy_getViewport(scale, rotate) { - if (arguments.length < 2) { - rotate = this.rotate; - } - return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0); + setFillRGBColor: function CanvasGraphics_setFillRGBColor(r, g, b) { + var color = Util.makeCssRgb(r, g, b); + this.ctx.fillStyle = color; + this.current.fillColor = color; + this.current.patternFill = false; }, - /** - * @param {GetAnnotationsParameters} params - Annotation parameters. - * @return {Promise} A promise that is resolved with an {Array} of the - * annotation objects. - */ - getAnnotations: function PDFPageProxy_getAnnotations(params) { - var intent = (params && params.intent) || null; - if (!this.annotationsPromise || this.annotationsIntent !== intent) { - this.annotationsPromise = this.transport.getAnnotations(this.pageIndex, - intent); - this.annotationsIntent = intent; + shadingFill: function CanvasGraphics_shadingFill(patternIR) { + var ctx = this.ctx; + + this.save(); + var pattern = getShadingPatternFromIR(patternIR); + ctx.fillStyle = pattern.getPattern(ctx, this, true); + + var inv = ctx.mozCurrentTransformInverse; + if (inv) { + var canvas = ctx.canvas; + var width = canvas.width; + var height = canvas.height; + + var bl = Util.applyTransform([0, 0], inv); + var br = Util.applyTransform([0, height], inv); + var ul = Util.applyTransform([width, 0], inv); + var ur = Util.applyTransform([width, height], inv); + + var x0 = Math.min(bl[0], br[0], ul[0], ur[0]); + var y0 = Math.min(bl[1], br[1], ul[1], ur[1]); + var x1 = Math.max(bl[0], br[0], ul[0], ur[0]); + var y1 = Math.max(bl[1], br[1], ul[1], ur[1]); + + this.ctx.fillRect(x0, y0, x1 - x0, y1 - y0); + } else { + // HACK to draw the gradient onto an infinite rectangle. + // PDF gradients are drawn across the entire image while + // Canvas only allows gradients to be drawn in a rectangle + // The following bug should allow us to remove this. + // https://bugzilla.mozilla.org/show_bug.cgi?id=664884 + + this.ctx.fillRect(-1e10, -1e10, 2e10, 2e10); } - return this.annotationsPromise; + + this.restore(); }, - /** - * Begins the process of rendering a page to the desired context. - * @param {RenderParameters} params Page render parameters. - * @return {RenderTask} An object that contains the promise, which - * is resolved when the page finishes rendering. - */ - render: function PDFPageProxy_render(params) { - var stats = this.stats; - stats.time('Overall'); - // If there was a pending destroy cancel it so no cleanup happens during - // this call to render. - this.pendingCleanup = false; + // Images + beginInlineImage: function CanvasGraphics_beginInlineImage() { + error('Should not call beginInlineImage'); + }, + beginImageData: function CanvasGraphics_beginImageData() { + error('Should not call beginImageData'); + }, - var renderingIntent = (params.intent === 'print' ? 'print' : 'display'); + paintFormXObjectBegin: function CanvasGraphics_paintFormXObjectBegin(matrix, + bbox) { + this.save(); + this.baseTransformStack.push(this.baseTransform); - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; + if (isArray(matrix) && 6 === matrix.length) { + this.transform.apply(this, matrix); } - var intentState = this.intentStates[renderingIntent]; - // If there's no displayReadyCapability yet, then the operatorList - // was never requested before. Make the request and create the promise. - if (!intentState.displayReadyCapability) { - intentState.receivingOperatorList = true; - intentState.displayReadyCapability = createPromiseCapability(); - intentState.operatorList = { - fnArray: [], - argsArray: [], - lastChunk: false - }; + this.baseTransform = this.ctx.mozCurrentTransform; - this.stats.time('Page Request'); - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageNumber - 1, - intent: renderingIntent - }); + if (isArray(bbox) && 4 === bbox.length) { + var width = bbox[2] - bbox[0]; + var height = bbox[3] - bbox[1]; + this.ctx.rect(bbox[0], bbox[1], width, height); + this.clip(); + this.endPath(); + } + }, + + paintFormXObjectEnd: function CanvasGraphics_paintFormXObjectEnd() { + this.restore(); + this.baseTransform = this.baseTransformStack.pop(); + }, + + beginGroup: function CanvasGraphics_beginGroup(group) { + this.save(); + var currentCtx = this.ctx; + // TODO non-isolated groups - according to Rik at adobe non-isolated + // group results aren't usually that different and they even have tools + // that ignore this setting. Notes from Rik on implmenting: + // - When you encounter an transparency group, create a new canvas with + // the dimensions of the bbox + // - copy the content from the previous canvas to the new canvas + // - draw as usual + // - remove the backdrop alpha: + // alphaNew = 1 - (1 - alpha)/(1 - alphaBackdrop) with 'alpha' the alpha + // value of your transparency group and 'alphaBackdrop' the alpha of the + // backdrop + // - remove background color: + // colorNew = color - alphaNew *colorBackdrop /(1 - alphaNew) + if (!group.isolated) { + info('TODO: Support non-isolated groups.'); } - var internalRenderTask = new InternalRenderTask(complete, params, - this.objs, - this.commonObjs, - intentState.operatorList, - this.pageNumber); - internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print'; - if (!intentState.renderTasks) { - intentState.renderTasks = []; + // TODO knockout - supposedly possible with the clever use of compositing + // modes. + if (group.knockout) { + warn('Knockout groups not supported.'); } - intentState.renderTasks.push(internalRenderTask); - var renderTask = internalRenderTask.task; - // Obsolete parameter support - if (params.continueCallback) { - deprecated('render is used with continueCallback parameter'); - renderTask.onContinue = params.continueCallback; + var currentTransform = currentCtx.mozCurrentTransform; + if (group.matrix) { + currentCtx.transform.apply(currentCtx, group.matrix); } + assert(group.bbox, 'Bounding box is required.'); - var self = this; - intentState.displayReadyCapability.promise.then( - function pageDisplayReadyPromise(transparency) { - if (self.pendingCleanup) { - complete(); - return; - } - stats.time('Rendering'); - internalRenderTask.initalizeGraphics(transparency); - internalRenderTask.operatorListChanged(); - }, - function pageDisplayReadPromiseError(reason) { - complete(reason); - } - ); + // Based on the current transform figure out how big the bounding box + // will actually be. + var bounds = Util.getAxialAlignedBoundingBox( + group.bbox, + currentCtx.mozCurrentTransform); + // Clip the bounding box to the current canvas. + var canvasBounds = [0, + 0, + currentCtx.canvas.width, + currentCtx.canvas.height]; + bounds = Util.intersect(bounds, canvasBounds) || [0, 0, 0, 0]; + // Use ceil in case we're between sizes so we don't create canvas that is + // too small and make the canvas at least 1x1 pixels. + var offsetX = Math.floor(bounds[0]); + var offsetY = Math.floor(bounds[1]); + var drawnWidth = Math.max(Math.ceil(bounds[2]) - offsetX, 1); + var drawnHeight = Math.max(Math.ceil(bounds[3]) - offsetY, 1); + var scaleX = 1, scaleY = 1; + if (drawnWidth > MAX_GROUP_SIZE) { + scaleX = drawnWidth / MAX_GROUP_SIZE; + drawnWidth = MAX_GROUP_SIZE; + } + if (drawnHeight > MAX_GROUP_SIZE) { + scaleY = drawnHeight / MAX_GROUP_SIZE; + drawnHeight = MAX_GROUP_SIZE; + } - function complete(error) { - var i = intentState.renderTasks.indexOf(internalRenderTask); - if (i >= 0) { - intentState.renderTasks.splice(i, 1); - } + var cacheId = 'groupAt' + this.groupLevel; + if (group.smask) { + // Using two cache entries is case if masks are used one after another. + cacheId += '_smask_' + ((this.smaskCounter++) % 2); + } + var scratchCanvas = this.cachedCanvases.getCanvas( + cacheId, drawnWidth, drawnHeight, true); + var groupCtx = scratchCanvas.context; - if (self.cleanupAfterRender) { - self.pendingCleanup = true; - } - self._tryCleanup(); + // Since we created a new canvas that is just the size of the bounding box + // we have to translate the group ctx. + groupCtx.scale(1 / scaleX, 1 / scaleY); + groupCtx.translate(-offsetX, -offsetY); + groupCtx.transform.apply(groupCtx, currentTransform); - if (error) { - internalRenderTask.capability.reject(error); - } else { - internalRenderTask.capability.resolve(); - } - stats.timeEnd('Rendering'); - stats.timeEnd('Overall'); + if (group.smask) { + // Saving state and cached mask to be used in setGState. + this.smaskStack.push({ + canvas: scratchCanvas.canvas, + context: groupCtx, + offsetX: offsetX, + offsetY: offsetY, + scaleX: scaleX, + scaleY: scaleY, + subtype: group.smask.subtype, + backdrop: group.smask.backdrop, + transferMap: group.smask.transferMap || null + }); + } else { + // Setup the current ctx so when the group is popped we draw it at the + // right location. + currentCtx.setTransform(1, 0, 0, 1, 0, 0); + currentCtx.translate(offsetX, offsetY); + currentCtx.scale(scaleX, scaleY); } - - return renderTask; + // The transparency group inherits all off the current graphics state + // except the blend mode, soft mask, and alpha constants. + copyCtxState(currentCtx, groupCtx); + this.ctx = groupCtx; + this.setGState([ + ['BM', 'Normal'], + ['ca', 1], + ['CA', 1] + ]); + this.groupStack.push(currentCtx); + this.groupLevel++; }, - /** - * @return {Promise} A promise resolved with an {@link PDFOperatorList} - * object that represents page's operator list. - */ - getOperatorList: function PDFPageProxy_getOperatorList() { - function operatorListChanged() { - if (intentState.operatorList.lastChunk) { - intentState.opListReadCapability.resolve(intentState.operatorList); - } + endGroup: function CanvasGraphics_endGroup(group) { + this.groupLevel--; + var groupCtx = this.ctx; + this.ctx = this.groupStack.pop(); + // Turn off image smoothing to avoid sub pixel interpolation which can + // look kind of blurry for some pdfs. + if (this.ctx.imageSmoothingEnabled !== undefined) { + this.ctx.imageSmoothingEnabled = false; + } else { + this.ctx.mozImageSmoothingEnabled = false; } - - var renderingIntent = 'oplist'; - if (!this.intentStates[renderingIntent]) { - this.intentStates[renderingIntent] = {}; + if (group.smask) { + this.tempSMask = this.smaskStack.pop(); + } else { + this.ctx.drawImage(groupCtx.canvas, 0, 0); } - var intentState = this.intentStates[renderingIntent]; + this.restore(); + }, - if (!intentState.opListReadCapability) { - var opListTask = {}; - opListTask.operatorListChanged = operatorListChanged; - intentState.receivingOperatorList = true; - intentState.opListReadCapability = createPromiseCapability(); - intentState.renderTasks = []; - intentState.renderTasks.push(opListTask); - intentState.operatorList = { - fnArray: [], - argsArray: [], - lastChunk: false - }; + beginAnnotations: function CanvasGraphics_beginAnnotations() { + this.save(); + this.current = new CanvasExtraState(); - this.transport.messageHandler.send('RenderPageRequest', { - pageIndex: this.pageIndex, - intent: renderingIntent - }); + if (this.baseTransform) { + this.ctx.setTransform.apply(this.ctx, this.baseTransform); } - return intentState.opListReadCapability.promise; }, - /** - * @param {getTextContentParameters} params - getTextContent parameters. - * @return {Promise} That is resolved a {@link TextContent} - * object that represent the page text content. - */ - getTextContent: function PDFPageProxy_getTextContent(params) { - var normalizeWhitespace = (params && params.normalizeWhitespace) || false; - - return this.transport.messageHandler.sendWithPromise('GetTextContent', { - pageIndex: this.pageNumber - 1, - normalizeWhitespace: normalizeWhitespace, - }); + endAnnotations: function CanvasGraphics_endAnnotations() { + this.restore(); }, - /** - * Destroys page object. - */ - _destroy: function PDFPageProxy_destroy() { - this.destroyed = true; - this.transport.pageCache[this.pageIndex] = null; + beginAnnotation: function CanvasGraphics_beginAnnotation(rect, transform, + matrix) { + this.save(); - var waitOn = []; - Object.keys(this.intentStates).forEach(function(intent) { - var intentState = this.intentStates[intent]; - intentState.renderTasks.forEach(function(renderTask) { - var renderCompleted = renderTask.capability.promise. - catch(function () {}); // ignoring failures - waitOn.push(renderCompleted); - renderTask.cancel(); - }); - }, this); - this.objs.clear(); - this.annotationsPromise = null; - this.pendingCleanup = false; - return Promise.all(waitOn); - }, + if (isArray(rect) && 4 === rect.length) { + var width = rect[2] - rect[0]; + var height = rect[3] - rect[1]; + this.ctx.rect(rect[0], rect[1], width, height); + this.clip(); + this.endPath(); + } - /** - * Cleans up resources allocated by the page. (deprecated) - */ - destroy: function() { - deprecated('page destroy method, use cleanup() instead'); - this.cleanup(); + this.transform.apply(this, transform); + this.transform.apply(this, matrix); }, - /** - * Cleans up resources allocated by the page. - */ - cleanup: function PDFPageProxy_cleanup() { - this.pendingCleanup = true; - this._tryCleanup(); + endAnnotation: function CanvasGraphics_endAnnotation() { + this.restore(); }, - /** - * For internal use only. Attempts to clean up if rendering is in a state - * where that's possible. - * @ignore - */ - _tryCleanup: function PDFPageProxy_tryCleanup() { - if (!this.pendingCleanup || - Object.keys(this.intentStates).some(function(intent) { - var intentState = this.intentStates[intent]; - return (intentState.renderTasks.length !== 0 || - intentState.receivingOperatorList); - }, this)) { + + paintJpegXObject: function CanvasGraphics_paintJpegXObject(objId, w, h) { + var domImage = this.objs.get(objId); + if (!domImage) { + warn('Dependent image isn\'t ready yet'); return; } - Object.keys(this.intentStates).forEach(function(intent) { - delete this.intentStates[intent]; - }, this); - this.objs.clear(); - this.annotationsPromise = null; - this.pendingCleanup = false; - }, - /** - * For internal use only. - * @ignore - */ - _startRenderPage: function PDFPageProxy_startRenderPage(transparency, - intent) { - var intentState = this.intentStates[intent]; - // TODO Refactor RenderPageRequest to separate rendering - // and operator list logic - if (intentState.displayReadyCapability) { - intentState.displayReadyCapability.resolve(transparency); + this.save(); + + var ctx = this.ctx; + // scale the image to the unit square + ctx.scale(1 / w, -1 / h); + + ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height, + 0, -h, w, h); + if (this.imageLayer) { + var currentTransform = ctx.mozCurrentTransformInverse; + var position = this.getCanvasPosition(0, 0); + this.imageLayer.appendImage({ + objId: objId, + left: position[0], + top: position[1], + width: w / currentTransform[0], + height: h / currentTransform[3] + }); } + this.restore(); }, - /** - * For internal use only. - * @ignore - */ - _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, - intent) { - var intentState = this.intentStates[intent]; - var i, ii; - // Add the new chunk to the current operator list. - for (i = 0, ii = operatorListChunk.length; i < ii; i++) { - intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]); - intentState.operatorList.argsArray.push( - operatorListChunk.argsArray[i]); - } - intentState.operatorList.lastChunk = operatorListChunk.lastChunk; - // Notify all the rendering tasks there are more operators to be consumed. - for (i = 0; i < intentState.renderTasks.length; i++) { - intentState.renderTasks[i].operatorListChanged(); - } + paintImageMaskXObject: function CanvasGraphics_paintImageMaskXObject(img) { + var ctx = this.ctx; + var width = img.width, height = img.height; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; - if (operatorListChunk.lastChunk) { - intentState.receivingOperatorList = false; - this._tryCleanup(); + var glyph = this.processingType3; + + if (COMPILE_TYPE3_GLYPHS && glyph && glyph.compiled === undefined) { + if (width <= MAX_SIZE_TO_COMPILE && height <= MAX_SIZE_TO_COMPILE) { + glyph.compiled = + compileType3Glyph({data: img.data, width: width, height: height}); + } else { + glyph.compiled = null; + } } - } - }; - return PDFPageProxy; -})(); -/** - * PDF.js web worker abstraction, it controls instantiation of PDF documents and - * WorkerTransport for them. If creation of a web worker is not possible, - * a "fake" worker will be used instead. - * @class - */ -var PDFWorker = (function PDFWorkerClosure() { - var nextFakeWorkerId = 0; + if (glyph && glyph.compiled) { + glyph.compiled(ctx); + return; + } - // Loads worker code into main thread. - function setupFakeWorkerGlobal() { - if (!PDFJS.fakeWorkerFilesLoadedCapability) { - PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability(); - // In the developer build load worker_loader which in turn loads all the - // other files and resolves the promise. In production only the - // pdf.worker.js file is needed. - var loader = fakeWorkerFilesLoader || function (callback) { - Util.loadScript(PDFJS.workerSrc, callback); - }; - loader(function () { - PDFJS.fakeWorkerFilesLoadedCapability.resolve(); - }); - } - return PDFJS.fakeWorkerFilesLoadedCapability.promise; - } + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - function PDFWorker(name) { - this.name = name; - this.destroyed = false; + putBinaryImageMask(maskCtx, img); - this._readyCapability = createPromiseCapability(); - this._port = null; - this._webWorker = null; - this._messageHandler = null; - this._initialize(); - } + maskCtx.globalCompositeOperation = 'source-in'; - PDFWorker.prototype = /** @lends PDFWorker.prototype */ { - get promise() { - return this._readyCapability.promise; - }, + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); - get port() { - return this._port; - }, + maskCtx.restore(); - get messageHandler() { - return this._messageHandler; + this.paintInlineImageXObject(maskCanvas.canvas); }, - _initialize: function PDFWorker_initialize() { - // If worker support isn't disabled explicit and the browser has worker - // support, create a new web worker and test if it/the browser fullfills - // all requirements to run parts of pdf.js in a web worker. - // Right now, the requirement is, that an Uint8Array is still an - // Uint8Array as it arrives on the worker. (Chrome added this with v.15.) - if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') { - var workerSrc = PDFJS.workerSrc; - if (!workerSrc) { - error('No PDFJS.workerSrc specified'); - } + paintImageMaskXObjectRepeat: + function CanvasGraphics_paintImageMaskXObjectRepeat(imgData, scaleX, + scaleY, positions) { + var width = imgData.width; + var height = imgData.height; + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; - try { - // Some versions of FF can't create a worker on localhost, see: - // https://bugzilla.mozilla.org/show_bug.cgi?id=683280 - var worker = new Worker(workerSrc); - var messageHandler = new MessageHandler('main', 'worker', worker); + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - messageHandler.on('test', function PDFWorker_test(data) { - if (this.destroyed) { - this._readyCapability.reject(new Error('Worker was destroyed')); - messageHandler.destroy(); - worker.terminate(); - return; // worker was destroyed - } - var supportTypedArray = data && data.supportTypedArray; - if (supportTypedArray) { - this._messageHandler = messageHandler; - this._port = worker; - this._webWorker = worker; - if (!data.supportTransfers) { - PDFJS.postMessageTransfers = false; - } - this._readyCapability.resolve(); - } else { - this._setupFakeWorker(); - messageHandler.destroy(); - worker.terminate(); - } - }.bind(this)); + putBinaryImageMask(maskCtx, imgData); - messageHandler.on('console_log', function (data) { - console.log.apply(console, data); - }); - messageHandler.on('console_error', function (data) { - console.error.apply(console, data); - }); + maskCtx.globalCompositeOperation = 'source-in'; - var testObj = new Uint8Array([PDFJS.postMessageTransfers ? 255 : 0]); - // Some versions of Opera throw a DATA_CLONE_ERR on serializing the - // typed array. Also, checking if we can use transfers. - try { - messageHandler.send('test', testObj, [testObj.buffer]); - } catch (ex) { - info('Cannot use postMessage transfers'); - testObj[0] = 0; - messageHandler.send('test', testObj); - } - return; - } catch (e) { - info('The worker has been disabled.'); - } + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + var ctx = this.ctx; + for (var i = 0, ii = positions.length; i < ii; i += 2) { + ctx.save(); + ctx.transform(scaleX, 0, 0, scaleY, positions[i], positions[i + 1]); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); } - // Either workers are disabled, not supported or have thrown an exception. - // Thus, we fallback to a faked worker. - this._setupFakeWorker(); }, - _setupFakeWorker: function PDFWorker_setupFakeWorker() { - if (!globalScope.PDFJS.disableWorker) { - warn('Setting up fake worker.'); - globalScope.PDFJS.disableWorker = true; - } + paintImageMaskXObjectGroup: + function CanvasGraphics_paintImageMaskXObjectGroup(images) { + var ctx = this.ctx; - setupFakeWorkerGlobal().then(function () { - if (this.destroyed) { - this._readyCapability.reject(new Error('Worker was destroyed')); - return; - } + var fillColor = this.current.fillColor; + var isPatternFill = this.current.patternFill; + for (var i = 0, ii = images.length; i < ii; i++) { + var image = images[i]; + var width = image.width, height = image.height; - // If we don't use a worker, just post/sendMessage to the main thread. - var port = { - _listeners: [], - postMessage: function (obj) { - var e = {data: obj}; - this._listeners.forEach(function (listener) { - listener.call(this, e); - }, this); - }, - addEventListener: function (name, listener) { - this._listeners.push(listener); - }, - removeEventListener: function (name, listener) { - var i = this._listeners.indexOf(listener); - this._listeners.splice(i, 1); - }, - terminate: function () {} - }; - this._port = port; + var maskCanvas = this.cachedCanvases.getCanvas('maskCanvas', + width, height); + var maskCtx = maskCanvas.context; + maskCtx.save(); - // All fake workers use the same port, making id unique. - var id = 'fake' + (nextFakeWorkerId++); + putBinaryImageMask(maskCtx, image); - // If the main thread is our worker, setup the handling for the - // messages -- the main thread sends to it self. - var workerHandler = new MessageHandler(id + '_worker', id, port); - PDFJS.WorkerMessageHandler.setup(workerHandler, port); + maskCtx.globalCompositeOperation = 'source-in'; - var messageHandler = new MessageHandler(id, id + '_worker', port); - this._messageHandler = messageHandler; - this._readyCapability.resolve(); - }.bind(this)); + maskCtx.fillStyle = isPatternFill ? + fillColor.getPattern(maskCtx, this) : fillColor; + maskCtx.fillRect(0, 0, width, height); + + maskCtx.restore(); + + ctx.save(); + ctx.transform.apply(ctx, image.transform); + ctx.scale(1, -1); + ctx.drawImage(maskCanvas.canvas, 0, 0, width, height, + 0, -1, 1, 1); + ctx.restore(); + } }, - /** - * Destroys the worker instance. - */ - destroy: function PDFWorker_destroy() { - this.destroyed = true; - if (this._webWorker) { - // We need to terminate only web worker created resource. - this._webWorker.terminate(); - this._webWorker = null; + paintImageXObject: function CanvasGraphics_paintImageXObject(objId) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; } - this._port = null; - if (this._messageHandler) { - this._messageHandler.destroy(); - this._messageHandler = null; + + this.paintInlineImageXObject(imgData); + }, + + paintImageXObjectRepeat: + function CanvasGraphics_paintImageXObjectRepeat(objId, scaleX, scaleY, + positions) { + var imgData = this.objs.get(objId); + if (!imgData) { + warn('Dependent image isn\'t ready yet'); + return; } - } - }; - return PDFWorker; -})(); -PDFJS.PDFWorker = PDFWorker; + var width = imgData.width; + var height = imgData.height; + var map = []; + for (var i = 0, ii = positions.length; i < ii; i += 2) { + map.push({transform: [scaleX, 0, 0, scaleY, positions[i], + positions[i + 1]], x: 0, y: 0, w: width, h: height}); + } + this.paintInlineImageXObjectGroup(imgData, map); + }, -/** - * For internal use only. - * @ignore - */ -var WorkerTransport = (function WorkerTransportClosure() { - function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) { - this.messageHandler = messageHandler; - this.loadingTask = loadingTask; - this.pdfDataRangeTransport = pdfDataRangeTransport; - this.commonObjs = new PDFObjects(); - this.fontLoader = new FontLoader(loadingTask.docId); + paintInlineImageXObject: + function CanvasGraphics_paintInlineImageXObject(imgData) { + var width = imgData.width; + var height = imgData.height; + var ctx = this.ctx; - this.destroyed = false; - this.destroyCapability = null; + this.save(); + // scale the image to the unit square + ctx.scale(1 / width, -1 / height); - this.pageCache = []; - this.pagePromises = []; - this.downloadInfoCapability = createPromiseCapability(); + var currentTransform = ctx.mozCurrentTransformInverse; + var a = currentTransform[0], b = currentTransform[1]; + var widthScale = Math.max(Math.sqrt(a * a + b * b), 1); + var c = currentTransform[2], d = currentTransform[3]; + var heightScale = Math.max(Math.sqrt(c * c + d * d), 1); - this.setupMessageHandler(); - } - WorkerTransport.prototype = { - destroy: function WorkerTransport_destroy() { - if (this.destroyCapability) { - return this.destroyCapability.promise; + var imgToPaint, tmpCanvas; + // instanceof HTMLElement does not work in jsdom node.js module + if (imgData instanceof HTMLElement || !imgData.data) { + imgToPaint = imgData; + } else { + tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', + width, height); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); + imgToPaint = tmpCanvas.canvas; } - this.destroyed = true; - this.destroyCapability = createPromiseCapability(); - - var waitOn = []; - // We need to wait for all renderings to be completed, e.g. - // timeout/rAF can take a long time. - this.pageCache.forEach(function (page) { - if (page) { - waitOn.push(page._destroy()); - } - }); - this.pageCache = []; - this.pagePromises = []; - var self = this; - // We also need to wait for the worker to finish its long running tasks. - var terminated = this.messageHandler.sendWithPromise('Terminate', null); - waitOn.push(terminated); - Promise.all(waitOn).then(function () { - self.fontLoader.clear(); - if (self.pdfDataRangeTransport) { - self.pdfDataRangeTransport.abort(); - self.pdfDataRangeTransport = null; + var paintWidth = width, paintHeight = height; + var tmpCanvasId = 'prescale1'; + // Vertial or horizontal scaling shall not be more than 2 to not loose the + // pixels during drawImage operation, painting on the temporary canvas(es) + // that are twice smaller in size + while ((widthScale > 2 && paintWidth > 1) || + (heightScale > 2 && paintHeight > 1)) { + var newWidth = paintWidth, newHeight = paintHeight; + if (widthScale > 2 && paintWidth > 1) { + newWidth = Math.ceil(paintWidth / 2); + widthScale /= paintWidth / newWidth; } - if (self.messageHandler) { - self.messageHandler.destroy(); - self.messageHandler = null; + if (heightScale > 2 && paintHeight > 1) { + newHeight = Math.ceil(paintHeight / 2); + heightScale /= paintHeight / newHeight; } - self.destroyCapability.resolve(); - }, this.destroyCapability.reject); - return this.destroyCapability.promise; - }, - - setupMessageHandler: - function WorkerTransport_setupMessageHandler() { - var messageHandler = this.messageHandler; - - function updatePassword(password) { - messageHandler.send('UpdatePassword', password); + tmpCanvas = this.cachedCanvases.getCanvas(tmpCanvasId, + newWidth, newHeight); + tmpCtx = tmpCanvas.context; + tmpCtx.clearRect(0, 0, newWidth, newHeight); + tmpCtx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, 0, newWidth, newHeight); + imgToPaint = tmpCanvas.canvas; + paintWidth = newWidth; + paintHeight = newHeight; + tmpCanvasId = tmpCanvasId === 'prescale1' ? 'prescale2' : 'prescale1'; } + ctx.drawImage(imgToPaint, 0, 0, paintWidth, paintHeight, + 0, -height, width, height); - var pdfDataRangeTransport = this.pdfDataRangeTransport; - if (pdfDataRangeTransport) { - pdfDataRangeTransport.addRangeListener(function(begin, chunk) { - messageHandler.send('OnDataRange', { - begin: begin, - chunk: chunk - }); + if (this.imageLayer) { + var position = this.getCanvasPosition(0, -height); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: width / currentTransform[0], + height: height / currentTransform[3] }); + } + this.restore(); + }, - pdfDataRangeTransport.addProgressListener(function(loaded) { - messageHandler.send('OnDataProgress', { - loaded: loaded - }); - }); + paintInlineImageXObjectGroup: + function CanvasGraphics_paintInlineImageXObjectGroup(imgData, map) { + var ctx = this.ctx; + var w = imgData.width; + var h = imgData.height; - pdfDataRangeTransport.addProgressiveReadListener(function(chunk) { - messageHandler.send('OnDataRange', { - chunk: chunk - }); - }); + var tmpCanvas = this.cachedCanvases.getCanvas('inlineImage', w, h); + var tmpCtx = tmpCanvas.context; + putBinaryImageData(tmpCtx, imgData); - messageHandler.on('RequestDataRange', - function transportDataRange(data) { - pdfDataRangeTransport.requestDataRange(data.begin, data.end); - }, this); + for (var i = 0, ii = map.length; i < ii; i++) { + var entry = map[i]; + ctx.save(); + ctx.transform.apply(ctx, entry.transform); + ctx.scale(1, -1); + ctx.drawImage(tmpCanvas.canvas, entry.x, entry.y, entry.w, entry.h, + 0, -1, 1, 1); + if (this.imageLayer) { + var position = this.getCanvasPosition(entry.x, entry.y); + this.imageLayer.appendImage({ + imgData: imgData, + left: position[0], + top: position[1], + width: w, + height: h + }); + } + ctx.restore(); } + }, - messageHandler.on('GetDoc', function transportDoc(data) { - var pdfInfo = data.pdfInfo; - this.numPages = data.pdfInfo.numPages; - var loadingTask = this.loadingTask; - var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask); - this.pdfDocument = pdfDocument; - loadingTask._capability.resolve(pdfDocument); - }, this); - - messageHandler.on('NeedPassword', - function transportNeedPassword(exception) { - var loadingTask = this.loadingTask; - if (loadingTask.onPassword) { - return loadingTask.onPassword(updatePassword, - PasswordResponses.NEED_PASSWORD); - } - loadingTask._capability.reject( - new PasswordException(exception.message, exception.code)); - }, this); + paintSolidColorImageMask: + function CanvasGraphics_paintSolidColorImageMask() { + this.ctx.fillRect(0, 0, 1, 1); + }, - messageHandler.on('IncorrectPassword', - function transportIncorrectPassword(exception) { - var loadingTask = this.loadingTask; - if (loadingTask.onPassword) { - return loadingTask.onPassword(updatePassword, - PasswordResponses.INCORRECT_PASSWORD); - } - loadingTask._capability.reject( - new PasswordException(exception.message, exception.code)); - }, this); + paintXObject: function CanvasGraphics_paintXObject() { + warn('Unsupported \'paintXObject\' command.'); + }, - messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) { - this.loadingTask._capability.reject( - new InvalidPDFException(exception.message)); - }, this); + // Marked content - messageHandler.on('MissingPDF', function transportMissingPDF(exception) { - this.loadingTask._capability.reject( - new MissingPDFException(exception.message)); - }, this); + markPoint: function CanvasGraphics_markPoint(tag) { + // TODO Marked content. + }, + markPointProps: function CanvasGraphics_markPointProps(tag, properties) { + // TODO Marked content. + }, + beginMarkedContent: function CanvasGraphics_beginMarkedContent(tag) { + // TODO Marked content. + }, + beginMarkedContentProps: function CanvasGraphics_beginMarkedContentProps( + tag, properties) { + // TODO Marked content. + }, + endMarkedContent: function CanvasGraphics_endMarkedContent() { + // TODO Marked content. + }, - messageHandler.on('UnexpectedResponse', - function transportUnexpectedResponse(exception) { - this.loadingTask._capability.reject( - new UnexpectedResponseException(exception.message, exception.status)); - }, this); + // Compatibility - messageHandler.on('UnknownError', - function transportUnknownError(exception) { - this.loadingTask._capability.reject( - new UnknownErrorException(exception.message, exception.details)); - }, this); + beginCompat: function CanvasGraphics_beginCompat() { + // TODO ignore undefined operators (should we do that anyway?) + }, + endCompat: function CanvasGraphics_endCompat() { + // TODO stop ignoring undefined operators + }, - messageHandler.on('DataLoaded', function transportPage(data) { - this.downloadInfoCapability.resolve(data); - }, this); + // Helper functions - messageHandler.on('PDFManagerReady', function transportPage(data) { - if (this.pdfDataRangeTransport) { - this.pdfDataRangeTransport.transportReady(); + consumePath: function CanvasGraphics_consumePath() { + var ctx = this.ctx; + if (this.pendingClip) { + if (this.pendingClip === EO_CLIP) { + if (ctx.mozFillRule !== undefined) { + ctx.mozFillRule = 'evenodd'; + ctx.clip(); + ctx.mozFillRule = 'nonzero'; + } else { + ctx.clip('evenodd'); + } + } else { + ctx.clip(); } - }, this); + this.pendingClip = null; + } + ctx.beginPath(); + }, + getSinglePixelWidth: function CanvasGraphics_getSinglePixelWidth(scale) { + if (this.cachedGetSinglePixelWidth === null) { + var inverse = this.ctx.mozCurrentTransformInverse; + // max of the current horizontal and vertical scale + this.cachedGetSinglePixelWidth = Math.sqrt(Math.max( + (inverse[0] * inverse[0] + inverse[1] * inverse[1]), + (inverse[2] * inverse[2] + inverse[3] * inverse[3]))); + } + return this.cachedGetSinglePixelWidth; + }, + getCanvasPosition: function CanvasGraphics_getCanvasPosition(x, y) { + var transform = this.ctx.mozCurrentTransform; + return [ + transform[0] * x + transform[2] * y + transform[4], + transform[1] * x + transform[3] * y + transform[5] + ]; + } + }; + + for (var op in OPS) { + CanvasGraphics.prototype[OPS[op]] = CanvasGraphics.prototype[op]; + } + + return CanvasGraphics; +})(); + +exports.CanvasGraphics = CanvasGraphics; +exports.createScratchCanvas = createScratchCanvas; +})); - messageHandler.on('StartRenderPage', function transportRender(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var page = this.pageCache[data.pageIndex]; - page.stats.timeEnd('Page Request'); - page._startRenderPage(data.transparency, data.intent); - }, this); +(function (root, factory) { + { + factory((root.pdfjsDisplayAPI = {}), root.pdfjsSharedUtil, + root.pdfjsDisplayFontLoader, root.pdfjsDisplayCanvas, + root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedUtil, displayFontLoader, displayCanvas, + sharedGlobal, amdRequire) { - messageHandler.on('RenderPageChunk', function transportRender(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var page = this.pageCache[data.pageIndex]; +var InvalidPDFException = sharedUtil.InvalidPDFException; +var MessageHandler = sharedUtil.MessageHandler; +var MissingPDFException = sharedUtil.MissingPDFException; +var PasswordResponses = sharedUtil.PasswordResponses; +var PasswordException = sharedUtil.PasswordException; +var StatTimer = sharedUtil.StatTimer; +var UnexpectedResponseException = sharedUtil.UnexpectedResponseException; +var UnknownErrorException = sharedUtil.UnknownErrorException; +var Util = sharedUtil.Util; +var createPromiseCapability = sharedUtil.createPromiseCapability; +var combineUrl = sharedUtil.combineUrl; +var error = sharedUtil.error; +var deprecated = sharedUtil.deprecated; +var info = sharedUtil.info; +var isArrayBuffer = sharedUtil.isArrayBuffer; +var loadJpegStream = sharedUtil.loadJpegStream; +var stringToBytes = sharedUtil.stringToBytes; +var warn = sharedUtil.warn; +var FontFaceObject = displayFontLoader.FontFaceObject; +var FontLoader = displayFontLoader.FontLoader; +var CanvasGraphics = displayCanvas.CanvasGraphics; +var createScratchCanvas = displayCanvas.createScratchCanvas; +var PDFJS = sharedGlobal.PDFJS; +var globalScope = sharedGlobal.globalScope; - page._renderPageChunk(data.operatorList, data.intent); - }, this); +var DEFAULT_RANGE_CHUNK_SIZE = 65536; // 2^16 = 65536 - messageHandler.on('commonobj', function transportObj(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var id = data[0]; - var type = data[1]; - if (this.commonObjs.hasData(id)) { - return; - } +var useRequireEnsure = false; +if (typeof module !== 'undefined' && module.require) { + // node.js - disable worker and set require.ensure. + PDFJS.disableWorker = true; + if (typeof require.ensure === 'undefined') { + require.ensure = require('node-ensure'); + } + useRequireEnsure = true; +} +if (typeof __webpack_require__ !== 'undefined') { + // Webpack - get/bundle pdf.worker.js as additional file. + PDFJS.workerSrc = require('entry?name=[hash]-worker.js!./pdf.worker.js'); + useRequireEnsure = true; +} +var fakeWorkerFilesLoader = useRequireEnsure && function (callback) { + require.ensure([], function () { + require('./pdf.worker.js'); + callback(); + }); +}; - switch (type) { - case 'Font': - var exportedData = data[2]; - var font; - if ('error' in exportedData) { - var error = exportedData.error; - warn('Error during font loading: ' + error); - this.commonObjs.resolve(id, error); - break; - } else { - font = new FontFaceObject(exportedData); - } +/** + * The maximum allowed image size in total pixels e.g. width * height. Images + * above this value will not be drawn. Use -1 for no limit. + * @var {number} + */ +PDFJS.maxImageSize = (PDFJS.maxImageSize === undefined ? + -1 : PDFJS.maxImageSize); - this.fontLoader.bind( - [font], - function fontReady(fontObjs) { - this.commonObjs.resolve(id, font); - }.bind(this) - ); - break; - case 'FontPath': - this.commonObjs.resolve(id, data[2]); - break; - default: - error('Got unknown common object type ' + type); - } - }, this); +/** + * The url of where the predefined Adobe CMaps are located. Include trailing + * slash. + * @var {string} + */ +PDFJS.cMapUrl = (PDFJS.cMapUrl === undefined ? null : PDFJS.cMapUrl); - messageHandler.on('obj', function transportObj(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } +/** + * Specifies if CMaps are binary packed. + * @var {boolean} + */ +PDFJS.cMapPacked = PDFJS.cMapPacked === undefined ? false : PDFJS.cMapPacked; - var id = data[0]; - var pageIndex = data[1]; - var type = data[2]; - var pageProxy = this.pageCache[pageIndex]; - var imageData; - if (pageProxy.objs.hasData(id)) { - return; - } +/** + * By default fonts are converted to OpenType fonts and loaded via font face + * rules. If disabled, the font will be rendered using a built in font renderer + * that constructs the glyphs with primitive path commands. + * @var {boolean} + */ +PDFJS.disableFontFace = (PDFJS.disableFontFace === undefined ? + false : PDFJS.disableFontFace); - switch (type) { - case 'JpegStream': - imageData = data[3]; - loadJpegStream(id, imageData, pageProxy.objs); - break; - case 'Image': - imageData = data[3]; - pageProxy.objs.resolve(id, imageData); +/** + * Path for image resources, mainly for annotation icons. Include trailing + * slash. + * @var {string} + */ +PDFJS.imageResourcesPath = (PDFJS.imageResourcesPath === undefined ? + '' : PDFJS.imageResourcesPath); - // heuristics that will allow not to store large data - var MAX_IMAGE_SIZE_TO_STORE = 8000000; - if (imageData && 'data' in imageData && - imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) { - pageProxy.cleanupAfterRender = true; - } - break; - default: - error('Got unknown object type ' + type); - } - }, this); +/** + * Disable the web worker and run all code on the main thread. This will happen + * automatically if the browser doesn't support workers or sending typed arrays + * to workers. + * @var {boolean} + */ +PDFJS.disableWorker = (PDFJS.disableWorker === undefined ? + false : PDFJS.disableWorker); - messageHandler.on('DocProgress', function transportDocProgress(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } +/** + * Path and filename of the worker file. Required when the worker is enabled in + * development mode. If unspecified in the production build, the worker will be + * loaded based on the location of the pdf.js file. It is recommended that + * the workerSrc is set in a custom application to prevent issues caused by + * third-party frameworks and libraries. + * @var {string} + */ +PDFJS.workerSrc = (PDFJS.workerSrc === undefined ? null : PDFJS.workerSrc); - var loadingTask = this.loadingTask; - if (loadingTask.onProgress) { - loadingTask.onProgress({ - loaded: data.loaded, - total: data.total - }); - } - }, this); +/** + * Disable range request loading of PDF files. When enabled and if the server + * supports partial content requests then the PDF will be fetched in chunks. + * Enabled (false) by default. + * @var {boolean} + */ +PDFJS.disableRange = (PDFJS.disableRange === undefined ? + false : PDFJS.disableRange); - messageHandler.on('PageError', function transportError(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } +/** + * Disable streaming of PDF file data. By default PDF.js attempts to load PDF + * in chunks. This default behavior can be disabled. + * @var {boolean} + */ +PDFJS.disableStream = (PDFJS.disableStream === undefined ? + false : PDFJS.disableStream); - var page = this.pageCache[data.pageNum - 1]; - var intentState = page.intentStates[data.intent]; - if (intentState.displayReadyCapability) { - intentState.displayReadyCapability.reject(data.error); - } else { - error(data.error); - } - }, this); +/** + * Disable pre-fetching of PDF file data. When range requests are enabled PDF.js + * will automatically keep fetching more data even if it isn't needed to display + * the current page. This default behavior can be disabled. + * + * NOTE: It is also necessary to disable streaming, see above, + * in order for disabling of pre-fetching to work correctly. + * @var {boolean} + */ +PDFJS.disableAutoFetch = (PDFJS.disableAutoFetch === undefined ? + false : PDFJS.disableAutoFetch); - messageHandler.on('UnsupportedFeature', - function transportUnsupportedFeature(data) { - if (this.destroyed) { - return; // Ignore any pending requests if the worker was terminated. - } - var featureId = data.featureId; - var loadingTask = this.loadingTask; - if (loadingTask.onUnsupportedFeature) { - loadingTask.onUnsupportedFeature(featureId); - } - PDFJS.UnsupportedManager.notify(featureId); - }, this); +/** + * Enables special hooks for debugging PDF.js. + * @var {boolean} + */ +PDFJS.pdfBug = (PDFJS.pdfBug === undefined ? false : PDFJS.pdfBug); + +/** + * Enables transfer usage in postMessage for ArrayBuffers. + * @var {boolean} + */ +PDFJS.postMessageTransfers = (PDFJS.postMessageTransfers === undefined ? + true : PDFJS.postMessageTransfers); - messageHandler.on('JpegDecode', function(data) { - if (this.destroyed) { - return Promise.reject('Worker was terminated'); - } +/** + * Disables URL.createObjectURL usage. + * @var {boolean} + */ +PDFJS.disableCreateObjectURL = (PDFJS.disableCreateObjectURL === undefined ? + false : PDFJS.disableCreateObjectURL); - var imageUrl = data[0]; - var components = data[1]; - if (components !== 3 && components !== 1) { - return Promise.reject( - new Error('Only 3 components or 1 component can be returned')); - } +/** + * Disables WebGL usage. + * @var {boolean} + */ +PDFJS.disableWebGL = (PDFJS.disableWebGL === undefined ? + true : PDFJS.disableWebGL); - return new Promise(function (resolve, reject) { - var img = new Image(); - img.onload = function () { - var width = img.width; - var height = img.height; - var size = width * height; - var rgbaLength = size * 4; - var buf = new Uint8Array(size * components); - var tmpCanvas = createScratchCanvas(width, height); - var tmpCtx = tmpCanvas.getContext('2d'); - tmpCtx.drawImage(img, 0, 0); - var data = tmpCtx.getImageData(0, 0, width, height).data; - var i, j; +/** + * Disables fullscreen support, and by extension Presentation Mode, + * in browsers which support the fullscreen API. + * @var {boolean} + */ +PDFJS.disableFullscreen = (PDFJS.disableFullscreen === undefined ? + false : PDFJS.disableFullscreen); - if (components === 3) { - for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) { - buf[j] = data[i]; - buf[j + 1] = data[i + 1]; - buf[j + 2] = data[i + 2]; - } - } else if (components === 1) { - for (i = 0, j = 0; i < rgbaLength; i += 4, j++) { - buf[j] = data[i]; - } - } - resolve({ data: buf, width: width, height: height}); - }; - img.onerror = function () { - reject(new Error('JpegDecode failed to load image')); - }; - img.src = imageUrl; - }); - }, this); - }, +/** + * Enables CSS only zooming. + * @var {boolean} + */ +PDFJS.useOnlyCssZoom = (PDFJS.useOnlyCssZoom === undefined ? + false : PDFJS.useOnlyCssZoom); - getData: function WorkerTransport_getData() { - return this.messageHandler.sendWithPromise('GetData', null); - }, +/** + * Controls the logging level. + * The constants from PDFJS.VERBOSITY_LEVELS should be used: + * - errors + * - warnings [default] + * - infos + * @var {number} + */ +PDFJS.verbosity = (PDFJS.verbosity === undefined ? + PDFJS.VERBOSITY_LEVELS.warnings : PDFJS.verbosity); - getPage: function WorkerTransport_getPage(pageNumber, capability) { - if (pageNumber <= 0 || pageNumber > this.numPages || - (pageNumber|0) !== pageNumber) { - return Promise.reject(new Error('Invalid page request')); - } +/** + * The maximum supported canvas size in total pixels e.g. width * height. + * The default value is 4096 * 4096. Use -1 for no limit. + * @var {number} + */ +PDFJS.maxCanvasPixels = (PDFJS.maxCanvasPixels === undefined ? + 16777216 : PDFJS.maxCanvasPixels); - var pageIndex = pageNumber - 1; - if (pageIndex in this.pagePromises) { - return this.pagePromises[pageIndex]; - } - var promise = this.messageHandler.sendWithPromise('GetPage', { - pageIndex: pageIndex - }).then(function (pageInfo) { - if (this.destroyed) { - throw new Error('Transport destroyed'); - } - var page = new PDFPageProxy(pageIndex, pageInfo, this); - this.pageCache[pageIndex] = page; - return page; - }.bind(this)); - this.pagePromises[pageIndex] = promise; - return promise; - }, +/** + * (Deprecated) Opens external links in a new window if enabled. + * The default behavior opens external links in the PDF.js window. + * + * NOTE: This property has been deprecated, please use + * `PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK` instead. + * @var {boolean} + */ +PDFJS.openExternalLinksInNewWindow = ( + PDFJS.openExternalLinksInNewWindow === undefined ? + false : PDFJS.openExternalLinksInNewWindow); - getPageIndex: function WorkerTransport_getPageIndexByRef(ref) { - return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }); - }, +/** + * Specifies the |target| attribute for external links. + * The constants from PDFJS.LinkTarget should be used: + * - NONE [default] + * - SELF + * - BLANK + * - PARENT + * - TOP + * @var {number} + */ +PDFJS.externalLinkTarget = (PDFJS.externalLinkTarget === undefined ? + PDFJS.LinkTarget.NONE : PDFJS.externalLinkTarget); - getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) { - return this.messageHandler.sendWithPromise('GetAnnotations', { - pageIndex: pageIndex, - intent: intent, - }); - }, +/** + * Specifies the |rel| attribute for external links. Defaults to stripping + * the referrer. + * @var {string} + */ +PDFJS.externalLinkRel = (PDFJS.externalLinkRel === undefined ? + 'noreferrer' : PDFJS.externalLinkRel); - getDestinations: function WorkerTransport_getDestinations() { - return this.messageHandler.sendWithPromise('GetDestinations', null); - }, +/** + * Determines if we can eval strings as JS. Primarily used to improve + * performance for font rendering. + * @var {boolean} + */ +PDFJS.isEvalSupported = (PDFJS.isEvalSupported === undefined ? + true : PDFJS.isEvalSupported); - getDestination: function WorkerTransport_getDestination(id) { - return this.messageHandler.sendWithPromise('GetDestination', { id: id }); - }, +/** + * Document initialization / loading parameters object. + * + * @typedef {Object} DocumentInitParameters + * @property {string} url - The URL of the PDF. + * @property {TypedArray|Array|string} data - Binary PDF data. Use typed arrays + * (Uint8Array) to improve the memory usage. If PDF data is BASE64-encoded, + * use atob() to convert it to a binary string first. + * @property {Object} httpHeaders - Basic authentication headers. + * @property {boolean} withCredentials - Indicates whether or not cross-site + * Access-Control requests should be made using credentials such as cookies + * or authorization headers. The default is false. + * @property {string} password - For decrypting password-protected PDFs. + * @property {TypedArray} initialData - A typed array with the first portion or + * all of the pdf data. Used by the extension since some data is already + * loaded before the switch to range requests. + * @property {number} length - The PDF file length. It's used for progress + * reports and range requests operations. + * @property {PDFDataRangeTransport} range + * @property {number} rangeChunkSize - Optional parameter to specify + * maximum number of bytes fetched per range request. The default value is + * 2^16 = 65536. + * @property {PDFWorker} worker - The worker that will be used for the loading + * and parsing of the PDF data. + */ - getAttachments: function WorkerTransport_getAttachments() { - return this.messageHandler.sendWithPromise('GetAttachments', null); - }, +/** + * @typedef {Object} PDFDocumentStats + * @property {Array} streamTypes - Used stream types in the document (an item + * is set to true if specific stream ID was used in the document). + * @property {Array} fontTypes - Used font type in the document (an item is set + * to true if specific font ID was used in the document). + */ - getJavaScript: function WorkerTransport_getJavaScript() { - return this.messageHandler.sendWithPromise('GetJavaScript', null); - }, +/** + * This is the main entry point for loading a PDF and interacting with it. + * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR) + * is used, which means it must follow the same origin rules that any XHR does + * e.g. No cross domain requests without CORS. + * + * @param {string|TypedArray|DocumentInitParameters|PDFDataRangeTransport} src + * Can be a url to where a PDF is located, a typed array (Uint8Array) + * already populated with data or parameter object. + * + * @param {PDFDataRangeTransport} pdfDataRangeTransport (deprecated) It is used + * if you want to manually serve range requests for data in the PDF. + * + * @param {function} passwordCallback (deprecated) It is used to request a + * password if wrong or no password was provided. The callback receives two + * parameters: function that needs to be called with new password and reason + * (see {PasswordResponses}). + * + * @param {function} progressCallback (deprecated) It is used to be able to + * monitor the loading progress of the PDF file (necessary to implement e.g. + * a loading bar). The callback receives an {Object} with the properties: + * {number} loaded and {number} total. + * + * @return {PDFDocumentLoadingTask} + */ +PDFJS.getDocument = function getDocument(src, + pdfDataRangeTransport, + passwordCallback, + progressCallback) { + var task = new PDFDocumentLoadingTask(); + + // Support of the obsolete arguments (for compatibility with API v1.0) + if (arguments.length > 1) { + deprecated('getDocument is called with pdfDataRangeTransport, ' + + 'passwordCallback or progressCallback argument'); + } + if (pdfDataRangeTransport) { + if (!(pdfDataRangeTransport instanceof PDFDataRangeTransport)) { + // Not a PDFDataRangeTransport instance, trying to add missing properties. + pdfDataRangeTransport = Object.create(pdfDataRangeTransport); + pdfDataRangeTransport.length = src.length; + pdfDataRangeTransport.initialData = src.initialData; + if (!pdfDataRangeTransport.abort) { + pdfDataRangeTransport.abort = function () {}; + } + } + src = Object.create(src); + src.range = pdfDataRangeTransport; + } + task.onPassword = passwordCallback || null; + task.onProgress = progressCallback || null; - getOutline: function WorkerTransport_getOutline() { - return this.messageHandler.sendWithPromise('GetOutline', null); - }, + var source; + if (typeof src === 'string') { + source = { url: src }; + } else if (isArrayBuffer(src)) { + source = { data: src }; + } else if (src instanceof PDFDataRangeTransport) { + source = { range: src }; + } else { + if (typeof src !== 'object') { + error('Invalid parameter in getDocument, need either Uint8Array, ' + + 'string or a parameter object'); + } + if (!src.url && !src.data && !src.range) { + error('Invalid parameter object: need either .data, .range or .url'); + } - getMetadata: function WorkerTransport_getMetadata() { - return this.messageHandler.sendWithPromise('GetMetadata', null). - then(function transportMetadata(results) { - return { - info: results[0], - metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) - }; - }); - }, + source = src; + } - getStats: function WorkerTransport_getStats() { - return this.messageHandler.sendWithPromise('GetStats', null); - }, + var params = {}; + var rangeTransport = null; + var worker = null; + for (var key in source) { + if (key === 'url' && typeof window !== 'undefined') { + // The full path is required in the 'url' field. + params[key] = combineUrl(window.location.href, source[key]); + continue; + } else if (key === 'range') { + rangeTransport = source[key]; + continue; + } else if (key === 'worker') { + worker = source[key]; + continue; + } else if (key === 'data' && !(source[key] instanceof Uint8Array)) { + // Converting string or array-like data to Uint8Array. + var pdfBytes = source[key]; + if (typeof pdfBytes === 'string') { + params[key] = stringToBytes(pdfBytes); + } else if (typeof pdfBytes === 'object' && pdfBytes !== null && + !isNaN(pdfBytes.length)) { + params[key] = new Uint8Array(pdfBytes); + } else if (isArrayBuffer(pdfBytes)) { + params[key] = new Uint8Array(pdfBytes); + } else { + error('Invalid PDF binary data: either typed array, string or ' + + 'array-like object is expected in the data property.'); + } + continue; + } + params[key] = source[key]; + } - startCleanup: function WorkerTransport_startCleanup() { - this.messageHandler.sendWithPromise('Cleanup', null). - then(function endCleanup() { - for (var i = 0, ii = this.pageCache.length; i < ii; i++) { - var page = this.pageCache[i]; - if (page) { - page.cleanup(); - } - } - this.commonObjs.clear(); - this.fontLoader.clear(); - }.bind(this)); + params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE; + + if (!worker) { + // Worker was not provided -- creating and owning our own. + worker = new PDFWorker(); + task._worker = worker; + } + var docId = task.docId; + worker.promise.then(function () { + if (task.destroyed) { + throw new Error('Loading aborted'); } - }; - return WorkerTransport; + return _fetchDocument(worker, params, rangeTransport, docId).then( + function (workerId) { + if (task.destroyed) { + throw new Error('Loading aborted'); + } + var messageHandler = new MessageHandler(docId, workerId, worker.port); + messageHandler.send('Ready', null); + var transport = new WorkerTransport(messageHandler, task, rangeTransport); + task._transport = transport; + }); + }).catch(task._capability.reject); -})(); + return task; +}; /** - * A PDF document and page is built of many objects. E.g. there are objects - * for fonts, images, rendering code and such. These objects might get processed - * inside of a worker. The `PDFObjects` implements some basic functions to - * manage these objects. - * @ignore + * Starts fetching of specified PDF document/data. + * @param {PDFWorker} worker + * @param {Object} source + * @param {PDFDataRangeTransport} pdfDataRangeTransport + * @param {string} docId Unique document id, used as MessageHandler id. + * @returns {Promise} The promise, which is resolved when worker id of + * MessageHandler is known. + * @private */ -var PDFObjects = (function PDFObjectsClosure() { - function PDFObjects() { - this.objs = {}; +function _fetchDocument(worker, source, pdfDataRangeTransport, docId) { + if (worker.destroyed) { + return Promise.reject(new Error('Worker was destroyed')); } - PDFObjects.prototype = { - /** - * Internal function. - * Ensures there is an object defined for `objId`. - */ - ensureObj: function PDFObjects_ensureObj(objId) { - if (this.objs[objId]) { - return this.objs[objId]; - } + source.disableAutoFetch = PDFJS.disableAutoFetch; + source.disableStream = PDFJS.disableStream; + source.chunkedViewerLoading = !!pdfDataRangeTransport; + if (pdfDataRangeTransport) { + source.length = pdfDataRangeTransport.length; + source.initialData = pdfDataRangeTransport.initialData; + } + return worker.messageHandler.sendWithPromise('GetDocRequest', { + docId: docId, + source: source, + disableRange: PDFJS.disableRange, + maxImageSize: PDFJS.maxImageSize, + cMapUrl: PDFJS.cMapUrl, + cMapPacked: PDFJS.cMapPacked, + disableFontFace: PDFJS.disableFontFace, + disableCreateObjectURL: PDFJS.disableCreateObjectURL, + verbosity: PDFJS.verbosity + }).then(function (workerId) { + if (worker.destroyed) { + throw new Error('Worker was destroyed'); + } + return workerId; + }); +} - var obj = { - capability: createPromiseCapability(), - data: null, - resolved: false - }; - this.objs[objId] = obj; +/** + * PDF document loading operation. + * @class + * @alias PDFDocumentLoadingTask + */ +var PDFDocumentLoadingTask = (function PDFDocumentLoadingTaskClosure() { + var nextDocumentId = 0; - return obj; - }, + /** @constructs PDFDocumentLoadingTask */ + function PDFDocumentLoadingTask() { + this._capability = createPromiseCapability(); + this._transport = null; + this._worker = null; /** - * If called *without* callback, this returns the data of `objId` but the - * object needs to be resolved. If it isn't, this function throws. - * - * If called *with* a callback, the callback is called with the data of the - * object once the object is resolved. That means, if you call this - * function and the object is already resolved, the callback gets called - * right away. + * Unique document loading task id -- used in MessageHandlers. + * @type {string} */ - get: function PDFObjects_get(objId, callback) { - // If there is a callback, then the get can be async and the object is - // not required to be resolved right now - if (callback) { - this.ensureObj(objId).capability.promise.then(callback); - return null; - } - - // If there isn't a callback, the user expects to get the resolved data - // directly. - var obj = this.objs[objId]; - - // If there isn't an object yet or the object isn't resolved, then the - // data isn't ready yet! - if (!obj || !obj.resolved) { - error('Requesting object that isn\'t resolved yet ' + objId); - } - - return obj.data; - }, + this.docId = 'd' + (nextDocumentId++); /** - * Resolves the object `objId` with optional `data`. + * Shows if loading task is destroyed. + * @type {boolean} */ - resolve: function PDFObjects_resolve(objId, data) { - var obj = this.ensureObj(objId); - - obj.resolved = true; - obj.data = data; - obj.capability.resolve(data); - }, - - isResolved: function PDFObjects_isResolved(objId) { - var objs = this.objs; - - if (!objs[objId]) { - return false; - } else { - return objs[objId].resolved; - } - }, - - hasData: function PDFObjects_hasData(objId) { - return this.isResolved(objId); - }, + this.destroyed = false; /** - * Returns the data of `objId` if object exists, null otherwise. - */ - getData: function PDFObjects_getData(objId) { - var objs = this.objs; - if (!objs[objId] || !objs[objId].resolved) { - return null; - } else { - return objs[objId].data; - } - }, - - clear: function PDFObjects_clear() { - this.objs = {}; - } - }; - return PDFObjects; -})(); - -/** - * Allows controlling of the rendering tasks. - * @class - * @alias RenderTask - */ -var RenderTask = (function RenderTaskClosure() { - function RenderTask(internalRenderTask) { - this._internalRenderTask = internalRenderTask; + * Callback to request a password if wrong or no password was provided. + * The callback receives two parameters: function that needs to be called + * with new password and reason (see {PasswordResponses}). + */ + this.onPassword = null; /** - * Callback for incremental rendering -- a function that will be called - * each time the rendering is paused. To continue rendering call the - * function that is the first argument to the callback. - * @type {function} + * Callback to be able to monitor the loading progress of the PDF file + * (necessary to implement e.g. a loading bar). The callback receives + * an {Object} with the properties: {number} loaded and {number} total. */ - this.onContinue = null; + this.onProgress = null; + + /** + * Callback to when unsupported feature is used. The callback receives + * an {PDFJS.UNSUPPORTED_FEATURES} argument. + */ + this.onUnsupportedFeature = null; } - RenderTask.prototype = /** @lends RenderTask.prototype */ { + PDFDocumentLoadingTask.prototype = + /** @lends PDFDocumentLoadingTask.prototype */ { /** - * Promise for rendering task completion. * @return {Promise} */ get promise() { - return this._internalRenderTask.capability.promise; + return this._capability.promise; }, /** - * Cancels the rendering task. If the task is currently rendering it will - * not be cancelled until graphics pauses with a timeout. The promise that - * this object extends will resolved when cancelled. + * Aborts all network requests and destroys worker. + * @return {Promise} A promise that is resolved after destruction activity + * is completed. */ - cancel: function RenderTask_cancel() { - this._internalRenderTask.cancel(); + destroy: function () { + this.destroyed = true; + + var transportDestroyed = !this._transport ? Promise.resolve() : + this._transport.destroy(); + return transportDestroyed.then(function () { + this._transport = null; + if (this._worker) { + this._worker.destroy(); + this._worker = null; + } + }.bind(this)); }, /** - * Registers callbacks to indicate the rendering task completion. + * Registers callbacks to indicate the document loading completion. * - * @param {function} onFulfilled The callback for the rendering completion. - * @param {function} onRejected The callback for the rendering failure. + * @param {function} onFulfilled The callback for the loading completion. + * @param {function} onRejected The callback for the loading failure. * @return {Promise} A promise that is resolved after the onFulfilled or * onRejected callback. */ - then: function RenderTask_then(onFulfilled, onRejected) { + then: function PDFDocumentLoadingTask_then(onFulfilled, onRejected) { return this.promise.then.apply(this.promise, arguments); } }; - return RenderTask; + return PDFDocumentLoadingTask; })(); /** - * For internal use only. - * @ignore + * Abstract class to support range requests file loading. + * @class + * @alias PDFJS.PDFDataRangeTransport + * @param {number} length + * @param {Uint8Array} initialData */ -var InternalRenderTask = (function InternalRenderTaskClosure() { +var PDFDataRangeTransport = (function pdfDataRangeTransportClosure() { + function PDFDataRangeTransport(length, initialData) { + this.length = length; + this.initialData = initialData; - function InternalRenderTask(callback, params, objs, commonObjs, operatorList, - pageNumber) { - this.callback = callback; - this.params = params; - this.objs = objs; - this.commonObjs = commonObjs; - this.operatorListIdx = null; - this.operatorList = operatorList; - this.pageNumber = pageNumber; - this.running = false; - this.graphicsReadyCallback = null; - this.graphicsReady = false; - this.useRequestAnimationFrame = false; - this.cancelled = false; - this.capability = createPromiseCapability(); - this.task = new RenderTask(this); - // caching this-bound methods - this._continueBound = this._continue.bind(this); - this._scheduleNextBound = this._scheduleNext.bind(this); - this._nextBound = this._next.bind(this); + this._rangeListeners = []; + this._progressListeners = []; + this._progressiveReadListeners = []; + this._readyCapability = createPromiseCapability(); } + PDFDataRangeTransport.prototype = + /** @lends PDFDataRangeTransport.prototype */ { + addRangeListener: + function PDFDataRangeTransport_addRangeListener(listener) { + this._rangeListeners.push(listener); + }, - InternalRenderTask.prototype = { + addProgressListener: + function PDFDataRangeTransport_addProgressListener(listener) { + this._progressListeners.push(listener); + }, - initalizeGraphics: - function InternalRenderTask_initalizeGraphics(transparency) { + addProgressiveReadListener: + function PDFDataRangeTransport_addProgressiveReadListener(listener) { + this._progressiveReadListeners.push(listener); + }, - if (this.cancelled) { - return; - } - if (PDFJS.pdfBug && 'StepperManager' in globalScope && - globalScope.StepperManager.enabled) { - this.stepper = globalScope.StepperManager.create(this.pageNumber - 1); - this.stepper.init(this.operatorList); - this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint(); + onDataRange: function PDFDataRangeTransport_onDataRange(begin, chunk) { + var listeners = this._rangeListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](begin, chunk); } + }, - var params = this.params; - this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, - this.objs, params.imageLayer); + onDataProgress: function PDFDataRangeTransport_onDataProgress(loaded) { + this._readyCapability.promise.then(function () { + var listeners = this._progressListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](loaded); + } + }.bind(this)); + }, - this.gfx.beginDrawing(params.transform, params.viewport, transparency); - this.operatorListIdx = 0; - this.graphicsReady = true; - if (this.graphicsReadyCallback) { - this.graphicsReadyCallback(); - } + onDataProgressiveRead: + function PDFDataRangeTransport_onDataProgress(chunk) { + this._readyCapability.promise.then(function () { + var listeners = this._progressiveReadListeners; + for (var i = 0, n = listeners.length; i < n; ++i) { + listeners[i](chunk); + } + }.bind(this)); + }, + + transportReady: function PDFDataRangeTransport_transportReady() { + this._readyCapability.resolve(); + }, + + requestDataRange: + function PDFDataRangeTransport_requestDataRange(begin, end) { + throw new Error('Abstract method PDFDataRangeTransport.requestDataRange'); + }, + + abort: function PDFDataRangeTransport_abort() { + } + }; + return PDFDataRangeTransport; +})(); + +PDFJS.PDFDataRangeTransport = PDFDataRangeTransport; + +/** + * Proxy to a PDFDocument in the worker thread. Also, contains commonly used + * properties that can be read synchronously. + * @class + * @alias PDFDocumentProxy + */ +var PDFDocumentProxy = (function PDFDocumentProxyClosure() { + function PDFDocumentProxy(pdfInfo, transport, loadingTask) { + this.pdfInfo = pdfInfo; + this.transport = transport; + this.loadingTask = loadingTask; + } + PDFDocumentProxy.prototype = /** @lends PDFDocumentProxy.prototype */ { + /** + * @return {number} Total number of pages the PDF contains. + */ + get numPages() { + return this.pdfInfo.numPages; + }, + /** + * @return {string} A unique ID to identify a PDF. Not guaranteed to be + * unique. + */ + get fingerprint() { + return this.pdfInfo.fingerprint; + }, + /** + * @param {number} pageNumber The page number to get. The first page is 1. + * @return {Promise} A promise that is resolved with a {@link PDFPageProxy} + * object. + */ + getPage: function PDFDocumentProxy_getPage(pageNumber) { + return this.transport.getPage(pageNumber); + }, + /** + * @param {{num: number, gen: number}} ref The page reference. Must have + * the 'num' and 'gen' properties. + * @return {Promise} A promise that is resolved with the page index that is + * associated with the reference. + */ + getPageIndex: function PDFDocumentProxy_getPageIndex(ref) { + return this.transport.getPageIndex(ref); + }, + /** + * @return {Promise} A promise that is resolved with a lookup table for + * mapping named destinations to reference numbers. + * + * This can be slow for large documents: use getDestination instead + */ + getDestinations: function PDFDocumentProxy_getDestinations() { + return this.transport.getDestinations(); + }, + /** + * @param {string} id The named destination to get. + * @return {Promise} A promise that is resolved with all information + * of the given named destination. + */ + getDestination: function PDFDocumentProxy_getDestination(id) { + return this.transport.getDestination(id); + }, + /** + * @return {Promise} A promise that is resolved with a lookup table for + * mapping named attachments to their content. + */ + getAttachments: function PDFDocumentProxy_getAttachments() { + return this.transport.getAttachments(); + }, + /** + * @return {Promise} A promise that is resolved with an array of all the + * JavaScript strings in the name tree. + */ + getJavaScript: function PDFDocumentProxy_getJavaScript() { + return this.transport.getJavaScript(); + }, + /** + * @return {Promise} A promise that is resolved with an {Array} that is a + * tree outline (if it has one) of the PDF. The tree is in the format of: + * [ + * { + * title: string, + * bold: boolean, + * italic: boolean, + * color: rgb array, + * dest: dest obj, + * items: array of more items like this + * }, + * ... + * ]. + */ + getOutline: function PDFDocumentProxy_getOutline() { + return this.transport.getOutline(); }, - - cancel: function InternalRenderTask_cancel() { - this.running = false; - this.cancelled = true; - this.callback('cancelled'); + /** + * @return {Promise} A promise that is resolved with an {Object} that has + * info and metadata properties. Info is an {Object} filled with anything + * available in the information dictionary and similarly metadata is a + * {Metadata} object with information from the metadata section of the PDF. + */ + getMetadata: function PDFDocumentProxy_getMetadata() { + return this.transport.getMetadata(); }, - - operatorListChanged: function InternalRenderTask_operatorListChanged() { - if (!this.graphicsReady) { - if (!this.graphicsReadyCallback) { - this.graphicsReadyCallback = this._continueBound; - } - return; - } - - if (this.stepper) { - this.stepper.updateOperatorList(this.operatorList); - } - - if (this.running) { - return; - } - this._continue(); + /** + * @return {Promise} A promise that is resolved with a TypedArray that has + * the raw data from the PDF. + */ + getData: function PDFDocumentProxy_getData() { + return this.transport.getData(); }, - - _continue: function InternalRenderTask__continue() { - this.running = true; - if (this.cancelled) { - return; - } - if (this.task.onContinue) { - this.task.onContinue.call(this.task, this._scheduleNextBound); - } else { - this._scheduleNext(); - } + /** + * @return {Promise} A promise that is resolved when the document's data + * is loaded. It is resolved with an {Object} that contains the length + * property that indicates size of the PDF data in bytes. + */ + getDownloadInfo: function PDFDocumentProxy_getDownloadInfo() { + return this.transport.downloadInfoCapability.promise; }, - - _scheduleNext: function InternalRenderTask__scheduleNext() { - if (this.useRequestAnimationFrame) { - window.requestAnimationFrame(this._nextBound); - } else { - Promise.resolve(undefined).then(this._nextBound); - } + /** + * @return {Promise} A promise this is resolved with current stats about + * document structures (see {@link PDFDocumentStats}). + */ + getStats: function PDFDocumentProxy_getStats() { + return this.transport.getStats(); }, - - _next: function InternalRenderTask__next() { - if (this.cancelled) { - return; - } - this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, - this.operatorListIdx, - this._continueBound, - this.stepper); - if (this.operatorListIdx === this.operatorList.argsArray.length) { - this.running = false; - if (this.operatorList.lastChunk) { - this.gfx.endDrawing(); - this.callback(); - } - } + /** + * Cleans up resources allocated by the document, e.g. created @font-face. + */ + cleanup: function PDFDocumentProxy_cleanup() { + this.transport.startCleanup(); + }, + /** + * Destroys current document instance and terminates worker. + */ + destroy: function PDFDocumentProxy_destroy() { + return this.loadingTask.destroy(); } - }; - - return InternalRenderTask; + return PDFDocumentProxy; })(); /** - * (Deprecated) Global observer of unsupported feature usages. Use - * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance. + * Page getTextContent parameters. + * + * @typedef {Object} getTextContentParameters + * @param {boolean} normalizeWhitespace - replaces all occurrences of + * whitespace with standard spaces (0x20). The default value is `false`. */ -PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() { - var listeners = []; - return { - listen: function (cb) { - deprecated('Global UnsupportedManager.listen is used: ' + - ' use PDFDocumentLoadingTask.onUnsupportedFeature instead'); - listeners.push(cb); - }, - notify: function (featureId) { - for (var i = 0, ii = listeners.length; i < ii; i++) { - listeners[i](featureId); - } - } - }; -})(); - -exports.getDocument = PDFJS.getDocument; -exports.PDFDataRangeTransport = PDFDataRangeTransport; -exports.PDFDocumentProxy = PDFDocumentProxy; -exports.PDFPageProxy = PDFPageProxy; -})); - - -(function (root, factory) { - { - factory((root.pdfjsDisplaySVG = {}), root.pdfjsSharedUtil); - } -}(this, function (exports, sharedUtil) { - -var FONT_IDENTITY_MATRIX = sharedUtil.FONT_IDENTITY_MATRIX; -var IDENTITY_MATRIX = sharedUtil.IDENTITY_MATRIX; -var ImageKind = sharedUtil.ImageKind; -var OPS = sharedUtil.OPS; -var Util = sharedUtil.Util; -var isNum = sharedUtil.isNum; -var isArray = sharedUtil.isArray; -var warn = sharedUtil.warn; - -var SVG_DEFAULTS = { - fontStyle: 'normal', - fontWeight: 'normal', - fillColor: '#000000' -}; - -var convertImgDataToPng = (function convertImgDataToPngClosure() { - var PNG_HEADER = - new Uint8Array([0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a]); - - var CHUNK_WRAPPER_SIZE = 12; - - var crcTable = new Int32Array(256); - for (var i = 0; i < 256; i++) { - var c = i; - for (var h = 0; h < 8; h++) { - if (c & 1) { - c = 0xedB88320 ^ ((c >> 1) & 0x7fffffff); - } else { - c = (c >> 1) & 0x7fffffff; - } - } - crcTable[i] = c; - } - - function crc32(data, start, end) { - var crc = -1; - for (var i = start; i < end; i++) { - var a = (crc ^ data[i]) & 0xff; - var b = crcTable[a]; - crc = (crc >>> 8) ^ b; - } - return crc ^ -1; - } - - function writePngChunk(type, body, data, offset) { - var p = offset; - var len = body.length; - - data[p] = len >> 24 & 0xff; - data[p + 1] = len >> 16 & 0xff; - data[p + 2] = len >> 8 & 0xff; - data[p + 3] = len & 0xff; - p += 4; - - data[p] = type.charCodeAt(0) & 0xff; - data[p + 1] = type.charCodeAt(1) & 0xff; - data[p + 2] = type.charCodeAt(2) & 0xff; - data[p + 3] = type.charCodeAt(3) & 0xff; - p += 4; - - data.set(body, p); - p += body.length; - - var crc = crc32(data, offset + 4, p); - - data[p] = crc >> 24 & 0xff; - data[p + 1] = crc >> 16 & 0xff; - data[p + 2] = crc >> 8 & 0xff; - data[p + 3] = crc & 0xff; - } - function adler32(data, start, end) { - var a = 1; - var b = 0; - for (var i = start; i < end; ++i) { - a = (a + (data[i] & 0xff)) % 65521; - b = (b + a) % 65521; - } - return (b << 16) | a; - } +/** + * Page text content. + * + * @typedef {Object} TextContent + * @property {array} items - array of {@link TextItem} + * @property {Object} styles - {@link TextStyles} objects, indexed by font + * name. + */ - function encode(imgData, kind) { - var width = imgData.width; - var height = imgData.height; - var bitDepth, colorType, lineSize; - var bytes = imgData.data; +/** + * Page text content part. + * + * @typedef {Object} TextItem + * @property {string} str - text content. + * @property {string} dir - text direction: 'ttb', 'ltr' or 'rtl'. + * @property {array} transform - transformation matrix. + * @property {number} width - width in device space. + * @property {number} height - height in device space. + * @property {string} fontName - font name used by pdf.js for converted font. + */ - switch (kind) { - case ImageKind.GRAYSCALE_1BPP: - colorType = 0; - bitDepth = 1; - lineSize = (width + 7) >> 3; - break; - case ImageKind.RGB_24BPP: - colorType = 2; - bitDepth = 8; - lineSize = width * 3; - break; - case ImageKind.RGBA_32BPP: - colorType = 6; - bitDepth = 8; - lineSize = width * 4; - break; - default: - throw new Error('invalid format'); - } +/** + * Text style. + * + * @typedef {Object} TextStyle + * @property {number} ascent - font ascent. + * @property {number} descent - font descent. + * @property {boolean} vertical - text is in vertical mode. + * @property {string} fontFamily - possible font family + */ - // prefix every row with predictor 0 - var literals = new Uint8Array((1 + lineSize) * height); - var offsetLiterals = 0, offsetBytes = 0; - var y, i; - for (y = 0; y < height; ++y) { - literals[offsetLiterals++] = 0; // no prediction - literals.set(bytes.subarray(offsetBytes, offsetBytes + lineSize), - offsetLiterals); - offsetBytes += lineSize; - offsetLiterals += lineSize; - } +/** + * Page annotation parameters. + * + * @typedef {Object} GetAnnotationsParameters + * @param {string} intent - Determines the annotations that will be fetched, + * can be either 'display' (viewable annotations) or 'print' + * (printable annotations). + * If the parameter is omitted, all annotations are fetched. + */ - if (kind === ImageKind.GRAYSCALE_1BPP) { - // inverting for B/W - offsetLiterals = 0; - for (y = 0; y < height; y++) { - offsetLiterals++; // skipping predictor - for (i = 0; i < lineSize; i++) { - literals[offsetLiterals++] ^= 0xFF; - } - } - } +/** + * Page render parameters. + * + * @typedef {Object} RenderParameters + * @property {Object} canvasContext - A 2D context of a DOM Canvas object. + * @property {PDFJS.PageViewport} viewport - Rendering viewport obtained by + * calling of PDFPage.getViewport method. + * @property {string} intent - Rendering intent, can be 'display' or 'print' + * (default value is 'display'). + * @property {Array} transform - (optional) Additional transform, applied + * just before viewport transform. + * @property {Object} imageLayer - (optional) An object that has beginLayout, + * endLayout and appendImage functions. + * @property {function} continueCallback - (deprecated) A function that will be + * called each time the rendering is paused. To continue + * rendering call the function that is the first argument + * to the callback. + */ - var ihdr = new Uint8Array([ - width >> 24 & 0xff, - width >> 16 & 0xff, - width >> 8 & 0xff, - width & 0xff, - height >> 24 & 0xff, - height >> 16 & 0xff, - height >> 8 & 0xff, - height & 0xff, - bitDepth, // bit depth - colorType, // color type - 0x00, // compression method - 0x00, // filter method - 0x00 // interlace method - ]); +/** + * PDF page operator list. + * + * @typedef {Object} PDFOperatorList + * @property {Array} fnArray - Array containing the operator functions. + * @property {Array} argsArray - Array containing the arguments of the + * functions. + */ - var len = literals.length; - var maxBlockLength = 0xFFFF; +/** + * Proxy to a PDFPage in the worker thread. + * @class + * @alias PDFPageProxy + */ +var PDFPageProxy = (function PDFPageProxyClosure() { + function PDFPageProxy(pageIndex, pageInfo, transport) { + this.pageIndex = pageIndex; + this.pageInfo = pageInfo; + this.transport = transport; + this.stats = new StatTimer(); + this.stats.enabled = !!globalScope.PDFJS.enableStats; + this.commonObjs = transport.commonObjs; + this.objs = new PDFObjects(); + this.cleanupAfterRender = false; + this.pendingCleanup = false; + this.intentStates = {}; + this.destroyed = false; + } + PDFPageProxy.prototype = /** @lends PDFPageProxy.prototype */ { + /** + * @return {number} Page number of the page. First page is 1. + */ + get pageNumber() { + return this.pageIndex + 1; + }, + /** + * @return {number} The number of degrees the page is rotated clockwise. + */ + get rotate() { + return this.pageInfo.rotate; + }, + /** + * @return {Object} The reference that points to this page. It has 'num' and + * 'gen' properties. + */ + get ref() { + return this.pageInfo.ref; + }, + /** + * @return {Array} An array of the visible portion of the PDF page in the + * user space units - [x1, y1, x2, y2]. + */ + get view() { + return this.pageInfo.view; + }, + /** + * @param {number} scale The desired scale of the viewport. + * @param {number} rotate Degrees to rotate the viewport. If omitted this + * defaults to the page rotation. + * @return {PDFJS.PageViewport} Contains 'width' and 'height' properties + * along with transforms required for rendering. + */ + getViewport: function PDFPageProxy_getViewport(scale, rotate) { + if (arguments.length < 2) { + rotate = this.rotate; + } + return new PDFJS.PageViewport(this.view, scale, rotate, 0, 0); + }, + /** + * @param {GetAnnotationsParameters} params - Annotation parameters. + * @return {Promise} A promise that is resolved with an {Array} of the + * annotation objects. + */ + getAnnotations: function PDFPageProxy_getAnnotations(params) { + var intent = (params && params.intent) || null; - var deflateBlocks = Math.ceil(len / maxBlockLength); - var idat = new Uint8Array(2 + len + deflateBlocks * 5 + 4); - var pi = 0; - idat[pi++] = 0x78; // compression method and flags - idat[pi++] = 0x9c; // flags + if (!this.annotationsPromise || this.annotationsIntent !== intent) { + this.annotationsPromise = this.transport.getAnnotations(this.pageIndex, + intent); + this.annotationsIntent = intent; + } + return this.annotationsPromise; + }, + /** + * Begins the process of rendering a page to the desired context. + * @param {RenderParameters} params Page render parameters. + * @return {RenderTask} An object that contains the promise, which + * is resolved when the page finishes rendering. + */ + render: function PDFPageProxy_render(params) { + var stats = this.stats; + stats.time('Overall'); - var pos = 0; - while (len > maxBlockLength) { - // writing non-final DEFLATE blocks type 0 and length of 65535 - idat[pi++] = 0x00; - idat[pi++] = 0xff; - idat[pi++] = 0xff; - idat[pi++] = 0x00; - idat[pi++] = 0x00; - idat.set(literals.subarray(pos, pos + maxBlockLength), pi); - pi += maxBlockLength; - pos += maxBlockLength; - len -= maxBlockLength; - } + // If there was a pending destroy cancel it so no cleanup happens during + // this call to render. + this.pendingCleanup = false; - // writing non-final DEFLATE blocks type 0 - idat[pi++] = 0x01; - idat[pi++] = len & 0xff; - idat[pi++] = len >> 8 & 0xff; - idat[pi++] = (~len & 0xffff) & 0xff; - idat[pi++] = (~len & 0xffff) >> 8 & 0xff; - idat.set(literals.subarray(pos), pi); - pi += literals.length - pos; + var renderingIntent = (params.intent === 'print' ? 'print' : 'display'); - var adler = adler32(literals, 0, literals.length); // checksum - idat[pi++] = adler >> 24 & 0xff; - idat[pi++] = adler >> 16 & 0xff; - idat[pi++] = adler >> 8 & 0xff; - idat[pi++] = adler & 0xff; + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; + } + var intentState = this.intentStates[renderingIntent]; - // PNG will consists: header, IHDR+data, IDAT+data, and IEND. - var pngLength = PNG_HEADER.length + (CHUNK_WRAPPER_SIZE * 3) + - ihdr.length + idat.length; - var data = new Uint8Array(pngLength); - var offset = 0; - data.set(PNG_HEADER, offset); - offset += PNG_HEADER.length; - writePngChunk('IHDR', ihdr, data, offset); - offset += CHUNK_WRAPPER_SIZE + ihdr.length; - writePngChunk('IDATA', idat, data, offset); - offset += CHUNK_WRAPPER_SIZE + idat.length; - writePngChunk('IEND', new Uint8Array(0), data, offset); + // If there's no displayReadyCapability yet, then the operatorList + // was never requested before. Make the request and create the promise. + if (!intentState.displayReadyCapability) { + intentState.receivingOperatorList = true; + intentState.displayReadyCapability = createPromiseCapability(); + intentState.operatorList = { + fnArray: [], + argsArray: [], + lastChunk: false + }; - return PDFJS.createObjectURL(data, 'image/png'); - } + this.stats.time('Page Request'); + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageNumber - 1, + intent: renderingIntent + }); + } - return function convertImgDataToPng(imgData) { - var kind = (imgData.kind === undefined ? - ImageKind.GRAYSCALE_1BPP : imgData.kind); - return encode(imgData, kind); - }; -})(); + var internalRenderTask = new InternalRenderTask(complete, params, + this.objs, + this.commonObjs, + intentState.operatorList, + this.pageNumber); + internalRenderTask.useRequestAnimationFrame = renderingIntent !== 'print'; + if (!intentState.renderTasks) { + intentState.renderTasks = []; + } + intentState.renderTasks.push(internalRenderTask); + var renderTask = internalRenderTask.task; -var SVGExtraState = (function SVGExtraStateClosure() { - function SVGExtraState() { - this.fontSizeScale = 1; - this.fontWeight = SVG_DEFAULTS.fontWeight; - this.fontSize = 0; + // Obsolete parameter support + if (params.continueCallback) { + deprecated('render is used with continueCallback parameter'); + renderTask.onContinue = params.continueCallback; + } - this.textMatrix = IDENTITY_MATRIX; - this.fontMatrix = FONT_IDENTITY_MATRIX; - this.leading = 0; + var self = this; + intentState.displayReadyCapability.promise.then( + function pageDisplayReadyPromise(transparency) { + if (self.pendingCleanup) { + complete(); + return; + } + stats.time('Rendering'); + internalRenderTask.initalizeGraphics(transparency); + internalRenderTask.operatorListChanged(); + }, + function pageDisplayReadPromiseError(reason) { + complete(reason); + } + ); - // Current point (in user coordinates) - this.x = 0; - this.y = 0; + function complete(error) { + var i = intentState.renderTasks.indexOf(internalRenderTask); + if (i >= 0) { + intentState.renderTasks.splice(i, 1); + } - // Start of text line (in text coordinates) - this.lineX = 0; - this.lineY = 0; + if (self.cleanupAfterRender) { + self.pendingCleanup = true; + } + self._tryCleanup(); - // Character and word spacing - this.charSpacing = 0; - this.wordSpacing = 0; - this.textHScale = 1; - this.textRise = 0; + if (error) { + internalRenderTask.capability.reject(error); + } else { + internalRenderTask.capability.resolve(); + } + stats.timeEnd('Rendering'); + stats.timeEnd('Overall'); + } - // Default foreground and background colors - this.fillColor = SVG_DEFAULTS.fillColor; - this.strokeColor = '#000000'; + return renderTask; + }, - this.fillAlpha = 1; - this.strokeAlpha = 1; - this.lineWidth = 1; - this.lineJoin = ''; - this.lineCap = ''; - this.miterLimit = 0; + /** + * @return {Promise} A promise resolved with an {@link PDFOperatorList} + * object that represents page's operator list. + */ + getOperatorList: function PDFPageProxy_getOperatorList() { + function operatorListChanged() { + if (intentState.operatorList.lastChunk) { + intentState.opListReadCapability.resolve(intentState.operatorList); + } + } - this.dashArray = []; - this.dashPhase = 0; + var renderingIntent = 'oplist'; + if (!this.intentStates[renderingIntent]) { + this.intentStates[renderingIntent] = {}; + } + var intentState = this.intentStates[renderingIntent]; - this.dependencies = []; + if (!intentState.opListReadCapability) { + var opListTask = {}; + opListTask.operatorListChanged = operatorListChanged; + intentState.receivingOperatorList = true; + intentState.opListReadCapability = createPromiseCapability(); + intentState.renderTasks = []; + intentState.renderTasks.push(opListTask); + intentState.operatorList = { + fnArray: [], + argsArray: [], + lastChunk: false + }; - // Clipping - this.clipId = ''; - this.pendingClip = false; + this.transport.messageHandler.send('RenderPageRequest', { + pageIndex: this.pageIndex, + intent: renderingIntent + }); + } + return intentState.opListReadCapability.promise; + }, - this.maskId = ''; - } + /** + * @param {getTextContentParameters} params - getTextContent parameters. + * @return {Promise} That is resolved a {@link TextContent} + * object that represent the page text content. + */ + getTextContent: function PDFPageProxy_getTextContent(params) { + var normalizeWhitespace = (params && params.normalizeWhitespace) || false; - SVGExtraState.prototype = { - clone: function SVGExtraState_clone() { - return Object.create(this); + return this.transport.messageHandler.sendWithPromise('GetTextContent', { + pageIndex: this.pageNumber - 1, + normalizeWhitespace: normalizeWhitespace, + }); }, - setCurrentPoint: function SVGExtraState_setCurrentPoint(x, y) { - this.x = x; - this.y = y; - } - }; - return SVGExtraState; -})(); -var SVGGraphics = (function SVGGraphicsClosure() { - function createScratchSVG(width, height) { - var NS = 'http://www.w3.org/2000/svg'; - var svg = document.createElementNS(NS, 'svg:svg'); - svg.setAttributeNS(null, 'version', '1.1'); - svg.setAttributeNS(null, 'width', width + 'px'); - svg.setAttributeNS(null, 'height', height + 'px'); - svg.setAttributeNS(null, 'viewBox', '0 0 ' + width + ' ' + height); - return svg; - } + /** + * Destroys page object. + */ + _destroy: function PDFPageProxy_destroy() { + this.destroyed = true; + this.transport.pageCache[this.pageIndex] = null; - function opListToTree(opList) { - var opTree = []; - var tmp = []; - var opListLen = opList.length; + var waitOn = []; + Object.keys(this.intentStates).forEach(function(intent) { + var intentState = this.intentStates[intent]; + intentState.renderTasks.forEach(function(renderTask) { + var renderCompleted = renderTask.capability.promise. + catch(function () {}); // ignoring failures + waitOn.push(renderCompleted); + renderTask.cancel(); + }); + }, this); + this.objs.clear(); + this.annotationsPromise = null; + this.pendingCleanup = false; + return Promise.all(waitOn); + }, - for (var x = 0; x < opListLen; x++) { - if (opList[x].fn === 'save') { - opTree.push({'fnId': 92, 'fn': 'group', 'items': []}); - tmp.push(opTree); - opTree = opTree[opTree.length - 1].items; - continue; - } + /** + * Cleans up resources allocated by the page. (deprecated) + */ + destroy: function() { + deprecated('page destroy method, use cleanup() instead'); + this.cleanup(); + }, - if(opList[x].fn === 'restore') { - opTree = tmp.pop(); - } else { - opTree.push(opList[x]); + /** + * Cleans up resources allocated by the page. + */ + cleanup: function PDFPageProxy_cleanup() { + this.pendingCleanup = true; + this._tryCleanup(); + }, + /** + * For internal use only. Attempts to clean up if rendering is in a state + * where that's possible. + * @ignore + */ + _tryCleanup: function PDFPageProxy_tryCleanup() { + if (!this.pendingCleanup || + Object.keys(this.intentStates).some(function(intent) { + var intentState = this.intentStates[intent]; + return (intentState.renderTasks.length !== 0 || + intentState.receivingOperatorList); + }, this)) { + return; } - } - return opTree; - } - - /** - * Formats float number. - * @param value {number} number to format. - * @returns {string} - */ - function pf(value) { - if (value === (value | 0)) { // integer number - return value.toString(); - } - var s = value.toFixed(10); - var i = s.length - 1; - if (s[i] !== '0') { - return s; - } - // removing trailing zeros - do { - i--; - } while (s[i] === '0'); - return s.substr(0, s[i] === '.' ? i : i + 1); - } - /** - * Formats transform matrix. The standard rotation, scale and translate - * matrices are replaced by their shorter forms, and for identity matrix - * returns empty string to save the memory. - * @param m {Array} matrix to format. - * @returns {string} - */ - function pm(m) { - if (m[4] === 0 && m[5] === 0) { - if (m[1] === 0 && m[2] === 0) { - if (m[0] === 1 && m[3] === 1) { - return ''; - } - return 'scale(' + pf(m[0]) + ' ' + pf(m[3]) + ')'; + Object.keys(this.intentStates).forEach(function(intent) { + delete this.intentStates[intent]; + }, this); + this.objs.clear(); + this.annotationsPromise = null; + this.pendingCleanup = false; + }, + /** + * For internal use only. + * @ignore + */ + _startRenderPage: function PDFPageProxy_startRenderPage(transparency, + intent) { + var intentState = this.intentStates[intent]; + // TODO Refactor RenderPageRequest to separate rendering + // and operator list logic + if (intentState.displayReadyCapability) { + intentState.displayReadyCapability.resolve(transparency); + } + }, + /** + * For internal use only. + * @ignore + */ + _renderPageChunk: function PDFPageProxy_renderPageChunk(operatorListChunk, + intent) { + var intentState = this.intentStates[intent]; + var i, ii; + // Add the new chunk to the current operator list. + for (i = 0, ii = operatorListChunk.length; i < ii; i++) { + intentState.operatorList.fnArray.push(operatorListChunk.fnArray[i]); + intentState.operatorList.argsArray.push( + operatorListChunk.argsArray[i]); } - if (m[0] === m[3] && m[1] === -m[2]) { - var a = Math.acos(m[0]) * 180 / Math.PI; - return 'rotate(' + pf(a) + ')'; + intentState.operatorList.lastChunk = operatorListChunk.lastChunk; + + // Notify all the rendering tasks there are more operators to be consumed. + for (i = 0; i < intentState.renderTasks.length; i++) { + intentState.renderTasks[i].operatorListChanged(); } - } else { - if (m[0] === 1 && m[1] === 0 && m[2] === 0 && m[3] === 1) { - return 'translate(' + pf(m[4]) + ' ' + pf(m[5]) + ')'; + + if (operatorListChunk.lastChunk) { + intentState.receivingOperatorList = false; + this._tryCleanup(); } } - return 'matrix(' + pf(m[0]) + ' ' + pf(m[1]) + ' ' + pf(m[2]) + ' ' + - pf(m[3]) + ' ' + pf(m[4]) + ' ' + pf(m[5]) + ')'; - } + }; + return PDFPageProxy; +})(); - function SVGGraphics(commonObjs, objs) { - this.current = new SVGExtraState(); - this.transformMatrix = IDENTITY_MATRIX; // Graphics state matrix - this.transformStack = []; - this.extraStack = []; - this.commonObjs = commonObjs; - this.objs = objs; - this.pendingEOFill = false; +/** + * PDF.js web worker abstraction, it controls instantiation of PDF documents and + * WorkerTransport for them. If creation of a web worker is not possible, + * a "fake" worker will be used instead. + * @class + */ +var PDFWorker = (function PDFWorkerClosure() { + var nextFakeWorkerId = 0; - this.embedFonts = false; - this.embeddedFonts = {}; - this.cssStyle = null; + // Loads worker code into main thread. + function setupFakeWorkerGlobal() { + if (!PDFJS.fakeWorkerFilesLoadedCapability) { + PDFJS.fakeWorkerFilesLoadedCapability = createPromiseCapability(); + // In the developer build load worker_loader which in turn loads all the + // other files and resolves the promise. In production only the + // pdf.worker.js file is needed. + var loader = fakeWorkerFilesLoader || function (callback) { + Util.loadScript(PDFJS.workerSrc, callback); + }; + loader(function () { + PDFJS.fakeWorkerFilesLoadedCapability.resolve(); + }); + } + return PDFJS.fakeWorkerFilesLoadedCapability.promise; } - var NS = 'http://www.w3.org/2000/svg'; - var XML_NS = 'http://www.w3.org/XML/1998/namespace'; - var XLINK_NS = 'http://www.w3.org/1999/xlink'; - var LINE_CAP_STYLES = ['butt', 'round', 'square']; - var LINE_JOIN_STYLES = ['miter', 'round', 'bevel']; - var clipCount = 0; - var maskCount = 0; + function PDFWorker(name) { + this.name = name; + this.destroyed = false; - SVGGraphics.prototype = { - save: function SVGGraphics_save() { - this.transformStack.push(this.transformMatrix); - var old = this.current; - this.extraStack.push(old); - this.current = old.clone(); - }, + this._readyCapability = createPromiseCapability(); + this._port = null; + this._webWorker = null; + this._messageHandler = null; + this._initialize(); + } - restore: function SVGGraphics_restore() { - this.transformMatrix = this.transformStack.pop(); - this.current = this.extraStack.pop(); + PDFWorker.prototype = /** @lends PDFWorker.prototype */ { + get promise() { + return this._readyCapability.promise; + }, - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.pgrp.appendChild(this.tgrp); + get port() { + return this._port; }, - group: function SVGGraphics_group(items) { - this.save(); - this.executeOpTree(items); - this.restore(); + get messageHandler() { + return this._messageHandler; }, - loadDependencies: function SVGGraphics_loadDependencies(operatorList) { - var fnArray = operatorList.fnArray; - var fnArrayLen = fnArray.length; - var argsArray = operatorList.argsArray; + _initialize: function PDFWorker_initialize() { + // If worker support isn't disabled explicit and the browser has worker + // support, create a new web worker and test if it/the browser fullfills + // all requirements to run parts of pdf.js in a web worker. + // Right now, the requirement is, that an Uint8Array is still an + // Uint8Array as it arrives on the worker. (Chrome added this with v.15.) + if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') { + var workerSrc = PDFJS.workerSrc; + if (!workerSrc) { + error('No PDFJS.workerSrc specified'); + } - var self = this; - for (var i = 0; i < fnArrayLen; i++) { - if (OPS.dependency === fnArray[i]) { - var deps = argsArray[i]; - for (var n = 0, nn = deps.length; n < nn; n++) { - var obj = deps[n]; - var common = obj.substring(0, 2) === 'g_'; - var promise; - if (common) { - promise = new Promise(function(resolve) { - self.commonObjs.get(obj, resolve); - }); + try { + // Some versions of FF can't create a worker on localhost, see: + // https://bugzilla.mozilla.org/show_bug.cgi?id=683280 + var worker = new Worker(workerSrc); + var messageHandler = new MessageHandler('main', 'worker', worker); + messageHandler.on('test', function PDFWorker_test(data) { + if (this.destroyed) { + this._readyCapability.reject(new Error('Worker was destroyed')); + messageHandler.destroy(); + worker.terminate(); + return; // worker was destroyed + } + var supportTypedArray = data && data.supportTypedArray; + if (supportTypedArray) { + this._messageHandler = messageHandler; + this._port = worker; + this._webWorker = worker; + if (!data.supportTransfers) { + PDFJS.postMessageTransfers = false; + } + this._readyCapability.resolve(); } else { - promise = new Promise(function(resolve) { - self.objs.get(obj, resolve); - }); + this._setupFakeWorker(); + messageHandler.destroy(); + worker.terminate(); } - this.current.dependencies.push(promise); - } + }.bind(this)); + + messageHandler.on('console_log', function (data) { + console.log.apply(console, data); + }); + messageHandler.on('console_error', function (data) { + console.error.apply(console, data); + }); + + messageHandler.on('ready', function (data) { + if (this.destroyed) { + this._readyCapability.reject(new Error('Worker was destroyed')); + messageHandler.destroy(); + worker.terminate(); + return; // worker was destroyed + } + try { + sendTest(); + } catch (e) { + // We need fallback to a faked worker. + this._setupFakeWorker(); + } + }.bind(this)); + + var sendTest = function () { + var testObj = new Uint8Array( + [PDFJS.postMessageTransfers ? 255 : 0]); + // Some versions of Opera throw a DATA_CLONE_ERR on serializing the + // typed array. Also, checking if we can use transfers. + try { + messageHandler.send('test', testObj, [testObj.buffer]); + } catch (ex) { + info('Cannot use postMessage transfers'); + testObj[0] = 0; + messageHandler.send('test', testObj); + } + }; + + // It might take time for worker to initialize (especially when AMD + // loader is used). We will try to send test immediately, and then + // when 'ready' message will arrive. The worker shall process only + // first received 'test'. + sendTest(); + return; + } catch (e) { + info('The worker has been disabled.'); } } - return Promise.all(this.current.dependencies); + // Either workers are disabled, not supported or have thrown an exception. + // Thus, we fallback to a faked worker. + this._setupFakeWorker(); + }, + + _setupFakeWorker: function PDFWorker_setupFakeWorker() { + if (!globalScope.PDFJS.disableWorker) { + warn('Setting up fake worker.'); + globalScope.PDFJS.disableWorker = true; + } + + setupFakeWorkerGlobal().then(function () { + if (this.destroyed) { + this._readyCapability.reject(new Error('Worker was destroyed')); + return; + } + + // If we don't use a worker, just post/sendMessage to the main thread. + var port = { + _listeners: [], + postMessage: function (obj) { + var e = {data: obj}; + this._listeners.forEach(function (listener) { + listener.call(this, e); + }, this); + }, + addEventListener: function (name, listener) { + this._listeners.push(listener); + }, + removeEventListener: function (name, listener) { + var i = this._listeners.indexOf(listener); + this._listeners.splice(i, 1); + }, + terminate: function () {} + }; + this._port = port; + + // All fake workers use the same port, making id unique. + var id = 'fake' + (nextFakeWorkerId++); + + // If the main thread is our worker, setup the handling for the + // messages -- the main thread sends to it self. + var workerHandler = new MessageHandler(id + '_worker', id, port); + PDFJS.WorkerMessageHandler.setup(workerHandler, port); + + var messageHandler = new MessageHandler(id, id + '_worker', port); + this._messageHandler = messageHandler; + this._readyCapability.resolve(); + }.bind(this)); }, - transform: function SVGGraphics_transform(a, b, c, d, e, f) { - var transformMatrix = [a, b, c, d, e, f]; - this.transformMatrix = PDFJS.Util.transform(this.transformMatrix, - transformMatrix); + /** + * Destroys the worker instance. + */ + destroy: function PDFWorker_destroy() { + this.destroyed = true; + if (this._webWorker) { + // We need to terminate only web worker created resource. + this._webWorker.terminate(); + this._webWorker = null; + } + this._port = null; + if (this._messageHandler) { + this._messageHandler.destroy(); + this._messageHandler = null; + } + } + }; + + return PDFWorker; +})(); +PDFJS.PDFWorker = PDFWorker; - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - }, +/** + * For internal use only. + * @ignore + */ +var WorkerTransport = (function WorkerTransportClosure() { + function WorkerTransport(messageHandler, loadingTask, pdfDataRangeTransport) { + this.messageHandler = messageHandler; + this.loadingTask = loadingTask; + this.pdfDataRangeTransport = pdfDataRangeTransport; + this.commonObjs = new PDFObjects(); + this.fontLoader = new FontLoader(loadingTask.docId); - getSVG: function SVGGraphics_getSVG(operatorList, viewport) { - this.svg = createScratchSVG(viewport.width, viewport.height); - this.viewport = viewport; + this.destroyed = false; + this.destroyCapability = null; - return this.loadDependencies(operatorList).then(function () { - this.transformMatrix = IDENTITY_MATRIX; - this.pgrp = document.createElementNS(NS, 'svg:g'); // Parent group - this.pgrp.setAttributeNS(null, 'transform', pm(viewport.transform)); - this.tgrp = document.createElementNS(NS, 'svg:g'); // Transform group - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.defs = document.createElementNS(NS, 'svg:defs'); - this.pgrp.appendChild(this.defs); - this.pgrp.appendChild(this.tgrp); - this.svg.appendChild(this.pgrp); - var opTree = this.convertOpList(operatorList); - this.executeOpTree(opTree); - return this.svg; - }.bind(this)); + this.pageCache = []; + this.pagePromises = []; + this.downloadInfoCapability = createPromiseCapability(); + + this.setupMessageHandler(); + } + WorkerTransport.prototype = { + destroy: function WorkerTransport_destroy() { + if (this.destroyCapability) { + return this.destroyCapability.promise; + } + + this.destroyed = true; + this.destroyCapability = createPromiseCapability(); + + var waitOn = []; + // We need to wait for all renderings to be completed, e.g. + // timeout/rAF can take a long time. + this.pageCache.forEach(function (page) { + if (page) { + waitOn.push(page._destroy()); + } + }); + this.pageCache = []; + this.pagePromises = []; + var self = this; + // We also need to wait for the worker to finish its long running tasks. + var terminated = this.messageHandler.sendWithPromise('Terminate', null); + waitOn.push(terminated); + Promise.all(waitOn).then(function () { + self.fontLoader.clear(); + if (self.pdfDataRangeTransport) { + self.pdfDataRangeTransport.abort(); + self.pdfDataRangeTransport = null; + } + if (self.messageHandler) { + self.messageHandler.destroy(); + self.messageHandler = null; + } + self.destroyCapability.resolve(); + }, this.destroyCapability.reject); + return this.destroyCapability.promise; }, - convertOpList: function SVGGraphics_convertOpList(operatorList) { - var argsArray = operatorList.argsArray; - var fnArray = operatorList.fnArray; - var fnArrayLen = fnArray.length; - var REVOPS = []; - var opList = []; + setupMessageHandler: + function WorkerTransport_setupMessageHandler() { + var messageHandler = this.messageHandler; - for (var op in OPS) { - REVOPS[OPS[op]] = op; + function updatePassword(password) { + messageHandler.send('UpdatePassword', password); } - for (var x = 0; x < fnArrayLen; x++) { - var fnId = fnArray[x]; - opList.push({'fnId' : fnId, 'fn': REVOPS[fnId], 'args': argsArray[x]}); - } - return opListToTree(opList); - }, + var pdfDataRangeTransport = this.pdfDataRangeTransport; + if (pdfDataRangeTransport) { + pdfDataRangeTransport.addRangeListener(function(begin, chunk) { + messageHandler.send('OnDataRange', { + begin: begin, + chunk: chunk + }); + }); - executeOpTree: function SVGGraphics_executeOpTree(opTree) { - var opTreeLen = opTree.length; - for(var x = 0; x < opTreeLen; x++) { - var fn = opTree[x].fn; - var fnId = opTree[x].fnId; - var args = opTree[x].args; + pdfDataRangeTransport.addProgressListener(function(loaded) { + messageHandler.send('OnDataProgress', { + loaded: loaded + }); + }); - switch (fnId | 0) { - case OPS.beginText: - this.beginText(); - break; - case OPS.setLeading: - this.setLeading(args); - break; - case OPS.setLeadingMoveText: - this.setLeadingMoveText(args[0], args[1]); - break; - case OPS.setFont: - this.setFont(args); - break; - case OPS.showText: - this.showText(args[0]); - break; - case OPS.showSpacedText: - this.showText(args[0]); - break; - case OPS.endText: - this.endText(); - break; - case OPS.moveText: - this.moveText(args[0], args[1]); - break; - case OPS.setCharSpacing: - this.setCharSpacing(args[0]); - break; - case OPS.setWordSpacing: - this.setWordSpacing(args[0]); - break; - case OPS.setHScale: - this.setHScale(args[0]); - break; - case OPS.setTextMatrix: - this.setTextMatrix(args[0], args[1], args[2], - args[3], args[4], args[5]); - break; - case OPS.setLineWidth: - this.setLineWidth(args[0]); - break; - case OPS.setLineJoin: - this.setLineJoin(args[0]); - break; - case OPS.setLineCap: - this.setLineCap(args[0]); - break; - case OPS.setMiterLimit: - this.setMiterLimit(args[0]); - break; - case OPS.setFillRGBColor: - this.setFillRGBColor(args[0], args[1], args[2]); - break; - case OPS.setStrokeRGBColor: - this.setStrokeRGBColor(args[0], args[1], args[2]); - break; - case OPS.setDash: - this.setDash(args[0], args[1]); - break; - case OPS.setGState: - this.setGState(args[0]); - break; - case OPS.fill: - this.fill(); - break; - case OPS.eoFill: - this.eoFill(); - break; - case OPS.stroke: - this.stroke(); - break; - case OPS.fillStroke: - this.fillStroke(); - break; - case OPS.eoFillStroke: - this.eoFillStroke(); - break; - case OPS.clip: - this.clip('nonzero'); - break; - case OPS.eoClip: - this.clip('evenodd'); - break; - case OPS.paintSolidColorImageMask: - this.paintSolidColorImageMask(); - break; - case OPS.paintJpegXObject: - this.paintJpegXObject(args[0], args[1], args[2]); - break; - case OPS.paintImageXObject: - this.paintImageXObject(args[0]); - break; - case OPS.paintInlineImageXObject: - this.paintInlineImageXObject(args[0]); - break; - case OPS.paintImageMaskXObject: - this.paintImageMaskXObject(args[0]); - break; - case OPS.paintFormXObjectBegin: - this.paintFormXObjectBegin(args[0], args[1]); - break; - case OPS.paintFormXObjectEnd: - this.paintFormXObjectEnd(); - break; - case OPS.closePath: - this.closePath(); - break; - case OPS.closeStroke: - this.closeStroke(); - break; - case OPS.closeFillStroke: - this.closeFillStroke(); - break; - case OPS.nextLine: - this.nextLine(); - break; - case OPS.transform: - this.transform(args[0], args[1], args[2], args[3], - args[4], args[5]); - break; - case OPS.constructPath: - this.constructPath(args[0], args[1]); - break; - case OPS.endPath: - this.endPath(); - break; - case 92: - this.group(opTree[x].items); - break; - default: - warn('Unimplemented method '+ fn); - break; - } + pdfDataRangeTransport.addProgressiveReadListener(function(chunk) { + messageHandler.send('OnDataRange', { + chunk: chunk + }); + }); + + messageHandler.on('RequestDataRange', + function transportDataRange(data) { + pdfDataRangeTransport.requestDataRange(data.begin, data.end); + }, this); } - }, - setWordSpacing: function SVGGraphics_setWordSpacing(wordSpacing) { - this.current.wordSpacing = wordSpacing; - }, + messageHandler.on('GetDoc', function transportDoc(data) { + var pdfInfo = data.pdfInfo; + this.numPages = data.pdfInfo.numPages; + var loadingTask = this.loadingTask; + var pdfDocument = new PDFDocumentProxy(pdfInfo, this, loadingTask); + this.pdfDocument = pdfDocument; + loadingTask._capability.resolve(pdfDocument); + }, this); - setCharSpacing: function SVGGraphics_setCharSpacing(charSpacing) { - this.current.charSpacing = charSpacing; - }, + messageHandler.on('NeedPassword', + function transportNeedPassword(exception) { + var loadingTask = this.loadingTask; + if (loadingTask.onPassword) { + return loadingTask.onPassword(updatePassword, + PasswordResponses.NEED_PASSWORD); + } + loadingTask._capability.reject( + new PasswordException(exception.message, exception.code)); + }, this); - nextLine: function SVGGraphics_nextLine() { - this.moveText(0, this.current.leading); - }, + messageHandler.on('IncorrectPassword', + function transportIncorrectPassword(exception) { + var loadingTask = this.loadingTask; + if (loadingTask.onPassword) { + return loadingTask.onPassword(updatePassword, + PasswordResponses.INCORRECT_PASSWORD); + } + loadingTask._capability.reject( + new PasswordException(exception.message, exception.code)); + }, this); - setTextMatrix: function SVGGraphics_setTextMatrix(a, b, c, d, e, f) { - var current = this.current; - this.current.textMatrix = this.current.lineMatrix = [a, b, c, d, e, f]; + messageHandler.on('InvalidPDF', function transportInvalidPDF(exception) { + this.loadingTask._capability.reject( + new InvalidPDFException(exception.message)); + }, this); - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; + messageHandler.on('MissingPDF', function transportMissingPDF(exception) { + this.loadingTask._capability.reject( + new MissingPDFException(exception.message)); + }, this); - current.xcoords = []; - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); + messageHandler.on('UnexpectedResponse', + function transportUnexpectedResponse(exception) { + this.loadingTask._capability.reject( + new UnexpectedResponseException(exception.message, exception.status)); + }, this); - current.txtElement = document.createElementNS(NS, 'svg:text'); - current.txtElement.appendChild(current.tspan); - }, + messageHandler.on('UnknownError', + function transportUnknownError(exception) { + this.loadingTask._capability.reject( + new UnknownErrorException(exception.message, exception.details)); + }, this); - beginText: function SVGGraphics_beginText() { - this.current.x = this.current.lineX = 0; - this.current.y = this.current.lineY = 0; - this.current.textMatrix = IDENTITY_MATRIX; - this.current.lineMatrix = IDENTITY_MATRIX; - this.current.tspan = document.createElementNS(NS, 'svg:tspan'); - this.current.txtElement = document.createElementNS(NS, 'svg:text'); - this.current.txtgrp = document.createElementNS(NS, 'svg:g'); - this.current.xcoords = []; - }, + messageHandler.on('DataLoaded', function transportPage(data) { + this.downloadInfoCapability.resolve(data); + }, this); - moveText: function SVGGraphics_moveText(x, y) { - var current = this.current; - this.current.x = this.current.lineX += x; - this.current.y = this.current.lineY += y; + messageHandler.on('PDFManagerReady', function transportPage(data) { + if (this.pdfDataRangeTransport) { + this.pdfDataRangeTransport.transportReady(); + } + }, this); - current.xcoords = []; - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - }, + messageHandler.on('StartRenderPage', function transportRender(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } + var page = this.pageCache[data.pageIndex]; - showText: function SVGGraphics_showText(glyphs) { - var current = this.current; - var font = current.font; - var fontSize = current.fontSize; + page.stats.timeEnd('Page Request'); + page._startRenderPage(data.transparency, data.intent); + }, this); - if (fontSize === 0) { - return; - } + messageHandler.on('RenderPageChunk', function transportRender(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } + var page = this.pageCache[data.pageIndex]; - var charSpacing = current.charSpacing; - var wordSpacing = current.wordSpacing; - var fontDirection = current.fontDirection; - var textHScale = current.textHScale * fontDirection; - var glyphsLength = glyphs.length; - var vertical = font.vertical; - var widthAdvanceScale = fontSize * current.fontMatrix[0]; + page._renderPageChunk(data.operatorList, data.intent); + }, this); - var x = 0, i; - for (i = 0; i < glyphsLength; ++i) { - var glyph = glyphs[i]; - if (glyph === null) { - // word break - x += fontDirection * wordSpacing; - continue; - } else if (isNum(glyph)) { - x += -glyph * fontSize * 0.001; - continue; + messageHandler.on('commonobj', function transportObj(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. } - current.xcoords.push(current.x + x * textHScale); - var width = glyph.width; - var character = glyph.fontChar; - var charWidth = width * widthAdvanceScale + charSpacing * fontDirection; - x += charWidth; + var id = data[0]; + var type = data[1]; + if (this.commonObjs.hasData(id)) { + return; + } - current.tspan.textContent += character; - } - if (vertical) { - current.y -= x * textHScale; - } else { - current.x += x * textHScale; - } + switch (type) { + case 'Font': + var exportedData = data[2]; - current.tspan.setAttributeNS(null, 'x', - current.xcoords.map(pf).join(' ')); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - current.tspan.setAttributeNS(null, 'font-family', current.fontFamily); - current.tspan.setAttributeNS(null, 'font-size', - pf(current.fontSize) + 'px'); - if (current.fontStyle !== SVG_DEFAULTS.fontStyle) { - current.tspan.setAttributeNS(null, 'font-style', current.fontStyle); - } - if (current.fontWeight !== SVG_DEFAULTS.fontWeight) { - current.tspan.setAttributeNS(null, 'font-weight', current.fontWeight); - } - if (current.fillColor !== SVG_DEFAULTS.fillColor) { - current.tspan.setAttributeNS(null, 'fill', current.fillColor); - } + var font; + if ('error' in exportedData) { + var error = exportedData.error; + warn('Error during font loading: ' + error); + this.commonObjs.resolve(id, error); + break; + } else { + font = new FontFaceObject(exportedData); + } + + this.fontLoader.bind( + [font], + function fontReady(fontObjs) { + this.commonObjs.resolve(id, font); + }.bind(this) + ); + break; + case 'FontPath': + this.commonObjs.resolve(id, data[2]); + break; + default: + error('Got unknown common object type ' + type); + } + }, this); + + messageHandler.on('obj', function transportObj(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } + + var id = data[0]; + var pageIndex = data[1]; + var type = data[2]; + var pageProxy = this.pageCache[pageIndex]; + var imageData; + if (pageProxy.objs.hasData(id)) { + return; + } + + switch (type) { + case 'JpegStream': + imageData = data[3]; + loadJpegStream(id, imageData, pageProxy.objs); + break; + case 'Image': + imageData = data[3]; + pageProxy.objs.resolve(id, imageData); + + // heuristics that will allow not to store large data + var MAX_IMAGE_SIZE_TO_STORE = 8000000; + if (imageData && 'data' in imageData && + imageData.data.length > MAX_IMAGE_SIZE_TO_STORE) { + pageProxy.cleanupAfterRender = true; + } + break; + default: + error('Got unknown object type ' + type); + } + }, this); + + messageHandler.on('DocProgress', function transportDocProgress(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } + + var loadingTask = this.loadingTask; + if (loadingTask.onProgress) { + loadingTask.onProgress({ + loaded: data.loaded, + total: data.total + }); + } + }, this); - current.txtElement.setAttributeNS(null, 'transform', - pm(current.textMatrix) + - ' scale(1, -1)' ); - current.txtElement.setAttributeNS(XML_NS, 'xml:space', 'preserve'); - current.txtElement.appendChild(current.tspan); - current.txtgrp.appendChild(current.txtElement); + messageHandler.on('PageError', function transportError(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } - this.tgrp.appendChild(current.txtElement); + var page = this.pageCache[data.pageNum - 1]; + var intentState = page.intentStates[data.intent]; + if (intentState.displayReadyCapability) { + intentState.displayReadyCapability.reject(data.error); + } else { + error(data.error); + } + }, this); - }, + messageHandler.on('UnsupportedFeature', + function transportUnsupportedFeature(data) { + if (this.destroyed) { + return; // Ignore any pending requests if the worker was terminated. + } + var featureId = data.featureId; + var loadingTask = this.loadingTask; + if (loadingTask.onUnsupportedFeature) { + loadingTask.onUnsupportedFeature(featureId); + } + PDFJS.UnsupportedManager.notify(featureId); + }, this); - setLeadingMoveText: function SVGGraphics_setLeadingMoveText(x, y) { - this.setLeading(-y); - this.moveText(x, y); - }, + messageHandler.on('JpegDecode', function(data) { + if (this.destroyed) { + return Promise.reject('Worker was terminated'); + } - addFontStyle: function SVGGraphics_addFontStyle(fontObj) { - if (!this.cssStyle) { - this.cssStyle = document.createElementNS(NS, 'svg:style'); - this.cssStyle.setAttributeNS(null, 'type', 'text/css'); - this.defs.appendChild(this.cssStyle); - } + var imageUrl = data[0]; + var components = data[1]; + if (components !== 3 && components !== 1) { + return Promise.reject( + new Error('Only 3 components or 1 component can be returned')); + } - var url = PDFJS.createObjectURL(fontObj.data, fontObj.mimetype); - this.cssStyle.textContent += - '@font-face { font-family: "' + fontObj.loadedName + '";' + - ' src: url(' + url + '); }\n'; + return new Promise(function (resolve, reject) { + var img = new Image(); + img.onload = function () { + var width = img.width; + var height = img.height; + var size = width * height; + var rgbaLength = size * 4; + var buf = new Uint8Array(size * components); + var tmpCanvas = createScratchCanvas(width, height); + var tmpCtx = tmpCanvas.getContext('2d'); + tmpCtx.drawImage(img, 0, 0); + var data = tmpCtx.getImageData(0, 0, width, height).data; + var i, j; + + if (components === 3) { + for (i = 0, j = 0; i < rgbaLength; i += 4, j += 3) { + buf[j] = data[i]; + buf[j + 1] = data[i + 1]; + buf[j + 2] = data[i + 2]; + } + } else if (components === 1) { + for (i = 0, j = 0; i < rgbaLength; i += 4, j++) { + buf[j] = data[i]; + } + } + resolve({ data: buf, width: width, height: height}); + }; + img.onerror = function () { + reject(new Error('JpegDecode failed to load image')); + }; + img.src = imageUrl; + }); + }, this); }, - setFont: function SVGGraphics_setFont(details) { - var current = this.current; - var fontObj = this.commonObjs.get(details[0]); - var size = details[1]; - this.current.font = fontObj; + getData: function WorkerTransport_getData() { + return this.messageHandler.sendWithPromise('GetData', null); + }, - if (this.embedFonts && fontObj.data && - !this.embeddedFonts[fontObj.loadedName]) { - this.addFontStyle(fontObj); - this.embeddedFonts[fontObj.loadedName] = fontObj; + getPage: function WorkerTransport_getPage(pageNumber, capability) { + if (pageNumber <= 0 || pageNumber > this.numPages || + (pageNumber|0) !== pageNumber) { + return Promise.reject(new Error('Invalid page request')); } - current.fontMatrix = (fontObj.fontMatrix ? - fontObj.fontMatrix : FONT_IDENTITY_MATRIX); - - var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') : - (fontObj.bold ? 'bold' : 'normal'); - var italic = fontObj.italic ? 'italic' : 'normal'; - - if (size < 0) { - size = -size; - current.fontDirection = -1; - } else { - current.fontDirection = 1; + var pageIndex = pageNumber - 1; + if (pageIndex in this.pagePromises) { + return this.pagePromises[pageIndex]; } - current.fontSize = size; - current.fontFamily = fontObj.loadedName; - current.fontWeight = bold; - current.fontStyle = italic; - - current.tspan = document.createElementNS(NS, 'svg:tspan'); - current.tspan.setAttributeNS(null, 'y', pf(-current.y)); - current.xcoords = []; + var promise = this.messageHandler.sendWithPromise('GetPage', { + pageIndex: pageIndex + }).then(function (pageInfo) { + if (this.destroyed) { + throw new Error('Transport destroyed'); + } + var page = new PDFPageProxy(pageIndex, pageInfo, this); + this.pageCache[pageIndex] = page; + return page; + }.bind(this)); + this.pagePromises[pageIndex] = promise; + return promise; }, - endText: function SVGGraphics_endText() { - if (this.current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); - } - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); + getPageIndex: function WorkerTransport_getPageIndexByRef(ref) { + return this.messageHandler.sendWithPromise('GetPageIndex', { ref: ref }); }, - // Path properties - setLineWidth: function SVGGraphics_setLineWidth(width) { - this.current.lineWidth = width; + getAnnotations: function WorkerTransport_getAnnotations(pageIndex, intent) { + return this.messageHandler.sendWithPromise('GetAnnotations', { + pageIndex: pageIndex, + intent: intent, + }); }, - setLineCap: function SVGGraphics_setLineCap(style) { - this.current.lineCap = LINE_CAP_STYLES[style]; + + getDestinations: function WorkerTransport_getDestinations() { + return this.messageHandler.sendWithPromise('GetDestinations', null); }, - setLineJoin: function SVGGraphics_setLineJoin(style) { - this.current.lineJoin = LINE_JOIN_STYLES[style]; + + getDestination: function WorkerTransport_getDestination(id) { + return this.messageHandler.sendWithPromise('GetDestination', { id: id }); }, - setMiterLimit: function SVGGraphics_setMiterLimit(limit) { - this.current.miterLimit = limit; + + getAttachments: function WorkerTransport_getAttachments() { + return this.messageHandler.sendWithPromise('GetAttachments', null); }, - setStrokeRGBColor: function SVGGraphics_setStrokeRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.current.strokeColor = color; + + getJavaScript: function WorkerTransport_getJavaScript() { + return this.messageHandler.sendWithPromise('GetJavaScript', null); }, - setFillRGBColor: function SVGGraphics_setFillRGBColor(r, g, b) { - var color = Util.makeCssRgb(r, g, b); - this.current.fillColor = color; - this.current.tspan = document.createElementNS(NS, 'svg:tspan'); - this.current.xcoords = []; + + getOutline: function WorkerTransport_getOutline() { + return this.messageHandler.sendWithPromise('GetOutline', null); }, - setDash: function SVGGraphics_setDash(dashArray, dashPhase) { - this.current.dashArray = dashArray; - this.current.dashPhase = dashPhase; + + getMetadata: function WorkerTransport_getMetadata() { + return this.messageHandler.sendWithPromise('GetMetadata', null). + then(function transportMetadata(results) { + return { + info: results[0], + metadata: (results[1] ? new PDFJS.Metadata(results[1]) : null) + }; + }); }, - constructPath: function SVGGraphics_constructPath(ops, args) { - var current = this.current; - var x = current.x, y = current.y; - current.path = document.createElementNS(NS, 'svg:path'); - var d = []; - var opLength = ops.length; + getStats: function WorkerTransport_getStats() { + return this.messageHandler.sendWithPromise('GetStats', null); + }, - for (var i = 0, j = 0; i < opLength; i++) { - switch (ops[i] | 0) { - case OPS.rectangle: - x = args[j++]; - y = args[j++]; - var width = args[j++]; - var height = args[j++]; - var xw = x + width; - var yh = y + height; - d.push('M', pf(x), pf(y), 'L', pf(xw) , pf(y), 'L', pf(xw), pf(yh), - 'L', pf(x), pf(yh), 'Z'); - break; - case OPS.moveTo: - x = args[j++]; - y = args[j++]; - d.push('M', pf(x), pf(y)); - break; - case OPS.lineTo: - x = args[j++]; - y = args[j++]; - d.push('L', pf(x) , pf(y)); - break; - case OPS.curveTo: - x = args[j + 4]; - y = args[j + 5]; - d.push('C', pf(args[j]), pf(args[j + 1]), pf(args[j + 2]), - pf(args[j + 3]), pf(x), pf(y)); - j += 6; - break; - case OPS.curveTo2: - x = args[j + 2]; - y = args[j + 3]; - d.push('C', pf(x), pf(y), pf(args[j]), pf(args[j + 1]), - pf(args[j + 2]), pf(args[j + 3])); - j += 4; - break; - case OPS.curveTo3: - x = args[j + 2]; - y = args[j + 3]; - d.push('C', pf(args[j]), pf(args[j + 1]), pf(x), pf(y), - pf(x), pf(y)); - j += 4; - break; - case OPS.closePath: - d.push('Z'); - break; + startCleanup: function WorkerTransport_startCleanup() { + this.messageHandler.sendWithPromise('Cleanup', null). + then(function endCleanup() { + for (var i = 0, ii = this.pageCache.length; i < ii; i++) { + var page = this.pageCache[i]; + if (page) { + page.cleanup(); + } } - } - current.path.setAttributeNS(null, 'd', d.join(' ')); - current.path.setAttributeNS(null, 'stroke-miterlimit', - pf(current.miterLimit)); - current.path.setAttributeNS(null, 'stroke-linecap', current.lineCap); - current.path.setAttributeNS(null, 'stroke-linejoin', current.lineJoin); - current.path.setAttributeNS(null, 'stroke-width', - pf(current.lineWidth) + 'px'); - current.path.setAttributeNS(null, 'stroke-dasharray', - current.dashArray.map(pf).join(' ')); - current.path.setAttributeNS(null, 'stroke-dashoffset', - pf(current.dashPhase) + 'px'); - current.path.setAttributeNS(null, 'fill', 'none'); + this.commonObjs.clear(); + this.fontLoader.clear(); + }.bind(this)); + } + }; + return WorkerTransport; - this.tgrp.appendChild(current.path); - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); +})(); + +/** + * A PDF document and page is built of many objects. E.g. there are objects + * for fonts, images, rendering code and such. These objects might get processed + * inside of a worker. The `PDFObjects` implements some basic functions to + * manage these objects. + * @ignore + */ +var PDFObjects = (function PDFObjectsClosure() { + function PDFObjects() { + this.objs = {}; + } + + PDFObjects.prototype = { + /** + * Internal function. + * Ensures there is an object defined for `objId`. + */ + ensureObj: function PDFObjects_ensureObj(objId) { + if (this.objs[objId]) { + return this.objs[objId]; } - // Saving a reference in current.element so that it can be addressed - // in 'fill' and 'stroke' - current.element = current.path; - current.setCurrentPoint(x, y); + + var obj = { + capability: createPromiseCapability(), + data: null, + resolved: false + }; + this.objs[objId] = obj; + + return obj; }, - endPath: function SVGGraphics_endPath() { - var current = this.current; - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); + /** + * If called *without* callback, this returns the data of `objId` but the + * object needs to be resolved. If it isn't, this function throws. + * + * If called *with* a callback, the callback is called with the data of the + * object once the object is resolved. That means, if you call this + * function and the object is already resolved, the callback gets called + * right away. + */ + get: function PDFObjects_get(objId, callback) { + // If there is a callback, then the get can be async and the object is + // not required to be resolved right now + if (callback) { + this.ensureObj(objId).capability.promise.then(callback); + return null; } - this.tgrp = document.createElementNS(NS, 'svg:g'); - this.tgrp.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - }, - clip: function SVGGraphics_clip(type) { - var current = this.current; - // Add current path to clipping path - current.clipId = 'clippath' + clipCount; - clipCount++; - this.clippath = document.createElementNS(NS, 'svg:clipPath'); - this.clippath.setAttributeNS(null, 'id', current.clipId); - var clipElement = current.element.cloneNode(); - if (type === 'evenodd') { - clipElement.setAttributeNS(null, 'clip-rule', 'evenodd'); - } else { - clipElement.setAttributeNS(null, 'clip-rule', 'nonzero'); + // If there isn't a callback, the user expects to get the resolved data + // directly. + var obj = this.objs[objId]; + + // If there isn't an object yet or the object isn't resolved, then the + // data isn't ready yet! + if (!obj || !obj.resolved) { + error('Requesting object that isn\'t resolved yet ' + objId); } - this.clippath.setAttributeNS(null, 'transform', pm(this.transformMatrix)); - this.clippath.appendChild(clipElement); - this.defs.appendChild(this.clippath); - // Create a new group with that attribute - current.pendingClip = true; - this.cgrp = document.createElementNS(NS, 'svg:g'); - this.cgrp.setAttributeNS(null, 'clip-path', - 'url(#' + current.clipId + ')'); - this.pgrp.appendChild(this.cgrp); + return obj.data; }, - closePath: function SVGGraphics_closePath() { - var current = this.current; - var d = current.path.getAttributeNS(null, 'd'); - d += 'Z'; - current.path.setAttributeNS(null, 'd', d); + /** + * Resolves the object `objId` with optional `data`. + */ + resolve: function PDFObjects_resolve(objId, data) { + var obj = this.ensureObj(objId); + + obj.resolved = true; + obj.data = data; + obj.capability.resolve(data); }, - setLeading: function SVGGraphics_setLeading(leading) { - this.current.leading = -leading; + isResolved: function PDFObjects_isResolved(objId) { + var objs = this.objs; + + if (!objs[objId]) { + return false; + } else { + return objs[objId].resolved; + } }, - setTextRise: function SVGGraphics_setTextRise(textRise) { - this.current.textRise = textRise; + hasData: function PDFObjects_hasData(objId) { + return this.isResolved(objId); }, - setHScale: function SVGGraphics_setHScale(scale) { - this.current.textHScale = scale / 100; + /** + * Returns the data of `objId` if object exists, null otherwise. + */ + getData: function PDFObjects_getData(objId) { + var objs = this.objs; + if (!objs[objId] || !objs[objId].resolved) { + return null; + } else { + return objs[objId].data; + } }, - setGState: function SVGGraphics_setGState(states) { - for (var i = 0, ii = states.length; i < ii; i++) { - var state = states[i]; - var key = state[0]; - var value = state[1]; + clear: function PDFObjects_clear() { + this.objs = {}; + } + }; + return PDFObjects; +})(); - switch (key) { - case 'LW': - this.setLineWidth(value); - break; - case 'LC': - this.setLineCap(value); - break; - case 'LJ': - this.setLineJoin(value); - break; - case 'ML': - this.setMiterLimit(value); - break; - case 'D': - this.setDash(value[0], value[1]); - break; - case 'RI': - break; - case 'FL': - break; - case 'Font': - this.setFont(value); - break; - case 'CA': - break; - case 'ca': - break; - case 'BM': - break; - case 'SMask': - break; - } - } +/** + * Allows controlling of the rendering tasks. + * @class + * @alias RenderTask + */ +var RenderTask = (function RenderTaskClosure() { + function RenderTask(internalRenderTask) { + this._internalRenderTask = internalRenderTask; + + /** + * Callback for incremental rendering -- a function that will be called + * each time the rendering is paused. To continue rendering call the + * function that is the first argument to the callback. + * @type {function} + */ + this.onContinue = null; + } + + RenderTask.prototype = /** @lends RenderTask.prototype */ { + /** + * Promise for rendering task completion. + * @return {Promise} + */ + get promise() { + return this._internalRenderTask.capability.promise; }, - fill: function SVGGraphics_fill() { - var current = this.current; - current.element.setAttributeNS(null, 'fill', current.fillColor); + /** + * Cancels the rendering task. If the task is currently rendering it will + * not be cancelled until graphics pauses with a timeout. The promise that + * this object extends will resolved when cancelled. + */ + cancel: function RenderTask_cancel() { + this._internalRenderTask.cancel(); }, - stroke: function SVGGraphics_stroke() { - var current = this.current; - current.element.setAttributeNS(null, 'stroke', current.strokeColor); - current.element.setAttributeNS(null, 'fill', 'none'); - }, + /** + * Registers callbacks to indicate the rendering task completion. + * + * @param {function} onFulfilled The callback for the rendering completion. + * @param {function} onRejected The callback for the rendering failure. + * @return {Promise} A promise that is resolved after the onFulfilled or + * onRejected callback. + */ + then: function RenderTask_then(onFulfilled, onRejected) { + return this.promise.then.apply(this.promise, arguments); + } + }; + + return RenderTask; +})(); + +/** + * For internal use only. + * @ignore + */ +var InternalRenderTask = (function InternalRenderTaskClosure() { - eoFill: function SVGGraphics_eoFill() { - var current = this.current; - current.element.setAttributeNS(null, 'fill', current.fillColor); - current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); - }, + function InternalRenderTask(callback, params, objs, commonObjs, operatorList, + pageNumber) { + this.callback = callback; + this.params = params; + this.objs = objs; + this.commonObjs = commonObjs; + this.operatorListIdx = null; + this.operatorList = operatorList; + this.pageNumber = pageNumber; + this.running = false; + this.graphicsReadyCallback = null; + this.graphicsReady = false; + this.useRequestAnimationFrame = false; + this.cancelled = false; + this.capability = createPromiseCapability(); + this.task = new RenderTask(this); + // caching this-bound methods + this._continueBound = this._continue.bind(this); + this._scheduleNextBound = this._scheduleNext.bind(this); + this._nextBound = this._next.bind(this); + } - fillStroke: function SVGGraphics_fillStroke() { - // Order is important since stroke wants fill to be none. - // First stroke, then if fill needed, it will be overwritten. - this.stroke(); - this.fill(); - }, + InternalRenderTask.prototype = { - eoFillStroke: function SVGGraphics_eoFillStroke() { - this.current.element.setAttributeNS(null, 'fill-rule', 'evenodd'); - this.fillStroke(); - }, + initalizeGraphics: + function InternalRenderTask_initalizeGraphics(transparency) { - closeStroke: function SVGGraphics_closeStroke() { - this.closePath(); - this.stroke(); - }, + if (this.cancelled) { + return; + } + if (PDFJS.pdfBug && 'StepperManager' in globalScope && + globalScope.StepperManager.enabled) { + this.stepper = globalScope.StepperManager.create(this.pageNumber - 1); + this.stepper.init(this.operatorList); + this.stepper.nextBreakPoint = this.stepper.getNextBreakPoint(); + } - closeFillStroke: function SVGGraphics_closeFillStroke() { - this.closePath(); - this.fillStroke(); + var params = this.params; + this.gfx = new CanvasGraphics(params.canvasContext, this.commonObjs, + this.objs, params.imageLayer); + + this.gfx.beginDrawing(params.transform, params.viewport, transparency); + this.operatorListIdx = 0; + this.graphicsReady = true; + if (this.graphicsReadyCallback) { + this.graphicsReadyCallback(); + } }, - paintSolidColorImageMask: - function SVGGraphics_paintSolidColorImageMask() { - var current = this.current; - var rect = document.createElementNS(NS, 'svg:rect'); - rect.setAttributeNS(null, 'x', '0'); - rect.setAttributeNS(null, 'y', '0'); - rect.setAttributeNS(null, 'width', '1px'); - rect.setAttributeNS(null, 'height', '1px'); - rect.setAttributeNS(null, 'fill', current.fillColor); - this.tgrp.appendChild(rect); + cancel: function InternalRenderTask_cancel() { + this.running = false; + this.cancelled = true; + this.callback('cancelled'); }, - paintJpegXObject: function SVGGraphics_paintJpegXObject(objId, w, h) { - var current = this.current; - var imgObj = this.objs.get(objId); - var imgEl = document.createElementNS(NS, 'svg:image'); - imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgObj.src); - imgEl.setAttributeNS(null, 'width', imgObj.width + 'px'); - imgEl.setAttributeNS(null, 'height', imgObj.height + 'px'); - imgEl.setAttributeNS(null, 'x', '0'); - imgEl.setAttributeNS(null, 'y', pf(-h)); - imgEl.setAttributeNS(null, 'transform', - 'scale(' + pf(1 / w) + ' ' + pf(-1 / h) + ')'); + operatorListChanged: function InternalRenderTask_operatorListChanged() { + if (!this.graphicsReady) { + if (!this.graphicsReadyCallback) { + this.graphicsReadyCallback = this._continueBound; + } + return; + } - this.tgrp.appendChild(imgEl); - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); - } else { - this.pgrp.appendChild(this.tgrp); + if (this.stepper) { + this.stepper.updateOperatorList(this.operatorList); } - }, - paintImageXObject: function SVGGraphics_paintImageXObject(objId) { - var imgData = this.objs.get(objId); - if (!imgData) { - warn('Dependent image isn\'t ready yet'); + if (this.running) { return; } - this.paintInlineImageXObject(imgData); + this._continue(); }, - paintInlineImageXObject: - function SVGGraphics_paintInlineImageXObject(imgData, mask) { - var current = this.current; - var width = imgData.width; - var height = imgData.height; - - var imgSrc = convertImgDataToPng(imgData); - var cliprect = document.createElementNS(NS, 'svg:rect'); - cliprect.setAttributeNS(null, 'x', '0'); - cliprect.setAttributeNS(null, 'y', '0'); - cliprect.setAttributeNS(null, 'width', pf(width)); - cliprect.setAttributeNS(null, 'height', pf(height)); - current.element = cliprect; - this.clip('nonzero'); - var imgEl = document.createElementNS(NS, 'svg:image'); - imgEl.setAttributeNS(XLINK_NS, 'xlink:href', imgSrc); - imgEl.setAttributeNS(null, 'x', '0'); - imgEl.setAttributeNS(null, 'y', pf(-height)); - imgEl.setAttributeNS(null, 'width', pf(width) + 'px'); - imgEl.setAttributeNS(null, 'height', pf(height) + 'px'); - imgEl.setAttributeNS(null, 'transform', - 'scale(' + pf(1 / width) + ' ' + - pf(-1 / height) + ')'); - if (mask) { - mask.appendChild(imgEl); - } else { - this.tgrp.appendChild(imgEl); + _continue: function InternalRenderTask__continue() { + this.running = true; + if (this.cancelled) { + return; } - if (current.pendingClip) { - this.cgrp.appendChild(this.tgrp); - this.pgrp.appendChild(this.cgrp); + if (this.task.onContinue) { + this.task.onContinue.call(this.task, this._scheduleNextBound); } else { - this.pgrp.appendChild(this.tgrp); + this._scheduleNext(); } }, - paintImageMaskXObject: - function SVGGraphics_paintImageMaskXObject(imgData) { - var current = this.current; - var width = imgData.width; - var height = imgData.height; - var fillColor = current.fillColor; - - current.maskId = 'mask' + maskCount++; - var mask = document.createElementNS(NS, 'svg:mask'); - mask.setAttributeNS(null, 'id', current.maskId); - - var rect = document.createElementNS(NS, 'svg:rect'); - rect.setAttributeNS(null, 'x', '0'); - rect.setAttributeNS(null, 'y', '0'); - rect.setAttributeNS(null, 'width', pf(width)); - rect.setAttributeNS(null, 'height', pf(height)); - rect.setAttributeNS(null, 'fill', fillColor); - rect.setAttributeNS(null, 'mask', 'url(#' + current.maskId +')'); - this.defs.appendChild(mask); - this.tgrp.appendChild(rect); - - this.paintInlineImageXObject(imgData, mask); + _scheduleNext: function InternalRenderTask__scheduleNext() { + if (this.useRequestAnimationFrame) { + window.requestAnimationFrame(this._nextBound); + } else { + Promise.resolve(undefined).then(this._nextBound); + } }, - paintFormXObjectBegin: - function SVGGraphics_paintFormXObjectBegin(matrix, bbox) { - this.save(); - - if (isArray(matrix) && matrix.length === 6) { - this.transform(matrix[0], matrix[1], matrix[2], - matrix[3], matrix[4], matrix[5]); + _next: function InternalRenderTask__next() { + if (this.cancelled) { + return; + } + this.operatorListIdx = this.gfx.executeOperatorList(this.operatorList, + this.operatorListIdx, + this._continueBound, + this.stepper); + if (this.operatorListIdx === this.operatorList.argsArray.length) { + this.running = false; + if (this.operatorList.lastChunk) { + this.gfx.endDrawing(); + this.callback(); + } } + } - if (isArray(bbox) && bbox.length === 4) { - var width = bbox[2] - bbox[0]; - var height = bbox[3] - bbox[1]; + }; - var cliprect = document.createElementNS(NS, 'svg:rect'); - cliprect.setAttributeNS(null, 'x', bbox[0]); - cliprect.setAttributeNS(null, 'y', bbox[1]); - cliprect.setAttributeNS(null, 'width', pf(width)); - cliprect.setAttributeNS(null, 'height', pf(height)); - this.current.element = cliprect; - this.clip('nonzero'); - this.endPath(); - } - }, + return InternalRenderTask; +})(); - paintFormXObjectEnd: - function SVGGraphics_paintFormXObjectEnd() { - this.restore(); +/** + * (Deprecated) Global observer of unsupported feature usages. Use + * onUnsupportedFeature callback of the {PDFDocumentLoadingTask} instance. + */ +PDFJS.UnsupportedManager = (function UnsupportedManagerClosure() { + var listeners = []; + return { + listen: function (cb) { + deprecated('Global UnsupportedManager.listen is used: ' + + ' use PDFDocumentLoadingTask.onUnsupportedFeature instead'); + listeners.push(cb); + }, + notify: function (featureId) { + for (var i = 0, ii = listeners.length; i < ii; i++) { + listeners[i](featureId); + } } }; - return SVGGraphics; })(); -PDFJS.SVGGraphics = SVGGraphics; - -exports.SVGGraphics = SVGGraphics; +exports.getDocument = PDFJS.getDocument; +exports.PDFDataRangeTransport = PDFDataRangeTransport; +exports.PDFDocumentProxy = PDFDocumentProxy; +exports.PDFPageProxy = PDFPageProxy; })); diff --git a/build/pdf.worker.js b/build/pdf.worker.js index 572062a99..dbe48b181 100644 --- a/build/pdf.worker.js +++ b/build/pdf.worker.js @@ -21,8 +21,8 @@ if (typeof PDFJS === 'undefined') { typeof global !== 'undefined' ? global : this).PDFJS = {}; } -PDFJS.version = '1.3.137'; -PDFJS.build = 'b8e7efa'; +PDFJS.version = '1.3.142'; +PDFJS.build = 'e8db825'; (function pdfjsWrapper() { // Use strict in our context only - users might not want it @@ -32,2245 +32,298 @@ PDFJS.build = 'b8e7efa'; (function (root, factory) { { - factory((root.pdfjsSharedGlobal = {})); + factory((root.pdfjsCoreArithmeticDecoder = {})); } }(this, function (exports) { - var globalScope = (typeof window !== 'undefined') ? window : - (typeof global !== 'undefined') ? global : - (typeof self !== 'undefined') ? self : this; - - var isWorker = (typeof window === 'undefined'); - - // The global PDFJS object exposes the API - // In production, it will be declared outside a global wrapper - // In development, it will be declared here - if (!globalScope.PDFJS) { - globalScope.PDFJS = {}; - } +/* This class implements the QM Coder decoding as defined in + * JPEG 2000 Part I Final Committee Draft Version 1.0 + * Annex C.3 Arithmetic decoding procedure + * available at http://www.jpeg.org/public/fcd15444-1.pdf + * + * The arithmetic decoder is used in conjunction with context models to decode + * JPEG2000 and JBIG2 streams. + */ +var ArithmeticDecoder = (function ArithmeticDecoderClosure() { + // Table C-2 + var QeTable = [ + {qe: 0x5601, nmps: 1, nlps: 1, switchFlag: 1}, + {qe: 0x3401, nmps: 2, nlps: 6, switchFlag: 0}, + {qe: 0x1801, nmps: 3, nlps: 9, switchFlag: 0}, + {qe: 0x0AC1, nmps: 4, nlps: 12, switchFlag: 0}, + {qe: 0x0521, nmps: 5, nlps: 29, switchFlag: 0}, + {qe: 0x0221, nmps: 38, nlps: 33, switchFlag: 0}, + {qe: 0x5601, nmps: 7, nlps: 6, switchFlag: 1}, + {qe: 0x5401, nmps: 8, nlps: 14, switchFlag: 0}, + {qe: 0x4801, nmps: 9, nlps: 14, switchFlag: 0}, + {qe: 0x3801, nmps: 10, nlps: 14, switchFlag: 0}, + {qe: 0x3001, nmps: 11, nlps: 17, switchFlag: 0}, + {qe: 0x2401, nmps: 12, nlps: 18, switchFlag: 0}, + {qe: 0x1C01, nmps: 13, nlps: 20, switchFlag: 0}, + {qe: 0x1601, nmps: 29, nlps: 21, switchFlag: 0}, + {qe: 0x5601, nmps: 15, nlps: 14, switchFlag: 1}, + {qe: 0x5401, nmps: 16, nlps: 14, switchFlag: 0}, + {qe: 0x5101, nmps: 17, nlps: 15, switchFlag: 0}, + {qe: 0x4801, nmps: 18, nlps: 16, switchFlag: 0}, + {qe: 0x3801, nmps: 19, nlps: 17, switchFlag: 0}, + {qe: 0x3401, nmps: 20, nlps: 18, switchFlag: 0}, + {qe: 0x3001, nmps: 21, nlps: 19, switchFlag: 0}, + {qe: 0x2801, nmps: 22, nlps: 19, switchFlag: 0}, + {qe: 0x2401, nmps: 23, nlps: 20, switchFlag: 0}, + {qe: 0x2201, nmps: 24, nlps: 21, switchFlag: 0}, + {qe: 0x1C01, nmps: 25, nlps: 22, switchFlag: 0}, + {qe: 0x1801, nmps: 26, nlps: 23, switchFlag: 0}, + {qe: 0x1601, nmps: 27, nlps: 24, switchFlag: 0}, + {qe: 0x1401, nmps: 28, nlps: 25, switchFlag: 0}, + {qe: 0x1201, nmps: 29, nlps: 26, switchFlag: 0}, + {qe: 0x1101, nmps: 30, nlps: 27, switchFlag: 0}, + {qe: 0x0AC1, nmps: 31, nlps: 28, switchFlag: 0}, + {qe: 0x09C1, nmps: 32, nlps: 29, switchFlag: 0}, + {qe: 0x08A1, nmps: 33, nlps: 30, switchFlag: 0}, + {qe: 0x0521, nmps: 34, nlps: 31, switchFlag: 0}, + {qe: 0x0441, nmps: 35, nlps: 32, switchFlag: 0}, + {qe: 0x02A1, nmps: 36, nlps: 33, switchFlag: 0}, + {qe: 0x0221, nmps: 37, nlps: 34, switchFlag: 0}, + {qe: 0x0141, nmps: 38, nlps: 35, switchFlag: 0}, + {qe: 0x0111, nmps: 39, nlps: 36, switchFlag: 0}, + {qe: 0x0085, nmps: 40, nlps: 37, switchFlag: 0}, + {qe: 0x0049, nmps: 41, nlps: 38, switchFlag: 0}, + {qe: 0x0025, nmps: 42, nlps: 39, switchFlag: 0}, + {qe: 0x0015, nmps: 43, nlps: 40, switchFlag: 0}, + {qe: 0x0009, nmps: 44, nlps: 41, switchFlag: 0}, + {qe: 0x0005, nmps: 45, nlps: 42, switchFlag: 0}, + {qe: 0x0001, nmps: 45, nlps: 43, switchFlag: 0}, + {qe: 0x5601, nmps: 46, nlps: 46, switchFlag: 0} + ]; - globalScope.PDFJS.pdfBug = false; + // C.3.5 Initialisation of the decoder (INITDEC) + function ArithmeticDecoder(data, start, end) { + this.data = data; + this.bp = start; + this.dataEnd = end; - exports.globalScope = globalScope; - exports.isWorker = isWorker; - exports.PDFJS = globalScope.PDFJS; -})); + this.chigh = data[start]; + this.clow = 0; + this.byteIn(); -(function (root, factory) { - { - factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal); + this.chigh = ((this.chigh << 7) & 0xFFFF) | ((this.clow >> 9) & 0x7F); + this.clow = (this.clow << 7) & 0xFFFF; + this.ct -= 7; + this.a = 0x8000; } -}(this, function (exports, sharedGlobal) { - -var PDFJS = sharedGlobal.PDFJS; -var globalScope = sharedGlobal.globalScope; -var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0]; + ArithmeticDecoder.prototype = { + // C.3.4 Compressed data input (BYTEIN) + byteIn: function ArithmeticDecoder_byteIn() { + var data = this.data; + var bp = this.bp; + if (data[bp] === 0xFF) { + var b1 = data[bp + 1]; + if (b1 > 0x8F) { + this.clow += 0xFF00; + this.ct = 8; + } else { + bp++; + this.clow += (data[bp] << 9); + this.ct = 7; + this.bp = bp; + } + } else { + bp++; + this.clow += bp < this.dataEnd ? (data[bp] << 8) : 0xFF00; + this.ct = 8; + this.bp = bp; + } + if (this.clow > 0xFFFF) { + this.chigh += (this.clow >> 16); + this.clow &= 0xFFFF; + } + }, + // C.3.2 Decoding a decision (DECODE) + readBit: function ArithmeticDecoder_readBit(contexts, pos) { + // contexts are packed into 1 byte: + // highest 7 bits carry cx.index, lowest bit carries cx.mps + var cx_index = contexts[pos] >> 1, cx_mps = contexts[pos] & 1; + var qeTableIcx = QeTable[cx_index]; + var qeIcx = qeTableIcx.qe; + var d; + var a = this.a - qeIcx; -var TextRenderingMode = { - FILL: 0, - STROKE: 1, - FILL_STROKE: 2, - INVISIBLE: 3, - FILL_ADD_TO_PATH: 4, - STROKE_ADD_TO_PATH: 5, - FILL_STROKE_ADD_TO_PATH: 6, - ADD_TO_PATH: 7, - FILL_STROKE_MASK: 3, - ADD_TO_PATH_FLAG: 4 -}; + if (this.chigh < qeIcx) { + // exchangeLps + if (a < qeIcx) { + a = qeIcx; + d = cx_mps; + cx_index = qeTableIcx.nmps; + } else { + a = qeIcx; + d = 1 ^ cx_mps; + if (qeTableIcx.switchFlag === 1) { + cx_mps = d; + } + cx_index = qeTableIcx.nlps; + } + } else { + this.chigh -= qeIcx; + if ((a & 0x8000) !== 0) { + this.a = a; + return cx_mps; + } + // exchangeMps + if (a < qeIcx) { + d = 1 ^ cx_mps; + if (qeTableIcx.switchFlag === 1) { + cx_mps = d; + } + cx_index = qeTableIcx.nlps; + } else { + d = cx_mps; + cx_index = qeTableIcx.nmps; + } + } + // C.3.3 renormD; + do { + if (this.ct === 0) { + this.byteIn(); + } -var ImageKind = { - GRAYSCALE_1BPP: 1, - RGB_24BPP: 2, - RGBA_32BPP: 3 -}; + a <<= 1; + this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1); + this.clow = (this.clow << 1) & 0xFFFF; + this.ct--; + } while ((a & 0x8000) === 0); + this.a = a; -var AnnotationType = { - TEXT: 1, - LINK: 2, - FREETEXT: 3, - LINE: 4, - SQUARE: 5, - CIRCLE: 6, - POLYGON: 7, - POLYLINE: 8, - HIGHLIGHT: 9, - UNDERLINE: 10, - SQUIGGLY: 11, - STRIKEOUT: 12, - STAMP: 13, - CARET: 14, - INK: 15, - POPUP: 16, - FILEATTACHMENT: 17, - SOUND: 18, - MOVIE: 19, - WIDGET: 20, - SCREEN: 21, - PRINTERMARK: 22, - TRAPNET: 23, - WATERMARK: 24, - THREED: 25, - REDACT: 26 -}; + contexts[pos] = cx_index << 1 | cx_mps; + return d; + } + }; -var AnnotationFlag = { - INVISIBLE: 0x01, - HIDDEN: 0x02, - PRINT: 0x04, - NOZOOM: 0x08, - NOROTATE: 0x10, - NOVIEW: 0x20, - READONLY: 0x40, - LOCKED: 0x80, - TOGGLENOVIEW: 0x100, - LOCKEDCONTENTS: 0x200 -}; + return ArithmeticDecoder; +})(); -var AnnotationBorderStyleType = { - SOLID: 1, - DASHED: 2, - BEVELED: 3, - INSET: 4, - UNDERLINE: 5 -}; +exports.ArithmeticDecoder = ArithmeticDecoder; +})); -var StreamType = { - UNKNOWN: 0, - FLATE: 1, - LZW: 2, - DCT: 3, - JPX: 4, - JBIG: 5, - A85: 6, - AHX: 7, - CCF: 8, - RL: 9 -}; -var FontType = { - UNKNOWN: 0, - TYPE1: 1, - TYPE1C: 2, - CIDFONTTYPE0: 3, - CIDFONTTYPE0C: 4, - TRUETYPE: 5, - CIDFONTTYPE2: 6, - TYPE3: 7, - OPENTYPE: 8, - TYPE0: 9, - MMTYPE1: 10 -}; +(function (root, factory) { + { + factory((root.pdfjsCoreCharsets = {})); + } +}(this, function (exports) { -PDFJS.VERBOSITY_LEVELS = { - errors: 0, - warnings: 1, - infos: 5 -}; +var ISOAdobeCharset = [ + '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', + 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', + 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', + 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', + 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', + 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', + 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', + 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', + 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', + 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', + 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', + 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', + 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', + 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', + 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', + 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', + 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', + 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', + 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', + 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', + 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', + 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', + 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', + 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', + 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', + 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', + 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', + 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', + 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', + 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', + 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', + 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', + 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', + 'ugrave', 'yacute', 'ydieresis', 'zcaron' +]; -// All the possible operations for an operator list. -var OPS = PDFJS.OPS = { - // Intentionally start from 1 so it is easy to spot bad operators that will be - // 0's. - dependency: 1, - setLineWidth: 2, - setLineCap: 3, - setLineJoin: 4, - setMiterLimit: 5, - setDash: 6, - setRenderingIntent: 7, - setFlatness: 8, - setGState: 9, - save: 10, - restore: 11, - transform: 12, - moveTo: 13, - lineTo: 14, - curveTo: 15, - curveTo2: 16, - curveTo3: 17, - closePath: 18, - rectangle: 19, - stroke: 20, - closeStroke: 21, - fill: 22, - eoFill: 23, - fillStroke: 24, - eoFillStroke: 25, - closeFillStroke: 26, - closeEOFillStroke: 27, - endPath: 28, - clip: 29, - eoClip: 30, - beginText: 31, - endText: 32, - setCharSpacing: 33, - setWordSpacing: 34, - setHScale: 35, - setLeading: 36, - setFont: 37, - setTextRenderingMode: 38, - setTextRise: 39, - moveText: 40, - setLeadingMoveText: 41, - setTextMatrix: 42, - nextLine: 43, - showText: 44, - showSpacedText: 45, - nextLineShowText: 46, - nextLineSetSpacingShowText: 47, - setCharWidth: 48, - setCharWidthAndBounds: 49, - setStrokeColorSpace: 50, - setFillColorSpace: 51, - setStrokeColor: 52, - setStrokeColorN: 53, - setFillColor: 54, - setFillColorN: 55, - setStrokeGray: 56, - setFillGray: 57, - setStrokeRGBColor: 58, - setFillRGBColor: 59, - setStrokeCMYKColor: 60, - setFillCMYKColor: 61, - shadingFill: 62, - beginInlineImage: 63, - beginImageData: 64, - endInlineImage: 65, - paintXObject: 66, - markPoint: 67, - markPointProps: 68, - beginMarkedContent: 69, - beginMarkedContentProps: 70, - endMarkedContent: 71, - beginCompat: 72, - endCompat: 73, - paintFormXObjectBegin: 74, - paintFormXObjectEnd: 75, - beginGroup: 76, - endGroup: 77, - beginAnnotations: 78, - endAnnotations: 79, - beginAnnotation: 80, - endAnnotation: 81, - paintJpegXObject: 82, - paintImageMaskXObject: 83, - paintImageMaskXObjectGroup: 84, - paintImageXObject: 85, - paintInlineImageXObject: 86, - paintInlineImageXObjectGroup: 87, - paintImageXObjectRepeat: 88, - paintImageMaskXObjectRepeat: 89, - paintSolidColorImageMask: 90, - constructPath: 91 -}; +var ExpertCharset = [ + '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', + 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', + 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', + 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', + 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', + 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', + 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', + 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', + 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', + 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', + 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', + 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', + 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', + 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', + 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', + 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', + 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', + 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', + 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', + 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', + 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', + 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', + 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', + 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', + 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', + 'Ydieresissmall' +]; -// A notice for devs. These are good for things that are helpful to devs, such -// as warning that Workers were disabled, which is important to devs but not -// end users. -function info(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) { - console.log('Info: ' + msg); - } -} +var ExpertSubsetCharset = [ + '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', + 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', + 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', + 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', + 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', + 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', + 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', + 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', + 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', + 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', + 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', + 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', + 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', + 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', + 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', + 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', + 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', + 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', + 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', + 'periodinferior', 'commainferior' +]; -// Non-fatal warnings. -function warn(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) { - console.log('Warning: ' + msg); - } -} +exports.ISOAdobeCharset = ISOAdobeCharset; +exports.ExpertCharset = ExpertCharset; +exports.ExpertSubsetCharset = ExpertSubsetCharset; +})); -// Deprecated API function -- treated as warnings. -function deprecated(details) { - warn('Deprecated API usage: ' + details); -} -// Fatal errors that should trigger the fallback UI and halt execution by -// throwing an exception. -function error(msg) { - if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) { - console.log('Error: ' + msg); - console.log(backtrace()); +(function (root, factory) { + { + factory((root.pdfjsCoreGlyphList = {})); } - throw new Error(msg); -} - -function backtrace() { - try { - throw new Error(); - } catch (e) { - return e.stack ? e.stack.split('\n').slice(2).join('\n') : ''; - } -} - -function assert(cond, msg) { - if (!cond) { - error(msg); - } -} - -var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = { - unknown: 'unknown', - forms: 'forms', - javaScript: 'javaScript', - smask: 'smask', - shadingPattern: 'shadingPattern', - font: 'font' -}; - -// Combines two URLs. The baseUrl shall be absolute URL. If the url is an -// absolute URL, it will be returned as is. -function combineUrl(baseUrl, url) { - if (!url) { - return baseUrl; - } - if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) { - return url; - } - var i; - if (url.charAt(0) === '/') { - // absolute path - i = baseUrl.indexOf('://'); - if (url.charAt(1) === '/') { - ++i; - } else { - i = baseUrl.indexOf('/', i + 3); - } - return baseUrl.substring(0, i) + url; - } else { - // relative path - var pathLength = baseUrl.length; - i = baseUrl.lastIndexOf('#'); - pathLength = i >= 0 ? i : pathLength; - i = baseUrl.lastIndexOf('?', pathLength); - pathLength = i >= 0 ? i : pathLength; - var prefixLength = baseUrl.lastIndexOf('/', pathLength); - return baseUrl.substring(0, prefixLength + 1) + url; - } -} - -// Validates if URL is safe and allowed, e.g. to avoid XSS. -function isValidUrl(url, allowRelative) { - if (!url) { - return false; - } - // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1) - // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) - var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url); - if (!protocol) { - return allowRelative; - } - protocol = protocol[0].toLowerCase(); - switch (protocol) { - case 'http': - case 'https': - case 'ftp': - case 'mailto': - case 'tel': - return true; - default: - return false; - } -} -PDFJS.isValidUrl = isValidUrl; - -function shadow(obj, prop, value) { - Object.defineProperty(obj, prop, { value: value, - enumerable: true, - configurable: true, - writable: false }); - return value; -} -PDFJS.shadow = shadow; - -var LinkTarget = PDFJS.LinkTarget = { - NONE: 0, // Default value. - SELF: 1, - BLANK: 2, - PARENT: 3, - TOP: 4, -}; -var LinkTargetStringMap = [ - '', - '_self', - '_blank', - '_parent', - '_top' -]; - -function isExternalLinkTargetSet() { - if (PDFJS.openExternalLinksInNewWindow) { - deprecated('PDFJS.openExternalLinksInNewWindow, please use ' + - '"PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK" instead.'); - if (PDFJS.externalLinkTarget === LinkTarget.NONE) { - PDFJS.externalLinkTarget = LinkTarget.BLANK; - } - // Reset the deprecated parameter, to suppress further warnings. - PDFJS.openExternalLinksInNewWindow = false; - } - switch (PDFJS.externalLinkTarget) { - case LinkTarget.NONE: - return false; - case LinkTarget.SELF: - case LinkTarget.BLANK: - case LinkTarget.PARENT: - case LinkTarget.TOP: - return true; - } - warn('PDFJS.externalLinkTarget is invalid: ' + PDFJS.externalLinkTarget); - // Reset the external link target, to suppress further warnings. - PDFJS.externalLinkTarget = LinkTarget.NONE; - return false; -} -PDFJS.isExternalLinkTargetSet = isExternalLinkTargetSet; - -var PasswordResponses = PDFJS.PasswordResponses = { - NEED_PASSWORD: 1, - INCORRECT_PASSWORD: 2 -}; - -var PasswordException = (function PasswordExceptionClosure() { - function PasswordException(msg, code) { - this.name = 'PasswordException'; - this.message = msg; - this.code = code; - } - - PasswordException.prototype = new Error(); - PasswordException.constructor = PasswordException; - - return PasswordException; -})(); -PDFJS.PasswordException = PasswordException; - -var UnknownErrorException = (function UnknownErrorExceptionClosure() { - function UnknownErrorException(msg, details) { - this.name = 'UnknownErrorException'; - this.message = msg; - this.details = details; - } - - UnknownErrorException.prototype = new Error(); - UnknownErrorException.constructor = UnknownErrorException; - - return UnknownErrorException; -})(); -PDFJS.UnknownErrorException = UnknownErrorException; - -var InvalidPDFException = (function InvalidPDFExceptionClosure() { - function InvalidPDFException(msg) { - this.name = 'InvalidPDFException'; - this.message = msg; - } - - InvalidPDFException.prototype = new Error(); - InvalidPDFException.constructor = InvalidPDFException; - - return InvalidPDFException; -})(); -PDFJS.InvalidPDFException = InvalidPDFException; - -var MissingPDFException = (function MissingPDFExceptionClosure() { - function MissingPDFException(msg) { - this.name = 'MissingPDFException'; - this.message = msg; - } - - MissingPDFException.prototype = new Error(); - MissingPDFException.constructor = MissingPDFException; - - return MissingPDFException; -})(); -PDFJS.MissingPDFException = MissingPDFException; - -var UnexpectedResponseException = - (function UnexpectedResponseExceptionClosure() { - function UnexpectedResponseException(msg, status) { - this.name = 'UnexpectedResponseException'; - this.message = msg; - this.status = status; - } - - UnexpectedResponseException.prototype = new Error(); - UnexpectedResponseException.constructor = UnexpectedResponseException; - - return UnexpectedResponseException; -})(); -PDFJS.UnexpectedResponseException = UnexpectedResponseException; - -var NotImplementedException = (function NotImplementedExceptionClosure() { - function NotImplementedException(msg) { - this.message = msg; - } - - NotImplementedException.prototype = new Error(); - NotImplementedException.prototype.name = 'NotImplementedException'; - NotImplementedException.constructor = NotImplementedException; - - return NotImplementedException; -})(); - -var MissingDataException = (function MissingDataExceptionClosure() { - function MissingDataException(begin, end) { - this.begin = begin; - this.end = end; - this.message = 'Missing data [' + begin + ', ' + end + ')'; - } - - MissingDataException.prototype = new Error(); - MissingDataException.prototype.name = 'MissingDataException'; - MissingDataException.constructor = MissingDataException; - - return MissingDataException; -})(); - -var XRefParseException = (function XRefParseExceptionClosure() { - function XRefParseException(msg) { - this.message = msg; - } - - XRefParseException.prototype = new Error(); - XRefParseException.prototype.name = 'XRefParseException'; - XRefParseException.constructor = XRefParseException; - - return XRefParseException; -})(); - - -function bytesToString(bytes) { - assert(bytes !== null && typeof bytes === 'object' && - bytes.length !== undefined, 'Invalid argument for bytesToString'); - var length = bytes.length; - var MAX_ARGUMENT_COUNT = 8192; - if (length < MAX_ARGUMENT_COUNT) { - return String.fromCharCode.apply(null, bytes); - } - var strBuf = []; - for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) { - var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length); - var chunk = bytes.subarray(i, chunkEnd); - strBuf.push(String.fromCharCode.apply(null, chunk)); - } - return strBuf.join(''); -} - -function stringToBytes(str) { - assert(typeof str === 'string', 'Invalid argument for stringToBytes'); - var length = str.length; - var bytes = new Uint8Array(length); - for (var i = 0; i < length; ++i) { - bytes[i] = str.charCodeAt(i) & 0xFF; - } - return bytes; -} - -function string32(value) { - return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff, - (value >> 8) & 0xff, value & 0xff); -} - -function log2(x) { - var n = 1, i = 0; - while (x > n) { - n <<= 1; - i++; - } - return i; -} - -function readInt8(data, start) { - return (data[start] << 24) >> 24; -} - -function readUint16(data, offset) { - return (data[offset] << 8) | data[offset + 1]; -} - -function readUint32(data, offset) { - return ((data[offset] << 24) | (data[offset + 1] << 16) | - (data[offset + 2] << 8) | data[offset + 3]) >>> 0; -} - -// Lazy test the endianness of the platform -// NOTE: This will be 'true' for simulated TypedArrays -function isLittleEndian() { - var buffer8 = new Uint8Array(2); - buffer8[0] = 1; - var buffer16 = new Uint16Array(buffer8.buffer); - return (buffer16[0] === 1); -} - -Object.defineProperty(PDFJS, 'isLittleEndian', { - configurable: true, - get: function PDFJS_isLittleEndian() { - return shadow(PDFJS, 'isLittleEndian', isLittleEndian()); - } -}); - - // Lazy test if the userAgent support CanvasTypedArrays -function hasCanvasTypedArrays() { - var canvas = document.createElement('canvas'); - canvas.width = canvas.height = 1; - var ctx = canvas.getContext('2d'); - var imageData = ctx.createImageData(1, 1); - return (typeof imageData.data.buffer !== 'undefined'); -} - -Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', { - configurable: true, - get: function PDFJS_hasCanvasTypedArrays() { - return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays()); - } -}); - -var Uint32ArrayView = (function Uint32ArrayViewClosure() { - - function Uint32ArrayView(buffer, length) { - this.buffer = buffer; - this.byteLength = buffer.length; - this.length = length === undefined ? (this.byteLength >> 2) : length; - ensureUint32ArrayViewProps(this.length); - } - Uint32ArrayView.prototype = Object.create(null); - - var uint32ArrayViewSetters = 0; - function createUint32ArrayProp(index) { - return { - get: function () { - var buffer = this.buffer, offset = index << 2; - return (buffer[offset] | (buffer[offset + 1] << 8) | - (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0; - }, - set: function (value) { - var buffer = this.buffer, offset = index << 2; - buffer[offset] = value & 255; - buffer[offset + 1] = (value >> 8) & 255; - buffer[offset + 2] = (value >> 16) & 255; - buffer[offset + 3] = (value >>> 24) & 255; - } - }; - } - - function ensureUint32ArrayViewProps(length) { - while (uint32ArrayViewSetters < length) { - Object.defineProperty(Uint32ArrayView.prototype, - uint32ArrayViewSetters, - createUint32ArrayProp(uint32ArrayViewSetters)); - uint32ArrayViewSetters++; - } - } - - return Uint32ArrayView; -})(); - -exports.Uint32ArrayView = Uint32ArrayView; - -var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0]; - -var Util = PDFJS.Util = (function UtilClosure() { - function Util() {} - - var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')']; - - // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids - // creating many intermediate strings. - Util.makeCssRgb = function Util_makeCssRgb(r, g, b) { - rgbBuf[1] = r; - rgbBuf[3] = g; - rgbBuf[5] = b; - return rgbBuf.join(''); - }; - - // Concatenates two transformation matrices together and returns the result. - Util.transform = function Util_transform(m1, m2) { - return [ - m1[0] * m2[0] + m1[2] * m2[1], - m1[1] * m2[0] + m1[3] * m2[1], - m1[0] * m2[2] + m1[2] * m2[3], - m1[1] * m2[2] + m1[3] * m2[3], - m1[0] * m2[4] + m1[2] * m2[5] + m1[4], - m1[1] * m2[4] + m1[3] * m2[5] + m1[5] - ]; - }; - - // For 2d affine transforms - Util.applyTransform = function Util_applyTransform(p, m) { - var xt = p[0] * m[0] + p[1] * m[2] + m[4]; - var yt = p[0] * m[1] + p[1] * m[3] + m[5]; - return [xt, yt]; - }; - - Util.applyInverseTransform = function Util_applyInverseTransform(p, m) { - var d = m[0] * m[3] - m[1] * m[2]; - var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d; - var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d; - return [xt, yt]; - }; - - // Applies the transform to the rectangle and finds the minimum axially - // aligned bounding box. - Util.getAxialAlignedBoundingBox = - function Util_getAxialAlignedBoundingBox(r, m) { - - var p1 = Util.applyTransform(r, m); - var p2 = Util.applyTransform(r.slice(2, 4), m); - var p3 = Util.applyTransform([r[0], r[3]], m); - var p4 = Util.applyTransform([r[2], r[1]], m); - return [ - Math.min(p1[0], p2[0], p3[0], p4[0]), - Math.min(p1[1], p2[1], p3[1], p4[1]), - Math.max(p1[0], p2[0], p3[0], p4[0]), - Math.max(p1[1], p2[1], p3[1], p4[1]) - ]; - }; - - Util.inverseTransform = function Util_inverseTransform(m) { - var d = m[0] * m[3] - m[1] * m[2]; - return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, - (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d]; - }; - - // Apply a generic 3d matrix M on a 3-vector v: - // | a b c | | X | - // | d e f | x | Y | - // | g h i | | Z | - // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i], - // with v as [X,Y,Z] - Util.apply3dTransform = function Util_apply3dTransform(m, v) { - return [ - m[0] * v[0] + m[1] * v[1] + m[2] * v[2], - m[3] * v[0] + m[4] * v[1] + m[5] * v[2], - m[6] * v[0] + m[7] * v[1] + m[8] * v[2] - ]; - }; - - // This calculation uses Singular Value Decomposition. - // The SVD can be represented with formula A = USV. We are interested in the - // matrix S here because it represents the scale values. - Util.singularValueDecompose2dScale = - function Util_singularValueDecompose2dScale(m) { - - var transpose = [m[0], m[2], m[1], m[3]]; - - // Multiply matrix m with its transpose. - var a = m[0] * transpose[0] + m[1] * transpose[2]; - var b = m[0] * transpose[1] + m[1] * transpose[3]; - var c = m[2] * transpose[0] + m[3] * transpose[2]; - var d = m[2] * transpose[1] + m[3] * transpose[3]; - - // Solve the second degree polynomial to get roots. - var first = (a + d) / 2; - var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2; - var sx = first + second || 1; - var sy = first - second || 1; - - // Scale values are the square roots of the eigenvalues. - return [Math.sqrt(sx), Math.sqrt(sy)]; - }; - - // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2) - // For coordinate systems whose origin lies in the bottom-left, this - // means normalization to (BL,TR) ordering. For systems with origin in the - // top-left, this means (TL,BR) ordering. - Util.normalizeRect = function Util_normalizeRect(rect) { - var r = rect.slice(0); // clone rect - if (rect[0] > rect[2]) { - r[0] = rect[2]; - r[2] = rect[0]; - } - if (rect[1] > rect[3]) { - r[1] = rect[3]; - r[3] = rect[1]; - } - return r; - }; - - // Returns a rectangle [x1, y1, x2, y2] corresponding to the - // intersection of rect1 and rect2. If no intersection, returns 'false' - // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2] - Util.intersect = function Util_intersect(rect1, rect2) { - function compare(a, b) { - return a - b; - } - - // Order points along the axes - var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare), - orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare), - result = []; - - rect1 = Util.normalizeRect(rect1); - rect2 = Util.normalizeRect(rect2); - - // X: first and second points belong to different rectangles? - if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) || - (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) { - // Intersection must be between second and third points - result[0] = orderedX[1]; - result[2] = orderedX[2]; - } else { - return false; - } - - // Y: first and second points belong to different rectangles? - if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) || - (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) { - // Intersection must be between second and third points - result[1] = orderedY[1]; - result[3] = orderedY[2]; - } else { - return false; - } - - return result; - }; - - Util.sign = function Util_sign(num) { - return num < 0 ? -1 : 1; - }; - - Util.appendToArray = function Util_appendToArray(arr1, arr2) { - Array.prototype.push.apply(arr1, arr2); - }; - - Util.prependToArray = function Util_prependToArray(arr1, arr2) { - Array.prototype.unshift.apply(arr1, arr2); - }; - - Util.extendObj = function extendObj(obj1, obj2) { - for (var key in obj2) { - obj1[key] = obj2[key]; - } - }; - - Util.getInheritableProperty = function Util_getInheritableProperty(dict, - name) { - while (dict && !dict.has(name)) { - dict = dict.get('Parent'); - } - if (!dict) { - return null; - } - return dict.get(name); - }; - - Util.inherit = function Util_inherit(sub, base, prototype) { - sub.prototype = Object.create(base.prototype); - sub.prototype.constructor = sub; - for (var prop in prototype) { - sub.prototype[prop] = prototype[prop]; - } - }; - - Util.loadScript = function Util_loadScript(src, callback) { - var script = document.createElement('script'); - var loaded = false; - script.setAttribute('src', src); - if (callback) { - script.onload = function() { - if (!loaded) { - callback(); - } - loaded = true; - }; - } - document.getElementsByTagName('head')[0].appendChild(script); - }; - - return Util; -})(); - -/** - * PDF page viewport created based on scale, rotation and offset. - * @class - * @alias PDFJS.PageViewport - */ -var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() { - /** - * @constructor - * @private - * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates. - * @param scale {number} scale of the viewport. - * @param rotation {number} rotations of the viewport in degrees. - * @param offsetX {number} offset X - * @param offsetY {number} offset Y - * @param dontFlip {boolean} if true, axis Y will not be flipped. - */ - function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) { - this.viewBox = viewBox; - this.scale = scale; - this.rotation = rotation; - this.offsetX = offsetX; - this.offsetY = offsetY; - - // creating transform to convert pdf coordinate system to the normal - // canvas like coordinates taking in account scale and rotation - var centerX = (viewBox[2] + viewBox[0]) / 2; - var centerY = (viewBox[3] + viewBox[1]) / 2; - var rotateA, rotateB, rotateC, rotateD; - rotation = rotation % 360; - rotation = rotation < 0 ? rotation + 360 : rotation; - switch (rotation) { - case 180: - rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1; - break; - case 90: - rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0; - break; - case 270: - rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0; - break; - //case 0: - default: - rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1; - break; - } - - if (dontFlip) { - rotateC = -rotateC; rotateD = -rotateD; - } - - var offsetCanvasX, offsetCanvasY; - var width, height; - if (rotateA === 0) { - offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX; - offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY; - width = Math.abs(viewBox[3] - viewBox[1]) * scale; - height = Math.abs(viewBox[2] - viewBox[0]) * scale; - } else { - offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX; - offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY; - width = Math.abs(viewBox[2] - viewBox[0]) * scale; - height = Math.abs(viewBox[3] - viewBox[1]) * scale; - } - // creating transform for the following operations: - // translate(-centerX, -centerY), rotate and flip vertically, - // scale, and translate(offsetCanvasX, offsetCanvasY) - this.transform = [ - rotateA * scale, - rotateB * scale, - rotateC * scale, - rotateD * scale, - offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, - offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY - ]; - - this.width = width; - this.height = height; - this.fontScale = scale; - } - PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ { - /** - * Clones viewport with additional properties. - * @param args {Object} (optional) If specified, may contain the 'scale' or - * 'rotation' properties to override the corresponding properties in - * the cloned viewport. - * @returns {PDFJS.PageViewport} Cloned viewport. - */ - clone: function PageViewPort_clone(args) { - args = args || {}; - var scale = 'scale' in args ? args.scale : this.scale; - var rotation = 'rotation' in args ? args.rotation : this.rotation; - return new PageViewport(this.viewBox.slice(), scale, rotation, - this.offsetX, this.offsetY, args.dontFlip); - }, - /** - * Converts PDF point to the viewport coordinates. For examples, useful for - * converting PDF location into canvas pixel coordinates. - * @param x {number} X coordinate. - * @param y {number} Y coordinate. - * @returns {Object} Object that contains 'x' and 'y' properties of the - * point in the viewport coordinate space. - * @see {@link convertToPdfPoint} - * @see {@link convertToViewportRectangle} - */ - convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) { - return Util.applyTransform([x, y], this.transform); - }, - /** - * Converts PDF rectangle to the viewport coordinates. - * @param rect {Array} xMin, yMin, xMax and yMax coordinates. - * @returns {Array} Contains corresponding coordinates of the rectangle - * in the viewport coordinate space. - * @see {@link convertToViewportPoint} - */ - convertToViewportRectangle: - function PageViewport_convertToViewportRectangle(rect) { - var tl = Util.applyTransform([rect[0], rect[1]], this.transform); - var br = Util.applyTransform([rect[2], rect[3]], this.transform); - return [tl[0], tl[1], br[0], br[1]]; - }, - /** - * Converts viewport coordinates to the PDF location. For examples, useful - * for converting canvas pixel location into PDF one. - * @param x {number} X coordinate. - * @param y {number} Y coordinate. - * @returns {Object} Object that contains 'x' and 'y' properties of the - * point in the PDF coordinate space. - * @see {@link convertToViewportPoint} - */ - convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) { - return Util.applyInverseTransform([x, y], this.transform); - } - }; - return PageViewport; -})(); - -var PDFStringTranslateTable = [ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, - 0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C, - 0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160, - 0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC -]; - -function stringToPDFString(str) { - var i, n = str.length, strBuf = []; - if (str[0] === '\xFE' && str[1] === '\xFF') { - // UTF16BE BOM - for (i = 2; i < n; i += 2) { - strBuf.push(String.fromCharCode( - (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))); - } - } else { - for (i = 0; i < n; ++i) { - var code = PDFStringTranslateTable[str.charCodeAt(i)]; - strBuf.push(code ? String.fromCharCode(code) : str.charAt(i)); - } - } - return strBuf.join(''); -} - -function stringToUTF8String(str) { - return decodeURIComponent(escape(str)); -} - -function utf8StringToString(str) { - return unescape(encodeURIComponent(str)); -} - -function isEmptyObj(obj) { - for (var key in obj) { - return false; - } - return true; -} - -function isBool(v) { - return typeof v === 'boolean'; -} - -function isInt(v) { - return typeof v === 'number' && ((v | 0) === v); -} - -function isNum(v) { - return typeof v === 'number'; -} - -function isString(v) { - return typeof v === 'string'; -} - -function isArray(v) { - return v instanceof Array; -} - -function isArrayBuffer(v) { - return typeof v === 'object' && v !== null && v.byteLength !== undefined; -} - -/** - * Promise Capability object. - * - * @typedef {Object} PromiseCapability - * @property {Promise} promise - A promise object. - * @property {function} resolve - Fullfills the promise. - * @property {function} reject - Rejects the promise. - */ - -/** - * Creates a promise capability object. - * @alias PDFJS.createPromiseCapability - * - * @return {PromiseCapability} A capability object contains: - * - a Promise, resolve and reject methods. - */ -function createPromiseCapability() { - var capability = {}; - capability.promise = new Promise(function (resolve, reject) { - capability.resolve = resolve; - capability.reject = reject; - }); - return capability; -} - -PDFJS.createPromiseCapability = createPromiseCapability; - -/** - * Polyfill for Promises: - * The following promise implementation tries to generally implement the - * Promise/A+ spec. Some notable differences from other promise libaries are: - * - There currently isn't a seperate deferred and promise object. - * - Unhandled rejections eventually show an error if they aren't handled. - * - * Based off of the work in: - * https://bugzilla.mozilla.org/show_bug.cgi?id=810490 - */ -(function PromiseClosure() { - if (globalScope.Promise) { - // Promises existing in the DOM/Worker, checking presence of all/resolve - if (typeof globalScope.Promise.all !== 'function') { - globalScope.Promise.all = function (iterable) { - var count = 0, results = [], resolve, reject; - var promise = new globalScope.Promise(function (resolve_, reject_) { - resolve = resolve_; - reject = reject_; - }); - iterable.forEach(function (p, i) { - count++; - p.then(function (result) { - results[i] = result; - count--; - if (count === 0) { - resolve(results); - } - }, reject); - }); - if (count === 0) { - resolve(results); - } - return promise; - }; - } - if (typeof globalScope.Promise.resolve !== 'function') { - globalScope.Promise.resolve = function (value) { - return new globalScope.Promise(function (resolve) { resolve(value); }); - }; - } - if (typeof globalScope.Promise.reject !== 'function') { - globalScope.Promise.reject = function (reason) { - return new globalScope.Promise(function (resolve, reject) { - reject(reason); - }); - }; - } - if (typeof globalScope.Promise.prototype.catch !== 'function') { - globalScope.Promise.prototype.catch = function (onReject) { - return globalScope.Promise.prototype.then(undefined, onReject); - }; - } - return; - } - var STATUS_PENDING = 0; - var STATUS_RESOLVED = 1; - var STATUS_REJECTED = 2; - - // In an attempt to avoid silent exceptions, unhandled rejections are - // tracked and if they aren't handled in a certain amount of time an - // error is logged. - var REJECTION_TIMEOUT = 500; - - var HandlerManager = { - handlers: [], - running: false, - unhandledRejections: [], - pendingRejectionCheck: false, - - scheduleHandlers: function scheduleHandlers(promise) { - if (promise._status === STATUS_PENDING) { - return; - } - - this.handlers = this.handlers.concat(promise._handlers); - promise._handlers = []; - - if (this.running) { - return; - } - this.running = true; - - setTimeout(this.runHandlers.bind(this), 0); - }, - - runHandlers: function runHandlers() { - var RUN_TIMEOUT = 1; // ms - var timeoutAt = Date.now() + RUN_TIMEOUT; - while (this.handlers.length > 0) { - var handler = this.handlers.shift(); - - var nextStatus = handler.thisPromise._status; - var nextValue = handler.thisPromise._value; - - try { - if (nextStatus === STATUS_RESOLVED) { - if (typeof handler.onResolve === 'function') { - nextValue = handler.onResolve(nextValue); - } - } else if (typeof handler.onReject === 'function') { - nextValue = handler.onReject(nextValue); - nextStatus = STATUS_RESOLVED; - - if (handler.thisPromise._unhandledRejection) { - this.removeUnhandeledRejection(handler.thisPromise); - } - } - } catch (ex) { - nextStatus = STATUS_REJECTED; - nextValue = ex; - } - - handler.nextPromise._updateStatus(nextStatus, nextValue); - if (Date.now() >= timeoutAt) { - break; - } - } - - if (this.handlers.length > 0) { - setTimeout(this.runHandlers.bind(this), 0); - return; - } - - this.running = false; - }, - - addUnhandledRejection: function addUnhandledRejection(promise) { - this.unhandledRejections.push({ - promise: promise, - time: Date.now() - }); - this.scheduleRejectionCheck(); - }, - - removeUnhandeledRejection: function removeUnhandeledRejection(promise) { - promise._unhandledRejection = false; - for (var i = 0; i < this.unhandledRejections.length; i++) { - if (this.unhandledRejections[i].promise === promise) { - this.unhandledRejections.splice(i); - i--; - } - } - }, - - scheduleRejectionCheck: function scheduleRejectionCheck() { - if (this.pendingRejectionCheck) { - return; - } - this.pendingRejectionCheck = true; - setTimeout(function rejectionCheck() { - this.pendingRejectionCheck = false; - var now = Date.now(); - for (var i = 0; i < this.unhandledRejections.length; i++) { - if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) { - var unhandled = this.unhandledRejections[i].promise._value; - var msg = 'Unhandled rejection: ' + unhandled; - if (unhandled.stack) { - msg += '\n' + unhandled.stack; - } - warn(msg); - this.unhandledRejections.splice(i); - i--; - } - } - if (this.unhandledRejections.length) { - this.scheduleRejectionCheck(); - } - }.bind(this), REJECTION_TIMEOUT); - } - }; - - function Promise(resolver) { - this._status = STATUS_PENDING; - this._handlers = []; - try { - resolver.call(this, this._resolve.bind(this), this._reject.bind(this)); - } catch (e) { - this._reject(e); - } - } - /** - * Builds a promise that is resolved when all the passed in promises are - * resolved. - * @param {array} array of data and/or promises to wait for. - * @return {Promise} New dependant promise. - */ - Promise.all = function Promise_all(promises) { - var resolveAll, rejectAll; - var deferred = new Promise(function (resolve, reject) { - resolveAll = resolve; - rejectAll = reject; - }); - var unresolved = promises.length; - var results = []; - if (unresolved === 0) { - resolveAll(results); - return deferred; - } - function reject(reason) { - if (deferred._status === STATUS_REJECTED) { - return; - } - results = []; - rejectAll(reason); - } - for (var i = 0, ii = promises.length; i < ii; ++i) { - var promise = promises[i]; - var resolve = (function(i) { - return function(value) { - if (deferred._status === STATUS_REJECTED) { - return; - } - results[i] = value; - unresolved--; - if (unresolved === 0) { - resolveAll(results); - } - }; - })(i); - if (Promise.isPromise(promise)) { - promise.then(resolve, reject); - } else { - resolve(promise); - } - } - return deferred; - }; - - /** - * Checks if the value is likely a promise (has a 'then' function). - * @return {boolean} true if value is thenable - */ - Promise.isPromise = function Promise_isPromise(value) { - return value && typeof value.then === 'function'; - }; - - /** - * Creates resolved promise - * @param value resolve value - * @returns {Promise} - */ - Promise.resolve = function Promise_resolve(value) { - return new Promise(function (resolve) { resolve(value); }); - }; - - /** - * Creates rejected promise - * @param reason rejection value - * @returns {Promise} - */ - Promise.reject = function Promise_reject(reason) { - return new Promise(function (resolve, reject) { reject(reason); }); - }; - - Promise.prototype = { - _status: null, - _value: null, - _handlers: null, - _unhandledRejection: null, - - _updateStatus: function Promise__updateStatus(status, value) { - if (this._status === STATUS_RESOLVED || - this._status === STATUS_REJECTED) { - return; - } - - if (status === STATUS_RESOLVED && - Promise.isPromise(value)) { - value.then(this._updateStatus.bind(this, STATUS_RESOLVED), - this._updateStatus.bind(this, STATUS_REJECTED)); - return; - } - - this._status = status; - this._value = value; - - if (status === STATUS_REJECTED && this._handlers.length === 0) { - this._unhandledRejection = true; - HandlerManager.addUnhandledRejection(this); - } - - HandlerManager.scheduleHandlers(this); - }, - - _resolve: function Promise_resolve(value) { - this._updateStatus(STATUS_RESOLVED, value); - }, - - _reject: function Promise_reject(reason) { - this._updateStatus(STATUS_REJECTED, reason); - }, - - then: function Promise_then(onResolve, onReject) { - var nextPromise = new Promise(function (resolve, reject) { - this.resolve = resolve; - this.reject = reject; - }); - this._handlers.push({ - thisPromise: this, - onResolve: onResolve, - onReject: onReject, - nextPromise: nextPromise - }); - HandlerManager.scheduleHandlers(this); - return nextPromise; - }, - - catch: function Promise_catch(onReject) { - return this.then(undefined, onReject); - } - }; - - globalScope.Promise = Promise; -})(); - -var StatTimer = (function StatTimerClosure() { - function rpad(str, pad, length) { - while (str.length < length) { - str += pad; - } - return str; - } - function StatTimer() { - this.started = {}; - this.times = []; - this.enabled = true; - } - StatTimer.prototype = { - time: function StatTimer_time(name) { - if (!this.enabled) { - return; - } - if (name in this.started) { - warn('Timer is already running for ' + name); - } - this.started[name] = Date.now(); - }, - timeEnd: function StatTimer_timeEnd(name) { - if (!this.enabled) { - return; - } - if (!(name in this.started)) { - warn('Timer has not been started for ' + name); - } - this.times.push({ - 'name': name, - 'start': this.started[name], - 'end': Date.now() - }); - // Remove timer from started so it can be called again. - delete this.started[name]; - }, - toString: function StatTimer_toString() { - var i, ii; - var times = this.times; - var out = ''; - // Find the longest name for padding purposes. - var longest = 0; - for (i = 0, ii = times.length; i < ii; ++i) { - var name = times[i]['name']; - if (name.length > longest) { - longest = name.length; - } - } - for (i = 0, ii = times.length; i < ii; ++i) { - var span = times[i]; - var duration = span.end - span.start; - out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n'; - } - return out; - } - }; - return StatTimer; -})(); - -PDFJS.createBlob = function createBlob(data, contentType) { - if (typeof Blob !== 'undefined') { - return new Blob([data], { type: contentType }); - } - // Blob builder is deprecated in FF14 and removed in FF18. - var bb = new MozBlobBuilder(); - bb.append(data); - return bb.getBlob(contentType); -}; - -PDFJS.createObjectURL = (function createObjectURLClosure() { - // Blob/createObjectURL is not available, falling back to data schema. - var digits = - 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; - - return function createObjectURL(data, contentType) { - if (!PDFJS.disableCreateObjectURL && - typeof URL !== 'undefined' && URL.createObjectURL) { - var blob = PDFJS.createBlob(data, contentType); - return URL.createObjectURL(blob); - } - - var buffer = 'data:' + contentType + ';base64,'; - for (var i = 0, ii = data.length; i < ii; i += 3) { - var b1 = data[i] & 0xFF; - var b2 = data[i + 1] & 0xFF; - var b3 = data[i + 2] & 0xFF; - var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4); - var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64; - var d4 = i + 2 < ii ? (b3 & 0x3F) : 64; - buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4]; - } - return buffer; - }; -})(); - -function MessageHandler(sourceName, targetName, comObj) { - this.sourceName = sourceName; - this.targetName = targetName; - this.comObj = comObj; - this.callbackIndex = 1; - this.postMessageTransfers = true; - var callbacksCapabilities = this.callbacksCapabilities = {}; - var ah = this.actionHandler = {}; - - this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) { - var data = event.data; - if (data.targetName !== this.sourceName) { - return; - } - if (data.isReply) { - var callbackId = data.callbackId; - if (data.callbackId in callbacksCapabilities) { - var callback = callbacksCapabilities[callbackId]; - delete callbacksCapabilities[callbackId]; - if ('error' in data) { - callback.reject(data.error); - } else { - callback.resolve(data.data); - } - } else { - error('Cannot resolve callback ' + callbackId); - } - } else if (data.action in ah) { - var action = ah[data.action]; - if (data.callbackId) { - var sourceName = this.sourceName; - var targetName = data.sourceName; - Promise.resolve().then(function () { - return action[0].call(action[1], data.data); - }).then(function (result) { - comObj.postMessage({ - sourceName: sourceName, - targetName: targetName, - isReply: true, - callbackId: data.callbackId, - data: result - }); - }, function (reason) { - if (reason instanceof Error) { - // Serialize error to avoid "DataCloneError" - reason = reason + ''; - } - comObj.postMessage({ - sourceName: sourceName, - targetName: targetName, - isReply: true, - callbackId: data.callbackId, - error: reason - }); - }); - } else { - action[0].call(action[1], data.data); - } - } else { - error('Unknown action from worker: ' + data.action); - } - }.bind(this); - comObj.addEventListener('message', this._onComObjOnMessage); -} - -MessageHandler.prototype = { - on: function messageHandlerOn(actionName, handler, scope) { - var ah = this.actionHandler; - if (ah[actionName]) { - error('There is already an actionName called "' + actionName + '"'); - } - ah[actionName] = [handler, scope]; - }, - /** - * Sends a message to the comObj to invoke the action with the supplied data. - * @param {String} actionName Action to call. - * @param {JSON} data JSON data to send. - * @param {Array} [transfers] Optional list of transfers/ArrayBuffers - */ - send: function messageHandlerSend(actionName, data, transfers) { - var message = { - sourceName: this.sourceName, - targetName: this.targetName, - action: actionName, - data: data - }; - this.postMessage(message, transfers); - }, - /** - * Sends a message to the comObj to invoke the action with the supplied data. - * Expects that other side will callback with the response. - * @param {String} actionName Action to call. - * @param {JSON} data JSON data to send. - * @param {Array} [transfers] Optional list of transfers/ArrayBuffers. - * @returns {Promise} Promise to be resolved with response data. - */ - sendWithPromise: - function messageHandlerSendWithPromise(actionName, data, transfers) { - var callbackId = this.callbackIndex++; - var message = { - sourceName: this.sourceName, - targetName: this.targetName, - action: actionName, - data: data, - callbackId: callbackId - }; - var capability = createPromiseCapability(); - this.callbacksCapabilities[callbackId] = capability; - try { - this.postMessage(message, transfers); - } catch (e) { - capability.reject(e); - } - return capability.promise; - }, - /** - * Sends raw message to the comObj. - * @private - * @param message {Object} Raw message. - * @param transfers List of transfers/ArrayBuffers, or undefined. - */ - postMessage: function (message, transfers) { - if (transfers && this.postMessageTransfers) { - this.comObj.postMessage(message, transfers); - } else { - this.comObj.postMessage(message); - } - }, - - destroy: function () { - this.comObj.removeEventListener('message', this._onComObjOnMessage); - } -}; - -function loadJpegStream(id, imageUrl, objs) { - var img = new Image(); - img.onload = (function loadJpegStream_onloadClosure() { - objs.resolve(id, img); - }); - img.onerror = (function loadJpegStream_onerrorClosure() { - objs.resolve(id, null); - warn('Error during JPEG image loading'); - }); - img.src = imageUrl; -} - -exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX; -exports.IDENTITY_MATRIX = IDENTITY_MATRIX; -exports.OPS = OPS; -exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES; -exports.AnnotationBorderStyleType = AnnotationBorderStyleType; -exports.AnnotationFlag = AnnotationFlag; -exports.AnnotationType = AnnotationType; -exports.FontType = FontType; -exports.ImageKind = ImageKind; -exports.InvalidPDFException = InvalidPDFException; -exports.LinkTarget = LinkTarget; -exports.LinkTargetStringMap = LinkTargetStringMap; -exports.MessageHandler = MessageHandler; -exports.MissingDataException = MissingDataException; -exports.MissingPDFException = MissingPDFException; -exports.NotImplementedException = NotImplementedException; -exports.PasswordException = PasswordException; -exports.PasswordResponses = PasswordResponses; -exports.StatTimer = StatTimer; -exports.StreamType = StreamType; -exports.TextRenderingMode = TextRenderingMode; -exports.UnexpectedResponseException = UnexpectedResponseException; -exports.UnknownErrorException = UnknownErrorException; -exports.Util = Util; -exports.XRefParseException = XRefParseException; -exports.assert = assert; -exports.bytesToString = bytesToString; -exports.combineUrl = combineUrl; -exports.createPromiseCapability = createPromiseCapability; -exports.deprecated = deprecated; -exports.error = error; -exports.info = info; -exports.isArray = isArray; -exports.isArrayBuffer = isArrayBuffer; -exports.isBool = isBool; -exports.isEmptyObj = isEmptyObj; -exports.isExternalLinkTargetSet = isExternalLinkTargetSet; -exports.isInt = isInt; -exports.isNum = isNum; -exports.isString = isString; -exports.isValidUrl = isValidUrl; -exports.loadJpegStream = loadJpegStream; -exports.log2 = log2; -exports.readInt8 = readInt8; -exports.readUint16 = readUint16; -exports.readUint32 = readUint32; -exports.shadow = shadow; -exports.string32 = string32; -exports.stringToBytes = stringToBytes; -exports.stringToPDFString = stringToPDFString; -exports.stringToUTF8String = stringToUTF8String; -exports.utf8StringToString = utf8StringToString; -exports.warn = warn; -})); - - - - -var NetworkManager = (function NetworkManagerClosure() { - - var OK_RESPONSE = 200; - var PARTIAL_CONTENT_RESPONSE = 206; - - function NetworkManager(url, args) { - this.url = url; - args = args || {}; - this.isHttp = /^https?:/i.test(url); - this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; - this.withCredentials = args.withCredentials || false; - this.getXhr = args.getXhr || - function NetworkManager_getXhr() { - return new XMLHttpRequest(); - }; - - this.currXhrId = 0; - this.pendingRequests = {}; - this.loadedRequests = {}; - } - - function getArrayBuffer(xhr) { - var data = xhr.response; - if (typeof data !== 'string') { - return data; - } - var length = data.length; - var array = new Uint8Array(length); - for (var i = 0; i < length; i++) { - array[i] = data.charCodeAt(i) & 0xFF; - } - return array.buffer; - } - - var supportsMozChunked = (function supportsMozChunkedClosure() { - try { - var x = new XMLHttpRequest(); - // Firefox 37- required .open() to be called before setting responseType. - // https://bugzilla.mozilla.org/show_bug.cgi?id=707484 - // Even though the URL is not visited, .open() could fail if the URL is - // blocked, e.g. via the connect-src CSP directive or the NoScript addon. - // When this error occurs, this feature detection method will mistakenly - // report that moz-chunked-arraybuffer is not supported in Firefox 37-. - x.open('GET', 'https://example.com'); - x.responseType = 'moz-chunked-arraybuffer'; - return x.responseType === 'moz-chunked-arraybuffer'; - } catch (e) { - return false; - } - })(); - - NetworkManager.prototype = { - requestRange: function NetworkManager_requestRange(begin, end, listeners) { - var args = { - begin: begin, - end: end - }; - for (var prop in listeners) { - args[prop] = listeners[prop]; - } - return this.request(args); - }, - - requestFull: function NetworkManager_requestFull(listeners) { - return this.request(listeners); - }, - - request: function NetworkManager_request(args) { - var xhr = this.getXhr(); - var xhrId = this.currXhrId++; - var pendingRequest = this.pendingRequests[xhrId] = { - xhr: xhr - }; - - xhr.open('GET', this.url); - xhr.withCredentials = this.withCredentials; - for (var property in this.httpHeaders) { - var value = this.httpHeaders[property]; - if (typeof value === 'undefined') { - continue; - } - xhr.setRequestHeader(property, value); - } - if (this.isHttp && 'begin' in args && 'end' in args) { - var rangeStr = args.begin + '-' + (args.end - 1); - xhr.setRequestHeader('Range', 'bytes=' + rangeStr); - pendingRequest.expectedStatus = 206; - } else { - pendingRequest.expectedStatus = 200; - } - - var useMozChunkedLoading = supportsMozChunked && !!args.onProgressiveData; - if (useMozChunkedLoading) { - xhr.responseType = 'moz-chunked-arraybuffer'; - pendingRequest.onProgressiveData = args.onProgressiveData; - pendingRequest.mozChunked = true; - } else { - xhr.responseType = 'arraybuffer'; - } - - if (args.onError) { - xhr.onerror = function(evt) { - args.onError(xhr.status); - }; - } - xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); - xhr.onprogress = this.onProgress.bind(this, xhrId); - - pendingRequest.onHeadersReceived = args.onHeadersReceived; - pendingRequest.onDone = args.onDone; - pendingRequest.onError = args.onError; - pendingRequest.onProgress = args.onProgress; - - xhr.send(null); - - return xhrId; - }, - - onProgress: function NetworkManager_onProgress(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } - - if (pendingRequest.mozChunked) { - var chunk = getArrayBuffer(pendingRequest.xhr); - pendingRequest.onProgressiveData(chunk); - } - - var onProgress = pendingRequest.onProgress; - if (onProgress) { - onProgress(evt); - } - }, - - onStateChange: function NetworkManager_onStateChange(xhrId, evt) { - var pendingRequest = this.pendingRequests[xhrId]; - if (!pendingRequest) { - // Maybe abortRequest was called... - return; - } - - var xhr = pendingRequest.xhr; - if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { - pendingRequest.onHeadersReceived(); - delete pendingRequest.onHeadersReceived; - } - - if (xhr.readyState !== 4) { - return; - } - - if (!(xhrId in this.pendingRequests)) { - // The XHR request might have been aborted in onHeadersReceived() - // callback, in which case we should abort request - return; - } - - delete this.pendingRequests[xhrId]; - - // success status == 0 can be on ftp, file and other protocols - if (xhr.status === 0 && this.isHttp) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - var xhrStatus = xhr.status || OK_RESPONSE; - - // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: - // "A server MAY ignore the Range header". This means it's possible to - // get a 200 rather than a 206 response from a range request. - var ok_response_on_range_request = - xhrStatus === OK_RESPONSE && - pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; - - if (!ok_response_on_range_request && - xhrStatus !== pendingRequest.expectedStatus) { - if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - return; - } - - this.loadedRequests[xhrId] = true; - - var chunk = getArrayBuffer(xhr); - if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { - var rangeHeader = xhr.getResponseHeader('Content-Range'); - var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); - var begin = parseInt(matches[1], 10); - pendingRequest.onDone({ - begin: begin, - chunk: chunk - }); - } else if (pendingRequest.onProgressiveData) { - pendingRequest.onDone(null); - } else if (chunk) { - pendingRequest.onDone({ - begin: 0, - chunk: chunk - }); - } else if (pendingRequest.onError) { - pendingRequest.onError(xhr.status); - } - }, - - hasPendingRequests: function NetworkManager_hasPendingRequests() { - for (var xhrId in this.pendingRequests) { - return true; - } - return false; - }, - - getRequestXhr: function NetworkManager_getXhr(xhrId) { - return this.pendingRequests[xhrId].xhr; - }, - - isStreamingRequest: function NetworkManager_isStreamingRequest(xhrId) { - return !!(this.pendingRequests[xhrId].onProgressiveData); - }, - - isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { - return xhrId in this.pendingRequests; - }, - - isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { - return xhrId in this.loadedRequests; - }, - - abortAllRequests: function NetworkManager_abortAllRequests() { - for (var xhrId in this.pendingRequests) { - this.abortRequest(xhrId | 0); - } - }, - - abortRequest: function NetworkManager_abortRequest(xhrId) { - var xhr = this.pendingRequests[xhrId].xhr; - delete this.pendingRequests[xhrId]; - xhr.abort(); - } - }; - - return NetworkManager; -})(); - - -(function (root, factory) { - { - factory((root.pdfjsCoreArithmeticDecoder = {})); - } -}(this, function (exports) { - -/* This class implements the QM Coder decoding as defined in - * JPEG 2000 Part I Final Committee Draft Version 1.0 - * Annex C.3 Arithmetic decoding procedure - * available at http://www.jpeg.org/public/fcd15444-1.pdf - * - * The arithmetic decoder is used in conjunction with context models to decode - * JPEG2000 and JBIG2 streams. - */ -var ArithmeticDecoder = (function ArithmeticDecoderClosure() { - // Table C-2 - var QeTable = [ - {qe: 0x5601, nmps: 1, nlps: 1, switchFlag: 1}, - {qe: 0x3401, nmps: 2, nlps: 6, switchFlag: 0}, - {qe: 0x1801, nmps: 3, nlps: 9, switchFlag: 0}, - {qe: 0x0AC1, nmps: 4, nlps: 12, switchFlag: 0}, - {qe: 0x0521, nmps: 5, nlps: 29, switchFlag: 0}, - {qe: 0x0221, nmps: 38, nlps: 33, switchFlag: 0}, - {qe: 0x5601, nmps: 7, nlps: 6, switchFlag: 1}, - {qe: 0x5401, nmps: 8, nlps: 14, switchFlag: 0}, - {qe: 0x4801, nmps: 9, nlps: 14, switchFlag: 0}, - {qe: 0x3801, nmps: 10, nlps: 14, switchFlag: 0}, - {qe: 0x3001, nmps: 11, nlps: 17, switchFlag: 0}, - {qe: 0x2401, nmps: 12, nlps: 18, switchFlag: 0}, - {qe: 0x1C01, nmps: 13, nlps: 20, switchFlag: 0}, - {qe: 0x1601, nmps: 29, nlps: 21, switchFlag: 0}, - {qe: 0x5601, nmps: 15, nlps: 14, switchFlag: 1}, - {qe: 0x5401, nmps: 16, nlps: 14, switchFlag: 0}, - {qe: 0x5101, nmps: 17, nlps: 15, switchFlag: 0}, - {qe: 0x4801, nmps: 18, nlps: 16, switchFlag: 0}, - {qe: 0x3801, nmps: 19, nlps: 17, switchFlag: 0}, - {qe: 0x3401, nmps: 20, nlps: 18, switchFlag: 0}, - {qe: 0x3001, nmps: 21, nlps: 19, switchFlag: 0}, - {qe: 0x2801, nmps: 22, nlps: 19, switchFlag: 0}, - {qe: 0x2401, nmps: 23, nlps: 20, switchFlag: 0}, - {qe: 0x2201, nmps: 24, nlps: 21, switchFlag: 0}, - {qe: 0x1C01, nmps: 25, nlps: 22, switchFlag: 0}, - {qe: 0x1801, nmps: 26, nlps: 23, switchFlag: 0}, - {qe: 0x1601, nmps: 27, nlps: 24, switchFlag: 0}, - {qe: 0x1401, nmps: 28, nlps: 25, switchFlag: 0}, - {qe: 0x1201, nmps: 29, nlps: 26, switchFlag: 0}, - {qe: 0x1101, nmps: 30, nlps: 27, switchFlag: 0}, - {qe: 0x0AC1, nmps: 31, nlps: 28, switchFlag: 0}, - {qe: 0x09C1, nmps: 32, nlps: 29, switchFlag: 0}, - {qe: 0x08A1, nmps: 33, nlps: 30, switchFlag: 0}, - {qe: 0x0521, nmps: 34, nlps: 31, switchFlag: 0}, - {qe: 0x0441, nmps: 35, nlps: 32, switchFlag: 0}, - {qe: 0x02A1, nmps: 36, nlps: 33, switchFlag: 0}, - {qe: 0x0221, nmps: 37, nlps: 34, switchFlag: 0}, - {qe: 0x0141, nmps: 38, nlps: 35, switchFlag: 0}, - {qe: 0x0111, nmps: 39, nlps: 36, switchFlag: 0}, - {qe: 0x0085, nmps: 40, nlps: 37, switchFlag: 0}, - {qe: 0x0049, nmps: 41, nlps: 38, switchFlag: 0}, - {qe: 0x0025, nmps: 42, nlps: 39, switchFlag: 0}, - {qe: 0x0015, nmps: 43, nlps: 40, switchFlag: 0}, - {qe: 0x0009, nmps: 44, nlps: 41, switchFlag: 0}, - {qe: 0x0005, nmps: 45, nlps: 42, switchFlag: 0}, - {qe: 0x0001, nmps: 45, nlps: 43, switchFlag: 0}, - {qe: 0x5601, nmps: 46, nlps: 46, switchFlag: 0} - ]; - - // C.3.5 Initialisation of the decoder (INITDEC) - function ArithmeticDecoder(data, start, end) { - this.data = data; - this.bp = start; - this.dataEnd = end; - - this.chigh = data[start]; - this.clow = 0; - - this.byteIn(); - - this.chigh = ((this.chigh << 7) & 0xFFFF) | ((this.clow >> 9) & 0x7F); - this.clow = (this.clow << 7) & 0xFFFF; - this.ct -= 7; - this.a = 0x8000; - } - - ArithmeticDecoder.prototype = { - // C.3.4 Compressed data input (BYTEIN) - byteIn: function ArithmeticDecoder_byteIn() { - var data = this.data; - var bp = this.bp; - if (data[bp] === 0xFF) { - var b1 = data[bp + 1]; - if (b1 > 0x8F) { - this.clow += 0xFF00; - this.ct = 8; - } else { - bp++; - this.clow += (data[bp] << 9); - this.ct = 7; - this.bp = bp; - } - } else { - bp++; - this.clow += bp < this.dataEnd ? (data[bp] << 8) : 0xFF00; - this.ct = 8; - this.bp = bp; - } - if (this.clow > 0xFFFF) { - this.chigh += (this.clow >> 16); - this.clow &= 0xFFFF; - } - }, - // C.3.2 Decoding a decision (DECODE) - readBit: function ArithmeticDecoder_readBit(contexts, pos) { - // contexts are packed into 1 byte: - // highest 7 bits carry cx.index, lowest bit carries cx.mps - var cx_index = contexts[pos] >> 1, cx_mps = contexts[pos] & 1; - var qeTableIcx = QeTable[cx_index]; - var qeIcx = qeTableIcx.qe; - var d; - var a = this.a - qeIcx; - - if (this.chigh < qeIcx) { - // exchangeLps - if (a < qeIcx) { - a = qeIcx; - d = cx_mps; - cx_index = qeTableIcx.nmps; - } else { - a = qeIcx; - d = 1 ^ cx_mps; - if (qeTableIcx.switchFlag === 1) { - cx_mps = d; - } - cx_index = qeTableIcx.nlps; - } - } else { - this.chigh -= qeIcx; - if ((a & 0x8000) !== 0) { - this.a = a; - return cx_mps; - } - // exchangeMps - if (a < qeIcx) { - d = 1 ^ cx_mps; - if (qeTableIcx.switchFlag === 1) { - cx_mps = d; - } - cx_index = qeTableIcx.nlps; - } else { - d = cx_mps; - cx_index = qeTableIcx.nmps; - } - } - // C.3.3 renormD; - do { - if (this.ct === 0) { - this.byteIn(); - } - - a <<= 1; - this.chigh = ((this.chigh << 1) & 0xFFFF) | ((this.clow >> 15) & 1); - this.clow = (this.clow << 1) & 0xFFFF; - this.ct--; - } while ((a & 0x8000) === 0); - this.a = a; - - contexts[pos] = cx_index << 1 | cx_mps; - return d; - } - }; - - return ArithmeticDecoder; -})(); - -exports.ArithmeticDecoder = ArithmeticDecoder; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCoreCharsets = {})); - } -}(this, function (exports) { - -var ISOAdobeCharset = [ - '.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', - 'percent', 'ampersand', 'quoteright', 'parenleft', 'parenright', - 'asterisk', 'plus', 'comma', 'hyphen', 'period', 'slash', 'zero', - 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', - 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater', 'question', - 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', - 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', - 'bracketleft', 'backslash', 'bracketright', 'asciicircum', 'underscore', - 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', - 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', - 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', - 'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', - 'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', - 'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', - 'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', - 'quotedblbase', 'quotedblright', 'guillemotright', 'ellipsis', - 'perthousand', 'questiondown', 'grave', 'acute', 'circumflex', 'tilde', - 'macron', 'breve', 'dotaccent', 'dieresis', 'ring', 'cedilla', - 'hungarumlaut', 'ogonek', 'caron', 'emdash', 'AE', 'ordfeminine', - 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', 'dotlessi', 'lslash', - 'oslash', 'oe', 'germandbls', 'onesuperior', 'logicalnot', 'mu', - 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', 'onequarter', - 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', 'twosuperior', - 'registered', 'minus', 'eth', 'multiply', 'threesuperior', 'copyright', - 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', 'Atilde', - 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', 'Iacute', - 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', 'Ocircumflex', - 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', 'Ucircumflex', - 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', 'aacute', - 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', 'ccedilla', - 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', 'icircumflex', - 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', 'odieresis', - 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', 'udieresis', - 'ugrave', 'yacute', 'ydieresis', 'zcaron' -]; - -var ExpertCharset = [ - '.notdef', 'space', 'exclamsmall', 'Hungarumlautsmall', 'dollaroldstyle', - 'dollarsuperior', 'ampersandsmall', 'Acutesmall', 'parenleftsuperior', - 'parenrightsuperior', 'twodotenleader', 'onedotenleader', 'comma', - 'hyphen', 'period', 'fraction', 'zerooldstyle', 'oneoldstyle', - 'twooldstyle', 'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', - 'sixoldstyle', 'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', - 'colon', 'semicolon', 'commasuperior', 'threequartersemdash', - 'periodsuperior', 'questionsmall', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'Circumflexsmall', 'hyphensuperior', 'Gravesmall', - 'Asmall', 'Bsmall', 'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', - 'Hsmall', 'Ismall', 'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', - 'Osmall', 'Psmall', 'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', - 'Vsmall', 'Wsmall', 'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', - 'onefitted', 'rupiah', 'Tildesmall', 'exclamdownsmall', 'centoldstyle', - 'Lslashsmall', 'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', - 'Brevesmall', 'Caronsmall', 'Dotaccentsmall', 'Macronsmall', - 'figuredash', 'hypheninferior', 'Ogoneksmall', 'Ringsmall', - 'Cedillasmall', 'onequarter', 'onehalf', 'threequarters', - 'questiondownsmall', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior', 'Agravesmall', 'Aacutesmall', - 'Acircumflexsmall', 'Atildesmall', 'Adieresissmall', 'Aringsmall', - 'AEsmall', 'Ccedillasmall', 'Egravesmall', 'Eacutesmall', - 'Ecircumflexsmall', 'Edieresissmall', 'Igravesmall', 'Iacutesmall', - 'Icircumflexsmall', 'Idieresissmall', 'Ethsmall', 'Ntildesmall', - 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', 'Otildesmall', - 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', 'Uacutesmall', - 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', 'Thornsmall', - 'Ydieresissmall' -]; - -var ExpertSubsetCharset = [ - '.notdef', 'space', 'dollaroldstyle', 'dollarsuperior', - 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', - 'onedotenleader', 'comma', 'hyphen', 'period', 'fraction', - 'zerooldstyle', 'oneoldstyle', 'twooldstyle', 'threeoldstyle', - 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', 'sevenoldstyle', - 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon', 'commasuperior', - 'threequartersemdash', 'periodsuperior', 'asuperior', 'bsuperior', - 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', 'lsuperior', - 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', - 'tsuperior', 'ff', 'fi', 'fl', 'ffi', 'ffl', 'parenleftinferior', - 'parenrightinferior', 'hyphensuperior', 'colonmonetary', 'onefitted', - 'rupiah', 'centoldstyle', 'figuredash', 'hypheninferior', 'onequarter', - 'onehalf', 'threequarters', 'oneeighth', 'threeeighths', 'fiveeighths', - 'seveneighths', 'onethird', 'twothirds', 'zerosuperior', 'onesuperior', - 'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior', - 'sixsuperior', 'sevensuperior', 'eightsuperior', 'ninesuperior', - 'zeroinferior', 'oneinferior', 'twoinferior', 'threeinferior', - 'fourinferior', 'fiveinferior', 'sixinferior', 'seveninferior', - 'eightinferior', 'nineinferior', 'centinferior', 'dollarinferior', - 'periodinferior', 'commainferior' -]; - -exports.ISOAdobeCharset = ISOAdobeCharset; -exports.ExpertCharset = ExpertCharset; -exports.ExpertSubsetCharset = ExpertSubsetCharset; -})); - - -(function (root, factory) { - { - factory((root.pdfjsCoreGlyphList = {})); - } -}(this, function (exports) { +}(this, function (exports) { var GlyphsUnicode = { A: 0x0041, @@ -10660,427 +8713,2382 @@ var Metrics = { 'a190': 970, 'a191': 918 } -}; +}; + +exports.Metrics = Metrics; +})); + + + + +var NetworkManager = (function NetworkManagerClosure() { + + var OK_RESPONSE = 200; + var PARTIAL_CONTENT_RESPONSE = 206; + + function NetworkManager(url, args) { + this.url = url; + args = args || {}; + this.isHttp = /^https?:/i.test(url); + this.httpHeaders = (this.isHttp && args.httpHeaders) || {}; + this.withCredentials = args.withCredentials || false; + this.getXhr = args.getXhr || + function NetworkManager_getXhr() { + return new XMLHttpRequest(); + }; + + this.currXhrId = 0; + this.pendingRequests = {}; + this.loadedRequests = {}; + } + + function getArrayBuffer(xhr) { + var data = xhr.response; + if (typeof data !== 'string') { + return data; + } + var length = data.length; + var array = new Uint8Array(length); + for (var i = 0; i < length; i++) { + array[i] = data.charCodeAt(i) & 0xFF; + } + return array.buffer; + } + + var supportsMozChunked = (function supportsMozChunkedClosure() { + try { + var x = new XMLHttpRequest(); + // Firefox 37- required .open() to be called before setting responseType. + // https://bugzilla.mozilla.org/show_bug.cgi?id=707484 + // Even though the URL is not visited, .open() could fail if the URL is + // blocked, e.g. via the connect-src CSP directive or the NoScript addon. + // When this error occurs, this feature detection method will mistakenly + // report that moz-chunked-arraybuffer is not supported in Firefox 37-. + x.open('GET', 'https://example.com'); + x.responseType = 'moz-chunked-arraybuffer'; + return x.responseType === 'moz-chunked-arraybuffer'; + } catch (e) { + return false; + } + })(); + + NetworkManager.prototype = { + requestRange: function NetworkManager_requestRange(begin, end, listeners) { + var args = { + begin: begin, + end: end + }; + for (var prop in listeners) { + args[prop] = listeners[prop]; + } + return this.request(args); + }, + + requestFull: function NetworkManager_requestFull(listeners) { + return this.request(listeners); + }, + + request: function NetworkManager_request(args) { + var xhr = this.getXhr(); + var xhrId = this.currXhrId++; + var pendingRequest = this.pendingRequests[xhrId] = { + xhr: xhr + }; + + xhr.open('GET', this.url); + xhr.withCredentials = this.withCredentials; + for (var property in this.httpHeaders) { + var value = this.httpHeaders[property]; + if (typeof value === 'undefined') { + continue; + } + xhr.setRequestHeader(property, value); + } + if (this.isHttp && 'begin' in args && 'end' in args) { + var rangeStr = args.begin + '-' + (args.end - 1); + xhr.setRequestHeader('Range', 'bytes=' + rangeStr); + pendingRequest.expectedStatus = 206; + } else { + pendingRequest.expectedStatus = 200; + } + + var useMozChunkedLoading = supportsMozChunked && !!args.onProgressiveData; + if (useMozChunkedLoading) { + xhr.responseType = 'moz-chunked-arraybuffer'; + pendingRequest.onProgressiveData = args.onProgressiveData; + pendingRequest.mozChunked = true; + } else { + xhr.responseType = 'arraybuffer'; + } + + if (args.onError) { + xhr.onerror = function(evt) { + args.onError(xhr.status); + }; + } + xhr.onreadystatechange = this.onStateChange.bind(this, xhrId); + xhr.onprogress = this.onProgress.bind(this, xhrId); + + pendingRequest.onHeadersReceived = args.onHeadersReceived; + pendingRequest.onDone = args.onDone; + pendingRequest.onError = args.onError; + pendingRequest.onProgress = args.onProgress; + + xhr.send(null); + + return xhrId; + }, + + onProgress: function NetworkManager_onProgress(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } + + if (pendingRequest.mozChunked) { + var chunk = getArrayBuffer(pendingRequest.xhr); + pendingRequest.onProgressiveData(chunk); + } + + var onProgress = pendingRequest.onProgress; + if (onProgress) { + onProgress(evt); + } + }, + + onStateChange: function NetworkManager_onStateChange(xhrId, evt) { + var pendingRequest = this.pendingRequests[xhrId]; + if (!pendingRequest) { + // Maybe abortRequest was called... + return; + } + + var xhr = pendingRequest.xhr; + if (xhr.readyState >= 2 && pendingRequest.onHeadersReceived) { + pendingRequest.onHeadersReceived(); + delete pendingRequest.onHeadersReceived; + } + + if (xhr.readyState !== 4) { + return; + } + + if (!(xhrId in this.pendingRequests)) { + // The XHR request might have been aborted in onHeadersReceived() + // callback, in which case we should abort request + return; + } + + delete this.pendingRequests[xhrId]; + + // success status == 0 can be on ftp, file and other protocols + if (xhr.status === 0 && this.isHttp) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } + var xhrStatus = xhr.status || OK_RESPONSE; + + // From http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.35.2: + // "A server MAY ignore the Range header". This means it's possible to + // get a 200 rather than a 206 response from a range request. + var ok_response_on_range_request = + xhrStatus === OK_RESPONSE && + pendingRequest.expectedStatus === PARTIAL_CONTENT_RESPONSE; + + if (!ok_response_on_range_request && + xhrStatus !== pendingRequest.expectedStatus) { + if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + return; + } + + this.loadedRequests[xhrId] = true; + + var chunk = getArrayBuffer(xhr); + if (xhrStatus === PARTIAL_CONTENT_RESPONSE) { + var rangeHeader = xhr.getResponseHeader('Content-Range'); + var matches = /bytes (\d+)-(\d+)\/(\d+)/.exec(rangeHeader); + var begin = parseInt(matches[1], 10); + pendingRequest.onDone({ + begin: begin, + chunk: chunk + }); + } else if (pendingRequest.onProgressiveData) { + pendingRequest.onDone(null); + } else if (chunk) { + pendingRequest.onDone({ + begin: 0, + chunk: chunk + }); + } else if (pendingRequest.onError) { + pendingRequest.onError(xhr.status); + } + }, + + hasPendingRequests: function NetworkManager_hasPendingRequests() { + for (var xhrId in this.pendingRequests) { + return true; + } + return false; + }, + + getRequestXhr: function NetworkManager_getXhr(xhrId) { + return this.pendingRequests[xhrId].xhr; + }, + + isStreamingRequest: function NetworkManager_isStreamingRequest(xhrId) { + return !!(this.pendingRequests[xhrId].onProgressiveData); + }, + + isPendingRequest: function NetworkManager_isPendingRequest(xhrId) { + return xhrId in this.pendingRequests; + }, + + isLoadedRequest: function NetworkManager_isLoadedRequest(xhrId) { + return xhrId in this.loadedRequests; + }, + + abortAllRequests: function NetworkManager_abortAllRequests() { + for (var xhrId in this.pendingRequests) { + this.abortRequest(xhrId | 0); + } + }, + + abortRequest: function NetworkManager_abortRequest(xhrId) { + var xhr = this.pendingRequests[xhrId].xhr; + delete this.pendingRequests[xhrId]; + xhr.abort(); + } + }; + + return NetworkManager; +})(); + +(function (root, factory) { + { + factory((root.pdfjsCoreNetwork = {})); + } +}(this, function (exports) { + exports.NetworkManager = NetworkManager; +})); + + +(function (root, factory) { + { + factory((root.pdfjsSharedGlobal = {})); + } +}(this, function (exports) { + + var globalScope = (typeof window !== 'undefined') ? window : + (typeof global !== 'undefined') ? global : + (typeof self !== 'undefined') ? self : this; + + var isWorker = (typeof window === 'undefined'); + + // The global PDFJS object exposes the API + // In production, it will be declared outside a global wrapper + // In development, it will be declared here + if (!globalScope.PDFJS) { + globalScope.PDFJS = {}; + } + + globalScope.PDFJS.pdfBug = false; + + exports.globalScope = globalScope; + exports.isWorker = isWorker; + exports.PDFJS = globalScope.PDFJS; +})); + + +(function (root, factory) { + { + factory((root.pdfjsCoreBidi = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; + +var bidi = PDFJS.bidi = (function bidiClosure() { + // Character types for symbols from 0000 to 00FF. + var baseTypes = [ + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'S', 'B', 'S', 'WS', + 'B', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'BN', 'B', 'B', 'B', 'S', 'WS', 'ON', 'ON', 'ET', 'ET', 'ET', 'ON', + 'ON', 'ON', 'ON', 'ON', 'ON', 'CS', 'ON', 'CS', 'ON', 'EN', 'EN', 'EN', + 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'ON', 'ON', 'ON', 'ON', 'ON', + 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'ON', 'ON', + 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'ON', 'ON', 'ON', 'ON', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'B', 'BN', + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', + 'BN', 'CS', 'ON', 'ET', 'ET', 'ET', 'ET', 'ON', 'ON', 'ON', 'ON', 'L', 'ON', + 'ON', 'ON', 'ON', 'ON', 'ET', 'ET', 'EN', 'EN', 'ON', 'L', 'ON', 'ON', 'ON', + 'EN', 'L', 'ON', 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', + 'L', 'L', 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L' + ]; + + // Character types for symbols from 0600 to 06FF + var arabicTypes = [ + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'CS', 'AL', 'ON', 'ON', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', + 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', + 'AN', 'ET', 'AN', 'AN', 'AL', 'AL', 'AL', 'NSM', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', + 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'ON', 'NSM', + 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', + 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL' + ]; + + function isOdd(i) { + return (i & 1) !== 0; + } + + function isEven(i) { + return (i & 1) === 0; + } + + function findUnequal(arr, start, value) { + for (var j = start, jj = arr.length; j < jj; ++j) { + if (arr[j] !== value) { + return j; + } + } + return j; + } + + function setValues(arr, start, end, value) { + for (var j = start; j < end; ++j) { + arr[j] = value; + } + } + + function reverseValues(arr, start, end) { + for (var i = start, j = end - 1; i < j; ++i, --j) { + var temp = arr[i]; + arr[i] = arr[j]; + arr[j] = temp; + } + } + + function createBidiText(str, isLTR, vertical) { + return { + str: str, + dir: (vertical ? 'ttb' : (isLTR ? 'ltr' : 'rtl')) + }; + } + + // These are used in bidi(), which is called frequently. We re-use them on + // each call to avoid unnecessary allocations. + var chars = []; + var types = []; + + function bidi(str, startLevel, vertical) { + var isLTR = true; + var strLength = str.length; + if (strLength === 0 || vertical) { + return createBidiText(str, isLTR, vertical); + } + + // Get types and fill arrays + chars.length = strLength; + types.length = strLength; + var numBidi = 0; + + var i, ii; + for (i = 0; i < strLength; ++i) { + chars[i] = str.charAt(i); + + var charCode = str.charCodeAt(i); + var charType = 'L'; + if (charCode <= 0x00ff) { + charType = baseTypes[charCode]; + } else if (0x0590 <= charCode && charCode <= 0x05f4) { + charType = 'R'; + } else if (0x0600 <= charCode && charCode <= 0x06ff) { + charType = arabicTypes[charCode & 0xff]; + } else if (0x0700 <= charCode && charCode <= 0x08AC) { + charType = 'AL'; + } + if (charType === 'R' || charType === 'AL' || charType === 'AN') { + numBidi++; + } + types[i] = charType; + } + + // Detect the bidi method + // - If there are no rtl characters then no bidi needed + // - If less than 30% chars are rtl then string is primarily ltr + // - If more than 30% chars are rtl then string is primarily rtl + if (numBidi === 0) { + isLTR = true; + return createBidiText(str, isLTR); + } + + if (startLevel === -1) { + if ((strLength / numBidi) < 0.3) { + isLTR = true; + startLevel = 0; + } else { + isLTR = false; + startLevel = 1; + } + } + + var levels = []; + for (i = 0; i < strLength; ++i) { + levels[i] = startLevel; + } + + /* + X1-X10: skip most of this, since we are NOT doing the embeddings. + */ + var e = (isOdd(startLevel) ? 'R' : 'L'); + var sor = e; + var eor = sor; + + /* + W1. Examine each non-spacing mark (NSM) in the level run, and change the + type of the NSM to the type of the previous character. If the NSM is at the + start of the level run, it will get the type of sor. + */ + var lastType = sor; + for (i = 0; i < strLength; ++i) { + if (types[i] === 'NSM') { + types[i] = lastType; + } else { + lastType = types[i]; + } + } + + /* + W2. Search backwards from each instance of a European number until the + first strong type (R, L, AL, or sor) is found. If an AL is found, change + the type of the European number to Arabic number. + */ + lastType = sor; + var t; + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'EN') { + types[i] = (lastType === 'AL') ? 'AN' : 'EN'; + } else if (t === 'R' || t === 'L' || t === 'AL') { + lastType = t; + } + } + + /* + W3. Change all ALs to R. + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'AL') { + types[i] = 'R'; + } + } + + /* + W4. A single European separator between two European numbers changes to a + European number. A single common separator between two numbers of the same + type changes to that type: + */ + for (i = 1; i < strLength - 1; ++i) { + if (types[i] === 'ES' && types[i - 1] === 'EN' && types[i + 1] === 'EN') { + types[i] = 'EN'; + } + if (types[i] === 'CS' && + (types[i - 1] === 'EN' || types[i - 1] === 'AN') && + types[i + 1] === types[i - 1]) { + types[i] = types[i - 1]; + } + } + + /* + W5. A sequence of European terminators adjacent to European numbers changes + to all European numbers: + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'EN') { + // do before + var j; + for (j = i - 1; j >= 0; --j) { + if (types[j] !== 'ET') { + break; + } + types[j] = 'EN'; + } + // do after + for (j = i + 1; j < strLength; --j) { + if (types[j] !== 'ET') { + break; + } + types[j] = 'EN'; + } + } + } + + /* + W6. Otherwise, separators and terminators change to Other Neutral: + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'WS' || t === 'ES' || t === 'ET' || t === 'CS') { + types[i] = 'ON'; + } + } + + /* + W7. Search backwards from each instance of a European number until the + first strong type (R, L, or sor) is found. If an L is found, then change + the type of the European number to L. + */ + lastType = sor; + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (t === 'EN') { + types[i] = ((lastType === 'L') ? 'L' : 'EN'); + } else if (t === 'R' || t === 'L') { + lastType = t; + } + } + + /* + N1. A sequence of neutrals takes the direction of the surrounding strong + text if the text on both sides has the same direction. European and Arabic + numbers are treated as though they were R. Start-of-level-run (sor) and + end-of-level-run (eor) are used at level run boundaries. + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'ON') { + var end = findUnequal(types, i + 1, 'ON'); + var before = sor; + if (i > 0) { + before = types[i - 1]; + } + + var after = eor; + if (end + 1 < strLength) { + after = types[end + 1]; + } + if (before !== 'L') { + before = 'R'; + } + if (after !== 'L') { + after = 'R'; + } + if (before === after) { + setValues(types, i, end, before); + } + i = end - 1; // reset to end (-1 so next iteration is ok) + } + } + + /* + N2. Any remaining neutrals take the embedding direction. + */ + for (i = 0; i < strLength; ++i) { + if (types[i] === 'ON') { + types[i] = e; + } + } + + /* + I1. For all characters with an even (left-to-right) embedding direction, + those of type R go up one level and those of type AN or EN go up two + levels. + I2. For all characters with an odd (right-to-left) embedding direction, + those of type L, EN or AN go up one level. + */ + for (i = 0; i < strLength; ++i) { + t = types[i]; + if (isEven(levels[i])) { + if (t === 'R') { + levels[i] += 1; + } else if (t === 'AN' || t === 'EN') { + levels[i] += 2; + } + } else { // isOdd + if (t === 'L' || t === 'AN' || t === 'EN') { + levels[i] += 1; + } + } + } + + /* + L1. On each line, reset the embedding level of the following characters to + the paragraph embedding level: + + segment separators, + paragraph separators, + any sequence of whitespace characters preceding a segment separator or + paragraph separator, and any sequence of white space characters at the end + of the line. + */ + + // don't bother as text is only single line + + /* + L2. From the highest level found in the text to the lowest odd level on + each line, reverse any contiguous sequence of characters that are at that + level or higher. + */ + + // find highest level & lowest odd level + var highestLevel = -1; + var lowestOddLevel = 99; + var level; + for (i = 0, ii = levels.length; i < ii; ++i) { + level = levels[i]; + if (highestLevel < level) { + highestLevel = level; + } + if (lowestOddLevel > level && isOdd(level)) { + lowestOddLevel = level; + } + } + + // now reverse between those limits + for (level = highestLevel; level >= lowestOddLevel; --level) { + // find segments to reverse + var start = -1; + for (i = 0, ii = levels.length; i < ii; ++i) { + if (levels[i] < level) { + if (start >= 0) { + reverseValues(chars, start, i); + start = -1; + } + } else if (start < 0) { + start = i; + } + } + if (start >= 0) { + reverseValues(chars, start, levels.length); + } + } + + /* + L3. Combining marks applied to a right-to-left base character will at this + point precede their base character. If the rendering engine expects them to + follow the base characters in the final display process, then the ordering + of the marks and the base character must be reversed. + */ + + // don't bother for now + + /* + L4. A character that possesses the mirrored property as specified by + Section 4.7, Mirrored, must be depicted by a mirrored glyph if the resolved + directionality of that character is R. + */ + + // don't mirror as characters are already mirrored in the pdf + + // Finally, return string + for (i = 0, ii = chars.length; i < ii; ++i) { + var ch = chars[i]; + if (ch === '<' || ch === '>') { + chars[i] = ''; + } + } + return createBidiText(chars.join(''), isLTR); + } + + return bidi; +})(); + +exports.bidi = bidi; +})); + + +(function (root, factory) { + { + factory((root.pdfjsSharedUtil = {}), root.pdfjsSharedGlobal); + } +}(this, function (exports, sharedGlobal) { + +var PDFJS = sharedGlobal.PDFJS; +var globalScope = sharedGlobal.globalScope; + +var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0]; + +var TextRenderingMode = { + FILL: 0, + STROKE: 1, + FILL_STROKE: 2, + INVISIBLE: 3, + FILL_ADD_TO_PATH: 4, + STROKE_ADD_TO_PATH: 5, + FILL_STROKE_ADD_TO_PATH: 6, + ADD_TO_PATH: 7, + FILL_STROKE_MASK: 3, + ADD_TO_PATH_FLAG: 4 +}; + +var ImageKind = { + GRAYSCALE_1BPP: 1, + RGB_24BPP: 2, + RGBA_32BPP: 3 +}; + +var AnnotationType = { + TEXT: 1, + LINK: 2, + FREETEXT: 3, + LINE: 4, + SQUARE: 5, + CIRCLE: 6, + POLYGON: 7, + POLYLINE: 8, + HIGHLIGHT: 9, + UNDERLINE: 10, + SQUIGGLY: 11, + STRIKEOUT: 12, + STAMP: 13, + CARET: 14, + INK: 15, + POPUP: 16, + FILEATTACHMENT: 17, + SOUND: 18, + MOVIE: 19, + WIDGET: 20, + SCREEN: 21, + PRINTERMARK: 22, + TRAPNET: 23, + WATERMARK: 24, + THREED: 25, + REDACT: 26 +}; + +var AnnotationFlag = { + INVISIBLE: 0x01, + HIDDEN: 0x02, + PRINT: 0x04, + NOZOOM: 0x08, + NOROTATE: 0x10, + NOVIEW: 0x20, + READONLY: 0x40, + LOCKED: 0x80, + TOGGLENOVIEW: 0x100, + LOCKEDCONTENTS: 0x200 +}; + +var AnnotationBorderStyleType = { + SOLID: 1, + DASHED: 2, + BEVELED: 3, + INSET: 4, + UNDERLINE: 5 +}; + +var StreamType = { + UNKNOWN: 0, + FLATE: 1, + LZW: 2, + DCT: 3, + JPX: 4, + JBIG: 5, + A85: 6, + AHX: 7, + CCF: 8, + RL: 9 +}; + +var FontType = { + UNKNOWN: 0, + TYPE1: 1, + TYPE1C: 2, + CIDFONTTYPE0: 3, + CIDFONTTYPE0C: 4, + TRUETYPE: 5, + CIDFONTTYPE2: 6, + TYPE3: 7, + OPENTYPE: 8, + TYPE0: 9, + MMTYPE1: 10 +}; + +PDFJS.VERBOSITY_LEVELS = { + errors: 0, + warnings: 1, + infos: 5 +}; + +// All the possible operations for an operator list. +var OPS = PDFJS.OPS = { + // Intentionally start from 1 so it is easy to spot bad operators that will be + // 0's. + dependency: 1, + setLineWidth: 2, + setLineCap: 3, + setLineJoin: 4, + setMiterLimit: 5, + setDash: 6, + setRenderingIntent: 7, + setFlatness: 8, + setGState: 9, + save: 10, + restore: 11, + transform: 12, + moveTo: 13, + lineTo: 14, + curveTo: 15, + curveTo2: 16, + curveTo3: 17, + closePath: 18, + rectangle: 19, + stroke: 20, + closeStroke: 21, + fill: 22, + eoFill: 23, + fillStroke: 24, + eoFillStroke: 25, + closeFillStroke: 26, + closeEOFillStroke: 27, + endPath: 28, + clip: 29, + eoClip: 30, + beginText: 31, + endText: 32, + setCharSpacing: 33, + setWordSpacing: 34, + setHScale: 35, + setLeading: 36, + setFont: 37, + setTextRenderingMode: 38, + setTextRise: 39, + moveText: 40, + setLeadingMoveText: 41, + setTextMatrix: 42, + nextLine: 43, + showText: 44, + showSpacedText: 45, + nextLineShowText: 46, + nextLineSetSpacingShowText: 47, + setCharWidth: 48, + setCharWidthAndBounds: 49, + setStrokeColorSpace: 50, + setFillColorSpace: 51, + setStrokeColor: 52, + setStrokeColorN: 53, + setFillColor: 54, + setFillColorN: 55, + setStrokeGray: 56, + setFillGray: 57, + setStrokeRGBColor: 58, + setFillRGBColor: 59, + setStrokeCMYKColor: 60, + setFillCMYKColor: 61, + shadingFill: 62, + beginInlineImage: 63, + beginImageData: 64, + endInlineImage: 65, + paintXObject: 66, + markPoint: 67, + markPointProps: 68, + beginMarkedContent: 69, + beginMarkedContentProps: 70, + endMarkedContent: 71, + beginCompat: 72, + endCompat: 73, + paintFormXObjectBegin: 74, + paintFormXObjectEnd: 75, + beginGroup: 76, + endGroup: 77, + beginAnnotations: 78, + endAnnotations: 79, + beginAnnotation: 80, + endAnnotation: 81, + paintJpegXObject: 82, + paintImageMaskXObject: 83, + paintImageMaskXObjectGroup: 84, + paintImageXObject: 85, + paintInlineImageXObject: 86, + paintInlineImageXObjectGroup: 87, + paintImageXObjectRepeat: 88, + paintImageMaskXObjectRepeat: 89, + paintSolidColorImageMask: 90, + constructPath: 91 +}; + +// A notice for devs. These are good for things that are helpful to devs, such +// as warning that Workers were disabled, which is important to devs but not +// end users. +function info(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.infos) { + console.log('Info: ' + msg); + } +} + +// Non-fatal warnings. +function warn(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.warnings) { + console.log('Warning: ' + msg); + } +} + +// Deprecated API function -- treated as warnings. +function deprecated(details) { + warn('Deprecated API usage: ' + details); +} + +// Fatal errors that should trigger the fallback UI and halt execution by +// throwing an exception. +function error(msg) { + if (PDFJS.verbosity >= PDFJS.VERBOSITY_LEVELS.errors) { + console.log('Error: ' + msg); + console.log(backtrace()); + } + throw new Error(msg); +} + +function backtrace() { + try { + throw new Error(); + } catch (e) { + return e.stack ? e.stack.split('\n').slice(2).join('\n') : ''; + } +} + +function assert(cond, msg) { + if (!cond) { + error(msg); + } +} + +var UNSUPPORTED_FEATURES = PDFJS.UNSUPPORTED_FEATURES = { + unknown: 'unknown', + forms: 'forms', + javaScript: 'javaScript', + smask: 'smask', + shadingPattern: 'shadingPattern', + font: 'font' +}; + +// Combines two URLs. The baseUrl shall be absolute URL. If the url is an +// absolute URL, it will be returned as is. +function combineUrl(baseUrl, url) { + if (!url) { + return baseUrl; + } + if (/^[a-z][a-z0-9+\-.]*:/i.test(url)) { + return url; + } + var i; + if (url.charAt(0) === '/') { + // absolute path + i = baseUrl.indexOf('://'); + if (url.charAt(1) === '/') { + ++i; + } else { + i = baseUrl.indexOf('/', i + 3); + } + return baseUrl.substring(0, i) + url; + } else { + // relative path + var pathLength = baseUrl.length; + i = baseUrl.lastIndexOf('#'); + pathLength = i >= 0 ? i : pathLength; + i = baseUrl.lastIndexOf('?', pathLength); + pathLength = i >= 0 ? i : pathLength; + var prefixLength = baseUrl.lastIndexOf('/', pathLength); + return baseUrl.substring(0, prefixLength + 1) + url; + } +} + +// Validates if URL is safe and allowed, e.g. to avoid XSS. +function isValidUrl(url, allowRelative) { + if (!url) { + return false; + } + // RFC 3986 (http://tools.ietf.org/html/rfc3986#section-3.1) + // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) + var protocol = /^[a-z][a-z0-9+\-.]*(?=:)/i.exec(url); + if (!protocol) { + return allowRelative; + } + protocol = protocol[0].toLowerCase(); + switch (protocol) { + case 'http': + case 'https': + case 'ftp': + case 'mailto': + case 'tel': + return true; + default: + return false; + } +} +PDFJS.isValidUrl = isValidUrl; + +function shadow(obj, prop, value) { + Object.defineProperty(obj, prop, { value: value, + enumerable: true, + configurable: true, + writable: false }); + return value; +} +PDFJS.shadow = shadow; + +var LinkTarget = PDFJS.LinkTarget = { + NONE: 0, // Default value. + SELF: 1, + BLANK: 2, + PARENT: 3, + TOP: 4, +}; +var LinkTargetStringMap = [ + '', + '_self', + '_blank', + '_parent', + '_top' +]; + +function isExternalLinkTargetSet() { + if (PDFJS.openExternalLinksInNewWindow) { + deprecated('PDFJS.openExternalLinksInNewWindow, please use ' + + '"PDFJS.externalLinkTarget = PDFJS.LinkTarget.BLANK" instead.'); + if (PDFJS.externalLinkTarget === LinkTarget.NONE) { + PDFJS.externalLinkTarget = LinkTarget.BLANK; + } + // Reset the deprecated parameter, to suppress further warnings. + PDFJS.openExternalLinksInNewWindow = false; + } + switch (PDFJS.externalLinkTarget) { + case LinkTarget.NONE: + return false; + case LinkTarget.SELF: + case LinkTarget.BLANK: + case LinkTarget.PARENT: + case LinkTarget.TOP: + return true; + } + warn('PDFJS.externalLinkTarget is invalid: ' + PDFJS.externalLinkTarget); + // Reset the external link target, to suppress further warnings. + PDFJS.externalLinkTarget = LinkTarget.NONE; + return false; +} +PDFJS.isExternalLinkTargetSet = isExternalLinkTargetSet; + +var PasswordResponses = PDFJS.PasswordResponses = { + NEED_PASSWORD: 1, + INCORRECT_PASSWORD: 2 +}; + +var PasswordException = (function PasswordExceptionClosure() { + function PasswordException(msg, code) { + this.name = 'PasswordException'; + this.message = msg; + this.code = code; + } + + PasswordException.prototype = new Error(); + PasswordException.constructor = PasswordException; + + return PasswordException; +})(); +PDFJS.PasswordException = PasswordException; + +var UnknownErrorException = (function UnknownErrorExceptionClosure() { + function UnknownErrorException(msg, details) { + this.name = 'UnknownErrorException'; + this.message = msg; + this.details = details; + } + + UnknownErrorException.prototype = new Error(); + UnknownErrorException.constructor = UnknownErrorException; + + return UnknownErrorException; +})(); +PDFJS.UnknownErrorException = UnknownErrorException; + +var InvalidPDFException = (function InvalidPDFExceptionClosure() { + function InvalidPDFException(msg) { + this.name = 'InvalidPDFException'; + this.message = msg; + } + + InvalidPDFException.prototype = new Error(); + InvalidPDFException.constructor = InvalidPDFException; + + return InvalidPDFException; +})(); +PDFJS.InvalidPDFException = InvalidPDFException; + +var MissingPDFException = (function MissingPDFExceptionClosure() { + function MissingPDFException(msg) { + this.name = 'MissingPDFException'; + this.message = msg; + } + + MissingPDFException.prototype = new Error(); + MissingPDFException.constructor = MissingPDFException; + + return MissingPDFException; +})(); +PDFJS.MissingPDFException = MissingPDFException; + +var UnexpectedResponseException = + (function UnexpectedResponseExceptionClosure() { + function UnexpectedResponseException(msg, status) { + this.name = 'UnexpectedResponseException'; + this.message = msg; + this.status = status; + } + + UnexpectedResponseException.prototype = new Error(); + UnexpectedResponseException.constructor = UnexpectedResponseException; + + return UnexpectedResponseException; +})(); +PDFJS.UnexpectedResponseException = UnexpectedResponseException; + +var NotImplementedException = (function NotImplementedExceptionClosure() { + function NotImplementedException(msg) { + this.message = msg; + } + + NotImplementedException.prototype = new Error(); + NotImplementedException.prototype.name = 'NotImplementedException'; + NotImplementedException.constructor = NotImplementedException; + + return NotImplementedException; +})(); + +var MissingDataException = (function MissingDataExceptionClosure() { + function MissingDataException(begin, end) { + this.begin = begin; + this.end = end; + this.message = 'Missing data [' + begin + ', ' + end + ')'; + } + + MissingDataException.prototype = new Error(); + MissingDataException.prototype.name = 'MissingDataException'; + MissingDataException.constructor = MissingDataException; + + return MissingDataException; +})(); + +var XRefParseException = (function XRefParseExceptionClosure() { + function XRefParseException(msg) { + this.message = msg; + } + + XRefParseException.prototype = new Error(); + XRefParseException.prototype.name = 'XRefParseException'; + XRefParseException.constructor = XRefParseException; + + return XRefParseException; +})(); + + +function bytesToString(bytes) { + assert(bytes !== null && typeof bytes === 'object' && + bytes.length !== undefined, 'Invalid argument for bytesToString'); + var length = bytes.length; + var MAX_ARGUMENT_COUNT = 8192; + if (length < MAX_ARGUMENT_COUNT) { + return String.fromCharCode.apply(null, bytes); + } + var strBuf = []; + for (var i = 0; i < length; i += MAX_ARGUMENT_COUNT) { + var chunkEnd = Math.min(i + MAX_ARGUMENT_COUNT, length); + var chunk = bytes.subarray(i, chunkEnd); + strBuf.push(String.fromCharCode.apply(null, chunk)); + } + return strBuf.join(''); +} + +function stringToBytes(str) { + assert(typeof str === 'string', 'Invalid argument for stringToBytes'); + var length = str.length; + var bytes = new Uint8Array(length); + for (var i = 0; i < length; ++i) { + bytes[i] = str.charCodeAt(i) & 0xFF; + } + return bytes; +} + +function string32(value) { + return String.fromCharCode((value >> 24) & 0xff, (value >> 16) & 0xff, + (value >> 8) & 0xff, value & 0xff); +} + +function log2(x) { + var n = 1, i = 0; + while (x > n) { + n <<= 1; + i++; + } + return i; +} + +function readInt8(data, start) { + return (data[start] << 24) >> 24; +} + +function readUint16(data, offset) { + return (data[offset] << 8) | data[offset + 1]; +} + +function readUint32(data, offset) { + return ((data[offset] << 24) | (data[offset + 1] << 16) | + (data[offset + 2] << 8) | data[offset + 3]) >>> 0; +} + +// Lazy test the endianness of the platform +// NOTE: This will be 'true' for simulated TypedArrays +function isLittleEndian() { + var buffer8 = new Uint8Array(2); + buffer8[0] = 1; + var buffer16 = new Uint16Array(buffer8.buffer); + return (buffer16[0] === 1); +} + +Object.defineProperty(PDFJS, 'isLittleEndian', { + configurable: true, + get: function PDFJS_isLittleEndian() { + return shadow(PDFJS, 'isLittleEndian', isLittleEndian()); + } +}); + + // Lazy test if the userAgent support CanvasTypedArrays +function hasCanvasTypedArrays() { + var canvas = document.createElement('canvas'); + canvas.width = canvas.height = 1; + var ctx = canvas.getContext('2d'); + var imageData = ctx.createImageData(1, 1); + return (typeof imageData.data.buffer !== 'undefined'); +} + +Object.defineProperty(PDFJS, 'hasCanvasTypedArrays', { + configurable: true, + get: function PDFJS_hasCanvasTypedArrays() { + return shadow(PDFJS, 'hasCanvasTypedArrays', hasCanvasTypedArrays()); + } +}); + +var Uint32ArrayView = (function Uint32ArrayViewClosure() { + + function Uint32ArrayView(buffer, length) { + this.buffer = buffer; + this.byteLength = buffer.length; + this.length = length === undefined ? (this.byteLength >> 2) : length; + ensureUint32ArrayViewProps(this.length); + } + Uint32ArrayView.prototype = Object.create(null); + + var uint32ArrayViewSetters = 0; + function createUint32ArrayProp(index) { + return { + get: function () { + var buffer = this.buffer, offset = index << 2; + return (buffer[offset] | (buffer[offset + 1] << 8) | + (buffer[offset + 2] << 16) | (buffer[offset + 3] << 24)) >>> 0; + }, + set: function (value) { + var buffer = this.buffer, offset = index << 2; + buffer[offset] = value & 255; + buffer[offset + 1] = (value >> 8) & 255; + buffer[offset + 2] = (value >> 16) & 255; + buffer[offset + 3] = (value >>> 24) & 255; + } + }; + } + + function ensureUint32ArrayViewProps(length) { + while (uint32ArrayViewSetters < length) { + Object.defineProperty(Uint32ArrayView.prototype, + uint32ArrayViewSetters, + createUint32ArrayProp(uint32ArrayViewSetters)); + uint32ArrayViewSetters++; + } + } + + return Uint32ArrayView; +})(); + +exports.Uint32ArrayView = Uint32ArrayView; + +var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0]; + +var Util = PDFJS.Util = (function UtilClosure() { + function Util() {} + + var rgbBuf = ['rgb(', 0, ',', 0, ',', 0, ')']; + + // makeCssRgb() can be called thousands of times. Using |rgbBuf| avoids + // creating many intermediate strings. + Util.makeCssRgb = function Util_makeCssRgb(r, g, b) { + rgbBuf[1] = r; + rgbBuf[3] = g; + rgbBuf[5] = b; + return rgbBuf.join(''); + }; + + // Concatenates two transformation matrices together and returns the result. + Util.transform = function Util_transform(m1, m2) { + return [ + m1[0] * m2[0] + m1[2] * m2[1], + m1[1] * m2[0] + m1[3] * m2[1], + m1[0] * m2[2] + m1[2] * m2[3], + m1[1] * m2[2] + m1[3] * m2[3], + m1[0] * m2[4] + m1[2] * m2[5] + m1[4], + m1[1] * m2[4] + m1[3] * m2[5] + m1[5] + ]; + }; + + // For 2d affine transforms + Util.applyTransform = function Util_applyTransform(p, m) { + var xt = p[0] * m[0] + p[1] * m[2] + m[4]; + var yt = p[0] * m[1] + p[1] * m[3] + m[5]; + return [xt, yt]; + }; + + Util.applyInverseTransform = function Util_applyInverseTransform(p, m) { + var d = m[0] * m[3] - m[1] * m[2]; + var xt = (p[0] * m[3] - p[1] * m[2] + m[2] * m[5] - m[4] * m[3]) / d; + var yt = (-p[0] * m[1] + p[1] * m[0] + m[4] * m[1] - m[5] * m[0]) / d; + return [xt, yt]; + }; + + // Applies the transform to the rectangle and finds the minimum axially + // aligned bounding box. + Util.getAxialAlignedBoundingBox = + function Util_getAxialAlignedBoundingBox(r, m) { + + var p1 = Util.applyTransform(r, m); + var p2 = Util.applyTransform(r.slice(2, 4), m); + var p3 = Util.applyTransform([r[0], r[3]], m); + var p4 = Util.applyTransform([r[2], r[1]], m); + return [ + Math.min(p1[0], p2[0], p3[0], p4[0]), + Math.min(p1[1], p2[1], p3[1], p4[1]), + Math.max(p1[0], p2[0], p3[0], p4[0]), + Math.max(p1[1], p2[1], p3[1], p4[1]) + ]; + }; + + Util.inverseTransform = function Util_inverseTransform(m) { + var d = m[0] * m[3] - m[1] * m[2]; + return [m[3] / d, -m[1] / d, -m[2] / d, m[0] / d, + (m[2] * m[5] - m[4] * m[3]) / d, (m[4] * m[1] - m[5] * m[0]) / d]; + }; + + // Apply a generic 3d matrix M on a 3-vector v: + // | a b c | | X | + // | d e f | x | Y | + // | g h i | | Z | + // M is assumed to be serialized as [a,b,c,d,e,f,g,h,i], + // with v as [X,Y,Z] + Util.apply3dTransform = function Util_apply3dTransform(m, v) { + return [ + m[0] * v[0] + m[1] * v[1] + m[2] * v[2], + m[3] * v[0] + m[4] * v[1] + m[5] * v[2], + m[6] * v[0] + m[7] * v[1] + m[8] * v[2] + ]; + }; + + // This calculation uses Singular Value Decomposition. + // The SVD can be represented with formula A = USV. We are interested in the + // matrix S here because it represents the scale values. + Util.singularValueDecompose2dScale = + function Util_singularValueDecompose2dScale(m) { + + var transpose = [m[0], m[2], m[1], m[3]]; + + // Multiply matrix m with its transpose. + var a = m[0] * transpose[0] + m[1] * transpose[2]; + var b = m[0] * transpose[1] + m[1] * transpose[3]; + var c = m[2] * transpose[0] + m[3] * transpose[2]; + var d = m[2] * transpose[1] + m[3] * transpose[3]; + + // Solve the second degree polynomial to get roots. + var first = (a + d) / 2; + var second = Math.sqrt((a + d) * (a + d) - 4 * (a * d - c * b)) / 2; + var sx = first + second || 1; + var sy = first - second || 1; + + // Scale values are the square roots of the eigenvalues. + return [Math.sqrt(sx), Math.sqrt(sy)]; + }; + + // Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2) + // For coordinate systems whose origin lies in the bottom-left, this + // means normalization to (BL,TR) ordering. For systems with origin in the + // top-left, this means (TL,BR) ordering. + Util.normalizeRect = function Util_normalizeRect(rect) { + var r = rect.slice(0); // clone rect + if (rect[0] > rect[2]) { + r[0] = rect[2]; + r[2] = rect[0]; + } + if (rect[1] > rect[3]) { + r[1] = rect[3]; + r[3] = rect[1]; + } + return r; + }; + + // Returns a rectangle [x1, y1, x2, y2] corresponding to the + // intersection of rect1 and rect2. If no intersection, returns 'false' + // The rectangle coordinates of rect1, rect2 should be [x1, y1, x2, y2] + Util.intersect = function Util_intersect(rect1, rect2) { + function compare(a, b) { + return a - b; + } + + // Order points along the axes + var orderedX = [rect1[0], rect1[2], rect2[0], rect2[2]].sort(compare), + orderedY = [rect1[1], rect1[3], rect2[1], rect2[3]].sort(compare), + result = []; + + rect1 = Util.normalizeRect(rect1); + rect2 = Util.normalizeRect(rect2); + + // X: first and second points belong to different rectangles? + if ((orderedX[0] === rect1[0] && orderedX[1] === rect2[0]) || + (orderedX[0] === rect2[0] && orderedX[1] === rect1[0])) { + // Intersection must be between second and third points + result[0] = orderedX[1]; + result[2] = orderedX[2]; + } else { + return false; + } + + // Y: first and second points belong to different rectangles? + if ((orderedY[0] === rect1[1] && orderedY[1] === rect2[1]) || + (orderedY[0] === rect2[1] && orderedY[1] === rect1[1])) { + // Intersection must be between second and third points + result[1] = orderedY[1]; + result[3] = orderedY[2]; + } else { + return false; + } + + return result; + }; + + Util.sign = function Util_sign(num) { + return num < 0 ? -1 : 1; + }; + + Util.appendToArray = function Util_appendToArray(arr1, arr2) { + Array.prototype.push.apply(arr1, arr2); + }; + + Util.prependToArray = function Util_prependToArray(arr1, arr2) { + Array.prototype.unshift.apply(arr1, arr2); + }; + + Util.extendObj = function extendObj(obj1, obj2) { + for (var key in obj2) { + obj1[key] = obj2[key]; + } + }; + + Util.getInheritableProperty = function Util_getInheritableProperty(dict, + name) { + while (dict && !dict.has(name)) { + dict = dict.get('Parent'); + } + if (!dict) { + return null; + } + return dict.get(name); + }; + + Util.inherit = function Util_inherit(sub, base, prototype) { + sub.prototype = Object.create(base.prototype); + sub.prototype.constructor = sub; + for (var prop in prototype) { + sub.prototype[prop] = prototype[prop]; + } + }; + + Util.loadScript = function Util_loadScript(src, callback) { + var script = document.createElement('script'); + var loaded = false; + script.setAttribute('src', src); + if (callback) { + script.onload = function() { + if (!loaded) { + callback(); + } + loaded = true; + }; + } + document.getElementsByTagName('head')[0].appendChild(script); + }; + + return Util; +})(); + +/** + * PDF page viewport created based on scale, rotation and offset. + * @class + * @alias PDFJS.PageViewport + */ +var PageViewport = PDFJS.PageViewport = (function PageViewportClosure() { + /** + * @constructor + * @private + * @param viewBox {Array} xMin, yMin, xMax and yMax coordinates. + * @param scale {number} scale of the viewport. + * @param rotation {number} rotations of the viewport in degrees. + * @param offsetX {number} offset X + * @param offsetY {number} offset Y + * @param dontFlip {boolean} if true, axis Y will not be flipped. + */ + function PageViewport(viewBox, scale, rotation, offsetX, offsetY, dontFlip) { + this.viewBox = viewBox; + this.scale = scale; + this.rotation = rotation; + this.offsetX = offsetX; + this.offsetY = offsetY; + + // creating transform to convert pdf coordinate system to the normal + // canvas like coordinates taking in account scale and rotation + var centerX = (viewBox[2] + viewBox[0]) / 2; + var centerY = (viewBox[3] + viewBox[1]) / 2; + var rotateA, rotateB, rotateC, rotateD; + rotation = rotation % 360; + rotation = rotation < 0 ? rotation + 360 : rotation; + switch (rotation) { + case 180: + rotateA = -1; rotateB = 0; rotateC = 0; rotateD = 1; + break; + case 90: + rotateA = 0; rotateB = 1; rotateC = 1; rotateD = 0; + break; + case 270: + rotateA = 0; rotateB = -1; rotateC = -1; rotateD = 0; + break; + //case 0: + default: + rotateA = 1; rotateB = 0; rotateC = 0; rotateD = -1; + break; + } + + if (dontFlip) { + rotateC = -rotateC; rotateD = -rotateD; + } + + var offsetCanvasX, offsetCanvasY; + var width, height; + if (rotateA === 0) { + offsetCanvasX = Math.abs(centerY - viewBox[1]) * scale + offsetX; + offsetCanvasY = Math.abs(centerX - viewBox[0]) * scale + offsetY; + width = Math.abs(viewBox[3] - viewBox[1]) * scale; + height = Math.abs(viewBox[2] - viewBox[0]) * scale; + } else { + offsetCanvasX = Math.abs(centerX - viewBox[0]) * scale + offsetX; + offsetCanvasY = Math.abs(centerY - viewBox[1]) * scale + offsetY; + width = Math.abs(viewBox[2] - viewBox[0]) * scale; + height = Math.abs(viewBox[3] - viewBox[1]) * scale; + } + // creating transform for the following operations: + // translate(-centerX, -centerY), rotate and flip vertically, + // scale, and translate(offsetCanvasX, offsetCanvasY) + this.transform = [ + rotateA * scale, + rotateB * scale, + rotateC * scale, + rotateD * scale, + offsetCanvasX - rotateA * scale * centerX - rotateC * scale * centerY, + offsetCanvasY - rotateB * scale * centerX - rotateD * scale * centerY + ]; + + this.width = width; + this.height = height; + this.fontScale = scale; + } + PageViewport.prototype = /** @lends PDFJS.PageViewport.prototype */ { + /** + * Clones viewport with additional properties. + * @param args {Object} (optional) If specified, may contain the 'scale' or + * 'rotation' properties to override the corresponding properties in + * the cloned viewport. + * @returns {PDFJS.PageViewport} Cloned viewport. + */ + clone: function PageViewPort_clone(args) { + args = args || {}; + var scale = 'scale' in args ? args.scale : this.scale; + var rotation = 'rotation' in args ? args.rotation : this.rotation; + return new PageViewport(this.viewBox.slice(), scale, rotation, + this.offsetX, this.offsetY, args.dontFlip); + }, + /** + * Converts PDF point to the viewport coordinates. For examples, useful for + * converting PDF location into canvas pixel coordinates. + * @param x {number} X coordinate. + * @param y {number} Y coordinate. + * @returns {Object} Object that contains 'x' and 'y' properties of the + * point in the viewport coordinate space. + * @see {@link convertToPdfPoint} + * @see {@link convertToViewportRectangle} + */ + convertToViewportPoint: function PageViewport_convertToViewportPoint(x, y) { + return Util.applyTransform([x, y], this.transform); + }, + /** + * Converts PDF rectangle to the viewport coordinates. + * @param rect {Array} xMin, yMin, xMax and yMax coordinates. + * @returns {Array} Contains corresponding coordinates of the rectangle + * in the viewport coordinate space. + * @see {@link convertToViewportPoint} + */ + convertToViewportRectangle: + function PageViewport_convertToViewportRectangle(rect) { + var tl = Util.applyTransform([rect[0], rect[1]], this.transform); + var br = Util.applyTransform([rect[2], rect[3]], this.transform); + return [tl[0], tl[1], br[0], br[1]]; + }, + /** + * Converts viewport coordinates to the PDF location. For examples, useful + * for converting canvas pixel location into PDF one. + * @param x {number} X coordinate. + * @param y {number} Y coordinate. + * @returns {Object} Object that contains 'x' and 'y' properties of the + * point in the PDF coordinate space. + * @see {@link convertToViewportPoint} + */ + convertToPdfPoint: function PageViewport_convertToPdfPoint(x, y) { + return Util.applyInverseTransform([x, y], this.transform); + } + }; + return PageViewport; +})(); + +var PDFStringTranslateTable = [ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0x2D8, 0x2C7, 0x2C6, 0x2D9, 0x2DD, 0x2DB, 0x2DA, 0x2DC, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x2022, 0x2020, 0x2021, 0x2026, 0x2014, + 0x2013, 0x192, 0x2044, 0x2039, 0x203A, 0x2212, 0x2030, 0x201E, 0x201C, + 0x201D, 0x2018, 0x2019, 0x201A, 0x2122, 0xFB01, 0xFB02, 0x141, 0x152, 0x160, + 0x178, 0x17D, 0x131, 0x142, 0x153, 0x161, 0x17E, 0, 0x20AC +]; + +function stringToPDFString(str) { + var i, n = str.length, strBuf = []; + if (str[0] === '\xFE' && str[1] === '\xFF') { + // UTF16BE BOM + for (i = 2; i < n; i += 2) { + strBuf.push(String.fromCharCode( + (str.charCodeAt(i) << 8) | str.charCodeAt(i + 1))); + } + } else { + for (i = 0; i < n; ++i) { + var code = PDFStringTranslateTable[str.charCodeAt(i)]; + strBuf.push(code ? String.fromCharCode(code) : str.charAt(i)); + } + } + return strBuf.join(''); +} -exports.Metrics = Metrics; -})); +function stringToUTF8String(str) { + return decodeURIComponent(escape(str)); +} +function utf8StringToString(str) { + return unescape(encodeURIComponent(str)); +} -(function (root, factory) { - { - factory((root.pdfjsCoreBidi = {}), root.pdfjsSharedGlobal); +function isEmptyObj(obj) { + for (var key in obj) { + return false; } -}(this, function (exports, sharedGlobal) { - -var PDFJS = sharedGlobal.PDFJS; + return true; +} -var bidi = PDFJS.bidi = (function bidiClosure() { - // Character types for symbols from 0000 to 00FF. - var baseTypes = [ - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'S', 'B', 'S', 'WS', - 'B', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'BN', 'B', 'B', 'B', 'S', 'WS', 'ON', 'ON', 'ET', 'ET', 'ET', 'ON', - 'ON', 'ON', 'ON', 'ON', 'ON', 'CS', 'ON', 'CS', 'ON', 'EN', 'EN', 'EN', - 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'EN', 'ON', 'ON', 'ON', 'ON', 'ON', - 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'ON', 'ON', - 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'ON', 'ON', 'ON', 'ON', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'B', 'BN', - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', 'BN', - 'BN', 'CS', 'ON', 'ET', 'ET', 'ET', 'ET', 'ON', 'ON', 'ON', 'ON', 'L', 'ON', - 'ON', 'ON', 'ON', 'ON', 'ET', 'ET', 'EN', 'EN', 'ON', 'L', 'ON', 'ON', 'ON', - 'EN', 'L', 'ON', 'ON', 'ON', 'ON', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L', - 'L', 'L', 'L', 'ON', 'L', 'L', 'L', 'L', 'L', 'L', 'L', 'L' - ]; +function isBool(v) { + return typeof v === 'boolean'; +} - // Character types for symbols from 0600 to 06FF - var arabicTypes = [ - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'CS', 'AL', 'ON', 'ON', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', - 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', 'AN', - 'AN', 'ET', 'AN', 'AN', 'AL', 'AL', 'AL', 'NSM', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', - 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'NSM', 'ON', 'NSM', - 'NSM', 'NSM', 'NSM', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', - 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL', 'AL' - ]; +function isInt(v) { + return typeof v === 'number' && ((v | 0) === v); +} - function isOdd(i) { - return (i & 1) !== 0; - } +function isNum(v) { + return typeof v === 'number'; +} - function isEven(i) { - return (i & 1) === 0; - } +function isString(v) { + return typeof v === 'string'; +} - function findUnequal(arr, start, value) { - for (var j = start, jj = arr.length; j < jj; ++j) { - if (arr[j] !== value) { - return j; - } - } - return j; - } +function isArray(v) { + return v instanceof Array; +} - function setValues(arr, start, end, value) { - for (var j = start; j < end; ++j) { - arr[j] = value; - } - } +function isArrayBuffer(v) { + return typeof v === 'object' && v !== null && v.byteLength !== undefined; +} - function reverseValues(arr, start, end) { - for (var i = start, j = end - 1; i < j; ++i, --j) { - var temp = arr[i]; - arr[i] = arr[j]; - arr[j] = temp; - } - } +/** + * Promise Capability object. + * + * @typedef {Object} PromiseCapability + * @property {Promise} promise - A promise object. + * @property {function} resolve - Fullfills the promise. + * @property {function} reject - Rejects the promise. + */ - function createBidiText(str, isLTR, vertical) { - return { - str: str, - dir: (vertical ? 'ttb' : (isLTR ? 'ltr' : 'rtl')) - }; - } +/** + * Creates a promise capability object. + * @alias PDFJS.createPromiseCapability + * + * @return {PromiseCapability} A capability object contains: + * - a Promise, resolve and reject methods. + */ +function createPromiseCapability() { + var capability = {}; + capability.promise = new Promise(function (resolve, reject) { + capability.resolve = resolve; + capability.reject = reject; + }); + return capability; +} - // These are used in bidi(), which is called frequently. We re-use them on - // each call to avoid unnecessary allocations. - var chars = []; - var types = []; +PDFJS.createPromiseCapability = createPromiseCapability; - function bidi(str, startLevel, vertical) { - var isLTR = true; - var strLength = str.length; - if (strLength === 0 || vertical) { - return createBidiText(str, isLTR, vertical); +/** + * Polyfill for Promises: + * The following promise implementation tries to generally implement the + * Promise/A+ spec. Some notable differences from other promise libaries are: + * - There currently isn't a seperate deferred and promise object. + * - Unhandled rejections eventually show an error if they aren't handled. + * + * Based off of the work in: + * https://bugzilla.mozilla.org/show_bug.cgi?id=810490 + */ +(function PromiseClosure() { + if (globalScope.Promise) { + // Promises existing in the DOM/Worker, checking presence of all/resolve + if (typeof globalScope.Promise.all !== 'function') { + globalScope.Promise.all = function (iterable) { + var count = 0, results = [], resolve, reject; + var promise = new globalScope.Promise(function (resolve_, reject_) { + resolve = resolve_; + reject = reject_; + }); + iterable.forEach(function (p, i) { + count++; + p.then(function (result) { + results[i] = result; + count--; + if (count === 0) { + resolve(results); + } + }, reject); + }); + if (count === 0) { + resolve(results); + } + return promise; + }; + } + if (typeof globalScope.Promise.resolve !== 'function') { + globalScope.Promise.resolve = function (value) { + return new globalScope.Promise(function (resolve) { resolve(value); }); + }; + } + if (typeof globalScope.Promise.reject !== 'function') { + globalScope.Promise.reject = function (reason) { + return new globalScope.Promise(function (resolve, reject) { + reject(reason); + }); + }; + } + if (typeof globalScope.Promise.prototype.catch !== 'function') { + globalScope.Promise.prototype.catch = function (onReject) { + return globalScope.Promise.prototype.then(undefined, onReject); + }; } + return; + } + var STATUS_PENDING = 0; + var STATUS_RESOLVED = 1; + var STATUS_REJECTED = 2; - // Get types and fill arrays - chars.length = strLength; - types.length = strLength; - var numBidi = 0; + // In an attempt to avoid silent exceptions, unhandled rejections are + // tracked and if they aren't handled in a certain amount of time an + // error is logged. + var REJECTION_TIMEOUT = 500; - var i, ii; - for (i = 0; i < strLength; ++i) { - chars[i] = str.charAt(i); + var HandlerManager = { + handlers: [], + running: false, + unhandledRejections: [], + pendingRejectionCheck: false, - var charCode = str.charCodeAt(i); - var charType = 'L'; - if (charCode <= 0x00ff) { - charType = baseTypes[charCode]; - } else if (0x0590 <= charCode && charCode <= 0x05f4) { - charType = 'R'; - } else if (0x0600 <= charCode && charCode <= 0x06ff) { - charType = arabicTypes[charCode & 0xff]; - } else if (0x0700 <= charCode && charCode <= 0x08AC) { - charType = 'AL'; - } - if (charType === 'R' || charType === 'AL' || charType === 'AN') { - numBidi++; + scheduleHandlers: function scheduleHandlers(promise) { + if (promise._status === STATUS_PENDING) { + return; } - types[i] = charType; - } - // Detect the bidi method - // - If there are no rtl characters then no bidi needed - // - If less than 30% chars are rtl then string is primarily ltr - // - If more than 30% chars are rtl then string is primarily rtl - if (numBidi === 0) { - isLTR = true; - return createBidiText(str, isLTR); - } + this.handlers = this.handlers.concat(promise._handlers); + promise._handlers = []; - if (startLevel === -1) { - if ((strLength / numBidi) < 0.3) { - isLTR = true; - startLevel = 0; - } else { - isLTR = false; - startLevel = 1; + if (this.running) { + return; } - } + this.running = true; - var levels = []; - for (i = 0; i < strLength; ++i) { - levels[i] = startLevel; - } + setTimeout(this.runHandlers.bind(this), 0); + }, - /* - X1-X10: skip most of this, since we are NOT doing the embeddings. - */ - var e = (isOdd(startLevel) ? 'R' : 'L'); - var sor = e; - var eor = sor; + runHandlers: function runHandlers() { + var RUN_TIMEOUT = 1; // ms + var timeoutAt = Date.now() + RUN_TIMEOUT; + while (this.handlers.length > 0) { + var handler = this.handlers.shift(); - /* - W1. Examine each non-spacing mark (NSM) in the level run, and change the - type of the NSM to the type of the previous character. If the NSM is at the - start of the level run, it will get the type of sor. - */ - var lastType = sor; - for (i = 0; i < strLength; ++i) { - if (types[i] === 'NSM') { - types[i] = lastType; - } else { - lastType = types[i]; - } - } + var nextStatus = handler.thisPromise._status; + var nextValue = handler.thisPromise._value; - /* - W2. Search backwards from each instance of a European number until the - first strong type (R, L, AL, or sor) is found. If an AL is found, change - the type of the European number to Arabic number. - */ - lastType = sor; - var t; - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'EN') { - types[i] = (lastType === 'AL') ? 'AN' : 'EN'; - } else if (t === 'R' || t === 'L' || t === 'AL') { - lastType = t; - } - } + try { + if (nextStatus === STATUS_RESOLVED) { + if (typeof handler.onResolve === 'function') { + nextValue = handler.onResolve(nextValue); + } + } else if (typeof handler.onReject === 'function') { + nextValue = handler.onReject(nextValue); + nextStatus = STATUS_RESOLVED; - /* - W3. Change all ALs to R. - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'AL') { - types[i] = 'R'; + if (handler.thisPromise._unhandledRejection) { + this.removeUnhandeledRejection(handler.thisPromise); + } + } + } catch (ex) { + nextStatus = STATUS_REJECTED; + nextValue = ex; + } + + handler.nextPromise._updateStatus(nextStatus, nextValue); + if (Date.now() >= timeoutAt) { + break; + } } - } - /* - W4. A single European separator between two European numbers changes to a - European number. A single common separator between two numbers of the same - type changes to that type: - */ - for (i = 1; i < strLength - 1; ++i) { - if (types[i] === 'ES' && types[i - 1] === 'EN' && types[i + 1] === 'EN') { - types[i] = 'EN'; + if (this.handlers.length > 0) { + setTimeout(this.runHandlers.bind(this), 0); + return; } - if (types[i] === 'CS' && - (types[i - 1] === 'EN' || types[i - 1] === 'AN') && - types[i + 1] === types[i - 1]) { - types[i] = types[i - 1]; + + this.running = false; + }, + + addUnhandledRejection: function addUnhandledRejection(promise) { + this.unhandledRejections.push({ + promise: promise, + time: Date.now() + }); + this.scheduleRejectionCheck(); + }, + + removeUnhandeledRejection: function removeUnhandeledRejection(promise) { + promise._unhandledRejection = false; + for (var i = 0; i < this.unhandledRejections.length; i++) { + if (this.unhandledRejections[i].promise === promise) { + this.unhandledRejections.splice(i); + i--; + } } - } + }, - /* - W5. A sequence of European terminators adjacent to European numbers changes - to all European numbers: - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'EN') { - // do before - var j; - for (j = i - 1; j >= 0; --j) { - if (types[j] !== 'ET') { - break; + scheduleRejectionCheck: function scheduleRejectionCheck() { + if (this.pendingRejectionCheck) { + return; + } + this.pendingRejectionCheck = true; + setTimeout(function rejectionCheck() { + this.pendingRejectionCheck = false; + var now = Date.now(); + for (var i = 0; i < this.unhandledRejections.length; i++) { + if (now - this.unhandledRejections[i].time > REJECTION_TIMEOUT) { + var unhandled = this.unhandledRejections[i].promise._value; + var msg = 'Unhandled rejection: ' + unhandled; + if (unhandled.stack) { + msg += '\n' + unhandled.stack; + } + warn(msg); + this.unhandledRejections.splice(i); + i--; } - types[j] = 'EN'; } - // do after - for (j = i + 1; j < strLength; --j) { - if (types[j] !== 'ET') { - break; - } - types[j] = 'EN'; + if (this.unhandledRejections.length) { + this.scheduleRejectionCheck(); } - } + }.bind(this), REJECTION_TIMEOUT); } + }; - /* - W6. Otherwise, separators and terminators change to Other Neutral: - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'WS' || t === 'ES' || t === 'ET' || t === 'CS') { - types[i] = 'ON'; + function Promise(resolver) { + this._status = STATUS_PENDING; + this._handlers = []; + try { + resolver.call(this, this._resolve.bind(this), this._reject.bind(this)); + } catch (e) { + this._reject(e); + } + } + /** + * Builds a promise that is resolved when all the passed in promises are + * resolved. + * @param {array} array of data and/or promises to wait for. + * @return {Promise} New dependant promise. + */ + Promise.all = function Promise_all(promises) { + var resolveAll, rejectAll; + var deferred = new Promise(function (resolve, reject) { + resolveAll = resolve; + rejectAll = reject; + }); + var unresolved = promises.length; + var results = []; + if (unresolved === 0) { + resolveAll(results); + return deferred; + } + function reject(reason) { + if (deferred._status === STATUS_REJECTED) { + return; } + results = []; + rejectAll(reason); } - - /* - W7. Search backwards from each instance of a European number until the - first strong type (R, L, or sor) is found. If an L is found, then change - the type of the European number to L. - */ - lastType = sor; - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (t === 'EN') { - types[i] = ((lastType === 'L') ? 'L' : 'EN'); - } else if (t === 'R' || t === 'L') { - lastType = t; + for (var i = 0, ii = promises.length; i < ii; ++i) { + var promise = promises[i]; + var resolve = (function(i) { + return function(value) { + if (deferred._status === STATUS_REJECTED) { + return; + } + results[i] = value; + unresolved--; + if (unresolved === 0) { + resolveAll(results); + } + }; + })(i); + if (Promise.isPromise(promise)) { + promise.then(resolve, reject); + } else { + resolve(promise); } } + return deferred; + }; - /* - N1. A sequence of neutrals takes the direction of the surrounding strong - text if the text on both sides has the same direction. European and Arabic - numbers are treated as though they were R. Start-of-level-run (sor) and - end-of-level-run (eor) are used at level run boundaries. - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'ON') { - var end = findUnequal(types, i + 1, 'ON'); - var before = sor; - if (i > 0) { - before = types[i - 1]; - } + /** + * Checks if the value is likely a promise (has a 'then' function). + * @return {boolean} true if value is thenable + */ + Promise.isPromise = function Promise_isPromise(value) { + return value && typeof value.then === 'function'; + }; - var after = eor; - if (end + 1 < strLength) { - after = types[end + 1]; - } - if (before !== 'L') { - before = 'R'; - } - if (after !== 'L') { - after = 'R'; - } - if (before === after) { - setValues(types, i, end, before); - } - i = end - 1; // reset to end (-1 so next iteration is ok) + /** + * Creates resolved promise + * @param value resolve value + * @returns {Promise} + */ + Promise.resolve = function Promise_resolve(value) { + return new Promise(function (resolve) { resolve(value); }); + }; + + /** + * Creates rejected promise + * @param reason rejection value + * @returns {Promise} + */ + Promise.reject = function Promise_reject(reason) { + return new Promise(function (resolve, reject) { reject(reason); }); + }; + + Promise.prototype = { + _status: null, + _value: null, + _handlers: null, + _unhandledRejection: null, + + _updateStatus: function Promise__updateStatus(status, value) { + if (this._status === STATUS_RESOLVED || + this._status === STATUS_REJECTED) { + return; } - } - /* - N2. Any remaining neutrals take the embedding direction. - */ - for (i = 0; i < strLength; ++i) { - if (types[i] === 'ON') { - types[i] = e; + if (status === STATUS_RESOLVED && + Promise.isPromise(value)) { + value.then(this._updateStatus.bind(this, STATUS_RESOLVED), + this._updateStatus.bind(this, STATUS_REJECTED)); + return; } - } - /* - I1. For all characters with an even (left-to-right) embedding direction, - those of type R go up one level and those of type AN or EN go up two - levels. - I2. For all characters with an odd (right-to-left) embedding direction, - those of type L, EN or AN go up one level. - */ - for (i = 0; i < strLength; ++i) { - t = types[i]; - if (isEven(levels[i])) { - if (t === 'R') { - levels[i] += 1; - } else if (t === 'AN' || t === 'EN') { - levels[i] += 2; - } - } else { // isOdd - if (t === 'L' || t === 'AN' || t === 'EN') { - levels[i] += 1; - } + this._status = status; + this._value = value; + + if (status === STATUS_REJECTED && this._handlers.length === 0) { + this._unhandledRejection = true; + HandlerManager.addUnhandledRejection(this); } - } - /* - L1. On each line, reset the embedding level of the following characters to - the paragraph embedding level: + HandlerManager.scheduleHandlers(this); + }, - segment separators, - paragraph separators, - any sequence of whitespace characters preceding a segment separator or - paragraph separator, and any sequence of white space characters at the end - of the line. - */ + _resolve: function Promise_resolve(value) { + this._updateStatus(STATUS_RESOLVED, value); + }, - // don't bother as text is only single line + _reject: function Promise_reject(reason) { + this._updateStatus(STATUS_REJECTED, reason); + }, - /* - L2. From the highest level found in the text to the lowest odd level on - each line, reverse any contiguous sequence of characters that are at that - level or higher. - */ + then: function Promise_then(onResolve, onReject) { + var nextPromise = new Promise(function (resolve, reject) { + this.resolve = resolve; + this.reject = reject; + }); + this._handlers.push({ + thisPromise: this, + onResolve: onResolve, + onReject: onReject, + nextPromise: nextPromise + }); + HandlerManager.scheduleHandlers(this); + return nextPromise; + }, - // find highest level & lowest odd level - var highestLevel = -1; - var lowestOddLevel = 99; - var level; - for (i = 0, ii = levels.length; i < ii; ++i) { - level = levels[i]; - if (highestLevel < level) { - highestLevel = level; - } - if (lowestOddLevel > level && isOdd(level)) { - lowestOddLevel = level; - } + catch: function Promise_catch(onReject) { + return this.then(undefined, onReject); } + }; - // now reverse between those limits - for (level = highestLevel; level >= lowestOddLevel; --level) { - // find segments to reverse - var start = -1; - for (i = 0, ii = levels.length; i < ii; ++i) { - if (levels[i] < level) { - if (start >= 0) { - reverseValues(chars, start, i); - start = -1; - } - } else if (start < 0) { - start = i; + globalScope.Promise = Promise; +})(); + +var StatTimer = (function StatTimerClosure() { + function rpad(str, pad, length) { + while (str.length < length) { + str += pad; + } + return str; + } + function StatTimer() { + this.started = {}; + this.times = []; + this.enabled = true; + } + StatTimer.prototype = { + time: function StatTimer_time(name) { + if (!this.enabled) { + return; + } + if (name in this.started) { + warn('Timer is already running for ' + name); + } + this.started[name] = Date.now(); + }, + timeEnd: function StatTimer_timeEnd(name) { + if (!this.enabled) { + return; + } + if (!(name in this.started)) { + warn('Timer has not been started for ' + name); + } + this.times.push({ + 'name': name, + 'start': this.started[name], + 'end': Date.now() + }); + // Remove timer from started so it can be called again. + delete this.started[name]; + }, + toString: function StatTimer_toString() { + var i, ii; + var times = this.times; + var out = ''; + // Find the longest name for padding purposes. + var longest = 0; + for (i = 0, ii = times.length; i < ii; ++i) { + var name = times[i]['name']; + if (name.length > longest) { + longest = name.length; } } - if (start >= 0) { - reverseValues(chars, start, levels.length); + for (i = 0, ii = times.length; i < ii; ++i) { + var span = times[i]; + var duration = span.end - span.start; + out += rpad(span['name'], ' ', longest) + ' ' + duration + 'ms\n'; } + return out; } + }; + return StatTimer; +})(); - /* - L3. Combining marks applied to a right-to-left base character will at this - point precede their base character. If the rendering engine expects them to - follow the base characters in the final display process, then the ordering - of the marks and the base character must be reversed. - */ +PDFJS.createBlob = function createBlob(data, contentType) { + if (typeof Blob !== 'undefined') { + return new Blob([data], { type: contentType }); + } + // Blob builder is deprecated in FF14 and removed in FF18. + var bb = new MozBlobBuilder(); + bb.append(data); + return bb.getBlob(contentType); +}; - // don't bother for now +PDFJS.createObjectURL = (function createObjectURLClosure() { + // Blob/createObjectURL is not available, falling back to data schema. + var digits = + 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/='; - /* - L4. A character that possesses the mirrored property as specified by - Section 4.7, Mirrored, must be depicted by a mirrored glyph if the resolved - directionality of that character is R. - */ + return function createObjectURL(data, contentType) { + if (!PDFJS.disableCreateObjectURL && + typeof URL !== 'undefined' && URL.createObjectURL) { + var blob = PDFJS.createBlob(data, contentType); + return URL.createObjectURL(blob); + } - // don't mirror as characters are already mirrored in the pdf + var buffer = 'data:' + contentType + ';base64,'; + for (var i = 0, ii = data.length; i < ii; i += 3) { + var b1 = data[i] & 0xFF; + var b2 = data[i + 1] & 0xFF; + var b3 = data[i + 2] & 0xFF; + var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4); + var d3 = i + 1 < ii ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64; + var d4 = i + 2 < ii ? (b3 & 0x3F) : 64; + buffer += digits[d1] + digits[d2] + digits[d3] + digits[d4]; + } + return buffer; + }; +})(); - // Finally, return string - for (i = 0, ii = chars.length; i < ii; ++i) { - var ch = chars[i]; - if (ch === '<' || ch === '>') { - chars[i] = ''; +function MessageHandler(sourceName, targetName, comObj) { + this.sourceName = sourceName; + this.targetName = targetName; + this.comObj = comObj; + this.callbackIndex = 1; + this.postMessageTransfers = true; + var callbacksCapabilities = this.callbacksCapabilities = {}; + var ah = this.actionHandler = {}; + + this._onComObjOnMessage = function messageHandlerComObjOnMessage(event) { + var data = event.data; + if (data.targetName !== this.sourceName) { + return; + } + if (data.isReply) { + var callbackId = data.callbackId; + if (data.callbackId in callbacksCapabilities) { + var callback = callbacksCapabilities[callbackId]; + delete callbacksCapabilities[callbackId]; + if ('error' in data) { + callback.reject(data.error); + } else { + callback.resolve(data.data); + } + } else { + error('Cannot resolve callback ' + callbackId); + } + } else if (data.action in ah) { + var action = ah[data.action]; + if (data.callbackId) { + var sourceName = this.sourceName; + var targetName = data.sourceName; + Promise.resolve().then(function () { + return action[0].call(action[1], data.data); + }).then(function (result) { + comObj.postMessage({ + sourceName: sourceName, + targetName: targetName, + isReply: true, + callbackId: data.callbackId, + data: result + }); + }, function (reason) { + if (reason instanceof Error) { + // Serialize error to avoid "DataCloneError" + reason = reason + ''; + } + comObj.postMessage({ + sourceName: sourceName, + targetName: targetName, + isReply: true, + callbackId: data.callbackId, + error: reason + }); + }); + } else { + action[0].call(action[1], data.data); } + } else { + error('Unknown action from worker: ' + data.action); } - return createBidiText(chars.join(''), isLTR); + }.bind(this); + comObj.addEventListener('message', this._onComObjOnMessage); +} + +MessageHandler.prototype = { + on: function messageHandlerOn(actionName, handler, scope) { + var ah = this.actionHandler; + if (ah[actionName]) { + error('There is already an actionName called "' + actionName + '"'); + } + ah[actionName] = [handler, scope]; + }, + /** + * Sends a message to the comObj to invoke the action with the supplied data. + * @param {String} actionName Action to call. + * @param {JSON} data JSON data to send. + * @param {Array} [transfers] Optional list of transfers/ArrayBuffers + */ + send: function messageHandlerSend(actionName, data, transfers) { + var message = { + sourceName: this.sourceName, + targetName: this.targetName, + action: actionName, + data: data + }; + this.postMessage(message, transfers); + }, + /** + * Sends a message to the comObj to invoke the action with the supplied data. + * Expects that other side will callback with the response. + * @param {String} actionName Action to call. + * @param {JSON} data JSON data to send. + * @param {Array} [transfers] Optional list of transfers/ArrayBuffers. + * @returns {Promise} Promise to be resolved with response data. + */ + sendWithPromise: + function messageHandlerSendWithPromise(actionName, data, transfers) { + var callbackId = this.callbackIndex++; + var message = { + sourceName: this.sourceName, + targetName: this.targetName, + action: actionName, + data: data, + callbackId: callbackId + }; + var capability = createPromiseCapability(); + this.callbacksCapabilities[callbackId] = capability; + try { + this.postMessage(message, transfers); + } catch (e) { + capability.reject(e); + } + return capability.promise; + }, + /** + * Sends raw message to the comObj. + * @private + * @param message {Object} Raw message. + * @param transfers List of transfers/ArrayBuffers, or undefined. + */ + postMessage: function (message, transfers) { + if (transfers && this.postMessageTransfers) { + this.comObj.postMessage(message, transfers); + } else { + this.comObj.postMessage(message); + } + }, + + destroy: function () { + this.comObj.removeEventListener('message', this._onComObjOnMessage); } +}; - return bidi; -})(); +function loadJpegStream(id, imageUrl, objs) { + var img = new Image(); + img.onload = (function loadJpegStream_onloadClosure() { + objs.resolve(id, img); + }); + img.onerror = (function loadJpegStream_onerrorClosure() { + objs.resolve(id, null); + warn('Error during JPEG image loading'); + }); + img.src = imageUrl; +} -exports.bidi = bidi; +exports.FONT_IDENTITY_MATRIX = FONT_IDENTITY_MATRIX; +exports.IDENTITY_MATRIX = IDENTITY_MATRIX; +exports.OPS = OPS; +exports.UNSUPPORTED_FEATURES = UNSUPPORTED_FEATURES; +exports.AnnotationBorderStyleType = AnnotationBorderStyleType; +exports.AnnotationFlag = AnnotationFlag; +exports.AnnotationType = AnnotationType; +exports.FontType = FontType; +exports.ImageKind = ImageKind; +exports.InvalidPDFException = InvalidPDFException; +exports.LinkTarget = LinkTarget; +exports.LinkTargetStringMap = LinkTargetStringMap; +exports.MessageHandler = MessageHandler; +exports.MissingDataException = MissingDataException; +exports.MissingPDFException = MissingPDFException; +exports.NotImplementedException = NotImplementedException; +exports.PasswordException = PasswordException; +exports.PasswordResponses = PasswordResponses; +exports.StatTimer = StatTimer; +exports.StreamType = StreamType; +exports.TextRenderingMode = TextRenderingMode; +exports.UnexpectedResponseException = UnexpectedResponseException; +exports.UnknownErrorException = UnknownErrorException; +exports.Util = Util; +exports.XRefParseException = XRefParseException; +exports.assert = assert; +exports.bytesToString = bytesToString; +exports.combineUrl = combineUrl; +exports.createPromiseCapability = createPromiseCapability; +exports.deprecated = deprecated; +exports.error = error; +exports.info = info; +exports.isArray = isArray; +exports.isArrayBuffer = isArrayBuffer; +exports.isBool = isBool; +exports.isEmptyObj = isEmptyObj; +exports.isExternalLinkTargetSet = isExternalLinkTargetSet; +exports.isInt = isInt; +exports.isNum = isNum; +exports.isString = isString; +exports.isValidUrl = isValidUrl; +exports.loadJpegStream = loadJpegStream; +exports.log2 = log2; +exports.readInt8 = readInt8; +exports.readUint16 = readUint16; +exports.readUint32 = readUint32; +exports.shadow = shadow; +exports.string32 = string32; +exports.stringToBytes = stringToBytes; +exports.stringToPDFString = stringToPDFString; +exports.stringToUTF8String = stringToUTF8String; +exports.utf8StringToString = utf8StringToString; +exports.warn = warn; })); @@ -40446,7 +40454,13 @@ var WorkerTask = (function WorkerTaskClosure() { var WorkerMessageHandler = PDFJS.WorkerMessageHandler = { setup: function wphSetup(handler, port) { + var testMessageProcessed = false; handler.on('test', function wphSetupTest(data) { + if (testMessageProcessed) { + return; // we already processed 'test' message once + } + testMessageProcessed = true; + // check if Uint8Array can be sent to worker if (!(data instanceof Uint8Array)) { handler.send('test', 'main', false); @@ -40973,51 +40987,55 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = { } }; -var consoleTimer = {}; - -var workerConsole = { - log: function log() { - var args = Array.prototype.slice.call(arguments); - globalScope.postMessage({ - targetName: 'main', - action: 'console_log', - data: args - }); - }, - - error: function error() { - var args = Array.prototype.slice.call(arguments); - globalScope.postMessage({ - targetName: 'main', - action: 'console_error', - data: args - }); - throw 'pdf.js execution error'; - }, +function initializeWorker() { + if (!('console' in globalScope)) { + var consoleTimer = {}; + + var workerConsole = { + log: function log() { + var args = Array.prototype.slice.call(arguments); + globalScope.postMessage({ + targetName: 'main', + action: 'console_log', + data: args + }); + }, - time: function time(name) { - consoleTimer[name] = Date.now(); - }, + error: function error() { + var args = Array.prototype.slice.call(arguments); + globalScope.postMessage({ + targetName: 'main', + action: 'console_error', + data: args + }); + throw 'pdf.js execution error'; + }, - timeEnd: function timeEnd(name) { - var time = consoleTimer[name]; - if (!time) { - error('Unknown timer name ' + name); - } - this.log('Timer:', name, Date.now() - time); - } -}; + time: function time(name) { + consoleTimer[name] = Date.now(); + }, + timeEnd: function timeEnd(name) { + var time = consoleTimer[name]; + if (!time) { + error('Unknown timer name ' + name); + } + this.log('Timer:', name, Date.now() - time); + } + }; -// Worker thread? -if (typeof window === 'undefined' && - !(typeof module !== 'undefined' && module.require)) { - if (!('console' in globalScope)) { globalScope.console = workerConsole; } var handler = new MessageHandler('worker', 'main', self); WorkerMessageHandler.setup(handler, self); + handler.send('ready', null); +} + +// Worker thread (and not node.js)? +if (typeof window === 'undefined' && + !(typeof module !== 'undefined' && module.require)) { + initializeWorker(); } exports.WorkerTask = WorkerTask; diff --git a/package.json b/package.json index 169edd86c..31ea2bca5 100644 --- a/package.json +++ b/package.json @@ -1,6 +1,6 @@ { "name": "pdfjs-dist", - "version": "1.3.137", + "version": "1.3.142", "main": "build/pdf.js", "description": "Generic build of Mozilla's PDF.js library.", "keywords": [ diff --git a/web/pdf_viewer.js b/web/pdf_viewer.js index d919a01c5..18995dbf7 100644 --- a/web/pdf_viewer.js +++ b/web/pdf_viewer.js @@ -904,8 +904,6 @@ var TEXT_LAYER_RENDER_DELAY = 200; // ms * @implements {IRenderableView} */ var PDFPageView = (function PDFPageViewClosure() { - var CustomStyle = PDFJS.CustomStyle; - /** * @constructs PDFPageView * @param {PDFPageViewOptions} options @@ -1079,6 +1077,8 @@ var PDFPageView = (function PDFPageViewClosure() { }, cssTransform: function PDFPageView_transform(canvas, redrawAnnotations) { + var CustomStyle = PDFJS.CustomStyle; + // Scale canvas, canvas wrapper, and page container. var width = this.viewport.width; var height = this.viewport.height; @@ -1374,6 +1374,7 @@ var PDFPageView = (function PDFPageViewClosure() { }, beforePrint: function PDFPageView_beforePrint() { + var CustomStyle = PDFJS.CustomStyle; var pdfPage = this.pdfPage; var viewport = pdfPage.getViewport(1);