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1644 lines
58 KiB
1644 lines
58 KiB
/* Copyright 2016 Mozilla Foundation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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|
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import { |
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assert, bytesToString, error, info, isArray, stringToBytes, Util, warn |
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} from '../shared/util'; |
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import { |
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ExpertCharset, ExpertSubsetCharset, ISOAdobeCharset |
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} from './charsets'; |
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import { ExpertEncoding, StandardEncoding } from './encodings'; |
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|
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// Maximum subroutine call depth of type 2 chartrings. Matches OTS. |
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var MAX_SUBR_NESTING = 10; |
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|
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/** |
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* The CFF class takes a Type1 file and wrap it into a |
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* 'Compact Font Format' which itself embed Type2 charstrings. |
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*/ |
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var CFFStandardStrings = [ |
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'.notdef', 'space', 'exclam', 'quotedbl', 'numbersign', 'dollar', 'percent', |
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'ampersand', 'quoteright', 'parenleft', 'parenright', 'asterisk', 'plus', |
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'comma', 'hyphen', 'period', 'slash', 'zero', 'one', 'two', 'three', 'four', |
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'five', 'six', 'seven', 'eight', 'nine', 'colon', 'semicolon', 'less', |
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'equal', 'greater', 'question', 'at', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', |
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'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', |
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'X', 'Y', 'Z', 'bracketleft', 'backslash', 'bracketright', 'asciicircum', |
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'underscore', 'quoteleft', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', |
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'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', |
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'z', 'braceleft', 'bar', 'braceright', 'asciitilde', 'exclamdown', 'cent', |
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'sterling', 'fraction', 'yen', 'florin', 'section', 'currency', |
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'quotesingle', 'quotedblleft', 'guillemotleft', 'guilsinglleft', |
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'guilsinglright', 'fi', 'fl', 'endash', 'dagger', 'daggerdbl', |
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'periodcentered', 'paragraph', 'bullet', 'quotesinglbase', 'quotedblbase', |
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'quotedblright', 'guillemotright', 'ellipsis', 'perthousand', 'questiondown', |
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'grave', 'acute', 'circumflex', 'tilde', 'macron', 'breve', 'dotaccent', |
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'dieresis', 'ring', 'cedilla', 'hungarumlaut', 'ogonek', 'caron', 'emdash', |
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'AE', 'ordfeminine', 'Lslash', 'Oslash', 'OE', 'ordmasculine', 'ae', |
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'dotlessi', 'lslash', 'oslash', 'oe', 'germandbls', 'onesuperior', |
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'logicalnot', 'mu', 'trademark', 'Eth', 'onehalf', 'plusminus', 'Thorn', |
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'onequarter', 'divide', 'brokenbar', 'degree', 'thorn', 'threequarters', |
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'twosuperior', 'registered', 'minus', 'eth', 'multiply', 'threesuperior', |
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'copyright', 'Aacute', 'Acircumflex', 'Adieresis', 'Agrave', 'Aring', |
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'Atilde', 'Ccedilla', 'Eacute', 'Ecircumflex', 'Edieresis', 'Egrave', |
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'Iacute', 'Icircumflex', 'Idieresis', 'Igrave', 'Ntilde', 'Oacute', |
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'Ocircumflex', 'Odieresis', 'Ograve', 'Otilde', 'Scaron', 'Uacute', |
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'Ucircumflex', 'Udieresis', 'Ugrave', 'Yacute', 'Ydieresis', 'Zcaron', |
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'aacute', 'acircumflex', 'adieresis', 'agrave', 'aring', 'atilde', |
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'ccedilla', 'eacute', 'ecircumflex', 'edieresis', 'egrave', 'iacute', |
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'icircumflex', 'idieresis', 'igrave', 'ntilde', 'oacute', 'ocircumflex', |
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'odieresis', 'ograve', 'otilde', 'scaron', 'uacute', 'ucircumflex', |
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'udieresis', 'ugrave', 'yacute', 'ydieresis', 'zcaron', 'exclamsmall', |
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'Hungarumlautsmall', 'dollaroldstyle', 'dollarsuperior', 'ampersandsmall', |
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'Acutesmall', 'parenleftsuperior', 'parenrightsuperior', 'twodotenleader', |
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'onedotenleader', 'zerooldstyle', 'oneoldstyle', 'twooldstyle', |
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'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle', |
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'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', 'commasuperior', |
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'threequartersemdash', 'periodsuperior', 'questionsmall', 'asuperior', |
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'bsuperior', 'centsuperior', 'dsuperior', 'esuperior', 'isuperior', |
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'lsuperior', 'msuperior', 'nsuperior', 'osuperior', 'rsuperior', 'ssuperior', |
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'tsuperior', 'ff', 'ffi', 'ffl', 'parenleftinferior', 'parenrightinferior', |
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'Circumflexsmall', 'hyphensuperior', 'Gravesmall', 'Asmall', 'Bsmall', |
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'Csmall', 'Dsmall', 'Esmall', 'Fsmall', 'Gsmall', 'Hsmall', 'Ismall', |
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'Jsmall', 'Ksmall', 'Lsmall', 'Msmall', 'Nsmall', 'Osmall', 'Psmall', |
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'Qsmall', 'Rsmall', 'Ssmall', 'Tsmall', 'Usmall', 'Vsmall', 'Wsmall', |
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'Xsmall', 'Ysmall', 'Zsmall', 'colonmonetary', 'onefitted', 'rupiah', |
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'Tildesmall', 'exclamdownsmall', 'centoldstyle', 'Lslashsmall', |
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'Scaronsmall', 'Zcaronsmall', 'Dieresissmall', 'Brevesmall', 'Caronsmall', |
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'Dotaccentsmall', 'Macronsmall', 'figuredash', 'hypheninferior', |
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'Ogoneksmall', 'Ringsmall', 'Cedillasmall', 'questiondownsmall', 'oneeighth', |
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'threeeighths', 'fiveeighths', 'seveneighths', 'onethird', 'twothirds', |
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'zerosuperior', 'foursuperior', 'fivesuperior', 'sixsuperior', |
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'sevensuperior', 'eightsuperior', 'ninesuperior', 'zeroinferior', |
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'oneinferior', 'twoinferior', 'threeinferior', 'fourinferior', |
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'fiveinferior', 'sixinferior', 'seveninferior', 'eightinferior', |
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'nineinferior', 'centinferior', 'dollarinferior', 'periodinferior', |
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'commainferior', 'Agravesmall', 'Aacutesmall', 'Acircumflexsmall', |
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'Atildesmall', 'Adieresissmall', 'Aringsmall', 'AEsmall', 'Ccedillasmall', |
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'Egravesmall', 'Eacutesmall', 'Ecircumflexsmall', 'Edieresissmall', |
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'Igravesmall', 'Iacutesmall', 'Icircumflexsmall', 'Idieresissmall', |
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'Ethsmall', 'Ntildesmall', 'Ogravesmall', 'Oacutesmall', 'Ocircumflexsmall', |
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'Otildesmall', 'Odieresissmall', 'OEsmall', 'Oslashsmall', 'Ugravesmall', |
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'Uacutesmall', 'Ucircumflexsmall', 'Udieresissmall', 'Yacutesmall', |
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'Thornsmall', 'Ydieresissmall', '001.000', '001.001', '001.002', '001.003', |
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'Black', 'Bold', 'Book', 'Light', 'Medium', 'Regular', 'Roman', 'Semibold' |
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]; |
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var CFFParser = (function CFFParserClosure() { |
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var CharstringValidationData = [ |
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null, |
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{ id: 'hstem', min: 2, stackClearing: true, stem: true, }, |
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null, |
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{ id: 'vstem', min: 2, stackClearing: true, stem: true, }, |
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{ id: 'vmoveto', min: 1, stackClearing: true, }, |
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{ id: 'rlineto', min: 2, resetStack: true, }, |
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{ id: 'hlineto', min: 1, resetStack: true, }, |
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{ id: 'vlineto', min: 1, resetStack: true, }, |
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{ id: 'rrcurveto', min: 6, resetStack: true, }, |
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null, |
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{ id: 'callsubr', min: 1, undefStack: true, }, |
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{ id: 'return', min: 0, undefStack: true, }, |
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null, // 12 |
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null, |
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{ id: 'endchar', min: 0, stackClearing: true, }, |
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null, |
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null, |
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null, |
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{ id: 'hstemhm', min: 2, stackClearing: true, stem: true, }, |
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{ id: 'hintmask', min: 0, stackClearing: true, }, |
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{ id: 'cntrmask', min: 0, stackClearing: true, }, |
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{ id: 'rmoveto', min: 2, stackClearing: true, }, |
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{ id: 'hmoveto', min: 1, stackClearing: true, }, |
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{ id: 'vstemhm', min: 2, stackClearing: true, stem: true, }, |
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{ id: 'rcurveline', min: 8, resetStack: true, }, |
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{ id: 'rlinecurve', min: 8, resetStack: true, }, |
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{ id: 'vvcurveto', min: 4, resetStack: true, }, |
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{ id: 'hhcurveto', min: 4, resetStack: true, }, |
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null, // shortint |
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{ id: 'callgsubr', min: 1, undefStack: true, }, |
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{ id: 'vhcurveto', min: 4, resetStack: true, }, |
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{ id: 'hvcurveto', min: 4, resetStack: true, } |
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]; |
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var CharstringValidationData12 = [ |
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null, |
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null, |
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null, |
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{ id: 'and', min: 2, stackDelta: -1, }, |
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{ id: 'or', min: 2, stackDelta: -1, }, |
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{ id: 'not', min: 1, stackDelta: 0, }, |
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null, |
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null, |
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null, |
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{ id: 'abs', min: 1, stackDelta: 0, }, |
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{ id: 'add', min: 2, stackDelta: -1, |
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stackFn: function stack_div(stack, index) { |
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stack[index - 2] = stack[index - 2] + stack[index - 1]; |
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}, |
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}, |
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{ id: 'sub', min: 2, stackDelta: -1, |
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stackFn: function stack_div(stack, index) { |
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stack[index - 2] = stack[index - 2] - stack[index - 1]; |
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}, |
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}, |
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{ id: 'div', min: 2, stackDelta: -1, |
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stackFn: function stack_div(stack, index) { |
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stack[index - 2] = stack[index - 2] / stack[index - 1]; |
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}, |
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}, |
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null, |
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{ id: 'neg', min: 1, stackDelta: 0, |
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stackFn: function stack_div(stack, index) { |
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stack[index - 1] = -stack[index - 1]; |
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}, |
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}, |
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{ id: 'eq', min: 2, stackDelta: -1, }, |
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null, |
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null, |
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{ id: 'drop', min: 1, stackDelta: -1, }, |
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null, |
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{ id: 'put', min: 2, stackDelta: -2, }, |
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{ id: 'get', min: 1, stackDelta: 0, }, |
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{ id: 'ifelse', min: 4, stackDelta: -3, }, |
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{ id: 'random', min: 0, stackDelta: 1, }, |
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{ id: 'mul', min: 2, stackDelta: -1, |
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stackFn: function stack_div(stack, index) { |
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stack[index - 2] = stack[index - 2] * stack[index - 1]; |
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}, |
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}, |
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null, |
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{ id: 'sqrt', min: 1, stackDelta: 0, }, |
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{ id: 'dup', min: 1, stackDelta: 1, }, |
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{ id: 'exch', min: 2, stackDelta: 0, }, |
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{ id: 'index', min: 2, stackDelta: 0, }, |
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{ id: 'roll', min: 3, stackDelta: -2, }, |
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null, |
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null, |
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null, |
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{ id: 'hflex', min: 7, resetStack: true, }, |
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{ id: 'flex', min: 13, resetStack: true, }, |
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{ id: 'hflex1', min: 9, resetStack: true, }, |
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{ id: 'flex1', min: 11, resetStack: true, } |
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]; |
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|
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function CFFParser(file, properties, seacAnalysisEnabled) { |
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this.bytes = file.getBytes(); |
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this.properties = properties; |
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this.seacAnalysisEnabled = !!seacAnalysisEnabled; |
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} |
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CFFParser.prototype = { |
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parse: function CFFParser_parse() { |
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var properties = this.properties; |
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var cff = new CFF(); |
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this.cff = cff; |
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|
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// The first five sections must be in order, all the others are reached |
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// via offsets contained in one of the below. |
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var header = this.parseHeader(); |
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var nameIndex = this.parseIndex(header.endPos); |
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var topDictIndex = this.parseIndex(nameIndex.endPos); |
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var stringIndex = this.parseIndex(topDictIndex.endPos); |
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var globalSubrIndex = this.parseIndex(stringIndex.endPos); |
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|
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var topDictParsed = this.parseDict(topDictIndex.obj.get(0)); |
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var topDict = this.createDict(CFFTopDict, topDictParsed, cff.strings); |
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cff.header = header.obj; |
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cff.names = this.parseNameIndex(nameIndex.obj); |
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cff.strings = this.parseStringIndex(stringIndex.obj); |
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cff.topDict = topDict; |
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cff.globalSubrIndex = globalSubrIndex.obj; |
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this.parsePrivateDict(cff.topDict); |
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cff.isCIDFont = topDict.hasName('ROS'); |
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var charStringOffset = topDict.getByName('CharStrings'); |
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var charStringIndex = this.parseIndex(charStringOffset).obj; |
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|
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var fontMatrix = topDict.getByName('FontMatrix'); |
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if (fontMatrix) { |
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properties.fontMatrix = fontMatrix; |
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} |
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var fontBBox = topDict.getByName('FontBBox'); |
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if (fontBBox) { |
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// adjusting ascent/descent |
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properties.ascent = Math.max(fontBBox[3], fontBBox[1]); |
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properties.descent = Math.min(fontBBox[1], fontBBox[3]); |
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properties.ascentScaled = true; |
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} |
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|
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var charset, encoding; |
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if (cff.isCIDFont) { |
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var fdArrayIndex = this.parseIndex(topDict.getByName('FDArray')).obj; |
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for (var i = 0, ii = fdArrayIndex.count; i < ii; ++i) { |
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var dictRaw = fdArrayIndex.get(i); |
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var fontDict = this.createDict(CFFTopDict, this.parseDict(dictRaw), |
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cff.strings); |
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this.parsePrivateDict(fontDict); |
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cff.fdArray.push(fontDict); |
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} |
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// cid fonts don't have an encoding |
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encoding = null; |
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charset = this.parseCharsets(topDict.getByName('charset'), |
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charStringIndex.count, cff.strings, true); |
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cff.fdSelect = this.parseFDSelect(topDict.getByName('FDSelect'), |
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charStringIndex.count); |
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} else { |
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charset = this.parseCharsets(topDict.getByName('charset'), |
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charStringIndex.count, cff.strings, false); |
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encoding = this.parseEncoding(topDict.getByName('Encoding'), |
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properties, |
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cff.strings, charset.charset); |
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} |
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cff.charset = charset; |
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cff.encoding = encoding; |
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|
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var charStringsAndSeacs = this.parseCharStrings( |
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charStringIndex, |
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topDict.privateDict.subrsIndex, |
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globalSubrIndex.obj, |
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cff.fdSelect, |
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cff.fdArray); |
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cff.charStrings = charStringsAndSeacs.charStrings; |
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cff.seacs = charStringsAndSeacs.seacs; |
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cff.widths = charStringsAndSeacs.widths; |
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return cff; |
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}, |
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parseHeader: function CFFParser_parseHeader() { |
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var bytes = this.bytes; |
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var bytesLength = bytes.length; |
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var offset = 0; |
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|
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// Prevent an infinite loop, by checking that the offset is within the |
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// bounds of the bytes array. Necessary in empty, or invalid, font files. |
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while (offset < bytesLength && bytes[offset] !== 1) { |
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++offset; |
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} |
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if (offset >= bytesLength) { |
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error('Invalid CFF header'); |
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} else if (offset !== 0) { |
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info('cff data is shifted'); |
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bytes = bytes.subarray(offset); |
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this.bytes = bytes; |
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} |
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var major = bytes[0]; |
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var minor = bytes[1]; |
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var hdrSize = bytes[2]; |
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var offSize = bytes[3]; |
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var header = new CFFHeader(major, minor, hdrSize, offSize); |
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return { obj: header, endPos: hdrSize, }; |
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}, |
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parseDict: function CFFParser_parseDict(dict) { |
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var pos = 0; |
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|
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function parseOperand() { |
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var value = dict[pos++]; |
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if (value === 30) { |
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return parseFloatOperand(); |
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} else if (value === 28) { |
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value = dict[pos++]; |
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value = ((value << 24) | (dict[pos++] << 16)) >> 16; |
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return value; |
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} else if (value === 29) { |
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value = dict[pos++]; |
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value = (value << 8) | dict[pos++]; |
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value = (value << 8) | dict[pos++]; |
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value = (value << 8) | dict[pos++]; |
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return value; |
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} else if (value >= 32 && value <= 246) { |
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return value - 139; |
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} else if (value >= 247 && value <= 250) { |
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return ((value - 247) * 256) + dict[pos++] + 108; |
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} else if (value >= 251 && value <= 254) { |
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return -((value - 251) * 256) - dict[pos++] - 108; |
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} |
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warn('CFFParser_parseDict: "' + value + '" is a reserved command.'); |
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return NaN; |
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} |
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|
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function parseFloatOperand() { |
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var str = ''; |
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var eof = 15; |
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var lookup = ['0', '1', '2', '3', '4', '5', '6', '7', '8', |
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'9', '.', 'E', 'E-', null, '-']; |
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var length = dict.length; |
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while (pos < length) { |
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var b = dict[pos++]; |
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var b1 = b >> 4; |
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var b2 = b & 15; |
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|
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if (b1 === eof) { |
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break; |
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} |
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str += lookup[b1]; |
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|
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if (b2 === eof) { |
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break; |
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} |
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str += lookup[b2]; |
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} |
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return parseFloat(str); |
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} |
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|
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var operands = []; |
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var entries = []; |
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|
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pos = 0; |
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var end = dict.length; |
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while (pos < end) { |
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var b = dict[pos]; |
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if (b <= 21) { |
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if (b === 12) { |
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b = (b << 8) | dict[++pos]; |
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} |
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entries.push([b, operands]); |
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operands = []; |
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++pos; |
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} else { |
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operands.push(parseOperand()); |
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} |
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} |
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return entries; |
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}, |
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parseIndex: function CFFParser_parseIndex(pos) { |
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var cffIndex = new CFFIndex(); |
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var bytes = this.bytes; |
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var count = (bytes[pos++] << 8) | bytes[pos++]; |
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var offsets = []; |
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var end = pos; |
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var i, ii; |
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|
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if (count !== 0) { |
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var offsetSize = bytes[pos++]; |
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// add 1 for offset to determine size of last object |
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var startPos = pos + ((count + 1) * offsetSize) - 1; |
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|
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for (i = 0, ii = count + 1; i < ii; ++i) { |
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var offset = 0; |
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for (var j = 0; j < offsetSize; ++j) { |
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offset <<= 8; |
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offset += bytes[pos++]; |
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} |
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offsets.push(startPos + offset); |
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} |
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end = offsets[count]; |
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} |
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for (i = 0, ii = offsets.length - 1; i < ii; ++i) { |
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var offsetStart = offsets[i]; |
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var offsetEnd = offsets[i + 1]; |
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cffIndex.add(bytes.subarray(offsetStart, offsetEnd)); |
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} |
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return { obj: cffIndex, endPos: end, }; |
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}, |
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parseNameIndex: function CFFParser_parseNameIndex(index) { |
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var names = []; |
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for (var i = 0, ii = index.count; i < ii; ++i) { |
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var name = index.get(i); |
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// OTS doesn't allow names to be over 127 characters. |
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var length = Math.min(name.length, 127); |
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var data = []; |
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// OTS also only permits certain characters in the name. |
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for (var j = 0; j < length; ++j) { |
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var c = name[j]; |
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if (j === 0 && c === 0) { |
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data[j] = c; |
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continue; |
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} |
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if ((c < 33 || c > 126) || c === 91 /* [ */ || c === 93 /* ] */ || |
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c === 40 /* ( */ || c === 41 /* ) */ || c === 123 /* { */ || |
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c === 125 /* } */ || c === 60 /* < */ || c === 62 /* > */ || |
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c === 47 /* / */ || c === 37 /* % */ || c === 35 /* # */) { |
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data[j] = 95; |
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continue; |
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} |
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data[j] = c; |
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} |
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names.push(bytesToString(data)); |
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} |
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return names; |
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}, |
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parseStringIndex: function CFFParser_parseStringIndex(index) { |
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var strings = new CFFStrings(); |
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for (var i = 0, ii = index.count; i < ii; ++i) { |
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var data = index.get(i); |
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strings.add(bytesToString(data)); |
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} |
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return strings; |
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}, |
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createDict: function CFFParser_createDict(Type, dict, strings) { |
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var cffDict = new Type(strings); |
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for (var i = 0, ii = dict.length; i < ii; ++i) { |
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var pair = dict[i]; |
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var key = pair[0]; |
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var value = pair[1]; |
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cffDict.setByKey(key, value); |
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} |
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return cffDict; |
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}, |
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parseCharString: function CFFParser_parseCharString(state, data, |
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localSubrIndex, |
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globalSubrIndex) { |
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if (!data || state.callDepth > MAX_SUBR_NESTING) { |
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return false; |
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} |
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var stackSize = state.stackSize; |
|
var stack = state.stack; |
|
|
|
var length = data.length; |
|
|
|
for (var j = 0; j < length;) { |
|
var value = data[j++]; |
|
var validationCommand = null; |
|
if (value === 12) { |
|
var q = data[j++]; |
|
if (q === 0) { |
|
// The CFF specification state that the 'dotsection' command |
|
// (12, 0) is deprecated and treated as a no-op, but all Type2 |
|
// charstrings processors should support them. Unfortunately |
|
// the font sanitizer don't. As a workaround the sequence (12, 0) |
|
// is replaced by a useless (0, hmoveto). |
|
data[j - 2] = 139; |
|
data[j - 1] = 22; |
|
stackSize = 0; |
|
} else { |
|
validationCommand = CharstringValidationData12[q]; |
|
} |
|
} else if (value === 28) { // number (16 bit) |
|
stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16)) >> 16; |
|
j += 2; |
|
stackSize++; |
|
} else if (value === 14) { |
|
if (stackSize >= 4) { |
|
stackSize -= 4; |
|
if (this.seacAnalysisEnabled) { |
|
state.seac = stack.slice(stackSize, stackSize + 4); |
|
return false; |
|
} |
|
} |
|
validationCommand = CharstringValidationData[value]; |
|
} else if (value >= 32 && value <= 246) { // number |
|
stack[stackSize] = value - 139; |
|
stackSize++; |
|
} else if (value >= 247 && value <= 254) { // number (+1 bytes) |
|
stack[stackSize] = (value < 251 ? |
|
((value - 247) << 8) + data[j] + 108 : |
|
-((value - 251) << 8) - data[j] - 108); |
|
j++; |
|
stackSize++; |
|
} else if (value === 255) { // number (32 bit) |
|
stack[stackSize] = ((data[j] << 24) | (data[j + 1] << 16) | |
|
(data[j + 2] << 8) | data[j + 3]) / 65536; |
|
j += 4; |
|
stackSize++; |
|
} else if (value === 19 || value === 20) { |
|
state.hints += stackSize >> 1; |
|
// skipping right amount of hints flag data |
|
j += (state.hints + 7) >> 3; |
|
stackSize %= 2; |
|
validationCommand = CharstringValidationData[value]; |
|
} else if (value === 10 || value === 29) { |
|
var subrsIndex; |
|
if (value === 10) { |
|
subrsIndex = localSubrIndex; |
|
} else { |
|
subrsIndex = globalSubrIndex; |
|
} |
|
if (!subrsIndex) { |
|
validationCommand = CharstringValidationData[value]; |
|
warn('Missing subrsIndex for ' + validationCommand.id); |
|
return false; |
|
} |
|
var bias = 32768; |
|
if (subrsIndex.count < 1240) { |
|
bias = 107; |
|
} else if (subrsIndex.count < 33900) { |
|
bias = 1131; |
|
} |
|
var subrNumber = stack[--stackSize] + bias; |
|
if (subrNumber < 0 || subrNumber >= subrsIndex.count || |
|
isNaN(subrNumber)) { |
|
validationCommand = CharstringValidationData[value]; |
|
warn('Out of bounds subrIndex for ' + validationCommand.id); |
|
return false; |
|
} |
|
state.stackSize = stackSize; |
|
state.callDepth++; |
|
var valid = this.parseCharString(state, subrsIndex.get(subrNumber), |
|
localSubrIndex, globalSubrIndex); |
|
if (!valid) { |
|
return false; |
|
} |
|
state.callDepth--; |
|
stackSize = state.stackSize; |
|
continue; |
|
} else if (value === 11) { |
|
state.stackSize = stackSize; |
|
return true; |
|
} else { |
|
validationCommand = CharstringValidationData[value]; |
|
} |
|
if (validationCommand) { |
|
if (validationCommand.stem) { |
|
state.hints += stackSize >> 1; |
|
} |
|
if ('min' in validationCommand) { |
|
if (!state.undefStack && stackSize < validationCommand.min) { |
|
warn('Not enough parameters for ' + validationCommand.id + |
|
'; actual: ' + stackSize + |
|
', expected: ' + validationCommand.min); |
|
return false; |
|
} |
|
} |
|
if (state.firstStackClearing && validationCommand.stackClearing) { |
|
state.firstStackClearing = false; |
|
// the optional character width can be found before the first |
|
// stack-clearing command arguments |
|
stackSize -= validationCommand.min; |
|
if (stackSize >= 2 && validationCommand.stem) { |
|
// there are even amount of arguments for stem commands |
|
stackSize %= 2; |
|
} else if (stackSize > 1) { |
|
warn('Found too many parameters for stack-clearing command'); |
|
} |
|
if (stackSize > 0 && stack[stackSize - 1] >= 0) { |
|
state.width = stack[stackSize - 1]; |
|
} |
|
} |
|
if ('stackDelta' in validationCommand) { |
|
if ('stackFn' in validationCommand) { |
|
validationCommand.stackFn(stack, stackSize); |
|
} |
|
stackSize += validationCommand.stackDelta; |
|
} else if (validationCommand.stackClearing) { |
|
stackSize = 0; |
|
} else if (validationCommand.resetStack) { |
|
stackSize = 0; |
|
state.undefStack = false; |
|
} else if (validationCommand.undefStack) { |
|
stackSize = 0; |
|
state.undefStack = true; |
|
state.firstStackClearing = false; |
|
} |
|
} |
|
} |
|
state.stackSize = stackSize; |
|
return true; |
|
}, |
|
parseCharStrings: function CFFParser_parseCharStrings(charStrings, |
|
localSubrIndex, |
|
globalSubrIndex, |
|
fdSelect, |
|
fdArray) { |
|
var seacs = []; |
|
var widths = []; |
|
var count = charStrings.count; |
|
for (var i = 0; i < count; i++) { |
|
var charstring = charStrings.get(i); |
|
var state = { |
|
callDepth: 0, |
|
stackSize: 0, |
|
stack: [], |
|
undefStack: true, |
|
hints: 0, |
|
firstStackClearing: true, |
|
seac: null, |
|
width: null, |
|
}; |
|
var valid = true; |
|
var localSubrToUse = null; |
|
if (fdSelect && fdArray.length) { |
|
var fdIndex = fdSelect.getFDIndex(i); |
|
if (fdIndex === -1) { |
|
warn('Glyph index is not in fd select.'); |
|
valid = false; |
|
} |
|
if (fdIndex >= fdArray.length) { |
|
warn('Invalid fd index for glyph index.'); |
|
valid = false; |
|
} |
|
if (valid) { |
|
localSubrToUse = fdArray[fdIndex].privateDict.subrsIndex; |
|
} |
|
} else if (localSubrIndex) { |
|
localSubrToUse = localSubrIndex; |
|
} |
|
if (valid) { |
|
valid = this.parseCharString(state, charstring, localSubrToUse, |
|
globalSubrIndex); |
|
} |
|
if (state.width !== null) { |
|
widths[i] = state.width; |
|
} |
|
if (state.seac !== null) { |
|
seacs[i] = state.seac; |
|
} |
|
if (!valid) { |
|
// resetting invalid charstring to single 'endchar' |
|
charStrings.set(i, new Uint8Array([14])); |
|
} |
|
} |
|
return { charStrings, seacs, widths, }; |
|
}, |
|
emptyPrivateDictionary: |
|
function CFFParser_emptyPrivateDictionary(parentDict) { |
|
var privateDict = this.createDict(CFFPrivateDict, [], |
|
parentDict.strings); |
|
parentDict.setByKey(18, [0, 0]); |
|
parentDict.privateDict = privateDict; |
|
}, |
|
parsePrivateDict: function CFFParser_parsePrivateDict(parentDict) { |
|
// no private dict, do nothing |
|
if (!parentDict.hasName('Private')) { |
|
this.emptyPrivateDictionary(parentDict); |
|
return; |
|
} |
|
var privateOffset = parentDict.getByName('Private'); |
|
// make sure the params are formatted correctly |
|
if (!isArray(privateOffset) || privateOffset.length !== 2) { |
|
parentDict.removeByName('Private'); |
|
return; |
|
} |
|
var size = privateOffset[0]; |
|
var offset = privateOffset[1]; |
|
// remove empty dicts or ones that refer to invalid location |
|
if (size === 0 || offset >= this.bytes.length) { |
|
this.emptyPrivateDictionary(parentDict); |
|
return; |
|
} |
|
|
|
var privateDictEnd = offset + size; |
|
var dictData = this.bytes.subarray(offset, privateDictEnd); |
|
var dict = this.parseDict(dictData); |
|
var privateDict = this.createDict(CFFPrivateDict, dict, |
|
parentDict.strings); |
|
parentDict.privateDict = privateDict; |
|
|
|
// Parse the Subrs index also since it's relative to the private dict. |
|
if (!privateDict.getByName('Subrs')) { |
|
return; |
|
} |
|
var subrsOffset = privateDict.getByName('Subrs'); |
|
var relativeOffset = offset + subrsOffset; |
|
// Validate the offset. |
|
if (subrsOffset === 0 || relativeOffset >= this.bytes.length) { |
|
this.emptyPrivateDictionary(parentDict); |
|
return; |
|
} |
|
var subrsIndex = this.parseIndex(relativeOffset); |
|
privateDict.subrsIndex = subrsIndex.obj; |
|
}, |
|
parseCharsets: function CFFParser_parseCharsets(pos, length, strings, cid) { |
|
if (pos === 0) { |
|
return new CFFCharset(true, CFFCharsetPredefinedTypes.ISO_ADOBE, |
|
ISOAdobeCharset); |
|
} else if (pos === 1) { |
|
return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT, |
|
ExpertCharset); |
|
} else if (pos === 2) { |
|
return new CFFCharset(true, CFFCharsetPredefinedTypes.EXPERT_SUBSET, |
|
ExpertSubsetCharset); |
|
} |
|
|
|
var bytes = this.bytes; |
|
var start = pos; |
|
var format = bytes[pos++]; |
|
var charset = ['.notdef']; |
|
var id, count, i; |
|
|
|
// subtract 1 for the .notdef glyph |
|
length -= 1; |
|
|
|
switch (format) { |
|
case 0: |
|
for (i = 0; i < length; i++) { |
|
id = (bytes[pos++] << 8) | bytes[pos++]; |
|
charset.push(cid ? id : strings.get(id)); |
|
} |
|
break; |
|
case 1: |
|
while (charset.length <= length) { |
|
id = (bytes[pos++] << 8) | bytes[pos++]; |
|
count = bytes[pos++]; |
|
for (i = 0; i <= count; i++) { |
|
charset.push(cid ? id++ : strings.get(id++)); |
|
} |
|
} |
|
break; |
|
case 2: |
|
while (charset.length <= length) { |
|
id = (bytes[pos++] << 8) | bytes[pos++]; |
|
count = (bytes[pos++] << 8) | bytes[pos++]; |
|
for (i = 0; i <= count; i++) { |
|
charset.push(cid ? id++ : strings.get(id++)); |
|
} |
|
} |
|
break; |
|
default: |
|
error('Unknown charset format'); |
|
} |
|
// Raw won't be needed if we actually compile the charset. |
|
var end = pos; |
|
var raw = bytes.subarray(start, end); |
|
|
|
return new CFFCharset(false, format, charset, raw); |
|
}, |
|
parseEncoding: function CFFParser_parseEncoding(pos, |
|
properties, |
|
strings, |
|
charset) { |
|
var encoding = Object.create(null); |
|
var bytes = this.bytes; |
|
var predefined = false; |
|
var format, i, ii; |
|
var raw = null; |
|
|
|
function readSupplement() { |
|
var supplementsCount = bytes[pos++]; |
|
for (i = 0; i < supplementsCount; i++) { |
|
var code = bytes[pos++]; |
|
var sid = (bytes[pos++] << 8) + (bytes[pos++] & 0xff); |
|
encoding[code] = charset.indexOf(strings.get(sid)); |
|
} |
|
} |
|
|
|
if (pos === 0 || pos === 1) { |
|
predefined = true; |
|
format = pos; |
|
var baseEncoding = pos ? ExpertEncoding : StandardEncoding; |
|
for (i = 0, ii = charset.length; i < ii; i++) { |
|
var index = baseEncoding.indexOf(charset[i]); |
|
if (index !== -1) { |
|
encoding[index] = i; |
|
} |
|
} |
|
} else { |
|
var dataStart = pos; |
|
format = bytes[pos++]; |
|
switch (format & 0x7f) { |
|
case 0: |
|
var glyphsCount = bytes[pos++]; |
|
for (i = 1; i <= glyphsCount; i++) { |
|
encoding[bytes[pos++]] = i; |
|
} |
|
break; |
|
|
|
case 1: |
|
var rangesCount = bytes[pos++]; |
|
var gid = 1; |
|
for (i = 0; i < rangesCount; i++) { |
|
var start = bytes[pos++]; |
|
var left = bytes[pos++]; |
|
for (var j = start; j <= start + left; j++) { |
|
encoding[j] = gid++; |
|
} |
|
} |
|
break; |
|
|
|
default: |
|
error('Unknown encoding format: ' + format + ' in CFF'); |
|
break; |
|
} |
|
var dataEnd = pos; |
|
if (format & 0x80) { // hasSupplement |
|
// The font sanitizer does not support CFF encoding with a |
|
// supplement, since the encoding is not really used to map |
|
// between gid to glyph, let's overwrite what is declared in |
|
// the top dictionary to let the sanitizer think the font use |
|
// StandardEncoding, that's a lie but that's ok. |
|
bytes[dataStart] &= 0x7f; |
|
readSupplement(); |
|
} |
|
raw = bytes.subarray(dataStart, dataEnd); |
|
} |
|
format = format & 0x7f; |
|
return new CFFEncoding(predefined, format, encoding, raw); |
|
}, |
|
parseFDSelect: function CFFParser_parseFDSelect(pos, length) { |
|
var start = pos; |
|
var bytes = this.bytes; |
|
var format = bytes[pos++]; |
|
var fdSelect = [], rawBytes; |
|
var i, invalidFirstGID = false; |
|
|
|
switch (format) { |
|
case 0: |
|
for (i = 0; i < length; ++i) { |
|
var id = bytes[pos++]; |
|
fdSelect.push(id); |
|
} |
|
rawBytes = bytes.subarray(start, pos); |
|
break; |
|
case 3: |
|
var rangesCount = (bytes[pos++] << 8) | bytes[pos++]; |
|
for (i = 0; i < rangesCount; ++i) { |
|
var first = (bytes[pos++] << 8) | bytes[pos++]; |
|
if (i === 0 && first !== 0) { |
|
warn('parseFDSelect: The first range must have a first GID of 0' + |
|
' -- trying to recover.'); |
|
invalidFirstGID = true; |
|
first = 0; |
|
} |
|
var fdIndex = bytes[pos++]; |
|
var next = (bytes[pos] << 8) | bytes[pos + 1]; |
|
for (var j = first; j < next; ++j) { |
|
fdSelect.push(fdIndex); |
|
} |
|
} |
|
// Advance past the sentinel(next). |
|
pos += 2; |
|
rawBytes = bytes.subarray(start, pos); |
|
|
|
if (invalidFirstGID) { |
|
rawBytes[3] = rawBytes[4] = 0; // Adjust the first range, first GID. |
|
} |
|
break; |
|
default: |
|
error('parseFDSelect: Unknown format "' + format + '".'); |
|
break; |
|
} |
|
assert(fdSelect.length === length, 'parseFDSelect: Invalid font data.'); |
|
|
|
return new CFFFDSelect(fdSelect, rawBytes); |
|
}, |
|
}; |
|
return CFFParser; |
|
})(); |
|
|
|
// Compact Font Format |
|
var CFF = (function CFFClosure() { |
|
function CFF() { |
|
this.header = null; |
|
this.names = []; |
|
this.topDict = null; |
|
this.strings = new CFFStrings(); |
|
this.globalSubrIndex = null; |
|
|
|
// The following could really be per font, but since we only have one font |
|
// store them here. |
|
this.encoding = null; |
|
this.charset = null; |
|
this.charStrings = null; |
|
this.fdArray = []; |
|
this.fdSelect = null; |
|
|
|
this.isCIDFont = false; |
|
} |
|
return CFF; |
|
})(); |
|
|
|
var CFFHeader = (function CFFHeaderClosure() { |
|
function CFFHeader(major, minor, hdrSize, offSize) { |
|
this.major = major; |
|
this.minor = minor; |
|
this.hdrSize = hdrSize; |
|
this.offSize = offSize; |
|
} |
|
return CFFHeader; |
|
})(); |
|
|
|
var CFFStrings = (function CFFStringsClosure() { |
|
function CFFStrings() { |
|
this.strings = []; |
|
} |
|
CFFStrings.prototype = { |
|
get: function CFFStrings_get(index) { |
|
if (index >= 0 && index <= 390) { |
|
return CFFStandardStrings[index]; |
|
} |
|
if (index - 391 <= this.strings.length) { |
|
return this.strings[index - 391]; |
|
} |
|
return CFFStandardStrings[0]; |
|
}, |
|
add: function CFFStrings_add(value) { |
|
this.strings.push(value); |
|
}, |
|
get count() { |
|
return this.strings.length; |
|
}, |
|
}; |
|
return CFFStrings; |
|
})(); |
|
|
|
var CFFIndex = (function CFFIndexClosure() { |
|
function CFFIndex() { |
|
this.objects = []; |
|
this.length = 0; |
|
} |
|
CFFIndex.prototype = { |
|
add: function CFFIndex_add(data) { |
|
this.length += data.length; |
|
this.objects.push(data); |
|
}, |
|
set: function CFFIndex_set(index, data) { |
|
this.length += data.length - this.objects[index].length; |
|
this.objects[index] = data; |
|
}, |
|
get: function CFFIndex_get(index) { |
|
return this.objects[index]; |
|
}, |
|
get count() { |
|
return this.objects.length; |
|
}, |
|
}; |
|
return CFFIndex; |
|
})(); |
|
|
|
var CFFDict = (function CFFDictClosure() { |
|
function CFFDict(tables, strings) { |
|
this.keyToNameMap = tables.keyToNameMap; |
|
this.nameToKeyMap = tables.nameToKeyMap; |
|
this.defaults = tables.defaults; |
|
this.types = tables.types; |
|
this.opcodes = tables.opcodes; |
|
this.order = tables.order; |
|
this.strings = strings; |
|
this.values = Object.create(null); |
|
} |
|
CFFDict.prototype = { |
|
// value should always be an array |
|
setByKey: function CFFDict_setByKey(key, value) { |
|
if (!(key in this.keyToNameMap)) { |
|
return false; |
|
} |
|
var valueLength = value.length; |
|
// ignore empty values |
|
if (valueLength === 0) { |
|
return true; |
|
} |
|
// Ignore invalid values (fixes bug1068432.pdf and bug1308536.pdf). |
|
for (var i = 0; i < valueLength; i++) { |
|
if (isNaN(value[i])) { |
|
warn('Invalid CFFDict value: "' + value + '" for key "' + key + '".'); |
|
return true; |
|
} |
|
} |
|
var type = this.types[key]; |
|
// remove the array wrapping these types of values |
|
if (type === 'num' || type === 'sid' || type === 'offset') { |
|
value = value[0]; |
|
} |
|
this.values[key] = value; |
|
return true; |
|
}, |
|
setByName: function CFFDict_setByName(name, value) { |
|
if (!(name in this.nameToKeyMap)) { |
|
error('Invalid dictionary name "' + name + '"'); |
|
} |
|
this.values[this.nameToKeyMap[name]] = value; |
|
}, |
|
hasName: function CFFDict_hasName(name) { |
|
return this.nameToKeyMap[name] in this.values; |
|
}, |
|
getByName: function CFFDict_getByName(name) { |
|
if (!(name in this.nameToKeyMap)) { |
|
error('Invalid dictionary name "' + name + '"'); |
|
} |
|
var key = this.nameToKeyMap[name]; |
|
if (!(key in this.values)) { |
|
return this.defaults[key]; |
|
} |
|
return this.values[key]; |
|
}, |
|
removeByName: function CFFDict_removeByName(name) { |
|
delete this.values[this.nameToKeyMap[name]]; |
|
}, |
|
}; |
|
CFFDict.createTables = function CFFDict_createTables(layout) { |
|
var tables = { |
|
keyToNameMap: {}, |
|
nameToKeyMap: {}, |
|
defaults: {}, |
|
types: {}, |
|
opcodes: {}, |
|
order: [], |
|
}; |
|
for (var i = 0, ii = layout.length; i < ii; ++i) { |
|
var entry = layout[i]; |
|
var key = isArray(entry[0]) ? (entry[0][0] << 8) + entry[0][1] : entry[0]; |
|
tables.keyToNameMap[key] = entry[1]; |
|
tables.nameToKeyMap[entry[1]] = key; |
|
tables.types[key] = entry[2]; |
|
tables.defaults[key] = entry[3]; |
|
tables.opcodes[key] = isArray(entry[0]) ? entry[0] : [entry[0]]; |
|
tables.order.push(key); |
|
} |
|
return tables; |
|
}; |
|
return CFFDict; |
|
})(); |
|
|
|
var CFFTopDict = (function CFFTopDictClosure() { |
|
var layout = [ |
|
[[12, 30], 'ROS', ['sid', 'sid', 'num'], null], |
|
[[12, 20], 'SyntheticBase', 'num', null], |
|
[0, 'version', 'sid', null], |
|
[1, 'Notice', 'sid', null], |
|
[[12, 0], 'Copyright', 'sid', null], |
|
[2, 'FullName', 'sid', null], |
|
[3, 'FamilyName', 'sid', null], |
|
[4, 'Weight', 'sid', null], |
|
[[12, 1], 'isFixedPitch', 'num', 0], |
|
[[12, 2], 'ItalicAngle', 'num', 0], |
|
[[12, 3], 'UnderlinePosition', 'num', -100], |
|
[[12, 4], 'UnderlineThickness', 'num', 50], |
|
[[12, 5], 'PaintType', 'num', 0], |
|
[[12, 6], 'CharstringType', 'num', 2], |
|
[[12, 7], 'FontMatrix', ['num', 'num', 'num', 'num', 'num', 'num'], |
|
[0.001, 0, 0, 0.001, 0, 0]], |
|
[13, 'UniqueID', 'num', null], |
|
[5, 'FontBBox', ['num', 'num', 'num', 'num'], [0, 0, 0, 0]], |
|
[[12, 8], 'StrokeWidth', 'num', 0], |
|
[14, 'XUID', 'array', null], |
|
[15, 'charset', 'offset', 0], |
|
[16, 'Encoding', 'offset', 0], |
|
[17, 'CharStrings', 'offset', 0], |
|
[18, 'Private', ['offset', 'offset'], null], |
|
[[12, 21], 'PostScript', 'sid', null], |
|
[[12, 22], 'BaseFontName', 'sid', null], |
|
[[12, 23], 'BaseFontBlend', 'delta', null], |
|
[[12, 31], 'CIDFontVersion', 'num', 0], |
|
[[12, 32], 'CIDFontRevision', 'num', 0], |
|
[[12, 33], 'CIDFontType', 'num', 0], |
|
[[12, 34], 'CIDCount', 'num', 8720], |
|
[[12, 35], 'UIDBase', 'num', null], |
|
// XXX: CID Fonts on DirectWrite 6.1 only seem to work if FDSelect comes |
|
// before FDArray. |
|
[[12, 37], 'FDSelect', 'offset', null], |
|
[[12, 36], 'FDArray', 'offset', null], |
|
[[12, 38], 'FontName', 'sid', null] |
|
]; |
|
var tables = null; |
|
function CFFTopDict(strings) { |
|
if (tables === null) { |
|
tables = CFFDict.createTables(layout); |
|
} |
|
CFFDict.call(this, tables, strings); |
|
this.privateDict = null; |
|
} |
|
CFFTopDict.prototype = Object.create(CFFDict.prototype); |
|
return CFFTopDict; |
|
})(); |
|
|
|
var CFFPrivateDict = (function CFFPrivateDictClosure() { |
|
var layout = [ |
|
[6, 'BlueValues', 'delta', null], |
|
[7, 'OtherBlues', 'delta', null], |
|
[8, 'FamilyBlues', 'delta', null], |
|
[9, 'FamilyOtherBlues', 'delta', null], |
|
[[12, 9], 'BlueScale', 'num', 0.039625], |
|
[[12, 10], 'BlueShift', 'num', 7], |
|
[[12, 11], 'BlueFuzz', 'num', 1], |
|
[10, 'StdHW', 'num', null], |
|
[11, 'StdVW', 'num', null], |
|
[[12, 12], 'StemSnapH', 'delta', null], |
|
[[12, 13], 'StemSnapV', 'delta', null], |
|
[[12, 14], 'ForceBold', 'num', 0], |
|
[[12, 17], 'LanguageGroup', 'num', 0], |
|
[[12, 18], 'ExpansionFactor', 'num', 0.06], |
|
[[12, 19], 'initialRandomSeed', 'num', 0], |
|
[20, 'defaultWidthX', 'num', 0], |
|
[21, 'nominalWidthX', 'num', 0], |
|
[19, 'Subrs', 'offset', null] |
|
]; |
|
var tables = null; |
|
function CFFPrivateDict(strings) { |
|
if (tables === null) { |
|
tables = CFFDict.createTables(layout); |
|
} |
|
CFFDict.call(this, tables, strings); |
|
this.subrsIndex = null; |
|
} |
|
CFFPrivateDict.prototype = Object.create(CFFDict.prototype); |
|
return CFFPrivateDict; |
|
})(); |
|
|
|
var CFFCharsetPredefinedTypes = { |
|
ISO_ADOBE: 0, |
|
EXPERT: 1, |
|
EXPERT_SUBSET: 2, |
|
}; |
|
var CFFCharset = (function CFFCharsetClosure() { |
|
function CFFCharset(predefined, format, charset, raw) { |
|
this.predefined = predefined; |
|
this.format = format; |
|
this.charset = charset; |
|
this.raw = raw; |
|
} |
|
return CFFCharset; |
|
})(); |
|
|
|
var CFFEncoding = (function CFFEncodingClosure() { |
|
function CFFEncoding(predefined, format, encoding, raw) { |
|
this.predefined = predefined; |
|
this.format = format; |
|
this.encoding = encoding; |
|
this.raw = raw; |
|
} |
|
return CFFEncoding; |
|
})(); |
|
|
|
var CFFFDSelect = (function CFFFDSelectClosure() { |
|
function CFFFDSelect(fdSelect, raw) { |
|
this.fdSelect = fdSelect; |
|
this.raw = raw; |
|
} |
|
CFFFDSelect.prototype = { |
|
getFDIndex: function CFFFDSelect_get(glyphIndex) { |
|
if (glyphIndex < 0 || glyphIndex >= this.fdSelect.length) { |
|
return -1; |
|
} |
|
return this.fdSelect[glyphIndex]; |
|
}, |
|
}; |
|
return CFFFDSelect; |
|
})(); |
|
|
|
// Helper class to keep track of where an offset is within the data and helps |
|
// filling in that offset once it's known. |
|
var CFFOffsetTracker = (function CFFOffsetTrackerClosure() { |
|
function CFFOffsetTracker() { |
|
this.offsets = Object.create(null); |
|
} |
|
CFFOffsetTracker.prototype = { |
|
isTracking: function CFFOffsetTracker_isTracking(key) { |
|
return key in this.offsets; |
|
}, |
|
track: function CFFOffsetTracker_track(key, location) { |
|
if (key in this.offsets) { |
|
error('Already tracking location of ' + key); |
|
} |
|
this.offsets[key] = location; |
|
}, |
|
offset: function CFFOffsetTracker_offset(value) { |
|
for (var key in this.offsets) { |
|
this.offsets[key] += value; |
|
} |
|
}, |
|
setEntryLocation: function CFFOffsetTracker_setEntryLocation(key, |
|
values, |
|
output) { |
|
if (!(key in this.offsets)) { |
|
error('Not tracking location of ' + key); |
|
} |
|
var data = output.data; |
|
var dataOffset = this.offsets[key]; |
|
var size = 5; |
|
for (var i = 0, ii = values.length; i < ii; ++i) { |
|
var offset0 = i * size + dataOffset; |
|
var offset1 = offset0 + 1; |
|
var offset2 = offset0 + 2; |
|
var offset3 = offset0 + 3; |
|
var offset4 = offset0 + 4; |
|
// It's easy to screw up offsets so perform this sanity check. |
|
if (data[offset0] !== 0x1d || data[offset1] !== 0 || |
|
data[offset2] !== 0 || data[offset3] !== 0 || data[offset4] !== 0) { |
|
error('writing to an offset that is not empty'); |
|
} |
|
var value = values[i]; |
|
data[offset0] = 0x1d; |
|
data[offset1] = (value >> 24) & 0xFF; |
|
data[offset2] = (value >> 16) & 0xFF; |
|
data[offset3] = (value >> 8) & 0xFF; |
|
data[offset4] = value & 0xFF; |
|
} |
|
}, |
|
}; |
|
return CFFOffsetTracker; |
|
})(); |
|
|
|
// Takes a CFF and converts it to the binary representation. |
|
var CFFCompiler = (function CFFCompilerClosure() { |
|
function CFFCompiler(cff) { |
|
this.cff = cff; |
|
} |
|
CFFCompiler.prototype = { |
|
compile: function CFFCompiler_compile() { |
|
var cff = this.cff; |
|
var output = { |
|
data: [], |
|
length: 0, |
|
add: function CFFCompiler_add(data) { |
|
this.data = this.data.concat(data); |
|
this.length = this.data.length; |
|
}, |
|
}; |
|
|
|
// Compile the five entries that must be in order. |
|
var header = this.compileHeader(cff.header); |
|
output.add(header); |
|
|
|
var nameIndex = this.compileNameIndex(cff.names); |
|
output.add(nameIndex); |
|
|
|
if (cff.isCIDFont) { |
|
// The spec is unclear on how font matrices should relate to each other |
|
// when there is one in the main top dict and the sub top dicts. |
|
// Windows handles this differently than linux and osx so we have to |
|
// normalize to work on all. |
|
// Rules based off of some mailing list discussions: |
|
// - If main font has a matrix and subfont doesn't, use the main matrix. |
|
// - If no main font matrix and there is a subfont matrix, use the |
|
// subfont matrix. |
|
// - If both have matrices, concat together. |
|
// - If neither have matrices, use default. |
|
// To make this work on all platforms we move the top matrix into each |
|
// sub top dict and concat if necessary. |
|
if (cff.topDict.hasName('FontMatrix')) { |
|
var base = cff.topDict.getByName('FontMatrix'); |
|
cff.topDict.removeByName('FontMatrix'); |
|
for (var i = 0, ii = cff.fdArray.length; i < ii; i++) { |
|
var subDict = cff.fdArray[i]; |
|
var matrix = base.slice(0); |
|
if (subDict.hasName('FontMatrix')) { |
|
matrix = Util.transform(matrix, subDict.getByName('FontMatrix')); |
|
} |
|
subDict.setByName('FontMatrix', matrix); |
|
} |
|
} |
|
} |
|
|
|
var compiled = this.compileTopDicts([cff.topDict], |
|
output.length, |
|
cff.isCIDFont); |
|
output.add(compiled.output); |
|
var topDictTracker = compiled.trackers[0]; |
|
|
|
var stringIndex = this.compileStringIndex(cff.strings.strings); |
|
output.add(stringIndex); |
|
|
|
var globalSubrIndex = this.compileIndex(cff.globalSubrIndex); |
|
output.add(globalSubrIndex); |
|
|
|
// Now start on the other entries that have no specific order. |
|
if (cff.encoding && cff.topDict.hasName('Encoding')) { |
|
if (cff.encoding.predefined) { |
|
topDictTracker.setEntryLocation('Encoding', [cff.encoding.format], |
|
output); |
|
} else { |
|
var encoding = this.compileEncoding(cff.encoding); |
|
topDictTracker.setEntryLocation('Encoding', [output.length], output); |
|
output.add(encoding); |
|
} |
|
} |
|
|
|
if (cff.charset && cff.topDict.hasName('charset')) { |
|
if (cff.charset.predefined) { |
|
topDictTracker.setEntryLocation('charset', [cff.charset.format], |
|
output); |
|
} else { |
|
var charset = this.compileCharset(cff.charset); |
|
topDictTracker.setEntryLocation('charset', [output.length], output); |
|
output.add(charset); |
|
} |
|
} |
|
|
|
var charStrings = this.compileCharStrings(cff.charStrings); |
|
topDictTracker.setEntryLocation('CharStrings', [output.length], output); |
|
output.add(charStrings); |
|
|
|
if (cff.isCIDFont) { |
|
// For some reason FDSelect must be in front of FDArray on windows. OSX |
|
// and linux don't seem to care. |
|
topDictTracker.setEntryLocation('FDSelect', [output.length], output); |
|
var fdSelect = this.compileFDSelect(cff.fdSelect.raw); |
|
output.add(fdSelect); |
|
// It is unclear if the sub font dictionary can have CID related |
|
// dictionary keys, but the sanitizer doesn't like them so remove them. |
|
compiled = this.compileTopDicts(cff.fdArray, output.length, true); |
|
topDictTracker.setEntryLocation('FDArray', [output.length], output); |
|
output.add(compiled.output); |
|
var fontDictTrackers = compiled.trackers; |
|
|
|
this.compilePrivateDicts(cff.fdArray, fontDictTrackers, output); |
|
} |
|
|
|
this.compilePrivateDicts([cff.topDict], [topDictTracker], output); |
|
|
|
// If the font data ends with INDEX whose object data is zero-length, |
|
// the sanitizer will bail out. Add a dummy byte to avoid that. |
|
output.add([0]); |
|
|
|
return output.data; |
|
}, |
|
encodeNumber: function CFFCompiler_encodeNumber(value) { |
|
if (parseFloat(value) === parseInt(value, 10) && !isNaN(value)) { // isInt |
|
return this.encodeInteger(value); |
|
} |
|
return this.encodeFloat(value); |
|
}, |
|
encodeFloat: function CFFCompiler_encodeFloat(num) { |
|
var value = num.toString(); |
|
|
|
// rounding inaccurate doubles |
|
var m = /\.(\d*?)(?:9{5,20}|0{5,20})\d{0,2}(?:e(.+)|$)/.exec(value); |
|
if (m) { |
|
var epsilon = parseFloat('1e' + ((m[2] ? +m[2] : 0) + m[1].length)); |
|
value = (Math.round(num * epsilon) / epsilon).toString(); |
|
} |
|
|
|
var nibbles = ''; |
|
var i, ii; |
|
for (i = 0, ii = value.length; i < ii; ++i) { |
|
var a = value[i]; |
|
if (a === 'e') { |
|
nibbles += value[++i] === '-' ? 'c' : 'b'; |
|
} else if (a === '.') { |
|
nibbles += 'a'; |
|
} else if (a === '-') { |
|
nibbles += 'e'; |
|
} else { |
|
nibbles += a; |
|
} |
|
} |
|
nibbles += (nibbles.length & 1) ? 'f' : 'ff'; |
|
var out = [30]; |
|
for (i = 0, ii = nibbles.length; i < ii; i += 2) { |
|
out.push(parseInt(nibbles.substr(i, 2), 16)); |
|
} |
|
return out; |
|
}, |
|
encodeInteger: function CFFCompiler_encodeInteger(value) { |
|
var code; |
|
if (value >= -107 && value <= 107) { |
|
code = [value + 139]; |
|
} else if (value >= 108 && value <= 1131) { |
|
value = value - 108; |
|
code = [(value >> 8) + 247, value & 0xFF]; |
|
} else if (value >= -1131 && value <= -108) { |
|
value = -value - 108; |
|
code = [(value >> 8) + 251, value & 0xFF]; |
|
} else if (value >= -32768 && value <= 32767) { |
|
code = [0x1c, (value >> 8) & 0xFF, value & 0xFF]; |
|
} else { |
|
code = [0x1d, |
|
(value >> 24) & 0xFF, |
|
(value >> 16) & 0xFF, |
|
(value >> 8) & 0xFF, |
|
value & 0xFF]; |
|
} |
|
return code; |
|
}, |
|
compileHeader: function CFFCompiler_compileHeader(header) { |
|
return [ |
|
header.major, |
|
header.minor, |
|
header.hdrSize, |
|
header.offSize |
|
]; |
|
}, |
|
compileNameIndex: function CFFCompiler_compileNameIndex(names) { |
|
var nameIndex = new CFFIndex(); |
|
for (var i = 0, ii = names.length; i < ii; ++i) { |
|
nameIndex.add(stringToBytes(names[i])); |
|
} |
|
return this.compileIndex(nameIndex); |
|
}, |
|
compileTopDicts: function CFFCompiler_compileTopDicts(dicts, |
|
length, |
|
removeCidKeys) { |
|
var fontDictTrackers = []; |
|
var fdArrayIndex = new CFFIndex(); |
|
for (var i = 0, ii = dicts.length; i < ii; ++i) { |
|
var fontDict = dicts[i]; |
|
if (removeCidKeys) { |
|
fontDict.removeByName('CIDFontVersion'); |
|
fontDict.removeByName('CIDFontRevision'); |
|
fontDict.removeByName('CIDFontType'); |
|
fontDict.removeByName('CIDCount'); |
|
fontDict.removeByName('UIDBase'); |
|
} |
|
var fontDictTracker = new CFFOffsetTracker(); |
|
var fontDictData = this.compileDict(fontDict, fontDictTracker); |
|
fontDictTrackers.push(fontDictTracker); |
|
fdArrayIndex.add(fontDictData); |
|
fontDictTracker.offset(length); |
|
} |
|
fdArrayIndex = this.compileIndex(fdArrayIndex, fontDictTrackers); |
|
return { |
|
trackers: fontDictTrackers, |
|
output: fdArrayIndex, |
|
}; |
|
}, |
|
compilePrivateDicts: function CFFCompiler_compilePrivateDicts(dicts, |
|
trackers, |
|
output) { |
|
for (var i = 0, ii = dicts.length; i < ii; ++i) { |
|
var fontDict = dicts[i]; |
|
assert(fontDict.privateDict && fontDict.hasName('Private'), |
|
'There must be an private dictionary.'); |
|
var privateDict = fontDict.privateDict; |
|
var privateDictTracker = new CFFOffsetTracker(); |
|
var privateDictData = this.compileDict(privateDict, privateDictTracker); |
|
|
|
var outputLength = output.length; |
|
privateDictTracker.offset(outputLength); |
|
if (!privateDictData.length) { |
|
// The private dictionary was empty, set the output length to zero to |
|
// ensure the offset length isn't out of bounds in the eyes of the |
|
// sanitizer. |
|
outputLength = 0; |
|
} |
|
|
|
trackers[i].setEntryLocation('Private', |
|
[privateDictData.length, outputLength], |
|
output); |
|
output.add(privateDictData); |
|
|
|
if (privateDict.subrsIndex && privateDict.hasName('Subrs')) { |
|
var subrs = this.compileIndex(privateDict.subrsIndex); |
|
privateDictTracker.setEntryLocation('Subrs', [privateDictData.length], |
|
output); |
|
output.add(subrs); |
|
} |
|
} |
|
}, |
|
compileDict: function CFFCompiler_compileDict(dict, offsetTracker) { |
|
var out = []; |
|
// The dictionary keys must be in a certain order. |
|
var order = dict.order; |
|
for (var i = 0; i < order.length; ++i) { |
|
var key = order[i]; |
|
if (!(key in dict.values)) { |
|
continue; |
|
} |
|
var values = dict.values[key]; |
|
var types = dict.types[key]; |
|
if (!isArray(types)) { |
|
types = [types]; |
|
} |
|
if (!isArray(values)) { |
|
values = [values]; |
|
} |
|
|
|
// Remove any empty dict values. |
|
if (values.length === 0) { |
|
continue; |
|
} |
|
|
|
for (var j = 0, jj = types.length; j < jj; ++j) { |
|
var type = types[j]; |
|
var value = values[j]; |
|
switch (type) { |
|
case 'num': |
|
case 'sid': |
|
out = out.concat(this.encodeNumber(value)); |
|
break; |
|
case 'offset': |
|
// For offsets we just insert a 32bit integer so we don't have to |
|
// deal with figuring out the length of the offset when it gets |
|
// replaced later on by the compiler. |
|
var name = dict.keyToNameMap[key]; |
|
// Some offsets have the offset and the length, so just record the |
|
// position of the first one. |
|
if (!offsetTracker.isTracking(name)) { |
|
offsetTracker.track(name, out.length); |
|
} |
|
out = out.concat([0x1d, 0, 0, 0, 0]); |
|
break; |
|
case 'array': |
|
case 'delta': |
|
out = out.concat(this.encodeNumber(value)); |
|
for (var k = 1, kk = values.length; k < kk; ++k) { |
|
out = out.concat(this.encodeNumber(values[k])); |
|
} |
|
break; |
|
default: |
|
error('Unknown data type of ' + type); |
|
break; |
|
} |
|
} |
|
out = out.concat(dict.opcodes[key]); |
|
} |
|
return out; |
|
}, |
|
compileStringIndex: function CFFCompiler_compileStringIndex(strings) { |
|
var stringIndex = new CFFIndex(); |
|
for (var i = 0, ii = strings.length; i < ii; ++i) { |
|
stringIndex.add(stringToBytes(strings[i])); |
|
} |
|
return this.compileIndex(stringIndex); |
|
}, |
|
compileGlobalSubrIndex: function CFFCompiler_compileGlobalSubrIndex() { |
|
var globalSubrIndex = this.cff.globalSubrIndex; |
|
this.out.writeByteArray(this.compileIndex(globalSubrIndex)); |
|
}, |
|
compileCharStrings: function CFFCompiler_compileCharStrings(charStrings) { |
|
return this.compileIndex(charStrings); |
|
}, |
|
compileCharset: function CFFCompiler_compileCharset(charset) { |
|
return this.compileTypedArray(charset.raw); |
|
}, |
|
compileEncoding: function CFFCompiler_compileEncoding(encoding) { |
|
return this.compileTypedArray(encoding.raw); |
|
}, |
|
compileFDSelect: function CFFCompiler_compileFDSelect(fdSelect) { |
|
return this.compileTypedArray(fdSelect); |
|
}, |
|
compileTypedArray: function CFFCompiler_compileTypedArray(data) { |
|
var out = []; |
|
for (var i = 0, ii = data.length; i < ii; ++i) { |
|
out[i] = data[i]; |
|
} |
|
return out; |
|
}, |
|
compileIndex: function CFFCompiler_compileIndex(index, trackers) { |
|
trackers = trackers || []; |
|
var objects = index.objects; |
|
// First 2 bytes contains the number of objects contained into this index |
|
var count = objects.length; |
|
|
|
// If there is no object, just create an index. This technically |
|
// should just be [0, 0] but OTS has an issue with that. |
|
if (count === 0) { |
|
return [0, 0, 0]; |
|
} |
|
|
|
var data = [(count >> 8) & 0xFF, count & 0xff]; |
|
|
|
var lastOffset = 1, i; |
|
for (i = 0; i < count; ++i) { |
|
lastOffset += objects[i].length; |
|
} |
|
|
|
var offsetSize; |
|
if (lastOffset < 0x100) { |
|
offsetSize = 1; |
|
} else if (lastOffset < 0x10000) { |
|
offsetSize = 2; |
|
} else if (lastOffset < 0x1000000) { |
|
offsetSize = 3; |
|
} else { |
|
offsetSize = 4; |
|
} |
|
|
|
// Next byte contains the offset size use to reference object in the file |
|
data.push(offsetSize); |
|
|
|
// Add another offset after this one because we need a new offset |
|
var relativeOffset = 1; |
|
for (i = 0; i < count + 1; i++) { |
|
if (offsetSize === 1) { |
|
data.push(relativeOffset & 0xFF); |
|
} else if (offsetSize === 2) { |
|
data.push((relativeOffset >> 8) & 0xFF, |
|
relativeOffset & 0xFF); |
|
} else if (offsetSize === 3) { |
|
data.push((relativeOffset >> 16) & 0xFF, |
|
(relativeOffset >> 8) & 0xFF, |
|
relativeOffset & 0xFF); |
|
} else { |
|
data.push((relativeOffset >>> 24) & 0xFF, |
|
(relativeOffset >> 16) & 0xFF, |
|
(relativeOffset >> 8) & 0xFF, |
|
relativeOffset & 0xFF); |
|
} |
|
|
|
if (objects[i]) { |
|
relativeOffset += objects[i].length; |
|
} |
|
} |
|
|
|
for (i = 0; i < count; i++) { |
|
// Notify the tracker where the object will be offset in the data. |
|
if (trackers[i]) { |
|
trackers[i].offset(data.length); |
|
} |
|
for (var j = 0, jj = objects[i].length; j < jj; j++) { |
|
data.push(objects[i][j]); |
|
} |
|
} |
|
return data; |
|
}, |
|
}; |
|
return CFFCompiler; |
|
})(); |
|
|
|
export { |
|
CFFStandardStrings, |
|
CFFParser, |
|
CFF, |
|
CFFHeader, |
|
CFFStrings, |
|
CFFIndex, |
|
CFFCharset, |
|
CFFTopDict, |
|
CFFPrivateDict, |
|
CFFCompiler, |
|
};
|
|
|