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Splitting files

Artur Adib 14 years ago
parent
b428552e87
commit
a7278b7fbc
25 changed files with 7581 additions and 7588 deletions
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  1. 7579
      pdf.js
  2. 837
      src/canvas.js
  3. 0
      src/charsets.js
  4. 0
      src/cidmaps.js
  5. 396
      src/colorspace.js
  6. 0
      src/crypto.js
  7. 912
      src/evaluator.js
  8. 265
      src/fonts.js
  9. 300
      src/function.js
  10. 0
      src/glyphlist.js
  11. 251
      src/image.js
  12. 0
      src/metrics.js
  13. 734
      src/obj.js
  14. 630
      src/parser.js
  15. 283
      src/pattern.js
  16. 604
      src/pdf.js
  17. 2070
      src/stream.js
  18. 280
      src/util.js
  19. 0
      src/utils/cffStandardStrings.js
  20. 0
      src/utils/fonts_utils.js
  21. 0
      src/worker/console.js
  22. 0
      src/worker/message_handler.js
  23. 0
      src/worker/pdf_worker_loader.js
  24. 0
      src/worker/processor_handler.js
  25. 28
      web/viewer.html

7579
pdf.js
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837
src/canvas.js
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// <canvas> contexts store most of the state we need natively.
// However, PDF needs a bit more state, which we store here.
var CanvasExtraState = (function canvasExtraState() {
function constructor(old) {
// Are soft masks and alpha values shapes or opacities?
this.alphaIsShape = false;
this.fontSize = 0;
this.textMatrix = 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;
// Color spaces
this.fillColorSpaceObj = null;
this.strokeColorSpaceObj = null;
this.fillColorObj = null;
this.strokeColorObj = null;
// Default fore and background colors
this.fillColor = '#000000';
this.strokeColor = '#000000';
this.old = old;
}
constructor.prototype = {
clone: function canvasextra_clone() {
return Object.create(this);
},
setCurrentPoint: function canvasextra_setCurrentPoint(x, y) {
this.x = x;
this.y = y;
}
};
return constructor;
})();
function ScratchCanvas(width, height) {
var canvas = document.createElement('canvas');
canvas.width = width;
canvas.height = height;
return canvas;
}
var CanvasGraphics = (function canvasGraphics() {
// Defines the time the executeIRQueue is going to be executing
// before it stops and shedules a continue of execution.
var kExecutionTime = 50;
// Number of IR commands to execute before checking
// if we execute longer then `kExecutionTime`.
var kExecutionTimeCheck = 500;
function constructor(canvasCtx, objs) {
this.ctx = canvasCtx;
this.current = new CanvasExtraState();
this.stateStack = [];
this.pendingClip = null;
this.res = null;
this.xobjs = null;
this.ScratchCanvas = ScratchCanvas;
this.objs = objs;
}
var LINE_CAP_STYLES = ['butt', 'round', 'square'];
var LINE_JOIN_STYLES = ['miter', 'round', 'bevel'];
var NORMAL_CLIP = {};
var EO_CLIP = {};
constructor.prototype = {
beginDrawing: function canvasGraphicsBeginDrawing(mediaBox) {
var cw = this.ctx.canvas.width, ch = this.ctx.canvas.height;
this.ctx.save();
switch (mediaBox.rotate) {
case 0:
this.ctx.transform(1, 0, 0, -1, 0, ch);
break;
case 90:
this.ctx.transform(0, 1, 1, 0, 0, 0);
break;
case 180:
this.ctx.transform(-1, 0, 0, 1, cw, 0);
break;
case 270:
this.ctx.transform(0, -1, -1, 0, cw, ch);
break;
}
this.ctx.scale(cw / mediaBox.width, ch / mediaBox.height);
},
executeIRQueue: function canvasGraphicsExecuteIRQueue(codeIR,
executionStartIdx, continueCallback) {
var argsArray = codeIR.argsArray;
var fnArray = codeIR.fnArray;
var i = executionStartIdx || 0;
var argsArrayLen = argsArray.length;
var executionEndIdx;
var startTime = Date.now();
var objs = this.objs;
do {
executionEndIdx = Math.min(argsArrayLen, i + kExecutionTimeCheck);
for (i; i < executionEndIdx; i++) {
if (fnArray[i] !== 'dependency') {
this[fnArray[i]].apply(this, argsArray[i]);
} else {
var deps = argsArray[i];
for (var n = 0; n < deps.length; n++) {
var depObjId = deps[n];
// If the promise isn't resolved yet, add the continueCallback
// to the promise and bail out.
if (!objs.isResolved(depObjId)) {
objs.get(depObjId, continueCallback);
return i;
}
}
}
}
// If the entire IRQueue was executed, stop as were done.
if (i == argsArrayLen) {
return i;
}
// If the execution took longer then a certain amount of time, shedule
// to continue exeution after a short delay.
// However, this is only possible if a 'continueCallback' is passed in.
if (continueCallback && (Date.now() - startTime) > kExecutionTime) {
setTimeout(continueCallback, 0);
return i;
}
// If the IRQueue isn't executed completly yet OR the execution time
// was short enough, do another execution round.
} while (true);
},
endDrawing: function canvasGraphicsEndDrawing() {
this.ctx.restore();
},
// Graphics state
setLineWidth: function canvasGraphicsSetLineWidth(width) {
this.ctx.lineWidth = width;
},
setLineCap: function canvasGraphicsSetLineCap(style) {
this.ctx.lineCap = LINE_CAP_STYLES[style];
},
setLineJoin: function canvasGraphicsSetLineJoin(style) {
this.ctx.lineJoin = LINE_JOIN_STYLES[style];
},
setMiterLimit: function canvasGraphicsSetMiterLimit(limit) {
this.ctx.miterLimit = limit;
},
setDash: function canvasGraphicsSetDash(dashArray, dashPhase) {
this.ctx.mozDash = dashArray;
this.ctx.mozDashOffset = dashPhase;
},
setRenderingIntent: function canvasGraphicsSetRenderingIntent(intent) {
TODO('set rendering intent: ' + intent);
},
setFlatness: function canvasGraphicsSetFlatness(flatness) {
TODO('set flatness: ' + flatness);
},
setGState: function canvasGraphicsSetGState(states) {
for (var i = 0; i < states.length; 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(state[1], state[2]);
break;
}
}
},
save: function canvasGraphicsSave() {
this.ctx.save();
var old = this.current;
this.stateStack.push(old);
this.current = old.clone();
},
restore: function canvasGraphicsRestore() {
var prev = this.stateStack.pop();
if (prev) {
this.current = prev;
this.ctx.restore();
}
},
transform: function canvasGraphicsTransform(a, b, c, d, e, f) {
this.ctx.transform(a, b, c, d, e, f);
},
// Path
moveTo: function canvasGraphicsMoveTo(x, y) {
this.ctx.moveTo(x, y);
this.current.setCurrentPoint(x, y);
},
lineTo: function canvasGraphicsLineTo(x, y) {
this.ctx.lineTo(x, y);
this.current.setCurrentPoint(x, y);
},
curveTo: function canvasGraphicsCurveTo(x1, y1, x2, y2, x3, y3) {
this.ctx.bezierCurveTo(x1, y1, x2, y2, x3, y3);
this.current.setCurrentPoint(x3, y3);
},
curveTo2: function canvasGraphicsCurveTo2(x2, y2, x3, y3) {
var current = this.current;
this.ctx.bezierCurveTo(current.x, current.y, x2, y2, x3, y3);
current.setCurrentPoint(x3, y3);
},
curveTo3: function canvasGraphicsCurveTo3(x1, y1, x3, y3) {
this.curveTo(x1, y1, x3, y3, x3, y3);
this.current.setCurrentPoint(x3, y3);
},
closePath: function canvasGraphicsClosePath() {
this.ctx.closePath();
},
rectangle: function canvasGraphicsRectangle(x, y, width, height) {
this.ctx.rect(x, y, width, height);
},
stroke: function canvasGraphicsStroke() {
var ctx = this.ctx;
var strokeColor = this.current.strokeColor;
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);
ctx.stroke();
ctx.restore();
} else {
ctx.stroke();
}
this.consumePath();
},
closeStroke: function canvasGraphicsCloseStroke() {
this.closePath();
this.stroke();
},
fill: function canvasGraphicsFill() {
var ctx = this.ctx;
var fillColor = this.current.fillColor;
if (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') {
ctx.save();
ctx.fillStyle = fillColor.getPattern(ctx);
ctx.fill();
ctx.restore();
} else {
ctx.fill();
}
this.consumePath();
},
eoFill: function canvasGraphicsEoFill() {
var savedFillRule = this.setEOFillRule();
this.fill();
this.restoreFillRule(savedFillRule);
},
fillStroke: function canvasGraphicsFillStroke() {
var ctx = this.ctx;
var fillColor = this.current.fillColor;
if (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') {
ctx.save();
ctx.fillStyle = fillColor.getPattern(ctx);
ctx.fill();
ctx.restore();
} else {
ctx.fill();
}
var strokeColor = this.current.strokeColor;
if (strokeColor && strokeColor.hasOwnProperty('type') &&
strokeColor.type === 'Pattern') {
ctx.save();
ctx.strokeStyle = strokeColor.getPattern(ctx);
ctx.stroke();
ctx.restore();
} else {
ctx.stroke();
}
this.consumePath();
},
eoFillStroke: function canvasGraphicsEoFillStroke() {
var savedFillRule = this.setEOFillRule();
this.fillStroke();
this.restoreFillRule(savedFillRule);
},
closeFillStroke: function canvasGraphicsCloseFillStroke() {
return this.fillStroke();
},
closeEOFillStroke: function canvasGraphicsCloseEOFillStroke() {
var savedFillRule = this.setEOFillRule();
this.fillStroke();
this.restoreFillRule(savedFillRule);
},
endPath: function canvasGraphicsEndPath() {
this.consumePath();
},
// Clipping
clip: function canvasGraphicsClip() {
this.pendingClip = NORMAL_CLIP;
},
eoClip: function canvasGraphicsEoClip() {
this.pendingClip = EO_CLIP;
},
// Text
beginText: function canvasGraphicsBeginText() {
this.current.textMatrix = IDENTITY_MATRIX;
this.current.x = this.current.lineX = 0;
this.current.y = this.current.lineY = 0;
},
endText: function canvasGraphicsEndText() {
},
setCharSpacing: function canvasGraphicsSetCharSpacing(spacing) {
this.current.charSpacing = spacing;
},
setWordSpacing: function canvasGraphicsSetWordSpacing(spacing) {
this.current.wordSpacing = spacing;
},
setHScale: function canvasGraphicsSetHScale(scale) {
this.current.textHScale = scale / 100;
},
setLeading: function canvasGraphicsSetLeading(leading) {
this.current.leading = -leading;
},
setFont: function canvasGraphicsSetFont(fontRefName, size) {
var fontObj = this.objs.get(fontRefName).fontObj;
if (!fontObj) {
throw 'Can\'t find font for ' + fontRefName;
}
var name = fontObj.loadedName || 'sans-serif';
this.current.font = fontObj;
this.current.fontSize = size;
var name = fontObj.loadedName || 'sans-serif';
var bold = fontObj.black ? (fontObj.bold ? 'bolder' : 'bold') :
(fontObj.bold ? 'bold' : 'normal');
var italic = fontObj.italic ? 'italic' : 'normal';
var serif = fontObj.serif ? 'serif' : 'sans-serif';
var typeface = '"' + name + '", ' + serif;
var rule = italic + ' ' + bold + ' ' + size + 'px ' + typeface;
this.ctx.font = rule;
},
setTextRenderingMode: function canvasGraphicsSetTextRenderingMode(mode) {
TODO('text rendering mode: ' + mode);
},
setTextRise: function canvasGraphicsSetTextRise(rise) {
TODO('text rise: ' + rise);
},
moveText: function canvasGraphicsMoveText(x, y) {
this.current.x = this.current.lineX += x;
this.current.y = this.current.lineY += y;
},
setLeadingMoveText: function canvasGraphicsSetLeadingMoveText(x, y) {
this.setLeading(-y);
this.moveText(x, y);
},
setTextMatrix: function canvasGraphicsSetTextMatrix(a, b, c, d, e, f) {
this.current.textMatrix = [a, b, c, d, e, f];
this.current.x = this.current.lineX = 0;
this.current.y = this.current.lineY = 0;
},
nextLine: function canvasGraphicsNextLine() {
this.moveText(0, this.current.leading);
},
showText: function canvasGraphicsShowText(text) {
var ctx = this.ctx;
var current = this.current;
var font = current.font;
var glyphs = font.charsToGlyphs(text);
var fontSize = current.fontSize;
var charSpacing = current.charSpacing;
var wordSpacing = current.wordSpacing;
var textHScale = current.textHScale;
var glyphsLength = glyphs.length;
if (font.coded) {
ctx.save();
ctx.transform.apply(ctx, current.textMatrix);
ctx.translate(current.x, current.y);
var fontMatrix = font.fontMatrix || IDENTITY_MATRIX;
ctx.scale(1 / textHScale, 1);
for (var i = 0; i < glyphsLength; ++i) {
var glyph = glyphs[i];
if (glyph === null) {
// word break
this.ctx.translate(wordSpacing, 0);
continue;
}
this.save();
ctx.scale(fontSize, fontSize);
ctx.transform.apply(ctx, fontMatrix);
this.executeIRQueue(glyph.IRQueue);
this.restore();
var transformed = Util.applyTransform([glyph.width, 0], fontMatrix);
var width = transformed[0] * fontSize + charSpacing;
ctx.translate(width, 0);
current.x += width;
}
ctx.restore();
} else {
ctx.save();
ctx.transform.apply(ctx, current.textMatrix);
ctx.scale(1, -1);
ctx.translate(current.x, -1 * current.y);
ctx.transform.apply(ctx, font.fontMatrix || IDENTITY_MATRIX);
ctx.scale(1 / textHScale, 1);
var width = 0;
for (var i = 0; i < glyphsLength; ++i) {
var glyph = glyphs[i];
if (glyph === null) {
// word break
width += wordSpacing;
continue;
}
var unicode = glyph.unicode;
var char = (unicode >= 0x10000) ?
String.fromCharCode(0xD800 | ((unicode - 0x10000) >> 10),
0xDC00 | (unicode & 0x3FF)) : String.fromCharCode(unicode);
ctx.fillText(char, width, 0);
width += glyph.width * fontSize * 0.001 + charSpacing;
}
current.x += width;
ctx.restore();
}
},
showSpacedText: function canvasGraphicsShowSpacedText(arr) {
var ctx = this.ctx;
var current = this.current;
var fontSize = current.fontSize;
var textHScale = current.textHScale;
var arrLength = arr.length;
for (var i = 0; i < arrLength; ++i) {
var e = arr[i];
if (isNum(e)) {
current.x -= e * 0.001 * fontSize * textHScale;
} else if (isString(e)) {
this.showText(e);
} else {
malformed('TJ array element ' + e + ' is not string or num');
}
}
},
nextLineShowText: function canvasGraphicsNextLineShowText(text) {
this.nextLine();
this.showText(text);
},
nextLineSetSpacingShowText:
function canvasGraphicsNextLineSetSpacingShowText(wordSpacing,
charSpacing,
text) {
this.setWordSpacing(wordSpacing);
this.setCharSpacing(charSpacing);
this.nextLineShowText(text);
},
// Type3 fonts
setCharWidth: function canvasGraphicsSetCharWidth(xWidth, yWidth) {
// We can safely ignore this since the width should be the same
// as the width in the Widths array.
},
setCharWidthAndBounds: function canvasGraphicsSetCharWidthAndBounds(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.rectangle(llx, lly, urx - llx, ury - lly);
this.clip();
this.endPath();
},
// Color
setStrokeColorSpace:
function canvasGraphicsSetStrokeColorSpacefunction(raw) {
this.current.strokeColorSpace = ColorSpace.fromIR(raw);
},
setFillColorSpace: function canvasGraphicsSetFillColorSpace(raw) {
this.current.fillColorSpace = ColorSpace.fromIR(raw);
},
setStrokeColor: function canvasGraphicsSetStrokeColor(/*...*/) {
var cs = this.current.strokeColorSpace;
var color = cs.getRgb(arguments);
this.setStrokeRGBColor.apply(this, color);
},
getColorN_IR_Pattern: function(IR, cs) {
if (IR[0] == 'TilingPattern') {
var args = IR[1];
var base = cs.base;
var color;
if (base) {
var baseComps = base.numComps;
color = [];
for (var i = 0; i < baseComps; ++i)
color.push(args[i]);
color = base.getRgb(color);
}
var pattern = new TilingPattern(IR, color, this.ctx, this.objs);
} else if (IR[0] == 'RadialAxialShading' || IR[0] == 'DummyShading') {
var pattern = Pattern.shadingFromIR(this.ctx, IR);
} else {
throw 'Unkown IR type';
}
return pattern;
},
setStrokeColorN_IR: function canvasGraphicsSetStrokeColorN(/*...*/) {
var cs = this.current.strokeColorSpace;
if (cs.name == 'Pattern') {
this.current.strokeColor = this.getColorN_IR_Pattern(arguments, cs);
} else {
this.setStrokeColor.apply(this, arguments);
}
},
setFillColor: function canvasGraphicsSetFillColor(/*...*/) {
var cs = this.current.fillColorSpace;
var color = cs.getRgb(arguments);
this.setFillRGBColor.apply(this, color);
},
setFillColorN_IR: function canvasGraphicsSetFillColorN(/*...*/) {
var cs = this.current.fillColorSpace;
if (cs.name == 'Pattern') {
this.current.fillColor = this.getColorN_IR_Pattern(arguments, cs);
} else {
this.setFillColor.apply(this, arguments);
}
},
setStrokeGray: function canvasGraphicsSetStrokeGray(gray) {
this.setStrokeRGBColor(gray, gray, gray);
},
setFillGray: function canvasGraphicsSetFillGray(gray) {
this.setFillRGBColor(gray, gray, gray);
},
setStrokeRGBColor: function canvasGraphicsSetStrokeRGBColor(r, g, b) {
var color = Util.makeCssRgb(r, g, b);
this.ctx.strokeStyle = color;
this.current.strokeColor = color;
},
setFillRGBColor: function canvasGraphicsSetFillRGBColor(r, g, b) {
var color = Util.makeCssRgb(r, g, b);
this.ctx.fillStyle = color;
this.current.fillColor = color;
},
setStrokeCMYKColor: function canvasGraphicsSetStrokeCMYKColor(c, m, y, k) {
var color = Util.makeCssCmyk(c, m, y, k);
this.ctx.strokeStyle = color;
this.current.strokeColor = color;
},
setFillCMYKColor: function canvasGraphicsSetFillCMYKColor(c, m, y, k) {
var color = Util.makeCssCmyk(c, m, y, k);
this.ctx.fillStyle = color;
this.current.fillColor = color;
},
shadingFill: function canvasGraphicsShadingFill(patternIR) {
var ctx = this.ctx;
this.save();
ctx.fillStyle = Pattern.shadingFromIR(ctx, patternIR);
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, width], inv);
var ul = Util.applyTransform([height, 0], inv);
var ur = Util.applyTransform([height, width], 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 canvasGraphicsBeginInlineImage() {
error('Should not call beginInlineImage');
},
beginImageData: function canvasGraphicsBeginImageData() {
error('Should not call beginImageData');
},
paintFormXObjectBegin:
function canvasGraphicsPaintFormXObject(matrix, bbox) {
this.save();
if (matrix && isArray(matrix) && 6 == matrix.length)
this.transform.apply(this, matrix);
if (bbox && isArray(bbox) && 4 == bbox.length) {
var width = bbox[2] - bbox[0];
var height = bbox[3] - bbox[1];
this.rectangle(bbox[0], bbox[1], width, height);
this.clip();
this.endPath();
}
},
paintFormXObjectEnd: function() {
this.restore();
},
paintJpegXObject: function(objId, w, h) {
var image = this.objs.get(objId);
if (!image) {
error('Dependent image isn\'t ready yet');
}
this.save();
var ctx = this.ctx;
// scale the image to the unit square
ctx.scale(1 / w, -1 / h);
var domImage = image.getImage();
ctx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
0, -h, w, h);
this.restore();
},
paintImageMaskXObject: function(imgArray, inverseDecode, width, height) {
function applyStencilMask(buffer, inverseDecode) {
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) == inverseDecode) {
buffer[bufferPos] = 0;
}
bufferPos += 4;
mask >>= 1;
}
}
}
this.save();
var ctx = this.ctx;
var w = width, h = height;
// scale the image to the unit square
ctx.scale(1 / w, -1 / h);
var tmpCanvas = new this.ScratchCanvas(w, h);
var tmpCtx = tmpCanvas.getContext('2d');
var fillColor = this.current.fillColor;
tmpCtx.fillStyle = (fillColor && fillColor.hasOwnProperty('type') &&
fillColor.type === 'Pattern') ?
fillColor.getPattern(tmpCtx) : fillColor;
tmpCtx.fillRect(0, 0, w, h);
var imgData = tmpCtx.getImageData(0, 0, w, h);
var pixels = imgData.data;
applyStencilMask(pixels, inverseDecode);
tmpCtx.putImageData(imgData, 0, 0);
ctx.drawImage(tmpCanvas, 0, -h);
this.restore();
},
paintImageXObject: function(imgData) {
this.save();
var ctx = this.ctx;
var w = imgData.width;
var h = imgData.height;
// scale the image to the unit square
ctx.scale(1 / w, -1 / h);
var tmpCanvas = new this.ScratchCanvas(w, h);
var tmpCtx = tmpCanvas.getContext('2d');
var tmpImgData;
// Some browsers can set an UInt8Array directly as imageData, some
// can't. As long as we don't have proper feature detection, just
// copy over each pixel and set the imageData that way.
tmpImgData = tmpCtx.getImageData(0, 0, w, h);
// Copy over the imageData.
var tmpImgDataPixels = tmpImgData.data;
var len = tmpImgDataPixels.length;
while (len--) {
tmpImgDataPixels[len] = imgData.data[len];
}
tmpCtx.putImageData(tmpImgData, 0, 0);
ctx.drawImage(tmpCanvas, 0, -h);
this.restore();
},
// Marked content
markPoint: function canvasGraphicsMarkPoint(tag) {
TODO('Marked content');
},
markPointProps: function canvasGraphicsMarkPointProps(tag, properties) {
TODO('Marked content');
},
beginMarkedContent: function canvasGraphicsBeginMarkedContent(tag) {
TODO('Marked content');
},
beginMarkedContentProps:
function canvasGraphicsBeginMarkedContentProps(tag, properties) {
TODO('Marked content');
},
endMarkedContent: function canvasGraphicsEndMarkedContent() {
TODO('Marked content');
},
// Compatibility
beginCompat: function canvasGraphicsBeginCompat() {
TODO('ignore undefined operators (should we do that anyway?)');
},
endCompat: function canvasGraphicsEndCompat() {
TODO('stop ignoring undefined operators');
},
// Helper functions
consumePath: function canvasGraphicsConsumePath() {
if (this.pendingClip) {
var savedFillRule = null;
if (this.pendingClip == EO_CLIP)
savedFillRule = this.setEOFillRule();
this.ctx.clip();
this.pendingClip = null;
if (savedFillRule !== null)
this.restoreFillRule(savedFillRule);
}
this.ctx.beginPath();
},
// We generally keep the canvas context set for
// nonzero-winding, and just set evenodd for the operations
// that need them.
setEOFillRule: function canvasGraphicsSetEOFillRule() {
var savedFillRule = this.ctx.mozFillRule;
this.ctx.mozFillRule = 'evenodd';
return savedFillRule;
},
restoreFillRule: function canvasGraphicsRestoreFillRule(rule) {
this.ctx.mozFillRule = rule;
}
};
return constructor;
})();

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src/colorspace.js
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var ColorSpace = (function colorSpaceColorSpace() {
// Constructor should define this.numComps, this.defaultColor, this.name
function constructor() {
error('should not call ColorSpace constructor');
}
constructor.prototype = {
// Input: array of size numComps representing color component values
// Output: array of rgb values, each value ranging from [0.1]
getRgb: function cs_getRgb(color) {
error('Should not call ColorSpace.getRgb: ' + color);
},
// Input: Uint8Array of component values, each value scaled to [0,255]
// Output: Uint8Array of rgb values, each value scaled to [0,255]
getRgbBuffer: function cs_getRgbBuffer(input) {
error('Should not call ColorSpace.getRgbBuffer: ' + input);
}
};
constructor.parse = function colorspace_parse(cs, xref, res) {
var IR = constructor.parseToIR(cs, xref, res, true);
if (IR instanceof SeparationCS)
return IR;
return constructor.fromIR(IR);
};
constructor.fromIR = function(IR) {
var name;
if (isArray(IR)) {
name = IR[0];
} else {
name = IR;
}
switch (name) {
case 'DeviceGrayCS':
return new DeviceGrayCS();
case 'DeviceRgbCS':
return new DeviceRgbCS();
case 'DeviceCmykCS':
return new DeviceCmykCS();
case 'PatternCS':
var baseCS = IR[1];
if (baseCS == null) {
return new PatternCS(null);
} else {
return new PatternCS(ColorSpace.fromIR(baseCS));
}
case 'IndexedCS':
var baseCS = IR[1];
var hiVal = IR[2];
var lookup = IR[3];
return new IndexedCS(ColorSpace.fromIR(baseCS), hiVal, lookup);
case 'SeparationCS':
var alt = IR[1];
var tintFnIR = IR[2];
return new SeparationCS(
ColorSpace.fromIR(alt),
PDFFunction.fromIR(tintFnIR)
);
default:
error('Unkown name ' + name);
}
return null;
}
constructor.parseToIR = function colorspace_parse(cs, xref, res, parseOnly) {
if (isName(cs)) {
var colorSpaces = xref.fetchIfRef(res.get('ColorSpace'));
if (isDict(colorSpaces)) {
var refcs = colorSpaces.get(cs.name);
if (refcs)
cs = refcs;
}
}
cs = xref.fetchIfRef(cs);
if (isName(cs)) {
var mode = cs.name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'Pattern':
return ['PatternCS', null];
default:
error('unrecognized colorspace ' + mode);
}
} else if (isArray(cs)) {
var mode = cs[0].name;
this.mode = mode;
switch (mode) {
case 'DeviceGray':
case 'G':
return 'DeviceGrayCS';
case 'DeviceRGB':
case 'RGB':
return 'DeviceRgbCS';
case 'DeviceCMYK':
case 'CMYK':
return 'DeviceCmykCS';
case 'CalGray':
return 'DeviceGrayCS';
case 'CalRGB':
return 'DeviceRgbCS';
case 'ICCBased':
var stream = xref.fetchIfRef(cs[1]);
var dict = stream.dict;
var numComps = dict.get('N');
if (numComps == 1)
return 'DeviceGrayCS';
if (numComps == 3)
return 'DeviceRgbCS';
if (numComps == 4)
return 'DeviceCmykCS';
break;
case 'Pattern':
var baseCS = cs[1];
if (baseCS)
baseCS = ColorSpace.parseToIR(baseCS, xref, res);
return ['PatternCS', baseCS];
case 'Indexed':
var baseCS = ColorSpace.parseToIR(cs[1], xref, res);
var hiVal = cs[2] + 1;
var lookup = xref.fetchIfRef(cs[3]);
return ['IndexedCS', baseCS, hiVal, lookup];
case 'Separation':
var alt = ColorSpace.parseToIR(cs[2], xref, res);
var tintFnIR = PDFFunction.getIR(xref, xref.fetchIfRef(cs[3]));
return ['SeparationCS', alt, tintFnIR];
case 'Lab':
case 'DeviceN':
default:
error('unimplemented color space object "' + mode + '"');
}
} else {
error('unrecognized color space object: "' + cs + '"');
}
return null;
};
return constructor;
})();
var SeparationCS = (function separationCS() {
function constructor(base, tintFn) {
this.name = 'Separation';
this.numComps = 1;
this.defaultColor = [1];
this.base = base;
this.tintFn = tintFn;
}
constructor.prototype = {
getRgb: function sepcs_getRgb(color) {
var tinted = this.tintFn(color);
return this.base.getRgb(tinted);
},
getRgbBuffer: function sepcs_getRgbBuffer(input, bits) {
var tintFn = this.tintFn;
var base = this.base;
var scale = 1 / ((1 << bits) - 1);
var length = input.length;
var pos = 0;
var numComps = base.numComps;
var baseBuf = new Uint8Array(numComps * length);
for (var i = 0; i < length; ++i) {
var scaled = input[i] * scale;
var tinted = tintFn([scaled]);
for (var j = 0; j < numComps; ++j)
baseBuf[pos++] = 255 * tinted[j];
}
return base.getRgbBuffer(baseBuf, 8);
}
};
return constructor;
})();
var PatternCS = (function patternCS() {
function constructor(baseCS) {
this.name = 'Pattern';
this.base = baseCS;
}
constructor.prototype = {};
return constructor;
})();
var IndexedCS = (function indexedCS() {
function constructor(base, highVal, lookup) {
this.name = 'Indexed';
this.numComps = 1;
this.defaultColor = [0];
this.base = base;
var baseNumComps = base.numComps;
this.highVal = highVal;
var length = baseNumComps * highVal;
var lookupArray = new Uint8Array(length);
if (isStream(lookup)) {
var bytes = lookup.getBytes(length);
lookupArray.set(bytes);
} else if (isString(lookup)) {
for (var i = 0; i < length; ++i)
lookupArray[i] = lookup.charCodeAt(i);
} else {
error('Unrecognized lookup table: ' + lookup);
}
this.lookup = lookupArray;
}
constructor.prototype = {
getRgb: function indexcs_getRgb(color) {
var numComps = this.base.numComps;
var start = color[0] * numComps;
var c = [];
for (var i = start, ii = start + numComps; i < ii; ++i)
c.push(this.lookup[i]);
return this.base.getRgb(c);
},
getRgbBuffer: function indexcs_getRgbBuffer(input) {
var base = this.base;
var numComps = base.numComps;
var lookup = this.lookup;
var length = input.length;
var baseBuf = new Uint8Array(length * numComps);
var baseBufPos = 0;
for (var i = 0; i < length; ++i) {
var lookupPos = input[i] * numComps;
for (var j = 0; j < numComps; ++j) {
baseBuf[baseBufPos++] = lookup[lookupPos + j];
}
}
return base.getRgbBuffer(baseBuf, 8);
}
};
return constructor;
})();
var DeviceGrayCS = (function deviceGrayCS() {
function constructor() {
this.name = 'DeviceGray';
this.numComps = 1;
this.defaultColor = [0];
}
constructor.prototype = {
getRgb: function graycs_getRgb(color) {
var c = color[0];
return [c, c, c];
},
getRgbBuffer: function graycs_getRgbBuffer(input, bits) {
var scale = 255 / ((1 << bits) - 1);
var length = input.length;
var rgbBuf = new Uint8Array(length * 3);
for (var i = 0, j = 0; i < length; ++i) {
var c = (scale * input[i]) | 0;
rgbBuf[j++] = c;
rgbBuf[j++] = c;
rgbBuf[j++] = c;
}
return rgbBuf;
}
};
return constructor;
})();
var DeviceRgbCS = (function deviceRgbCS() {
function constructor(bits) {
this.name = 'DeviceRGB';
this.numComps = 3;
this.defaultColor = [0, 0, 0];
}
constructor.prototype = {
getRgb: function rgbcs_getRgb(color) {
return color;
},
getRgbBuffer: function rgbcs_getRgbBuffer(input, bits) {
if (bits == 8)
return input;
var scale = 255 / ((1 << bits) - 1);
var i, length = input.length;
var rgbBuf = new Uint8Array(length);
for (i = 0; i < length; ++i)
rgbBuf[i] = (scale * input[i]) | 0;
return rgbBuf;
}
};
return constructor;
})();
var DeviceCmykCS = (function deviceCmykCS() {
function constructor() {
this.name = 'DeviceCMYK';
this.numComps = 4;
this.defaultColor = [0, 0, 0, 1];
}
constructor.prototype = {
getRgb: function cmykcs_getRgb(color) {
var c = color[0], m = color[1], y = color[2], k = color[3];
var c1 = 1 - c, m1 = 1 - m, y1 = 1 - y, k1 = 1 - k;
var x, r, g, b;
// this is a matrix multiplication, unrolled for performance
// code is taken from the poppler implementation
x = c1 * m1 * y1 * k1; // 0 0 0 0
r = g = b = x;
x = c1 * m1 * y1 * k; // 0 0 0 1
r += 0.1373 * x;
g += 0.1216 * x;
b += 0.1255 * x;
x = c1 * m1 * y * k1; // 0 0 1 0
r += x;
g += 0.9490 * x;
x = c1 * m1 * y * k; // 0 0 1 1
r += 0.1098 * x;
g += 0.1020 * x;
x = c1 * m * y1 * k1; // 0 1 0 0
r += 0.9255 * x;
b += 0.5490 * x;
x = c1 * m * y1 * k; // 0 1 0 1
r += 0.1412 * x;
x = c1 * m * y * k1; // 0 1 1 0
r += 0.9294 * x;
g += 0.1098 * x;
b += 0.1412 * x;
x = c1 * m * y * k; // 0 1 1 1
r += 0.1333 * x;
x = c * m1 * y1 * k1; // 1 0 0 0
g += 0.6784 * x;
b += 0.9373 * x;
x = c * m1 * y1 * k; // 1 0 0 1
g += 0.0588 * x;
b += 0.1412 * x;
x = c * m1 * y * k1; // 1 0 1 0
g += 0.6510 * x;
b += 0.3137 * x;
x = c * m1 * y * k; // 1 0 1 1
g += 0.0745 * x;
x = c * m * y1 * k1; // 1 1 0 0
r += 0.1804 * x;
g += 0.1922 * x;
b += 0.5725 * x;
x = c * m * y1 * k; // 1 1 0 1
b += 0.0078 * x;
x = c * m * y * k1; // 1 1 1 0
r += 0.2118 * x;
g += 0.2119 * x;
b += 0.2235 * x;
return [r, g, b];
},
getRgbBuffer: function cmykcs_getRgbBuffer(colorBuf, bits) {
var scale = 1 / ((1 << bits) - 1);
var length = colorBuf.length / 4;
var rgbBuf = new Uint8Array(length * 3);
var rgbBufPos = 0;
var colorBufPos = 0;
for (var i = 0; i < length; i++) {
var cmyk = [];
for (var j = 0; j < 4; ++j)
cmyk.push(scale * colorBuf[colorBufPos++]);
var rgb = this.getRgb(cmyk);
for (var j = 0; j < 3; ++j)
rgbBuf[rgbBufPos++] = Math.round(rgb[j] * 255);
}
return rgbBuf;
}
};
return constructor;
})();

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src/evaluator.js
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var PartialEvaluator = (function partialEvaluator() {
function constructor(xref, handler, uniquePrefix) {
this.state = new EvalState();
this.stateStack = [];
this.xref = xref;
this.handler = handler;
this.uniquePrefix = uniquePrefix;
this.objIdCounter = 0;
}
var OP_MAP = {
// Graphics state
w: 'setLineWidth',
J: 'setLineCap',
j: 'setLineJoin',
M: 'setMiterLimit',
d: 'setDash',
ri: 'setRenderingIntent',
i: 'setFlatness',
gs: 'setGState',
q: 'save',
Q: 'restore',
cm: 'transform',
// Path
m: 'moveTo',
l: 'lineTo',
c: 'curveTo',
v: 'curveTo2',
y: 'curveTo3',
h: 'closePath',
re: 'rectangle',
S: 'stroke',
s: 'closeStroke',
f: 'fill',
F: 'fill',
'f*': 'eoFill',
B: 'fillStroke',
'B*': 'eoFillStroke',
b: 'closeFillStroke',
'b*': 'closeEOFillStroke',
n: 'endPath',
// Clipping
W: 'clip',
'W*': 'eoClip',
// Text
BT: 'beginText',
ET: 'endText',
Tc: 'setCharSpacing',
Tw: 'setWordSpacing',
Tz: 'setHScale',
TL: 'setLeading',
Tf: 'setFont',
Tr: 'setTextRenderingMode',
Ts: 'setTextRise',
Td: 'moveText',
TD: 'setLeadingMoveText',
Tm: 'setTextMatrix',
'T*': 'nextLine',
Tj: 'showText',
TJ: 'showSpacedText',
"'": 'nextLineShowText',
'"': 'nextLineSetSpacingShowText',
// Type3 fonts
d0: 'setCharWidth',
d1: 'setCharWidthAndBounds',
// Color
CS: 'setStrokeColorSpace',
cs: 'setFillColorSpace',
SC: 'setStrokeColor',
SCN: 'setStrokeColorN',
sc: 'setFillColor',
scn: 'setFillColorN',
G: 'setStrokeGray',
g: 'setFillGray',
RG: 'setStrokeRGBColor',
rg: 'setFillRGBColor',
K: 'setStrokeCMYKColor',
k: 'setFillCMYKColor',
// Shading
sh: 'shadingFill',
// Images
BI: 'beginInlineImage',
ID: 'beginImageData',
EI: 'endInlineImage',
// XObjects
Do: 'paintXObject',
// Marked content
MP: 'markPoint',
DP: 'markPointProps',
BMC: 'beginMarkedContent',
BDC: 'beginMarkedContentProps',
EMC: 'endMarkedContent',
// Compatibility
BX: 'beginCompat',
EX: 'endCompat'
};
constructor.prototype = {
getIRQueue: function partialEvaluatorGetIRQueue(stream, resources,
queue, dependency) {
var self = this;
var xref = this.xref;
var handler = this.handler;
var uniquePrefix = this.uniquePrefix;
function insertDependency(depList) {
fnArray.push('dependency');
argsArray.push(depList);
for (var i = 0; i < depList.length; i++) {
var dep = depList[i];
if (dependency.indexOf(dep) == -1) {
dependency.push(depList[i]);
}
}
}
function handleSetFont(fontName, fontRef) {
var loadedName = null;
var fontRes = resources.get('Font');
// TODO: TOASK: Is it possible to get here? If so, what does
// args[0].name should be like???
assert(fontRes, 'fontRes not available');
fontRes = xref.fetchIfRef(fontRes);
fontRef = fontRef || fontRes.get(fontName);
var font = xref.fetchIfRef(fontRef);
assertWellFormed(isDict(font));
if (!font.translated) {
font.translated = self.translateFont(font, xref, resources, handler,
uniquePrefix, dependency);
if (font.translated) {
// keep track of each font we translated so the caller can
// load them asynchronously before calling display on a page
loadedName = 'font_' + uniquePrefix + ++self.objIdCounter;
font.translated.properties.loadedName = loadedName;
font.loadedName = loadedName;
var translated = font.translated;
handler.send('obj', [
loadedName,
'Font',
translated.name,
translated.file,
translated.properties
]);
}
}
loadedName = loadedName || font.loadedName;
// Ensure the font is ready before the font is set
// and later on used for drawing.
// TODO: This should get insert to the IRQueue only once per
// page.
insertDependency([loadedName]);
return loadedName;
}
function buildPaintImageXObject(image, inline) {
var dict = image.dict;
var w = dict.get('Width', 'W');
var h = dict.get('Height', 'H');
if (image instanceof JpegStream) {
var objId = 'img_' + uniquePrefix + ++self.objIdCounter;
handler.send('obj', [objId, 'JpegStream', image.getIR()]);
// Add the dependency on the image object.
insertDependency([objId]);
// The normal fn.
fn = 'paintJpegXObject';
args = [objId, w, h];
return;
}
// Needs to be rendered ourself.
// Figure out if the image has an imageMask.
var imageMask = dict.get('ImageMask', 'IM') || false;
// If there is no imageMask, create the PDFImage and a lot
// of image processing can be done here.
if (!imageMask) {
var imageObj = new PDFImage(xref, resources, image, inline);
if (imageObj.imageMask) {
throw 'Can\'t handle this in the web worker :/';
}
var imgData = {
width: w,
height: h,
data: new Uint8Array(w * h * 4)
};
var pixels = imgData.data;
imageObj.fillRgbaBuffer(pixels, imageObj.decode);
fn = 'paintImageXObject';
args = [imgData];
return;
}
// This depends on a tmpCanvas beeing filled with the
// current fillStyle, such that processing the pixel
// data can't be done here. Instead of creating a
// complete PDFImage, only read the information needed
// for later.
fn = 'paintImageMaskXObject';
var width = dict.get('Width', 'W');
var height = dict.get('Height', 'H');
var bitStrideLength = (width + 7) >> 3;
var imgArray = image.getBytes(bitStrideLength * height);
var decode = dict.get('Decode', 'D');
var inverseDecode = !!decode && decode[0] > 0;
args = [imgArray, inverseDecode, width, height];
}
uniquePrefix = uniquePrefix || '';
if (!queue.argsArray) {
queue.argsArray = [];
}
if (!queue.fnArray) {
queue.fnArray = [];
}
var fnArray = queue.fnArray, argsArray = queue.argsArray;
var dependency = dependency || [];
resources = xref.fetchIfRef(resources) || new Dict();
var xobjs = xref.fetchIfRef(resources.get('XObject')) || new Dict();
var patterns = xref.fetchIfRef(resources.get('Pattern')) || new Dict();
var parser = new Parser(new Lexer(stream), false);
var res = resources;
var args = [], obj;
var getObjBt = function getObjBt() {
parser = this.oldParser;
return { name: 'BT' };
};
var TILING_PATTERN = 1, SHADING_PATTERN = 2;
while (!isEOF(obj = parser.getObj())) {
if (isCmd(obj)) {
var cmd = obj.cmd;
var fn = OP_MAP[cmd];
if (!fn) {
// invalid content command, trying to recover
if (cmd.substr(-2) == 'BT') {
fn = OP_MAP[cmd.substr(0, cmd.length - 2)];
// feeding 'BT' on next interation
parser = {
getObj: getObjBt,
oldParser: parser
};
}
}
assertWellFormed(fn, 'Unknown command "' + cmd + '"');
// TODO figure out how to type-check vararg functions
if ((cmd == 'SCN' || cmd == 'scn') && !args[args.length - 1].code) {
// Use the IR version for setStroke/FillColorN.
fn += '_IR';
// compile tiling patterns
var patternName = args[args.length - 1];
// SCN/scn applies patterns along with normal colors
if (isName(patternName)) {
var pattern = xref.fetchIfRef(patterns.get(patternName.name));
if (pattern) {
var dict = isStream(pattern) ? pattern.dict : pattern;
var typeNum = dict.get('PatternType');
if (typeNum == TILING_PATTERN) {
// Create an IR of the pattern code.
var depIdx = dependency.length;
var codeIR = this.getIRQueue(pattern,
dict.get('Resources'), {}, dependency);
// Add the dependencies that are required to execute the
// codeIR.
insertDependency(dependency.slice(depIdx));
args = TilingPattern.getIR(codeIR, dict, args);
}
else if (typeNum == SHADING_PATTERN) {
var shading = xref.fetchIfRef(dict.get('Shading'));
var matrix = dict.get('Matrix');
var pattern = Pattern.parseShading(shading, matrix, xref, res,
null /*ctx*/);
args = pattern.getIR();
} else {
error('Unkown PatternType ' + typeNum);
}
}
}
} else if (cmd == 'Do' && !args[0].code) {
// eagerly compile XForm objects
var name = args[0].name;
var xobj = xobjs.get(name);
if (xobj) {
xobj = xref.fetchIfRef(xobj);
assertWellFormed(isStream(xobj), 'XObject should be a stream');
var type = xobj.dict.get('Subtype');
assertWellFormed(
isName(type),
'XObject should have a Name subtype'
);
if ('Form' == type.name) {
var matrix = xobj.dict.get('Matrix');
var bbox = xobj.dict.get('BBox');
fnArray.push('paintFormXObjectBegin');
argsArray.push([matrix, bbox]);
// This adds the IRQueue of the xObj to the current queue.
var depIdx = dependency.length;
this.getIRQueue(xobj, xobj.dict.get('Resources'), queue,
dependency);
// Add the dependencies that are required to execute the
// codeIR.
insertDependency(dependency.slice(depIdx));
fn = 'paintFormXObjectEnd';
args = [];
} else if ('Image' == type.name) {
buildPaintImageXObject(xobj, false);
} else {
error('Unhandled XObject subtype ' + type.name);
}
}
} else if (cmd == 'Tf') { // eagerly collect all fonts
args[0] = handleSetFont(args[0].name);
} else if (cmd == 'EI') {
buildPaintImageXObject(args[0], true);
}
switch (fn) {
// Parse the ColorSpace data to a raw format.
case 'setFillColorSpace':
case 'setStrokeColorSpace':
args = [ColorSpace.parseToIR(args[0], xref, resources)];
break;
case 'shadingFill':
var shadingRes = xref.fetchIfRef(res.get('Shading'));
if (!shadingRes)
error('No shading resource found');
var shading = xref.fetchIfRef(shadingRes.get(args[0].name));
if (!shading)
error('No shading object found');
var shadingFill = Pattern.parseShading(shading, null, xref, res,
null);
var patternIR = shadingFill.getIR();
args = [patternIR];
fn = 'shadingFill';
break;
case 'setGState':
var dictName = args[0];
var extGState = xref.fetchIfRef(resources.get('ExtGState'));
if (!isDict(extGState) || !extGState.has(dictName.name))
break;
var gsState = xref.fetchIfRef(extGState.get(dictName.name));
// This array holds the converted/processed state data.
var gsStateObj = [];
gsState.forEach(
function canvasGraphicsSetGStateForEach(key, value) {
switch (key) {
case 'Type':
break;
case 'LW':
case 'LC':
case 'LJ':
case 'ML':
case 'D':
case 'RI':
case 'FL':
gsStateObj.push([key, value]);
break;
case 'Font':
gsStateObj.push([
'Font',
handleSetFont(null, value[0]),
value[1]
]);
break;
case 'OP':
case 'op':
case 'OPM':
case 'BG':
case 'BG2':
case 'UCR':
case 'UCR2':
case 'TR':
case 'TR2':
case 'HT':
case 'SM':
case 'SA':
case 'BM':
case 'SMask':
case 'CA':
case 'ca':
case 'AIS':
case 'TK':
TODO('graphic state operator ' + key);
break;
default:
warn('Unknown graphic state operator ' + key);
break;
}
}
);
args = [gsStateObj];
break;
} // switch
fnArray.push(fn);
argsArray.push(args);
args = [];
} else if (obj != null) {
assertWellFormed(args.length <= 33, 'Too many arguments');
args.push(obj);
}
}
return {
fnArray: fnArray,
argsArray: argsArray
};
},
extractEncoding: function partialEvaluatorExtractEncoding(dict,
xref,
properties) {
var type = properties.type, encoding;
if (properties.composite) {
var defaultWidth = xref.fetchIfRef(dict.get('DW')) || 1000;
properties.defaultWidth = defaultWidth;
var glyphsWidths = {};
var widths = xref.fetchIfRef(dict.get('W'));
if (widths) {
var start = 0, end = 0;
for (var i = 0; i < widths.length; i++) {
var code = widths[i];
if (isArray(code)) {
for (var j = 0; j < code.length; j++)
glyphsWidths[start++] = code[j];
start = 0;
} else if (start) {
var width = widths[++i];
for (var j = start; j <= code; j++)
glyphsWidths[j] = width;
start = 0;
} else {
start = code;
}
}
}
properties.widths = glyphsWidths;
// Glyph ids are big-endian 2-byte values
encoding = properties.encoding;
// CIDSystemInfo might help to match width and glyphs
var cidSystemInfo = dict.get('CIDSystemInfo');
if (isDict(cidSystemInfo)) {
properties.cidSystemInfo = {
registry: cidSystemInfo.get('Registry'),
ordering: cidSystemInfo.get('Ordering'),
supplement: cidSystemInfo.get('Supplement')
};
}
var cidToGidMap = dict.get('CIDToGIDMap');
if (!cidToGidMap || !isRef(cidToGidMap)) {
return Object.create(GlyphsUnicode);
}
// Extract the encoding from the CIDToGIDMap
var glyphsStream = xref.fetchIfRef(cidToGidMap);
var glyphsData = glyphsStream.getBytes(0);
// Set encoding 0 to later verify the font has an encoding
encoding[0] = { unicode: 0, width: 0 };
for (var j = 0; j < glyphsData.length; j++) {
var glyphID = (glyphsData[j++] << 8) | glyphsData[j];
if (glyphID == 0)
continue;
var code = j >> 1;
var width = glyphsWidths[code];
encoding[code] = {
unicode: glyphID,
width: isNum(width) ? width : defaultWidth
};
}
return Object.create(GlyphsUnicode);
}
var differences = properties.differences;
var map = properties.encoding;
var baseEncoding = null;
if (dict.has('Encoding')) {
encoding = xref.fetchIfRef(dict.get('Encoding'));
if (isDict(encoding)) {
var baseName = encoding.get('BaseEncoding');
if (baseName)
baseEncoding = Encodings[baseName.name].slice();
// Load the differences between the base and original
if (encoding.has('Differences')) {
var diffEncoding = encoding.get('Differences');
var index = 0;
for (var j = 0; j < diffEncoding.length; j++) {
var data = diffEncoding[j];
if (isNum(data))
index = data;
else
differences[index++] = data.name;
}
}
} else if (isName(encoding)) {
baseEncoding = Encodings[encoding.name].slice();
} else {
error('Encoding is not a Name nor a Dict');
}
}
if (!baseEncoding) {
switch (type) {
case 'TrueType':
baseEncoding = Encodings.WinAnsiEncoding.slice();
break;
case 'Type1':
case 'Type3':
baseEncoding = Encodings.StandardEncoding.slice();
break;
default:
warn('Unknown type of font: ' + type);
baseEncoding = [];
break;
}
}
// merge in the differences
var firstChar = properties.firstChar;
var lastChar = properties.lastChar;
var widths = properties.widths || [];
var glyphs = {};
for (var i = firstChar; i <= lastChar; i++) {
var glyph = differences[i];
var replaceGlyph = true;
if (!glyph) {
glyph = baseEncoding[i] || i;
replaceGlyph = false;
}
var index = GlyphsUnicode[glyph] || i;
var width = widths[i] || widths[glyph];
map[i] = {
unicode: index,
width: isNum(width) ? width : properties.defaultWidth
};
if (replaceGlyph || !glyphs[glyph])
glyphs[glyph] = map[i];
if (replaceGlyph || !glyphs[index])
glyphs[index] = map[i];
// If there is no file, the character mapping can't be modified
// but this is unlikely that there is any standard encoding with
// chars below 0x1f, so that's fine.
if (!properties.file)
continue;
if (index <= 0x1f || (index >= 127 && index <= 255))
map[i].unicode += kCmapGlyphOffset;
}
if (type == 'TrueType' && dict.has('ToUnicode') && differences) {
var cmapObj = dict.get('ToUnicode');
if (isRef(cmapObj)) {
cmapObj = xref.fetch(cmapObj);
}
if (isName(cmapObj)) {
error('ToUnicode file cmap translation not implemented');
} else if (isStream(cmapObj)) {
var tokens = [];
var token = '';
var beginArrayToken = {};
var cmap = cmapObj.getBytes(cmapObj.length);
for (var i = 0; i < cmap.length; i++) {
var byte = cmap[i];
if (byte == 0x20 || byte == 0x0D || byte == 0x0A ||
byte == 0x3C || byte == 0x5B || byte == 0x5D) {
switch (token) {
case 'usecmap':
error('usecmap is not implemented');
break;
case 'beginbfchar':
case 'beginbfrange':
case 'begincidchar':
case 'begincidrange':
token = '';
tokens = [];
break;
case 'endcidrange':
case 'endbfrange':
for (var j = 0; j < tokens.length; j += 3) {
var startRange = tokens[j];
var endRange = tokens[j + 1];
var code = tokens[j + 2];
while (startRange < endRange) {
var mapping = map[startRange] || {};
mapping.unicode = code++;
map[startRange] = mapping;
++startRange;
}
}
break;
case 'endcidchar':
case 'endbfchar':
for (var j = 0; j < tokens.length; j += 2) {
var index = tokens[j];
var code = tokens[j + 1];
var mapping = map[index] || {};
mapping.unicode = code;
map[index] = mapping;
}
break;
case '':
break;
default:
if (token[0] >= '0' && token[0] <= '9')
token = parseInt(token, 10); // a number
tokens.push(token);
token = '';
}
switch (byte) {
case 0x5B:
// begin list parsing
tokens.push(beginArrayToken);
break;
case 0x5D:
// collect array items
var items = [], item;
while (tokens.length &&
(item = tokens.pop()) != beginArrayToken)
items.unshift(item);
tokens.push(items);
break;
}
} else if (byte == 0x3E) {
if (token.length) {
// parsing hex number
tokens.push(parseInt(token, 16));
token = '';
}
} else {
token += String.fromCharCode(byte);
}
}
}
}
return glyphs;
},
getBaseFontMetricsAndMap: function getBaseFontMetricsAndMap(name) {
var map = {};
if (/^Symbol(-?(Bold|Italic))*$/.test(name)) {
// special case for symbols
var encoding = Encodings.symbolsEncoding.slice();
for (var i = 0, n = encoding.length, j; i < n; i++) {
if (!(j = encoding[i]))
continue;
map[i] = GlyphsUnicode[j] || 0;
}
}
var defaultWidth = 0;
var widths = Metrics[stdFontMap[name] || name];
if (isNum(widths)) {
defaultWidth = widths;
widths = null;
}
return {
defaultWidth: defaultWidth,
widths: widths || [],
map: map
};
},
translateFont: function partialEvaluatorTranslateFont(dict, xref, resources,
queue, handler, uniquePrefix, dependency) {
var baseDict = dict;
var type = dict.get('Subtype');
assertWellFormed(isName(type), 'invalid font Subtype');
var composite = false;
if (type.name == 'Type0') {
// If font is a composite
// - get the descendant font
// - set the type according to the descendant font
// - get the FontDescriptor from the descendant font
var df = dict.get('DescendantFonts');
if (!df)
return null;
if (isRef(df))
df = xref.fetch(df);
dict = xref.fetchIfRef(isRef(df) ? df : df[0]);
type = dict.get('Subtype');
assertWellFormed(isName(type), 'invalid font Subtype');
composite = true;
}
var descriptor = xref.fetchIfRef(dict.get('FontDescriptor'));
if (!descriptor) {
if (type.name == 'Type3') {
// FontDescriptor is only required for Type3 fonts when the document
// is a tagged pdf. Create a barbebones one to get by.
descriptor = new Dict();
descriptor.set('FontName', new Name(type.name));
} else {
// Before PDF 1.5 if the font was one of the base 14 fonts, having a
// FontDescriptor was not required.
// This case is here for compatibility.
var baseFontName = dict.get('BaseFont');
if (!isName(baseFontName))
return null;
// Using base font name as a font name.
baseFontName = baseFontName.name.replace(/[,_]/g, '-');
var metricsAndMap = this.getBaseFontMetricsAndMap(baseFontName);
var properties = {
type: type.name,
encoding: metricsAndMap.map,
differences: [],
widths: metricsAndMap.widths,
defaultWidth: metricsAndMap.defaultWidth,
firstChar: 0,
lastChar: 256
};
this.extractEncoding(dict, xref, properties);
return {
name: baseFontName,
dict: baseDict,
properties: properties
};
}
}
// According to the spec if 'FontDescriptor' is declared, 'FirstChar',
// 'LastChar' and 'Widths' should exists too, but some PDF encoders seems
// to ignore this rule when a variant of a standart font is used.
// TODO Fill the width array depending on which of the base font this is
// a variant.
var firstChar = xref.fetchIfRef(dict.get('FirstChar')) || 0;
var lastChar = xref.fetchIfRef(dict.get('LastChar')) || 256;
var defaultWidth = 0;
var glyphWidths = {};
var encoding = {};
var widths = xref.fetchIfRef(dict.get('Widths'));
if (widths) {
for (var i = 0, j = firstChar; i < widths.length; i++, j++)
glyphWidths[j] = widths[i];
defaultWidth = parseFloat(descriptor.get('MissingWidth')) || 0;
} else {
// Trying get the BaseFont metrics (see comment above).
var baseFontName = dict.get('BaseFont');
if (isName(baseFontName)) {
var metricsAndMap = this.getBaseFontMetricsAndMap(baseFontName.name);
glyphWidths = metricsAndMap.widths;
defaultWidth = metricsAndMap.defaultWidth;
encoding = metricsAndMap.map;
}
}
var fontName = xref.fetchIfRef(descriptor.get('FontName'));
assertWellFormed(isName(fontName), 'invalid font name');
var fontFile = descriptor.get('FontFile', 'FontFile2', 'FontFile3');
if (fontFile) {
fontFile = xref.fetchIfRef(fontFile);
if (fontFile.dict) {
var subtype = fontFile.dict.get('Subtype');
if (subtype)
subtype = subtype.name;
var length1 = fontFile.dict.get('Length1');
if (!isInt(length1))
length1 = xref.fetchIfRef(length1);
var length2 = fontFile.dict.get('Length2');
if (!isInt(length2))
length2 = xref.fetchIfRef(length2);
}
}
var properties = {
type: type.name,
subtype: subtype,
file: fontFile,
length1: length1,
length2: length2,
composite: composite,
fixedPitch: false,
fontMatrix: dict.get('FontMatrix') || IDENTITY_MATRIX,
firstChar: firstChar || 0,
lastChar: lastChar || 256,
bbox: descriptor.get('FontBBox'),
ascent: descriptor.get('Ascent'),
descent: descriptor.get('Descent'),
xHeight: descriptor.get('XHeight'),
capHeight: descriptor.get('CapHeight'),
defaultWidth: defaultWidth,
flags: descriptor.get('Flags'),
italicAngle: descriptor.get('ItalicAngle'),
differences: [],
widths: glyphWidths,
encoding: encoding,
coded: false
};
properties.glyphs = this.extractEncoding(dict, xref, properties);
if (type.name === 'Type3') {
properties.coded = true;
var charProcs = xref.fetchIfRef(dict.get('CharProcs'));
var fontResources = xref.fetchIfRef(dict.get('Resources')) || resources;
properties.resources = fontResources;
for (var key in charProcs.map) {
var glyphStream = xref.fetchIfRef(charProcs.map[key]);
var queue = {};
properties.glyphs[key].IRQueue = this.getIRQueue(glyphStream,
fontResources, queue, dependency);
}
}
return {
name: fontName.name,
dict: baseDict,
file: fontFile,
properties: properties
};
}
};
return constructor;
})();
var EvalState = (function evalState() {
function constructor() {
// Are soft masks and alpha values shapes or opacities?
this.alphaIsShape = false;
this.fontSize = 0;
this.textMatrix = IDENTITY_MATRIX;
this.leading = 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;
// Color spaces
this.fillColorSpace = null;
this.strokeColorSpace = null;
}
constructor.prototype = {
};
return constructor;
})();

265
fonts.js → src/fonts.js
Unescape View File

@ -20,6 +20,271 @@ var kPDFGlyphSpaceUnits = 1000;
// Until hinting is fully supported this constant can be used // Until hinting is fully supported this constant can be used
var kHintingEnabled = false; var kHintingEnabled = false;
var Encodings = {
get ExpertEncoding() {
return shadow(this, 'ExpertEncoding', ['', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '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'
]);
},
get MacExpertEncoding() {
return shadow(this, 'MacExpertEncoding', ['', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', 'space', 'exclamsmall', 'Hungarumlautsmall',
'centoldstyle', 'dollaroldstyle', 'dollarsuperior', 'ampersandsmall',
'Acutesmall', 'parenleftsuperior', 'parenrightsuperior',
'twodotenleader', 'onedotenleader', 'comma', 'hyphen', 'period',
'fraction', 'zerooldstyle', 'oneoldstyle', 'twooldstyle',
'threeoldstyle', 'fouroldstyle', 'fiveoldstyle', 'sixoldstyle',
'sevenoldstyle', 'eightoldstyle', 'nineoldstyle', 'colon', 'semicolon',
'', 'threequartersemdash', '', 'questionsmall', '', '', '', '',
'Ethsmall', '', '', 'onequarter', 'onehalf', 'threequarters',
'oneeighth', 'threeeighths', 'fiveeighths', 'seveneighths', 'onethird',
'twothirds', '', '', '', '', '', '', 'ff', 'fi', 'fl', 'ffi', 'ffl',
'parenleftinferior', '', 'parenrightinferior', 'Circumflexsmall',
'hypheninferior', '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', '', '',
'asuperior', 'centsuperior', '', '', '', '', 'Aacutesmall',
'Agravesmall', 'Acircumflexsmall', 'Adieresissmall', 'Atildesmall',
'Aringsmall', 'Ccedillasmall', 'Eacutesmall', 'Egravesmall',
'Ecircumflexsmall', 'Edieresissmall', 'Iacutesmall', 'Igravesmall',
'Icircumflexsmall', 'Idieresissmall', 'Ntildesmall', 'Oacutesmall',
'Ogravesmall', 'Ocircumflexsmall', 'Odieresissmall', 'Otildesmall',
'Uacutesmall', 'Ugravesmall', 'Ucircumflexsmall', 'Udieresissmall', '',
'eightsuperior', 'fourinferior', 'threeinferior', 'sixinferior',
'eightinferior', 'seveninferior', 'Scaronsmall', '', 'centinferior',
'twoinferior', '', 'Dieresissmall', '', 'Caronsmall', 'osuperior',
'fiveinferior', '', 'commainferior', 'periodinferior', 'Yacutesmall', '',
'dollarinferior', '', 'Thornsmall', '', 'nineinferior', 'zeroinferior',
'Zcaronsmall', 'AEsmall', 'Oslashsmall', 'questiondownsmall',
'oneinferior', 'Lslashsmall', '', '', '', '', '', '', 'Cedillasmall', '',
'', '', '', '', 'OEsmall', 'figuredash', 'hyphensuperior', '', '', '',
'', 'exclamdownsmall', '', 'Ydieresissmall', '', 'onesuperior',
'twosuperior', 'threesuperior', 'foursuperior', 'fivesuperior',
'sixsuperior', 'sevensuperior', 'ninesuperior', 'zerosuperior', '',
'esuperior', 'rsuperior', 'tsuperior', '', '', 'isuperior', 'ssuperior',
'dsuperior', '', '', '', '', '', 'lsuperior', 'Ogoneksmall',
'Brevesmall', 'Macronsmall', 'bsuperior', 'nsuperior', 'msuperior',
'commasuperior', 'periodsuperior', 'Dotaccentsmall', 'Ringsmall'
]);
},
get MacRomanEncoding() {
return shadow(this, 'MacRomanEncoding', ['', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', 'space', 'exclam', 'quotedbl', 'numbersign',
'dollar', 'percent', 'ampersand', 'quotesingle', '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',
'grave', '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', '', 'Adieresis', 'Aring',
'Ccedilla', 'Eacute', 'Ntilde', 'Odieresis', 'Udieresis', 'aacute',
'agrave', 'acircumflex', 'adieresis', 'atilde', 'aring', 'ccedilla',
'eacute', 'egrave', 'ecircumflex', 'edieresis', 'iacute', 'igrave',
'icircumflex', 'idieresis', 'ntilde', 'oacute', 'ograve', 'ocircumflex',
'odieresis', 'otilde', 'uacute', 'ugrave', 'ucircumflex', 'udieresis',
'dagger', 'degree', 'cent', 'sterling', 'section', 'bullet', 'paragraph',
'germandbls', 'registered', 'copyright', 'trademark', 'acute',
'dieresis', 'notequal', 'AE', 'Oslash', 'infinity', 'plusminus',
'lessequal', 'greaterequal', 'yen', 'mu', 'partialdiff', 'summation',
'product', 'pi', 'integral', 'ordfeminine', 'ordmasculine', 'Omega',
'ae', 'oslash', 'questiondown', 'exclamdown', 'logicalnot', 'radical',
'florin', 'approxequal', 'Delta', 'guillemotleft', 'guillemotright',
'ellipsis', 'space', 'Agrave', 'Atilde', 'Otilde', 'OE', 'oe', 'endash',
'emdash', 'quotedblleft', 'quotedblright', 'quoteleft', 'quoteright',
'divide', 'lozenge', 'ydieresis', 'Ydieresis', 'fraction', 'currency',
'guilsinglleft', 'guilsinglright', 'fi', 'fl', 'daggerdbl',
'periodcentered', 'quotesinglbase', 'quotedblbase', 'perthousand',
'Acircumflex', 'Ecircumflex', 'Aacute', 'Edieresis', 'Egrave', 'Iacute',
'Icircumflex', 'Idieresis', 'Igrave', 'Oacute', 'Ocircumflex', 'apple',
'Ograve', 'Uacute', 'Ucircumflex', 'Ugrave', 'dotlessi', 'circumflex',
'tilde', 'macron', 'breve', 'dotaccent', 'ring', 'cedilla',
'hungarumlaut', 'ogonek', 'caron'
]);
},
get StandardEncoding() {
return shadow(this, 'StandardEncoding', ['', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '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'
]);
},
get WinAnsiEncoding() {
return shadow(this, 'WinAnsiEncoding', ['', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', 'space', 'exclam', 'quotedbl', 'numbersign',
'dollar', 'percent', 'ampersand', 'quotesingle', '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',
'grave', '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', 'bullet', 'Euro',
'bullet', 'quotesinglbase', 'florin', 'quotedblbase', 'ellipsis',
'dagger', 'daggerdbl', 'circumflex', 'perthousand', 'Scaron',
'guilsinglleft', 'OE', 'bullet', 'Zcaron', 'bullet', 'bullet',
'quoteleft', 'quoteright', 'quotedblleft', 'quotedblright', 'bullet',
'endash', 'emdash', 'tilde', 'trademark', 'scaron', 'guilsinglright',
'oe', 'bullet', 'zcaron', 'Ydieresis', 'space', 'exclamdown', 'cent',
'sterling', 'currency', 'yen', 'brokenbar', 'section', 'dieresis',
'copyright', 'ordfeminine', 'guillemotleft', 'logicalnot', 'hyphen',
'registered', 'macron', 'degree', 'plusminus', 'twosuperior',
'threesuperior', 'acute', 'mu', 'paragraph', 'periodcentered',
'cedilla', 'onesuperior', 'ordmasculine', 'guillemotright', 'onequarter',
'onehalf', 'threequarters', 'questiondown', 'Agrave', 'Aacute',
'Acircumflex', 'Atilde', 'Adieresis', 'Aring', 'AE', 'Ccedilla',
'Egrave', 'Eacute', 'Ecircumflex', 'Edieresis', 'Igrave', 'Iacute',
'Icircumflex', 'Idieresis', 'Eth', 'Ntilde', 'Ograve', 'Oacute',
'Ocircumflex', 'Otilde', 'Odieresis', 'multiply', 'Oslash', 'Ugrave',
'Uacute', 'Ucircumflex', 'Udieresis', 'Yacute', 'Thorn', 'germandbls',
'agrave', 'aacute', 'acircumflex', 'atilde', 'adieresis', 'aring', 'ae',
'ccedilla', 'egrave', 'eacute', 'ecircumflex', 'edieresis', 'igrave',
'iacute', 'icircumflex', 'idieresis', 'eth', 'ntilde', 'ograve',
'oacute', 'ocircumflex', 'otilde', 'odieresis', 'divide', 'oslash',
'ugrave', 'uacute', 'ucircumflex', 'udieresis', 'yacute', 'thorn',
'ydieresis'
]);
},
get symbolsEncoding() {
return shadow(this, 'symbolsEncoding', ['', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', 'space', 'exclam', 'universal', 'numbersign',
'existential', 'percent', 'ampersand', 'suchthat', 'parenleft',
'parenright', 'asteriskmath', 'plus', 'comma', 'minus', 'period',
'slash', 'zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven',
'eight', 'nine', 'colon', 'semicolon', 'less', 'equal', 'greater',
'question', 'congruent', 'Alpha', 'Beta', 'Chi', 'Delta', 'Epsilon',
'Phi', 'Gamma', 'Eta', 'Iota', 'theta1', 'Kappa', 'Lambda', 'Mu', 'Nu',
'Omicron', 'Pi', 'Theta', 'Rho', 'Sigma', 'Tau', 'Upsilon', 'sigma1',
'Omega', 'Xi', 'Psi', 'Zeta', 'bracketleft', 'therefore', 'bracketright',
'perpendicular', 'underscore', 'radicalex', 'alpha', 'beta', 'chi',
'delta', 'epsilon', 'phi', 'gamma', 'eta', 'iota', 'phi1', 'kappa',
'lambda', 'mu', 'nu', 'omicron', 'pi', 'theta', 'rho', 'sigma', 'tau',
'upsilon', 'omega1', 'omega', 'xi', 'psi', 'zeta', 'braceleft', 'bar',
'braceright', 'similar', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', 'Euro', 'Upsilon1', 'minute', 'lessequal', 'fraction',
'infinity', 'florin', 'club', 'diamond', 'heart', 'spade', 'arrowboth',
'arrowleft', 'arrowup', 'arrowright', 'arrowdown', 'degree', 'plusminus',
'second', 'greaterequal', 'multiply', 'proportional', 'partialdiff',
'bullet', 'divide', 'notequal', 'equivalence', 'approxequal', 'ellipsis',
'arrowvertex', 'arrowhorizex', 'carriagereturn', 'aleph', 'Ifraktur',
'Rfraktur', 'weierstrass', 'circlemultiply', 'circleplus', 'emptyset',
'intersection', 'union', 'propersuperset', 'reflexsuperset', 'notsubset',
'propersubset', 'reflexsubset', 'element', 'notelement', 'angle',
'gradient', 'registerserif', 'copyrightserif', 'trademarkserif',
'product', 'radical', 'dotmath', 'logicalnot', 'logicaland', 'logicalor',
'arrowdblboth', 'arrowdblleft', 'arrowdblup', 'arrowdblright',
'arrowdbldown', 'lozenge', 'angleleft', 'registersans', 'copyrightsans',
'trademarksans', 'summation', 'parenlefttp', 'parenleftex',
'parenleftbt', 'bracketlefttp', 'bracketleftex', 'bracketleftbt',
'bracelefttp', 'braceleftmid', 'braceleftbt', 'braceex', '',
'angleright', 'integral', 'integraltp', 'integralex', 'integralbt',
'parenrighttp', 'parenrightex', 'parenrightbt', 'bracketrighttp',
'bracketrightex', 'bracketrightbt', 'bracerighttp', 'bracerightmid',
'bracerightbt'
]);
},
get zapfDingbatsEncoding() {
return shadow(this, 'zapfDingbatsEncoding', ['', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', 'space', 'a1', 'a2', 'a202', 'a3', 'a4',
'a5', 'a119', 'a118', 'a117', 'a11', 'a12', 'a13', 'a14', 'a15', 'a16',
'a105', 'a17', 'a18', 'a19', 'a20', 'a21', 'a22', 'a23', 'a24', 'a25',
'a26', 'a27', 'a28', 'a6', 'a7', 'a8', 'a9', 'a10', 'a29', 'a30', 'a31',
'a32', 'a33', 'a34', 'a35', 'a36', 'a37', 'a38', 'a39', 'a40', 'a41',
'a42', 'a43', 'a44', 'a45', 'a46', 'a47', 'a48', 'a49', 'a50', 'a51',
'a52', 'a53', 'a54', 'a55', 'a56', 'a57', 'a58', 'a59', 'a60', 'a61',
'a62', 'a63', 'a64', 'a65', 'a66', 'a67', 'a68', 'a69', 'a70', 'a71',
'a72', 'a73', 'a74', 'a203', 'a75', 'a204', 'a76', 'a77', 'a78', 'a79',
'a81', 'a82', 'a83', 'a84', 'a97', 'a98', 'a99', 'a100', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '', '',
'', '', '', '', '', '', '', '', '', '', '', '', 'a101', 'a102', 'a103',
'a104', 'a106', 'a107', 'a108', 'a112', 'a111', 'a110', 'a109', 'a120',
'a121', 'a122', 'a123', 'a124', 'a125', 'a126', 'a127', 'a128', 'a129',
'a130', 'a131', 'a132', 'a133', 'a134', 'a135', 'a136', 'a137', 'a138',
'a139', 'a140', 'a141', 'a142', 'a143', 'a144', 'a145', 'a146', 'a147',
'a148', 'a149', 'a150', 'a151', 'a152', 'a153', 'a154', 'a155', 'a156',
'a157', 'a158', 'a159', 'a160', 'a161', 'a163', 'a164', 'a196', 'a165',
'a192', 'a166', 'a167', 'a168', 'a169', 'a170', 'a171', 'a172', 'a173',
'a162', 'a174', 'a175', 'a176', 'a177', 'a178', 'a179', 'a193', 'a180',
'a199', 'a181', 'a200', 'a182', '', 'a201', 'a183', 'a184', 'a197',
'a185', 'a194', 'a198', 'a186', 'a195', 'a187', 'a188', 'a189', 'a190',
'a191'
]);
}
};
/** /**
* Hold a map of decoded fonts and of the standard fourteen Type1 * Hold a map of decoded fonts and of the standard fourteen Type1
* fonts and their acronyms. * fonts and their acronyms.

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src/function.js
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var PDFFunction = (function() {
var CONSTRUCT_SAMPLED = 0;
var CONSTRUCT_INTERPOLATED = 2;
var CONSTRUCT_STICHED = 3;
var CONSTRUCT_POSTSCRIPT = 4;
return {
getSampleArray: function(size, outputSize, bps, str) {
var length = 1;
for (var i = 0; i < size.length; i++)
length *= size[i];
length *= outputSize;
var array = [];
var codeSize = 0;
var codeBuf = 0;
var strBytes = str.getBytes((length * bps + 7) / 8);
var strIdx = 0;
for (var i = 0; i < length; i++) {
while (codeSize < bps) {
codeBuf <<= 8;
codeBuf |= strBytes[strIdx++];
codeSize += 8;
}
codeSize -= bps;
array.push(codeBuf >> codeSize);
codeBuf &= (1 << codeSize) - 1;
}
return array;
},
getIR: function(xref, fn) {
var dict = fn.dict;
if (!dict)
dict = fn;
var types = [this.constructSampled,
null,
this.constructInterpolated,
this.constructStiched,
this.constructPostScript];
var typeNum = dict.get('FunctionType');
var typeFn = types[typeNum];
if (!typeFn)
error('Unknown type of function');
return typeFn.call(this, fn, dict, xref);
},
fromIR: function(IR) {
var type = IR[0];
switch (type) {
case CONSTRUCT_SAMPLED:
return this.constructSampledFromIR(IR);
case CONSTRUCT_INTERPOLATED:
return this.constructInterpolatedFromIR(IR);
case CONSTRUCT_STICHED:
return this.constructStichedFromIR(IR);
case CONSTRUCT_POSTSCRIPT:
return this.constructPostScriptFromIR(IR);
}
},
parse: function(xref, fn) {
var IR = this.getIR(xref, fn);
return this.fromIR(IR);
},
constructSampled: function(str, dict) {
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain || !range)
error('No domain or range');
var inputSize = domain.length / 2;
var outputSize = range.length / 2;
if (inputSize != 1)
error('No support for multi-variable inputs to functions: ' +
inputSize);
var size = dict.get('Size');
var bps = dict.get('BitsPerSample');
var order = dict.get('Order');
if (!order)
order = 1;
if (order !== 1)
error('No support for cubic spline interpolation: ' + order);
var encode = dict.get('Encode');
if (!encode) {
encode = [];
for (var i = 0; i < inputSize; ++i) {
encode.push(0);
encode.push(size[i] - 1);
}
}
var decode = dict.get('Decode');
if (!decode)
decode = range;
var samples = this.getSampleArray(size, outputSize, bps, str);
return [
CONSTRUCT_SAMPLED, inputSize, domain, encode, decode, samples, size,
outputSize, bps, range
];
},
constructSampledFromIR: function(IR) {
var inputSize = IR[1];
var domain = IR[2];
var encode = IR[3];
var decode = IR[4];
var samples = IR[5];
var size = IR[6];
var outputSize = IR[7];
var bps = IR[8];
var range = IR[9];
return function(args) {
var clip = function(v, min, max) {
if (v > max)
v = max;
else if (v < min)
v = min;
return v;
};
if (inputSize != args.length)
error('Incorrect number of arguments: ' + inputSize + ' != ' +
args.length);
for (var i = 0; i < inputSize; i++) {
var i2 = i * 2;
// clip to the domain
var v = clip(args[i], domain[i2], domain[i2 + 1]);
// encode
v = encode[i2] + ((v - domain[i2]) *
(encode[i2 + 1] - encode[i2]) /
(domain[i2 + 1] - domain[i2]));
// clip to the size
args[i] = clip(v, 0, size[i] - 1);
}
// interpolate to table
TODO('Multi-dimensional interpolation');
var floor = Math.floor(args[0]);
var ceil = Math.ceil(args[0]);
var scale = args[0] - floor;
floor *= outputSize;
ceil *= outputSize;
var output = [], v = 0;
for (var i = 0; i < outputSize; ++i) {
if (ceil == floor) {
v = samples[ceil + i];
} else {
var low = samples[floor + i];
var high = samples[ceil + i];
v = low * scale + high * (1 - scale);
}
var i2 = i * 2;
// decode
v = decode[i2] + (v * (decode[i2 + 1] - decode[i2]) /
((1 << bps) - 1));
// clip to the domain
output.push(clip(v, range[i2], range[i2 + 1]));
}
return output;
}
},
constructInterpolated:
function pdfFunctionConstructInterpolated(str, dict) {
var c0 = dict.get('C0') || [0];
var c1 = dict.get('C1') || [1];
var n = dict.get('N');
if (!isArray(c0) || !isArray(c1))
error('Illegal dictionary for interpolated function');
var length = c0.length;
var diff = [];
for (var i = 0; i < length; ++i)
diff.push(c1[i] - c0[i]);
return [CONSTRUCT_INTERPOLATED, c0, diff, n];
},
constructInterpolatedFromIR:
function pdfFunctionconstructInterpolatedFromIR(IR) {
var c0 = IR[1];
var diff = IR[2];
var n = IR[3];
var length = diff.length;
return function(args) {
var x = n == 1 ? args[0] : Math.pow(args[0], n);
var out = [];
for (var j = 0; j < length; ++j)
out.push(c0[j] + (x * diff[j]));
return out;
}
},
constructStiched: function pdfFunctionConstructStiched(fn, dict, xref) {
var domain = dict.get('Domain');
var range = dict.get('Range');
if (!domain)
error('No domain');
var inputSize = domain.length / 2;
if (inputSize != 1)
error('Bad domain for stiched function');
var fnRefs = dict.get('Functions');
var fns = [];
for (var i = 0, ii = fnRefs.length; i < ii; ++i)
fns.push(PDFFunction.getIR(xref, xref.fetchIfRef(fnRefs[i])));
var bounds = dict.get('Bounds');
var encode = dict.get('Encode');
return [CONSTRUCT_STICHED, domain, bounds, encode, fns];
},
constructStichedFromIR: function pdfFunctionConstructStichedFromIR(IR) {
var domain = IR[1];
var bounds = IR[2];
var encode = IR[3];
var fnsIR = IR[4];
var fns = [];
for (var i = 0; i < fnsIR.length; i++) {
fns.push(PDFFunction.fromIR(fnsIR[i]));
}
return function(args) {
var clip = function(v, min, max) {
if (v > max)
v = max;
else if (v < min)
v = min;
return v;
};
// clip to domain
var v = clip(args[0], domain[0], domain[1]);
// calulate which bound the value is in
for (var i = 0, ii = bounds.length; i < ii; ++i) {
if (v < bounds[i])
break;
}
// encode value into domain of function
var dmin = domain[0];
if (i > 0)
dmin = bounds[i - 1];
var dmax = domain[1];
if (i < bounds.length)
dmax = bounds[i];
var rmin = encode[2 * i];
var rmax = encode[2 * i + 1];
var v2 = rmin + (v - dmin) * (rmax - rmin) / (dmax - dmin);
// call the appropropriate function
return fns[i]([v2]);
};
},
constructPostScript: function pdfFunctionConstructPostScript() {
return [CONSTRUCT_POSTSCRIPT];
},
constructPostScriptFromIR: function pdfFunctionConstructPostScriptFromIR() {
TODO('unhandled type of function');
return function() {
return [255, 105, 180];
};
}
};
})();

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var PDFImage = (function pdfImage() {
function constructor(xref, res, image, inline) {
this.image = image;
if (image.getParams) {
// JPX/JPEG2000 streams directly contain bits per component
// and color space mode information.
TODO('get params from actual stream');
// var bits = ...
// var colorspace = ...
}
// TODO cache rendered images?
var dict = image.dict;
this.width = dict.get('Width', 'W');
this.height = dict.get('Height', 'H');
if (this.width < 1 || this.height < 1)
error('Invalid image width: ' + this.width + ' or height: ' +
this.height);
this.interpolate = dict.get('Interpolate', 'I') || false;
this.imageMask = dict.get('ImageMask', 'IM') || false;
var bitsPerComponent = image.bitsPerComponent;
if (!bitsPerComponent) {
bitsPerComponent = dict.get('BitsPerComponent', 'BPC');
if (!bitsPerComponent) {
if (this.imageMask)
bitsPerComponent = 1;
else
error('Bits per component missing in image: ' + this.imageMask);
}
}
this.bpc = bitsPerComponent;
if (!this.imageMask) {
var colorSpace = dict.get('ColorSpace', 'CS');
if (!colorSpace) {
TODO('JPX images (which don"t require color spaces');
colorSpace = new Name('DeviceRGB');
}
this.colorSpace = ColorSpace.parse(colorSpace, xref, res);
this.numComps = this.colorSpace.numComps;
}
this.decode = dict.get('Decode', 'D');
var mask = xref.fetchIfRef(dict.get('Mask'));
var smask = xref.fetchIfRef(dict.get('SMask'));
if (mask) {
TODO('masked images');
} else if (smask) {
this.smask = new PDFImage(xref, res, smask);
}
}
constructor.prototype = {
getComponents: function getComponents(buffer, decodeMap) {
var bpc = this.bpc;
if (bpc == 8)
return buffer;
var width = this.width;
var height = this.height;
var numComps = this.numComps;
var length = width * height;
var bufferPos = 0;
var output = bpc <= 8 ? new Uint8Array(length) :
bpc <= 16 ? new Uint16Array(length) : new Uint32Array(length);
var rowComps = width * numComps;
if (bpc == 1) {
var valueZero = 0, valueOne = 1;
if (decodeMap) {
valueZero = decodeMap[0] ? 1 : 0;
valueOne = decodeMap[1] ? 1 : 0;
}
var mask = 0;
var buf = 0;
for (var i = 0, ii = length; i < ii; ++i) {
if (i % rowComps == 0) {
mask = 0;
buf = 0;
} else {
mask >>= 1;
}
if (mask <= 0) {
buf = buffer[bufferPos++];
mask = 128;
}
output[i] = !(buf & mask) ? valueZero : valueOne;
}
} else {
if (decodeMap != null)
TODO('interpolate component values');
var bits = 0, buf = 0;
for (var i = 0, ii = length; i < ii; ++i) {
if (i % rowComps == 0) {
buf = 0;
bits = 0;
}
while (bits < bpc) {
buf = (buf << 8) | buffer[bufferPos++];
bits += 8;
}
var remainingBits = bits - bpc;
output[i] = buf >> remainingBits;
buf = buf & ((1 << remainingBits) - 1);
bits = remainingBits;
}
}
return output;
},
getOpacity: function getOpacity() {
var smask = this.smask;
var width = this.width;
var height = this.height;
var buf = new Uint8Array(width * height);
if (smask) {
if (smask.image.getImage) {
// smask is a DOM image
var tempCanvas = new ScratchCanvas(width, height);
var tempCtx = tempCanvas.getContext('2d');
var domImage = smask.image.getImage();
tempCtx.drawImage(domImage, 0, 0, domImage.width, domImage.height,
0, 0, width, height);
var data = tempCtx.getImageData(0, 0, width, height).data;
for (var i = 0, j = 0, ii = width * height; i < ii; ++i, j += 4)
buf[i] = data[j]; // getting first component value
return buf;
}
var sw = smask.width;
var sh = smask.height;
if (sw != this.width || sh != this.height)
error('smask dimensions do not match image dimensions: ' + sw +
' != ' + this.width + ', ' + sh + ' != ' + this.height);
smask.fillGrayBuffer(buf);
return buf;
} else {
for (var i = 0, ii = width * height; i < ii; ++i)
buf[i] = 255;
}
return buf;
},
applyStencilMask: function applyStencilMask(buffer, inverseDecode) {
var width = this.width, height = this.height;
var bitStrideLength = (width + 7) >> 3;
this.image.reset();
var imgArray = this.image.getBytes(bitStrideLength * height);
var imgArrayPos = 0;
var i, j, mask, buf;
// removing making non-masked pixels transparent
var bufferPos = 3; // alpha component offset
for (i = 0; i < height; i++) {
mask = 0;
for (j = 0; j < width; j++) {
if (!mask) {
buf = imgArray[imgArrayPos++];
mask = 128;
}
if (!(buf & mask) == inverseDecode) {
buffer[bufferPos] = 0;
}
bufferPos += 4;
mask >>= 1;
}
}
},
fillRgbaBuffer: function fillRgbaBuffer(buffer, decodeMap) {
var numComps = this.numComps;
var width = this.width;
var height = this.height;
var bpc = this.bpc;
// rows start at byte boundary;
var rowBytes = (width * numComps * bpc + 7) >> 3;
this.image.reset();
var imgArray = this.image.getBytes(height * rowBytes);
var comps = this.colorSpace.getRgbBuffer(
this.getComponents(imgArray, decodeMap), bpc);
var compsPos = 0;
var opacity = this.getOpacity();
var opacityPos = 0;
var length = width * height * 4;
for (var i = 0; i < length; i += 4) {
buffer[i] = comps[compsPos++];
buffer[i + 1] = comps[compsPos++];
buffer[i + 2] = comps[compsPos++];
buffer[i + 3] = opacity[opacityPos++];
}
},
fillGrayBuffer: function fillGrayBuffer(buffer) {
var numComps = this.numComps;
if (numComps != 1)
error('Reading gray scale from a color image: ' + numComps);
var width = this.width;
var height = this.height;
var bpc = this.bpc;
// rows start at byte boundary;
var rowBytes = (width * numComps * bpc + 7) >> 3;
this.image.reset();
var imgArray = this.image.getBytes(height * rowBytes);
var comps = this.getComponents(imgArray);
var length = width * height;
for (var i = 0; i < length; ++i)
buffer[i] = comps[i];
}
};
return constructor;
})();
var JpegImage = (function() {
function JpegImage(objId, imageData, objs) {
var src = 'data:image/jpeg;base64,' + window.btoa(imageData);
var img = new Image();
img.onload = (function() {
this.loaded = true;
objs.resolve(objId, this);
if (this.onLoad)
this.onLoad();
}).bind(this);
img.src = src;
this.domImage = img;
}
JpegImage.prototype = {
getImage: function() {
return this.domImage;
}
};
return JpegImage;
})();

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var Name = (function nameName() {
function constructor(name) {
this.name = name;
}
constructor.prototype = {
};
return constructor;
})();
var Cmd = (function cmdCmd() {
function constructor(cmd) {
this.cmd = cmd;
}
constructor.prototype = {
};
return constructor;
})();
var Dict = (function dictDict() {
function constructor() {
this.map = Object.create(null);
}
constructor.prototype = {
get: function dictGet(key1, key2, key3) {
var value;
if (typeof (value = this.map[key1]) != 'undefined' || key1 in this.map ||
typeof key2 == 'undefined') {
return value;
}
if (typeof (value = this.map[key2]) != 'undefined' || key2 in this.map ||
typeof key3 == 'undefined') {
return value;
}
return this.map[key3] || null;
},
set: function dictSet(key, value) {
this.map[key] = value;
},
has: function dictHas(key) {
return key in this.map;
},
forEach: function dictForEach(callback) {
for (var key in this.map) {
callback(key, this.map[key]);
}
}
};
return constructor;
})();
var Ref = (function refRef() {
function constructor(num, gen) {
this.num = num;
this.gen = gen;
}
constructor.prototype = {
};
return constructor;
})();
// The reference is identified by number and generation,
// this structure stores only one instance of the reference.
var RefSet = (function refSet() {
function constructor() {
this.dict = {};
}
constructor.prototype = {
has: function refSetHas(ref) {
return !!this.dict['R' + ref.num + '.' + ref.gen];
},
put: function refSetPut(ref) {
this.dict['R' + ref.num + '.' + ref.gen] = ref;
}
};
return constructor;
})();
var Catalog = (function catalogCatalog() {
function constructor(xref) {
this.xref = xref;
var obj = xref.getCatalogObj();
assertWellFormed(isDict(obj), 'catalog object is not a dictionary');
this.catDict = obj;
}
constructor.prototype = {
get toplevelPagesDict() {
var pagesObj = this.catDict.get('Pages');
assertWellFormed(isRef(pagesObj), 'invalid top-level pages reference');
var xrefObj = this.xref.fetch(pagesObj);
assertWellFormed(isDict(xrefObj), 'invalid top-level pages dictionary');
// shadow the prototype getter
return shadow(this, 'toplevelPagesDict', xrefObj);
},
get documentOutline() {
var obj = this.catDict.get('Outlines');
var xref = this.xref;
var root = { items: [] };
if (isRef(obj)) {
obj = xref.fetch(obj).get('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.fetch(i.obj);
if (!outlineDict.has('Title'))
error('Invalid outline item');
var dest = outlineDict.get('A');
if (dest)
dest = xref.fetchIfRef(dest).get('D');
else if (outlineDict.has('Dest')) {
dest = outlineDict.get('Dest');
if (isName(dest))
dest = dest.name;
}
var title = xref.fetchIfRef(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.get('First');
if (isRef(obj) && !processed.has(obj)) {
queue.push({obj: obj, parent: outlineItem});
processed.put(obj);
}
obj = outlineDict.get('Next');
if (isRef(obj) && !processed.has(obj)) {
queue.push({obj: obj, parent: i.parent});
processed.put(obj);
}
}
}
}
obj = root.items.length > 0 ? root.items : null;
return shadow(this, 'documentOutline', obj);
},
get numPages() {
var obj = this.toplevelPagesDict.get('Count');
assertWellFormed(
isInt(obj),
'page count in top level pages object is not an integer'
);
// shadow the prototype getter
return shadow(this, 'num', obj);
},
traverseKids: function catalogTraverseKids(pagesDict) {
var pageCache = this.pageCache;
var kids = pagesDict.get('Kids');
assertWellFormed(isArray(kids),
'page dictionary kids object is not an array');
for (var i = 0; i < kids.length; ++i) {
var kid = kids[i];
assertWellFormed(isRef(kid),
'page dictionary kid is not a reference');
var obj = this.xref.fetch(kid);
if (isDict(obj, 'Page') || (isDict(obj) && !obj.has('Kids'))) {
pageCache.push(new Page(this.xref, pageCache.length, obj, kid));
} else { // must be a child page dictionary
assertWellFormed(
isDict(obj),
'page dictionary kid reference points to wrong type of object'
);
this.traverseKids(obj);
}
}
},
get destinations() {
function fetchDestination(xref, ref) {
var dest = xref.fetchIfRef(ref);
return isDict(dest) ? dest.get('D') : dest;
}
var xref = this.xref;
var dests = {}, nameTreeRef, nameDictionaryRef;
var obj = this.catDict.get('Names');
if (obj)
nameTreeRef = xref.fetchIfRef(obj).get('Dests');
else if (this.catDict.has('Dests'))
nameDictionaryRef = this.catDict.get('Dests');
if (nameDictionaryRef) {
// reading simple destination dictionary
obj = xref.fetchIfRef(nameDictionaryRef);
obj.forEach(function catalogForEach(key, value) {
if (!value) return;
dests[key] = fetchDestination(xref, value);
});
}
if (nameTreeRef) {
// reading name tree
var processed = new RefSet();
processed.put(nameTreeRef);
var queue = [nameTreeRef];
while (queue.length > 0) {
var i, n;
obj = xref.fetch(queue.shift());
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');
for (i = 0, n = names.length; i < n; i += 2) {
dests[names[i]] = fetchDestination(xref, names[i + 1]);
}
}
}
return shadow(this, 'destinations', dests);
},
getPage: function catalogGetPage(n) {
var pageCache = this.pageCache;
if (!pageCache) {
pageCache = this.pageCache = [];
this.traverseKids(this.toplevelPagesDict);
}
return this.pageCache[n - 1];
}
};
return constructor;
})();
var XRef = (function xRefXRef() {
function constructor(stream, startXRef, mainXRefEntriesOffset) {
this.stream = stream;
this.entries = [];
this.xrefstms = {};
var trailerDict = this.readXRef(startXRef);
// prepare the XRef cache
this.cache = [];
var encrypt = trailerDict.get('Encrypt');
if (encrypt) {
var fileId = trailerDict.get('ID');
this.encrypt = new CipherTransformFactory(this.fetch(encrypt),
fileId[0] /*, password */);
}
// get the root dictionary (catalog) object
if (!isRef(this.root = trailerDict.get('Root')))
error('Invalid root reference');
}
constructor.prototype = {
readXRefTable: function readXRefTable(parser) {
var obj;
while (true) {
if (isCmd(obj = parser.getObj(), 'trailer'))
break;
if (!isInt(obj))
error('Invalid XRef table');
var first = obj;
if (!isInt(obj = parser.getObj()))
error('Invalid XRef table');
var n = obj;
if (first < 0 || n < 0 || (first + n) != ((first + n) | 0))
error('Invalid XRef table: ' + first + ', ' + n);
for (var i = first; i < first + n; ++i) {
var entry = {};
if (!isInt(obj = parser.getObj()))
error('Invalid XRef table: ' + first + ', ' + n);
entry.offset = obj;
if (!isInt(obj = parser.getObj()))
error('Invalid XRef table: ' + first + ', ' + n);
entry.gen = obj;
obj = parser.getObj();
if (isCmd(obj, 'n')) {
entry.uncompressed = true;
} else if (isCmd(obj, 'f')) {
entry.free = true;
} else {
error('Invalid XRef table: ' + first + ', ' + n);
}
if (!this.entries[i]) {
// In some buggy PDF files the xref table claims to start at 1
// instead of 0.
if (i == 1 && first == 1 &&
entry.offset == 0 && entry.gen == 65535 && entry.free) {
i = first = 0;
}
this.entries[i] = entry;
}
}
}
// read the trailer dictionary
var dict;
if (!isDict(dict = parser.getObj()))
error('Invalid XRef table');
// get the 'Prev' pointer
var prev;
obj = dict.get('Prev');
if (isInt(obj)) {
prev = obj;
} else if (isRef(obj)) {
// certain buggy PDF generators generate "/Prev NNN 0 R" instead
// of "/Prev NNN"
prev = obj.num;
}
if (prev) {
this.readXRef(prev);
}
// check for 'XRefStm' key
if (isInt(obj = dict.get('XRefStm'))) {
var pos = obj;
// ignore previously loaded xref streams (possible infinite recursion)
if (!(pos in this.xrefstms)) {
this.xrefstms[pos] = 1;
this.readXRef(pos);
}
}
return dict;
},
readXRefStream: function readXRefStream(stream) {
var streamParameters = stream.parameters;
var byteWidths = streamParameters.get('W');
var range = streamParameters.get('Index');
if (!range)
range = [0, streamParameters.get('Size')];
var i, j;
while (range.length > 0) {
var first = range[0], n = range[1];
if (!isInt(first) || !isInt(n))
error('Invalid XRef range fields: ' + first + ', ' + n);
var typeFieldWidth = byteWidths[0];
var offsetFieldWidth = byteWidths[1];
var generationFieldWidth = byteWidths[2];
if (!isInt(typeFieldWidth) || !isInt(offsetFieldWidth) ||
!isInt(generationFieldWidth)) {
error('Invalid XRef entry fields length: ' + first + ', ' + n);
}
for (i = 0; i < n; ++i) {
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 = 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;
}
range.splice(0, 2);
}
var prev = streamParameters.get('Prev');
if (isInt(prev))
this.readXRef(prev);
return streamParameters;
},
indexObjects: function indexObjects() {
// Simple scan through the PDF content to find objects,
// trailers and XRef streams.
function readToken(data, offset) {
var token = '', ch = data[offset];
while (ch !== 13 && ch !== 10) {
if (++offset >= data.length)
break;
token += String.fromCharCode(ch);
ch = data[offset];
}
return token;
}
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;
}
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]);
var stream = this.stream;
stream.pos = 0;
var buffer = stream.getBytes();
var position = stream.start, length = buffer.length;
var trailers = [], xrefStms = [];
var state = 0;
var currentToken;
while (position < length) {
var ch = buffer[position];
if (ch === 32 || ch === 9 || ch === 13 || ch === 10) {
++position;
continue;
}
if (ch === 37) { // %-comment
do {
++position;
ch = buffer[position];
} while (ch !== 13 && ch !== 10);
continue;
}
var token = readToken(buffer, position);
var m;
if (token === 'xref') {
position += skipUntil(buffer, position, trailerBytes);
trailers.push(position);
position += skipUntil(buffer, position, startxrefBytes);
} else if ((m = /^(\d+)\s+(\d+)\s+obj\b/.exec(token))) {
this.entries[m[1]] = {
offset: position,
gen: m[2] | 0,
uncompressed: true
};
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);
this.xrefstms[position] = 1; // don't read it recursively
}
position += contentLength;
} else
position += token.length + 1;
}
// reading XRef streams
for (var i = 0; i < xrefStms.length; ++i) {
this.readXRef(xrefStms[i]);
}
// finding main trailer
var dict;
for (var i = 0; i < trailers.length; ++i) {
stream.pos = trailers[i];
var parser = new Parser(new Lexer(stream), true);
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;
}
// no tailer with 'ID', taking last one (if exists)
if (dict)
return dict;
// nothing helps
error('Invalid PDF structure');
return null;
},
readXRef: function readXref(startXRef) {
var stream = this.stream;
stream.pos = startXRef;
var parser = new Parser(new Lexer(stream), true);
var obj = parser.getObj();
// parse an old-style xref table
if (isCmd(obj, 'xref'))
return this.readXRefTable(parser);
// parse an xref stream
if (isInt(obj)) {
if (!isInt(parser.getObj()) ||
!isCmd(parser.getObj(), 'obj') ||
!isStream(obj = parser.getObj())) {
error('Invalid XRef stream');
}
return this.readXRefStream(obj);
}
return this.indexObjects();
},
getEntry: function xRefGetEntry(i) {
var e = this.entries[i];
if (e.free)
error('reading an XRef stream not implemented yet');
return e;
},
fetchIfRef: function xRefFetchIfRef(obj) {
if (!isRef(obj))
return obj;
return this.fetch(obj);
},
fetch: function xRefFetch(ref, suppressEncryption) {
var num = ref.num;
var e = this.cache[num];
if (e)
return e;
e = this.getEntry(num);
var gen = ref.gen;
var stream, parser;
if (e.uncompressed) {
if (e.gen != gen)
throw ('inconsistent generation in XRef');
stream = this.stream.makeSubStream(e.offset);
parser = new Parser(new Lexer(stream), true, this);
var obj1 = parser.getObj();
var obj2 = parser.getObj();
var obj3 = parser.getObj();
if (!isInt(obj1) || obj1 != num ||
!isInt(obj2) || obj2 != 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) {
try {
e = parser.getObj(this.encrypt.createCipherTransform(num, gen));
} catch (ex) {
// almost all streams must be encrypted, but sometimes
// they are not probably due to some broken generators
// re-trying without encryption
return this.fetch(ref, true);
}
} else {
e = parser.getObj();
}
// Don't cache streams since they are mutable (except images).
if (!isStream(e) || e.getImage)
this.cache[num] = e;
return e;
}
// compressed entry
stream = this.fetch(new Ref(e.offset, 0));
if (!isStream(stream))
error('bad ObjStm stream');
var first = stream.parameters.get('First');
var n = stream.parameters.get('N');
if (!isInt(first) || !isInt(n)) {
error('invalid first and n parameters for ObjStm stream');
}
parser = new Parser(new Lexer(stream), false);
var i, entries = [], 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());
this.cache[nums[i]] = entries[i];
}
e = entries[e.gen];
if (!e) {
error('bad XRef entry for compressed object');
}
return e;
},
getCatalogObj: function xRefGetCatalogObj() {
return this.fetch(this.root);
}
};
return constructor;
})();
/**
* 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.
*/
var PDFObjects = (function() {
function PDFObjects() {
this.objs = {};
}
PDFObjects.prototype = {
objs: null,
/**
* Internal function.
* Ensures there is an object defined for `objId`. Stores `data` on the
* object *if* it is created.
*/
ensureObj: function(objId, data) {
if (this.objs[objId])
return this.objs[objId];
return this.objs[objId] = new Promise(objId, data);
},
/**
* 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(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).then(callback);
return;
}
// 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.isResolved)
throw 'Requesting object that isn\'t resolved yet ' + objId;
else
return obj.data;
},
/**
* Resolves the object `objId` with optional `data`.
*/
resolve: function(objId, data) {
var objs = this.objs;
// In case there is a promise already on this object, just resolve it.
if (objs[objId]) {
objs[objId].resolve(data);
} else {
this.ensureObj(objId, data);
}
},
onData: function(objId, callback) {
this.ensureObj(objId).onData(callback);
},
isResolved: function(objId) {
var objs = this.objs;
if (!objs[objId]) {
return false;
} else {
return objs[objId].isResolved;
}
},
hasData: function(objId) {
var objs = this.objs;
if (!objs[objId]) {
return false;
} else {
return objs[objId].hasData;
}
},
/**
* Sets the data of an object but *doesn't* resolve it.
*/
setData: function(objId, data) {
// Watchout! If you call `this.ensureObj(objId, data)` you're going to
// create a *resolved* promise which shouldn't be the case!
this.ensureObj(objId).data = data;
}
};
return PDFObjects;
})();

630
src/parser.js
Unescape View File

@ -0,0 +1,630 @@
var EOF = {};
function isEOF(v) {
return v == EOF;
}
var Parser = (function parserParser() {
function constructor(lexer, allowStreams, xref) {
this.lexer = lexer;
this.allowStreams = allowStreams;
this.xref = xref;
this.inlineImg = 0;
this.refill();
}
constructor.prototype = {
refill: function parserRefill() {
this.buf1 = this.lexer.getObj();
this.buf2 = this.lexer.getObj();
},
shift: function parserShift() {
if (isCmd(this.buf2, 'ID')) {
this.buf1 = this.buf2;
this.buf2 = null;
// skip byte after ID
this.lexer.skip();
} else {
this.buf1 = this.buf2;
this.buf2 = this.lexer.getObj();
}
},
getObj: function parserGetObj(cipherTransform) {
if (isCmd(this.buf1, 'BI')) { // inline image
this.shift();
return this.makeInlineImage(cipherTransform);
}
if (isCmd(this.buf1, '[')) { // array
this.shift();
var array = [];
while (!isCmd(this.buf1, ']') && !isEOF(this.buf1))
array.push(this.getObj());
if (isEOF(this.buf1))
error('End of file inside array');
this.shift();
return array;
}
if (isCmd(this.buf1, '<<')) { // dictionary or stream
this.shift();
var dict = new Dict();
while (!isCmd(this.buf1, '>>') && !isEOF(this.buf1)) {
if (!isName(this.buf1)) {
error('Dictionary key must be a name object');
} else {
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;
}
if (isInt(this.buf1)) { // indirect reference or integer
var num = this.buf1;
this.shift();
if (isInt(this.buf1) && isCmd(this.buf2, 'R')) {
var ref = new Ref(num, this.buf1);
this.shift();
this.shift();
return ref;
}
return num;
}
if (isString(this.buf1)) { // string
var str = this.buf1;
this.shift();
if (cipherTransform)
str = cipherTransform.decryptString(str);
return str;
}
// simple object
var obj = this.buf1;
this.shift();
return obj;
},
makeInlineImage: function parserMakeInlineImage(cipherTransform) {
var lexer = this.lexer;
var stream = lexer.stream;
// parse dictionary
var dict = new Dict();
while (!isCmd(this.buf1, 'ID') && !isEOF(this.buf1)) {
if (!isName(this.buf1)) {
error('Dictionary key must be a name object');
} else {
var key = this.buf1.name;
this.shift();
if (isEOF(this.buf1))
break;
dict.set(key, this.getObj(cipherTransform));
}
}
// parse image stream
var startPos = stream.pos;
// searching for the /\sEI\s/
var state = 0, ch;
while (state != 4 && (ch = stream.getByte()) != null) {
switch (ch) {
case 0x20:
case 0x0D:
case 0x0A:
state = state === 3 ? 4 : 1;
break;
case 0x45:
state = state === 1 ? 2 : 0;
break;
case 0x49:
state = state === 2 ? 3 : 0;
break;
default:
state = 0;
break;
}
}
// TODO improve the small images performance to remove the limit
var inlineImgLimit = 500;
if (++this.inlineImg >= inlineImgLimit) {
if (this.inlineImg === inlineImgLimit)
warn('Too many inline images');
this.shift();
return null;
}
var length = (stream.pos - 4) - startPos;
var imageStream = stream.makeSubStream(startPos, length, dict);
if (cipherTransform)
imageStream = cipherTransform.createStream(imageStream);
imageStream = this.filter(imageStream, dict, length);
imageStream.parameters = dict;
this.buf2 = new Cmd('EI');
this.shift();
return imageStream;
},
makeStream: function parserMakeStream(dict, cipherTransform) {
var lexer = this.lexer;
var stream = lexer.stream;
// get stream start position
lexer.skipToNextLine();
var pos = stream.pos;
// get length
var length = dict.get('Length');
var xref = this.xref;
if (xref)
length = xref.fetchIfRef(length);
if (!isInt(length)) {
error('Bad ' + length + ' attribute in stream');
length = 0;
}
// skip over the stream data
stream.pos = pos + length;
this.shift(); // '>>'
this.shift(); // 'stream'
if (!isCmd(this.buf1, 'endstream'))
error('Missing endstream');
this.shift();
stream = stream.makeSubStream(pos, length, dict);
if (cipherTransform)
stream = cipherTransform.createStream(stream);
stream = this.filter(stream, dict, length);
stream.parameters = dict;
return stream;
},
filter: function parserFilter(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);
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);
else {
params = null;
if (isArray(paramsArray) && (i in paramsArray))
params = paramsArray[i];
stream = this.makeFilter(stream, filter.name, length, params);
// after the first stream the length variable is invalid
length = null;
}
}
}
return stream;
},
makeFilter: function parserMakeFilter(stream, name, length, params) {
if (name == 'FlateDecode' || name == 'Fl') {
if (params) {
return new PredictorStream(new FlateStream(stream), params);
}
return new FlateStream(stream);
} else if (name == 'LZWDecode' || name == 'LZW') {
var earlyChange = 1;
if (params) {
if (params.has('EarlyChange'))
earlyChange = params.get('EarlyChange');
return new PredictorStream(
new LZWStream(stream, earlyChange), params);
}
return new LZWStream(stream, earlyChange);
} else if (name == 'DCTDecode' || name == 'DCT') {
var bytes = stream.getBytes(length);
return new JpegStream(bytes, stream.dict);
} else if (name == 'ASCII85Decode' || name == 'A85') {
return new Ascii85Stream(stream);
} else if (name == 'ASCIIHexDecode' || name == 'AHx') {
return new AsciiHexStream(stream);
} else if (name == 'CCITTFaxDecode' || name == 'CCF') {
return new CCITTFaxStream(stream, params);
} else {
error('filter "' + name + '" not supported yet');
}
return stream;
}
};
return constructor;
})();
var Lexer = (function lexer() {
function constructor(stream) {
this.stream = stream;
}
constructor.isSpace = function lexerIsSpace(ch) {
return ch == ' ' || ch == '\t' || ch == '\x0d' || ch == '\x0a';
};
// 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 >= '0' && ch <= '9')
return ch.charCodeAt(0) - 48;
ch = ch.toUpperCase();
if (ch >= 'A' && ch <= 'F')
return ch.charCodeAt(0) - 55;
return -1;
}
constructor.prototype = {
getNumber: function lexerGetNumber(ch) {
var floating = false;
var str = ch;
var stream = this.stream;
for (;;) {
ch = stream.lookChar();
if (ch == '.' && !floating) {
str += ch;
floating = true;
} else if (ch == '-') {
// ignore minus signs in the middle of numbers to match
// Adobe's behavior
warn('Badly formated number');
} else if (ch >= '0' && ch <= '9') {
str += ch;
} else if (ch == 'e' || ch == 'E') {
floating = true;
} else {
// the last character doesn't belong to us
break;
}
stream.skip();
}
var value = parseFloat(str);
if (isNaN(value))
error('Invalid floating point number: ' + value);
return value;
},
getString: function lexerGetString() {
var numParen = 1;
var done = false;
var str = '';
var stream = this.stream;
var ch;
do {
ch = stream.getChar();
switch (ch) {
case undefined:
warn('Unterminated string');
done = true;
break;
case '(':
++numParen;
str += ch;
break;
case ')':
if (--numParen == 0) {
done = true;
} else {
str += ch;
}
break;
case '\\':
ch = stream.getChar();
switch (ch) {
case undefined:
warn('Unterminated string');
done = true;
break;
case 'n':
str += '\n';
break;
case 'r':
str += '\r';
break;
case 't':
str += '\t';
break;
case 'b':
str += '\b';
break;
case 'f':
str += '\f';
break;
case '\\':
case '(':
case ')':
str += ch;
break;
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
var x = ch - '0';
ch = stream.lookChar();
if (ch >= '0' && ch <= '7') {
stream.skip();
x = (x << 3) + (ch - '0');
ch = stream.lookChar();
if (ch >= '0' && ch <= '7') {
stream.skip();
x = (x << 3) + (ch - '0');
}
}
str += String.fromCharCode(x);
break;
case '\r':
ch = stream.lookChar();
if (ch == '\n')
stream.skip();
break;
case '\n':
break;
default:
str += ch;
}
break;
default:
str += ch;
}
} while (!done);
return str;
},
getName: function lexerGetName(ch) {
var str = '';
var stream = this.stream;
while (!!(ch = stream.lookChar()) && !specialChars[ch.charCodeAt(0)]) {
stream.skip();
if (ch == '#') {
ch = stream.lookChar();
var x = toHexDigit(ch);
if (x != -1) {
stream.skip();
var x2 = toHexDigit(stream.getChar());
if (x2 == -1)
error('Illegal digit in hex char in name: ' + x2);
str += String.fromCharCode((x << 4) | x2);
} else {
str += '#';
str += ch;
}
} else {
str += ch;
}
}
if (str.length > 128)
error('Warning: name token is longer than allowed by the spec: ' +
str.length);
return new Name(str);
},
getHexString: function lexerGetHexString(ch) {
var str = '';
var stream = this.stream;
for (;;) {
ch = stream.getChar();
if (ch == '>') {
break;
}
if (!ch) {
warn('Unterminated hex string');
break;
}
if (specialChars[ch.charCodeAt(0)] != 1) {
var x, x2;
if ((x = toHexDigit(ch)) == -1)
error('Illegal character in hex string: ' + ch);
ch = stream.getChar();
while (specialChars[ch.charCodeAt(0)] == 1)
ch = stream.getChar();
if ((x2 = toHexDigit(ch)) == -1)
error('Illegal character in hex string: ' + ch);
str += String.fromCharCode((x << 4) | x2);
}
}
return str;
},
getObj: function lexerGetObj() {
// skip whitespace and comments
var comment = false;
var stream = this.stream;
var ch;
while (true) {
if (!(ch = stream.getChar()))
return EOF;
if (comment) {
if (ch == '\r' || ch == '\n')
comment = false;
} else if (ch == '%') {
comment = true;
} else if (specialChars[ch.charCodeAt(0)] != 1) {
break;
}
}
// start reading token
switch (ch) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case '+': case '-': case '.':
return this.getNumber(ch);
case '(':
return this.getString();
case '/':
return this.getName(ch);
// array punctuation
case '[':
case ']':
return new Cmd(ch);
// hex string or dict punctuation
case '<':
ch = stream.lookChar();
if (ch == '<') {
// dict punctuation
stream.skip();
return new Cmd('<<');
}
return this.getHexString(ch);
// dict punctuation
case '>':
ch = stream.lookChar();
if (ch == '>') {
stream.skip();
return new Cmd('>>');
}
case '{':
case '}':
return new Cmd(ch);
// fall through
case ')':
error('Illegal character: ' + ch);
return Error;
}
// command
var str = ch;
while (!!(ch = stream.lookChar()) && !specialChars[ch.charCodeAt(0)]) {
stream.skip();
if (str.length == 128) {
error('Command token too long: ' + str.length);
break;
}
str += ch;
}
if (str == 'true')
return true;
if (str == 'false')
return false;
if (str == 'null')
return null;
return new Cmd(str);
},
skipToNextLine: function lexerSkipToNextLine() {
var stream = this.stream;
while (true) {
var ch = stream.getChar();
if (!ch || ch == '\n')
return;
if (ch == '\r') {
if ((ch = stream.lookChar()) == '\n')
stream.skip();
return;
}
}
},
skip: function lexerSkip() {
this.stream.skip();
}
};
return constructor;
})();
var Linearization = (function linearizationLinearization() {
function constructor(stream) {
this.parser = new Parser(new Lexer(stream), false);
var obj1 = this.parser.getObj();
var obj2 = this.parser.getObj();
var obj3 = this.parser.getObj();
this.linDict = this.parser.getObj();
if (isInt(obj1) && isInt(obj2) && isCmd(obj3, 'obj') &&
isDict(this.linDict)) {
var obj = this.linDict.get('Linearized');
if (!(isNum(obj) && obj > 0))
this.linDict = null;
}
}
constructor.prototype = {
getInt: function linearizationGetInt(name) {
var linDict = this.linDict;
var obj;
if (isDict(linDict) &&
isInt(obj = linDict.get(name)) &&
obj > 0) {
return obj;
}
error('"' + name + '" field in linearization table is invalid');
return 0;
},
getHint: function linearizationGetHint(index) {
var linDict = this.linDict;
var obj1, obj2;
if (isDict(linDict) &&
isArray(obj1 = linDict.get('H')) &&
obj1.length >= 2 &&
isInt(obj2 = obj1[index]) &&
obj2 > 0) {
return obj2;
}
error('Hints table in linearization table is invalid: ' + index);
return 0;
},
get length() {
if (!isDict(this.linDict))
return 0;
return this.getInt('L');
},
get hintsOffset() {
return this.getHint(0);
},
get hintsLength() {
return this.getHint(1);
},
get hintsOffset2() {
return this.getHint(2);
},
get hintsLenth2() {
return this.getHint(3);
},
get objectNumberFirst() {
return this.getInt('O');
},
get endFirst() {
return this.getInt('E');
},
get numPages() {
return this.getInt('N');
},
get mainXRefEntriesOffset() {
return this.getInt('T');
},
get pageFirst() {
return this.getInt('P');
}
};
return constructor;
})();

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var Pattern = (function patternPattern() {
// Constructor should define this.getPattern
function constructor() {
error('should not call Pattern constructor');
}
constructor.prototype = {
// Input: current Canvas context
// Output: the appropriate fillStyle or strokeStyle
getPattern: function pattern_getStyle(ctx) {
error('Should not call Pattern.getStyle: ' + ctx);
}
};
constructor.shadingFromIR = function pattern_shadingFromIR(ctx, raw) {
var obj = window[raw[0]];
return obj.fromIR(ctx, raw);
}
constructor.parseShading = function pattern_shading(shading, matrix,
xref, res, ctx) {
var dict = isStream(shading) ? shading.dict : shading;
var type = dict.get('ShadingType');
switch (type) {
case 2:
case 3:
// both radial and axial shadings are handled by RadialAxial shading
return new RadialAxialShading(dict, matrix, xref, res, ctx);
default:
return new DummyShading();
}
};
return constructor;
})();
var DummyShading = (function dummyShading() {
function constructor() {
this.type = 'Pattern';
}
constructor.fromIR = function() {
return 'hotpink';
}
constructor.prototype = {
getIR: function dummpy_getir() {
return ['DummyShading'];
}
};
return constructor;
})();
// Radial and axial shading have very similar implementations
// If needed, the implementations can be broken into two classes
var RadialAxialShading = (function radialAxialShading() {
function constructor(dict, matrix, xref, res, ctx) {
this.matrix = matrix;
this.coordsArr = dict.get('Coords');
this.shadingType = dict.get('ShadingType');
this.type = 'Pattern';
this.ctx = ctx;
var cs = dict.get('ColorSpace', 'CS');
cs = ColorSpace.parse(cs, xref, res);
this.cs = cs;
var t0 = 0.0, t1 = 1.0;
if (dict.has('Domain')) {
var domainArr = dict.get('Domain');
t0 = domainArr[0];
t1 = domainArr[1];
}
var extendStart = false, extendEnd = false;
if (dict.has('Extend')) {
var extendArr = dict.get('Extend');
extendStart = extendArr[0];
extendEnd = extendArr[1];
TODO('Support extend');
}
this.extendStart = extendStart;
this.extendEnd = extendEnd;
var fnObj = dict.get('Function');
fnObj = xref.fetchIfRef(fnObj);
if (isArray(fnObj))
error('No support for array of functions');
else if (!isPDFFunction(fnObj))
error('Invalid function');
var fn = PDFFunction.parse(xref, fnObj);
// 10 samples seems good enough for now, but probably won't work
// if there are sharp color changes. Ideally, we would implement
// the spec faithfully and add lossless optimizations.
var step = (t1 - t0) / 10;
var diff = t1 - t0;
var colorStops = [];
for (var i = t0; i <= t1; i += step) {
var color = fn([i]);
var rgbColor = Util.makeCssRgb.apply(this, cs.getRgb(color));
colorStops.push([(i - t0) / diff, rgbColor]);
}
this.colorStops = colorStops;
}
constructor.fromIR = function(ctx, 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];
var curMatrix = ctx.mozCurrentTransform;
if (curMatrix) {
var userMatrix = ctx.mozCurrentTransformInverse;
p0 = Util.applyTransform(p0, curMatrix);
p0 = Util.applyTransform(p0, userMatrix);
p1 = Util.applyTransform(p1, curMatrix);
p1 = Util.applyTransform(p1, userMatrix);
}
if (type == 2)
var grad = ctx.createLinearGradient(p0[0], p0[1], p1[0], p1[1]);
else if (type == 3)
var 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;
}
constructor.prototype = {
getIR: function RadialAxialShading_getIR() {
var coordsArr = this.coordsArr;
var type = this.shadingType;
if (type == 2) {
var p0 = [coordsArr[0], coordsArr[1]];
var p1 = [coordsArr[2], coordsArr[3]];
var r0 = null;
var r1 = null;
} else if (type == 3) {
var p0 = [coordsArr[0], coordsArr[1]];
var p1 = [coordsArr[3], coordsArr[4]];
var r0 = coordsArr[2];
var r1 = coordsArr[5];
} else {
error('getPattern type unknown: ' + type);
}
var matrix = this.matrix;
if (matrix) {
p0 = Util.applyTransform(p0, matrix);
p1 = Util.applyTransform(p1, matrix);
}
return ['RadialAxialShading', type, this.colorStops, p0, p1, r0, r1];
}
};
return constructor;
})();
var TilingPattern = (function tilingPattern() {
var PAINT_TYPE_COLORED = 1, PAINT_TYPE_UNCOLORED = 2;
function TilingPattern(IR, color, ctx, objs) {
var IRQueue = IR[2];
this.matrix = IR[3];
var bbox = IR[4];
var xstep = IR[5];
var ystep = IR[6];
var paintType = IR[7];
TODO('TilingType');
this.curMatrix = ctx.mozCurrentTransform;
this.invMatrix = ctx.mozCurrentTransformInverse;
this.ctx = ctx;
this.type = 'Pattern';
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];
// TODO: hack to avoid OOM, we would idealy compute the tiling
// pattern to be only as large as the acual size in device space
// This could be computed with .mozCurrentTransform, but still
// needs to be implemented
while (Math.abs(width) > 512 || Math.abs(height) > 512) {
width = 512;
height = 512;
}
var tmpCanvas = new ScratchCanvas(width, height);
// set the new canvas element context as the graphics context
var tmpCtx = tmpCanvas.getContext('2d');
var graphics = new CanvasGraphics(tmpCtx, objs);
switch (paintType) {
case PAINT_TYPE_COLORED:
tmpCtx.fillStyle = ctx.fillStyle;
tmpCtx.strokeStyle = ctx.strokeStyle;
break;
case PAINT_TYPE_UNCOLORED:
color = Util.makeCssRgb.apply(this, color);
tmpCtx.fillStyle = color;
tmpCtx.strokeStyle = color;
break;
default:
error('Unsupported paint type: ' + paintType);
}
var scale = [width / xstep, height / ystep];
this.scale = scale;
// transform coordinates to pattern space
var tmpTranslate = [1, 0, 0, 1, -topLeft[0], -topLeft[1]];
var tmpScale = [scale[0], 0, 0, scale[1], 0, 0];
graphics.transform.apply(graphics, tmpScale);
graphics.transform.apply(graphics, tmpTranslate);
if (bbox && isArray(bbox) && 4 == bbox.length) {
var bboxWidth = bbox[2] - bbox[0];
var bboxHeight = bbox[3] - bbox[1];
graphics.rectangle(bbox[0], bbox[1], bboxWidth, bboxHeight);
graphics.clip();
graphics.endPath();
}
graphics.executeIRQueue(IRQueue);
this.canvas = tmpCanvas;
}
TilingPattern.getIR = function tiling_getIR(codeIR, dict, args) {
var matrix = dict.get('Matrix');
var bbox = dict.get('BBox');
var xstep = dict.get('XStep');
var ystep = dict.get('YStep');
var paintType = dict.get('PaintType');
return [
'TilingPattern', args, codeIR, matrix, bbox, xstep, ystep, paintType
];
}
TilingPattern.prototype = {
getPattern: function tiling_getPattern() {
var matrix = this.matrix;
var curMatrix = this.curMatrix;
var ctx = this.ctx;
if (curMatrix)
ctx.setTransform.apply(ctx, curMatrix);
if (matrix)
ctx.transform.apply(ctx, matrix);
var scale = this.scale;
ctx.scale(1 / scale[0], 1 / scale[1]);
return ctx.createPattern(this.canvas, 'repeat');
}
};
return TilingPattern;
})();

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
var ERRORS = 0, WARNINGS = 1, TODOS = 5;
var verbosity = WARNINGS;
// Set this to true if you want to use workers.
var useWorker = false;
//
// getPdf()
// Convenience function to perform binary Ajax GET
// Usage: getPdf('http://...', callback)
// getPdf({
// url:String ,
// [,progress:Function, error:Function]
// },
// callback)
//
function getPdf(arg, callback) {
var params = arg;
if (typeof arg === 'string')
params = { url: arg };
var xhr = new XMLHttpRequest();
xhr.open('GET', params.url);
xhr.mozResponseType = xhr.responseType = 'arraybuffer';
xhr.expected = (document.URL.indexOf('file:') === 0) ? 0 : 200;
if ('progress' in params)
xhr.onprogress = params.progress || undefined;
if ('error' in params)
xhr.onerror = params.error || undefined;
xhr.onreadystatechange = function getPdfOnreadystatechange() {
if (xhr.readyState === 4 && xhr.status === xhr.expected) {
var data = (xhr.mozResponseArrayBuffer || xhr.mozResponse ||
xhr.responseArrayBuffer || xhr.response);
callback(data);
}
};
xhr.send(null);
}
var Page = (function pagePage() {
function constructor(xref, pageNumber, pageDict, ref) {
this.pageNumber = pageNumber;
this.pageDict = pageDict;
this.stats = {
create: Date.now(),
compile: 0.0,
fonts: 0.0,
images: 0.0,
render: 0.0
};
this.xref = xref;
this.ref = ref;
}
constructor.prototype = {
getPageProp: function pageGetPageProp(key) {
return this.xref.fetchIfRef(this.pageDict.get(key));
},
inheritPageProp: function pageInheritPageProp(key) {
var dict = this.pageDict;
var obj = dict.get(key);
while (obj === undefined) {
dict = this.xref.fetchIfRef(dict.get('Parent'));
if (!dict)
break;
obj = dict.get(key);
}
return obj;
},
get content() {
return shadow(this, 'content', this.getPageProp('Contents'));
},
get resources() {
return shadow(this, 'resources', this.inheritPageProp('Resources'));
},
get mediaBox() {
var obj = this.inheritPageProp('MediaBox');
// Reset invalid media box to letter size.
if (!isArray(obj) || obj.length !== 4)
obj = [0, 0, 612, 792];
return shadow(this, 'mediaBox', obj);
},
get view() {
var obj = this.inheritPageProp('CropBox');
var view = {
x: 0,
y: 0,
width: this.width,
height: this.height
};
if (isArray(obj) && obj.length == 4) {
var tl = this.rotatePoint(obj[0], obj[1]);
var br = this.rotatePoint(obj[2], obj[3]);
view.x = Math.min(tl.x, br.x);
view.y = Math.min(tl.y, br.y);
view.width = Math.abs(tl.x - br.x);
view.height = Math.abs(tl.y - br.y);
}
return shadow(this, 'cropBox', view);
},
get annotations() {
return shadow(this, 'annotations', this.inheritPageProp('Annots'));
},
get width() {
var mediaBox = this.mediaBox;
var rotate = this.rotate;
var width;
if (rotate == 0 || rotate == 180) {
width = (mediaBox[2] - mediaBox[0]);
} else {
width = (mediaBox[3] - mediaBox[1]);
}
return shadow(this, 'width', width);
},
get height() {
var mediaBox = this.mediaBox;
var rotate = this.rotate;
var height;
if (rotate == 0 || rotate == 180) {
height = (mediaBox[3] - mediaBox[1]);
} else {
height = (mediaBox[2] - mediaBox[0]);
}
return shadow(this, 'height', height);
},
get rotate() {
var rotate = this.inheritPageProp('Rotate') || 0;
// Normalize rotation so it's a multiple of 90 and between 0 and 270
if (rotate % 90 != 0) {
rotate = 0;
} else if (rotate >= 360) {
rotate = rotate % 360;
} else if (rotate < 0) {
// The spec doesn't cover negatives, assume its counterclockwise
// rotation. The following is the other implementation of modulo.
rotate = ((rotate % 360) + 360) % 360;
}
return shadow(this, 'rotate', rotate);
},
startRenderingFromIRQueue: function startRenderingFromIRQueue(
IRQueue, fonts) {
var self = this;
this.IRQueue = IRQueue;
var gfx = new CanvasGraphics(this.ctx, this.objs);
var startTime = Date.now();
var displayContinuation = function pageDisplayContinuation() {
// Always defer call to display() to work around bug in
// Firefox error reporting from XHR callbacks.
setTimeout(function pageSetTimeout() {
try {
self.display(gfx, self.callback);
} catch (e) {
if (self.callback) self.callback(e.toString());
throw e;
}
});
};
this.ensureFonts(fonts, function() {
displayContinuation();
});
},
getIRQueue: function(handler, dependency) {
if (this.IRQueue) {
// content was compiled
return this.IRQueue;
}
var xref = this.xref;
var content = xref.fetchIfRef(this.content);
var resources = xref.fetchIfRef(this.resources);
if (isArray(content)) {
// fetching items
var i, n = content.length;
for (i = 0; i < n; ++i)
content[i] = xref.fetchIfRef(content[i]);
content = new StreamsSequenceStream(content);
}
var pe = this.pe = new PartialEvaluator(
xref, handler, 'p' + this.pageNumber + '_');
var IRQueue = {};
return this.IRQueue = pe.getIRQueue(
content, resources, IRQueue, dependency);
},
ensureFonts: function(fonts, callback) {
// Convert the font names to the corresponding font obj.
for (var i = 0; i < fonts.length; i++) {
fonts[i] = this.objs.objs[fonts[i]].data;
}
// Load all the fonts
var fontObjs = FontLoader.bind(
fonts,
function(fontObjs) {
this.stats.fonts = Date.now();
callback.call(this);
}.bind(this),
this.objs
);
},
display: function(gfx, callback) {
var xref = this.xref;
var resources = xref.fetchIfRef(this.resources);
var mediaBox = xref.fetchIfRef(this.mediaBox);
assertWellFormed(isDict(resources), 'invalid page resources');
gfx.xref = xref;
gfx.res = resources;
gfx.beginDrawing({ x: mediaBox[0], y: mediaBox[1],
width: this.width,
height: this.height,
rotate: this.rotate });
var startIdx = 0;
var length = this.IRQueue.fnArray.length;
var IRQueue = this.IRQueue;
var self = this;
var startTime = Date.now();
function next() {
startIdx = gfx.executeIRQueue(IRQueue, startIdx, next);
if (startIdx == length) {
self.stats.render = Date.now();
if (callback) callback();
}
}
next();
},
rotatePoint: function pageRotatePoint(x, y, reverse) {
var rotate = reverse ? (360 - this.rotate) : this.rotate;
switch (rotate) {
case 180:
return {x: this.width - x, y: y};
case 90:
return {x: this.width - y, y: this.height - x};
case 270:
return {x: y, y: x};
case 360:
case 0:
default:
return {x: x, y: this.height - y};
}
},
getLinks: function pageGetLinks() {
var xref = this.xref;
var annotations = xref.fetchIfRef(this.annotations) || [];
var i, n = annotations.length;
var links = [];
for (i = 0; i < n; ++i) {
var annotation = xref.fetch(annotations[i]);
if (!isDict(annotation))
continue;
var subtype = annotation.get('Subtype');
if (!isName(subtype) || subtype.name != 'Link')
continue;
var rect = annotation.get('Rect');
var topLeftCorner = this.rotatePoint(rect[0], rect[1]);
var bottomRightCorner = this.rotatePoint(rect[2], rect[3]);
var link = {};
link.x = Math.min(topLeftCorner.x, bottomRightCorner.x);
link.y = Math.min(topLeftCorner.y, bottomRightCorner.y);
link.width = Math.abs(topLeftCorner.x - bottomRightCorner.x);
link.height = Math.abs(topLeftCorner.y - bottomRightCorner.y);
var a = this.xref.fetchIfRef(annotation.get('A'));
if (a) {
switch (a.get('S').name) {
case 'URI':
link.url = a.get('URI');
break;
case 'GoTo':
link.dest = a.get('D');
break;
default:
TODO('other link types');
}
} else if (annotation.has('Dest')) {
// simple destination link
var dest = annotation.get('Dest');
link.dest = isName(dest) ? dest.name : dest;
}
links.push(link);
}
return links;
},
startRendering: function(ctx, callback) {
this.ctx = ctx;
this.callback = callback;
this.startRenderingTime = Date.now();
this.pdf.startRendering(this);
}
};
return constructor;
})();
/**
* The `PDFDocModel` holds all the data of the PDF file. Compared to the
* `PDFDoc`, this one doesn't have any job management code.
* Right now there exists one PDFDocModel on the main thread + one object
* for each worker. If there is no worker support enabled, there are two
* `PDFDocModel` objects on the main thread created.
* TODO: Refactor the internal object structure, such that there is no
* need for the `PDFDocModel` anymore and there is only one object on the
* main thread and not one entire copy on each worker instance.
*/
var PDFDocModel = (function pdfDoc() {
function constructor(arg, callback) {
if (isStream(arg))
init.call(this, arg);
else if (isArrayBuffer(arg))
init.call(this, new Stream(arg));
else
error('PDFDocModel: Unknown argument type');
}
function init(stream) {
assertWellFormed(stream.length > 0, 'stream must have data');
this.stream = stream;
this.setup();
}
function find(stream, needle, limit, backwards) {
var pos = stream.pos;
var end = stream.end;
var str = '';
if (pos + limit > end)
limit = end - pos;
for (var n = 0; n < limit; ++n)
str += stream.getChar();
stream.pos = pos;
var index = backwards ? str.lastIndexOf(needle) : str.indexOf(needle);
if (index == -1)
return false; /* not found */
stream.pos += index;
return true; /* found */
}
constructor.prototype = {
get linearization() {
var length = this.stream.length;
var linearization = false;
if (length) {
linearization = new Linearization(this.stream);
if (linearization.length != length)
linearization = false;
}
// shadow the prototype getter with a data property
return shadow(this, 'linearization', linearization);
},
get startXRef() {
var stream = this.stream;
var startXRef = 0;
var linearization = this.linearization;
if (linearization) {
// Find end of first obj.
stream.reset();
if (find(stream, 'endobj', 1024))
startXRef = stream.pos + 6;
} else {
// Find startxref at the end of the file.
var start = stream.end - 1024;
if (start < 0)
start = 0;
stream.pos = start;
if (find(stream, 'startxref', 1024, true)) {
stream.skip(9);
var ch;
do {
ch = stream.getChar();
} while (Lexer.isSpace(ch));
var str = '';
while ((ch - '0') <= 9) {
str += ch;
ch = stream.getChar();
}
startXRef = parseInt(str, 10);
if (isNaN(startXRef))
startXRef = 0;
}
}
// shadow the prototype getter with a data property
return shadow(this, 'startXRef', startXRef);
},
get mainXRefEntriesOffset() {
var mainXRefEntriesOffset = 0;
var linearization = this.linearization;
if (linearization)
mainXRefEntriesOffset = linearization.mainXRefEntriesOffset;
// shadow the prototype getter with a data property
return shadow(this, 'mainXRefEntriesOffset', mainXRefEntriesOffset);
},
// Find the header, remove leading garbage and setup the stream
// starting from the header.
checkHeader: function pdfDocCheckHeader() {
var stream = this.stream;
stream.reset();
if (find(stream, '%PDF-', 1024)) {
// Found the header, trim off any garbage before it.
stream.moveStart();
return;
}
// May not be a PDF file, continue anyway.
},
setup: function pdfDocSetup(ownerPassword, userPassword) {
this.checkHeader();
this.xref = new XRef(this.stream,
this.startXRef,
this.mainXRefEntriesOffset);
this.catalog = new Catalog(this.xref);
},
get numPages() {
var linearization = this.linearization;
var num = linearization ? linearization.numPages : this.catalog.numPages;
// shadow the prototype getter
return shadow(this, 'numPages', num);
},
getPage: function pdfDocGetPage(n) {
return this.catalog.getPage(n);
}
};
return constructor;
})();
var PDFDoc = (function() {
function constructor(arg, callback) {
var stream = null;
var data = null;
if (isStream(arg)) {
stream = arg;
data = arg.bytes;
} else if (isArrayBuffer(arg)) {
stream = new Stream(arg);
data = arg;
} else {
error('PDFDoc: Unknown argument type');
}
this.data = data;
this.stream = stream;
this.pdf = new PDFDocModel(stream);
this.catalog = this.pdf.catalog;
this.objs = new PDFObjects();
this.pageCache = [];
if (useWorker) {
var worker = new Worker('../worker/pdf_worker_loader.js');
} else {
// If we don't use a worker, just post/sendMessage to the main thread.
var worker = {
postMessage: function(obj) {
worker.onmessage({data: obj});
},
terminate: function() {}
};
}
this.worker = worker;
this.fontsLoading = {};
var processorHandler = this.processorHandler =
new MessageHandler('main', worker);
processorHandler.on('page', function(data) {
var pageNum = data.pageNum;
var page = this.pageCache[pageNum];
var depFonts = data.depFonts;
page.startRenderingFromIRQueue(data.IRQueue, depFonts);
}, this);
processorHandler.on('obj', function(data) {
var id = data[0];
var type = data[1];
switch (type) {
case 'JpegStream':
var IR = data[2];
new JpegImage(id, IR, this.objs);
break;
case 'Font':
var name = data[2];
var file = data[3];
var properties = data[4];
if (file) {
var fontFileDict = new Dict();
fontFileDict.map = file.dict.map;
var fontFile = new Stream(file.bytes, file.start,
file.end - file.start, fontFileDict);
// Check if this is a FlateStream. Otherwise just use the created
// Stream one. This makes complex_ttf_font.pdf work.
var cmf = file.bytes[0];
if ((cmf & 0x0f) == 0x08) {
file = new FlateStream(fontFile);
} else {
file = fontFile;
}
}
// For now, resolve the font object here direclty. The real font
// object is then created in FontLoader.bind().
this.objs.resolve(id, {
name: name,
file: file,
properties: properties
});
break;
default:
throw 'Got unkown object type ' + type;
}
}, this);
processorHandler.on('font_ready', function(data) {
var id = data[0];
var font = new FontShape(data[1]);
// If there is no string, then there is nothing to attach to the DOM.
if (!font.str) {
this.objs.resolve(id, font);
} else {
this.objs.setData(id, font);
}
}.bind(this));
if (!useWorker) {
// If the main thread is our worker, setup the handling for the messages
// the main thread sends to it self.
WorkerProcessorHandler.setup(processorHandler);
}
this.workerReadyPromise = new Promise('workerReady');
setTimeout(function() {
processorHandler.send('doc', this.data);
this.workerReadyPromise.resolve(true);
}.bind(this));
}
constructor.prototype = {
get numPages() {
return this.pdf.numPages;
},
startRendering: function(page) {
// The worker might not be ready to receive the page request yet.
this.workerReadyPromise.then(function() {
this.processorHandler.send('page_request', page.pageNumber + 1);
}.bind(this));
},
getPage: function(n) {
if (this.pageCache[n])
return this.pageCache[n];
var page = this.pdf.getPage(n);
// Add a reference to the objects such that Page can forward the reference
// to the CanvasGraphics and so on.
page.objs = this.objs;
page.pdf = this;
return this.pageCache[n] = page;
},
destroy: function() {
if (this.worker)
this.worker.terminate();
if (this.fontWorker)
this.fontWorker.terminate();
for (var n in this.pageCache)
delete this.pageCache[n];
delete this.data;
delete this.stream;
delete this.pdf;
delete this.catalog;
}
};
return constructor;
})();

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280
src/util.js
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function log(msg) {
if (console && console.log)
console.log(msg);
else if (print)
print(msg);
}
function warn(msg) {
if (verbosity >= WARNINGS)
log('Warning: ' + msg);
}
function backtrace() {
var stackStr;
try {
throw new Error();
} catch (e) {
stackStr = e.stack;
}
return stackStr.split('\n').slice(1).join('\n');
}
function error(msg) {
log(backtrace());
throw new Error(msg);
}
function TODO(what) {
if (verbosity >= TODOS)
log('TODO: ' + what);
}
function malformed(msg) {
error('Malformed PDF: ' + msg);
}
function assert(cond, msg) {
if (!cond)
error(msg);
}
// In a well-formed PDF, |cond| holds. If it doesn't, subsequent
// behavior is undefined.
function assertWellFormed(cond, msg) {
if (!cond)
malformed(msg);
}
function shadow(obj, prop, value) {
Object.defineProperty(obj, prop, { value: value,
enumerable: true,
configurable: true,
writable: false });
return value;
}
function bytesToString(bytes) {
var str = '';
var length = bytes.length;
for (var n = 0; n < length; ++n)
str += String.fromCharCode(bytes[n]);
return str;
}
function stringToBytes(str) {
var length = str.length;
var bytes = new Uint8Array(length);
for (var n = 0; n < length; ++n)
bytes[n] = str.charCodeAt(n) & 0xFF;
return bytes;
}
var IDENTITY_MATRIX = [1, 0, 0, 1, 0, 0];
var Util = (function utilUtil() {
function constructor() {}
constructor.makeCssRgb = function makergb(r, g, b) {
var ri = (255 * r) | 0, gi = (255 * g) | 0, bi = (255 * b) | 0;
return 'rgb(' + ri + ',' + gi + ',' + bi + ')';
};
constructor.makeCssCmyk = function makecmyk(c, m, y, k) {
c = (new DeviceCmykCS()).getRgb([c, m, y, k]);
var ri = (255 * c[0]) | 0, gi = (255 * c[1]) | 0, bi = (255 * c[2]) | 0;
return 'rgb(' + ri + ',' + gi + ',' + bi + ')';
};
constructor.applyTransform = function apply(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];
};
return constructor;
})();
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, str2 = '';
if (str[0] === '\xFE' && str[1] === '\xFF') {
// UTF16BE BOM
for (i = 2; i < n; i += 2)
str2 += String.fromCharCode(
(str.charCodeAt(i) << 8) | str.charCodeAt(i + 1));
} else {
for (i = 0; i < n; ++i) {
var code = PDFStringTranslateTable[str.charCodeAt(i)];
str2 += code ? String.fromCharCode(code) : str.charAt(i);
}
}
return str2;
}
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 isNull(v) {
return v === null;
}
function isName(v) {
return v instanceof Name;
}
function isCmd(v, cmd) {
return v instanceof Cmd && (!cmd || v.cmd == cmd);
}
function isDict(v, type) {
return v instanceof Dict && (!type || v.get('Type').name == type);
}
function isArray(v) {
return v instanceof Array;
}
function isStream(v) {
return typeof v == 'object' && v != null && ('getChar' in v);
}
function isArrayBuffer(v) {
return typeof v == 'object' && v != null && ('byteLength' in v);
}
function isRef(v) {
return v instanceof Ref;
}
function isPDFFunction(v) {
var fnDict;
if (typeof v != 'object')
return false;
else if (isDict(v))
fnDict = v;
else if (isStream(v))
fnDict = v.dict;
else
return false;
return fnDict.has('FunctionType');
}
/**
* 'Promise' object.
* Each object that is stored in PDFObjects is based on a Promise object that
* contains the status of the object and the data. There migth be situations,
* where a function want to use the value of an object, but it isn't ready at
* that time. To get a notification, once the object is ready to be used, s.o.
* can add a callback using the `then` method on the promise that then calls
* the callback once the object gets resolved.
* A promise can get resolved only once and only once the data of the promise
* can be set. If any of these happens twice or the data is required before
* it was set, an exception is throw.
*/
var Promise = (function() {
var EMPTY_PROMISE = {};
/**
* If `data` is passed in this constructor, the promise is created resolved.
* If there isn't data, it isn't resolved at the beginning.
*/
function Promise(name, data) {
this.name = name;
// If you build a promise and pass in some data it's already resolved.
if (data != null) {
this.isResolved = true;
this._data = data;
this.hasData = true;
} else {
this.isResolved = false;
this._data = EMPTY_PROMISE;
}
this.callbacks = [];
};
Promise.prototype = {
hasData: false,
set data(data) {
if (data === undefined) {
return;
}
if (this._data !== EMPTY_PROMISE) {
throw 'Promise ' + this.name +
': Cannot set the data of a promise twice';
}
this._data = data;
this.hasData = true;
if (this.onDataCallback) {
this.onDataCallback(data);
}
},
get data() {
if (this._data === EMPTY_PROMISE) {
throw 'Promise ' + this.name + ': Cannot get data that isn\'t set';
}
return this._data;
},
onData: function(callback) {
if (this._data !== EMPTY_PROMISE) {
callback(this._data);
} else {
this.onDataCallback = callback;
}
},
resolve: function(data) {
if (this.isResolved) {
throw 'A Promise can be resolved only once ' + this.name;
}
this.isResolved = true;
this.data = data;
var callbacks = this.callbacks;
for (var i = 0; i < callbacks.length; i++) {
callbacks[i].call(null, data);
}
},
then: function(callback) {
if (!callback) {
throw 'Requiring callback' + this.name;
}
// If the promise is already resolved, call the callback directly.
if (this.isResolved) {
var data = this.data;
callback.call(null, data);
} else {
this.callbacks.push(callback);
}
}
};
return Promise;
})();

0
utils/cffStandardStrings.js → src/utils/cffStandardStrings.js
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0
utils/fonts_utils.js → src/utils/fonts_utils.js
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0
worker/console.js → src/worker/console.js
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0
worker/message_handler.js → src/worker/message_handler.js
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0
worker/pdf_worker_loader.js → src/worker/pdf_worker_loader.js
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0
worker/processor_handler.js → src/worker/processor_handler.js
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28
web/viewer.html
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@ -6,15 +6,25 @@
<script type="text/javascript" src="compatibility.js"></script> <script type="text/javascript" src="compatibility.js"></script>
<script type="text/javascript" src="viewer.js"></script> <script type="text/javascript" src="viewer.js"></script>
<script type="text/javascript" src="../pdf.js"></script> <script type="text/javascript" src="../src/pdf.js"></script>
<script type="text/javascript" src="../fonts.js"></script> <script type="text/javascript" src="../src/util.js"></script>
<script type="text/javascript" src="../crypto.js"></script> <script type="text/javascript" src="../src/canvas.js"></script>
<script type="text/javascript" src="../glyphlist.js"></script> <script type="text/javascript" src="../src/function.js"></script>
<script type="text/javascript" src="../metrics.js"></script> <script type="text/javascript" src="../src/colorspace.js"></script>
<script type="text/javascript" src="../charsets.js"></script> <script type="text/javascript" src="../src/image.js"></script>
<script type="text/javascript" src="../cidmaps.js"></script> <script type="text/javascript" src="../src/pattern.js"></script>
<script type="text/javascript" src="../worker/message_handler.js"></script> <script type="text/javascript" src="../src/obj.js"></script>
<script type="text/javascript" src="../worker/processor_handler.js"></script> <script type="text/javascript" src="../src/parser.js"></script>
<script type="text/javascript" src="../src/evaluator.js"></script>
<script type="text/javascript" src="../src/stream.js"></script>
<script type="text/javascript" src="../src/fonts.js"></script>
<script type="text/javascript" src="../src/crypto.js"></script>
<script type="text/javascript" src="../src/glyphlist.js"></script>
<script type="text/javascript" src="../src/metrics.js"></script>
<script type="text/javascript" src="../src/charsets.js"></script>
<script type="text/javascript" src="../src/cidmaps.js"></script>
<script type="text/javascript" src="../src/worker/message_handler.js"></script>
<script type="text/javascript" src="../src/worker/processor_handler.js"></script>
</head> </head>
<body> <body>

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