Merge branch 'master' of https://github.com/mozilla/pdf.js into amowarnings

Makefile

@@ -3,6 +3,7 @@ BUILD_DIR := build
 BUILD_TARGET := $(BUILD_DIR)/pdf.js
 DEFAULT_BROWSERS := resources/browser_manifests/browser_manifest.json
 DEFAULT_TESTS := test_manifest.json
+DEFAULT_PYTHON := python2.7
 
 EXTENSION_SRC := ./extensions/
 EXTENSION_BASE_VERSION := 4bb289ec499013de66eb421737a4dbb4a9273eda
@@ -36,6 +37,7 @@ PDF_JS_FILES = \
   stream.js \
   worker.js \
   ../external/jpgjs/jpg.js \
+  jpx.js \
 	$(NULL)
 
 # make server
@@ -43,7 +45,7 @@ PDF_JS_FILES = \
 # This target starts a local web server at localhost:8888. This can be
 # used for testing all browsers.
 server:
-	@cd test; python test.py --port=8888;
+	@cd test; $(DEFAULT_PYTHON) test.py --port=8888;
 
 # make test
 #
@@ -106,7 +108,7 @@ browser-test:
 	fi;
 
 	cd test; \
-	python test.py --reftest \
+	$(DEFAULT_PYTHON) test.py --reftest \
 	--browserManifestFile=$(PDF_BROWSERS) \
 	--manifestFile=$(PDF_TESTS)
 

README.md

@@ -1,9 +1,6 @@
-# pdf.js
+# PDF.JS
 
 
-
-## Overview
-
 pdf.js is an HTML5 technology experiment that explores building a faithful
 and efficient Portable Document Format (PDF) renderer without native code 
 assistance.
@@ -16,7 +13,7 @@ successful.
 
  
 
-## Getting started
+# Getting started
 
 ### Online demo
 
@@ -29,11 +26,12 @@ using the pdf.js API.
 
 ### Extension
 
-An up-to-date Firefox extension is also available:
+A Firefox extension is also available:
 
 + http://mozilla.github.com/pdf.js/extensions/firefox/pdf.js.xpi
 
-(The above link is updated upon every merge to our master branch).
+Note that this extension is self-updating, and by default Firefox will auto-update extensions on a 
+daily basis (you can change this through the `extensions.update.interval` option in `about:config`).
 
 For an experimental Chrome extension, get the code as explained below and issue `make extension`. 
 Then open Chrome with the flag `--enable-experimental-extension-apis`, go to `Tools > Extension`
@@ -68,12 +66,12 @@ In order to bundle all `src/` files into a final `pdf.js`, issue:
 This will generate the file `build/pdf.js` that can be included in your final project. (WARNING: That's a large file! Consider minifying it).
 
 
-## Learning
+# Learning
 
 Here are some initial pointers to help contributors get off the ground. 
 Additional resources are available in a separate section below.
 
-#### Hello world
+### Hello world
 
 For a "hello world" example, take a look at:
 
@@ -82,7 +80,7 @@ For a "hello world" example, take a look at:
 This example illustrates the bare minimum ingredients for integrating pdf.js
 in a custom project.
 
-#### Introductory video
+### Introductory video
 
 Check out the presentation by our contributor Julian Viereck on the inner 
 workings of PDF and pdf.js:
@@ -92,7 +90,7 @@ workings of PDF and pdf.js:
 
 
 
-## Contributing
+# Contributing
 
 pdf.js is a community-driven project, so contributors are always welcome. 
 Simply fork our repo and contribute away. Good starting places for picking
@@ -122,7 +120,7 @@ You can add your name to it! :)
 
 
 
-## Running the tests
+# Running the tests
 
 pdf.js comes with browser-level regression tests that allow one to probe 
 whether it's able to successfully parse PDFs, as well as compare its output
@@ -148,7 +146,7 @@ images. The test type `load` simply tests whether the file loads without
 raising any errors.
 
 
-## Running tests through our bot
+### Running tests through our bot
 
 If you are a reviewer, you can use our remote bot to issue comprehensive tests 
 against reference images before merging pull requests.
@@ -158,7 +156,7 @@ See the bot repo for details:
 + https://github.com/mozilla/pdf.js-bot
 
 
-## Additional resources
+# Additional resources
 
 Gallery of user projects and modifications:
 
@@ -188,7 +186,7 @@ Follow us on twitter: @pdfjs
   
   
   
-## PDF-related resources
+### PDF-related resources
 
 A really basic overview of PDF is described here:
 

examples/acroforms/index.html

@@ -23,6 +23,7 @@
   <script type="text/javascript" src="../../src/stream.js"></script>
   <script type="text/javascript" src="../../src/worker.js"></script>
   <script type="text/javascript" src="../../external/jpgjs/jpg.js"></script>
+  <script type="text/javascript" src="../../src/jpx.js"></script>
 
   <script type="text/javascript">
     // Specify the main script used to create a new PDF.JS web worker.

examples/helloworld/index.html

@@ -23,6 +23,7 @@
   <script type="text/javascript" src="../../src/stream.js"></script>
   <script type="text/javascript" src="../../src/worker.js"></script>
   <script type="text/javascript" src="../../external/jpgjs/jpg.js"></script>
+  <script type="text/javascript" src="../../src/jpx.js"></script>
 
   <script type="text/javascript">
     // Specify the main script used to create a new PDF.JS web worker.

src/canvas.js

@@ -48,6 +48,7 @@ var CanvasExtraState = (function CanvasExtraStateClosure() {
     // Note: fill alpha applies to all non-stroking operations
     this.fillAlpha = 1;
     this.strokeAlpha = 1;
+    this.lineWidth = 1;
 
     this.old = old;
   }
@@ -329,6 +330,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
 
     // Graphics state
     setLineWidth: function canvasGraphicsSetLineWidth(width) {
+      this.current.lineWidth = width;
       this.ctx.lineWidth = width;
     },
     setLineCap: function canvasGraphicsSetLineCap(style) {
@@ -442,6 +444,8 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       consumePath = typeof consumePath !== 'undefined' ? consumePath : true;
       var ctx = this.ctx;
       var strokeColor = this.current.strokeColor;
+      if (this.current.lineWidth === 0)
+        ctx.lineWidth = this.getSinglePixelWidth();
       // For stroke we want to temporarily change the global alpha to the
       // stroking alpha.
       ctx.globalAlpha = this.current.strokeAlpha;
@@ -544,7 +548,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       var fontObj = this.objs.get(fontRefName).fontObj;
 
       if (!fontObj) {
-        throw 'Can\'t find font for ' + fontRefName;
+        error('Can\'t find font for ' + fontRefName);
       }
 
       var name = fontObj.loadedName || 'sans-serif';
@@ -640,7 +644,6 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
         ctx.translate(current.x, current.y);
 
         ctx.scale(textHScale, 1);
-        ctx.lineWidth /= current.textMatrix[0];
 
         if (textSelection) {
           this.save();
@@ -677,7 +680,15 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       } else {
         ctx.save();
         this.applyTextTransforms();
-        ctx.lineWidth /= current.textMatrix[0] * fontMatrix[0];
+
+        var lineWidth = current.lineWidth;
+        var scale = Math.abs(current.textMatrix[0] * fontMatrix[0]);
+        if (scale == 0 || lineWidth == 0)
+          lineWidth = this.getSinglePixelWidth();
+        else
+          lineWidth /= scale;
+
+        ctx.lineWidth = lineWidth;
 
         if (textSelection)
           text.geom = this.getTextGeometry();
@@ -855,7 +866,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
       } else if (IR[0] == 'RadialAxial' || IR[0] == 'Dummy') {
         var pattern = Pattern.shadingFromIR(this.ctx, IR);
       } else {
-        throw 'Unkown IR type';
+        error('Unkown IR type ' + IR[0]);
       }
       return pattern;
     },
@@ -1142,6 +1153,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
     },
     restoreFillRule: function canvasGraphicsRestoreFillRule(rule) {
       this.ctx.mozFillRule = rule;
+    },
+    getSinglePixelWidth: function getSinglePixelWidth(scale) {
+      var inverse = this.ctx.mozCurrentTransformInverse;
+      return Math.abs(inverse[0] + inverse[2]);
     }
   };
 

src/colorspace.js

@@ -369,55 +369,16 @@ var DeviceCmykCS = (function DeviceCmykCSClosure() {
   DeviceCmykCS.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;
+
+      // CMYK -> CMY: http://www.easyrgb.com/index.php?X=MATH&H=14#text14
+      c = (c * (1 - k) + k);
+      m = (m * (1 - k) + k);
+      y = (y * (1 - k) + k);
+
+      // CMY -> RGB: http://www.easyrgb.com/index.php?X=MATH&H=12#text12
+      var r = (1 - c);
+      var g = (1 - m);
+      var b = (1 - y);
 
       return [r, g, b];
     },

src/core.js

@@ -410,14 +410,14 @@ var Page = (function PageClosure() {
             if (callback)
               callback(e);
             else
-              throw e;
+              error(e);
           }
         }.bind(this),
         function pageDisplayReadPromiseError(reason) {
           if (callback)
             callback(reason);
           else
-            throw reason;
+            error(reason);
         }
       );
     }
@@ -620,7 +620,7 @@ var PDFDoc = (function PDFDocClosure() {
     if (!globalScope.PDFJS.disableWorker && typeof Worker !== 'undefined') {
       var workerSrc = PDFJS.workerSrc;
       if (typeof workerSrc === 'undefined') {
-        throw 'No PDFJS.workerSrc specified';
+        error('No PDFJS.workerSrc specified');
       }
 
       try {
@@ -728,7 +728,7 @@ var PDFDoc = (function PDFDocClosure() {
             });
             break;
           default:
-            throw 'Got unkown object type ' + type;
+            error('Got unkown object type ' + type);
         }
       }, this);
 
@@ -749,7 +749,7 @@ var PDFDoc = (function PDFDocClosure() {
         if (page.displayReadyPromise)
           page.displayReadyPromise.reject(data.error);
         else
-          throw data.error;
+          error(data.error);
       }, this);
 
       messageHandler.on('jpeg_decode', function(data, promise) {

src/evaluator.js

@@ -481,8 +481,10 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           properties.cidToGidMap = this.readCidToGidMap(cidToGidMap);
       }
 
+      var flags = properties.flags;
       var differences = [];
-      var baseEncoding = Encodings.StandardEncoding;
+      var baseEncoding = !!(flags & FontFlags.Symbolic) ?
+                         Encodings.symbolsEncoding : Encodings.StandardEncoding;
       var hasEncoding = dict.has('Encoding');
       if (hasEncoding) {
         var encoding = xref.fetchIfRef(dict.get('Encoding'));
@@ -761,8 +763,9 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           // Simulating descriptor flags attribute
           var fontNameWoStyle = baseFontName.split('-')[0];
           var flags = (serifFonts[fontNameWoStyle] ||
-            (fontNameWoStyle.search(/serif/gi) != -1) ? 2 : 0) |
-            (symbolsFonts[fontNameWoStyle] ? 4 : 32);
+            (fontNameWoStyle.search(/serif/gi) != -1) ? FontFlags.Serif : 0) |
+            (symbolsFonts[fontNameWoStyle] ? FontFlags.Symbolic :
+            FontFlags.Nonsymbolic);
 
           var properties = {
             type: type.name,

src/fonts.js

@@ -19,6 +19,18 @@ var kPDFGlyphSpaceUnits = 1000;
 // Until hinting is fully supported this constant can be used
 var kHintingEnabled = false;
 
+var FontFlags = {
+  FixedPitch: 1,
+  Serif: 2,
+  Symbolic: 4,
+  Script: 8,
+  Nonsymbolic: 32,
+  Italic: 64,
+  AllCap: 65536,
+  SmallCap: 131072,
+  ForceBold: 262144
+};
+
 var Encodings = {
   get ExpertEncoding() {
     return shadow(this, 'ExpertEncoding', ['', '', '', '', '', '', '', '', '',
@@ -160,19 +172,20 @@ var Encodings = {
       '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'
+      '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() {
@@ -405,6 +418,19 @@ var symbolsFonts = {
   'Dingbats': true, 'Symbol': true, 'ZapfDingbats': true
 };
 
+// Some characters, e.g. copyrightserif, mapped to the private use area and
+// might not be displayed using standard fonts. Mapping/hacking well-known chars
+// to the similar equivalents in the normal characters range.
+function mapPrivateUseChars(code) {
+  switch (code) {
+    case 0xF8E9: // copyrightsans
+    case 0xF6D9: // copyrightserif
+      return 0x00A9; // copyright
+    default:
+      return code;
+  }
+}
+
 var FontLoader = {
   listeningForFontLoad: false,
 
@@ -761,8 +787,8 @@ var Font = (function FontClosure() {
     var names = name.split('+');
     names = names.length > 1 ? names[1] : names[0];
     names = names.split(/[-,_]/g)[0];
-    this.isSerifFont = !!(properties.flags & 2);
-    this.isSymbolicFont = !!(properties.flags & 4);
+    this.isSerifFont = !!(properties.flags & FontFlags.Serif);
+    this.isSymbolicFont = !!(properties.flags & FontFlags.Symbolic);
 
     var type = properties.type;
     this.type = type;
@@ -2136,10 +2162,11 @@ var Font = (function FontClosure() {
                  window.btoa(data) + ');');
       var rule = "@font-face { font-family:'" + fontName + "';src:" + url + '}';
 
+      var styleElement = document.createElement('style');
       document.documentElement.getElementsByTagName('head')[0].appendChild(
-        document.createElement('style'));
+        styleElement);
 
-      var styleSheet = document.styleSheets[document.styleSheets.length - 1];
+      var styleSheet = styleElement.sheet;
       styleSheet.insertRule(rule, styleSheet.cssRules.length);
 
       return rule;
@@ -2185,7 +2212,7 @@ var Font = (function FontClosure() {
         case 'CIDFontType0':
           if (this.noUnicodeAdaptation) {
             width = this.widths[this.unicodeToCID[charcode] || charcode];
-            unicode = charcode;
+            unicode = mapPrivateUseChars(charcode);
             break;
           }
           unicode = this.toUnicode[charcode] || charcode;
@@ -2193,7 +2220,7 @@ var Font = (function FontClosure() {
         case 'CIDFontType2':
           if (this.noUnicodeAdaptation) {
             width = this.widths[this.unicodeToCID[charcode] || charcode];
-            unicode = charcode;
+            unicode = mapPrivateUseChars(charcode);
             break;
           }
           unicode = this.toUnicode[charcode] || charcode;
@@ -2203,7 +2230,7 @@ var Font = (function FontClosure() {
           if (!isNum(width))
             width = this.widths[glyphName];
           if (this.noUnicodeAdaptation) {
-            unicode = GlyphsUnicode[glyphName] || charcode;
+            unicode = mapPrivateUseChars(GlyphsUnicode[glyphName] || charcode);
             break;
           }
           unicode = this.glyphNameMap[glyphName] ||
@@ -2234,9 +2261,8 @@ var Font = (function FontClosure() {
           }
 
           // MacRoman encoding address by re-encoding the cmap table
-          unicode = glyphName in GlyphsUnicode ?
-            GlyphsUnicode[glyphName] :
-            this.glyphNameMap[glyphName];
+          unicode = glyphName in this.glyphNameMap ?
+            this.glyphNameMap[glyphName] : GlyphsUnicode[glyphName];
           break;
         default:
           warn('Unsupported font type: ' + this.type);
@@ -3339,15 +3365,9 @@ var Type2CFF = (function Type2CFFClosure() {
         inverseEncoding[encoding[charcode]] = charcode | 0;
       for (var i = 0, ii = charsets.length; i < ii; i++) {
         var glyph = charsets[i];
-        if (glyph == '.notdef') {
-          charstrings.push({
-            unicode: 0,
-            code: 0,
-            gid: i,
-            glyph: glyph
-          });
+        if (glyph == '.notdef')
           continue;
-        }
+
         var code = inverseEncoding[i];
         if (!code || isSpecialUnicode(code)) {
           unassignedUnicodeItems.push(i);

src/obj.js

@@ -574,7 +574,7 @@ var XRef = (function XRefClosure() {
       var stream, parser;
       if (e.uncompressed) {
         if (e.gen != gen)
-          throw ('inconsistent generation in XRef');
+          error('inconsistent generation in XRef');
         stream = this.stream.makeSubStream(e.offset);
         parser = new Parser(new Lexer(stream), true, this);
         var obj1 = parser.getObj();
@@ -703,7 +703,7 @@ var PDFObjects = (function PDFObjectsClosure() {
       // 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;
+        error('Requesting object that isn\'t resolved yet ' + objId);
         return null;
       } else {
         return obj.data;

src/parser.js

@@ -240,6 +240,10 @@ var Parser = (function ParserClosure() {
         var bytes = stream.getBytes(length);
         return new JpegStream(bytes, stream.dict, this.xref);
       }
+      if (name == 'JPXDecode' || name == 'JPX') {
+        var bytes = stream.getBytes(length);
+        return new JpxStream(bytes, stream.dict);
+      }
       if (name == 'ASCII85Decode' || name == 'A85') {
         return new Ascii85Stream(stream);
       }
@@ -249,6 +253,9 @@ var Parser = (function ParserClosure() {
       if (name == 'CCITTFaxDecode' || name == 'CCF') {
         return new CCITTFaxStream(stream, params);
       }
+      if (name == 'RunLengthDecode') {
+        return new RunLengthStream(stream);
+      }
       warn('filter "' + name + '" not supported yet');
       return stream;
     }

src/stream.js

@@ -821,6 +821,7 @@ var JpegStream = (function JpegStreamClosure() {
   JpegStream.prototype.ensureBuffer = function jpegStreamEnsureBuffer(req) {
     if (this.bufferLength)
       return;
+    try {
       var jpegImage = new JpegImage();
       if (this.colorTransform != -1)
         jpegImage.colorTransform = this.colorTransform;
@@ -830,6 +831,9 @@ var JpegStream = (function JpegStreamClosure() {
       var data = jpegImage.getData(width, height);
       this.buffer = data;
       this.bufferLength = data.length;
+    } catch (e) {
+      error('JPEG error: ' + e);
+    }
   };
   JpegStream.prototype.getIR = function jpegStreamGetIR() {
     return bytesToString(this.bytes);
@@ -869,6 +873,107 @@ var JpegStream = (function JpegStreamClosure() {
   return JpegStream;
 })();
 
+/**
+ * For JPEG 2000's we use a library to decode these images and
+ * the stream behaves like all the other DecodeStreams.
+ */
+var JpxStream = (function JpxStreamClosure() {
+  function JpxStream(bytes, dict) {
+    this.dict = dict;
+    this.bytes = bytes;
+
+    DecodeStream.call(this);
+  }
+
+  JpxStream.prototype = Object.create(DecodeStream.prototype);
+
+  JpxStream.prototype.ensureBuffer = function jpxStreamEnsureBuffer(req) {
+    if (this.bufferLength)
+      return;
+
+    var jpxImage = new JpxImage();
+    jpxImage.parse(this.bytes);
+
+    var width = jpxImage.width;
+    var height = jpxImage.height;
+    var componentsCount = jpxImage.componentsCount;
+    if (componentsCount != 1 && componentsCount != 3 && componentsCount != 4)
+      error('JPX with ' + componentsCount + ' components is not supported');
+
+    var data = new Uint8Array(width * height * componentsCount);
+
+    for (var k = 0, kk = jpxImage.tiles.length; k < kk; k++) {
+      var tileCompoments = jpxImage.tiles[k];
+      var tileWidth = tileCompoments[0].width;
+      var tileHeight = tileCompoments[0].height;
+      var tileLeft = tileCompoments[0].left;
+      var tileTop = tileCompoments[0].top;
+
+      var dataPosition, sourcePosition, data0, data1, data2, data3, rowFeed;
+      switch (componentsCount) {
+        case 1:
+          data0 = tileCompoments[0].items;
+
+          dataPosition = width * tileTop + tileLeft;
+          rowFeed = width - tileWidth;
+          sourcePosition = 0;
+          for (var j = 0; j < tileHeight; j++) {
+            for (var i = 0; i < tileWidth; i++)
+              data[dataPosition++] = data0[sourcePosition++];
+            dataPosition += rowFeed;
+          }
+          break;
+        case 3:
+          data0 = tileCompoments[0].items;
+          data1 = tileCompoments[1].items;
+          data2 = tileCompoments[2].items;
+
+          dataPosition = (width * tileTop + tileLeft) * 3;
+          rowFeed = (width - tileWidth) * 3;
+          sourcePosition = 0;
+          for (var j = 0; j < tileHeight; j++) {
+            for (var i = 0; i < tileWidth; i++) {
+              data[dataPosition++] = data0[sourcePosition];
+              data[dataPosition++] = data1[sourcePosition];
+              data[dataPosition++] = data2[sourcePosition];
+              sourcePosition++;
+            }
+            dataPosition += rowFeed;
+          }
+          break;
+        case 4:
+          data0 = tileCompoments[0].items;
+          data1 = tileCompoments[1].items;
+          data2 = tileCompoments[2].items;
+          data3 = tileCompoments[3].items;
+
+          dataPosition = (width * tileTop + tileLeft) * 4;
+          rowFeed = (width - tileWidth) * 4;
+          sourcePosition = 0;
+          for (var j = 0; j < tileHeight; j++) {
+            for (var i = 0; i < tileWidth; i++) {
+              data[dataPosition++] = data0[sourcePosition];
+              data[dataPosition++] = data1[sourcePosition];
+              data[dataPosition++] = data2[sourcePosition];
+              data[dataPosition++] = data3[sourcePosition];
+              sourcePosition++;
+            }
+            dataPosition += rowFeed;
+          }
+          break;
+      }
+    }
+
+    this.buffer = data;
+    this.bufferLength = data.length;
+  };
+  JpxStream.prototype.getChar = function jpxStreamGetChar() {
+    error('internal error: getChar is not valid on JpxStream');
+  };
+
+  return JpxStream;
+})();
+
 var DecryptStream = (function DecryptStreamClosure() {
   function DecryptStream(str, decrypt) {
     this.str = str;
@@ -1041,6 +1146,51 @@ var AsciiHexStream = (function AsciiHexStreamClosure() {
   return AsciiHexStream;
 })();
 
+var RunLengthStream = (function RunLengthStreamClosure() {
+  function RunLengthStream(str) {
+    this.str = str;
+    this.dict = str.dict;
+
+    DecodeStream.call(this);
+  }
+
+  RunLengthStream.prototype = Object.create(DecodeStream.prototype);
+
+  RunLengthStream.prototype.readBlock = function runLengthStreamReadBlock() {
+    // The repeatHeader has following format. The first byte defines type of run
+    // and amount of bytes to repeat/copy: n = 0 through 127 - copy next n bytes
+    // (in addition to the second byte from the header), n = 129 through 255 -
+    // duplicate the second byte from the header (257 - n) times, n = 128 - end.
+    var repeatHeader = this.str.getBytes(2);
+    if (!repeatHeader || repeatHeader.length < 2 || repeatHeader[0] == 128) {
+      this.eof = true;
+      return;
+    }
+
+    var bufferLength = this.bufferLength;
+    var n = repeatHeader[0];
+    if (n < 128) {
+      // copy n bytes
+      var buffer = this.ensureBuffer(bufferLength + n + 1);
+      buffer[bufferLength++] = repeatHeader[1];
+      if (n > 0) {
+        var source = this.str.getBytes(n);
+        buffer.set(source, bufferLength);
+        bufferLength += n;
+      }
+    } else {
+      n = 257 - n;
+      var b = repeatHeader[1];
+      var buffer = this.ensureBuffer(bufferLength + n + 1);
+      for (var i = 0; i < n; i++)
+        buffer[bufferLength++] = b;
+    }
+    this.bufferLength = bufferLength;
+  };
+
+  return RunLengthStream;
+})();
+
 var CCITTFaxStream = (function CCITTFaxStreamClosure() {
 
   var ccittEOL = -2;

src/util.js

@@ -255,8 +255,8 @@ var Promise = (function PromiseClosure() {
         return;
       }
       if (this._data !== EMPTY_PROMISE) {
-        throw 'Promise ' + this.name +
-                                ': Cannot set the data of a promise twice';
+        error('Promise ' + this.name +
+              ': Cannot set the data of a promise twice');
       }
       this._data = value;
       this.hasData = true;
@@ -268,7 +268,7 @@ var Promise = (function PromiseClosure() {
 
     get data() {
       if (this._data === EMPTY_PROMISE) {
-        throw 'Promise ' + this.name + ': Cannot get data that isn\'t set';
+        error('Promise ' + this.name + ': Cannot get data that isn\'t set');
       }
       return this._data;
     },
@@ -283,10 +283,10 @@ var Promise = (function PromiseClosure() {
 
     resolve: function promiseResolve(data) {
       if (this.isResolved) {
-        throw 'A Promise can be resolved only once ' + this.name;
+        error('A Promise can be resolved only once ' + this.name);
       }
       if (this.isRejected) {
-        throw 'The Promise was already rejected ' + this.name;
+        error('The Promise was already rejected ' + this.name);
       }
 
       this.isResolved = true;
@@ -300,10 +300,10 @@ var Promise = (function PromiseClosure() {
 
     reject: function proimseReject(reason) {
       if (this.isRejected) {
-        throw 'A Promise can be rejected only once ' + this.name;
+        error('A Promise can be rejected only once ' + this.name);
       }
       if (this.isResolved) {
-        throw 'The Promise was already resolved ' + this.name;
+        error('The Promise was already resolved ' + this.name);
       }
 
       this.isRejected = true;
@@ -317,7 +317,7 @@ var Promise = (function PromiseClosure() {
 
     then: function promiseThen(callback, errback) {
       if (!callback) {
-        throw 'Requiring callback' + this.name;
+        error('Requiring callback' + this.name);
       }
 
       // If the promise is already resolved, call the callback directly.

src/worker.js

@@ -26,7 +26,7 @@ function MessageHandler(name, comObj) {
         delete callbacks[callbackId];
         callback(data.data);
       } else {
-        throw 'Cannot resolve callback ' + callbackId;
+        error('Cannot resolve callback ' + callbackId);
       }
     } else if (data.action in ah) {
       var action = ah[data.action];
@@ -44,7 +44,7 @@ function MessageHandler(name, comObj) {
         action[0].call(action[1], data.data);
       }
     } else {
-      throw 'Unkown action from worker: ' + data.action;
+      error('Unkown action from worker: ' + data.action);
     }
   };
 }
@@ -53,7 +53,7 @@ MessageHandler.prototype = {
   on: function messageHandlerOn(actionName, handler, scope) {
     var ah = this.actionHandler;
     if (ah[actionName]) {
-      throw 'There is already an actionName called "' + actionName + '"';
+      error('There is already an actionName called "' + actionName + '"');
     }
     ah[actionName] = [handler, scope];
   },
@@ -208,6 +208,7 @@ var workerConsole = {
       action: 'console_error',
       data: args
     });
+    throw 'pdf.js execution error';
   },
 
   time: function time(name) {
@@ -217,7 +218,7 @@ var workerConsole = {
   timeEnd: function timeEnd(name) {
     var time = consoleTimer[name];
     if (time == null) {
-      throw 'Unkown timer name ' + name;
+      error('Unkown timer name ' + name);
     }
     this.log('Timer:', name, Date.now() - time);
   }

src/worker_loader.js

@@ -23,7 +23,8 @@ var files = [
   'pattern.js',
   'stream.js',
   'worker.js',
-  '../external/jpgjs/jpg.js'
+  '../external/jpgjs/jpg.js',
+  'jpx.js'
 ];
 
 // Load all the files.

test/.gitignore

@@ -0,0 +1,3 @@
+ref/
+tmp/
+

test/pdfs/.gitignore

@@ -22,3 +22,5 @@
 !issue918.pdf
 !smaskdim.pdf
 !type4psfunc.pdf
+!S2.pdf
+!zerowidthline.pdf

test/pdfs/issue1096.pdf.link

@@ -0,0 +1 @@
+http://www.faithaliveresources.org/Content/Site135/FilesSamples/105315400440pdf_00000009843.pdf

test/pdfs/issue1127.pdf.link

@@ -0,0 +1 @@
+https://vmp.ethz.ch/pdfs/diplome/vordiplome/Block%201/Algorithmen_%26_Komplexitaet/AlgoKo_f08_Aufg.pdf

test/test.py

@@ -9,7 +9,7 @@ USAGE_EXAMPLE = "%prog"
 # The local web server uses the git repo as the document root.
 DOC_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__),".."))
 
-ANAL = True
+GIT_CLONE_CHECK = True
 DEFAULT_MANIFEST_FILE = 'test_manifest.json'
 EQLOG_FILE = 'eq.log'
 BROWSERLOG_FILE = 'browser.log'
@@ -344,7 +344,7 @@ def verifyPDFs(manifestList):
 
 def setUp(options):
     # Only serve files from a pdf.js clone
-    assert not ANAL or os.path.isfile('../src/pdf.js') and os.path.isdir('../.git')
+    assert not GIT_CLONE_CHECK or os.path.isfile('../src/pdf.js') and os.path.isdir('../.git')
 
     if options.masterMode and os.path.isdir(TMPDIR):
         print 'Temporary snapshot dir tmp/ is still around.'

test/test_manifest.json

@@ -176,7 +176,6 @@
        "md5": "eb7b224107205db4fea9f7df0185f77d",
        "link": true,
        "rounds": 1,
-       "skipPages": [12,31],
        "type": "eq"
     },
     {  "id": "fips197",
@@ -403,6 +402,21 @@
       "link": true,
       "type": "eq"
     },
+    {  "id": "issue1096",
+      "file": "pdfs/issue1096.pdf",
+      "md5": "7f75d2b4b93c78d401ff39e8c1b00612",
+      "rounds": 1,
+      "pageLimit": 10,
+      "link": true,
+      "type": "eq"
+    },
+    {  "id": "issue1127",
+      "file": "pdfs/issue1127.pdf",
+      "md5": "4fb2be5ffefeafda4ba977de2a1bb4d8",
+      "rounds": 1,
+      "link": true,
+      "type": "eq"
+    },
     {  "id": "liveprogramming",
       "file": "pdfs/liveprogramming.pdf",
       "md5": "7bd4dad1188232ef597d36fd72c33e52",
@@ -411,11 +425,24 @@
       "link": true,
       "type": "load"
     },
+    {  "id": "S2-eq",
+       "file": "pdfs/S2.pdf",
+       "md5": "d0b6137846df6e0fe058f234a87fb588",
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue1055",
       "file": "pdfs/issue1055.pdf",
       "md5": "3ba56c2e48dce81da8669b1b9cf98ff0",
       "rounds": 1,
       "link": true,
       "type": "eq"
+    },
+    {  "id": "zerowidthline",
+      "file": "pdfs/zerowidthline.pdf",
+      "md5": "295d26e61a85635433f8e4b768953f60",
+      "rounds": 1,
+      "link": false,
+      "type": "eq"
     }
 ]

test/test_slave.html

@@ -22,6 +22,7 @@
     <script type="text/javascript" src="/src/stream.js"></script>
     <script type="text/javascript" src="/src/worker.js"></script>
     <script type="text/javascript" src="/external/jpgjs/jpg.js"></script>
+    <script type="text/javascript" src="/src/jpx.js"></script>
     <script type="text/javascript" src="driver.js"></script>
 
     <script type="text/javascript">

web/compatibility.js

@@ -224,3 +224,10 @@
     }
   });
 })();
+
+// Check console compatability
+(function checkConsoleCompatibility() {
+  if (typeof console == 'undefined') {
+    console = {log: function() {}};
+  }
+})();

web/viewer.html

@@ -28,6 +28,7 @@
         <script type="text/javascript" src="../src/stream.js"></script>  <!-- PDFJSSCRIPT_REMOVE -->
         <script type="text/javascript" src="../src/worker.js"></script>  <!-- PDFJSSCRIPT_REMOVE -->
         <script type="text/javascript" src="../external/jpgjs/jpg.js"></script>  <!-- PDFJSSCRIPT_REMOVE -->
+        <script type="text/javascript" src="../src/jpx.js"></script>  <!-- PDFJSSCRIPT_REMOVE -->
         <script type="text/javascript">PDFJS.workerSrc = '../src/worker_loader.js';</script> <!-- PDFJSSCRIPT_REMOVE -->
         <script type="text/javascript" src="viewer.js"></script>
 

web/viewer.js

@@ -6,6 +6,7 @@
 var kDefaultURL = 'compressed.tracemonkey-pldi-09.pdf';
 var kDefaultScale = 'auto';
 var kDefaultScaleDelta = 1.1;
+var kUnknownScale = 0;
 var kCacheSize = 20;
 var kCssUnits = 96.0 / 72.0;
 var kScrollbarPadding = 40;
@@ -157,7 +158,7 @@ var currentPageNumber = 1;
 var PDFView = {
   pages: [],
   thumbnails: [],
-  currentScale: 0,
+  currentScale: kUnknownScale,
   currentScaleValue: null,
   initialBookmark: document.location.hash.substring(1),
 
@@ -212,12 +213,12 @@ var PDFView = {
 
   zoomIn: function pdfViewZoomIn() {
     var newScale = Math.min(kMaxScale, this.currentScale * kDefaultScaleDelta);
-    this.setScale(newScale, true);
+    this.parseScale(newScale, true);
   },
 
   zoomOut: function pdfViewZoomOut() {
     var newScale = Math.max(kMinScale, this.currentScale / kDefaultScaleDelta);
-    this.setScale(newScale, true);
+    this.parseScale(newScale, true);
   },
 
   set page(val) {
@@ -478,10 +479,16 @@ var PDFView = {
     }
     else if (storedHash)
       this.setHash(storedHash);
-    else {
-      this.parseScale(scale || kDefaultScale, true);
+    else if (scale) {
+      this.parseScale(scale, true);
       this.page = 1;
     }
+
+    if (PDFView.currentScale === kUnknownScale) {
+      // Scale was not initialized: invalid bookmark or scale was not specified.
+      // Setting the default one.
+      this.parseScale(kDefaultScale, true);
+    }
   },
 
   setHash: function pdfViewSetHash(hash) {
@@ -776,6 +783,8 @@ var PageView = function pageView(container, content, id, pageWidth, pageHeight,
 
       if (scale && scale !== PDFView.currentScale)
         PDFView.parseScale(scale, true);
+      else if (PDFView.currentScale === kUnknownScale)
+        PDFView.parseScale(kDefaultScale, true);
 
       setTimeout(function pageViewScrollIntoViewRelayout() {
         // letting page to re-layout before scrolling
@@ -994,22 +1003,55 @@ var TextLayerBuilder = function textLayerBuilder(textLayerDiv) {
     var self = this;
     var textDivs = this.textDivs;
     var textLayerDiv = this.textLayerDiv;
-    this.textLayerTimer = setInterval(function renderTextLayer() {
+    var renderTimer = null;
+    var renderingDone = false;
+    var renderInterval = 0;
+    var resumeInterval = 500; // in ms
+
+    // Render the text layer, one div at a time
+    function renderTextLayer() {
       if (textDivs.length === 0) {
-        clearInterval(self.textLayerTimer);
+        clearInterval(renderTimer);
+        renderingDone = true;
         return;
       }
       var textDiv = textDivs.shift();
-      if (textDiv.dataset.textLength >= 1) { // avoid div by zero
+      if (textDiv.dataset.textLength > 0) {
         textLayerDiv.appendChild(textDiv);
+
+        if (textDiv.dataset.textLength > 1) { // avoid div by zero
           // Adjust div width (via letterSpacing) to match canvas text
           // Due to the .offsetWidth calls, this is slow
+          // This needs to come after appending to the DOM
           textDiv.style.letterSpacing =
             ((textDiv.dataset.canvasWidth - textDiv.offsetWidth) /
               (textDiv.dataset.textLength - 1)) + 'px';
         }
-    }, 0);
-  };
+      } // textLength > 0
+    }
+    renderTimer = setInterval(renderTextLayer, renderInterval);
+
+    // Stop rendering when user scrolls. Resume after XXX milliseconds
+    // of no scroll events
+    var scrollTimer = null;
+    function textLayerOnScroll() {
+      if (renderingDone) {
+        window.removeEventListener('scroll', textLayerOnScroll, false);
+        return;
+      }
+
+      // Immediately pause rendering
+      clearInterval(renderTimer);
+
+      clearTimeout(scrollTimer);
+      scrollTimer = setTimeout(function textLayerScrollTimer() {
+        // Resume rendering
+        renderTimer = setInterval(renderTextLayer, renderInterval);
+      }, resumeInterval);
+    }; // textLayerOnScroll
+
+    window.addEventListener('scroll', textLayerOnScroll, false);
+  }; // endLayout
 
   this.appendText = function textLayerBuilderAppendText(text,
                                                         fontName, fontSize) {
@@ -1274,7 +1316,7 @@ window.addEventListener('keydown', function keydown(evt) {
       handled = true;
       break;
     case 48: // '0'
-      PDFView.setScale(kDefaultScale, true);
+      PDFView.parseScale(kDefaultScale, true);
       handled = true;
       break;
     case 37: // left arrow