Split files into worker and main thread pieces.

src/display/font_loader.js

@@ -0,0 +1,311 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* globals PDFJS, shadow, isWorker, assert, warn, FontRendererFactory,
+           bytesToString, globalScope */
+
+'use strict';
+
+PDFJS.disableFontFace = false;
+
+var FontLoader = {
+  insertRule: function fontLoaderInsertRule(rule) {
+    var styleElement = document.getElementById('PDFJS_FONT_STYLE_TAG');
+    if (!styleElement) {
+        styleElement = document.createElement('style');
+        styleElement.id = 'PDFJS_FONT_STYLE_TAG';
+        document.documentElement.getElementsByTagName('head')[0].appendChild(
+          styleElement);
+    }
+
+    var styleSheet = styleElement.sheet;
+    styleSheet.insertRule(rule, styleSheet.cssRules.length);
+  },
+//#if !(MOZCENTRAL)
+  get loadTestFont() {
+    // This is a CFF font with 1 glyph for '.' that fills its entire width and
+    // height.
+    return shadow(this, 'loadTestFont', atob(
+      'T1RUTwALAIAAAwAwQ0ZGIDHtZg4AAAOYAAAAgUZGVE1lkzZwAAAEHAAAABxHREVGABQAFQ' +
+      'AABDgAAAAeT1MvMlYNYwkAAAEgAAAAYGNtYXABDQLUAAACNAAAAUJoZWFk/xVFDQAAALwA' +
+      'AAA2aGhlYQdkA+oAAAD0AAAAJGhtdHgD6AAAAAAEWAAAAAZtYXhwAAJQAAAAARgAAAAGbm' +
+      'FtZVjmdH4AAAGAAAAAsXBvc3T/hgAzAAADeAAAACAAAQAAAAEAALZRFsRfDzz1AAsD6AAA' +
+      'AADOBOTLAAAAAM4KHDwAAAAAA+gDIQAAAAgAAgAAAAAAAAABAAADIQAAAFoD6AAAAAAD6A' +
+      'ABAAAAAAAAAAAAAAAAAAAAAQAAUAAAAgAAAAQD6AH0AAUAAAKKArwAAACMAooCvAAAAeAA' +
+      'MQECAAACAAYJAAAAAAAAAAAAAQAAAAAAAAAAAAAAAFBmRWQAwAAuAC4DIP84AFoDIQAAAA' +
+      'AAAQAAAAAAAAAAACAAIAABAAAADgCuAAEAAAAAAAAAAQAAAAEAAAAAAAEAAQAAAAEAAAAA' +
+      'AAIAAQAAAAEAAAAAAAMAAQAAAAEAAAAAAAQAAQAAAAEAAAAAAAUAAQAAAAEAAAAAAAYAAQ' +
+      'AAAAMAAQQJAAAAAgABAAMAAQQJAAEAAgABAAMAAQQJAAIAAgABAAMAAQQJAAMAAgABAAMA' +
+      'AQQJAAQAAgABAAMAAQQJAAUAAgABAAMAAQQJAAYAAgABWABYAAAAAAAAAwAAAAMAAAAcAA' +
+      'EAAAAAADwAAwABAAAAHAAEACAAAAAEAAQAAQAAAC7//wAAAC7////TAAEAAAAAAAABBgAA' +
+      'AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAEAAAAAAA' +
+      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA' +
+      'AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMAAA' +
+      'AAAAD/gwAyAAAAAQAAAAAAAAAAAAAAAAAAAAABAAQEAAEBAQJYAAEBASH4DwD4GwHEAvgc' +
+      'A/gXBIwMAYuL+nz5tQXkD5j3CBLnEQACAQEBIVhYWFhYWFhYWFhYWFhYWFhYWFhYWFhYWF' +
+      'hYWFhYWFhYAAABAQAADwACAQEEE/t3Dov6fAH6fAT+fPp8+nwHDosMCvm1Cvm1DAz6fBQA' +
+      'AAAAAAABAAAAAMmJbzEAAAAAzgTjFQAAAADOBOQpAAEAAAAAAAAADAAUAAQAAAABAAAAAg' +
+      'ABAAAAAAAAAAAD6AAAAAAAAA=='
+    ));
+  },
+
+  loadTestFontId: 0,
+
+  loadingContext: {
+    requests: [],
+    nextRequestId: 0
+  },
+
+  isSyncFontLoadingSupported: (function detectSyncFontLoadingSupport() {
+    if (isWorker)
+      return false;
+
+    // User agent string sniffing is bad, but there is no reliable way to tell
+    // if font is fully loaded and ready to be used with canvas.
+    var userAgent = window.navigator.userAgent;
+    var m = /Mozilla\/5.0.*?rv:(\d+).*? Gecko/.exec(userAgent);
+    if (m && m[1] >= 14)
+      return true;
+    // TODO other browsers
+    return false;
+  })(),
+
+  bind: function fontLoaderBind(fonts, callback) {
+    assert(!isWorker, 'bind() shall be called from main thread');
+
+    var rules = [], fontsToLoad = [];
+    for (var i = 0, ii = fonts.length; i < ii; i++) {
+      var font = fonts[i];
+
+      // Add the font to the DOM only once or skip if the font
+      // is already loaded.
+      if (font.attached || font.loading === false) {
+        continue;
+      }
+      font.attached = true;
+
+      var rule = font.bindDOM();
+      if (rule) {
+        rules.push(rule);
+        fontsToLoad.push(font);
+      }
+    }
+
+    var request = FontLoader.queueLoadingCallback(callback);
+    if (rules.length > 0 && !this.isSyncFontLoadingSupported) {
+      FontLoader.prepareFontLoadEvent(rules, fontsToLoad, request);
+    } else {
+      request.complete();
+    }
+  },
+
+  queueLoadingCallback: function FontLoader_queueLoadingCallback(callback) {
+    function LoadLoader_completeRequest() {
+      assert(!request.end, 'completeRequest() cannot be called twice');
+      request.end = Date.now();
+
+      // sending all completed requests in order how they were queued
+      while (context.requests.length > 0 && context.requests[0].end) {
+        var otherRequest = context.requests.shift();
+        setTimeout(otherRequest.callback, 0);
+      }
+    }
+
+    var context = FontLoader.loadingContext;
+    var requestId = 'pdfjs-font-loading-' + (context.nextRequestId++);
+    var request = {
+      id: requestId,
+      complete: LoadLoader_completeRequest,
+      callback: callback,
+      started: Date.now()
+    };
+    context.requests.push(request);
+    return request;
+  },
+
+  prepareFontLoadEvent: function fontLoaderPrepareFontLoadEvent(rules,
+                                                                fonts,
+                                                                request) {
+      /** Hack begin */
+      // There's currently no event when a font has finished downloading so the
+      // following code is a dirty hack to 'guess' when a font is
+      // ready. It's assumed fonts are loaded in order, so add a known test
+      // font after the desired fonts and then test for the loading of that
+      // test font.
+
+      function int32(data, offset) {
+        return (data.charCodeAt(offset) << 24) |
+               (data.charCodeAt(offset + 1) << 16) |
+               (data.charCodeAt(offset + 2) << 8) |
+               (data.charCodeAt(offset + 3) & 0xff);
+      }
+
+      function string32(value) {
+        return String.fromCharCode((value >> 24) & 0xff) +
+               String.fromCharCode((value >> 16) & 0xff) +
+               String.fromCharCode((value >> 8) & 0xff) +
+               String.fromCharCode(value & 0xff);
+      }
+
+      function spliceString(s, offset, remove, insert) {
+        var chunk1 = data.substr(0, offset);
+        var chunk2 = data.substr(offset + remove);
+        return chunk1 + insert + chunk2;
+      }
+
+      var i, ii;
+
+      var canvas = document.createElement('canvas');
+      canvas.width = 1;
+      canvas.height = 1;
+      var ctx = canvas.getContext('2d');
+
+      var called = 0;
+      function isFontReady(name, callback) {
+        called++;
+        // With setTimeout clamping this gives the font ~100ms to load.
+        if(called > 30) {
+          warn('Load test font never loaded.');
+          callback();
+          return;
+        }
+        ctx.font = '30px ' + name;
+        ctx.fillText('.', 0, 20);
+        var imageData = ctx.getImageData(0, 0, 1, 1);
+        if (imageData.data[3] > 0) {
+          callback();
+          return;
+        }
+        setTimeout(isFontReady.bind(null, name, callback));
+      }
+
+      var loadTestFontId = 'lt' + Date.now() + this.loadTestFontId++;
+      // Chromium seems to cache fonts based on a hash of the actual font data,
+      // so the font must be modified for each load test else it will appear to
+      // be loaded already.
+      // TODO: This could maybe be made faster by avoiding the btoa of the full
+      // font by splitting it in chunks before hand and padding the font id.
+      var data = this.loadTestFont;
+      var COMMENT_OFFSET = 976; // has to be on 4 byte boundary (for checksum)
+      data = spliceString(data, COMMENT_OFFSET, loadTestFontId.length,
+                          loadTestFontId);
+      // CFF checksum is important for IE, adjusting it
+      var CFF_CHECKSUM_OFFSET = 16;
+      var XXXX_VALUE = 0x58585858; // the "comment" filled with 'X'
+      var checksum = int32(data, CFF_CHECKSUM_OFFSET);
+      for (i = 0, ii = loadTestFontId.length - 3; i < ii; i += 4) {
+        checksum = (checksum - XXXX_VALUE + int32(loadTestFontId, i)) | 0;
+      }
+      if (i < loadTestFontId.length) { // align to 4 bytes boundary
+        checksum = (checksum - XXXX_VALUE +
+                    int32(loadTestFontId + 'XXX', i)) | 0;
+      }
+      data = spliceString(data, CFF_CHECKSUM_OFFSET, 4, string32(checksum));
+
+      var url = 'url(data:font/opentype;base64,' + btoa(data) + ');';
+      var rule = '@font-face { font-family:"' + loadTestFontId + '";src:' +
+                 url + '}';
+      FontLoader.insertRule(rule);
+
+      var names = [];
+      for (i = 0, ii = fonts.length; i < ii; i++) {
+        names.push(fonts[i].loadedName);
+      }
+      names.push(loadTestFontId);
+
+      var div = document.createElement('div');
+      div.setAttribute('style',
+                       'visibility: hidden;' +
+                       'width: 10px; height: 10px;' +
+                       'position: absolute; top: 0px; left: 0px;');
+      for (i = 0, ii = names.length; i < ii; ++i) {
+        var span = document.createElement('span');
+        span.textContent = 'Hi';
+        span.style.fontFamily = names[i];
+        div.appendChild(span);
+      }
+      document.body.appendChild(div);
+
+      isFontReady(loadTestFontId, function() {
+        document.body.removeChild(div);
+        request.complete();
+      });
+      /** Hack end */
+  }
+//#else
+//bind: function fontLoaderBind(fonts, callback) {
+//  assert(!isWorker, 'bind() shall be called from main thread');
+//
+//  for (var i = 0, ii = fonts.length; i < ii; i++) {
+//    var font = fonts[i];
+//    if (font.attached)
+//      continue;
+//
+//    font.attached = true;
+//    font.bindDOM()
+//  }
+//
+//  setTimeout(callback);
+//}
+//#endif
+};
+
+var FontFace = (function FontFaceClosure() {
+  function FontFace(name, file, properties) {
+    if (arguments.length === 1) {
+      // importing translated data
+      var data = arguments[0];
+      for (var i in data) {
+        this[i] = data[i];
+      }
+      return;
+    }
+  }
+  FontFace.prototype = {
+    get renderer() {
+      var renderer = FontRendererFactory.create(this);
+      return shadow(this, 'renderer', renderer);
+    },
+    bindDOM: function FontFace_bindDOM() {
+      if (!this.data)
+        return null;
+
+      if (PDFJS.disableFontFace) {
+        this.disableFontFace = true;
+        return null;
+      }
+
+      var data = bytesToString(this.data);
+      var fontName = this.loadedName;
+
+      // Add the font-face rule to the document
+      var url = ('url(data:' + this.mimetype + ';base64,' +
+                 window.btoa(data) + ');');
+      var rule = '@font-face { font-family:"' + fontName + '";src:' + url + '}';
+
+      FontLoader.insertRule(rule);
+
+      if (PDFJS.pdfBug && 'FontInspector' in globalScope &&
+          globalScope['FontInspector'].enabled)
+        globalScope['FontInspector'].fontAdded(this, url);
+
+      return rule;
+    }
+  };
+  return FontFace;
+})();

src/display/font_renderer.js

@@ -0,0 +1,711 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* globals error, Stream, GlyphsUnicode, CFFParser, Encodings */
+
+'use strict';
+
+var FontRendererFactory = (function FontRendererFactoryClosure() {
+  function getLong(data, offset) {
+    return (data[offset] << 24) | (data[offset + 1] << 16) |
+           (data[offset + 2] << 8) | data[offset + 3];
+  }
+
+  function getUshort(data, offset) {
+    return (data[offset] << 8) | data[offset + 1];
+  }
+
+  function parseCmap(data, start, end) {
+    var offset = getUshort(data, start + 2) === 1 ? getLong(data, start + 8) :
+                                                    getLong(data, start + 16);
+    var format = getUshort(data, start + offset);
+    if (format === 4) {
+      var length = getUshort(data, start + offset + 2);
+      var segCount = getUshort(data, start + offset + 6) >> 1;
+      var p = start + offset + 14;
+      var ranges = [];
+      for (var i = 0; i < segCount; i++, p += 2) {
+        ranges[i] = {end: getUshort(data, p)};
+      }
+      p += 2;
+      for (var i = 0; i < segCount; i++, p += 2) {
+        ranges[i].start = getUshort(data, p);
+      }
+      for (var i = 0; i < segCount; i++, p += 2) {
+        ranges[i].idDelta = getUshort(data, p);
+      }
+      for (var i = 0; i < segCount; i++, p += 2) {
+        var idOffset = getUshort(data, p);
+        if (idOffset === 0) {
+          continue;
+        }
+        ranges[i].ids = [];
+        for (var j = 0, jj = ranges[i].end - ranges[i].start + 1; j < jj; j++) {
+          ranges[i].ids[j] = getUshort(data, p + idOffset);
+          idOffset += 2;
+        }
+      }
+      return ranges;
+    } else if (format === 12) {
+      var length = getLong(data, start + offset + 4);
+      var groups = getLong(data, start + offset + 12);
+      var p = start + offset + 16;
+      var ranges = [];
+      for (var i = 0; i < groups; i++) {
+        ranges.push({
+          start: getLong(data, p),
+          end: getLong(data, p + 4),
+          idDelta: getLong(data, p + 8) - getLong(data, p)
+        });
+        p += 12;
+      }
+      return ranges;
+    }
+    error('not supported cmap: ' + format);
+  }
+
+  function parseCff(data, start, end) {
+    var properties = {};
+    var parser = new CFFParser(
+      new Stream(data, start, end - start), properties);
+    var cff = parser.parse();
+    return {
+      glyphs: cff.charStrings.objects,
+      subrs: cff.topDict.privateDict && cff.topDict.privateDict.subrsIndex &&
+             cff.topDict.privateDict.subrsIndex.objects,
+      gsubrs: cff.globalSubrIndex && cff.globalSubrIndex.objects
+    };
+  }
+
+  function parseGlyfTable(glyf, loca, isGlyphLocationsLong) {
+    var itemSize, itemDecode;
+    if (isGlyphLocationsLong) {
+      itemSize = 4;
+      itemDecode = function fontItemDecodeLong(data, offset) {
+        return (data[offset] << 24) | (data[offset + 1] << 16) |
+               (data[offset + 2] << 8) | data[offset + 3];
+      };
+    } else {
+      itemSize = 2;
+      itemDecode = function fontItemDecode(data, offset) {
+        return (data[offset] << 9) | (data[offset + 1] << 1);
+      };
+    }
+    var glyphs = [];
+    var startOffset = itemDecode(loca, 0);
+    for (var j = itemSize; j < loca.length; j += itemSize) {
+      var endOffset = itemDecode(loca, j);
+      glyphs.push(glyf.subarray(startOffset, endOffset));
+      startOffset = endOffset;
+    }
+    return glyphs;
+  }
+
+  function lookupCmap(ranges, unicode) {
+    var code = unicode.charCodeAt(0);
+    var l = 0, r = ranges.length - 1;
+    while (l < r) {
+      var c = (l + r + 1) >> 1;
+      if (code < ranges[c].start) {
+        r = c - 1;
+      } else {
+        l = c;
+      }
+    }
+    if (ranges[l].start <= code && code <= ranges[l].end) {
+      return (ranges[l].idDelta + (ranges[l].ids ?
+        ranges[l].ids[code - ranges[l].start] : code)) & 0xFFFF;
+    }
+    return 0;
+  }
+
+  function compileGlyf(code, js, font) {
+    function moveTo(x, y) {
+      js.push('c.moveTo(' + x + ',' + y + ');');
+    }
+    function lineTo(x, y) {
+      js.push('c.lineTo(' + x + ',' + y + ');');
+    }
+    function quadraticCurveTo(xa, ya, x, y) {
+      js.push('c.quadraticCurveTo(' + xa + ',' + ya + ',' +
+                                   x + ',' + y + ');');
+    }
+
+    var i = 0;
+    var numberOfContours = ((code[i] << 24) | (code[i + 1] << 16)) >> 16;
+    var xMin = ((code[i + 2] << 24) | (code[i + 3] << 16)) >> 16;
+    var yMin = ((code[i + 4] << 24) | (code[i + 5] << 16)) >> 16;
+    var xMax = ((code[i + 6] << 24) | (code[i + 7] << 16)) >> 16;
+    var yMax = ((code[i + 8] << 24) | (code[i + 9] << 16)) >> 16;
+    i += 10;
+    if (numberOfContours < 0) {
+      // composite glyph
+      var x = 0, y = 0;
+      do {
+        var flags = (code[i] << 8) | code[i + 1];
+        var glyphIndex = (code[i + 2] << 8) | code[i + 3];
+        i += 4;
+        var arg1, arg2;
+        if ((flags & 0x01)) {
+          arg1 = ((code[i] << 24) | (code[i + 1] << 16)) >> 16;
+          arg2 = ((code[i + 2] << 24) | (code[i + 3] << 16)) >> 16;
+          i += 4;
+        } else {
+          arg1 = code[i++]; arg2 = code[i++];
+        }
+        if ((flags & 0x02)) {
+           x = arg1;
+           y = arg2;
+        } else {
+           x = 0; y = 0; // TODO "they are points" ?
+        }
+        var scaleX = 1, scaleY = 1, scale01 = 0, scale10 = 0;
+        if ((flags & 0x08)) {
+          scaleX =
+          scaleY = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824;
+          i += 2;
+        } else if ((flags & 0x40)) {
+          scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824;
+          scaleY = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824;
+          i += 4;
+        } else if ((flags & 0x80)) {
+          scaleX = ((code[i] << 24) | (code[i + 1] << 16)) / 1073741824;
+          scale01 = ((code[i + 2] << 24) | (code[i + 3] << 16)) / 1073741824;
+          scale10 = ((code[i + 4] << 24) | (code[i + 5] << 16)) / 1073741824;
+          scaleY = ((code[i + 6] << 24) | (code[i + 7] << 16)) / 1073741824;
+          i += 8;
+        }
+        var subglyph = font.glyphs[glyphIndex];
+        if (subglyph) {
+          js.push('c.save();');
+          js.push('c.transform(' + scaleX + ',' + scale01 + ',' +
+                  scale10 + ',' + scaleY + ',' + x + ',' + y + ');');
+          compileGlyf(subglyph, js, font);
+          js.push('c.restore();');
+        }
+      } while ((flags & 0x20));
+    } else {
+      // simple glyph
+      var endPtsOfContours = [];
+      for (var j = 0; j < numberOfContours; j++) {
+        endPtsOfContours.push((code[i] << 8) | code[i + 1]);
+        i += 2;
+      }
+      var instructionLength = (code[i] << 8) | code[i + 1];
+      i += 2 + instructionLength; // skipping the instructions
+      var numberOfPoints = endPtsOfContours[endPtsOfContours.length - 1] + 1;
+      var points = [];
+      while (points.length < numberOfPoints) {
+        var flags = code[i++], repeat = 1;
+        if ((flags & 0x08)) {
+          repeat += code[i++];
+        }
+        while (repeat-- > 0) {
+          points.push({flags: flags});
+        }
+      }
+      var x = 0, y = 0;
+      for (var j = 0; j < numberOfPoints; j++) {
+        switch (points[j].flags & 0x12) {
+          case 0x00:
+            x += ((code[i] << 24) | (code[i + 1] << 16)) >> 16;
+            i += 2;
+            break;
+          case 0x02:
+            x -= code[i++];
+            break;
+          case 0x12:
+            x += code[i++];
+            break;
+        }
+        points[j].x = x;
+      }
+      for (var j = 0; j < numberOfPoints; j++) {
+        switch (points[j].flags & 0x24) {
+          case 0x00:
+            y += ((code[i] << 24) | (code[i + 1] << 16)) >> 16;
+            i += 2;
+            break;
+          case 0x04:
+            y -= code[i++];
+            break;
+          case 0x24:
+            y += code[i++];
+            break;
+        }
+        points[j].y = y;
+      }
+
+      var startPoint = 0;
+      for (var i = 0; i < numberOfContours; i++) {
+        var endPoint = endPtsOfContours[i];
+        // contours might have implicit points, which is located in the middle
+        // between two neighboring off-curve points
+        var contour = points.slice(startPoint, endPoint + 1);
+        if ((contour[0].flags & 1)) {
+          contour.push(contour[0]); // using start point at the contour end
+        } else if ((contour[contour.length - 1].flags & 1)) {
+          // first is off-curve point, trying to use one from the end
+          contour.unshift(contour[contour.length - 1]);
+        } else {
+          // start and end are off-curve points, creating implicit one
+          var p = {
+            flags: 1,
+            x: (contour[0].x + contour[contour.length - 1].x) / 2,
+            y: (contour[0].y + contour[contour.length - 1].y) / 2
+          };
+          contour.unshift(p);
+          contour.push(p);
+        }
+        moveTo(contour[0].x, contour[0].y);
+        for (var j = 1, jj = contour.length; j < jj; j++) {
+          if ((contour[j].flags & 1)) {
+            lineTo(contour[j].x, contour[j].y);
+          } else if ((contour[j + 1].flags & 1)){
+            quadraticCurveTo(contour[j].x, contour[j].y,
+                             contour[j + 1].x, contour[j + 1].y);
+            j++;
+          } else {
+            quadraticCurveTo(contour[j].x, contour[j].y,
+              (contour[j].x + contour[j + 1].x) / 2,
+              (contour[j].y + contour[j + 1].y) / 2);
+          }
+        }
+        startPoint = endPoint + 1;
+      }
+    }
+  }
+
+  function compileCharString(code, js, font) {
+    var stack = [];
+    var x = 0, y = 0;
+    var stems = 0;
+
+    function moveTo(x, y) {
+      js.push('c.moveTo(' + x + ',' + y + ');');
+    }
+    function lineTo(x, y) {
+      js.push('c.lineTo(' + x + ',' + y + ');');
+    }
+    function bezierCurveTo(x1, y1, x2, y2, x, y) {
+      js.push('c.bezierCurveTo(' + x1 + ',' + y1 + ',' + x2 + ',' + y2 + ',' +
+                                   x + ',' + y + ');');
+    }
+
+    function parse(code) {
+      var i = 0;
+      while (i < code.length) {
+        var stackClean = false;
+        var v = code[i++];
+        switch (v) {
+          case 1: // hstem
+            stems += stack.length >> 1;
+            stackClean = true;
+            break;
+          case 3: // vstem
+            stems += stack.length >> 1;
+            stackClean = true;
+            break;
+          case 4: // vmoveto
+            y += stack.pop();
+            moveTo(x, y);
+            stackClean = true;
+            break;
+          case 5: // rlineto
+            while (stack.length > 0) {
+              x += stack.shift();
+              y += stack.shift();
+              lineTo(x, y);
+            }
+            break;
+          case 6: // hlineto
+            while (stack.length > 0) {
+              x += stack.shift();
+              lineTo(x, y);
+              if (stack.length === 0) {
+                break;
+              }
+              y += stack.shift();
+              lineTo(x, y);
+            }
+            break;
+          case 7: // vlineto
+            while (stack.length > 0) {
+              y += stack.shift();
+              lineTo(x, y);
+              if (stack.length === 0) {
+                break;
+              }
+              x += stack.shift();
+              lineTo(x, y);
+            }
+            break;
+          case 8: // rrcurveto
+            while (stack.length > 0) {
+              var xa = x + stack.shift(), ya = y + stack.shift();
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb + stack.shift(); y = yb + stack.shift();
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            break;
+          case 10: // callsubr
+            var n = stack.pop() + font.subrsBias;
+            var subrCode = font.subrs[n];
+            if (subrCode) {
+              parse(subrCode);
+            }
+            break;
+          case 11: // return
+            return;
+          case 12:
+            v = code[i++];
+            switch (v) {
+              case 34: // flex
+                var xa = x + stack.shift();
+                var xb = xa + stack.shift(), y1 = y + stack.shift();
+                x = xb + stack.shift();
+                bezierCurveTo(xa, y, xb, y1, x, y1);
+                var xa = x + stack.shift();
+                var xb = xa + stack.shift();
+                x = xb + stack.shift();
+                bezierCurveTo(xa, y1, xb, y, x, y);
+                break;
+              case 35: // flex
+                var xa = x + stack.shift(), ya = y + stack.shift();
+                var xb = xa + stack.shift(), yb = ya + stack.shift();
+                x = xb + stack.shift(); y = yb + stack.shift();
+                bezierCurveTo(xa, ya, xb, yb, x, y);
+                var xa = x + stack.shift(), ya = y + stack.shift();
+                var xb = xa + stack.shift(), yb = ya + stack.shift();
+                x = xb + stack.shift(); y = yb + stack.shift();
+                bezierCurveTo(xa, ya, xb, yb, x, y);
+                stack.pop(); // fd
+                break;
+              case 36: // hflex1
+                var xa = x + stack.shift(), y1 = y + stack.shift();
+                var xb = xa + stack.shift(), y2 = y1 + stack.shift();
+                x = xb + stack.shift();
+                bezierCurveTo(xa, y1, xb, y2, x, y2);
+                var xa = x + stack.shift();
+                var xb = xa + stack.shift(), y3 = y2 + stack.shift();
+                x = xb + stack.shift();
+                bezierCurveTo(xa, y2, xb, y3, x, y);
+                break;
+              case 37: // flex1
+                var x0 = x, y0 = y;
+                var xa = x + stack.shift(), ya = y + stack.shift();
+                var xb = xa + stack.shift(), yb = ya + stack.shift();
+                x = xb + stack.shift(); y = yb + stack.shift();
+                bezierCurveTo(xa, ya, xb, yb, x, y);
+                var xa = x + stack.shift(), ya = y + stack.shift();
+                var xb = xa + stack.shift(), yb = ya + stack.shift();
+                x = xb; y = yb;
+                if (Math.abs(x - x0) > Math.abs(y - y0))
+                  x += stack.shift();
+                else
+                  y += stack.shift();
+                bezierCurveTo(xa, ya, xb, yb, x, y);
+                break;
+              default:
+                error('unknown operator: 12 ' + v);
+            }
+            break;
+          case 14: // endchar
+            if (stack.length >= 4) {
+              var achar = stack.pop();
+              var bchar = stack.pop();
+              y = stack.pop();
+              x = stack.pop();
+              js.push('c.save();');
+              js.push('c.translate('+ x + ',' + y + ');');
+              var gid = lookupCmap(font.cmap, String.fromCharCode(
+                font.glyphNameMap[Encodings.StandardEncoding[achar]]));
+              compileCharString(font.glyphs[gid], js, font);
+              js.push('c.restore();');
+
+              gid = lookupCmap(font.cmap, String.fromCharCode(
+                font.glyphNameMap[Encodings.StandardEncoding[bchar]]));
+              compileCharString(font.glyphs[gid], js, font);
+            }
+            return;
+          case 18: // hstemhm
+            stems += stack.length >> 1;
+            stackClean = true;
+            break;
+          case 19: // hintmask
+            stems += stack.length >> 1;
+            i += (stems + 7) >> 3;
+            stackClean = true;
+            break;
+          case 20: // cntrmask
+            stems += stack.length >> 1;
+            i += (stems + 7) >> 3;
+            stackClean = true;
+            break;
+          case 21: // rmoveto
+            y += stack.pop();
+            x += stack.pop();
+            moveTo(x, y);
+            stackClean = true;
+            break;
+          case 22: // hmoveto
+            x += stack.pop();
+            moveTo(x, y);
+            stackClean = true;
+            break;
+          case 23: // vstemhm
+            stems += stack.length >> 1;
+            stackClean = true;
+            break;
+          case 24: // rcurveline
+            while (stack.length > 2) {
+              var xa = x + stack.shift(), ya = y + stack.shift();
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb + stack.shift(); y = yb + stack.shift();
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            x += stack.shift();
+            y += stack.shift();
+            lineTo(x, y);
+            break;
+          case 25: // rlinecurve
+            while (stack.length > 6) {
+              x += stack.shift();
+              y += stack.shift();
+              lineTo(x, y);
+            }
+            var xa = x + stack.shift(), ya = y + stack.shift();
+            var xb = xa + stack.shift(), yb = ya + stack.shift();
+            x = xb + stack.shift(); y = yb + stack.shift();
+            bezierCurveTo(xa, ya, xb, yb, x, y);
+            break;
+          case 26: // vvcurveto
+            if (stack.length % 2) {
+              x += stack.shift();
+            }
+            while (stack.length > 0) {
+              var xa = x, ya = y + stack.shift();
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb; y = yb + stack.shift();
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            break;
+          case 27: // hhcurveto
+            if (stack.length % 2) {
+              y += stack.shift();
+            }
+            while (stack.length > 0) {
+              var xa = x + stack.shift(), ya = y;
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb + stack.shift(); y = yb;
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            break;
+          case 28:
+            stack.push(((code[i] << 24) | (code[i + 1] << 16)) >> 16);
+            i += 2;
+            break;
+          case 29: // callgsubr
+            var n = stack.pop() + font.gsubrsBias;
+            var subrCode = font.gsubrs[n];
+            if (subrCode) {
+              parse(subrCode);
+            }
+            break;
+          case 30: // vhcurveto
+            while (stack.length > 0) {
+              var xa = x, ya = y + stack.shift();
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb + stack.shift();
+              y = yb + (stack.length === 1 ? stack.shift() : 0);
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+              if (stack.length === 0) {
+                break;
+              }
+
+              var xa = x + stack.shift(), ya = y;
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              y = yb + stack.shift();
+              x = xb + (stack.length === 1 ? stack.shift() : 0);
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            break;
+          case 31: // hvcurveto
+            while (stack.length > 0) {
+              var xa = x + stack.shift(), ya = y;
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              y = yb + stack.shift();
+              x = xb + (stack.length === 1 ? stack.shift() : 0);
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+              if (stack.length === 0) {
+                break;
+              }
+
+              var xa = x, ya = y + stack.shift();
+              var xb = xa + stack.shift(), yb = ya + stack.shift();
+              x = xb + stack.shift();
+              y = yb + (stack.length === 1 ? stack.shift() : 0);
+              bezierCurveTo(xa, ya, xb, yb, x, y);
+            }
+            break;
+          default:
+            if (v < 32)
+              error('unknown operator: ' + v);
+            if (v < 247)
+              stack.push(v - 139);
+            else if (v < 251)
+              stack.push((v - 247) * 256 + code[i++] + 108);
+            else if (v < 255)
+              stack.push(-(v - 251) * 256 - code[i++] - 108);
+            else {
+              stack.push(((code[i] << 24) | (code[i + 1] << 16) |
+                         (code[i + 2] << 8) | code[i + 3]) / 65536);
+              i += 4;
+            }
+            break;
+        }
+        if (stackClean) {
+          stack.length = 0;
+        }
+      }
+    }
+    parse(code);
+  }
+
+  function TrueTypeCompiled(glyphs, cmap, fontMatrix) {
+    this.glyphs = glyphs;
+    this.cmap = cmap;
+    this.fontMatrix = fontMatrix || [0.000488, 0, 0, 0.000488, 0, 0];
+
+    this.compiledGlyphs = [];
+  }
+
+  var noop = function () {};
+
+  TrueTypeCompiled.prototype = {
+    getPathGenerator: function (unicode) {
+      var gid = lookupCmap(this.cmap, unicode);
+      var fn = this.compiledGlyphs[gid];
+      if (!fn) {
+        this.compiledGlyphs[gid] = fn = this.compileGlyph(this.glyphs[gid]);
+      }
+      return fn;
+    },
+    compileGlyph: function (code) {
+      if (!code || code.length === 0 || code[0] === 14) {
+        return noop;
+      }
+
+      var js = [];
+      js.push('c.save();');
+      js.push('c.transform(' + this.fontMatrix.join(',') + ');');
+      js.push('c.scale(size, -size);');
+
+      var stack = [], x = 0, y = 0;
+      compileGlyf(code, js, this);
+
+      js.push('c.restore();');
+
+      /*jshint -W054 */
+      return new Function('c', 'size', js.join('\n'));
+    }
+  };
+
+  function Type2Compiled(cffInfo, cmap, fontMatrix, glyphNameMap) {
+    this.glyphs = cffInfo.glyphs;
+    this.gsubrs = cffInfo.gsubrs || [];
+    this.subrs = cffInfo.subrs || [];
+    this.cmap = cmap;
+    this.glyphNameMap = glyphNameMap || GlyphsUnicode;
+    this.fontMatrix = fontMatrix || [0.001, 0, 0, 0.001, 0, 0];
+
+    this.compiledGlyphs = [];
+    this.gsubrsBias = this.gsubrs.length < 1240 ? 107 :
+                      this.gsubrs.length < 33900 ? 1131 : 32768;
+    this.subrsBias = this.subrs.length < 1240 ? 107 :
+                     this.subrs.length < 33900 ? 1131 : 32768;
+  }
+
+  Type2Compiled.prototype = {
+    getPathGenerator: function (unicode) {
+      var gid = lookupCmap(this.cmap, unicode);
+      var fn = this.compiledGlyphs[gid];
+      if (!fn) {
+        this.compiledGlyphs[gid] = fn = this.compileGlyph(this.glyphs[gid]);
+      }
+      return fn;
+    },
+    compileGlyph: function (code) {
+      if (!code || code.length === 0 || code[0] === 14) {
+        return noop;
+      }
+
+      var js = [];
+      js.push('c.save();');
+      js.push('c.transform(' + this.fontMatrix.join(',') + ');');
+      js.push('c.scale(size, -size);');
+
+      var stack = [], x = 0, y = 0;
+      compileCharString(code, js, this);
+
+      js.push('c.restore();');
+
+      /*jshint -W054 */
+      return new Function('c', 'size', js.join('\n'));
+    }
+  };
+
+  return {
+    create: function FontRendererFactory_create(font) {
+      var data = new Uint8Array(font.data);
+      var cmap, glyf, loca, cff, indexToLocFormat, unitsPerEm;
+      var numTables = getUshort(data, 4);
+      for (var i = 0, p = 12; i < numTables; i++, p += 16) {
+        var tag = String.fromCharCode.apply(null, data.subarray(p, p + 4));
+        var offset = getLong(data, p + 8);
+        var length = getLong(data, p + 12);
+        switch (tag) {
+          case 'cmap':
+            cmap = parseCmap(data, offset, offset + length);
+            break;
+          case 'glyf':
+            glyf = data.subarray(offset, offset + length);
+            break;
+          case 'loca':
+            loca = data.subarray(offset, offset + length);
+            break;
+          case 'head':
+            unitsPerEm = getUshort(data, offset + 18);
+            indexToLocFormat = getUshort(data, offset + 50);
+            break;
+          case 'CFF ':
+            cff = parseCff(data, offset, offset + length);
+            break;
+        }
+      }
+
+      if (glyf) {
+        var fontMatrix = !unitsPerEm ? font.fontMatrix :
+          [1 / unitsPerEm, 0, 0, 1 / unitsPerEm, 0, 0];
+        return new TrueTypeCompiled(
+          parseGlyfTable(glyf, loca, indexToLocFormat), cmap, fontMatrix);
+      } else {
+        return new Type2Compiled(cff, cmap, font.fontMatrix, font.glyphNameMap);
+      }
+    }
+  };
+})();
+

src/display/metadata.js

@@ -0,0 +1,97 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals Document, error, PDFJS */
+/* Copyright 2012 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+var Metadata = PDFJS.Metadata = (function MetadataClosure() {
+  function fixMetadata(meta) {
+    return meta.replace(/>\\376\\377([^<]+)/g, function(all, codes) {
+      var bytes = codes.replace(/\\([0-3])([0-7])([0-7])/g,
+                                function(code, d1, d2, d3) {
+        return String.fromCharCode(d1 * 64 + d2 * 8 + d3 * 1);
+      });
+      var chars = '';
+      for (var i = 0; i < bytes.length; i += 2) {
+        var code = bytes.charCodeAt(i) * 256 + bytes.charCodeAt(i + 1);
+        chars += code >= 32 && code < 127 && code != 60 && code != 62 &&
+          code != 38 && false ? String.fromCharCode(code) :
+          '&#x' + (0x10000 + code).toString(16).substring(1) + ';';
+      }
+      return '>' + chars;
+    });
+  }
+
+  function Metadata(meta) {
+    if (typeof meta === 'string') {
+      // Ghostscript produces invalid metadata
+      meta = fixMetadata(meta);
+
+      var parser = new DOMParser();
+      meta = parser.parseFromString(meta, 'application/xml');
+    } else if (!(meta instanceof Document)) {
+      error('Metadata: Invalid metadata object');
+    }
+
+    this.metaDocument = meta;
+    this.metadata = {};
+    this.parse();
+  }
+
+  Metadata.prototype = {
+    parse: function Metadata_parse() {
+      var doc = this.metaDocument;
+      var rdf = doc.documentElement;
+
+      if (rdf.nodeName.toLowerCase() !== 'rdf:rdf') { // Wrapped in <xmpmeta>
+        rdf = rdf.firstChild;
+        while (rdf && rdf.nodeName.toLowerCase() !== 'rdf:rdf')
+          rdf = rdf.nextSibling;
+      }
+
+      var nodeName = (rdf) ? rdf.nodeName.toLowerCase() : null;
+      if (!rdf || nodeName !== 'rdf:rdf' || !rdf.hasChildNodes())
+        return;
+
+      var children = rdf.childNodes, desc, entry, name, i, ii, length, iLength;
+
+      for (i = 0, length = children.length; i < length; i++) {
+        desc = children[i];
+        if (desc.nodeName.toLowerCase() !== 'rdf:description')
+          continue;
+
+        for (ii = 0, iLength = desc.childNodes.length; ii < iLength; ii++) {
+          if (desc.childNodes[ii].nodeName.toLowerCase() !== '#text') {
+            entry = desc.childNodes[ii];
+            name = entry.nodeName.toLowerCase();
+            this.metadata[name] = entry.textContent.trim();
+          }
+        }
+      }
+    },
+
+    get: function Metadata_get(name) {
+      return this.metadata[name] || null;
+    },
+
+    has: function Metadata_has(name) {
+      return typeof this.metadata[name] !== 'undefined';
+    }
+  };
+
+  return Metadata;
+})();