Move the creation of canvas path fonts to the worker.

examples/acroforms/index.html

@@ -13,7 +13,6 @@
   <script type="text/javascript" src="../../src/display/metadata.js"></script>
   <script type="text/javascript" src="../../src/display/canvas.js"></script>
   <script type="text/javascript" src="../../src/display/font_loader.js"></script>
-  <script type="text/javascript" src="../../src/display/font_renderer.js"></script>
 
   <script type="text/javascript">
     // Specify the main script used to create a new PDF.JS web worker.

examples/helloworld/index.html

@@ -13,7 +13,6 @@
   <script type="text/javascript" src="../../src/display/metadata.js"></script>
   <script type="text/javascript" src="../../src/display/canvas.js"></script>
   <script type="text/javascript" src="../../src/display/font_loader.js"></script>
-  <script type="text/javascript" src="../../src/display/font_renderer.js"></script>
 
   <script type="text/javascript">
     // Specify the main script used to create a new PDF.JS web worker.

make.js

@@ -278,8 +278,7 @@ target.bundle = function(args) {
     'display/api.js',
     'display/metadata.js',
     'display/canvas.js',
-    'display/font_loader.js',
-    'display/font_renderer.js'
+    'display/font_loader.js'
   ];
 
   var WORKER_SRC_FILES = [
@@ -298,6 +297,7 @@ target.bundle = function(args) {
     'core/crypto.js',
     'core/evaluator.js',
     'core/fonts.js',
+    'core/font_renderer.js',
     'core/glyphlist.js',
     'core/image.js',
     'core/metrics.js',

src/core/evaluator.js

@@ -20,7 +20,7 @@
            isStream, isString, JpegStream, Lexer, Metrics, Name, Parser,
            Pattern, PDFImage, PDFJS, serifFonts, stdFontMap, symbolsFonts,
            TilingPattern, TODO, warn, Util, Promise,
-           RefSetCache, isRef */
+           RefSetCache, isRef, TextRenderingMode */
 
 'use strict';
 
@@ -349,6 +349,31 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
       return loadedName;
     },
 
+    handleText: function PartialEvaluator_handleText(chars) {
+      var font = this.state.font.translated;
+      var glyphs = font.charsToGlyphs(chars);
+      var isAddToPathSet = !!(this.state.textRenderingMode &
+                              TextRenderingMode.ADD_TO_PATH_FLAG);
+      if (isAddToPathSet || PDFJS.disableFontFace) {
+        for (var i = 0; i < glyphs.length; i++) {
+          if (glyphs[i] === null) {
+            continue;
+          }
+          var fontChar = glyphs[i].fontChar;
+          if (!font.renderer.hasBuiltPath(fontChar)) {
+            var path = font.renderer.getPathJs(fontChar);
+            this.handler.send('commonobj', [
+              font.loadedName + '_path_' + fontChar,
+              'FontPath',
+              path
+            ]);
+          }
+        }
+      }
+
+      return glyphs;
+    },
+
     setGState: function PartialEvaluator_setGState(resources, gState,
                                                    operatorList) {
 
@@ -631,19 +656,21 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
               this.state = prev;
             }
           } else if (cmd === 'Tj') { // showText
-            args[0] = this.state.font.translated.charsToGlyphs(args[0]);
+            args[0] = this.handleText(args[0]);
           } else if (cmd === 'TJ') { // showSpacedText
             var arr = args[0];
             var arrLength = arr.length;
             for (var i = 0; i < arrLength; ++i) {
               if (isString(arr[i])) {
-                arr[i] = this.state.font.translated.charsToGlyphs(arr[i]);
+                arr[i] = this.handleText(arr[i]);
               }
             }
           } else if (cmd === '\'') { // nextLineShowText
-            args[0] = this.state.font.translated.charsToGlyphs(args[0]);
+            args[0] = this.handleText(args[0]);
           } else if (cmd === '"') { // nextLineSetSpacingShowText
-            args[2] = this.state.font.translated.charsToGlyphs(args[2]);
+            args[2] = this.handleText(args[2]);
+          } else if (cmd === 'Tr') { // setTextRenderingMode
+            this.state.textRenderingMode = args[0];
           }
 
           switch (fn) {
@@ -1529,6 +1556,7 @@ var OperatorList = (function OperatorListClosure() {
 var EvalState = (function EvalStateClosure() {
   function EvalState() {
     this.font = null;
+    this.textRenderingMode = TextRenderingMode.FILL;
   }
   EvalState.prototype = {
     clone: function CanvasExtraState_clone() {

src/core/font_renderer.js

@@ -14,7 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* globals error, Stream, GlyphsUnicode, CFFParser, Encodings */
+/* globals error, Stream, GlyphsUnicode, CFFParser, Encodings, Util */
 
 'use strict';
 
@@ -585,18 +585,14 @@ var FontRendererFactory = (function FontRendererFactoryClosure() {
     parse(code);
   }
 
-  function TrueTypeCompiled(glyphs, cmap, fontMatrix) {
-    this.glyphs = glyphs;
-    this.cmap = cmap;
-    this.fontMatrix = fontMatrix || [0.000488, 0, 0, 0.000488, 0, 0];
+  var noop = '';
 
-    this.compiledGlyphs = [];
+  function CompiledFont(fontMatrix) {
+    this.compiledGlyphs = {};
+    this.fontMatrix = fontMatrix;
   }
-
-  var noop = function () {};
-
-  TrueTypeCompiled.prototype = {
-    getPathGenerator: function (unicode) {
+  CompiledFont.prototype = {
+    getPathJs: function (unicode) {
       var gid = lookupCmap(this.cmap, unicode);
       var fn = this.compiledGlyphs[gid];
       if (!fn) {
@@ -604,6 +600,7 @@ var FontRendererFactory = (function FontRendererFactoryClosure() {
       }
       return fn;
     },
+
     compileGlyph: function (code) {
       if (!code || code.length === 0 || code[0] === 14) {
         return noop;
@@ -614,23 +611,47 @@ var FontRendererFactory = (function FontRendererFactoryClosure() {
       js.push('c.transform(' + this.fontMatrix.join(',') + ');');
       js.push('c.scale(size, -size);');
 
-      var stack = [], x = 0, y = 0;
-      compileGlyf(code, js, this);
+      this.compileGlyphImpl(code, js);
 
       js.push('c.restore();');
 
-      /*jshint -W054 */
-      return new Function('c', 'size', js.join('\n'));
+      return js.join('\n');
+    },
+
+    compileGlyphImpl: function () {
+      error('Children classes should implement this.');
+    },
+
+    hasBuiltPath: function (unicode) {
+      var gid = lookupCmap(this.cmap, unicode);
+      return gid in this.compiledGlyphs;
     }
   };
 
+  function TrueTypeCompiled(glyphs, cmap, fontMatrix) {
+    fontMatrix = fontMatrix || [0.000488, 0, 0, 0.000488, 0, 0];
+    CompiledFont.call(this, fontMatrix);
+
+    this.glyphs = glyphs;
+    this.cmap = cmap;
+
+    this.compiledGlyphs = [];
+  }
+
+  Util.inherit(TrueTypeCompiled, CompiledFont, {
+    compileGlyphImpl: function (code, js) {
+      compileGlyf(code, js, this);
+    }
+  });
+
   function Type2Compiled(cffInfo, cmap, fontMatrix, glyphNameMap) {
+    fontMatrix = fontMatrix || [0.001, 0, 0, 0.001, 0, 0];
+    CompiledFont.call(this, fontMatrix);
     this.glyphs = cffInfo.glyphs;
     this.gsubrs = cffInfo.gsubrs || [];
     this.subrs = cffInfo.subrs || [];
     this.cmap = cmap;
     this.glyphNameMap = glyphNameMap || GlyphsUnicode;
-    this.fontMatrix = fontMatrix || [0.001, 0, 0, 0.001, 0, 0];
 
     this.compiledGlyphs = [];
     this.gsubrsBias = this.gsubrs.length < 1240 ? 107 :
@@ -639,34 +660,12 @@ var FontRendererFactory = (function FontRendererFactoryClosure() {
                      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;
+  Util.inherit(Type2Compiled, CompiledFont, {
+    compileGlyphImpl: function (code, js) {
       compileCharString(code, js, this);
-
-      js.push('c.restore();');
-
-      /*jshint -W054 */
-      return new Function('c', 'size', js.join('\n'));
     }
-  };
+  });
+
 
   return {
     create: function FontRendererFactory_create(font) {

src/core/fonts.js

@@ -18,7 +18,7 @@
            ExpertSubsetCharset, FileReaderSync, GlyphsUnicode,
            info, isArray, isNum, ISOAdobeCharset, Stream,
            stringToBytes, TextDecoder, TODO, warn, Lexer, Util,
-           FONT_IDENTITY_MATRIX */
+           FONT_IDENTITY_MATRIX, FontRendererFactory, shadow */
 
 'use strict';
 
@@ -2791,6 +2791,10 @@ var Font = (function FontClosure() {
     font: null,
     mimetype: null,
     encoding: null,
+    get renderer() {
+      var renderer = FontRendererFactory.create(this);
+      return shadow(this, 'renderer', renderer);
+    },
 
     exportData: function Font_exportData() {
       var data = {};

src/core/worker.js

@@ -224,6 +224,7 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
 
       PDFJS.maxImageSize = data.maxImageSize === undefined ?
                            -1 : data.maxImageSize;
+      PDFJS.disableFontFace = data.disableFontFace;
 
       getPdfManager(data).then(function pdfManagerReady() {
         loadDocument(false).then(onSuccess, function loadFailure(ex) {

src/display/api.js

@@ -29,6 +29,16 @@
  */
 PDFJS.maxImageSize = PDFJS.maxImageSize === undefined ? -1 : PDFJS.maxImageSize;
 
+/**
+ * By default fonts are converted to OpenType fonts and loaded via font face
+ * rules. If disabled, the font will be rendered using a built in font renderer
+ * that constructs the glyphs with primitive path commands.
+ * @var {Boolean}
+ */
+PDFJS.disableFontFace = PDFJS.disableFontFace === undefined ?
+                        false :
+                        PDFJS.disableFontFace;
+
 /**
  * This is the main entry point for loading a PDF and interacting with it.
  * NOTE: If a URL is used to fetch the PDF data a standard XMLHttpRequest(XHR)
@@ -673,6 +683,9 @@ var WorkerTransport = (function WorkerTransportClosure() {
               }.bind(this)
             );
             break;
+          case 'FontPath':
+            this.commonObjs.resolve(id, data[2]);
+            break;
           default:
             error('Got unknown common object type ' + type);
         }
@@ -770,7 +783,8 @@ var WorkerTransport = (function WorkerTransportClosure() {
       this.messageHandler.send('GetDocRequest', {
         source: source,
         disableRange: PDFJS.disableRange,
-        maxImageSize: PDFJS.maxImageSize
+        maxImageSize: PDFJS.maxImageSize,
+        disableFontFace: PDFJS.disableFontFace
       });
     },
 

src/display/canvas.js

@@ -16,26 +16,14 @@
  */
 /* globals ColorSpace, DeviceCmykCS, DeviceGrayCS, DeviceRgbCS, error,
            FONT_IDENTITY_MATRIX, IDENTITY_MATRIX, ImageData, isArray, isNum,
-           Pattern, TilingPattern, TODO, Util, warn, assert, info */
+           Pattern, TilingPattern, TODO, Util, warn, assert, info,
+           TextRenderingMode */
 
 'use strict';
 
 // <canvas> contexts store most of the state we need natively.
 // However, PDF needs a bit more state, which we store here.
 
-var TextRenderingMode = {
-  FILL: 0,
-  STROKE: 1,
-  FILL_STROKE: 2,
-  INVISIBLE: 3,
-  FILL_ADD_TO_PATH: 4,
-  STROKE_ADD_TO_PATH: 5,
-  FILL_STROKE_ADD_TO_PATH: 6,
-  ADD_TO_PATH: 7,
-  FILL_STROKE_MASK: 3,
-  ADD_TO_PATH_FLAG: 4
-};
-
 // Minimal font size that would be used during canvas fillText operations.
 var MIN_FONT_SIZE = 16;
 
@@ -1007,7 +995,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
 
       var addToPath;
       if (font.disableFontFace || isAddToPathSet) {
-        addToPath = font.renderer.getPathGenerator(character);
+        addToPath = font.getPathGenerator(this.commonObjs, character);
       }
 
       if (font.disableFontFace) {

src/display/font_loader.js

@@ -14,8 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-/* globals PDFJS, shadow, isWorker, assert, warn, FontRendererFactory,
-           bytesToString, globalScope */
+/* globals PDFJS, shadow, isWorker, assert, warn, bytesToString, globalScope */
 
 'use strict';
 
@@ -267,6 +266,7 @@ var FontLoader = {
 
 var FontFace = (function FontFaceClosure() {
   function FontFace(name, file, properties) {
+    this.compiledGlyphs = {};
     if (arguments.length === 1) {
       // importing translated data
       var data = arguments[0];
@@ -277,10 +277,6 @@ var FontFace = (function FontFaceClosure() {
     }
   }
   FontFace.prototype = {
-    get renderer() {
-      var renderer = FontRendererFactory.create(this);
-      return shadow(this, 'renderer', renderer);
-    },
     bindDOM: function FontFace_bindDOM() {
       if (!this.data)
         return null;
@@ -305,6 +301,14 @@ var FontFace = (function FontFaceClosure() {
         globalScope['FontInspector'].fontAdded(this, url);
 
       return rule;
+    },
+    getPathGenerator: function (objs, character) {
+      if (!(character in this.compiledGlyphs)) {
+        var js = objs.get(this.loadedName + '_path_' + character);
+        /*jshint -W054 */
+        this.compiledGlyphs[character] = new Function('c', 'size', js);
+      }
+      return this.compiledGlyphs[character];
     }
   };
   return FontFace;

src/shared/util.js

@@ -27,6 +27,19 @@ var verbosity = WARNINGS;
 
 var FONT_IDENTITY_MATRIX = [0.001, 0, 0, 0.001, 0, 0];
 
+var TextRenderingMode = {
+  FILL: 0,
+  STROKE: 1,
+  FILL_STROKE: 2,
+  INVISIBLE: 3,
+  FILL_ADD_TO_PATH: 4,
+  STROKE_ADD_TO_PATH: 5,
+  FILL_STROKE_ADD_TO_PATH: 6,
+  ADD_TO_PATH: 7,
+  FILL_STROKE_MASK: 3,
+  ADD_TO_PATH_FLAG: 4
+};
+
 // The global PDFJS object exposes the API
 // In production, it will be declared outside a global wrapper
 // In development, it will be declared here

src/worker_loader.js

@@ -35,6 +35,7 @@ var files = [
   'core/crypto.js',
   'core/evaluator.js',
   'core/fonts.js',
+  'core/font_renderer.js',
   'core/glyphlist.js',
   'core/image.js',
   'core/metrics.js',

test/test_manifest.json

@@ -1063,6 +1063,13 @@
       "link": true,
       "type": "eq"
     },
+    {  "id": "issue3584",
+      "file": "pdfs/issue3584.pdf",
+      "md5": "7a00646865a840eefc76f05c588b60ce",
+      "rounds": 1,
+      "type": "eq",
+      "about": "CFF font that is drawn with clipping."
+    },
     {  "id": "annotation-tx",
       "file": "pdfs/annotation-tx.pdf",
       "md5": "56321ea830be9c4f8437ca17ac535b2d",

test/test_slave.html

@@ -28,7 +28,6 @@ limitations under the License.
     <script type="text/javascript" src="/src/display/metadata.js"></script>
     <script type="text/javascript" src="/src/display/canvas.js"></script>
     <script type="text/javascript" src="/src/display/font_loader.js"></script>
-    <script type="text/javascript" src="/src/display/font_renderer.js"></script>
     <script type="text/javascript" src="driver.js"></script>
 
     <script type="text/javascript">

web/viewer.html

@@ -50,7 +50,6 @@ limitations under the License.
     <script type="text/javascript" src="../src/display/metadata.js"></script>
     <script type="text/javascript" src="../src/display/canvas.js"></script>
     <script type="text/javascript" src="../src/display/font_loader.js"></script>
-    <script type="text/javascript" src="../src/display/font_renderer.js"></script>
     <script type="text/javascript">PDFJS.workerSrc = '../src/worker_loader.js';</script>
 <!--#endif-->