Move font translation to the worker

src/api.js

@@ -575,24 +575,15 @@ var WorkerTransport = (function WorkerTransportClosure() {
             this.objs.resolve(id, imageData);
             break;
           case 'Font':
-            var name = data[2];
-            var file = data[3];
-            var properties = data[4];
-
-            if (file) {
-              // Rewrap the ArrayBuffer in a stream.
-              var fontFileDict = new Dict();
-              file = new Stream(file, 0, file.length, fontFileDict);
-            }
+            var exportedData = data[2];
 
             // At this point, only the font object is created but the font is
             // not yet attached to the DOM. This is done in `FontLoader.bind`.
             var font;
-            try {
-              font = new Font(name, file, properties);
-            } catch (e) {
-              font = new ErrorFont(e);
-            }
+            if ('error' in exportedData)
+              font = new ErrorFont(exportedData.error);
+            else
+              font = new Font(exportedData);
             this.objs.resolve(id, font);
             break;
           default:

src/evaluator.js

@@ -171,31 +171,30 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
 
         ++self.objIdCounter;
         if (!font.loadedName) {
-          font.translated = self.translateFont(font, xref, resources,
+          var translated = self.translateFont(font, xref, resources,
                                               dependency);
-          if (font.translated) {
+          if (translated) {
             // keep track of each font we translated so the caller can
             // load them asynchronously before calling display on a page
             loadedName = 'font_' + uniquePrefix + self.objIdCounter;
-            font.translated.properties.loadedName = loadedName;
+            translated.properties.loadedName = loadedName;
             font.loadedName = loadedName;
+            font.translated = translated;
 
-            var translated = font.translated;
-            // Convert the file to an ArrayBuffer which will be turned back into
-            // a Stream in the main thread.
-            if (translated.file)
-              translated.file = translated.file.getBytes();
-            if (translated.properties.file) {
-              translated.properties.file =
-                  translated.properties.file.getBytes();
+            var data;
+            try {
+              var fontObj = new Font(translated.name,
+                                     translated.file,
+                                     translated.properties);
+              data = fontObj.export();
+            } catch (e) {
+              data = { error: e };
             }
 
             handler.send('obj', [
                 loadedName,
                 'Font',
-                translated.name,
-                translated.file,
-                translated.properties
+                data
             ]);
           }
         }

src/fonts.js

@@ -1526,6 +1526,15 @@ function fontCharsToUnicode(charCodes, fontProperties) {
  */
 var Font = (function FontClosure() {
   function Font(name, file, properties) {
+    if (arguments.length === 1) {
+      // importing translated data
+      var data = arguments[0];
+      for (var i in data) {
+        this[i] = data[i];
+      }
+      return;
+    }
+
     this.name = name;
     this.coded = properties.coded;
     this.charProcOperatorList = properties.charProcOperatorList;
@@ -2036,6 +2045,15 @@ var Font = (function FontClosure() {
     mimetype: null,
     encoding: null,
 
+    export: function Font_export() {
+      var data = {};
+      for (var i in this) {
+        if (this.hasOwnProperty(i))
+          data[i] = this[i];
+      }
+      return data;
+    },
+
     checkAndRepair: function Font_checkAndRepair(name, font, properties) {
       function readTableEntry(file) {
         var tag = file.getBytes(4);