Do not assume charset is defined and move some fonts timing to the right place

pdf.js

@@ -1729,15 +1729,14 @@ var CanvasGraphics = (function() {
             var fontName = descriptor.get("FontName").name;
             fontName = fontName.replace("+", "_");
 
-            var font = Fonts[fontName];
-            if (!font) {
             var fontFile = descriptor.get2("FontFile", "FontFile2");
+            if (!fontFile)
+              errort("FontFile not found for font: " + fontName);
             fontFile = xref.fetchIfRef(fontFile);
 
             // Generate the custom cmap of the font if needed
             var encodingMap = {};
             if (fontDict.has("Encoding")) {
-
                 var encoding = xref.fetchIfRef(fontDict.get("Encoding"));
                 if (IsDict(encoding)) {
                     // Build an map between codes and glyphs
@@ -1748,8 +1747,10 @@ var CanvasGraphics = (function() {
                         IsNum(data) ? index = data : encodingMap[index++] = data;
                     }
 
-                      // Get the font charset
-                      var charset = descriptor.get("CharSet").split("/");
+                    // Get the font charset if any
+                    var charset = descriptor.get("CharSet");
+                    if (charset)
+                      charset = charset.split("/");
 
                 } else if (IsName(encoding)) {
                     var encoding = Encodings[encoding];
@@ -1761,6 +1762,7 @@ var CanvasGraphics = (function() {
                         var index = widths[j];
                         if (!index)
                           continue;
+
                         charset.push(encoding[j + firstchar]);
                     }
                 }
@@ -1772,9 +1774,12 @@ var CanvasGraphics = (function() {
                 charset: charset,
                 bbox: descriptor.get("FontBBox")
             };
-              new Font(fontName, fontFile, properties);
+
+            return {
+                name: fontName,
+              file: fontFile,
+              properties: properties
             }
-          return Fonts[fontName];
         },
 
         beginDrawing: function(mediaBox) {

test.js

@@ -74,30 +74,43 @@ function displayPage(num) {
     page.compile(gfx, fonts);
     var t2 = Date.now();
 
-    var interval = 0;
-    for (var i = 0; i < fonts.length; i++) {
-      if (fonts[i].loading) {
-        interval = 10;
-        break;
+    var fontsReady = true;
+
+    // Inspect fonts and translate the missing one
+    var count = fonts.length;
+    for (var i = 0; i < count; i++) {
+      var font = fonts[i];
+      if (Fonts[font.name]) {
+        fontsReady = fontsReady && !Fonts[font.name].loading;
+        continue;
+      }
+
+      new Font(font.name, font.file, font.properties);
+      fontsReady = false;
     }
-    };
 
-    // FIXME This need to be replaced by an event
-    pageInterval = setInterval(function() {
-        for (var i = 0; i < fonts.length; i++) {
-            if (fonts[i].loading)
+    function delayLoadFont() {
+      for (var i = 0; i < count; i++) {
+        if (Fonts[font.name].loading)
           return;
       }
+      clearInterval(pageInterval);
+
       var t3 = Date.now();
 
-        clearInterval(pageInterval);
       page.display(gfx);
 
       var t4 = Date.now();
 
       var infoDisplay = document.getElementById("info");
       infoDisplay.innerHTML = "Time to load/compile/fonts/render: "+ (t1 - t0) + "/" + (t2 - t1) + "/" + (t3 - t2) + "/" + (t4 - t3) + " ms";
-    }, interval);
+    };
+
+    if (fontsReady) {
+      delayLoadFont();
+    } else {
+      pageInterval = setInterval(delayLoadFont, 10);
+    }
 }
 
 function nextPage() {