Fix loading of PDF files with invalid or missing Type3 characters (issue 5039)

src/core/evaluator.js

@@ -1760,13 +1760,16 @@ var TranslatedFont = (function TranslatedFontClosure() {
           var glyphStream = charProcs[key];
           var operatorList = new OperatorList();
           return evaluator.getOperatorList(glyphStream, fontResources,
-            operatorList).
-            then(function () {
+                                           operatorList).then(function () {
             charProcOperatorList[key] = operatorList.getIR();
 
             // Add the dependencies to the parent operator list so they are
             // resolved before sub operator list is executed synchronously.
             parentOperatorList.addDependencies(operatorList.dependencies);
+          }, function (reason) {
+            warn('Type3 font resource \"' + key + '\" is not available');
+            var operatorList = new OperatorList();
+            charProcOperatorList[key] = operatorList.getIR();
           });
         }.bind(this, charProcKeys[i]));
       }

src/display/canvas.js

@@ -1489,11 +1489,16 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
           continue;
         }
 
+        var operatorList = font.charProcOperatorList[glyph.operatorListId];
+        if (!operatorList) {
+          warn('Type3 character \"' + glyph.operatorListId +
+               '\" is not available');
+          continue;
+        }
         this.processingType3 = glyph;
         this.save();
         ctx.scale(fontSize, fontSize);
         ctx.transform.apply(ctx, fontMatrix);
-        var operatorList = font.charProcOperatorList[glyph.operatorListId];
         this.executeOperatorList(operatorList);
         this.restore();
 

test/pdfs/.gitignore

@@ -52,6 +52,7 @@
 !issue1002.pdf
 !issue925.pdf
 !issue4668.pdf
+!issue5039.pdf
 !gradientfill.pdf
 !bug903856.pdf
 !bug850854.pdf

test/test_manifest.json

@@ -1024,6 +1024,13 @@
       "link": true,
       "type": "eq"
     },
+    {  "id": "issue5039",
+       "file": "pdfs/issue5039.pdf",
+       "md5": "5c131f458ee6b65cc096ccaf0474ee3a",
+       "link": false,
+       "rounds": 1,
+       "type": "eq"
+    },
     {  "id": "issue1257",
       "file": "pdfs/issue1257.pdf",
       "md5": "9111533826bc21ed774e8e01603a2f54",