Insert an empty image when we cannot decode

src/core/SkReadBuffer.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkBitmap.h"
 #include "SkErrorInternals.h"
@@ skipping 295 matching lines @@
     }
 
     int originX = this->read32();
     int originY = this->read32();
     if (originX < 0 || originY < 0) {
         this->validate(false);
         return nullptr;
     }
 
     const SkIRect subset = SkIRect::MakeXYWH(originX, originY, width, height);
-    return SkImage::NewFromEncoded(encoded, &subset);
+    SkImage* image = SkImage::NewFromEncoded(encoded, &subset);
+    if (image) {
+        return image;
+    }
+
+    return SkImage::NewFromGenerator(
+            new EmptyImageGenerator(SkImageInfo::MakeN32Premul(width, height)));
 }
 
 SkTypeface* SkReadBuffer::readTypeface() {
 
     uint32_t index = fReader.readU32();
     if (0 == index || index > (unsigned)fTFCount) {
         return nullptr;
     } else {
         SkASSERT(fTFArray);
         return fTFArray[index - 1];
@@ skipping 70 matching lines @@
             return;
         }
     } else {
         if (nullptr == this->readFunctionPtr()) {
             return;
         }
     }
     uint32_t sizeRecorded = fReader.readU32();
     fReader.skip(sizeRecorded);
 }