Save a bitmap copy when advancing to dependent GIF and WebP animation frames

third_party/WebKit/Source/platform/graphics/ImageFrameGenerator.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 284 matching lines @@
     (*decoder)->setMemoryAllocator(0);
 
     if (!frame || frame->getStatus() == ImageFrame::FrameEmpty)
         return false;
 
     // A cache object is considered complete if we can decode a complete frame.
     // Or we have received all data. The image might not be fully decoded in
     // the latter case.
     const bool isDecodeComplete = frame->getStatus() == ImageFrame::FrameComplete || allDataReceived;
 
-    SkBitmap fullSizeBitmap = frame->bitmap();
+    SkBitmap fullSizeBitmap = frame->bitmap(false);
     if (!fullSizeBitmap.isNull()) {
         ASSERT(fullSizeBitmap.width() == m_fullSize.width() && fullSizeBitmap.height() == m_fullSize.height());
         setHasAlpha(index, !fullSizeBitmap.isOpaque());
     }
 
     *bitmap = fullSizeBitmap;
     return isDecodeComplete;
 }
 
 bool ImageFrameGenerator::hasAlpha(size_t index)
@@ skipping 17 matching lines @@
 
     // Setting a dummy ImagePlanes object signals to the decoder that we want to do YUV decoding.
     decoder->setData(data, true);
     std::unique_ptr<ImagePlanes> dummyImagePlanes = wrapUnique(new ImagePlanes);
     decoder->setImagePlanes(std::move(dummyImagePlanes));
 
     return updateYUVComponentSizes(decoder.get(), sizeInfo->fSizes, sizeInfo->fWidthBytes);
 }
 
 } // namespace blink