Allowing YUV data to be retrieved from the JPEG Decoder.

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 115 matching lines @@
     // This method is called to populate a discardable memory owned by Skia.
 
     // Prevents concurrent decode or scale operations on the same image data.
     MutexLocker lock(m_decodeMutex);
 
     // This implementation does not support scaling so check the requested size.
     SkISize scaledSize = SkISize::Make(info.fWidth, info.fHeight);
     ASSERT(m_fullSize == scaledSize);
 
     if (m_decodeFailedAndEmpty)
-        return 0;
+        return false;

[Noel Gordon, 2014/07/25 15:55:01]

This change seems unrelated to yuv decoding.  Perhaps submit it in another
patch.

[sugoi1, 2014/07/25 16:56:47]

Done.

 
     TRACE_EVENT2("blink", "ImageFrameGenerator::decodeAndScale", "generator", this, "decodeCount", static_cast<int>(m_decodeCount));
 
     // Don't use discardable memory for decoding if Skia is providing output
     // memory. Instead use ExternalMemoryAllocator such that we can
     // write directly to the memory given by Skia.
     //
     // TODO:
     // This is not pretty because this class is used in two different code
     // paths: discardable memory decoding on Android and discardable memory
@@ skipping 171 matching lines @@
 
 bool ImageFrameGenerator::hasAlpha(size_t index)
 {
     MutexLocker lock(m_alphaMutex);
     if (index < m_hasAlpha.size())
         return m_hasAlpha[index];
     return true;
 }
 
 } // namespace