Eliminate copies of encoded image data

third_party/WebKit/Source/platform/graphics/DeferredImageDecoderTest.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
@@ skipping 13 matching lines @@
  */
 
 #include "platform/graphics/DeferredImageDecoder.h"
 
 #include "platform/SharedBuffer.h"
 #include "platform/Task.h"
 #include "platform/ThreadSafeFunctional.h"
 #include "platform/graphics/ImageDecodingStore.h"
 #include "platform/graphics/ImageFrameGenerator.h"
 #include "platform/graphics/test/MockImageDecoder.h"
+#include "platform/image-decoders/SharedBufferSegmentReader.h"
 #include "public/platform/Platform.h"
 #include "public/platform/WebThread.h"
 #include "public/platform/WebTraceLocation.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkPicture.h"
 #include "third_party/skia/include/core/SkPictureRecorder.h"
 #include "third_party/skia/include/core/SkPixmap.h"
 #include "third_party/skia/include/core/SkSurface.h"
+#include "third_party/skia/src/core/SkRWBuffer.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 namespace {
 
 // Raw data for a PNG file with 1x1 white pixels.
 const unsigned char whitePNG[] = {
     0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, 0x00, 0x00,
@@ skipping 278 matching lines @@
     m_frameCount = 2;
     m_lazyDecoder->setData(*m_data, false);
     EXPECT_EQ(m_frameCount, m_lazyDecoder->frameCount());
     m_frameCount = 0;
     m_lazyDecoder->setData(*m_data, true);
     EXPECT_EQ(m_frameCount, m_lazyDecoder->frameCount());
 }
 
 TEST_F(DeferredImageDecoderTest, frameOpacity)
 {
-    OwnPtr<ImageDecoder> actualDecoder = ImageDecoder::create(*m_data,
+    RefPtr<SharedBufferSegmentReader> segmentReader = adoptRef(new SharedBufferSegmentReader(m_data));
+    OwnPtr<ImageDecoder> actualDecoder = ImageDecoder::create(*segmentReader.get(),
         ImageDecoder::AlphaPremultiplied, ImageDecoder::GammaAndColorProfileApplied);
     OwnPtr<DeferredImageDecoder> decoder = DeferredImageDecoder::createForTesting(actualDecoder.release());
     decoder->setData(*m_data, true);
 
     SkImageInfo pixInfo = SkImageInfo::MakeN32Premul(1, 1);
     SkAutoPixmapStorage pixels;
     pixels.alloc(pixInfo);
 
     // Before decoding, the frame is not known to be opaque.
     RefPtr<SkImage> frame = decoder->createFrameAtIndex(0);
     ASSERT_TRUE(frame);
     EXPECT_FALSE(frame->isOpaque());
 
     // Force a lazy decode by reading pixels.
     EXPECT_TRUE(frame->readPixels(pixels, 0, 0));
 
     // After decoding, the frame is known to be opaque.
     frame = decoder->createFrameAtIndex(0);
     ASSERT_TRUE(frame);
     EXPECT_TRUE(frame->isOpaque());
 
     // Re-generating the opaque-marked frame should not fail.
     EXPECT_TRUE(frame->readPixels(pixels, 0, 0));
 }
 
 } // namespace blink