1/* 2 * Copyright (C) 2012 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef DeferredImageDecoder_h 27#define DeferredImageDecoder_h 28 29#include "SkBitmap.h" 30#include "SkPixelRef.h" 31#include "platform/PlatformExport.h" 32#include "platform/geometry/IntSize.h" 33#include "platform/graphics/ImageFrameGenerator.h" 34#include "platform/graphics/ImageSource.h" 35#include "platform/image-decoders/ImageDecoder.h" 36#include "wtf/Forward.h" 37#include "wtf/OwnPtr.h" 38#include "wtf/Vector.h" 39 40namespace blink { 41 42class ImageFrameGenerator; 43class SharedBuffer; 44 45class PLATFORM_EXPORT DeferredImageDecoder { 46 WTF_MAKE_NONCOPYABLE(DeferredImageDecoder); 47public: 48 ~DeferredImageDecoder(); 49 static PassOwnPtr<DeferredImageDecoder> create(const SharedBuffer& data, ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption); 50 51 static PassOwnPtr<DeferredImageDecoder> createForTesting(PassOwnPtr<ImageDecoder>); 52 53 static bool isLazyDecoded(const SkBitmap&); 54 55 static void setEnabled(bool); 56 static bool enabled(); 57 58 String filenameExtension() const; 59 60 ImageFrame* frameBufferAtIndex(size_t index); 61 62 void setData(SharedBuffer& data, bool allDataReceived); 63 64 bool isSizeAvailable(); 65 bool hasColorProfile() const; 66 IntSize size() const; 67 IntSize frameSizeAtIndex(size_t index) const; 68 size_t frameCount(); 69 int repetitionCount() const; 70 size_t clearCacheExceptFrame(size_t); 71 bool frameHasAlphaAtIndex(size_t index) const; 72 bool frameIsCompleteAtIndex(size_t) const; 73 float frameDurationAtIndex(size_t) const; 74 unsigned frameBytesAtIndex(size_t index) const; 75 ImageOrientation orientation() const; 76 bool hotSpot(IntPoint&) const; 77 78 // For testing. 79 ImageFrameGenerator* frameGenerator() { return m_frameGenerator.get(); } 80 81private: 82 explicit DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder); 83 void prepareLazyDecodedFrames(); 84 SkBitmap createBitmap(size_t index); 85 void activateLazyDecoding(); 86 87 RefPtr<SharedBuffer> m_data; 88 bool m_allDataReceived; 89 unsigned m_lastDataSize; 90 bool m_dataChanged; 91 OwnPtr<ImageDecoder> m_actualDecoder; 92 93 String m_filenameExtension; 94 IntSize m_size; 95 ImageOrientation m_orientation; 96 int m_repetitionCount; 97 bool m_hasColorProfile; 98 99 Vector<OwnPtr<ImageFrame> > m_lazyDecodedFrames; 100 RefPtr<ImageFrameGenerator> m_frameGenerator; 101 102 static bool s_enabled; 103}; 104 105} // namespace blink 106 107#endif 108