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 "platform/PlatformExport.h" 31 #include "platform/geometry/IntSize.h" 32 #include "platform/graphics/ImageFrameGenerator.h" 33 #include "platform/graphics/ImageSource.h" 34 #include "platform/image-decoders/ImageDecoder.h" 35 #include "wtf/Forward.h" 36 #include "wtf/OwnPtr.h" 37 #include "wtf/Vector.h" 38 39 namespace WebCore { 40 41 class ImageFrameGenerator; 42 class SharedBuffer; 43 44 class PLATFORM_EXPORT DeferredImageDecoder { 45 WTF_MAKE_NONCOPYABLE(DeferredImageDecoder); 46 public: 47 ~DeferredImageDecoder(); 48 static PassOwnPtr<DeferredImageDecoder> create(const SharedBuffer& data, ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption); 49 50 static PassOwnPtr<DeferredImageDecoder> createForTesting(PassOwnPtr<ImageDecoder>); 51 52 static bool isLazyDecoded(const SkBitmap&); 53 54 static void setEnabled(bool); 55 static bool enabled(); 56 57 String filenameExtension() const; 58 59 ImageFrame* frameBufferAtIndex(size_t index); 60 61 void setData(SharedBuffer& data, bool allDataReceived); 62 63 bool isSizeAvailable(); 64 bool hasColorProfile() const; 65 IntSize size() const; 66 IntSize frameSizeAtIndex(size_t index) const; 67 size_t frameCount(); 68 int repetitionCount() const; 69 size_t clearCacheExceptFrame(size_t); 70 bool frameHasAlphaAtIndex(size_t index) const; 71 bool frameIsCompleteAtIndex(size_t) const; 72 float frameDurationAtIndex(size_t) const; 73 unsigned frameBytesAtIndex(size_t index) const; 74 ImageOrientation orientation() const; 75 bool hotSpot(IntPoint&) const; 76 77 // For testing. frameGenerator()78 ImageFrameGenerator* frameGenerator() { return m_frameGenerator.get(); } 79 80 private: 81 explicit DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder); 82 void prepareLazyDecodedFrames(); 83 SkBitmap createBitmap(size_t index); 84 void activateLazyDecoding(); 85 86 RefPtr<SharedBuffer> m_data; 87 bool m_allDataReceived; 88 unsigned m_lastDataSize; 89 bool m_dataChanged; 90 OwnPtr<ImageDecoder> m_actualDecoder; 91 92 String m_filenameExtension; 93 IntSize m_size; 94 ImageOrientation m_orientation; 95 int m_repetitionCount; 96 bool m_hasColorProfile; 97 98 Vector<OwnPtr<ImageFrame> > m_lazyDecodedFrames; 99 RefPtr<ImageFrameGenerator> m_frameGenerator; 100 101 static bool s_enabled; 102 }; 103 104 } // namespace WebCore 105 106 #endif 107