1 /* 2 * Copyright (C) 2010 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 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 14 * its contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef WEBPImageDecoder_h 30 #define WEBPImageDecoder_h 31 32 #include "platform/image-decoders/ImageDecoder.h" 33 34 #include "webp/decode.h" 35 #include "webp/demux.h" 36 37 namespace blink { 38 39 class PLATFORM_EXPORT WEBPImageDecoder : public ImageDecoder { 40 public: 41 WEBPImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes); 42 virtual ~WEBPImageDecoder(); 43 44 virtual String filenameExtension() const OVERRIDE { return "webp"; } 45 virtual bool isSizeAvailable() OVERRIDE; 46 virtual bool hasColorProfile() const OVERRIDE { return m_hasColorProfile; } 47 virtual size_t frameCount() OVERRIDE; 48 virtual ImageFrame* frameBufferAtIndex(size_t) OVERRIDE; 49 virtual void setData(SharedBuffer* data, bool allDataReceived) OVERRIDE; 50 virtual int repetitionCount() const OVERRIDE; 51 virtual bool frameIsCompleteAtIndex(size_t) const OVERRIDE; 52 virtual float frameDurationAtIndex(size_t) const OVERRIDE; 53 virtual size_t clearCacheExceptFrame(size_t) OVERRIDE; 54 55 private: 56 bool decode(const uint8_t* dataBytes, size_t dataSize, bool onlySize, size_t frameIndex); 57 58 WebPIDecoder* m_decoder; 59 WebPDecBuffer m_decoderBuffer; 60 int m_formatFlags; 61 bool m_frameBackgroundHasAlpha; 62 bool m_hasColorProfile; 63 64 #if USE(QCMSLIB) 65 qcms_transform* colorTransform() const { return m_transform; } 66 bool createColorTransform(const char* data, size_t); 67 void clearColorTransform(); 68 void readColorProfile(); 69 70 bool m_haveReadProfile; 71 qcms_transform* m_transform; 72 #endif 73 74 bool updateDemuxer(); 75 bool initFrameBuffer(size_t frameIndex); 76 void applyPostProcessing(size_t frameIndex); 77 virtual void clearFrameBuffer(size_t frameIndex) OVERRIDE; 78 79 WebPDemuxer* m_demux; 80 WebPDemuxState m_demuxState; 81 bool m_haveAlreadyParsedThisData; 82 bool m_haveReadAnimationParameters; 83 int m_repetitionCount; 84 int m_decodedHeight; 85 86 typedef void (*AlphaBlendFunction)(ImageFrame&, ImageFrame&, int, int, int); 87 AlphaBlendFunction m_blendFunction; 88 89 void clear(); 90 void clearDecoder(); 91 }; 92 93 } // namespace blink 94 95 #endif 96
