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29 #ifndef WEBPImageDecoder_h
30 #define WEBPImageDecoder_h
32 #include "platform/image-decoders/ImageDecoder.h"
34 #include "webp/decode.h"
35 #include "webp/demux.h"
39 class PLATFORM_EXPORT WEBPImageDecoder : public ImageDecoder {
41 WEBPImageDecoder(ImageSource::AlphaOption, ImageSource::GammaAndColorProfileOption, size_t maxDecodedBytes);
42 virtual ~WEBPImageDecoder();
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;
56 bool decode(const uint8_t* dataBytes, size_t dataSize, bool onlySize, size_t frameIndex);
58 WebPIDecoder* m_decoder;
59 WebPDecBuffer m_decoderBuffer;
61 bool m_frameBackgroundHasAlpha;
62 bool m_hasColorProfile;
65 qcms_transform* colorTransform() const { return m_transform; }
66 bool createColorTransform(const char* data, size_t);
67 void clearColorTransform();
68 void readColorProfile();
70 bool m_haveReadProfile;
71 qcms_transform* m_transform;
75 bool initFrameBuffer(size_t frameIndex);
76 void applyPostProcessing(size_t frameIndex);
77 virtual void clearFrameBuffer(size_t frameIndex) override;
80 WebPDemuxState m_demuxState;
81 bool m_haveAlreadyParsedThisData;
82 bool m_haveReadAnimationParameters;
83 int m_repetitionCount;
86 typedef void (*AlphaBlendFunction)(ImageFrame&, ImageFrame&, int, int, int);
87 AlphaBlendFunction m_blendFunction;