/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef mozilla_image_decoders_nsWebPDecoder_h #define mozilla_image_decoders_nsWebPDecoder_h #include "Decoder.h" #include "webp/demux.h" #include "StreamingLexer.h" #include "SurfacePipe.h" namespace mozilla { namespace image { class RasterImage; class nsWebPDecoder final : public Decoder { public: virtual ~nsWebPDecoder(); protected: LexerResult DoDecode(SourceBufferIterator& aIterator, IResumable* aOnResume) override; private: friend class DecoderFactory; // Decoders should only be instantiated via DecoderFactory. explicit nsWebPDecoder(RasterImage* aImage); void ApplyColorProfile(const char* aProfile, size_t aLength); LexerResult UpdateBuffer(SourceBufferIterator& aIterator, SourceBufferIterator::State aState); LexerResult ReadData(); LexerResult ReadHeader(WebPDemuxer* aDemuxer, bool aIsComplete); LexerResult ReadPayload(WebPDemuxer* aDemuxer, bool aIsComplete); nsresult CreateFrame(const nsIntRect& aFrameRect); void EndFrame(); LexerResult ReadSingle(const uint8_t* aData, size_t aLength, const IntRect& aFrameRect); LexerResult ReadMultiple(WebPDemuxer* aDemuxer, bool aIsComplete); /// The SurfacePipe used to write to the output surface. SurfacePipe mPipe; /// The buffer used to accumulate data until the complete WebP header is /// received, if and only if the iterator is discontiguous. Vector<uint8_t> mBufferedData; /// The libwebp output buffer descriptor pointing to the decoded data. WebPDecBuffer mBuffer; /// The libwebp incremental decoder descriptor, wraps mBuffer. WebPIDecoder* mDecoder; /// Blend method for the current frame. BlendMethod mBlend; /// Disposal method for the current frame. DisposalMethod mDisposal; /// Frame timeout for the current frame; FrameTimeout mTimeout; /// Surface format for the current frame. gfx::SurfaceFormat mFormat; /// Frame rect for the current frame. IntRect mFrameRect; /// The last row of decoded pixels written to mPipe. int mLastRow; /// Number of decoded frames. uint32_t mCurrentFrame; /// Pointer to the start of the contiguous encoded image data. const uint8_t* mData; /// Length of data pointed to by mData. size_t mLength; /// True if the iterator has reached its end. bool mIteratorComplete; /// True if this decoding pass requires a WebPDemuxer. bool mNeedDemuxer; /// True if we have setup the color profile for the image. bool mGotColorProfile; /// Color management profile from the ICCP chunk in the image. qcms_profile* mInProfile; /// Color management transform to apply to image data. qcms_transform* mTransform; }; } // namespace image } // namespace mozilla #endif // mozilla_image_decoders_nsWebPDecoder_h