| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkHeifCodec_DEFINED |
| #define SkHeifCodec_DEFINED |
| |
| #include "include/codec/SkCodec.h" |
| #include "include/codec/SkEncodedOrigin.h" |
| #include "include/core/SkImageInfo.h" |
| #include "include/core/SkStream.h" |
| #include "src/codec/SkFrameHolder.h" |
| #include "src/codec/SkSwizzler.h" |
| |
| #if __has_include("HeifDecoderAPI.h") |
| #include "HeifDecoderAPI.h" |
| #else |
| #include "src/codec/SkStubHeifDecoderAPI.h" |
| #endif |
| |
| class SkHeifCodec : public SkCodec { |
| public: |
| /* |
| * Returns true if one of kHEIF or kAVIF images were detected. If |format| |
| * is not nullptr, it will contain the detected format. Returns false |
| * otherwise. |
| */ |
| static bool IsSupported(const void*, size_t, SkEncodedImageFormat* format); |
| |
| /* |
| * Assumes IsSupported was called and it returned a non-nullopt value. |
| */ |
| static std::unique_ptr<SkCodec> MakeFromStream( |
| std::unique_ptr<SkStream>, SkCodec::SelectionPolicy selectionPolicy, |
| SkEncodedImageFormat, Result*); |
| |
| protected: |
| |
| Result onGetPixels( |
| const SkImageInfo& dstInfo, |
| void* dst, size_t dstRowBytes, |
| const Options& options, |
| int* rowsDecoded) override; |
| |
| SkEncodedImageFormat onGetEncodedFormat() const override { |
| return fFormat; |
| } |
| |
| int onGetFrameCount() override; |
| bool onGetFrameInfo(int, FrameInfo*) const override; |
| int onGetRepetitionCount() override; |
| const SkFrameHolder* getFrameHolder() const override { |
| return &fFrameHolder; |
| } |
| |
| bool conversionSupported(const SkImageInfo&, bool, bool) override; |
| |
| bool onRewind() override; |
| |
| private: |
| /* |
| * Creates an instance of the decoder |
| * Called only by NewFromStream |
| */ |
| SkHeifCodec(SkEncodedInfo&&, HeifDecoder*, SkEncodedOrigin, bool animation, |
| SkEncodedImageFormat); |
| |
| void initializeSwizzler(const SkImageInfo& dstInfo, const Options& options); |
| void allocateStorage(const SkImageInfo& dstInfo); |
| int readRows(const SkImageInfo& dstInfo, void* dst, |
| size_t rowBytes, int count, const Options&); |
| |
| /* |
| * Scanline decoding. |
| */ |
| SkSampler* getSampler(bool createIfNecessary) override; |
| Result onStartScanlineDecode(const SkImageInfo& dstInfo, |
| const Options& options) override; |
| int onGetScanlines(void* dst, int count, size_t rowBytes) override; |
| bool onSkipScanlines(int count) override; |
| |
| std::unique_ptr<HeifDecoder> fHeifDecoder; |
| HeifFrameInfo fFrameInfo; |
| skia_private::AutoTMalloc<uint8_t> fStorage; |
| uint8_t* fSwizzleSrcRow; |
| uint32_t* fColorXformSrcRow; |
| |
| std::unique_ptr<SkSwizzler> fSwizzler; |
| bool fUseAnimation; |
| const SkEncodedImageFormat fFormat; |
| |
| class Frame : public SkFrame { |
| public: |
| Frame(int i) : INHERITED(i) {} |
| |
| protected: |
| SkEncodedInfo::Alpha onReportedAlpha() const override { |
| return SkEncodedInfo::Alpha::kOpaque_Alpha; |
| } |
| |
| private: |
| using INHERITED = SkFrame; |
| }; |
| |
| class FrameHolder : public SkFrameHolder { |
| public: |
| ~FrameHolder() override {} |
| void setScreenSize(int w, int h) { |
| fScreenWidth = w; |
| fScreenHeight = h; |
| } |
| Frame* appendNewFrame(); |
| const Frame* frame(int i) const; |
| Frame* editFrameAt(int i); |
| int size() const { |
| return static_cast<int>(fFrames.size()); |
| } |
| void reserve(int size) { |
| fFrames.reserve(size); |
| } |
| |
| protected: |
| const SkFrame* onGetFrame(int i) const override; |
| |
| private: |
| std::vector<Frame> fFrames; |
| }; |
| |
| FrameHolder fFrameHolder; |
| using INHERITED = SkCodec; |
| }; |
| |
| #endif // SkHeifCodec_DEFINED |