/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkHeifCodec_DEFINED
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#define SkHeifCodec_DEFINED
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#include "SkCodec.h"
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#include "SkEncodedOrigin.h"
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#include "SkImageInfo.h"
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#include "SkSwizzler.h"
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#include "SkStream.h"
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#if __has_include("HeifDecoderAPI.h")
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#include "HeifDecoderAPI.h"
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#else
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#include "SkStubHeifDecoderAPI.h"
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#endif
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class SkHeifCodec : public SkCodec {
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public:
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static bool IsHeif(const void*, size_t);
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/*
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* Assumes IsHeif was called and returned true.
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*/
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static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*);
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protected:
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Result onGetPixels(
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const SkImageInfo& dstInfo,
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void* dst, size_t dstRowBytes,
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const Options& options,
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int* rowsDecoded) override;
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SkEncodedImageFormat onGetEncodedFormat() const override {
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return SkEncodedImageFormat::kHEIF;
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}
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bool conversionSupported(const SkImageInfo&, bool, bool) override;
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bool onRewind() override;
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private:
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/*
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* Creates an instance of the decoder
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* Called only by NewFromStream
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*/
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SkHeifCodec(SkEncodedInfo&&, HeifDecoder*, SkEncodedOrigin);
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void initializeSwizzler(const SkImageInfo& dstInfo, const Options& options);
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void allocateStorage(const SkImageInfo& dstInfo);
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int readRows(const SkImageInfo& dstInfo, void* dst,
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size_t rowBytes, int count, const Options&);
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/*
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* Scanline decoding.
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*/
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SkSampler* getSampler(bool createIfNecessary) override;
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Result onStartScanlineDecode(const SkImageInfo& dstInfo,
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const Options& options) override;
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int onGetScanlines(void* dst, int count, size_t rowBytes) override;
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bool onSkipScanlines(int count) override;
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std::unique_ptr<HeifDecoder> fHeifDecoder;
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HeifFrameInfo fFrameInfo;
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SkAutoTMalloc<uint8_t> fStorage;
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uint8_t* fSwizzleSrcRow;
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uint32_t* fColorXformSrcRow;
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std::unique_ptr<SkSwizzler> fSwizzler;
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typedef SkCodec INHERITED;
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};
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#endif // SkHeifCodec_DEFINED
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