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/*
* 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 "SkCodec.h"
#include "SkColorSpace.h"
#include "SkColorSpaceXform.h"
#include "SkEncodedOrigin.h"
#include "SkImageInfo.h"
#include "SkSwizzler.h"
#include "SkStream.h"
#if __has_include("HeifDecoderAPI.h")
#include "HeifDecoderAPI.h"
#else
#include "SkStubHeifDecoderAPI.h"
#endif
class SkHeifCodec : public SkCodec {
public:
static bool IsHeif(const void*, size_t);
/*
* Assumes IsHeif was called and returned true.
*/
static std::unique_ptr<SkCodec> MakeFromStream(std::unique_ptr<SkStream>, Result*);
protected:
Result onGetPixels(
const SkImageInfo& dstInfo,
void* dst, size_t dstRowBytes,
const Options& options,
int* rowsDecoded) override;
SkEncodedImageFormat onGetEncodedFormat() const override {
return SkEncodedImageFormat::kHEIF;
}
bool conversionSupported(const SkImageInfo&, SkColorType, bool,
const SkColorSpace*) const override {
// This class checks for conversion after creating colorXform.
return true;
}
private:
/*
* Creates an instance of the decoder
* Called only by NewFromStream
*/
SkHeifCodec(int width, int height, const SkEncodedInfo&,
HeifDecoder*, sk_sp<SkColorSpace>, SkEncodedOrigin);
/*
* Checks if the conversion between the input image and the requested output
* image has been implemented.
*
* Sets the output color format.
*/
bool setOutputColorFormat(const SkImageInfo& dst);
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;
SkAutoTMalloc<uint8_t> fStorage;
uint8_t* fSwizzleSrcRow;
uint32_t* fColorXformSrcRow;
std::unique_ptr<SkSwizzler> fSwizzler;
typedef SkCodec INHERITED;
};
#endif // SkHeifCodec_DEFINED
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