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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkWebpCodec_DEFINED
#define SkWebpCodec_DEFINED
#include "SkCodec.h"
#include "SkColorSpace.h"
#include "SkEncodedFormat.h"
#include "SkImageInfo.h"
#include "SkTypes.h"
class SkStream;
extern "C" {
struct WebPDemuxer;
void WebPDemuxDelete(WebPDemuxer* dmux);
}
static const size_t WEBP_VP8_HEADER_SIZE = 30;
class SkWebpCodec final : public SkCodec {
public:
// Assumes IsWebp was called and returned true.
static SkCodec* NewFromStream(SkStream*);
static bool IsWebp(const void*, size_t);
protected:
Result onGetPixels(const SkImageInfo&, void*, size_t, const Options&, SkPMColor*, int*, int*)
override;
SkEncodedFormat onGetEncodedFormat() const override { return kWEBP_SkEncodedFormat; }
SkISize onGetScaledDimensions(float desiredScale) const override;
bool onDimensionsSupported(const SkISize&) override;
bool onGetValidSubset(SkIRect* /* desiredSubset */) const override;
private:
SkWebpCodec(int width, int height, const SkEncodedInfo&, sk_sp<SkColorSpace>, SkStream*,
WebPDemuxer*, sk_sp<SkData>);
SkAutoTCallVProc<WebPDemuxer, WebPDemuxDelete> fDemux;
// fDemux has a pointer into this data.
// This should not be freed until the decode is completed.
sk_sp<SkData> fData;
typedef SkCodec INHERITED;
};
#endif // SkWebpCodec_DEFINED
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