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/*
* Copyright 2006 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkComposeShader_DEFINED
#define SkComposeShader_DEFINED
#include "SkShaderBase.h"
#include "SkBlendMode.h"
class SkComposeShader final : public SkShaderBase {
public:
SkComposeShader(sk_sp<SkShader> dst, sk_sp<SkShader> src, SkBlendMode mode, float lerpT)
: fDst(std::move(dst))
, fSrc(std::move(src))
, fLerpT(lerpT)
, fMode(mode)
{
SkASSERT(lerpT >= 0 && lerpT <= 1);
}
#if SK_SUPPORT_GPU
std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs&) const override;
#endif
#ifdef SK_DEBUGx
SkShader* getShaderA() { return fShaderA.get(); }
SkShader* getShaderB() { return fShaderB.get(); }
#endif
#ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK
bool asACompose(ComposeRec* rec) const override;
#endif
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkComposeShader)
protected:
SkComposeShader(SkReadBuffer&);
void flatten(SkWriteBuffer&) const override;
sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
bool onAppendStages(const StageRec&) const override;
private:
sk_sp<SkShader> fDst;
sk_sp<SkShader> fSrc;
const float fLerpT;
const SkBlendMode fMode;
bool isJustMode() const { return fLerpT == 1; }
bool isJustLerp() const { return fMode == SkBlendMode::kSrc; }
typedef SkShaderBase INHERITED;
};
#endif
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