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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkNormalMapSource_DEFINED
#define SkNormalMapSource_DEFINED
#include "SkNormalSource.h"
class SkNormalMapSourceImpl : public SkNormalSource {
public:
SkNormalMapSourceImpl(sk_sp<SkShader> mapShader, const SkMatrix& invCTM)
: fMapShader(std::move(mapShader))
, fInvCTM(invCTM) {}
#if SK_SUPPORT_GPU
std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const GrFPArgs& args) const override;
#endif
SkNormalSource::Provider* asProvider(const SkShaderBase::ContextRec& rec,
SkArenaAlloc* alloc) const override;
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkNormalMapSourceImpl)
protected:
void flatten(SkWriteBuffer& buf) const override;
bool computeNormTotalInverse(const SkShaderBase::ContextRec& rec,
SkMatrix* normTotalInverse) const;
private:
class Provider : public SkNormalSource::Provider {
public:
Provider(const SkNormalMapSourceImpl& source, SkShaderBase::Context* mapContext);
void fillScanLine(int x, int y, SkPoint3 output[], int count) const override;
private:
const SkNormalMapSourceImpl& fSource;
SkShaderBase::Context* fMapContext;
typedef SkNormalSource::Provider INHERITED;
};
sk_sp<SkShader> fMapShader;
SkMatrix fInvCTM; // Inverse of the canvas total matrix, used for rotating normals.
friend class SkNormalSource;
typedef SkNormalSource INHERITED;
};
#endif
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