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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkTwoPointConicalGradient_DEFINED
#define SkTwoPointConicalGradient_DEFINED
#include "SkColorSpaceXformer.h"
#include "SkGradientShaderPriv.h"
class SkTwoPointConicalGradient final : public SkGradientShaderBase {
public:
static sk_sp<SkShader> Create(const SkPoint& start, SkScalar startRadius,
const SkPoint& end, SkScalar endRadius,
const Descriptor&);
SkShader::GradientType asAGradient(GradientInfo* info) const override;
#if SK_SUPPORT_GPU
std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(const AsFPArgs&) const override;
#endif
bool isOpaque() const override;
SkScalar getCenterX1() const { return SkPoint::Distance(fCenter1, fCenter2); }
SkScalar getStartRadius() const { return fRadius1; }
SkScalar getDiffRadius() const { return fRadius2 - fRadius1; }
const SkPoint& getStartCenter() const { return fCenter1; }
const SkPoint& getEndCenter() const { return fCenter2; }
SkScalar getEndRadius() const { return fRadius2; }
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient)
protected:
void flatten(SkWriteBuffer& buffer) const override;
sk_sp<SkShader> onMakeColorSpace(SkColorSpaceXformer* xformer) const override;
void appendGradientStages(SkArenaAlloc* alloc, SkRasterPipeline* tPipeline,
SkRasterPipeline* postPipeline) const override;
bool onIsRasterPipelineOnly(const SkMatrix&) const override { return true; }
private:
enum class Type {
kRadial,
kTwoPoint,
};
SkTwoPointConicalGradient(const SkPoint& c0, SkScalar r0,
const SkPoint& c1, SkScalar r1,
const Descriptor&, Type, const SkMatrix&);
SkPoint fCenter1;
SkPoint fCenter2;
SkScalar fRadius1;
SkScalar fRadius2;
Type fType;
friend class SkGradientShader;
typedef SkGradientShaderBase INHERITED;
};
#endif
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