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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 SkTwoPointRadialGradient_DEFINED
#define SkTwoPointRadialGradient_DEFINED
#include "SkGradientShaderPriv.h"
class SkTwoPointRadialGradient : public SkGradientShaderBase {
public:
SkTwoPointRadialGradient(const SkPoint& start, SkScalar startRadius,
const SkPoint& end, SkScalar endRadius,
const Descriptor&, const SkMatrix* localMatrix);
virtual BitmapType asABitmap(SkBitmap* bitmap,
SkMatrix* matrix,
TileMode* xy) const SK_OVERRIDE;
virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const SK_OVERRIDE;
virtual size_t contextSize() const SK_OVERRIDE;
virtual bool validContext(const SkBitmap&, const SkPaint&,
const SkMatrix&, SkMatrix* totalInverse = NULL) const SK_OVERRIDE;
virtual SkShader::Context* createContext(const SkBitmap&, const SkPaint&, const SkMatrix&,
void* storage) const SK_OVERRIDE;
class TwoPointRadialGradientContext : public SkGradientShaderBase::GradientShaderBaseContext {
public:
TwoPointRadialGradientContext(const SkTwoPointRadialGradient& shader,
const SkBitmap& device,
const SkPaint& paint,
const SkMatrix& matrix);
~TwoPointRadialGradientContext() {}
virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count) SK_OVERRIDE;
private:
typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED;
};
SkScalar getCenterX1() const { return fDiff.length(); }
SkScalar getStartRadius() const { return fStartRadius; }
SkScalar getDiffRadius() const { return fDiffRadius; }
SK_TO_STRING_OVERRIDE()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient)
protected:
SkTwoPointRadialGradient(SkReadBuffer& buffer);
virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
private:
const SkPoint fCenter1;
const SkPoint fCenter2;
const SkScalar fRadius1;
const SkScalar fRadius2;
SkPoint fDiff;
SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA;
void init();
typedef SkGradientShaderBase INHERITED;
};
#endif
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