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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 SkColor colors[], const SkScalar pos[],
int colorCount, SkShader::TileMode mode,
SkUnitMapper* mapper);
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 void shadeSpan(int x, int y, SkPMColor* dstCParam,
int count) SK_OVERRIDE;
virtual bool setContext(const SkBitmap& device,
const SkPaint& paint,
const SkMatrix& matrix) SK_OVERRIDE;
SkScalar getCenterX1() const { return fDiff.length(); }
SkScalar getStartRadius() const { return fStartRadius; }
SkScalar getDiffRadius() const { return fDiffRadius; }
SK_DEVELOPER_TO_STRING()
SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient)
protected:
SkTwoPointRadialGradient(SkFlattenableReadBuffer& buffer);
virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE;
private:
typedef SkGradientShaderBase INHERITED;
const SkPoint fCenter1;
const SkPoint fCenter2;
const SkScalar fRadius1;
const SkScalar fRadius2;
SkPoint fDiff;
SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA;
void init();
};
#endif
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