michael@0: 
michael@0: /*
michael@0:  * Copyright 2012 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0:  #ifndef SkTwoPointRadialGradient_DEFINED
michael@0:  #define SkTwoPointRadialGradient_DEFINED
michael@0: 
michael@0:  #include "SkGradientShaderPriv.h"
michael@0: 
michael@0: class SkTwoPointRadialGradient : public SkGradientShaderBase {
michael@0: public:
michael@0:     SkTwoPointRadialGradient(const SkPoint& start, SkScalar startRadius,
michael@0:                               const SkPoint& end, SkScalar endRadius,
michael@0:                               const Descriptor&);
michael@0: 
michael@0:     virtual BitmapType asABitmap(SkBitmap* bitmap,
michael@0:                                  SkMatrix* matrix,
michael@0:                                  TileMode* xy) const SK_OVERRIDE;
michael@0:     virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE;
michael@0:     virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const SK_OVERRIDE;
michael@0: 
michael@0:     virtual void shadeSpan(int x, int y, SkPMColor* dstCParam,
michael@0:                            int count) SK_OVERRIDE;
michael@0:     virtual bool setContext(const SkBitmap& device,
michael@0:                             const SkPaint& paint,
michael@0:                             const SkMatrix& matrix) SK_OVERRIDE;
michael@0: 
michael@0:     SkScalar getCenterX1() const { return fDiff.length(); }
michael@0:     SkScalar getStartRadius() const { return fStartRadius; }
michael@0:     SkScalar getDiffRadius() const { return fDiffRadius; }
michael@0: 
michael@0:     SK_TO_STRING_OVERRIDE()
michael@0:     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient)
michael@0: 
michael@0: protected:
michael@0:     SkTwoPointRadialGradient(SkReadBuffer& buffer);
michael@0:     virtual void flatten(SkWriteBuffer& buffer) const SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     typedef SkGradientShaderBase INHERITED;
michael@0:     const SkPoint fCenter1;
michael@0:     const SkPoint fCenter2;
michael@0:     const SkScalar fRadius1;
michael@0:     const SkScalar fRadius2;
michael@0:     SkPoint fDiff;
michael@0:     SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA;
michael@0: 
michael@0:     void init();
michael@0: };
michael@0: 
michael@0: #endif