1 2 /* 3 * Copyright 2012 Google Inc. 4 * 5 * Use of this source code is governed by a BSD-style license that can be 6 * found in the LICENSE file. 7 */ 8 9 #ifndef SkTwoPointRadialGradient_DEFINED 10 #define SkTwoPointRadialGradient_DEFINED 11 12 #include "SkGradientShaderPriv.h" 13 14 class SkTwoPointRadialGradient : public SkGradientShaderBase { 15 public: 16 SkTwoPointRadialGradient(const SkPoint& start, SkScalar startRadius, 17 const SkPoint& end, SkScalar endRadius, 18 const SkColor colors[], const SkScalar pos[], 19 int colorCount, SkShader::TileMode mode, 20 SkUnitMapper* mapper); 21 22 virtual BitmapType asABitmap(SkBitmap* bitmap, 23 SkMatrix* matrix, 24 TileMode* xy) const SK_OVERRIDE; 25 virtual GradientType asAGradient(GradientInfo* info) const SK_OVERRIDE; 26 virtual GrEffectRef* asNewEffect(GrContext* context, const SkPaint&) const SK_OVERRIDE; 27 28 virtual void shadeSpan(int x, int y, SkPMColor* dstCParam, 29 int count) SK_OVERRIDE; 30 virtual bool setContext(const SkBitmap& device, 31 const SkPaint& paint, 32 const SkMatrix& matrix) SK_OVERRIDE; 33 34 SkScalar getCenterX1() const { return fDiff.length(); } 35 SkScalar getStartRadius() const { return fStartRadius; } 36 SkScalar getDiffRadius() const { return fDiffRadius; } 37 38 SK_DEVELOPER_TO_STRING() 39 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointRadialGradient) 40 41 protected: 42 SkTwoPointRadialGradient(SkFlattenableReadBuffer& buffer); 43 virtual void flatten(SkFlattenableWriteBuffer& buffer) const SK_OVERRIDE; 44 45 private: 46 typedef SkGradientShaderBase INHERITED; 47 const SkPoint fCenter1; 48 const SkPoint fCenter2; 49 const SkScalar fRadius1; 50 const SkScalar fRadius2; 51 SkPoint fDiff; 52 SkScalar fStartRadius, fDiffRadius, fSr2D2, fA, fOneOverTwoA; 53 54 void init(); 55 }; 56 57 #endif 58
