| |
| /* |
| * 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 "SkGradientShaderPriv.h" |
| |
| // TODO(dominikg): Worth making it truly immutable (i.e. set values in constructor)? |
| // Should only be initialized once via init(). Immutable afterwards. |
| struct TwoPtRadial { |
| enum { |
| // This value is outside the range SK_FixedMin to SK_FixedMax. |
| kDontDrawT = 0x80000000 |
| }; |
| |
| float fCenterX, fCenterY; |
| float fDCenterX, fDCenterY; |
| float fRadius; |
| float fDRadius; |
| float fA; |
| float fRadius2; |
| float fRDR; |
| bool fFlipped; |
| |
| void init(const SkPoint& center0, SkScalar rad0, |
| const SkPoint& center1, SkScalar rad1, |
| bool flipped); |
| |
| static bool DontDrawT(SkFixed t) { |
| return kDontDrawT == (uint32_t)t; |
| } |
| }; |
| |
| |
| class SkTwoPointConicalGradient : public SkGradientShaderBase { |
| TwoPtRadial fRec; |
| public: |
| SkTwoPointConicalGradient(const SkPoint& start, SkScalar startRadius, |
| const SkPoint& end, SkScalar endRadius, |
| bool flippedGrad, const Descriptor&); |
| |
| class TwoPointConicalGradientContext : public SkGradientShaderBase::GradientShaderBaseContext { |
| public: |
| TwoPointConicalGradientContext(const SkTwoPointConicalGradient&, const ContextRec&); |
| ~TwoPointConicalGradientContext() {} |
| |
| void shadeSpan(int x, int y, SkPMColor dstC[], int count) override; |
| |
| private: |
| typedef SkGradientShaderBase::GradientShaderBaseContext INHERITED; |
| }; |
| |
| SkShader::GradientType asAGradient(GradientInfo* info) const override; |
| #if SK_SUPPORT_GPU |
| const GrFragmentProcessor* asFragmentProcessor(GrContext*, |
| const SkMatrix&, |
| const SkMatrix*, |
| SkFilterQuality) 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; } |
| bool isFlippedGrad() const { return fFlippedGrad; } |
| |
| SK_TO_STRING_OVERRIDE() |
| SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTwoPointConicalGradient) |
| |
| protected: |
| SkTwoPointConicalGradient(SkReadBuffer& buffer); |
| void flatten(SkWriteBuffer& buffer) const override; |
| size_t onContextSize(const ContextRec&) const override; |
| Context* onCreateContext(const ContextRec&, void* storage) const override; |
| |
| private: |
| SkPoint fCenter1; |
| SkPoint fCenter2; |
| SkScalar fRadius1; |
| SkScalar fRadius2; |
| bool fFlippedGrad; |
| |
| friend class SkGradientShader; |
| typedef SkGradientShaderBase INHERITED; |
| }; |
| |
| #endif |