| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkTwoPointConicalGradient_gpu_DEFINED |
| #define SkTwoPointConicalGradient_gpu_DEFINED |
| |
| #if SK_SUPPORT_GPU |
| |
| #include "SkGradientShaderPriv.h" |
| |
| class GrEffectRef; |
| class SkTwoPointConicalGradient; |
| class GrGL2PtConicalGradientEffect; |
| |
| class Gr2PtConicalGradientEffect : public GrGradientEffect { |
| public: |
| |
| static GrEffectRef* Create(GrContext* ctx, |
| const SkTwoPointConicalGradient& shader, |
| const SkMatrix& matrix, |
| SkShader::TileMode tm) { |
| AutoEffectUnref effect(SkNEW_ARGS(Gr2PtConicalGradientEffect, (ctx, shader, matrix, tm))); |
| return CreateEffectRef(effect); |
| } |
| |
| virtual ~Gr2PtConicalGradientEffect() { } |
| |
| static const char* Name() { return "Two-Point Conical Gradient"; } |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| |
| // The radial gradient parameters can collapse to a linear (instead of quadratic) equation. |
| bool isDegenerate() const { return SkScalarAbs(fDiffRadius) == SkScalarAbs(fCenterX1); } |
| SkScalar center() const { return fCenterX1; } |
| SkScalar diffRadius() const { return fDiffRadius; } |
| SkScalar radius() const { return fRadius0; } |
| |
| typedef GrGL2PtConicalGradientEffect GLEffect; |
| |
| private: |
| virtual bool onIsEqual(const GrEffect& sBase) const SK_OVERRIDE { |
| const Gr2PtConicalGradientEffect& s = CastEffect<Gr2PtConicalGradientEffect>(sBase); |
| return (INHERITED::onIsEqual(sBase) && |
| this->fCenterX1 == s.fCenterX1 && |
| this->fRadius0 == s.fRadius0 && |
| this->fDiffRadius == s.fDiffRadius); |
| } |
| |
| Gr2PtConicalGradientEffect(GrContext* ctx, |
| const SkTwoPointConicalGradient& shader, |
| const SkMatrix& matrix, |
| SkShader::TileMode tm); |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| // @{ |
| // Cache of values - these can change arbitrarily, EXCEPT |
| // we shouldn't change between degenerate and non-degenerate?! |
| |
| GrCoordTransform fBTransform; |
| SkScalar fCenterX1; |
| SkScalar fRadius0; |
| SkScalar fDiffRadius; |
| |
| // @} |
| |
| typedef GrGradientEffect INHERITED; |
| }; |
| #endif |
| #endif |