Potentially optimize some GrGLEffects for known input color values

src/effects/gradients/SkTwoPointRadialGradient.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
  #include "SkTwoPointRadialGradient.h"
 
@@ skipping 370 matching lines @@
 
 public:
 
     GrGLRadial2Gradient(const GrBackendEffectFactory& factory, const GrDrawEffect&);
     virtual ~GrGLRadial2Gradient() { }
 
     virtual void emitCode(GrGLShaderBuilder*,
                           const GrDrawEffect&,
                           EffectKey,
                           const char* outputColor,
-                          const char* inputColor,
+                          const GrGLSLExpr4& inputColor,
                           const TransformedCoordsArray&,
                           const TextureSamplerArray&) SK_OVERRIDE;
     virtual void setData(const GrGLUniformManager&, const GrDrawEffect&) SK_OVERRIDE;
 
     static EffectKey GenKey(const GrDrawEffect&, const GrGLCaps& caps);
 
 protected:
 
     UniformHandle fParamUni;
 
@@ skipping 133 matching lines @@
     , fCachedPosRoot(0) {
 
     const GrRadial2Gradient& data = drawEffect.castEffect<GrRadial2Gradient>();
     fIsDegenerate = data.isDegenerate();
 }
 
 void GrGLRadial2Gradient::emitCode(GrGLShaderBuilder* builder,
                                    const GrDrawEffect& drawEffect,
                                    EffectKey key,
                                    const char* outputColor,
-                                   const char* inputColor,
+                                   const GrGLSLExpr4& inputColor,
                                    const TransformedCoordsArray& coords,
                                    const TextureSamplerArray& samplers) {
 
     this->emitUniforms(builder, key);
     fParamUni = builder->addUniformArray(GrGLShaderBuilder::kFragment_Visibility,
                                          kFloat_GrSLType, "Radial2FSParams", 6);
 
     SkString cName("c");
     SkString ac4Name("ac4");
     SkString rootName("root");
@@ skipping 126 matching lines @@
 }
 
 #else
 
 GrEffectRef* SkTwoPointRadialGradient::asNewEffect(GrContext*, const SkPaint&) const {
     SkDEBUGFAIL("Should not call in GPU-less build");
     return NULL;
 }
 
 #endif