Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrDitherEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "GrDitherEffect.h"
 
@@ skipping 12 matching lines @@
     static GrFragmentProcessor* Create() {
         GR_CREATE_STATIC_FRAGMENT_PROCESSOR(gDitherEffect, DitherEffect, ())
         return SkRef(gDitherEffect);
     }
 
     virtual ~DitherEffect() {};
     static const char* Name() { return "Dither"; }
 
     typedef GLDitherEffect GLProcessor;
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE {
         return GrTBackendFragmentProcessorFactory<DitherEffect>::getInstance();
     }
 
 private:
     DitherEffect() {
         this->setWillReadFragmentPosition();
     }
 
     // All dither effects are equal
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE { return true; }
 
+    virtual void onComputeInvarientOutput(InvarientOutput* invarientOutput) const SK_OVERRIDE;
+
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
-void DitherEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
-    *validFlags = 0;
+void DitherEffect::onComputeInvarientOutput(InvarientOutput* invarientOutput) const {
+    invarientOutput->validFlags = 0;
+    invarientOutput->isSingleComponent = false;
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(DitherEffect);
 
 GrFragmentProcessor* DitherEffect::TestCreate(SkRandom*,
                                               GrContext*,
                                               const GrDrawTargetCaps&,
                                               GrTexture*[]) {
@@ skipping 43 matching lines @@
     fsBuilder->codeAppendf("\t\tfloat r = "
                            "fract(sin(dot(%s.xy ,vec2(12.9898,78.233))) * 43758.5453);\n",
                            fsBuilder->fragmentPosition());
     fsBuilder->codeAppendf("\t\t%s = (1.0/255.0) * vec4(r, r, r, r) + %s;\n",
                            outputColor, GrGLSLExpr4(inputColor).c_str());
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GrFragmentProcessor* GrDitherEffect::Create() { return DitherEffect::Create(); }