Add isSingleComponent bool to getConstantColorComponent

src/effects/SkArithmeticMode.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkArithmeticMode.h"
 #include "SkColorPriv.h"
 #include "SkReadBuffer.h"
@@ skipping 271 matching lines @@
     }
 
     virtual ~GrArithmeticEffect();
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
     typedef GrGLArithmeticEffect GLProcessor;
     static const char* Name() { return "Arithmetic"; }
     GrTexture* backgroundTexture() const { return fBackgroundAccess.getTexture(); }
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
     float k1() const { return fK1; }
     float k2() const { return fK2; }
     float k3() const { return fK3; }
     float k4() const { return fK4; }
     bool enforcePMColor() const { return fEnforcePMColor; }
 
 private:
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE;
+
     GrArithmeticEffect(float k1, float k2, float k3, float k4, bool enforcePMColor,
                        GrTexture* background);
     float                       fK1, fK2, fK3, fK4;
     bool                        fEnforcePMColor;
     GrCoordTransform            fBackgroundTransform;
     GrTextureAccess             fBackgroundAccess;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
     typedef GrFragmentProcessor INHERITED;
 
@@ skipping 24 matching lines @@
            fK3 == s.fK3 &&
            fK4 == s.fK4 &&
            fEnforcePMColor == s.fEnforcePMColor &&
            backgroundTexture() == s.backgroundTexture();
 }
 
 const GrBackendFragmentProcessorFactory& GrArithmeticEffect::getFactory() const {
     return GrTBackendFragmentProcessorFactory<GrArithmeticEffect>::getInstance();
 }
 
-void GrArithmeticEffect::getConstantColorComponents(GrColor* color, uint32_t* validFlags) const {
+void GrArithmeticEffect::onComputeInvariantOutput(InvariantOutput* inout) const {
     // TODO: optimize this
-    *validFlags = 0;
+    inout->fValidFlags = 0;
+    inout->fIsSingleComponent = false;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 GrGLArithmeticEffect::GrGLArithmeticEffect(const GrBackendProcessorFactory& factory,
                                            const GrProcessor&)
    : INHERITED(factory),
      fEnforcePMColor(true) {
 }
 
@@ skipping 92 matching lines @@
                                          background);
     }
     return true;
 }
 
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkArithmeticMode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkArithmeticMode_scalar)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END