Add isSingleComponent bool to getConstantColorComponent

src/effects/SkDisplacementMapEffect.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 "SkDisplacementMapEffect.h"
 #include "SkReadBuffer.h"
 #include "SkWriteBuffer.h"
@@ skipping 333 matching lines @@
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
     SkDisplacementMapEffect::ChannelSelectorType xChannelSelector() const
         { return fXChannelSelector; }
     SkDisplacementMapEffect::ChannelSelectorType yChannelSelector() const
         { return fYChannelSelector; }
     const SkVector& scale() const { return fScale; }
 
     typedef GrGLDisplacementMapEffect GLProcessor;
     static const char* Name() { return "DisplacementMap"; }
 
-    virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
-
 private:
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onGetConstantColorComponents(GrColor* color, uint32_t* validFlags,
+                                              bool* isSingleComponent) const SK_OVERRIDE;
+
     GrDisplacementMapEffect(SkDisplacementMapEffect::ChannelSelectorType xChannelSelector,
                             SkDisplacementMapEffect::ChannelSelectorType yChannelSelector,
                             const SkVector& scale,
                             GrTexture* displacement, const SkMatrix& offsetMatrix,
                             GrTexture* color);
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     GrCoordTransform            fDisplacementTransform;
     GrTextureAccess             fDisplacementAccess;
@@ skipping 115 matching lines @@
            fColorAccess.getTexture() == s.fColorAccess.getTexture() &&
            fXChannelSelector == s.fXChannelSelector &&
            fYChannelSelector == s.fYChannelSelector &&
            fScale == s.fScale;
 }
 
 const GrBackendFragmentProcessorFactory& GrDisplacementMapEffect::getFactory() const {
     return GrTBackendFragmentProcessorFactory<GrDisplacementMapEffect>::getInstance();
 }
 
-void GrDisplacementMapEffect::getConstantColorComponents(GrColor*,
-                                                         uint32_t* validFlags) const {
+void GrDisplacementMapEffect::onGetConstantColorComponents(GrColor*, uint32_t* validFlags,
+                                                           bool* isSingleComponent) const {
     // Any displacement offset bringing a pixel out of bounds will output a color of (0,0,0,0),
     // so the only way we'd get a constant alpha is if the input color image has a constant alpha
     // and no displacement offset push any texture coordinates out of bounds OR if the constant
     // alpha is 0. Since this isn't trivial to compute at this point, let's assume the output is
     // not of constant color when a displacement effect is applied.
     *validFlags = 0;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ skipping 126 matching lines @@
 void GrGLDisplacementMapEffect::GenKey(const GrProcessor& proc,
                                        const GrGLCaps&, GrProcessorKeyBuilder* b) {
     const GrDisplacementMapEffect& displacementMap = proc.cast<GrDisplacementMapEffect>();
 
     uint32_t xKey = displacementMap.xChannelSelector();
     uint32_t yKey = displacementMap.yChannelSelector() << kChannelSelectorKeyBits;
 
     b->add32(xKey | yKey);
 }
 #endif