Add isSingleComponent bool to getConstantColorComponent

src/core/SkXfermode.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkXfermode.h"
@@ skipping 781 matching lines @@
     }
 
     static GrFragmentProcessor* Create(SkXfermode::Mode mode, GrTexture* background) {
         if (!IsSupportedMode(mode)) {
             return NULL;
         } else {
             return SkNEW_ARGS(XferEffect, (mode, background));
         }
     }
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
-        *validFlags = 0;
-    }
-
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE {
         return GrTBackendFragmentProcessorFactory<XferEffect>::getInstance();
     }
 
     static const char* Name() { return "XferEffect"; }
 
     SkXfermode::Mode mode() const { return fMode; }
     const GrTextureAccess&  backgroundAccess() const { return fBackgroundAccess; }
 
     class GLProcessor : public GrGLFragmentProcessor {
@@ skipping 392 matching lines @@
             this->addTextureAccess(&fBackgroundAccess);
         } else {
             this->setWillReadDstColor();
         }
     }
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE {
         const XferEffect& s = other.cast<XferEffect>();
         return fMode == s.fMode &&
                fBackgroundAccess.getTexture() == s.fBackgroundAccess.getTexture();
     }
+    
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+        inout->fValidFlags = 0;
+        inout->fIsSingleComponent = false;
+    }
 
     SkXfermode::Mode fMode;
     GrCoordTransform fBackgroundTransform;
     GrTextureAccess  fBackgroundAccess;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(XferEffect);
 GrFragmentProcessor* XferEffect::TestCreate(SkRandom* rand,
@@ skipping 726 matching lines @@
         } else {
             proc16 = rec.fProc16_General;
         }
     }
     return proc16;
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkXfermode)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkProcCoeffXfermode)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END