Add isSingleComponent bool to getConstantColorComponent

src/gpu/effects/GrMatrixConvolutionEffect.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrMatrixConvolutionEffect_DEFINED
 #define GrMatrixConvolutionEffect_DEFINED
 
@@ skipping 34 matching lines @@
                                                SkScalar gain,
                                                SkScalar bias,
                                                const SkIPoint& kernelOffset,
                                                GrTextureDomain::Mode tileMode,
                                                bool convolveAlpha,
                                                SkScalar sigmaX,
                                                SkScalar sigmaY);
 
     virtual ~GrMatrixConvolutionEffect();
 
-    virtual void getConstantColorComponents(GrColor* color,
-                                            uint32_t* validFlags) const SK_OVERRIDE {
-        // TODO: Try to do better?
-        *validFlags = 0;
-    }
-
     static const char* Name() { return "MatrixConvolution"; }
     const SkIRect& bounds() const { return fBounds; }
     const SkISize& kernelSize() const { return fKernelSize; }
     const float* kernelOffset() const { return fKernelOffset; }
     const float* kernel() const { return fKernel; }
     float gain() const { return fGain; }
     float bias() const { return fBias; }
     bool convolveAlpha() const { return fConvolveAlpha; }
     const GrTextureDomain& domain() const { return fDomain; }
 
     typedef GrGLMatrixConvolutionEffect GLProcessor;
 
     virtual const GrBackendFragmentProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
     GrMatrixConvolutionEffect(GrTexture*,
                               const SkIRect& bounds,
                               const SkISize& kernelSize,
                               const SkScalar* kernel,
                               SkScalar gain,
                               SkScalar bias,
                               const SkIPoint& kernelOffset,
                               GrTextureDomain::Mode tileMode,
                               bool convolveAlpha);
 
     virtual bool onIsEqual(const GrProcessor&) const SK_OVERRIDE;
 
+    virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
+        // TODO: Try to do better?
+        inout->fValidFlags = 0;
+        inout->fIsSingleComponent = false;
+    }
+
     SkIRect         fBounds;
     SkISize         fKernelSize;
     float           fKernel[MAX_KERNEL_SIZE];
     float           fGain;
     float           fBias;
     float           fKernelOffset[2];
     bool            fConvolveAlpha;
     GrTextureDomain fDomain;
 
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrSingleTextureEffect INHERITED;
 };
 
 #endif