Create helper functions to use in computeInvariantOutput calls

src/gpu/effects/GrBezierEffect.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrBezierEffect_DEFINED
 #define GrBezierEffect_DEFINED
 
@@ skipping 87 matching lines @@
     typedef GrGLConicEffect GLProcessor;
 
     virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
     GrConicEffect(GrPrimitiveEdgeType);
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
     virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
-        inout->fValidFlags = 0;
-        inout->fIsSingleComponent = false;
+        inout->mulByUnknownAlpha();
     }
 
     GrPrimitiveEdgeType   fEdgeType;
     const GrShaderVar& fInConicCoeffs;
 
     GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
 
     typedef GrGeometryProcessor INHERITED;
 };
 
@@ skipping 51 matching lines @@
     typedef GrGLQuadEffect GLProcessor;
 
     virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
     GrQuadEffect(GrPrimitiveEdgeType);
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
     virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
-        inout->fValidFlags = 0;
-        inout->fIsSingleComponent = false;
+        inout->mulByUnknownAlpha();
     }
 
     GrPrimitiveEdgeType   fEdgeType;
     const GrShaderVar& fInHairQuadEdge;
 
     GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
 
     typedef GrGeometryProcessor INHERITED;
 };
 
@@ skipping 53 matching lines @@
     typedef GrGLCubicEffect GLProcessor;
 
     virtual const GrBackendGeometryProcessorFactory& getFactory() const SK_OVERRIDE;
 
 private:
     GrCubicEffect(GrPrimitiveEdgeType);
 
     virtual bool onIsEqual(const GrProcessor& other) const SK_OVERRIDE;
 
     virtual void onComputeInvariantOutput(InvariantOutput* inout) const SK_OVERRIDE {
-        inout->fValidFlags = 0;
-        inout->fIsSingleComponent = false;
+        inout->mulByUnknownAlpha();
     }
 
     GrPrimitiveEdgeType   fEdgeType;
     const GrShaderVar& fInCubicCoeffs;
 
     GR_DECLARE_GEOMETRY_PROCESSOR_TEST;
 
     typedef GrGeometryProcessor INHERITED;
 };
 
 #endif