Move willUseInputColor check to computeInvariantOutput

src/gpu/GrProcessor.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrProcessor.h"
 #include "GrBackendProcessorFactory.h"
 #include "GrContext.h"
@@ skipping 115 matching lines @@
 
 void GrProcessor::InvariantOutput::validate() const {
     if (fIsSingleComponent) {
         SkASSERT(0 == fValidFlags || kRGBA_GrColorComponentFlags == fValidFlags);
         if (kRGBA_GrColorComponentFlags == fValidFlags) {
             SkASSERT(this->colorComponentsAllEqual());
         }
     }
 
     SkASSERT(this->validPreMulColor());
+
+    // If we claim that we are not using the input color we must not be modulating the input.
+    SkASSERT(fNonMulStageFound || fWillUseInputColor);
 }
 
 bool GrProcessor::InvariantOutput::colorComponentsAllEqual() const {
     unsigned colorA = GrColorUnpackA(fColor);
     return(GrColorUnpackR(fColor) == colorA &&
            GrColorUnpackG(fColor) == colorA &&
            GrColorUnpackB(fColor) == colorA);
 }
 
 bool GrProcessor::InvariantOutput::validPreMulColor() const {
@@ skipping 19 matching lines @@
     return true;
 }
 #endif // end DEBUG
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 void GrFragmentProcessor::addCoordTransform(const GrCoordTransform* transform) {
     fCoordTransforms.push_back(transform);
     SkDEBUGCODE(transform->setInEffect();)
 }