Check XpFactory equality in DrawState

src/gpu/effects/GrPorterDuffXferProcessor.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "effects/GrPorterDuffXferProcessor.h"
 
 #include "GrDrawState.h"
@@ skipping 47 matching lines @@
 GrGLFragmentProcessor* GrPorterDuffXferProcessor::createGLInstance() const {
     return SkNEW_ARGS(GrGLPorterDuffXferProcessor, (*this));
 }
 
 void GrPorterDuffXferProcessor::onComputeInvariantOutput(GrInvariantOutput* inout) const {
     inout->setToUnknown(GrInvariantOutput::kWillNot_ReadInput);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
+GrPorterDuffXPFactory::GrPorterDuffXPFactory(GrBlendCoeff src, GrBlendCoeff dst)
+    : fSrc(src), fDst(dst) {
+    this->initClassID<GrPorterDuffXPFactory>();
+}
+
 GrXPFactory* GrPorterDuffXPFactory::Create(SkXfermode::Mode mode) {
     switch (mode) {
         case SkXfermode::kClear_Mode: {
             static GrPorterDuffXPFactory gClearPDXPF(kZero_GrBlendCoeff, kZero_GrBlendCoeff);
             return SkRef(&gClearPDXPF);
             break;
         }
         case SkXfermode::kSrc_Mode: {
             static GrPorterDuffXPFactory gSrcPDXPF(kOne_GrBlendCoeff, kZero_GrBlendCoeff);
             return SkRef(&gSrcPDXPF);
@@ skipping 75 matching lines @@
 
 bool GrPorterDuffXPFactory::supportsRGBCoverage(GrColor /*knownColor*/,
                                                 uint32_t knownColorFlags) const {
     if (kOne_GrBlendCoeff == fSrc && kISA_GrBlendCoeff == fDst &&
         kRGBA_GrColorComponentFlags == knownColorFlags) {
         return true;
     }
     return false;
 }