Add mixed samples support to XPs

src/gpu/GrPipelineBuilder.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrPipelineBuilder.h"
 
 #include "GrBatch.h"
@@ skipping 71 matching lines @@
 
     fColorCache = GrColor_ILLEGAL;
     fCoverageCache = GrColor_ILLEGAL;
 }
 
 //////////////////////////////////////////////////////////////////////////////s
 
 bool GrPipelineBuilder::willXPNeedDstTexture(const GrCaps& caps,
                                              const GrProcOptInfo& colorPOI,
                                              const GrProcOptInfo& coveragePOI) const {
-    return this->getXPFactory()->willNeedDstTexture(caps, colorPOI, coveragePOI);
+    return this->getXPFactory()->willNeedDstTexture(caps, colorPOI, coveragePOI,
+                                                    this->hasMixedSamples());
 }
 
 void GrPipelineBuilder::AutoRestoreFragmentProcessors::set(GrPipelineBuilder* pipelineBuilder) {
     if (fPipelineBuilder) {
         int m = fPipelineBuilder->numColorFragmentStages() - fColorEffectCnt;
         SkASSERT(m >= 0);
         fPipelineBuilder->fColorStages.pop_back_n(m);
 
         int n = fPipelineBuilder->numCoverageFragmentStages() - fCoverageEffectCnt;
         SkASSERT(n >= 0);
@@ skipping 65 matching lines @@
 void GrPipelineBuilder::calcCoverageInvariantOutput(GrColor coverage) const {
     if (!fCoverageProcInfoValid || coverage != fCoverageCache) {
         GrColorComponentFlags flags = kRGBA_GrColorComponentFlags;
         fCoverageProcInfo.calcWithInitialValues(fCoverageStages.begin(),
                                                 this->numCoverageFragmentStages(), coverage, flags,
                                                 true);
         fCoverageProcInfoValid = true;
         fCoverageCache = coverage;
     }
 }