Implement support for mixed sampled render targets

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 30 matching lines @@
     fCoverageCache = that.fCoverageCache;
     if (fColorProcInfoValid) {
         fColorProcInfo = that.fColorProcInfo;
     }
     if (fCoverageProcInfoValid) {
         fCoverageProcInfo = that.fCoverageProcInfo;
     }
     return *this;
 }
 
-void GrPipelineBuilder::setFromPaint(const GrPaint& paint, GrRenderTarget* rt, const GrClip& clip) {
+void GrPipelineBuilder::setFromPaint(const GrPaint& paint, GrRenderTarget* rt, const GrClip& clip,
+                                     GrRenderTarget::PipelineStage pipelineStage) {
     SkASSERT(0 == fBlockEffectRemovalCnt || 0 == this->numFragmentStages());
 
     fColorStages.reset();
     fCoverageStages.reset();
 
     for (int i = 0; i < paint.numColorStages(); ++i) {
         fColorStages.push_back(paint.getColorStage(i));
     }
 
     for (int i = 0; i < paint.numCoverageStages(); ++i) {
         fCoverageStages.push_back(paint.getCoverageStage(i));
     }
 
     fXPFactory.reset(SkRef(paint.getXPFactory()));
 
     this->setRenderTarget(rt);
 
     // These have no equivalent in GrPaint, set them to defaults
     fDrawFace = kBoth_DrawFace;
     fStencilSettings.setDisabled();
     fFlagBits = 0;
 
     fClip = clip;
 
     this->setState(GrPipelineBuilder::kDither_StateBit, paint.isDither());
     this->setState(GrPipelineBuilder::kHWAntialias_StateBit,
-                   rt->isMultisampled() && paint.isAntiAlias());
+                   rt->isMultisampled(pipelineStage) && paint.isAntiAlias());
 
     fColorProcInfoValid = false;
     fCoverageProcInfoValid = false;
 
     fColorCache = GrColor_ILLEGAL;
     fCoverageCache = GrColor_ILLEGAL;
 }
 
 //////////////////////////////////////////////////////////////////////////////s
 
@@ skipping 88 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;
     }
 }