Remove hasMixedSamples() from GrPipelineBuilder

src/gpu/GrPipeline.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 "GrPipeline.h"
 
 #include "GrCaps.h"
 #include "GrDrawTarget.h"
 #include "GrGpu.h"
 #include "GrPipelineBuilder.h"
 #include "GrProcOptInfo.h"
 #include "GrXferProcessor.h"
 
 #include "batches/GrBatch.h"
 
 GrPipeline* GrPipeline::CreateAt(void* memory, const CreateArgs& args,
                                  GrXPOverridesForBatch* overrides) {
     const GrPipelineBuilder& builder = *args.fPipelineBuilder;
 
     // Create XferProcessor from DS's XPFactory
+    bool hasMixedSamples = builder.getRenderTarget()->hasMixedSamples() &&
+                           (builder.isHWAntialias() || !builder.getStencil().isDisabled());
     const GrXPFactory* xpFactory = builder.getXPFactory();
     SkAutoTUnref<GrXferProcessor> xferProcessor;
     if (xpFactory) {
         xferProcessor.reset(xpFactory->createXferProcessor(args.fOpts,
-                                                           builder.hasMixedSamples(),
+                                                           hasMixedSamples,
                                                            &args.fDstTexture,
                                                            *args.fCaps));
         if (!xferProcessor) {
             return nullptr;
         }
     } else {
         // This may return nullptr in the common case of src-over implemented using hw blending.
         xferProcessor.reset(GrPorterDuffXPFactory::CreateSrcOverXferProcessor(
                                                                         *args.fCaps,
                                                                         args.fOpts,
-                                                                        builder.hasMixedSamples(),
+                                                                        hasMixedSamples,
                                                                         &args.fDstTexture));
     }
-   GrColor overrideColor = GrColor_ILLEGAL;
+    GrColor overrideColor = GrColor_ILLEGAL;
     if (args.fOpts.fColorPOI.firstEffectiveProcessorIndex() != 0) {
         overrideColor = args.fOpts.fColorPOI.inputColorToFirstEffectiveProccesor();
     }
 
     GrXferProcessor::OptFlags optFlags = GrXferProcessor::kNone_OptFlags;
 
     const GrXferProcessor* xpForOpts = xferProcessor ? xferProcessor.get() :
                                                        &GrPorterDuffXPFactory::SimpleSrcOverXP();
     optFlags = xpForOpts->getOptimizations(args.fOpts,
                                            builder.getStencil().doesWrite(),
@@ skipping 171 matching lines @@
         }
     }
 
     for (int i = 0; i < a.numFragmentProcessors(); i++) {
         if (!a.getFragmentProcessor(i).isEqual(b.getFragmentProcessor(i), ignoreCoordTransforms)) {
             return false;
         }
     }
     return true;
 }