Fix mixed samples stencil clip

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,
                                  GrPipelineOptimizations* opts) {
+    SkASSERT(!(args.fAdditionalFlags & args.fBlockedFlags));
+
     const GrPipelineBuilder& builder = *args.fPipelineBuilder;
 
     // Create XferProcessor from DS's XPFactory
     SkAutoTUnref<GrXferProcessor> xferProcessor(
         builder.getXPFactory()->createXferProcessor(args.fColorPOI, args.fCoveragePOI,
                                                     builder.hasMixedSamples(), &args.fDstTexture,
                                                     *args.fCaps));
     if (!xferProcessor) {
         return nullptr;
     }
@@ skipping 25 matching lines @@
 
     GrPipeline* pipeline = new (memory) GrPipeline;
     pipeline->fXferProcessor.reset(xferProcessor.get());
 
     pipeline->fRenderTarget.reset(builder.fRenderTarget.get());
     SkASSERT(pipeline->fRenderTarget);
     pipeline->fScissorState = *args.fScissor;
     pipeline->fStencilSettings = builder.getStencil();
     pipeline->fDrawFace = builder.getDrawFace();
 
-    pipeline->fFlags = 0;
+    pipeline->fFlags = args.fAdditionalFlags;
     if (builder.isHWAntialias()) {
         pipeline->fFlags |= kHWAA_Flag;
     }
     if (builder.snapVerticesToPixelCenters()) {
         pipeline->fFlags |= kSnapVertices_Flag;
     }
+    pipeline->fFlags &= ~args.fBlockedFlags;
 
     int firstColorProcessorIdx = args.fColorPOI.firstEffectiveProcessorIndex();
 
     // TODO: Once we can handle single or four channel input into coverage GrFragmentProcessors
     // then we can use GrPipelineBuilder's coverageProcInfo (like color above) to set this initial
     // information.
     int firstCoverageProcessorIdx = 0;
 
     pipeline->adjustProgramFromOptimizations(builder, optFlags, args.fColorPOI, args.fCoveragePOI,
                                              &firstColorProcessorIdx, &firstCoverageProcessorIdx);
@@ skipping 124 matching lines @@
     }
 
     for (int i = 0; i < a.numFragmentProcessors(); i++) {
         if (!a.getFragmentProcessor(i).isEqual(b.getFragmentProcessor(i), ignoreCoordTransforms)) {
             return false;
         }
     }
     return true;
 }