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"
@@ skipping 41 matching lines @@
     // No need to have an override color if it isn't even going to be used.
     if (SkToBool(GrXferProcessor::kIgnoreColor_OptFlag & optFlags)) {
         overrideColor = GrColor_ILLEGAL;
     }
 
     GrPipeline* pipeline = new (memory) GrPipeline;
     pipeline->fXferProcessor.reset(xferProcessor.get());
 
     pipeline->fRenderTarget.reset(builder.fRenderTarget.get());
     SkASSERT(pipeline->fRenderTarget);
-    pipeline->fScissorState = *args.fScissor;
+    pipeline->fScissorState = args.fClip->scissorState();
     pipeline->fStencilSettings = builder.getStencil();
     pipeline->fDrawFace = builder.getDrawFace();
 
     pipeline->fFlags = 0;
-    if (builder.isHWAntialias()) {
+    if (args.fClip->isCoCenteredMultisampledDraw()) {
+        SkASSERT(args.fCaps->programmableSampleLocationsSupport() && !builder.isHWAntialias());
+        pipeline->fFlags |= (kHWAA_Flag | kCoCenteredSamples_Flag);
+    } else if (builder.isHWAntialias()) {
         pipeline->fFlags |= kHWAA_Flag;
     }
     if (builder.snapVerticesToPixelCenters()) {
         pipeline->fFlags |= kSnapVertices_Flag;
     }
 
     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
@@ skipping 129 matching lines @@
     }
 
     for (int i = 0; i < a.numFragmentProcessors(); i++) {
         if (!a.getFragmentProcessor(i).isEqual(b.getFragmentProcessor(i), ignoreCoordTransforms)) {
             return false;
         }
     }
     return true;
 }