nexus 9 fix

src/gpu/GrContext.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrContext.h"
 
@@ skipping 831 matching lines @@
     void getInvariantOutputColor(GrInitInvariantOutput* out) const SK_OVERRIDE {
         // When this is called on a batch, there is only one geometry bundle
         if (this->hasColors()) {
             out->setUnknownFourComponents();
         } else {
             out->setKnownFourComponents(fGeoData[0].fColor);
         }
     }
 
     void getInvariantOutputCoverage(GrInitInvariantOutput* out) const SK_OVERRIDE {
-        out->setUnknownSingleComponent();
+        out->setKnownSingleComponent(0xff);
     }
 
     void initBatchTracker(const GrPipelineInfo& init) SK_OVERRIDE {
         // Handle any color overrides
         if (init.fColorIgnored) {
             fGeoData[0].fColor = GrColor_ILLEGAL;
         } else if (GrColor_ILLEGAL != init.fOverrideColor) {
             fGeoData[0].fColor = init.fOverrideColor;
         }
 
@@ skipping 1119 matching lines @@
     }
 }
 
 void GrContext::removeGpuTraceMarker(const GrGpuTraceMarker* marker) {
     fGpu->removeGpuTraceMarker(marker);
     if (fDrawBuffer) {
         fDrawBuffer->removeGpuTraceMarker(marker);
     }
 }