Remove kDisableBlend_BlendOptFlag as it is no longer needed

src/gpu/GrDrawTarget.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 597 matching lines @@
         this->fActiveTraceMarkers.remove(*marker);
         this->didRemoveGpuTraceMarker();
         --fGpuTraceMarkerCount;
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 bool GrDrawTarget::canApplyCoverage() const {
     // we can correctly apply coverage if a) we have dual source blending
-    // or b) one of our blend optimizations applies.
+    // or b) one of our blend optimizations applies
+    // or c) the src, dst blend coeffs are 1,0 and we will read Dst Color
+    GrBlendCoeff srcCoeff;
+    GrBlendCoeff dstCoeff;
+    GrDrawState::BlendOptFlags flag = this->getDrawState().getBlendOpts(true, &srcCoeff, &dstCoeff);
     return this->caps()->dualSourceBlendingSupport() ||
-           GrDrawState::kNone_BlendOpt != this->getDrawState().getBlendOpts(true);
+           GrDrawState::kNone_BlendOpt != flag ||
+           (this->getDrawState().willEffectReadDstColor() &&
+            kOne_GrBlendCoeff == srcCoeff && kZero_GrBlendCoeff == dstCoeff);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 void GrDrawTarget::drawIndexedInstances(GrPrimitiveType type,
                                         int instanceCount,
                                         int verticesPerInstance,
                                         int indicesPerInstance,
                                         const SkRect* devBounds) {
     if (!verticesPerInstance || !indicesPerInstance) {
@@ skipping 515 matching lines @@
     SkASSERT(!fConfigTextureSupport[kUnknown_GrPixelConfig]);
 
     for (size_t i = 1; i < SK_ARRAY_COUNT(kConfigNames); ++i)  {
         r.appendf("%s is uploadable to a texture: %s\n",
                   kConfigNames[i],
                   gNY[fConfigTextureSupport[i]]);
     }
 
     return r;
 }