Re-enable advanced blend with a blacklist

include/gpu/GrCaps.h

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrCaps_DEFINED
 #define GrCaps_DEFINED
 
 #include "GrTypes.h"
 #include "GrTypesPriv.h"
+#include "GrBlend.h"
 #include "GrShaderVar.h"
 #include "SkRefCnt.h"
 #include "SkString.h"
 
 struct GrContextOptions;
 
 class GrShaderCaps : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(GrShaderCaps)
 
@@ skipping 127 matching lines @@
     BlendEquationSupport blendEquationSupport() const { return fBlendEquationSupport; }
 
     bool advancedBlendEquationSupport() const {
         return fBlendEquationSupport >= kAdvanced_BlendEquationSupport;
     }
 
     bool advancedCoherentBlendEquationSupport() const {
         return kAdvancedCoherent_BlendEquationSupport == fBlendEquationSupport;
     }
 
+    bool canUseAdvancedBlendEquation(GrBlendEquation equation) const {
+        SkASSERT(GrBlendEquationIsAdvanced(equation));
+        return SkToBool(fAdvBlendEqBlacklist & (1 << equation));
+    }
+
     /**
      * Indicates whether GPU->CPU memory mapping for GPU resources such as vertex buffers and
      * textures allows partial mappings or full mappings.
      */
     enum MapFlags {
         kNone_MapFlags   = 0x0,       //<! Cannot map the resource.
 
         kCanMap_MapFlag  = 0x1,       //<! The resource can be mapped. Must be set for any of
                                       //   the other flags to have meaning.k
         kSubset_MapFlag  = 0x2,       //<! The resource can be partially mapped.
@@ skipping 51 matching lines @@
     bool fDiscardRenderTargetSupport    : 1;
     bool fReuseScratchTextures          : 1;
     bool fGpuTracingSupport             : 1;
     bool fCompressedTexSubImageSupport  : 1;
     bool fOversizedStencilSupport       : 1;
     bool fTextureBarrierSupport         : 1;
     // Driver workaround
     bool fUseDrawInsteadOfClear         : 1;
 
     BlendEquationSupport fBlendEquationSupport;
+    uint32_t fAdvBlendEqBlacklist;
+    GR_STATIC_ASSERT(kLast_GrBlendEquation < 32);
+
     uint32_t fMapBufferFlags;
     int fGeometryBufferMapThreshold;
 
     int fMaxRenderTargetSize;
     int fMaxTextureSize;
     int fMinTextureSize;
     int fMaxSampleCount;
 
     // The first entry for each config is without msaa and the second is with.
     bool fConfigRenderSupport[kGrPixelConfigCnt][2];
     bool fConfigTextureSupport[kGrPixelConfigCnt];
 
 private:
     bool fSupressPrints : 1;
     bool fDrawPathMasksToCompressedTextureSupport : 1;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif