Add ANGLE workaround to prefer flushes over VRAM usage

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
 
@@ skipping 115 matching lines @@
 #endif
     bool compressedTexSubImageSupport() const { return fCompressedTexSubImageSupport; }
     bool oversizedStencilSupport() const { return fOversizedStencilSupport; }
     bool textureBarrierSupport() const { return fTextureBarrierSupport; }
 
     bool useDrawInsteadOfClear() const { return fUseDrawInsteadOfClear; }
     bool useDrawInsteadOfPartialRenderTargetWrite() const {
         return fUseDrawInsteadOfPartialRenderTargetWrite;
     }
 
+    bool preferVRAMUseOverFlushes() const { return fPreferVRAMUseOverFlushes; }
+
     /**
      * Indicates the capabilities of the fixed function blend unit.
      */
     enum BlendEquationSupport {
         kBasic_BlendEquationSupport,             //<! Support to select the operator that
                                                  //   combines src and dst terms.
         kAdvanced_BlendEquationSupport,          //<! Additional fixed function support for specific
                                                  //   SVG/PDF blend modes. Requires blend barriers.
         kAdvancedCoherent_BlendEquationSupport,  //<! Advanced blend equation support that does not
                                                  //   require blend barriers, and permits overlap.
@@ skipping 96 matching lines @@
     bool fOversizedStencilSupport                    : 1;
     bool fTextureBarrierSupport                      : 1;
     bool fSupportsInstancedDraws                     : 1;
     bool fFullClearIsFree                            : 1;
     bool fMustClearUploadedBufferData                : 1;
 
     // Driver workaround
     bool fUseDrawInsteadOfClear                      : 1;
     bool fUseDrawInsteadOfPartialRenderTargetWrite   : 1;
 
+    // ANGLE workaround
+    bool fPreferVRAMUseOverFlushes                   : 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