Work around for nexus 6 TexSubImage issue

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 @@
 #if GR_FORCE_GPU_TRACE_DEBUGGING
     bool gpuTracingSupport() const { return true; }
 #else
     bool gpuTracingSupport() const { return fGpuTracingSupport; }
 #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;
+    }
 
     /**
      * 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
@@ skipping 67 matching lines @@
     }
 
 protected:
     /** Subclasses must call this at the end of their constructors in order to apply caps
         overrides requested by the client. Note that overrides will only reduce the caps never
         expand them. */
     void applyOptionsOverrides(const GrContextOptions& options);
 
     SkAutoTUnref<GrShaderCaps>    fShaderCaps;
 
-    bool fNPOTTextureTileSupport        : 1;
-    bool fMipMapSupport                 : 1;
-    bool fTwoSidedStencilSupport        : 1;
-    bool fStencilWrapOpsSupport         : 1;
-    bool fDiscardRenderTargetSupport    : 1;
-    bool fReuseScratchTextures          : 1;
-    bool fGpuTracingSupport             : 1;
-    bool fCompressedTexSubImageSupport  : 1;
-    bool fOversizedStencilSupport       : 1;
-    bool fTextureBarrierSupport         : 1;
+    bool fNPOTTextureTileSupport                     : 1;
+    bool fMipMapSupport                              : 1;
+    bool fTwoSidedStencilSupport                     : 1;
+    bool fStencilWrapOpsSupport                      : 1;
+    bool fDiscardRenderTargetSupport                 : 1;
+    bool fReuseScratchTextures                       : 1;
+    bool fGpuTracingSupport                          : 1;
+    bool fCompressedTexSubImageSupport               : 1;
+    bool fOversizedStencilSupport                    : 1;
+    bool fTextureBarrierSupport                      : 1;
     // Driver workaround
-    bool fUseDrawInsteadOfClear         : 1;
+    bool fUseDrawInsteadOfClear                      : 1;
+    bool fUseDrawInsteadOfPartialRenderTargetWrite   : 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