Use texture barriers to read directly from the RT

src/gpu/GrTest.cpp

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTest.h"
 
@@ skipping 154 matching lines @@
 
     bool copySurface(GrSurface* dst,
                      GrSurface* src,
                      const SkIRect& srcRect,
                      const SkIPoint& dstPoint) override { return false; };
 
     bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) override {
         return false;
     }
 
+    void blendBarrier() override {}
+
 private:
     void onResetContext(uint32_t resetBits) override {}
 
     GrTexture* onCreateTexture(const GrSurfaceDesc& desc, bool budgeted, const void* srcData,
                                size_t rowBytes) override {
         return NULL;
     }
 
     GrTexture* onCreateCompressedTexture(const GrSurfaceDesc& desc, bool budgeted,
                                          const void* srcData) override {
@@ skipping 81 matching lines @@
     // these objects are required for any of tests that use this context. TODO: make stop allocating
     // resources in the buffer pools.
     SkDELETE(fDrawBuffer);
     SkDELETE(fDrawBufferVBAllocPool);
     SkDELETE(fDrawBufferIBAllocPool);
 
     fDrawBuffer = NULL;
     fDrawBufferVBAllocPool = NULL;
     fDrawBufferIBAllocPool = NULL;
 }