Add support for using glCopyTexSubImage2D when possible to copy surfaces.

src/gpu/GrInOrderDrawBuffer.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 59 matching lines @@
 
     bool isFlushing() const { return fFlushing; }
 
     // overrides from GrDrawTarget
     virtual bool geometryHints(int* vertexCount,
                                int* indexCount) const SK_OVERRIDE;
     virtual void clear(const GrIRect* rect,
                        GrColor color,
                        GrRenderTarget* renderTarget = NULL) SK_OVERRIDE;
 
+    virtual void initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) SK_OVERRIDE;
+
+
 protected:
     virtual void clipWillBeSet(const GrClipData* newClip) SK_OVERRIDE;
 
 private:
     enum Cmd {
         kDraw_Cmd           = 1,
         kStencilPath_Cmd    = 2,
         kSetState_Cmd       = 3,
         kSetClip_Cmd        = 4,
         kClear_Cmd          = 5,
@@ skipping 132 matching lines @@
         size_t                          fUsedPoolIndexBytes;
     };
     SkSTArray<kGeoPoolStatePreAllocCnt, GeometryPoolState> fGeoPoolStateStack;
 
     bool                            fFlushing;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif