Add Gr*Proxy classes

include/gpu/GrRenderTarget.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.
  */
 
 #ifndef GrRenderTarget_DEFINED
 #define GrRenderTarget_DEFINED
 
 #include "GrSurface.h"
 #include "SkRect.h"
 
+class GrCaps;
 class GrDrawTarget;
 class GrStencilAttachment;
 class GrRenderTargetPriv;
 
 /**
  * GrRenderTarget represents a 2D buffer of pixels that can be rendered to.
  * A context's render target is set by setRenderTarget(). Render targets are
  * created by a createTexture with the kRenderTarget_SurfaceFlag flag.
  * Additionally, GrContext provides methods for creating GrRenderTargets
  * that wrap externally created render targets.
@@ skipping 124 matching lines @@
     // Checked when this object is asked to attach a stencil buffer.
     virtual bool canAttemptStencilAttachment() const = 0;
 
     // Provides access to functions that aren't part of the public API.
     GrRenderTargetPriv renderTargetPriv();
     const GrRenderTargetPriv renderTargetPriv() const;
 
     void setLastDrawTarget(GrDrawTarget* dt);
     GrDrawTarget* getLastDrawTarget() { return fLastDrawTarget; }
 
+    static SampleConfig ComputeSampleConfig(const GrCaps& caps, int sampleCnt);
+
 protected:
     GrRenderTarget(GrGpu* gpu, const GrSurfaceDesc& desc,
                    SampleConfig sampleConfig, GrStencilAttachment* stencil = nullptr)
         : INHERITED(gpu, desc)
         , fStencilAttachment(stencil)
         , fSampleConfig(sampleConfig)
         , fLastDrawTarget(nullptr) {
         fResolveRect.setLargestInverted();
     }
 
@@ skipping 23 matching lines @@
     // This back-pointer is required so that we can add a dependancy between
     // the drawTarget used to create the current contents of this renderTarget
     // and the drawTarget of a destination renderTarget to which this one is being drawn.
     GrDrawTarget* fLastDrawTarget;
 
     typedef GrSurface INHERITED;
 };
 
 
 #endif