Implement support for mixed sampled render targets

src/gpu/gl/GrGLRenderTarget.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 GrGLRenderTarget_DEFINED
 #define GrGLRenderTarget_DEFINED
 
 #include "GrGLIRect.h"
 #include "GrRenderTarget.h"
 #include "SkScalar.h"
 
 class GrGLGpu;
 
 class GrGLRenderTarget : public GrRenderTarget {
 public:
     // set fTexFBOID to this value to indicate that it is multisampled but
     // Gr doesn't know how to resolve it.
     enum { kUnresolvableFBOID = 0 };
 
     struct IDDesc {
         GrGLuint                    fRTFBOID;
         GrGLuint                    fTexFBOID;
         GrGLuint                    fMSColorRenderbufferID;
         GrGpuResource::LifeCycle    fLifeCycle;
+        GrSampleConfig              fSampleConfig;
     };
 
     GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&);
 
     void setViewport(const GrGLIRect& rect) { fViewport = rect; }
     const GrGLIRect& getViewport() const { return fViewport; }
 
     // The following two functions return the same ID when a
     // texture/render target is multisampled, and different IDs when
     // it is.
@@ skipping 49 matching lines @@
 
     // onGpuMemorySize() needs to know what how many color values are owned per pixel. However,
     // abandon and release zero out the IDs and the cache needs to know the size even after those
     // actions.
     uint8_t fColorValuesPerPixel;
 
     typedef GrRenderTarget INHERITED;
 };
 
 #endif