Make "priv" classes for GrTexure and GrSurface.

include/gpu/GrSurface.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrSurface_DEFINED
 #define GrSurface_DEFINED
 
 #include "GrTypes.h"
 #include "GrGpuResource.h"
+#include "SkImageInfo.h"
 #include "SkRect.h"
 
+class GrRenderTarget;
+class GrSurfacePriv;
 class GrTexture;
-class GrRenderTarget;
-struct SkImageInfo;
 
 class GrSurface : public GrGpuResource {
 public:
     SK_DECLARE_INST_COUNT(GrSurface);
 
     /**
      * Retrieves the width of the surface.
      *
      * @return the width in texels
      */
@@ skipping 23 matching lines @@
      * if client asked us to render to a target that has a pixel
      * config that isn't equivalent with one of our configs.
      */
     GrPixelConfig config() const { return fDesc.fConfig; }
 
     /**
      * Return the descriptor describing the surface
      */
     const GrTextureDesc& desc() const { return fDesc; }
 
-    SkImageInfo info() const;
-
     /**
      * @return the texture associated with the surface, may be NULL.
      */
     virtual GrTexture* asTexture() = 0;
     virtual const GrTexture* asTexture() const = 0;
 
     /**
      * @return the render target underlying this surface, may be NULL.
      */
     virtual GrRenderTarget* asRenderTarget() = 0;
     virtual const GrRenderTarget* asRenderTarget() const = 0;
 
     /**
-     * Checks whether this GrSurface refers to the same GPU object as other. This
-     * catches the case where a GrTexture and GrRenderTarget refer to the same
-     * GPU memory.
-     */
-    bool isSameAs(const GrSurface* other) const {
-        const GrRenderTarget* thisRT = this->asRenderTarget();
-        if (thisRT) {
-            return thisRT == other->asRenderTarget();
-        } else {
-            const GrTexture* thisTex = this->asTexture();
-            SkASSERT(thisTex); // We must be one or the other
-            return thisTex == other->asTexture();
-        }
-    }
-
-    /**
      * Reads a rectangle of pixels from the surface.
      * @param left          left edge of the rectangle to read (inclusive)
      * @param top           top edge of the rectangle to read (inclusive)
      * @param width         width of rectangle to read in pixels.
      * @param height        height of rectangle to read in pixels.
      * @param config        the pixel config of the destination buffer
      * @param buffer        memory to read the rectangle into.
      * @param rowBytes      number of bytes between consecutive rows. Zero means rows are tightly
      *                      packed.
      * @param pixelOpsFlags See the GrContext::PixelOpsFlags enum.
@@ skipping 19 matching lines @@
      * @param rowBytes      number of bytes between consecutive rows. Zero means rows are tightly
      *                      packed.
      * @param pixelOpsFlags See the GrContext::PixelOpsFlags enum.
      */
     virtual void writePixels(int left, int top, int width, int height,
                              GrPixelConfig config,
                              const void* buffer,
                              size_t rowBytes = 0,
                              uint32_t pixelOpsFlags = 0) = 0;
 
-    /**
-     * Write the contents of the surface to a PNG. Returns true if successful.
-     * @param filename      Full path to desired file
-     */
+    /** Access methods that are only to be used within Skia code. */
+    inline GrSurfacePriv surfacePriv();
+    inline const GrSurfacePriv surfacePriv() const;
+
+protected:
+    // Methods made available via GrSurfacePriv
+    SkImageInfo info() const;
     bool savePixels(const char* filename);
-
     bool hasPendingRead() const;
     bool hasPendingWrite() const;
     bool hasPendingIO() const;
+    bool isSameAs(const GrSurface* other) const;
 
-protected:
+    // Provides access to methods that should be public within Skia code.
+    friend class GrSurfacePriv;
+
     GrSurface(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc)
     : INHERITED(gpu, isWrapped)
     , fDesc(desc) {
     }
 
     GrTextureDesc fDesc;
 
 private:
     typedef GrGpuResource INHERITED;
 };
 
-#endif // GrSurface_DEFINED
+#endif