update example

include/views/SkWindow.h

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkWindow_DEFINED
 #define SkWindow_DEFINED
 
 #include "SkView.h"
 #include "SkBitmap.h"
 #include "SkMatrix.h"
 #include "SkRegion.h"
 #include "SkEvent.h"
 #include "SkKey.h"
 #include "SkSurfaceProps.h"
 #include "SkTDArray.h"
 
 #ifdef SK_BUILD_FOR_WINCEx
     #define SHOW_FPS
 #endif
 //#define USE_GX_SCREEN
 
 class SkSurface;
 class SkOSMenu;
 
+#if SK_SUPPORT_GPU
+struct GrGLInterface;
+class GrContext;
+class GrRenderTarget;
+#endif
+
 class SkWindow : public SkView {
 public:
             SkWindow();
     virtual ~SkWindow();
 
+    struct AttachmentInfo {
+        int fSampleCount;
+        int fStencilBits;
+    };
+
     SkSurfaceProps getSurfaceProps() const { return fSurfaceProps; }
     void setSurfaceProps(const SkSurfaceProps& props) {
         fSurfaceProps = props;
     }
 
     const SkBitmap& getBitmap() const { return fBitmap; }
 
     void    setColorType(SkColorType);
     void    resize(int width, int height, SkColorType = kUnknown_SkColorType);
 
@@ skipping 35 matching lines @@
     virtual bool onHandleKeyUp(SkKey);
     virtual void onAddMenu(const SkOSMenu*) {};
     virtual void onUpdateMenu(const SkOSMenu*) {};
     virtual void onSetTitle(const char title[]) {}
 
     // overrides from SkView
     virtual bool handleInval(const SkRect*);
     virtual bool onGetFocusView(SkView** focus) const;
     virtual bool onSetFocusView(SkView* focus);
 
+#if SK_SUPPORT_GPU
+    GrRenderTarget* renderTarget(const AttachmentInfo& attachmentInfo,
+                                 const GrGLInterface* , GrContext* grContext);
+#endif
+
 private:
     SkSurfaceProps  fSurfaceProps;
     SkColorType fColorType;
     SkBitmap    fBitmap;
     SkRegion    fDirtyRgn;
 
     SkTDArray<Click*>       fClicks; // to track clicks
 
     SkTDArray<SkOSMenu*>    fMenus;
 
@@ skipping 18 matching lines @@
     #include "SkOSWindow_Android.h"
 #elif defined(SK_BUILD_FOR_UNIX)
   #include "SkOSWindow_Unix.h"
 #elif defined(SK_BUILD_FOR_SDL)
     #include "SkOSWindow_SDL.h"
 #elif defined(SK_BUILD_FOR_IOS)
     #include "SkOSWindow_iOS.h"
 #endif
 
 #endif