diff -r 000000000000 -r bde4ae8d615e os/graphics/windowing/windowserver/nonnga/SERVER/offscreenbitmap.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/graphics/windowing/windowserver/nonnga/SERVER/offscreenbitmap.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,85 @@
+// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#if !defined(__OFFSCREENBITMAP_H__)
+#define __OFFSCREENBITMAP_H__
+
+#include <e32std.h>
+#include <e32base.h>
+#include <gdi.h>
+
+#include <Graphics/WSGRAPHICDRAWERINTERFACE.H>
+
+class CFbsBitmapDevice;
+class CWsClientWindow;
+class CWsWindow;
+class CWsWindowBase;
+class CWsClient;
+class CScreen;
+class DWsBitmap;
+
+#if defined(__WINS__) && defined(_DEBUG)
+class CDebugOsbWin;
+#endif
+
+class CWsOffScreenBitmap : public CBase, public MWsBackBuffer
+	{
+public: // Construction / Destruction
+	static CWsOffScreenBitmap* NewL(CScreen* aScreen);
+	~CWsOffScreenBitmap();
+protected:
+	CWsOffScreenBitmap(CScreen* aScreen);
+	void ConstructL();
+public: // Bitmap
+	TInt DisplayModeChanged(TBool aSwapWidthAndHeight);
+	void UpdateGc(const TBool aSwapWidthAndHeight);
+public:
+	CFbsBitmap* Bitmap();
+	CFbsDevice* BitmapDevice();
+	
+public: // implementing MWsObjectProvider
+	TAny* ResolveObjectInterface(TUint aTypeId);
+	
+public: // implementing MWsBackBuffer
+	CFbsBitmap* GetBitmap();
+	CFbsBitGc* GetBitGc();
+	CFbsBitGc* GetBitGcCurrent();
+	TInt SetBitGc(CFbsBitGc* aBitGc);
+	TInt RedirectTo(MWsBackBuffer* aTarget);
+	void SetObserver(MWsFlickerFreeBufferObserver* aObserver);
+	MWsFlickerFreeBufferObserver* Observer();
+#if defined(__WINS__) && defined(_DEBUG)
+	void Update();
+#endif	
+
+protected:	// Data
+	CFbsBitGc* iBitmapGc;
+	CFbsBitmap* iBitmap;
+	CFbsBitmapDevice* iBitmapDevice;
+	CScreen* iScreen;
+	
+private:	// Data
+#if defined(__WINS__) && defined(_DEBUG)
+	CDebugOsbWin* iOsbWin;
+#endif
+
+private:	// Data
+	// used by MWsBackBuffer to redirect OSB output
+	CFbsBitGc* iRedirectGc;
+	MWsBackBuffer* iRedirectBuffer;
+	MWsFlickerFreeBufferObserver* iObserver;
+	};
+
+#endif // __OFFSCREENBITMAP__