diff -r 000000000000 -r bde4ae8d615e os/graphics/windowing/windowserver/nga/remotegc/DrawableCache.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/graphics/windowing/windowserver/nga/remotegc/DrawableCache.h	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,89 @@
+// Copyright (c) 2008-2009 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:
+//
+
+#ifndef __DRAWABLECACHE_H__
+#define __DRAWABLECACHE_H__
+
+#include <e32cmn.h>
+#include <graphics/sgresource.h>
+
+#include "W32STD.H"
+
+/**
+@file
+@internalComponent
+Provides functionality which is used by RemoteGc.
+*/
+
+class RWsDrawableSource;
+class MWsDrawableSourceProvider;
+class CGraphicsResourceWrapperFactory;
+class CGraphicsResourceWrapper;
+
+/**
+@internalComponent
+*/
+NONSHARABLE_CLASS(CDrawableCacheBase): public CBase
+	{
+public:
+	virtual TInt UseL(const TSgDrawableId& aDrawableId, TInt aScreenNumber) = 0;
+	const TAny* Resolve(const TSgDrawableId& aDrawableId, TInt aScreenNumber) const;
+protected:
+	class TCacheEntry
+		{
+	public:
+		TCacheEntry(const TSgDrawableId& aDrawableId, TInt aScreenNumber)
+			: iDrawableId(aDrawableId), iScreenNumber(aScreenNumber), iCachedItem(NULL)
+			{}
+	public:
+		TSgDrawableId iDrawableId;
+		TInt iScreenNumber;
+		TAny* iCachedItem;
+		};
+protected:
+	static TInt Compare(const TCacheEntry &aFirstEntry, const TCacheEntry &aSecondEntry);
+protected:
+	RArray<TCacheEntry> iCachedItems;
+	};
+
+/**
+@internalComponent
+*/
+NONSHARABLE_CLASS(CWindowDrawableCache): public CDrawableCacheBase
+	{
+public:
+	CWindowDrawableCache(RWsSession& aSession);
+	~CWindowDrawableCache();
+	TInt UseL(const TSgDrawableId& aDrawableId, TInt aScreenNumber);
+private:
+	RWsSession& iWsSession;
+	CGraphicsResourceWrapperFactory* iGrwFactory;
+	CGraphicsResourceWrapper* iGraphicsResource;
+	};
+
+/**
+@internalComponent
+*/
+NONSHARABLE_CLASS(CRenderStageDrawableCache): public CDrawableCacheBase
+	{
+public:
+	CRenderStageDrawableCache(MWsDrawableSourceProvider* aDrawResource);
+	~CRenderStageDrawableCache();
+	TInt UseL(const TSgDrawableId& aDrawableId, TInt aScreenNumber);
+private:
+	MWsDrawableSourceProvider* iDrawResource;
+	};
+
+#endif //__DRAWABLECACHE_H__