diff -r 8f2c3e21aac9 -r 4d1fe4a7ce83 graphics_plat/guestvideodriver_api/ldd/inc/reqhandlerextension.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/graphics_plat/guestvideodriver_api/ldd/inc/reqhandlerextension.h	Fri Aug 13 15:11:40 2010 +0100
@@ -0,0 +1,62 @@
+// Copyright (c) 2010 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:
+// Guest video driver - request handler extension (a.k.a. Command Scheduler extension)
+// This allows the sgdevice.ldd to make calls into the Command Scheduler
+//
+
+#ifndef ReqHandlerExtension_H
+#define ReqHandlerExtension_H
+
+
+#include <kernel/kernel.h>
+
+#include <sgresource/sgcommon.h>//TSgImageMetaData
+
+#include "virtualvideotracing.h"
+
+class MReqHandlerCallback
+    {
+public:
+	virtual void CreateSgImagePbuffer( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread ) = 0;
+	virtual void CreateSgImageVGImage( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread ) = 0;
+	virtual TInt DestroySgImage( const TUint64 aId ) = 0;    
+    };
+
+NONSHARABLE_CLASS(DReqHandlerExtensionImpl): public DBase
+	{
+public:
+	TInt Construct();
+	void CreateSgImagePbuffer( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread );
+	void CreateSgImageVGImage( const TSgImageMetaData& aInfo, TRequestStatus* aStatus, DThread* aThread );
+	TInt DestroySgImage( const TUint64 aId );
+	TInt SetReqHandler( MReqHandlerCallback* aHandler );
+private:
+	DMutex* iMutex;
+	MReqHandlerCallback* iCallBackHandler;//not owned
+	};
+
+class ReqHandlerExtension
+	{
+public:
+	//SgImage Creation and Destruction commands:
+	IMPORT_C static TInt CreateSgImagePbuffer( const TSgImageMetaData& aInfo );
+	IMPORT_C static TInt CreateSgImageVGImage( const TSgImageMetaData& aInfo );
+	IMPORT_C static TInt DestroySgImage( const TUint64 aId );
+	IMPORT_C static TInt SetReqHandler( MReqHandlerCallback* aHandler );
+	//other functions to be added
+	};
+
+//#include <sgresource/ReqHandlerExtension.inl>
+
+#endif // ReqHandlerExtension_H