// Copyright (c) 2006-2009 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:

 // surface

 // 

 //

 /**

  @file

  @publishedPartner

  @released

 */

 #ifndef __SURFACE_H__

 #define __SURFACE_H__

 #include <e32def.h>

 class TSurfaceId

 	{

 	public:

 	enum

 		{

 		EInvalidSurface = 0,

 		EScreenSurface = 1,

 		EStreamHandle = 2,

 		EAdaptationSurfaceBase = 33,

 		};

 	struct TSurfaceUsage 			 //TSurfaceId::TSurfaceUsage::

 		{

 		enum	

 			{

 			//screen usage

 			EScreenField=0,

 			EHalField=1,

 			EHalFlippedFlag=0x80000000,

 			ETypeGuidField=2,

 			//stream handle usage

 			EObjectRefField=0,

 			//general class usage

 			ETypeClassField=3,

 			ETypeClassShift=24

 			};

 		};

 	typedef TSurfaceUsage TScreenSurfaceUsage; 			 //Backward compatibility

 	inline static TSurfaceId CreateNullId(void) 

 		{

 		TSurfaceId id = TSurfaceId();

 		for (TInt i = 0; i < 4; ++i) id.iInternal[i] = 0; 

 		return id;

 		};

 	inline TBool IsNull() const 

 		{

 		return ((iInternal[0] == 0) &&

 				(iInternal[1] == 0) &&

 				(iInternal[2] == 0) &&

 				(iInternal[3] == 0));

 		};

 	inline TInt Type() const {return (TInt)(iInternal[3] >> 24);}

 	public:

 	TUint32 iInternal[4];

 	};

 inline bool operator == (const TSurfaceId& lhs, const TSurfaceId& rhs)

 	{

 	return ((lhs.iInternal[0] == rhs.iInternal[0]) &&

 			(lhs.iInternal[1] == rhs.iInternal[1]) &&

 			(lhs.iInternal[2] == rhs.iInternal[2]) &&

 			(lhs.iInternal[3] == rhs.iInternal[3]));

 	}

 inline bool operator != (const TSurfaceId& lhs, const TSurfaceId& rhs)

 	{

 	return !(lhs == rhs);

 	}

 #endif