// 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