// 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__