// 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:

 //

 #include "BitmapCache.h"

 CBitmapCache::CBitmapCache() : CCacheBase()

 	{

 	}

 CBitmapCache::~CBitmapCache()

 	{

 	}

 /**

 Enables the use of a cached bitmap with a specified handle.

 If no bitmap with this handle is cached, the bitmap is created and cached.

 @return KErrNone if no problem occured, otherwise a systemwide error.

 */

 TInt CBitmapCache::UseL(TInt aHandle)

 	{

 	TCacheEntry entry(aHandle);

 	TInt index = iCachedItems.FindInUnsignedKeyOrder(entry);

 	if(index != KErrNotFound)

 		{

 		iCachedItems[index].iIsUsed = ETrue;

 		return KErrNone;	

 		}

 	entry.iCachedItem = new (ELeave) CFbsBitmap;	

 	TInt err = static_cast<CFbsBitmap*>(entry.iCachedItem)->Duplicate(aHandle);

 	if(err)

 		{

 		delete entry.iCachedItem;

 		return err;

 		}

 	entry.iIsUsed = ETrue;		

 	CleanupStack::PushL(entry.iCachedItem);

 	iCachedItems.InsertInUnsignedKeyOrderL(entry);

 	CleanupStack::Pop(entry.iCachedItem);	

 	return KErrNone;

 	}

 /**

 Returns a bitmap from the cache corresponding to a specific handle.

 @param aHandle A handle to match against a bitmap in the cache.

 @return The bitmap that matches the handle provided as a parameter.

 */

 const CFbsBitmap* CBitmapCache::Resolve(TInt aHandle)

 	{	

 	const CBase* item = CCacheBase::Resolve(aHandle);

 	if(item != NULL)

 		return static_cast<const CFbsBitmap*>(item);

 	else

 		return NULL;

 	}