// Copyright (c) 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:

// Graphics Resource - kernel extension internal functionality

//

#ifndef SGEXTENSIONIMPL_H

#define SGEXTENSIONIMPL_H

#include <sgresource/sgextension.h>

NONSHARABLE_CLASS(DSgExtensionImpl): public DBase

	{

public:

	TInt Construct();

	TInt CreateResource(TUint32 aAttribs, const TDesC8& aMetaData, TInt aDataSize, DSgResource*& aResource);

	TInt FindAndOpenResource(TUint64 aId, DSgResource*& aResource);

	void DeleteResource(DSgResource* aResource);

	TInt GlobalResourceCount() const;

	TInt GlobalGraphicsMemoryUsed() const;

private:

	DMutex* iMutex;

	TUint64 iLastResourceId;

	RPointerArray<DSgResource> iResources;

	};

NONSHARABLE_CLASS(DSgResourceImpl): public DSgResource

	{

public:

	DSgResourceImpl(DSgExtensionImpl& aExtensionImpl, TUint64 aId, TUint32 aAttribs,

	                const TDesC8& aMetaData, DChunk* aDataChunk, TInt aDataSize);

	// From DSgResource

	TInt Open();

	void Close();

	TUint64 Id() const;

	TUint32 Attributes() const;

	TInt GetMetaData(TDes8& aMetaData) const;

	DChunk* DataChunk() const;

	TInt DataSize() const;

private:

	~DSgResourceImpl();

private:

	DSgExtensionImpl& iExtensionImpl;

	TInt iRefCount;

	TUint64 iId;

	TUint32 iAttributes;

	TInt iMetaDataSize;

	DChunk* iDataChunk;

	TInt iDataSize;

	};

#endif // SGEXTENSIONIMPL_H