// 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 - logical device driver internal functionality

//

#ifndef SGDEVICEIMPL_H

#define SGDEVICEIMPL_H

#include <kernel/kernel.h>

#include <sgresource/sgdevice.h>

enum TSgDevicePanicReason

	{

	ESgPanicMetaDataSizeTooBig = 1,

	ESgPanicDataSizeNegative = 2

	};

void Panic(TSgDevicePanicReason aReason);

class DSgDevice: public DLogicalDevice

	{

public:

	// From DLogicalDevice

	TInt Install();

	void GetCaps(TDes8& aDes) const;

	TInt Create(DLogicalChannelBase*& aChannel);

	};

class DSgResource;

class DSgChannel: public DLogicalChannelBase

	{

public:

	~DSgChannel();

	// From DLogicalChannelBase

	TInt DoCreate(TInt aUnit, const TDesC8* aInfo, const TVersion& aVersion);

	TInt Request(TInt aFunction, TAny* a1, TAny* a2);

private:

	TInt CreateResource(TUint32 aAttribs, const TDesC8& aMetaData, TInt aDataSize, TUint64& aId);

	TInt OpenResource(TUint64 aId);

	TInt CloseResource(TUint64 aId);

	TUint32 ResourceAttributes(TUint64 aId) const;

	TInt GetResourceMetaData(TUint64 aId, TDes8& aMetaData) const;

	TAny* ResourceDataAddress(TUint64 aId) const;

	TInt ResourceDataSize(TUint64 aId) const;

	TInt GlobalResourceCount() const;

	TInt LocalGraphicsMemoryUsed() const;

	TInt GlobalGraphicsMemoryUsed() const;

private:

	class TResourceListItem

		{

	public:

		TResourceListItem(DSgResource* aResource, TInt aChunkHandle);

	public:

		DSgResource* iResource;

		TInt iChunkHandle;

		};

private:

	static TInt Compare(const TUint64* aId, const TResourceListItem& aResourceListItem);

	static TInt Compare(const TResourceListItem& aResourceListItem1, const TResourceListItem& aResourceListItem2);

private:

	DMutex* iMutex;

	RArray<TResourceListItem> iResources;

	};

#endif // SGDEVICEIMPL_H