/*

* Copyright (c) 2008 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 HUIFXRENDERBUFFER_H_

#define HUIFXRENDERBUFFER_H_

#include "HuiFxConstants.h"

#include <uiacceltk/HuiGc.h>

class CHuiFxRenderbuffer: public CBase

    {

protected:

    IMPORT_C CHuiFxRenderbuffer();

    // TODO: luminance-only render buffers

    // TODO: optional alpha channel?

    IMPORT_C void ConstructL(const TSize& aSize, TRenderBufferType aBufferType);

public:

    IMPORT_C virtual ~CHuiFxRenderbuffer();

    virtual CHuiGc& BindAsRenderTarget() = 0;

    virtual void BindAsTexture(THuiFxRenderbufferUsage aUsage) = 0;

    virtual void UnbindAsRenderTarget() = 0;

    virtual void UnbindAsTexture() = 0;

    virtual void PrepareForReuse(const TSize& aReusedSize) = 0;

    IMPORT_C const TSize& Size() const;

    IMPORT_C const TRenderBufferType& BufferType() const;

    // Position relative to screen coordinates

    IMPORT_C void SetPosition(TPoint aPosition);

    IMPORT_C const TPoint& Position() const;

    // Background is read (or not) from current surface when PrepareForReuse is called.

    IMPORT_C void EnableBackground(TBool aEnable); 

protected:    

    TSize                iSize;

    TRenderBufferType    iType;

    TPoint               iPosition;

    TBool                iBackgroundEnabled;

    };

#endif /*HUIFXRENDERBUFFER_H_*/