/*

* 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:     

*

*/

#ifndef HGVGDRAWBUFFER_H_

#define HGVGDRAWBUFFER_H_

// INCLUDES

#include <e32base.h>

#include <VG/openvg.h>

#include <gulcolor.h>

/**

 * Helper class for rendering graphics to offscreen buffer

 * using avkon and then copying that buffer to OpenVG images.

 */

NONSHARABLE_CLASS(CHgVgDrawBuffer) : public CBase

    {

public:

    /**

     * Creates new CHgVgDrawBuffer

     * 

     * @param aDrawBufferSize

     * @param aDisplayMode

     * @return HgVgDrawBuffer-object

     */

    static CHgVgDrawBuffer* NewL (const TSize& aDrawBufferSize, const TDisplayMode& aMode); 

    // Destructor.

    virtual ~CHgVgDrawBuffer();

public: // METHODS

    /**

     * Getter for buffer size in pixels.

     * 

     * @return buffer size in pixels.

     */

    const TSize& BufferSize() const;

    /**

     * Getter for draw context.

     * 

     * @return reference to CFbsBitGc-object.

     */

    CFbsBitGc& Gc();

    /**

     * 

     */

    CFbsBitmap& DrawBuffer();

    /**

     * Clears draw buffer

     * 

     * @param aColor color to clear.

     */

    void Clear(const TRect& aRect, const TRgb& aColor);

    /**

     * Draws text to draw buffer.

     * 

     * @param aText text.

     * @param aFont font to use for text rendering.

     * @param aColor color to use for text rendering.

     * @param aPosition position to render.

     */

    void DrawText(const TDesC& aText, const CFont* aFont, 

            const TRgb& aColor, const TPoint& aPosition);

    /**

     * Gets drawbuffer to VGImage.

     * 

     * @param aSrcRect rectangle in draw buffer to copy to the image.

     * @param aDestRect rectangle in image.

     * @param aDestImage destination image.

     */

    void GetDrawBufferToVgImage(const TRect& aSrcRect, 

            const TPoint& aDest, VGImage destImage, VGImageFormat destFormat);

protected: // Constructors

    CHgVgDrawBuffer( );

    void ConstructL (const TSize& aBufferSize, const TDisplayMode& aMode );

private: // Data

    CFbsBitmapDevice* iDevice; // owns

    CFbsBitmap* iDrawBuffer; // owns

    CFbsBitGc* iGc; // owns

    TSize iBufferSize;

    };

#endif /* HGVGDRAWBUFFER_H_ */