/*

* Copyright (c) 2006-2007 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:  Image thumbnail decoderv2.

 *

*/

#ifndef THUMBNAILIMAGEDECODERV2_H

#define THUMBNAILIMAGEDECODERV2_H

#include "thumbnailprovider.h"

class CImageDecoder;

class CFbsBitmap;

/**

 *  Image thumbnail decoder.

 *

 *  @since S60 v5.0

 */

class CThumbnailImageDecoderv2: public CActive

    {

public:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     * @param aFs File server session

     * @return New image thumbnail decoder instance.

     */

    CThumbnailImageDecoderv2( RFs& aFs);

    /**

     * Destructor

     *

     * @since S60 v5.0

     */

    virtual ~CThumbnailImageDecoderv2();

    /**

     * Creates a decoder from the given image buffer and gets image

     * information

     *

     * @since S60 v5.0

     * @param aBuffer Source image buffer.

     * @param aObserver Observer to relay notifications about completed

     *                  operations.

     */    

    void CreateL(TDesC8& aBuffer, MThumbnailProviderObserver& aObserver);    

    /**

     * Decode image.

     *

     * @since S60 v5.0

     * @param aDisplayMode Preferred display mode.

     */

    void DecodeL();

private:

    /**

     * Used to release reserved resources.

     *

     * @since S60 v5.0

     */

    void Release();

    /**

     * Implements cancellation of an outstanding request.

     *

     * @since S60 v5.0

     */

    void DoCancel();

    /**

     * Handles an active object's request completion event.

     *

     * @since S60 v5.0

     */

    void RunL();

    /**

     * Creates image decoder to be used.

     *

     * @since S60 v5.0

     */

    void CreateDecoderL();

private:

    // data

   /**

     * Image decoder.

     * Own.

     */

    CImageDecoder* iDecoder;

    /**

     * Original size of the image in pixels.

     */

    TSize iOriginalSize;

    /**

     * Decoded bitmap.

     * Own.

     */

    CFbsBitmap* iBitmap;

   /**

     * Used fileserver.

     */

    RFs& iFs;

    /**

     * Buffer from which thumbnail is to be created.

     */    

    TDesC8* iBuffer;

    /**

     * Observer.

     */

    MThumbnailProviderObserver* iObserver; // not own

};

#endif // THUMBNAILIMAGEDECODERV2_H