/*

* 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:  Task for decoding  a thumbnail

 *

*/

#ifndef THUMBNAILDECODETASK_H

#define THUMBNAILDECODETASK_H

#include <apmstd.h>

#include "thumbnailtask.h"

#include "thumbnailprovider.h"

class CThumbnailServer;

/**

 *  Task for decoding a thumbnail.

 *

 *  @since S60 v5.0

 */

class CThumbnailDecodeTask: public CThumbnailTask,

    public MThumbnailProviderObserver

    {

public:

    /**

     * C++ default constructor

     *

     * @since S60 v5.0

     * @param aProcessor Processor object for running tasks.

     * @param aServer Thumbnail server in use.

     * @param aBuffer Image in JPEG mode.

     * @param aPriority Priority of the request.

     * @return New CThumbnailDecodeTask object.

     */

    CThumbnailDecodeTask( CThumbnailTaskProcessor& aProcessor, CThumbnailServer& aServer, TDesC8* aBuffer,

            TInt aPriority, TDisplayMode aDisplayMode);

    /**

     * Destructor.

     *

     * @since S60 v5.0

     */

    virtual ~CThumbnailDecodeTask();

    /**

     * StartL

     *

     * @since S60 v5.0

     */

    void StartL();

    /**

     * Handles an active object's request completion event.

     *

     * @since S60 v5.0

     */

    void RunL();

    /**

     * Implements cancellation of an outstanding request.

     *

     * @since S60 v5.0

     */

    void DoCancel();

private:

   /**

     * For notifying when task has been finished.

     *

     * @since S60 v5.0

     * @param aError Error code.

     * @param aBitmap Thumbnail image.

     * @param aOriginalSize Original image size.

     */

    void ThumbnailProviderReady( const TInt aError, CFbsBitmap* aBitmap, const

        TSize& aOriginalSize, const TBool aEXIF, const TBool aPortait );

private:

    // Data

    /**

     * Server.

     */

    CThumbnailServer& iServer;

    /**

     * Image buffer

     */    

    TDesC8* iBuffer;

    /**

     * Size of the original image.

     */

    TSize iOriginalSize;

    /**

     * Thumbnail provider implementation.

     * Not own.

     */

    CThumbnailProvider* iProvider;

    /**

     * If set, scaled bitmap must be released from pool.

     */

   TInt iBitmapHandle;

   /**

    * Temporary buffer for client/server parameters

    */

    TThumbnailRequestParamsPckgBuf iParamsBuf;

    /*

     * Displaymode of requested TN

     */

    TDisplayMode iDisplayMode;

};

#endif // THUMBNAILGENERATETASK_H