1 /*

     2 * Copyright (c) 2006-2007 Nokia Corporation and/or its subsidiary(-ies). 

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Task for decoding  a thumbnail

    15  *

    16 */

    17 

    18 

    19 #ifndef THUMBNAILDECODETASK_H

    20 #define THUMBNAILDECODETASK_H

    21 

    22 #include <apmstd.h>

    23 

    24 #include "thumbnailtask.h"

    25 #include "thumbnailprovider.h"

    26 

    27 

    28 class CThumbnailServer;

    29 

    30 /**

    31  *  Task for decoding a thumbnail.

    32  *

    33  *  @since S60 v5.0

    34  */

    35 class CThumbnailDecodeTask: public CThumbnailTask,

    36     public MThumbnailProviderObserver

    37     {

    38 public:

    39 

    40     /**

    41      * C++ default constructor

    42      *

    43      * @since S60 v5.0

    44      * @param aProcessor Processor object for running tasks.

    45      * @param aServer Thumbnail server in use.

    46      * @param aBuffer Image in JPEG mode.

    47      * @param aPriority Priority of the request.

    48      * @return New CThumbnailDecodeTask object.

    49      */

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

    51             TInt aPriority, TDisplayMode aDisplayMode);

    52 

    53     /**

    54      * Destructor.

    55      *

    56      * @since S60 v5.0

    57      */

    58     virtual ~CThumbnailDecodeTask();

    59 

    60     /**

    61      * StartL

    62      *

    63      * @since S60 v5.0

    64      */

    65     void StartL();

    66 

    67     /**

    68      * Handles an active object's request completion event.

    69      *

    70      * @since S60 v5.0

    71      */

    72     void RunL();

    73 

    74     /**

    75      * Implements cancellation of an outstanding request.

    76      *

    77      * @since S60 v5.0

    78      */

    79     void DoCancel();

    80 

    81 private:

    82 

    83    /**

    84      * For notifying when task has been finished.

    85      *

    86      * @since S60 v5.0

    87      * @param aError Error code.

    88      * @param aBitmap Thumbnail image.

    89      * @param aOriginalSize Original image size.

    90      */

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

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

    93 

    94 

    95 private:

    96     // Data

    97 

    98     /**

    99      * Server.

   100      */

   101     CThumbnailServer& iServer;

   102   

   103     /**

   104      * Image buffer

   105      */    

   106     TDesC8* iBuffer;

   107 

   108     /**

   109      * Size of the original image.

   110      */

   111     TSize iOriginalSize;

   112 

   113     /**

   114      * Thumbnail provider implementation.

   115      * Not own.

   116      */

   117     CThumbnailProvider* iProvider;

   118     

   119     /**

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

   121      */

   122    TInt iBitmapHandle;

   123    

   124    /**

   125     * Temporary buffer for client/server parameters

   126     */

   127     TThumbnailRequestParamsPckgBuf iParamsBuf;

   128     

   129     /*

   130      * Displaymode of requested TN

   131      */

   132     TDisplayMode iDisplayMode;

   133     

   134 };

   135 

   136 #endif // THUMBNAILGENERATETASK_H