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:  Image thumbnail decoderv2.

    15  *

    16 */

    17 

    18 

    19 #ifndef THUMBNAILIMAGEDECODERV2_H

    20 #define THUMBNAILIMAGEDECODERV2_H

    21 

    22 #include "thumbnailprovider.h"

    23 

    24 class CImageDecoder;

    25 class CFbsBitmap;

    26 

    27 /**

    28  *  Image thumbnail decoder.

    29  *

    30  *  @since S60 v5.0

    31  */

    32 class CThumbnailImageDecoderv2: public CActive

    33     {

    34 public:

    35 

    36     /**

    37      * C++ default constructor

    38      *

    39      * @since S60 v5.0

    40      * @param aFs File server session

    41      * @return New image thumbnail decoder instance.

    42      */

    43     CThumbnailImageDecoderv2( RFs& aFs);

    44 

    45     /**

    46      * Destructor

    47      *

    48      * @since S60 v5.0

    49      */

    50     virtual ~CThumbnailImageDecoderv2();

    51 

    52     /**

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

    54      * information

    55      *

    56      * @since S60 v5.0

    57      * @param aBuffer Source image buffer.

    58      * @param aObserver Observer to relay notifications about completed

    59      *                  operations.

    60      */    

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

    62     

    63     /**

    64      * Decode image.

    65      *

    66      * @since S60 v5.0

    67      * @param aDisplayMode Preferred display mode.

    68      */

    69     void DecodeL();

    70 

    71 private:

    72     /**

    73      * Used to release reserved resources.

    74      *

    75      * @since S60 v5.0

    76      */

    77     void Release();

    78 

    79     /**

    80      * Implements cancellation of an outstanding request.

    81      *

    82      * @since S60 v5.0

    83      */

    84     void DoCancel();

    85 

    86     /**

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

    88      *

    89      * @since S60 v5.0

    90      */

    91     void RunL();

    92 

    93     /**

    94      * Creates image decoder to be used.

    95      *

    96      * @since S60 v5.0

    97      */

    98     void CreateDecoderL();

    99 

   100 private:

   101     // data

   102 

   103    /**

   104      * Image decoder.

   105      * Own.

   106      */

   107     CImageDecoder* iDecoder;

   108 

   109     /**

   110      * Original size of the image in pixels.

   111      */

   112     TSize iOriginalSize;

   113     

   114     /**

   115      * Decoded bitmap.

   116      * Own.

   117      */

   118     CFbsBitmap* iBitmap;

   119 

   120    /**

   121      * Used fileserver.

   122      */

   123     RFs& iFs;

   124 

   125     /**

   126      * Buffer from which thumbnail is to be created.

   127      */    

   128     TDesC8* iBuffer;

   129 

   130     /**

   131      * Observer.

   132      */

   133     MThumbnailProviderObserver* iObserver; // not own

   134 };

   135 

   136 #endif // THUMBNAILIMAGEDECODERV2_H