1 /*

     2 * Copyright (c) 2008-2009 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 to generate a cropped thumbnail for a JPEG image.

    15 *

    16 */

    17 

    18 

    19 

    20 /**

    21  * @internal reviewed 30/07/2007 by Simon Brooks

    22  */

    23 

    24 

    25 #ifndef C_GLXTNZOOMEDIMAGETASK_H

    26 #define C_GLXTNZOOMEDIMAGETASK_H

    27 

    28 #include "glxtntask.h"

    29 

    30 #include <glxthumbnailinfo.h>   // For TGlxThumbnailFilter

    31 

    32 class CGlxtnFileInfo;

    33 class CGlxtnFileUtility;

    34 class TGlxThumbnailRequest;

    35 class CFbsBitmap;

    36 class CExtJpegDecoder;

    37 

    38 /**

    39  * Task to generate a cropped thumbnail for a JPEG image.

    40  *

    41  * @ingroup glx_thumbnail_creator

    42  */

    43 NONSHARABLE_CLASS(CGlxtnZoomedImageTask) : public CGlxtnClientTask

    44     {

    45 public:

    46     /**

    47     * Two-phased constructor.

    48     */

    49 	static CGlxtnZoomedImageTask* NewL(

    50 	    const TGlxThumbnailRequest& aRequestInfo,

    51 	    CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient);

    52 	~CGlxtnZoomedImageTask();

    53 

    54 protected:  // From CGlxtnTask

    55     virtual TBool DoStartL(TRequestStatus& aStatus);

    56 	virtual void DoCancel();

    57 	virtual TBool DoRunL(TRequestStatus& aStatus);

    58     TBool DoRunError(TInt aError);

    59 

    60 private:

    61     CGlxtnZoomedImageTask(const TGlxThumbnailRequest& aRequestInfo,

    62         CGlxtnFileUtility& aFileUtility, MGlxtnThumbnailCreatorClient& aClient);

    63 	void ConstructL(TInt aBitmapHandle);

    64 

    65     void DecodePartialImageL(TRequestStatus& aStatus);

    66     void CreateDecoderL(TInt aDecoderType);

    67 

    68 private:

    69     enum TTaskState

    70         {

    71         EStateFetchingUri, EStateDecoding, EStateProcessing

    72         };

    73 

    74     /** File utility (not owned) */

    75     CGlxtnFileUtility& iFileUtility;

    76     /** File information for item to thumbnail */

    77     CGlxtnFileInfo* iInfo;

    78 	/** Current state for task state machine */

    79     TTaskState iState;

    80     /** Bitmap for the generated thumbnail */

    81     CFbsBitmap* iThumbnail;

    82     /** Decoder for the JPEG file */

    83     CExtJpegDecoder* iDecoder;

    84     /** Requested thumbnail size */

    85     TSize iRequestedSize;

    86     /** Part of image to keep */

    87     TRect iCroppingRect;

    88     /** Filtering to apply to generated image */

    89     TGlxThumbnailFilter iFilter;

    90     /** DRM allowed flag passed from thumbnail request */

    91     TBool iDrmAllowed;

    92     /** Whether current file is DRM protected */

    93     TBool iProtected;

    94     };

    95         

    96 #endif  // C_GLXTNZOOMEDIMAGETASK_H