1 /*

     2 * Copyright (c) 2002-2007 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: 

    15 *     Class CPbk2ImageManager implementation classes.

    16 *

    17 */

    18 

    19 

    20 #ifndef CPBK2IMAGEWRITERBASE_H

    21 #define CPBK2IMAGEWRITERBASE_H

    22 

    23 //  INCLUDES

    24 #include <e32base.h>

    25 #include "CPbk2ImageManagerImpl.h"

    26 #include "MPbk2ImageReaderObserver.h"

    27 

    28 //  FORWARD DECLARATIONS

    29 class CImageEncoder;

    30 class CBitmapScaler;

    31 class MPbk2ImageData;

    32 //class TPbkImageLoadParameters;

    33 

    34 // CLASS DECLARATION

    35 

    36 /**

    37  * Implementation base class for image writers.

    38  */

    39 NONSHARABLE_CLASS(CPbk2ImageWriterBase) : 

    40         public CActive, 

    41         public MPbk2ImageWriter,

    42         public MPbk2ImageReaderObserver

    43     {

    44     protected: // interface

    45         /**

    46          * Constructor.

    47          * @param aObserver thumbnail set observer

    48          */

    49         CPbk2ImageWriterBase(MPbk2ImageSetObserver& aObserver);

    50 

    51         /**

    52          * Second phase constructor.

    53          */

    54         void ConstructL();

    55 

    56         /**

    57          * Destructor. Cancels any previously executing read operation and

    58          * destroys this object.

    59          */

    60         ~CPbk2ImageWriterBase();

    61 

    62     private:  // Abstract interface for derived classes

    63         /**

    64          * Creates an image writer for the thumbnail image to store.

    65          *

    66          * @return  New image writer object. Caller takes ownership of the 

    67          *          returned object.

    68          */

    69         virtual CImageEncoder* CreateImageWriterL() =0;

    70 

    71         /**

    72          * Stores image in aImageData as the thumbnail image.

    73          *

    74          * @param aImageData Images data

    75          */

    76         virtual void StoreImageL(const MPbk2ImageData& aImageData) =0;

    77 

    78         /**

    79          * Stores image created with writer returned by CreateImageWriterL().

    80          * @param aImageWriter image writer

    81          */

    82         virtual void StoreImageL(CImageEncoder& aImageWriter) =0;

    83 

    84         /**

    85          * Returns the image size

    86          * @return Image size

    87          */

    88          virtual TSize ImageSize() const = 0;

    89 

    90     public:  // from MPbkThumbnailWriter

    91         void StartWriteL(const CFbsBitmap& aBitmap);

    92         void StartWriteL(const TDesC8& aBuffer);

    93         void StartWriteL(const TDesC& aFileName);

    94         void CancelWrite();

    95 

    96     private:  // from MPbkImageReaderObserver

    97         void ImageReadComplete(CPbk2ImageReader& aReader, CFbsBitmap* aBitmap);

    98         void ImageReadFailed(CPbk2ImageReader& aReader, TInt aError);

    99         void ImageOpenComplete(CPbk2ImageReader& aReader);

   100 

   101     protected: // From CActive

   102         void DoCancel();

   103 

   104     private: // From CActive

   105         void RunL();

   106         TInt RunError(TInt aError);

   107 

   108     private:  // Implementation

   109         void NextState();

   110         void ExecuteStateL();

   111         void CheckFormatAndSizeL();

   112         void ScaleBitmapL();

   113         void CreateImageL();

   114         void ConvertToJpegL();

   115         void StoreImageL();

   116         void Complete();

   117         static TInt Complete(TAny* aSelf);

   118         void SetupReaderParams(TPbk2ImageManagerParams& aParams);

   119         

   120     private: // data members

   121         /// Ref: observer

   122         MPbk2ImageSetObserver& iObserver;

   123         /// Own: current state

   124         TInt iState;

   125         /// Own: image reader

   126         CPbk2ImageReader* iImageReader;

   127         /// Own: input image data

   128         MPbk2ImageData* iImageData;

   129         /// Own: bitmap to store

   130         CFbsBitmap* iBitmap;

   131         /// Own: bitmap scaler

   132         CBitmapScaler* iBitmapScaler;

   133         /// Own: image writer

   134         CImageEncoder* iImageEncoder;

   135     };

   136 

   137 #endif // CPBK2IMAGEWRITERBASE_H

   138 

   139 // End of File