/*

* Copyright (c) 2002 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:  Image conversion class

*

*/

#ifndef BTSU_IMAGE_CONVERTER_H

#define BTSU_IMAGE_CONVERTER_H

// INCLUDES

#include <f32file.h>

#include <badesca.h>

// CONSTANTS

// FORWARD DECLARATIONS

class CImageDecoder;

class CImageEncoder;

class CFrameImageData;

class CBitmapScaler;

class CFbsBitmap;

// CLASS DECLARATION

/**

* A class for executing simple image conversion tasks.

*/

NONSHARABLE_CLASS (CBTSUImageConverter) : public CActive

    {

    public:  // Constructor and destructor

        /**

        * Two-phased constructor.        

        * @param None.

        */

        static CBTSUImageConverter* NewL();

        /**

        * Destructor.

        */

        ~CBTSUImageConverter();

    public: // New functions        

        /**

        * Returns the pixel size of the given image.

        * @param aImageFile A file handle of image file.

        * @return The pixel size.

        */

        TSize GetImageSizeL( RFile&  aImageFile );        

        /**

        * Create a thumbnail version of the source image.

        * @param aSourceFile A filehandle of sourcefile.

        * @param aDestFile   Full path for the destination file.

        * @return None.

        */

        void CreateThumbnailL( RFile& aSourceFile, 

                               const TDesC& aDestFile );

        /**

        * Finds a display name for the given mime type.

        * @param aMimeType Mime type

        * @return A pointer to the name.

        */

        static HBufC* GetDisplayNameL( const TDesC8& aMimeType );

    private: // Functions from base classes

        /**

        * From CActive Get's called when a request is cancelled.

        * @return None.

        */

        void DoCancel();

        /**

        * From CActive Get's called when a request is completed.

        * @return None.

        */

        void RunL();

    private:

        /**

        * C++ default constructor.

        */

        CBTSUImageConverter();

        /**

        * Symbian 2nd phase constructor.

        */

        void ConstructL();

        /**

        * Decode image.

        * @param aSourceFile A filehandle of source file.

        * @return None

        */

        void DecodeImageL( RFile& aSourceFile );

        /**

        * Encode image.

        * @param aDestFile Full path for the destination file.

        * @param aThumbnail ETrue enables thumbnail creation

        * @return None

        */

        void EncodeImageL( const TDesC& aDestFile,

                           const TBool& aThumbnail = EFalse );

        /**

        * Scale image.

        * @return None

        */

        void ScaleImageL();

        /**

        * Reset internal state.

        * @return None.

        */

        void Reset();

    private: // Data

        CImageDecoder*              iDecoder;

        CImageEncoder*              iEncoder;

        CBitmapScaler*              iScaler;

        CFrameImageData*            iFrameImageData;

        CFbsBitmap*                 iFrameBitmap;

        CFbsBitmap*                 iScaledBitmap;

        RFs                         iFileSession;

        CActiveSchedulerWait        iWait;

    };

#endif // BTSU_IMAGE_CONVERTER_H