webengine/widgetinstaller/Inc/IconConverter.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 18 Jan 2010 21:20:18 +0200
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/*
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* Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of the License "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:  Icon convert to convert icon for png to mbm format
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*
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*/
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#ifndef __ICONCONVERTER_H__
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#define __ICONCONVERTER_H__
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// INCLUDES
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#include <e32std.h>
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#include <e32base.h>
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#include <f32file.h>
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// FORWARD DECLARATION
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class CFbsBitmap;
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class CBitmapScaler;
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class CImageDecoder;
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//namespace SwiUI
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//{
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class MConverterController;
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/*
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* Inherited CActive, performs a asynchronous conversion operation
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*
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* @lib WidgetInstallerUI.lib
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* @since 3.1
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*/
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class CIconConverter : public CActive
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    {
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    // states for this engine
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    enum TState
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        {
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        EIdle = 0,
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        EDecoding,
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        EConvertingFile,
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        EScalingIcon,
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        EScalingMask,
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        EStoringIcon,
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        EFinalize
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        };
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    public:
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        public: // contructors/destructors
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        /*
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        * NewL
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        *
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        * Create a CIconConverter object and return a pointer to it.
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        *
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        * Params:
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        *      aController Pointer to a MConverterController interface.
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        *      The engine uses NotifyCompletionL callback from this interface
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        *      to notify the controller about completions of coding or
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        *      encoding requests.
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        *
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        * Returns:
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        *       A pointer to the created engine
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        *
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        */
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        static CIconConverter* NewL( MConverterController* aController , RFs& aFs );
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        /*
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        * ~CIconConverter
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        *
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        * Destructor
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        *
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        */
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        ~CIconConverter();
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    public: // interface methods
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        /*
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        * StartToDecodeL
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        *
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        * Starts to decode an image from a file. When completed calls
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        * NotifyCompletionL, from iController.
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        *
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        * @Params:
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        *       aFileName Full path and filename of the image to be decoded.
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void StartToDecodeL( const TDesC& aInputFileName, const TDesC& aOutputFileName );
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    protected: // implementation of CActive
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        /*
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        * From CActive
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        *
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        * Handle the cancel operation
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        *
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        */
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        void DoCancel();
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        /*
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        * From CActive
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        *
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        * Handle the conversion process
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        *
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        */
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        void RunL();
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        /*
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        * From CActive
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        * Handle the error situations
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        */
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        TInt RunError( TInt aError );
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    private: // internal methods, constructors
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        /*
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        * CIconConverter
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        *
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        * C++ Constructor
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        *
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        */
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        CIconConverter( MConverterController* aController, RFs& aFs );
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        /*
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        * ConstructL
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        *
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        * 2-phase constructor
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void ConstructL();
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        /*
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        * GetTempIconName
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        *
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        * Get temporary icon name
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void GetTempIconName( TInt aIndex, TFileName& aIconName );
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        /*
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        * DoCreateFinalIconL
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        *
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        * Create the final icon
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoCreateFinalIconL();
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        /*
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        * DoIconStoreL
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        *
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        * Store icon and mask files
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoIconStoreL();
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        /*
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        * ScalerL
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        *
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        * Create bitmap scalar
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        *
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        * @Returns:
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        *       CBitmapScaler
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        */
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        CBitmapScaler& ScalerL();
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        /*
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        * DoScalingL
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        *
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        * Scale
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoScalingL( CFbsBitmap& aBitmapSource, CFbsBitmap& aBitmapTarget );
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        /*
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        * DoMaskScalingL
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        *
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        * Scale the mask
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoMaskScalingL();
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        /*
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        * DoIconScalingL
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        *
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        * Scale the bitmap
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoIconScalingL();
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        /*
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        * DoProcessMaskL
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        *
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        * Process the mask for the bitmap
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        *
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        * @Returns:
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        *       Nothing
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        */
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        void DoProcessMaskL();
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    private: // internal data
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        // The client's pending status
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        TRequestStatus*         iClientStatus;
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        MConverterController*   iController; // ui controller, owned
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        RFs                     iFs; // for opening/saving images from/to files, not owned
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        CImageDecoder*          iImageDecoder; // decoder from ICL API, owned
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        HBufC*                  iOutputFileName; // the resulted file name, owned
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        TState                  iState; // state of the conversion
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        CArrayFixFlat<TSize>*   iIconSizes;
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        // Original bitmap pointers garnered from the PNG in the midlet
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        CFbsBitmap*             iOriginalBitmap;
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        CFbsBitmap*             iOriginalBitmapMask;
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        // Scaled target bitmaps
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        CFbsBitmap*             iTempBitmap;
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        CFbsBitmap*             iTempBitmapMask;
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        // Bitmap scaler
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        CBitmapScaler*          iScaler;
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        // The current size icon being converted
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        TInt                    iCurrentSizeIndex;
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        // Icon file
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        RFile                   iIconFile;
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        RFile                   iIconPngFile;
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        // Path to create Temp icons
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        const HBufC*            iTempPath;
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    };
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//}
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#endif // #ifndef __ICONCONVERTER_H__