commonutilities/imagedecoderwrapper/inc/glximagedecoder.h
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/*
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* Copyright (c) 2009 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 "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:   ?Description
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*
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*/
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#ifndef GLXIMAGEDECODER_H
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#define GLXIMAGEDECODER_H
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#include <QPixmap>
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#include <f32file.h> 
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#include "glximagedecoderwrapper.h"
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class GlxImageDecoderWrapper;
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class CImageDecoder;
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class CFbsBitmap;
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const TReal KTargetSize = 1000000;
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//if any image is converted to Pixmap with an dimension > 2048 
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//the conversion will fail
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const TInt KMaxDimensionLimit = 2000;
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class CGlxImageDecoder : public CActive
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{
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public:
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	static CGlxImageDecoder* NewL(GlxImageDecoderWrapper* decoderWrapper);
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	~CGlxImageDecoder();
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    QSizeF DecodeImageL(QString aSourceFileName);
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	QPixmap GetPixmap();
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	void ResetDecoder();
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public:    
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    /**
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     * Standard Active object functions
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     * */
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    virtual void RunL();
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    virtual void DoCancel();
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private:
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    /*
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     * Constructor
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     * */
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    CGlxImageDecoder();
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	/*
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     *Second-phase constuction 
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     * */
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    void ConstructL(GlxImageDecoderWrapper* decoderWrapper);
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    /*
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     * Checks if the mimetype needs recalculations
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     * @returnType false if jpeg
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     * true otheriwise 
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     */
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    TBool DoesMimeTypeNeedsRecalculateL(QString aSourceFileName);
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    /*
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     * Does the recalculation and returns back the correct size
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     * @returntype Size of the decoded bitmap
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     */
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    TSize ReCalculateSizeL(QString aSourceFileName, TSize aDestSize);
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private:
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	GlxImageDecoderWrapper* iDecoderWrapper;
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	/*Specifies the Decoder */
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    CImageDecoder*          iImageDecoder; // decoder from ICL API
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	/*Contains the Bitmap generated*/
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    CFbsBitmap* iBitmap;
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	/*Contains the bitmap in QT format8*/
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	QPixmap iDecodedPixmap;
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	/*A handle to a file server session.*/ 
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    RFs iFs;
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};
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#endif //GLXIMAGEDECODER_H