/*

* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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:  

*

*/

#ifndef __STATICIMAGEDECODER_H_

#define __STATICIMAGEDECODER_H_

#include <e32base.h>

#include <e32std.h>

#include "AnimationDecoder.h"

class CFbsBitmap;

class CMaskedBitmap;

class TFrameInfo;

class CBufferedImageDecoder;

struct CRawData : public CBase

    {

    static CRawData* NewL( const TDesC8& aData, TDesC* aMime, 

           CMaskedBitmap* aTarget, MAnimationDecoderObserver* aObserv );

    virtual ~CRawData();

    CRawData() : iData(0), iDataPtr(0,0), iMime(0), iTarget(0), iObserver(0) {}

    void ConstructL(const TDesC8& aData, TDesC* aMime, 

        CMaskedBitmap* aTarget, MAnimationDecoderObserver* aObserv );

    TAny*           iData;

    TPtr8           iDataPtr;

    HBufC8*         iMime;

    CMaskedBitmap*  iTarget;

    MAnimationDecoderObserver* iObserver;

    };

class CStaticImageDecoder : public CActive

    {

    public:

        enum TDecodingState

            {

            EIdle,

            EStartLoading,

            EOneFrameReady

            };

        // constructor

        static CStaticImageDecoder* NewL();

        virtual ~CStaticImageDecoder();

        // decode the image asynchorously

        TBool DecodeL( CRawData* aData  );

        void StopObserving( MAnimationDecoderObserver* aObserv );

        // from CActive

        void RunL();

        void DoCancel();

    private:

        CStaticImageDecoder();

        TBool LoadNextImage();

        void  LoadOneFrame();

        void StartLoading();

        TDisplayMode GetBestDisplayMode(TDisplayMode) const;

        TBool CheckBitmapMemoryConsumption( const TFrameInfo& aFrameInfo ) const;

        void ConstructL();

        void Reset();

        CBufferedImageDecoder*  iDecoder;   // owned

        TDecodingState          iState;

        RPointerArray<CRawData> iQueue;

        CRawData*               iContext;   // current decoding data

    };

#endif //!__STATICIMAGEDECODER_H_