/*

* Copyright (c) 2010 Ixonos Plc.

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the "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:

* Ixonos Plc

*

* Description:  

*

*/

#ifndef __CFILTERJPEGSOURCE_H__

#define __CFILTERJPEGSOURCE_H__

#include <e32base.h>

#include "MImageFilter.h"

#include "TBitmapHandle.h"

class MJpegLoad;

class TBlockEntry

    {

	public:

		inline ~TBlockEntry()

			{

			delete iBitmap.iData;

			}

	public:

		TRect iRect;

		TBitmapHandle iBitmap;

	};

class CFilterJpegSource

	: public CBase

	, public MImageFilter

	{

	public:

		IMPORT_C static TInt Create();

		virtual ~CFilterJpegSource();

	private:

		static CFilterJpegSource* NewL();

		CFilterJpegSource();

		void ConstructL();

	public: // MImageFilter

		virtual TRect Rect();

        virtual TReal Scale();

        virtual TSize ViewPortSize();

		virtual TBlock * GetBlockL ( const TRect & aRect );

		virtual void SetParent( MImageFilter* aParent );

		virtual void SetChild( MImageFilter* aChild );

		virtual TInt CmdL( const TDesC16& aCmd );

		virtual const char* Type();

        void LoadRectL();

	private: // Data

        enum TOutputState

        {

            EDirect,

            EBuffer,

        } iOutputState;

        /// decoder instance

		MJpegLoad *     iJpeg;

        //  file name

        TFileName		iFileName;

        //  macroblock size

        TSize           iBlockSize;

        //  image size in macroblocks

        TSize           iSizeInBlocks;

        //  image rectangle

        TRect           iRect;

        //  scaled visible image rectangle

        TRect           iScaledRect;

        //  image size

        TSize           iFullSize;

        //  destination size

        TSize           iDestSize;

        //  destination buffer

        TUint32 *       iDestBuffer;

        //  relative scale

        TReal           iRelScale;

		TBlockEntry **  iBlockBuffer;

		TInt            iXAnd;

		TInt            iYAnd;

		TUint32         iLastBlock;

        TInt *          iIndexMap;

        TInt            iOldestBlock;

	};

#endif