1 /*

     2 * Copyright (c) 2010 Ixonos Plc.

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - Initial contribution

    11 *

    12 * Contributors:

    13 * Ixonos Plc

    14 *

    15 * Description:  

    16 *

    17 */

    18 

    19 

    20 #ifndef __CFILTERJPEGSOURCE_H__

    21 #define __CFILTERJPEGSOURCE_H__

    22 

    23 #include <e32base.h>

    24 #include "MImageFilter.h"

    25 #include "TBitmapHandle.h"

    26 

    27 

    28 class MJpegLoad;

    29 

    30 class TBlockEntry

    31     {

    32 	public:

    33 		inline ~TBlockEntry()

    34 			{

    35 			delete iBitmap.iData;

    36 			}

    37 	public:

    38 		TRect iRect;

    39 		TBitmapHandle iBitmap;

    40 	};

    41 

    42 

    43 

    44 class CFilterJpegSource

    45 	: public CBase

    46 	, public MImageFilter

    47 	{

    48 	public:

    49 		IMPORT_C static TInt Create();

    50 		virtual ~CFilterJpegSource();

    51 	

    52 	private:

    53 		static CFilterJpegSource* NewL();

    54 		CFilterJpegSource();

    55 		void ConstructL();

    56 	

    57 	public: // MImageFilter

    58 		virtual TRect Rect();

    59         virtual TReal Scale();

    60         virtual TSize ViewPortSize();

    61 		virtual TBlock * GetBlockL ( const TRect & aRect );

    62 		virtual void SetParent( MImageFilter* aParent );

    63 		virtual void SetChild( MImageFilter* aChild );

    64 		virtual TInt CmdL( const TDesC16& aCmd );

    65 		virtual const char* Type();

    66         

    67         void LoadRectL();

    68 

    69 	private: // Data

    70 

    71         enum TOutputState

    72         {

    73             EDirect,

    74             EBuffer,

    75         } iOutputState;

    76 

    77         /// decoder instance

    78 		MJpegLoad *     iJpeg;

    79         //  file name

    80         TFileName		iFileName;

    81         //  macroblock size

    82         TSize           iBlockSize;

    83         //  image size in macroblocks

    84         TSize           iSizeInBlocks;

    85         //  image rectangle

    86         TRect           iRect;

    87         //  scaled visible image rectangle

    88         TRect           iScaledRect;

    89         //  image size

    90         TSize           iFullSize;

    91 

    92         //  destination size

    93         TSize           iDestSize;

    94         //  destination buffer

    95         TUint32 *       iDestBuffer;

    96         //  relative scale

    97         TReal           iRelScale;

    98 

    99 		TBlockEntry **  iBlockBuffer;

   100 		TInt            iXAnd;

   101 		TInt            iYAnd;

   102 		TUint32         iLastBlock;

   103         TInt *          iIndexMap;

   104         TInt            iOldestBlock;

   105 

   106 	};

   107 

   108 #endif