/*

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

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "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:   

*	CDCDCDigitalZoom 

*		Scaling of image to display size & zooming.

*		Includes support for different scaling and crop sizes with pan&scan.

*		Pan can use previously computed scaled data when changing.

*		Based on IMAAMI scaling algorithm.

*

*/

#ifndef __DIGITAL_ZOOM_H

#define __DIGITAL_ZOOM_H

#include <e32std.h> // for Fundamental Types

#include <e32base.h> // for Fundamental Types

#include <eikenv.h>

#include "DCDefines.h"

//Const tables for computation speed-up

const TUint16 KDivTable[4 * 256] =

{

				  32768, 21845, 16384, 13107, 10923,  9362,  8192,  7282,

     6554,  5958,  5461,  5041,  4681,  4369,  4096,  3855,  3641,  3449,

     3277,  3121,  2979,  2849,  2731,  2621,  2521,  2427,  2341,  2260,

     2185,  2114,  2048,  1986,  1928,  1872,  1820,  1771,  1725,  1680,

     1638,  1598,  1560,  1524,  1489,  1456,  1425,  1394,  1365,  1337,

     1311,  1285,  1260,  1237,  1214,  1192,  1170,  1150,  1130,  1111,

     1092,  1074,  1057,  1040,  1024,  1008,   993,   978,   964,   950,

      936,   923,   910,   898,   886,   874,   862,   851,   840,   830,

      819,   809,   799,   790,   780,   771,   762,   753,   745,   736,

      728,   720,   712,   705,   697,   690,   683,   676,   669,   662,

      655,   649,   643,   636,   630,   624,   618,   612,   607,   601,

      596,   590,   585,   580,   575,   570,   565,   560,   555,   551,

      546,   542,   537,   533,   529,   524,   520,   516,   512,   508,

      504,   500,   496,   493,   489,   485,   482,   478,   475,   471,

      468,   465,   462,   458,   455,   452,   449,   446,   443,   440,

      437,   434,   431,   428,   426,   423,   420,   417,   415,   412,

      410,   407,   405,   402,   400,   397,   395,   392,   390,   388,

      386,   383,   381,   379,   377,   374,   372,   370,   368,   366,

      364,   362,   360,   358,   356,   354,   352,   350,   349,   347,

      345,   343,   341,   340,   338,   336,   334,   333,   331,   329,

      328,   326,   324,   323,   321,   320,   318,   317,   315,   314,

      312,   311,   309,   308,   306,   305,   303,   302,   301,   299,

      298,   297,   295,   294,   293,   291,   290,   289,   287,   286,

      285,   284,   282,   281,   280,   279,   278,   277,   275,   274,

      273,   272,   271,   270,   269,   267,   266,   265,   264,   263,

      262,   261,   260,   259,   258,   257,   256,   255,   254,   253,

      252,   251,   250,   249,   248,   247,   246,   245,   245,   244,

      243,   242,   241,   240,   239,   238,   237,   237,   236,   235,

      234,   233,   232,   232,   231,   230,   229,   228,   228,   227,

      226,   225,   224,   224,   223,   222,   221,   221,   220,   219,

      218,   218,   217,   216,   216,   215,   214,   213,   213,   212,

      211,   211,   210,   209,   209,   208,   207,   207,   206,   205,

      205,   204,   204,   203,   202,   202,   201,   200,   200,   199,

      199,   198,   197,   197,   196,   196,   195,   194,   194,   193,

      193,   192,   192,   191,   191,   190,   189,   189,   188,   188,

      187,   187,   186,   186,   185,   185,   184,   184,   183,   183,

      182,   182,   181,   181,   180,   180,   179,   179,   178,   178,

      177,   177,   176,   176,   175,   175,   174,   174,   173,   173,

      172,   172,   172,   171,   171,   170,   170,   169,   169,   168,

      168,   168,   167,   167,   166,   166,   165,   165,   165,   164,

      164,   163,   163,   163,   162,   162,   161,   161,   161,   160,

      160,   159,   159,   159,   158,   158,   158,   157,   157,   156,

      156,   156,   155,   155,   155,   154,   154,   153,   153,   153,

      152,   152,   152,   151,   151,   151,   150,   150,   150,   149,

      149,   149,   148,   148,   148,   147,   147,   147,   146,   146,

      146,   145,   145,   145,   144,   144,   144,   143,   143,   143,

      142,   142,   142,   142,   141,   141,   141,   140,   140,   140,

      139,   139,   139,   139,   138,   138,   138,   137,   137,   137,

      137,   136,   136,   136,   135,   135,   135,   135,   134,   134,

      134,   133,   133,   133,   133,   132,   132,   132,   132,   131,

      131,   131,   131,   130,   130,   130,   130,   129,   129,   129,

      129,   128,   128,   128,   128,   127,   127,   127,   127,   126,

      126,   126,   126,   125,   125,   125,   125,   124,   124,   124,

      124,   123,   123,   123,   123,   122,   122,   122,   122,   122,

      121,   121,   121,   121,   120,   120,   120,   120,   120,   119,

      119,   119,   119,   119,   118,   118,   118,   118,   117,   117,

      117,   117,   117,   116,   116,   116,   116,   116,   115,   115,

      115,   115,   115,   114,   114,   114,   114,   114,   113,   113,

      113,   113,   113,   112,   112,   112,   112,   112,   111,   111,

      111,   111,   111,   111,   110,   110,   110,   110,   110,   109,

      109,   109,   109,   109,   109,   108,   108,   108,   108,   108,

      107,   107,   107,   107,   107,   107,   106,   106,   106,   106,

      106,   106,   105,   105,   105,   105,   105,   105,   104,   104,

      104,   104,   104,   104,   103,   103,   103,   103,   103,   103,

      102,   102,   102,   102,   102,   102,   101,   101,   101,   101,

      101,   101,   101,   100,   100,   100,   100,   100,   100,    99,

       99,    99,    99,    99,    99,    99,    98,    98,    98,    98,

       98,    98,    98,    97,    97,    97,    97,    97,    97,    97,

       96,    96,    96,    96,    96,    96,    96,    95,    95,    95,

       95,    95,    95,    95,    94,    94,    94,    94,    94,    94,

       94,    93,    93,    93,    93,    93,    93,    93,    93,    92,

       92,    92,    92,    92,    92,    92,    92,    91,    91,    91,

       91,    91,    91,    91,    91,    90,    90,    90,    90,    90,

       90,    90,    90,    89,    89,    89,    89,    89,    89,    89,

       89,    88,    88,    88,    88,    88,    88,    88,    88,    87,

       87,    87,    87,    87,    87,    87,    87,    87,    86,    86,

       86,    86,    86,    86,    86,    86,    86,    85,    85,    85,

       85,    85,    85,    85,    85,    85,    84,    84,    84,    84,

       84,    84,    84,    84,    84,    83,    83,    83,    83,    83,

       83,    83,    83,    83,    83,    82,    82,    82,    82,    82,

       82,    82,    82,    82,    82,    81,    81,    81,    81,    81,

       81,    81,    81,    81,    81,    80,    80,    80,    80,    80,

       80,    80,    80,    80,    80,    79,    79,    79,    79,    79,

       79,    79,    79,    79,    79,    78,    78,    78,    78,    78,

       78,    78,    78,    78,    78,    78,    77,    77,    77,    77,

       77,    77,    77,    77,    77,    77,    77,    76,    76,    76,

       76,    76,    76,    76,    76,    76,    76,    76,    76,    75,

       75,    75,    75,    75,    75,    75,    75,    75,    75,    75,

       74,    74,    74,    74,    74,    74,    74,    74,    74,    74,

       74,    74,    73,    73,    73,    73,    73,    73,    73,    73,

       73,    73,    73,    73,    72,    72,    72,    72,    72,    72,

       72,    72,    72,    72,    72,    72,    72,    71,    71,    71,

       71,    71,    71,    71,    71,    71,    71,    71,    71,    71,

       70,    70,    70,    70,    70,    70,    70,    70,    70,    70,

       70,    70,    70,    69,    69,    69,    69,    69,    69,    69,

       69,    69,    69,    69,    69,    69,    69,    68,    68,    68,

       68,    68,    68,    68,    68,    68,    68,    68,    68,    68,

       68,    67,    67,    67,    67,    67,    67,    67,    67,    67,

       67,    67,    67,    67,    67,    67,    66,    66,    66,    66,

       66,    66,    66,    66,    66,    66,    66,    66,    66,    66,

       66,    65,    65,    65,    65,    65,    65,    65,    65,    65,

       65,    65,    65,    65,    65,    65,    65,    64,    64,    64,

       64,    64,    64,    64,    64,    64

};

// Class definition

class CDCDigitalZoom : public CBase

{

public:

	// Struct definition

	struct DCDigitalZoomParams

	{

		TInt sizeX;		//Output size

		TInt sizeY;

		TReal scaleX;	//Scaling factors

		TReal scaleY;

		TInt allShiftX;	//Pan location

		TInt allShiftY;

		TInt newShiftX;	//Change in pan (used for speed-up)

		TInt newShiftY;	//only one value at time can be >0

	};

	//Standard class functions

	CDCDigitalZoom();

	void ConstructL();	

	static CDCDigitalZoom* NewL();

	static CDCDigitalZoom* NewLC();

	~CDCDigitalZoom();

	// Process original image and store output image (main function)

	void ProcessL(const CFbsBitmap* aOriPtr, CFbsBitmap* aOutPtr);

	//Set processing parameters

	void SetParameters(DCDigitalZoomParams* params);

	//Get current processing parameters

	void GetParameters(DCDigitalZoomParams* params);

protected:

	//Parameters

	DCDigitalZoomParams iParams;

private:

	//Do actual resizing	

	void DecimateL(const CFbsBitmap* aOriPtr, CFbsBitmap* aOutPtr,

						   TInt aOutSizeX, TInt aOutSizeY,

						   TInt aOriSizeX, TInt aOriSizeY,

						   TReal aZoomX, TReal aZoomY,

						   TInt allShiftX, TInt allShiftY,

						   TInt newShiftX, TInt newShiftY);

};

#endif // ifndef __DIGITAL_ZOOM_H

//----IMAAMI----