// ========================================================
// Module:		 CAutohist.h/cpp
//
// Description: Auto histogram equalization 
//
// Author(s):	 Chi Toung Yeung						cty
//
// Input:		Windows' bitmap 8 bpp Gray or 24 bpp RGB only
// Output:		
//
// History:
// 23Mar06		start									cty
// 24Mar06	Construction methods						cty
// 24Mar06	Load(), GetStat()							cty
// 26Mar06	class needs testing							cty
// 31mar06	AdjMinMax() work but pixel orders are backward
//			problem is in bmp<->raw conversion			cty
// 13Apr06	BuiltList() for X axis data that has some
//			dynamic range clippings						cty
// ========================================================

// --------------------------------------------------------
// Constants
// --------------------------------------------------------
#define	QUAD											4
#define RGB												3
enum { CHAN_BLU, CHAN_GRN, CHAN_RED, CHAN_GRAY };

// --------------------------------------------------------
// Errors
// --------------------------------------------------------
#define INVALID_INPUT									-14000
#define MISSING_IMAGE									-14001

// --------------------------------------------------------
// Class Definition
// --------------------------------------------------------

class CAutoHist : public Chist
{

public:
	CAutoHist();
	~CAutoHist();

	void Empty();
	bool IsEmpty();

public:
	int Load ( CRaw *raw1 );
	int GetStat (int &iMin, int &iShdw, int &iMid, int &iHgh, int &iMax, int iChannel );

public:
	int Equalize ( int iChannel );
	int AdjMinMax ( int iChannel );
	int AdjMinMax ( int iMin, int iMax, int iChannel );
	int Manual ( int iMin, int iQtr, int iMid, int iThrQtr, int iMax, int iChannel );

private:
	int BuiltList ( double X[], double Y[], int &cnt );
public:
	int m_iMin[QUAD];
	int m_iMax[QUAD];
	int m_iQtr[QUAD];
	int m_iMid[QUAD];
	int m_iThrQtr[QUAD];
	int m_iChan;

public:
	CRaw *m_raw1;
};