---

contrast.cpp

//---------------------------------------------------------------------------


#pragma hdrstop

#include "contrast.h"

//---------------------------------------------------------------------------

unsigned char __fastcall TContrast::getVal(__int16 val)
{
        // ratio = 0xff/size
        if (val <= _lowerAbs)
                return 0;
        else if (val >= _upperAbs)
                return 0xff;
        else
                return (unsigned char)((val-_lowerAbs)*_ratio/_dist);
}

void __fastcall TContrast::setLower(float val)
{
        _lower = val;
        _dist = _upper - _lower;
        _lowerAbs = (int)(val*(float)_size);
}

void __fastcall TContrast::setUpper(float val)
{
        _upper = val;
        _dist = _upper - _lower;
        _upperAbs = (int)(val*(float)_size);
}

#pragma package(smart_init)

---