//  FindOverExposure
//    Finds a suitable value of OverExposure for use with SetFlickerCtrl
//    Some calculation is required because this value changes with the brightness
//    set with SetColourParameters
//
//  Parameters: Brightness  -  last brightness value set with SetColourParameters
//
//  Returns: OverExposure value to use with SetFlickerCtrl
//


#define FLICKER_MAX_EXPOSURE                    250
#define FLICKER_ALLOWABLE_OVER_EXPOSURE         146
#define FLICKER_BRIGHTNESS_CONSTANT             59


BYTE FindOverExposure( BYTE Brightness )
{
        BYTE    MaxAllowableOverExposure,
                OverExposure;

        MaxAllowableOverExposure = FLICKER_MAX_EXPOSURE - Brightness - FLICKER_BRIGHTNESS_CONSTANT;

        if (  MaxAllowableOverExposure < FLICKER_ALLOWABLE_OVER_EXPOSURE)
        {
                OverExposure = MaxAllowableOverExposure;
        }
        else
        {
                OverExposure = FLICKER_ALLOWABLE_OVER_EXPOSURE;
        }

        return OverExposure;
}