#include "trop.h"

#include "hsvutil.h"

void OLDRGB2HSV(double r, double g, double b,

				double *h, double *s, double *v)

{

	double max, min;

	double delta;

	max = tmax(r, g, b);

	min = tmin(r, g, b);

	*v = max;

	if (max != 0)

		*s = (max - min) / max;

	else

		*s = 0;

	if (*s == 0)

		*h = 0;

	else {

		delta = max - min;

		if (r == max)

			*h = (g - b) / delta;

		else if (g == max)

			*h = 2 + (b - r) / delta;

		else if (b == max)

			*h = 4 + (r - g) / delta;

		*h = *h * 60;

		if (*h < 0)

			*h += 360;

	}

}

void OLDHSV2RGB(double hue, double sat, double value,

				double *red, double *green, double *blue)

{

	int i;

	double p, q, t, f;

	//  if (hue > 360 || hue < 0)

	//    hue=0;

	if (hue > 360)

		hue -= ((int)hue / 360) * 360;

	//hue-=360;

	if (hue < 0)

		hue += (1 - (int)hue / 360) * 360;

	//hue+=360;

	if (sat < 0)

		sat = 0;

	if (sat > 1)

		sat = 1;

	if (value < 0)

		value = 0;

	if (value > 1)

		value = 1;

	if (sat == 0) {

		*red = value;

		*green = value;

		*blue = value;

	} else {

		if (hue == 360)

			hue = 0;

		hue = hue / 60;

		i = (int)hue;

		f = hue - i;

		p = value * (1 - sat);

		q = value * (1 - (sat * f));

		t = value * (1 - (sat * (1 - f)));

		switch (i) {

		case 0:

			*red = value;

			*green = t;

			*blue = p;

			break;

		case 1:

			*red = q;

			*green = value;

			*blue = p;

			break;

		case 2:

			*red = p;

			*green = value;

			*blue = t;

			break;

		case 3:

			*red = p;

			*green = q;

			*blue = value;

			break;

		case 4:

			*red = t;

			*green = p;

			*blue = value;

			break;

		case 5:

			*red = value;

			*green = p;

			*blue = q;

			break;

		}

	}

}