man hsv_to_rgb () - Converts color values between the HSV and RGB colorspaces. Allegro game programming library.
NAME
hsv_to_rgb, rgb_to_hsv - Converts color values between the HSV and RGB colorspaces. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
void hsv_to_rgb(float h, float s, float v, int *r, int *g, int *b);
void rgb_to_hsv(int r, int g, int b, float *h, float *s, float *v);
DESCRIPTION
Convert color values between the HSV and RGB colorspaces. The RGB values range from 0 to 255, hue is from 0 to 360, and saturation and value are from 0 to 1. Example:
int r, g, b; float hue, saturation, value; ... /* Convert a reddish color to HSV format. */ rgb_to_hsv(255, 0, 128, &hue, &saturation, &value); /* Now put our tin foil hat, and verify that. */ hsv_to_rgb(hue, saturation, value, &r, &g, &b); ASSERT(r == 255); ASSERT(g == 0); ASSERT(b == 128);