NAME¶

hsv_to_rgb, rgb_to_hsv - Converts color values between the HSV and RGB color spaces. 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 color spaces. 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);

SEE ALSO¶

exlights(3alleg4), exrgbhsv(3alleg4)