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hsv_to_rgb

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(3), exrgbhsv(3)