hsv_to_rgb(3)

✨ hsv_to_rgb(3) ✨

okay bestie, so this one lives in the Allegro manual — the Allegro game programming library — and it's literally just two lil functions that translate colors back and forth between two whole color languages. 💖

🎀 NAME 🎀

hsv_to_rgb, rgb_to_hsv — converts color values between the HSV and RGB color spaces. it's giving 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 🌸

so basically these two convert color values between the HSV and RGB color spaces, no cap. 🔥

here's the vibe check on the ranges, and you literally cannot forget these:

• RGB values go from 0 to 255
• hue goes from 0 to 360
• saturation and value go from 0 to 1

and here's the example, i'm not editing a single character of it, periodt:

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);

not the tin foil hat 😭 but fr fr that's the whole thing — round trip a color, then assert it came back identical. slay. 👑

🫶 SEE ALSO 🫶

• exlights(3)
• exrgbhsv(3)

ngl the tin foil hat line is iconic and i refuse to paraphrase it 💀

and that's the whole page bestie, mwah 💋 — brought to you by Allegro, version 4.4.3. go forth and convert some colors, you main character. 🌈⭐💜