generate_optimized_palette(3)

📦 version 4.4.3.1, in fedora 43, fedora 44

💖 generate_optimized_palette(3) 💖

okay bestie, so this one's from the Allegro manual — the game programming library, you know the vibe ✨ — and it's literally about making a whole custom palette for your bitmap. no cap.

🌸 NAME 🌸

generate_optimized_palette — Generates an optimized palette for a bitmap. Allegro game programming library. 🎀

✨ SYNOPSIS ✨

#include <allegro.h>

int generate_optimized_palette(BITMAP *bmp, PALETTE pal, const char
rsvd[PAL_SIZE]);

like yes, that's the whole signature, rsvd wraps onto the next line, it's fine, she's just long 💅

🦋 DESCRIPTION 🦋

so what this does is generate a 256-color palette that's perfect for making a reduced color version of the truecolor image you pass in. glow-up for your bitmap fr fr 🌈

the rsvd parameter points to a table that tells the optimiser which colors it's actually allowed to touch 👀 and there's a whole little system going on:

  • zero — these are free colors, and the optimiser can set them to literally whatever it likes. do your thing queen 💅
  • negative values — these are reserved colors which cannot be used. nope, off limits, not invited to the party 🚫
  • positive values — these are fixed palette entries that must not be changed, but they can still be used in the optimisation. so like, look but don't touch 👑✨

💀 RETURN VALUE 💀

this function is giving receipts, so here's what it hands back:

  • the number of different colors recognised</b> in the bitmap you provided 🎨
  • zero — if the bitmap is not a truecolor image, or if there wasn't enough memory to do the whole operation 😭
  • negative — if there was any internal error in the color reduction code 💀

🫶 SEE ALSO 🫶

okay that's the whole page bestie, you're so welcome 💜

this has been Allegro, version 4.4.3, and the page is generate_optimized_palette(3) — mwah, slay, periodt 💅✨🎀

📦 where this page comes from