al_get_opengl_texture_size(3alleg5)

💖 al_get_opengl_texture_size 💖

okay bestie, so this one is from the Allegro 5 API — the allegro5 manual, the one and only — and it's literally the lil detective that tells you how big your actual GPU texture is. it's giving "peek behind the curtain" energy ✨

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🌸 SYNOPSIS 🌸

#include <allegro5/allegro_opengl.h>

bool al_get_opengl_texture_size(ALLEGRO_BITMAP *bitmap, int *w, int *h)

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🦋 DESCRIPTION 🦋

so the vibe here is: you hand it a bitmap, and it goes and finds out the size of the texture that's being used for that bitmap. and no, it is not always the same as the bitmap size — that's the whole point, that's the tea 🫖

it can come out different in two situations:

• if OpenGL only supports power-of-two sizes, the texture might be bigger than your bitmap (because OpenGL said "no 64×64 for me, only 128×128 today" 💅)
• if the bitmap is a sub-bitmap, then yeah, the texture it lives in is the big one, not the little slice

it drops the width into *w and the height into *h for you. cute, right?

now for the return value, bestie, pay attention:

• returns true on success ✅
• returns false on failure ❌
• and if the bitmap isn't an OpenGL bitmap at all? then you get zero width and height back. like, 0 and 0. nothing. silence. 💀

heads up: that zero-zero thing is a real outcome, not a bug — so if you see w == 0 and h == 0, your bitmap just isn't an OpenGL bitmap. check that before you go doing math with it, fr fr.

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👀 SEE ALSO 👀

• al_get_opengl_texture_position(3alleg5) — the sister function, for when you need to know where the texture is, not just how big 🌈

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and that's the whole page, periodt 💜 this lil number lives in the <strong>Allegro reference manual</strong> under <code>al_get_opengl_texture_size(3alleg5)</code> — go off, go read the position one next, ily bye 🎀✨