DOKK / manpages / debian 10 / allegro5-doc / al_get_pixel_size.3alleg5.en
al_get_pixel_size(3alleg5) al_get_pixel_size(3alleg5)

al_get_pixel_size - Allegro 5 API

#include <allegro5/allegro.h>
int al_get_pixel_size(int format)
    

Return the number of bytes that a pixel of the given format occupies. For blocked pixel formats (e.g. compressed formats), this returns 0.

ALLEGRO_PIXEL_FORMAT(3alleg5), al_get_pixel_format_bits(3alleg5)

Allegro reference manual