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

al_get_pixel - Allegro 5 API

#include <allegro5/allegro.h>
ALLEGRO_COLOR al_get_pixel(ALLEGRO_BITMAP *bitmap, int x, int y)
    

Get a pixel's color value from the specified bitmap. This operation is slow on non-memory bitmaps. Consider locking the bitmap if you are going to use this function multiple times on the same bitmap.

ALLEGRO_COLOR(3alleg5), al_put_pixel(3alleg5), al_lock_bitmap(3alleg5)

Allegro reference manual