DOKK / manpages / debian 12 / allegro5-doc / al_get_display_mode.3alleg5.en
al_get_display_mode(3alleg5) al_get_display_mode(3alleg5)

al_get_display_mode - Allegro 5 API

#include <allegro5/allegro.h>
ALLEGRO_DISPLAY_MODE *al_get_display_mode(int index, ALLEGRO_DISPLAY_MODE *mode)
    

Retrieves a fullscreen mode. Display parameters should not be changed between a call of al_get_num_display_modes(3alleg5) and al_get_display_mode(3alleg5). index must be between 0 and the number returned from al_get_num_display_modes-1. mode must be an allocated ALLEGRO_DISPLAY_MODE structure. This function will return NULL on failure, and the mode parameter that was passed in on success.

ALLEGRO_DISPLAY_MODE(3alleg5), al_get_num_display_modes(3alleg5)

Allegro reference manual