al_get_new_display_adapter(3) al_get_new_display_adapter(3)

al_get_new_display_adapter - Allegro 5 API

#include <allegro5/allegro.h>
int al_get_new_display_adapter(void)

Gets the video adapter index where new displays will be created by the calling thread, if previously set with al_set_new_display_adapter(3). Otherwise returns ALLEGRO_DEFAULT_DISPLAY_ADAPTER.

al_set_new_display_adapter(3)

Allegro reference manual