al_get_display_adapter(3)                            al_get_display_adapter(3)

NAME
       al_get_display_adapter - Allegro 5 API

SYNOPSIS
              #include <allegro5/allegro.h>

              int al_get_display_adapter(ALLEGRO_DISPLAY *display)

DESCRIPTION
       Returns which adapter the window is currently placed on.  Returns -1 if
       there was an error in determining the adapter.

SINCE
       5.2.10

Allegro reference manual                             al_get_display_adapter(3)