Provided by: allegro5-doc_5.0.10-2_all 

NAME
al_get_num_display_modes - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
int al_get_num_display_modes(void)
DESCRIPTION
Get the number of available fullscreen display modes for the current set of display parameters. This
will use the values set with al_set_new_display_refresh_rate(3alleg5), and
al_set_new_display_flags(3alleg5) to find the number of modes that match. Settings the new display
parameters to zero will give a list of all modes for the default driver.
SEE ALSO
al_get_display_mode(3alleg5)
Allegro reference manual al_get_num_display_modes(3alleg5)()