man get_gfx_mode (3): Returns the id of the current graphics driver. Allegro game programming library.

get_gfx_mode(3) Returns the id of the current graphics driver. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

int get_gfx_mode();

This function will let you determine which graphics driver is currently set by allegro. If no graphics driver is set, it will return GFX_NONE.

Returns the id of the current graphics driver if there is one, or GFX_NONE if none is set.