Returns the id of the current graphics driver. allegro game programming library.
#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.
set_gfx_mode(3alleg4), is_windowed_mode(3alleg4)