DOKK / manpages / debian 12 / allegro4-doc / is_windowed_mode.3alleg4.en
is_windowed_mode(3alleg4) Allegro manual is_windowed_mode(3alleg4)

is_windowed_mode - Tells if you are running in windowed mode. Allegro game programming library.

#include <allegro.h>

int is_windowed_mode(void);

This function can be used to detect whether or not set_gfx_mode() selected a windowed mode. Example:


if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0)
abort_on_error("Couldn't set graphic mode!");
if (is_windowed_mode()) {
/* Windowed mode stuff. */
} else {
/* Fullscreen mode stuff. */
}

Returns true if the current graphics mode is a windowed mode, or zero if it is a fullscreen mode. You should not call this function if you are not in graphics mode.

set_gfx_mode(3alleg4)

version 4.4.3 Allegro