man is_windowed_mode () - Tells if you are running in windowed mode. Allegro game programming library.
NAME
is_windowed_mode - Tells if you are running in windowed mode. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int is_windowed_mode(void);
DESCRIPTION
This function can be used to detect wether 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. */
}
RETURN VALUE
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.