Allegro 5 api
#include <allegro5/allegro.h> typedef struct ALLEGRO_MONITOR_INFO
Describes a monitors size and position relative to other monitors. x1, y1 will be 0, 0 on the primary display. Other monitors can have negative values if they are to the left or above the primary display.
typedef struct ALLEGRO_MONITOR_INFO
{
int x1;
int y1;
int x2;
int y2;
} ALLEGRO_MONITOR_INFO;
al_get_monitor_info(3alleg5)