#include <X11/extensions/Xinerama.h>
#include <X11/X.h>
#include <X11/Xlib.h>

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv)
{
	Display *dpy;

	if ((dpy = XOpenDisplay(NULL)) == NULL) {
		fprintf(stderr, "%s: can't open %s\n", argv[0], XDisplayName(NULL));
		exit(1);
	}

	if (XineramaIsActive(dpy)) {
		XineramaScreenInfo *screens;
		int nscreens, i;
		screens = XineramaQueryScreens(dpy, &nscreens);
		printf("Xinerama is enabled on %s (%d screen(s) available)\n", XDisplayName(NULL), nscreens);
		for (i = 0; i < nscreens; i++) {
			printf("Xinerama screen %d: %dx%d+%d+%d\n", 
			screens[i].screen_number,
			screens[i].width,
			screens[i].height,
			screens[i].x_org,
			screens[i].y_org);
		}
	} else {
		printf("Xinerama is not enabled on %s\n", XDisplayName(NULL));
	}

	XCloseDisplay(dpy);
}