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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/Xlib.h>
#include <X11/extensions/xf86vmode.h>
int main(void)
{
Display *dpy;
XF86VidModeModeLine current;
XF86VidModeModeInfo **modes;
int num_modes, i;
int saved_mode = -1;
int dotclock;
dpy = XOpenDisplay(NULL);
if (dpy == NULL)
dpy = XOpenDisplay(":0");
XF86VidModeGetModeLine(dpy, DefaultScreen(dpy), &dotclock, ¤t);
XF86VidModeGetAllModeLines(dpy, XDefaultScreen(dpy),
&num_modes, &modes);
for (i = 0; i < num_modes; i++) {
int this;
this = (current.hdisplay == modes[i]->hdisplay &&
current.vdisplay == modes[i]->vdisplay &&
dotclock == modes[i]->dotclock);
if (this && saved_mode == -1)
saved_mode = i;
printf("[%d] %dx%d%s\n",
i,
modes[i]->hdisplay,
modes[i]->vdisplay,
this ? "*" : "");
}
for (i = 0; i < num_modes; i++) {
printf("Switching to mode %dx%d\n",
modes[i]->hdisplay,
modes[i]->vdisplay);
XF86VidModeSwitchToMode(dpy, XDefaultScreen(dpy), modes[i]);
XSync(dpy, True);
}
if (saved_mode != -1) {
XF86VidModeSwitchToMode(dpy, XDefaultScreen(dpy),
modes[saved_mode]);
XFlush(dpy);
}
return 0;
}
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