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/* test-xinerama.c --- playing with XF86VidModeGetViewPort
* xscreensaver, Copyright (c) 2004 Jamie Zawinski <jwz@jwz.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdio.h>
#include <time.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#include <X11/Intrinsic.h>
#include <X11/Xproto.h>
#include <X11/extensions/xf86vmode.h>
#include <X11/extensions/Xinerama.h>
char *progname = 0;
char *progclass = "XScreenSaver";
static const char *
blurb (void)
{
static char buf[255];
time_t now = time ((time_t *) 0);
char *ct = (char *) ctime (&now);
int n = strlen(progname);
if (n > 100) n = 99;
strncpy(buf, progname, n);
buf[n++] = ':';
buf[n++] = ' ';
strncpy(buf+n, ct+11, 8);
strcpy(buf+n+9, ": ");
return buf;
}
static Bool error_handler_hit_p = False;
static int
ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
{
error_handler_hit_p = True;
return 0;
}
static int
screen_count (Display *dpy)
{
int n = ScreenCount(dpy);
int xn = 0;
int event_number, error_number;
if (!XineramaQueryExtension (dpy, &event_number, &error_number))
{
fprintf(stderr, "%s: XineramaQueryExtension(dpy, ...) ==> False\n",
blurb());
goto DONE;
}
else
fprintf(stderr, "%s: XineramaQueryExtension(dpy, ...) ==> %d, %d\n",
blurb(), event_number, error_number);
if (!XineramaIsActive(dpy))
{
fprintf(stderr, "%s: XineramaIsActive(dpy) ==> False\n",
blurb());
goto DONE;
}
else
{
int major, minor;
XineramaScreenInfo *xsi;
fprintf(stderr, "%s: XineramaIsActive(dpy) ==> True\n",
blurb());
if (!XineramaQueryVersion(dpy, &major, &minor))
{
fprintf(stderr,
"%s: XineramaQueryVersion(dpy, ...) ==> False\n",
blurb());
goto DONE;
}
else
fprintf(stderr,
"%s: XineramaQueryVersion(dpy, ...) ==> %d, %d\n",
blurb(), major, minor);
xsi = XineramaQueryScreens (dpy, &xn);
if (xsi) XFree (xsi);
}
DONE:
fprintf (stderr, "\n");
fprintf (stderr, "%s: X client screens: %d\n", blurb(), n);
fprintf (stderr, "%s: Xinerama screens: %d\n", blurb(), xn);
fprintf (stderr, "\n");
if (xn > n) return xn;
else return n;
}
int
main (int argc, char **argv)
{
int event_number, error_number;
int major, minor;
int nscreens = 0;
int i;
XtAppContext app;
Widget toplevel_shell = XtAppInitialize (&app, progclass, 0, 0,
&argc, argv, 0, 0, 0);
Display *dpy = XtDisplay (toplevel_shell);
XtGetApplicationNameAndClass (dpy, &progname, &progclass);
if (!XF86VidModeQueryExtension(dpy, &event_number, &error_number))
{
fprintf(stderr, "%s: XF86VidModeQueryExtension(dpy, ...) ==> False\n",
blurb());
fprintf(stderr,
"%s: server does not support the XF86VidMode extension.\n",
blurb());
exit(1);
}
else
fprintf(stderr, "%s: XF86VidModeQueryExtension(dpy, ...) ==> %d, %d\n",
blurb(), event_number, error_number);
if (!XF86VidModeQueryVersion(dpy, &major, &minor))
{
fprintf(stderr, "%s: XF86VidModeQueryVersion(dpy, ...) ==> False\n",
blurb());
fprintf(stderr,
"%s: server didn't report XF86VidMode version numbers?\n",
blurb());
}
else
fprintf(stderr, "%s: XF86VidModeQueryVersion(dpy, ...) ==> %d, %d\n",
blurb(), major, minor);
nscreens = screen_count (dpy);
for (i = 0; i < nscreens; i++)
{
int result = 0;
int x = 0, y = 0, dot = 0;
XF86VidModeModeLine ml = { 0, };
XErrorHandler old_handler;
XSync (dpy, False);
error_handler_hit_p = False;
old_handler = XSetErrorHandler (ignore_all_errors_ehandler);
result = XF86VidModeGetViewPort (dpy, i, &x, &y);
XSync (dpy, False);
XSetErrorHandler (old_handler);
XSync (dpy, False);
if (error_handler_hit_p)
{
fprintf(stderr,
"%s: XF86VidModeGetViewPort(dpy, %d, ...) ==> X error\n",
blurb(), i);
continue;
}
if (! result)
fprintf(stderr, "%s: XF86VidModeGetViewPort(dpy, %d, ...) ==> %d\n",
blurb(), i, result);
result = XF86VidModeGetModeLine (dpy, i, &dot, &ml);
if (! result)
fprintf(stderr, "%s: XF86VidModeGetModeLine(dpy, %d, ...) ==> %d\n",
blurb(), i, result);
fprintf (stderr, "%s: screen %d: %dx%d; viewport: %dx%d+%d+%d\n",
blurb(), i,
DisplayWidth (dpy, i), DisplayHeight (dpy, i),
ml.hdisplay, ml.vdisplay, x, y
);
fprintf (stderr,
"%s: hsync start %d; end %d; total %d; skew %d;\n",
blurb(),
ml.hsyncstart, ml.hsyncend, ml.htotal, ml.hskew);
fprintf (stderr,
"%s: vsync start %d; end %d; total %d; flags 0x%04x;\n",
blurb(),
ml.vsyncstart, ml.vsyncend, ml.vtotal, ml.flags);
fprintf (stderr, "\n");
}
XSync (dpy, False);
exit (0);
}
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