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/* test-xdpms.c --- playing with the XDPMS extension.
* xscreensaver, Copyright © 1998-2021 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/dpms.h>
/*#include <X11/extensions/dpmsstr.h>*/
#include "blurb.h"
char *progclass = "XScreenSaver";
static Bool error_handler_hit_p = False;
static int
ignore_all_errors_ehandler (Display *dpy, XErrorEvent *error)
{
error_handler_hit_p = True;
return 0;
}
int
main (int argc, char **argv)
{
int delay = 10;
int event_number, error_number;
int major, minor;
CARD16 standby, suspend, off;
CARD16 state;
BOOL onoff;
XtAppContext app;
Widget toplevel_shell = XtAppInitialize (&app, progclass, 0, 0,
&argc, argv, 0, 0, 0);
Display *dpy = XtDisplay (toplevel_shell);
if (!DPMSQueryExtension(dpy, &event_number, &error_number))
{
fprintf(stderr, "%s: DPMSQueryExtension(dpy, ...) ==> False\n",
blurb());
fprintf(stderr, "%s: server does not support the XDPMS extension\n",
blurb());
exit(1);
}
else
fprintf(stderr, "%s: DPMSQueryExtension(dpy, ...) ==> %d, %d\n", blurb(),
event_number, error_number);
if (!DPMSCapable(dpy))
{
fprintf(stderr, "%s: DPMSCapable(dpy) ==> False\n", blurb());
fprintf(stderr, "%s: server says hardware doesn't support DPMS\n",
blurb());
exit(1);
}
else
fprintf(stderr, "%s: DPMSCapable(dpy) ==> True\n", blurb());
if (!DPMSGetVersion(dpy, &major, &minor))
{
fprintf(stderr, "%s: DPMSGetVersion(dpy, ...) ==> False\n", blurb());
fprintf(stderr, "%s: server didn't report XDPMS version numbers?\n",
blurb());
}
else
fprintf(stderr, "%s: DPMSGetVersion(dpy, ...) ==> %d, %d\n", blurb(),
major, minor);
if (!DPMSGetTimeouts(dpy, &standby, &suspend, &off))
{
fprintf(stderr, "%s: DPMSGetTimeouts(dpy, ...) ==> False\n", blurb());
fprintf(stderr, "%s: server didn't report DPMS timeouts?\n", blurb());
}
else
fprintf(stderr,
"%s: DPMSGetTimeouts(dpy, ...)\n"
"\t ==> standby = %d, suspend = %d, off = %d\n",
blurb(), standby, suspend, off);
while (1)
{
if (!DPMSInfo(dpy, &state, &onoff))
{
fprintf(stderr, "%s: DPMSInfo(dpy, ...) ==> False\n", blurb());
fprintf(stderr, "%s: couldn't read DPMS state?\n", blurb());
onoff = 0;
state = -1;
}
else
{
fprintf(stderr, "%s: DPMSInfo(dpy, ...) ==> %s, %s\n", blurb(),
(state == DPMSModeOn ? "DPMSModeOn" :
state == DPMSModeStandby ? "DPMSModeStandby" :
state == DPMSModeSuspend ? "DPMSModeSuspend" :
state == DPMSModeOff ? "DPMSModeOff" : "???"),
(onoff == 1 ? "On" : onoff == 0 ? "Off" : "???"));
}
if (state == DPMSModeStandby ||
state == DPMSModeSuspend ||
state == DPMSModeOff)
{
int st;
fprintf(stderr, "%s: monitor is off; turning it on\n", blurb());
XSync (dpy, False);
error_handler_hit_p = False;
XSetErrorHandler (ignore_all_errors_ehandler);
XSync (dpy, False);
st = DPMSForceLevel (dpy, DPMSModeOn);
XSync (dpy, False);
if (error_handler_hit_p) st = -666;
fprintf (stderr, "%s: DPMSForceLevel (dpy, DPMSModeOn) ==> %s\n",
blurb(), (st == -666 ? "X Error" : st ? "Ok" : "Error"));
}
sleep (delay);
}
}
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