beforelight(1) [redhat man page]

beforelight(1)						      General Commands Manual						    beforelight(1)

NAME

       beforelight - screen saver

SYNOPSIS

       beforelight [ -toolkitoption ... ]

DESCRIPTION

       The beforelight program is a sample implementation of a screen saver for X servers supporting the MIT-SCREEN-SAVER extension.

AUTHORS

       Keith Packard, MIT X Consortium.

X Version 11							    Release 6.6 						    beforelight(1)

XSetScreenSaver()														 XSetScreenSaver()

Name
  XSetScreenSaver - set the parameters of the screen saver.

Synopsis
  XSetScreenSaver(display, timeout, interval, prefer_blanking,
	    allow_exposures)
	Display *display;
	int timeout, interval;
	int prefer_blanking;
	int allow_exposures;

Arguments
  display   Specifies a connection to an X server; returned from XOpenDisplay().

  timeout   Specifies the time of inactivity, in seconds, before the screen saver turns on.

  interval  Specifies  the  interval,  in  seconds,  between  screen saver invocations.  This is for intermittent changes to the display, not
	    blanking.

  prefer_blanking
	    Specifies whether to enable screen blanking.  Possible values are DontPreferBlanking, PreferBlanking, or DefaultBlanking.

  allow_exposures
	    Specifies the current screen saver control values.	Possible values are DontAllowExposures, AllowExposures, or DefaultExposures.

Description
  XSetScreenSaver() sets the parameters that control the screen saver.	timeout and interval are specified in seconds.	 A  positive  timeout
  enables  the	screen	saver.	 A timeout of zero (0) disables the screen saver, while a timeout of -1 restores the default.  An interval of
  zero (0) disables the random pattern motion.	If no input from devices (keyboard, mouse, etc.) is generated for  the	specified  number  of
  timeout seconds, the screen saver is activated.

  For  each screen, if blanking is preferred and the hardware supports video blanking, the screen will simply go blank.  Otherwise, if either
  exposures are allowed or the screen can be regenerated without sending exposure events to clients, the screen is tiled with the root window
  background  tile,  with a random origin, each interval seconds.  Otherwise, the state of the screen does not change.	All screen states are
  restored at the next input from a device.

  If the server-dependent screen saver method supports periodic change, interval serves as a hint about how long the change period should be,
  and  a  value of zero (0) hints that no periodic change should be made.  Examples of ways to change the screen include scrambling the color
  map periodically, moving an icon image about the screen periodically, or tiling the screen with the root window background  tile,  randomly
  reoriginated periodically.

  For more information on the screen saver, see Volume One, Chapter 15, Other Programming Techniques.

Errors
  BadValue  timeout < -1.

See Also
  XActivateScreenSaver(), XForceScreenSaver(), XGetScreenSaver(), XResetScreenSaver().

Xlib - Screen Saver														 XSetScreenSaver()