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XSetScreenSaver(3)		XLIB FUNCTIONS		    XSetScreenSaver(3)

       XSetScreenSaver,	XForceScreenSaver, XActivateScreenSaver, XResetScreen-
       Saver, XGetScreenSaver -	manipulate the screen saver

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

       int XForceScreenSaver(Display *display, int mode);

       int XActivateScreenSaver(Display	*display);

       int XResetScreenSaver(Display *display);

       int XGetScreenSaver(Display *display, int *timeout_return, int *inter-
	      val_return, int *prefer_blanking_return, int *allow_expo-

		 Specifies the screen save control values.  You	can pass Don-
		 tAllowExposures, AllowExposures, or DefaultExposures.

		 Returns the current screen save control value (DontAllowExpo-
		 sures,	AllowExposures,	or DefaultExposures).

       display	 Specifies the connection to the X server.

       interval	 Specifies the interval, in seconds, between screen saver al-

		 Returns the interval between screen saver invocations.

       mode	 Specifies the mode that is to be applied.  You	can pass
		 ScreenSaverActive or ScreenSaverReset.

		 Specifies how to enable screen	blanking.  You can pass	Dont-
		 PreferBlanking, PreferBlanking, or DefaultBlanking.

		 Returns the current screen blanking preference	(Dont-
		 PreferBlanking, PreferBlanking, or DefaultBlanking).

       timeout	 Specifies the timeout,	in seconds, until the screen saver
		 turns on.

		 Returns the timeout, in seconds, until	the screen saver turns

       Timeout and interval are	specified in seconds.  A timeout of 0 disables
       the screen saver	(but an	activated screen saver is not deactivated),
       and a timeout of	-1 restores the	default.  Other	negative values	gener-
       ate a BadValue error.  If the timeout value is nonzero, XSetScreenSaver
       enables the screen saver.  An interval of 0 disables the	random-pattern
       motion.	Both values are	limited	to a 16-bit signed integer range by
       the wire	protocol, despite the C	prototype.  If no input	from devices
       (keyboard, mouse, and so	on) is generated for the specified number of
       timeout seconds once the	screen saver is	enabled, the screen saver is

       For each	screen,	if blanking is preferred and the hardware supports
       video blanking, the screen simply goes blank.  Otherwise, if either ex-
       posures are allowed or the screen can be	regenerated without sending
       Expose events to	clients, the screen is tiled with the root window
       background tile randomly	re-origined each interval seconds.  Otherwise,
       the screens' state do not change, and the screen	saver is not acti-
       vated.  The screen saver	is deactivated,	and all	screen states are re-
       stored at the next keyboard or pointer input or at the next call	to
       XForceScreenSaver with mode ScreenSaverReset.

       If the server-dependent screen saver method supports periodic change,
       the interval argument serves as a hint about how	long the change	period
       should be, and zero hints that no periodic change should	be made.  Ex-
       amples of ways to change	the screen include scrambling the colormap pe-
       riodically, moving an icon image	around the screen periodically,	or
       tiling the screen with the root window background tile, randomly	re-
       origined	periodically.

       XSetScreenSaver can generate a BadValue error.

       If the specified	mode is	ScreenSaverActive and the screen saver cur-
       rently is deactivated, XForceScreenSaver	activates the screen saver
       even if the screen saver	had been disabled with a timeout of zero.  If
       the specified mode is ScreenSaverReset and the screen saver currently
       is enabled, XForceScreenSaver deactivates the screen saver if it	was
       activated, and the activation timer is reset to its initial state (as
       if device input had been	received).

       XForceScreenSaver can generate a	BadValue error.

       The XActivateScreenSaver	function activates the screen saver.

       The XResetScreenSaver function resets the screen	saver.

       The XGetScreenSaver function gets the current screen saver values.

       BadValue	 Some numeric value falls outside the range of values accepted
		 by the	request.  Unless a specific range is specified for an
		 argument, the full range defined by the argument's type is
		 accepted.  Any	argument defined as a set of alternatives can
		 generate this error.

       Xlib - C	Language X Interface

X Version 11			 libX11	1.6.5		    XSetScreenSaver(3)


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