XGetScreenSaver

XSetScreenSaver(3X11)		XLIB FUNCTIONS		XSetScreenSaver(3X11)



NAME
       XSetScreenSaver, XForceScreenSaver, XActivateScreenSaver, XRe-
       setScreenSaver, XGetScreenSaver - manipulate the screen saver

SYNTAX
       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-
	      sures_return);

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

       allow_exposures_return
		 Returns the current screen save control value (DontAllowEx-
		 posures, AllowExposures, or DefaultExposures).

       display	 Specifies the connection to the X server.

       interval	 Specifies the interval, in seconds, between screen saver
		 alterations.

       interval_return
		 Returns the interval between screen saver invocations.

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

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

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

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

       timeout_return
		 Returns the timeout, in seconds, until the screen saver
		 turns on.

DESCRIPTION
       Timeout and interval are specified in seconds.  A timeout of 0 dis-
       ables the screen saver (but an activated screen saver is not deacti-
       vated), and a timeout of -1 restores the default.  Other negative val-
       ues generate a BadValue error.  If the timeout value is nonzero,
       XSetScreenSaver enables the screen saver.  An interval of 0 disables
       the random-pattern motion.  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 activated.

       For each screen, if blanking is preferred and the hardware supports
       video blanking, the screen simply goes blank.  Otherwise, if either
       exposures 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.  Other-
       wise, the screens’ state do not change, and the screen saver is not
       activated.  The screen saver is deactivated, and all screen states are
       restored 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.  Examples of ways to change the screen include scrambling the
       colormap periodically, moving an icon image around the screen periodi-
       cally, or tiling the screen with the root window background tile, ran-
       domly 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.

DIAGNOSTICS
       BadValue	 Some numeric value falls outside the range of values
		 accepted by the request.  Unless a specific range is speci-
		 fied for an argument, the full range defined by the argu-
		 ment’s type is accepted.  Any argument defined as a set of
		 alternatives can generate this error.

SEE ALSO
       Xlib - C Language X Interface



							XSetScreenSaver(3X11)