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 (DontAllowExpo-
                 sures, 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 disables
       vated.  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 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.

DIAGNOSTICS

       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.

SEE ALSO

       Xlib - C Language X Interface



X Version 11                      Release 6.6            XSetScreenSaver(3X11)