NAME

       distort - distort the content of the screen in interesting ways

SYNOPSIS

       distort  [-root]  [-window]  [-mono]  [-install] [-noinstall] [-visual visual] [-window-id
       window-id] [-delay usecs] [-duration secs] [-radius pixels]  [-speed  int]  [-number  int]
       [-swamp]  [-bounce]  [-reflect] [-vortex] [-magnify] [-blackhole] [-slow] [-shm] [-no-shm]
       [-fps]

DESCRIPTION

       The distort program takes an image and lets circular zones of distortion  wander  randomly
       around  it,  distorting  what  is  under  them.   The  mode  of distortion and the overall
       behaviour of the zones can be influenced in various ways.

       The image that it manipulates will be grabbed from the portion of  the  screen  underlying
       the  window, or from the system's video input, or from a random file on disk, as indicated
       by  the  grabDesktopImages,  grabVideoFrames,  and  chooseRandomImages  options   in   the
       ~/.xscreensaver file; see xscreensaver-demo(1) for more details.

OPTIONS

       distort accepts the following options:

       -root   Draw on the root window.

       -window Draw on a newly-created window. This is the default.

       -mono   If on a color display, pretend we're on a monochrome display.

       -install
               Install a private colormap for the window.

       -noinstall
               Don't install a private colormap for the window.

       -visual visual
               Specify which visual to use. Legal values are the name of a visual class or the id
               number (decimal or hex) of a specific visual.

       -window-id window-id
               Specify which window id to use.

       -delay usecs
               Specify the delay between subsequent animation frames in microseconds.

       -duration seconds
               How long to run before loading a new image.  Default 120 seconds.

       -radius pixels
               Specify the radius of the distortion zone in pixels.

       -speed int
               Specify the speed at which the distortion zone moves,  where  0  is  slow,  higher
               numbers are faster (10 is pretty fast.)

       -number int
               Specify the number of distortion zones.

       -swamp  Instead  of  letting zones wander around, let small zones pop up like bubbles in a
               swamp and leave permanent distortion.  WARNING: this option uses a colossal amount
               of memory: keep the -radius small when using -swamp.

       -bounce Let zones wander around and bounce off the window border. This is the default.

       -reflect
               Mode of distortion that resembles reflection by a cylindrical mirror.

       -vortex Whirlpool-shaped distortion. Way cool.

       -magnify
               This mode of distortion looks like a magnifying glass.

       -blackhole
               Suck your pixels beyond the event horizon. Favourite mode of Dr Stephen Hawking.

       -slow   Make the zone wander slower.

       -shm    Use shared memory extension.

       -no-shm Don't use shared memory extension.

       -fps    Display the current frame rate and CPU load.

ENVIRONMENT

       DISPLAY to get the default host and display number

       XENVIRONMENT
               to  get  the name of a resource file that overrides the global resources stored in
               the RESOURCE_MANAGER property.

SEE ALSO

       X(1), xscreensaver(1), xscreensaver-demo(1), xscreensaver-getimage(1)

COPYRIGHT

       Copyright © 1998 by Jonas Munsin and Jamie Zawinski.  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.

AUTHORS

       Jonas  Munsin  <jmunsin@iki.fi>  and  Jamie  Zawinski  <jwz@jwz.org>.  This manual page by
       Matthias Warkus <mawa@iname.com>, 17-Oct-1999.