distort(6)                    XScreenSaver manual                   distort(6)

NAME
       distort - distort the content of the screen in interesting ways

SYNOPSIS
       distort  [--root]  [--window-id  number][--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  distor‐
       tion  wander  randomly  around  it, distorting what is under them.  The
       mode of distortion and the overall behaviour of the zones can be influ‐
       enced 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, grabVide‐
       oFrames,  and  chooseRandomImages  options in the ˜/.xscreensaver file;
       see xscreensaver-settings(1) for more details.

OPTIONS
       distort accepts the following options:

       --root  Draw on the root window.

       --window-id number
               Draw on the specified 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 vi‐
               sual class or the id number (decimal or hex) of a specific  vi‐
               sual.

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

       --delay usecs
               Specify  the  delay  between subsequent animation frames in mi‐
               croseconds.

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

       --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.  WARN‐
               ING: 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.

       XSCREENSAVER_WINDOW
               The window ID to use with --root.

SEE ALSO
       X(1),  xscreensaver(1),  xscreensaver-settings(1),  xscreensaver-getim‐
       age(6)

COPYRIGHT
       Copyright  ©  1998  by  Jonas Munsin and Jamie Zawinski.  Permission to
       use, copy, modify, distribute, and sell this software and its  documen‐
       tation for any purpose is hereby granted without fee, provided that the
       above  copyright  notice  appear in all copies and that both that copy‐
       right notice and this permission notice appear in supporting documenta‐
       tion.  No representations are made about the suitability of this  soft‐
       ware  for  any  purpose.  It is provided "as is" without express or im‐
       plied 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.

X Version 11                  6.08 (10‐Oct‐2023)                    distort(6)