NAME

       droste - screen saver.

SYNOPSIS

       droste  [--display  host:display.screen]  [--visual  visual]  [--window] [--root] [--delay
       number] [--duration seconds] [--speed ratio] [--r1 ratio] [--r2 ratio] [--fps]

DESCRIPTION

       Mise en abyme: infinite spiral recursion within images.

       Works best with images that have a central circular feature.

OPTIONS

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

       --root  Draw on the root window.

       --delay number
               Per-frame delay, in microseconds.  Default: 20000 (0.02 seconds).

       --duration number
               How long until loading a new image, in seconds.  Default: 2 minutes.

       --speed number
               Speed of zooming into the image.  2.0 means twice as fast, 0.5 means half as fast.
               Negative to zoom out.

       --r1 number
               Inner radius of the spiral.  Default: 0.2.

       --r2 number
               Outer radius of the spiral.  Default: 0.7.

       --fps | --no--fps
               Whether to show a frames-per-second display at the bottom of the screen.

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)

COPYRIGHT

       Copyright © 2023 by 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.

AUTHOR

       Jamie Zawinski.