XScreenSaver(1)XScreenSaver(1)NAMEvidwhacker - grab images and apply random filters to them
SYNOPSISvidwhacker [-display host:display.screen] [-root] [-ver
bose] [-stdin] [-stdout] [-delay seconds] [-directory
directory]
DESCRIPTION
The vidwhacker program grabs an image from disk, or from
the system's video input, then applies random image fil
ters to it, and displays the result. The vidwhacker pro
gram does not terminate until killed.
It depends heavily on the various PBM tools (e.g., ppmre
lief(1).)
Selection of random image files is done by running the
xscreensaver-getimage-file(1) program. Capture of video
frames (if requested) is done by running the xscreensaver-
getimage-video(1) program. The options of whether to do
video, and which directory to search for images, are spec
ified in the ~/.xscreensaver file.
OPTIONSvidwhacker accepts the following options:
-root Draw on the root window. This is the default.
-verbose
Print diagnostics.
-stdin Instead of grabbing an image from disk or video,
read an image to maniupulate from stdin. This
image must be in ppm(5) format. The program will
still perform repeated random image transforma
tions, but it will always use this one image as
its starting point.
-delay seconds
How long to sleep between images. Default 5 sec
onds (the actual elapsed time is significantly
longer, due to processing time.)
-stdout Instead of displaying the image on a window or on
the root, write the new image on stdout, and exit.
-directory directory
Use this directory instead of the imageDirectory
specified in the ~/.xscreensaver file.
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_MAN
AGER property.
BUGS
It's slow.
TO DO
It might be interesting to rewrite this to use gimp(1)
plugins instead of the pbm tools. It probably wouldn't be
any faster, but there would be a wider variety of effects
available.
SEE ALSOX(1), xscreensaver(1), xscreensaver-getimage-file(1),
xscreensaver-getimage-video(1), xv(1), ppmtogif(1),
cjpeg(1)COPYRIGHT
Copyright 1998-2001 by Jamie Zawinski. Permission to
use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted with
out 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 <jwz@jwz.org>, 18-Jan-98.
X Version 11 17-Jun-99 XScreenSaver(1)
