View Source: vidwhacker(1) - Waikato Linux Users Group

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XScreenSaver
!!!XScreenSaver
NAME
SYNOPSIS
DESCRIPTION
OPTIONS
ENVIRONMENT
BUGS
TO DO
SEE ALSO
COPYRIGHT
AUTHOR
----
!!NAME


vidwhacker - grab images and apply random filters to them
!!SYNOPSIS


__vidwhacker__ [[-display ''host:display.screen'']
[[-root] [[-verbose] [[-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
filters to it, and displays the result. The
''vidwhacker'' program does not terminate until
killed.


It depends heavily on the various PBM tools (e.g.,
ppmrelief(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 specified in the ''~/.xscreensaver''
file.
!!OPTIONS


''vidwhacker'' 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 transformations, but it will always
use this one image as its starting point.


__-delay__ ''seconds''


How long to sleep between images. Default 5 seconds (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_MANAGER
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 ALSO


X(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 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
!!AUTHOR


Jamie Zawinski
----

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Last edited on Tuesday, June 4, 2002 12:22:59 am by "perry"

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