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.
