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
It depends heavily on the various PBM tools (e.g.,
Selection of random image files is done by running the
program. Capture of video frames (if requested) is done by running the
program. The options of whether to do video, and which directory to
search for images, are specified in the ~/.xscreensaver file.
accepts the following options:
Draw on the root window. This is the default.
Instead of grabbing an image from disk or video, read an image
to maniupulate from stdin. This image must be in
format. The program will still perform repeated random image
transformations, but it will always use this one image as its starting point.
How long to sleep between images. Default 5 seconds (the actual
elapsed time is significantly longer, due to processing time.)
Instead of displaying the image on a window or on the root, write the new
image on stdout, and exit.
Use this directory instead of the imageDirectory specified in
the ~/.xscreensaver file.
to get the default host and display number.
to get the name of a resource file that overrides the global resources
stored in the RESOURCE_MANAGER property.
It might be interesting to rewrite this to use
plugins instead of the pbm tools. It probably wouldn't be any faster,
but there would be a wider variety of effects available.