The decayscreen program creates a melting effect by randomly
shifting rectangles around the screen.
The image that it manipulates will be grabbed from the portion of
the screen underlying the window, or from the system's video input,
or from a random file on disk, as indicated by
the grabDesktopImages, grabVideoFrames,
and chooseRandomImages options in the ~/.xscreensaver
file; see
xscreensaver-demo(1)
for more details.
OPTIONS
decayscreen
accepts the following options:
-window
Draw on a newly-created window. This is the default.
-root
Draw on the root window.
-mono
If on a color display, pretend we're on a monochrome display.
-install
Install a private colormap for the window.
-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.
-delay microseconds
Slow it down.
-mode mode
The direction in which the image should tend to slide. Legal values are
random (meaning pick one), up, left, right,
down, upleft, downleft, upright, downright,
shuffle (meaning perfer no particular direction), in (meaning
move things toward the center), out (meaning move things away
from the center), melt (meaning melt straight
downward), stretch (meaning stretch the screen downward),
and fuzz (meaning go blurry instead of melty).
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.
Copyright 1992 by Vivek Khera. 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
Vivek Khera <khera@cs.duke.edu>, 05-Aug-93; based on code by David Wald, 1988.
Modified by jwz, 28-Nov-97.
Modified by Rick Schultz <rick@skapunx.net> 05-Apr-1999.
