XScreenSaver(1)XScreenSaver(1)NAMEdecayscreen - make a screen meltdown.
SYNOPSISdecayscreen [-display host:display.screen] [-window] [-root] [-mono]
[-install] [-visual visual] [-delay usecs] [-mode mode]
DESCRIPTION
The decayscreen program creates a melting effect by randomly shifting
rectangles around the screen.
OPTIONSdecayscreen 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), and stretch (meaning stretch
the screen downward).
RESOURCES
On some systems (currently, only SGIs), this program can, instead of
grabbing a desktop image, grab a frame of video from an external camera
and manipulate that instead. The following resources control that.
grabVideoProbability (Float)
What portion of the time to grab video rather than a screen
image, between 0.0 and 1.0. Defaults to 0.5, or half the time.
videoDevice (Integer)
The number of the default video input device to check first.
If unspecified, the default camera (from videopanel(1)) will be
checked first. After that, all other available video input
devices will be checked in order.
The first one which produces a non-black image will be used.
If all images are black, the others will be re-checked a few
times before giving up and falling back to simply grabbing a
desktop image (but note that this takes a few seconds, so if
you don't actually have any video sources hooked up, you should
consider turning off video grabbing by setting grabVideoProba‐
bility to 0.0.)
videoGain (Float)
The amount by which to brighten the grabbed image. This
defaults to 2.2.
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.
SEE ALSOX(1), xscreensaver(1)COPYRIGHT
Copyright 1992 by Vivek Khera. Permission to use, copy, modify, dis‐
tribute, 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 per‐
mission 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.
X Version 11 05-Apr-1999 XScreenSaver(1)