ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...

[xscreensaver] / local / man / man.1 / decayscreen.1

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+.TH XScreenSaver 1 "05-Apr-1999" "X Version 11"
+.SH NAME
+decayscreen - make a screen meltdown.
+.SH SYNOPSIS
+.B decayscreen
+[\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-mono] [\-install] [\-visual \fIvisual\fP] [\-delay \fIusecs\fP] [\-mode \fImode\fP]
+.SH DESCRIPTION
+The \fIdecayscreen\fP program creates a melting effect by randomly
+shifting rectangles around the screen.
+.SH OPTIONS
+.I decayscreen
+accepts the following options:
+.TP 8
+.B \-window
+Draw on a newly-created window.  This is the default.
+.TP 8
+.B \-root
+Draw on the root window.
+.TP 8
+.B \-mono 
+If on a color display, pretend we're on a monochrome display.
+.TP 8
+.B \-install
+Install a private colormap for the window.
+.TP 8
+.B \-visual \fIvisual\fP
+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.
+.TP 8
+.B \-delay \fImicroseconds\fP
+Slow it down.
+.TP 8
+.B \-mode \fImode\fP
+The direction in which the image should tend to slide.  Legal values are
+\fIrandom\fP (meaning pick one), \fIup\fP, \fIleft\fP, \fIright\fP, 
+\fIdown\fP, \fIupleft\fP, \fIdownleft\fP, \fIupright\fP, \fIdownright\fP, 
+\fIshuffle\fP (meaning perfer no particular direction), \fIin\fP (meaning
+move things toward the center), \fIout\fP (meaning move things away
+from the center), \fImelt\fP (meaning melt straight downward), and \fIstretch\fP 
+(meaning stretch the screen downward).
+.SH 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.
+.PP
+.TP 8
+.B grabVideoProbability \fR(Float)\fP
+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.
+.TP 8
+.B videoDevice \fR(Integer)\fP
+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
+\fBgrabVideoProbability\fP to 0.0.)
+.TP 8
+.B videoGain \fR(Float)\fP
+The amount by which to brighten the grabbed image.  This defaults to 2.2.
+.SH ENVIRONMENT
+.PP
+.TP 8
+.B DISPLAY
+to get the default host and display number.
+.TP 8
+.B XENVIRONMENT
+to get the name of a resource file that overrides the global resources
+stored in the RESOURCE_MANAGER property.
+.SH "SEE ALSO"
+X(1),
+xscreensaver(1)
+.SH COPYRIGHT
+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.
+.SH 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.
+