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decayscreen ()
  • >> decayscreen (1) ( Solaris man: Команды и прикладные программы пользовательского уровня )
  • decayscreen (1) ( Linux man: Команды и прикладные программы пользовательского уровня )
  • 
    NAME
         decayscreen - make a screen meltdown.
    
    SYNOPSIS
         decayscreen [-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.
    
    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),  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  fal-
                 ling  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  set-
                 ting grabVideoProbability 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 ALSO
         X(1), xscreensaver(1)
    
    COPYRIGHT
         Copyright 1992 by Vivek Khera.   Permission  to  use,  copy,
         modify,  distribute, and sell this software and its documen-
         tation for any purpose is hereby granted without  fee,  pro-
         vided  that  the above copyright notice appear in all copies
         and that both that  copyright  notice  and  this  permission
         notice  appear  in supporting documentation.  No representa-
         tions 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.
    
    
    
    


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