phosphor man page on DigitalUNIX

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XScreenSaver(1)						       XScreenSaver(1)

       phosphor - simulates an old terminal with long-sustain phosphor

       phosphor	 [-display  host:display.screen]  [-window] [-root] [-install]
       [-visual visual] [-font font] [-scale int] [-ticks int] [-delay	usecs]
       [-program command]

       The  phosphor  program  draws text on the screen in a very large pixel‐
       lated font that looks like an old low resolution dumb tty.  The	pixels
       flare and fade out as if the phosphor was very long-sustain.

       phosphor accepts the following options:

       -window Draw on a newly-created window.	This is the default.

       -root   Draw on the root window.

	       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

       -font font-name
	       The  X font to use.  Phosphor can take any font and scale it up
	       to pixellate it.	 The default is fixed.

       -scale int
	       How much to scale the font up: in other words, the size in real
	       pixels of the simulated pixels.	Default 6.

       -ticks int
	       The number of colors to use when fading to black.  Default 20.

       -delay usecs
	       The  speed  of  the  terminal: how long to wait between drawing
	       each character.	Default 50000, or about 1/20th second.

       -program sh-command
	       The command to run to  generate	the  text  to  display.	  This
	       option  may  be	any string acceptable to /bin/sh.  The program
	       will be run at the end of a pipe, and any  characters  that  it
	       prints  to  stdout  will	 be printed on phosphor's window.  The
	       characters will be printed  artificially	 slowly,  as  per  the
	       -delay option above.  If the program exits, it will be launched
	       again after 5 seconds.

	       Note that phosphor is not a terminal  emulator:	programs  that
	       try  to	directly address the screen will not do what you might
	       expect.	Phosphor merely draws the  characters  on  the	screen
	       left  to	 right, top to bottom.	Lines wrap when they reach the
	       right edge, and the screen scrolls when	characters  reach  the

	       In  other  words,  programs like fortune(1) will work, but pro‐
	       grams like top(1) won't.

	       Here's a good trick, to get  phosphor  to  display  recent  web
	       search terms:
	       phosphor -program \
		 'wget -qO-'

       DISPLAY 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.

       wget(1), X(1), xscreensaver(1)

       Copyright © 1999 by Jamie Zawinski.  Permission to use,	copy,  modify,
       distribute,  and	 sell this software and its documentation for any pur‐
       pose 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	repre‐
       sentations are made about the suitability of this software for any pur‐
       pose.  It is provided "as is" without express or implied warranty.

       Jamie Zawinski <>, 27-Apr-99.

X Version 11			   30-Oct-99		       XScreenSaver(1)

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