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phosphor(6)		      XScreenSaver manual		   phosphor(6)

       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] [-meta] [-esc] [-bs] [-del] [-fps]

       The phosphor program draws text on the screen in	a very large pixelated
       font that looks like an old low resolution dumb tty.  The pixels	 flare
       and  fade  out  as if the phosphor was very long-sustain.  It is	also a
       fully functional	vt100 terminal emulator.

       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 pixelate 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.

       -pty    Launch  the sub-program under a PTY, so that it can address the
	       screen directly.	 This is the default.

       -pipe   Launch the sub-program at the end of a pipe: do not let it  ad-
	       dress the screen	directly.

       -program	sh-command
	       The  command  to	run to generate	the text to display.  This op-
	       tion may	be any string acceptable to /bin/sh.  The program will
	       be  run at the end of a pty or 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 -de-
	       lay option above.  If the program exits,	it  will  be  launched
	       again after 5 seconds.

	       For example:
	       phosphor	-program 'cat /usr/src/linux*/README'
	       phosphor	-program 'ping localhost'
	       phosphor	-program 'ps -e'
	       phosphor	-program 'od -txC -w6 /dev/random'
	       phosphor	-program 'cat /dev/random'
	       phosphor	-scale 2 -geom =1280x1024 -program 'top'
	       phosphor	-scale 4 -geom =1280x1024 \
			-program 'mtr'
	       phosphor	-program 'xemacs -nw -q	-f life'
	       phosphor	-scale 5 -geom =1280x1024 \
			-program 'xemacs -nw -q	--eval "(hanoi 5)"'
	       If  you	have  the festival(1) text-to-speech system installed,
	       you can have it read the	screen as phosphor prints it:
	       phosphor	-program \
		   'xscreensaver-text |	tee /dev/stderr	| festival --tts'
	       You can also use	 phosphor  as  a  lo-fi	 replacement  for  the
	       xterm(1)	and gnome-terminal(1) terminal emulators:
	       phosphor	-delay 0 -program tcsh

       -esc    When  the user types a key with the Alt or Meta keys held down,
	       send an ESC character first.  This is the default.

       -meta   When Meta or Alt	are held down, set the high bit	on the charac-
	       ter instead.

       -del    Swap Backspace and Delete.  This	is the default.

       -bs     Do not swap Backspace and Delete.

       -fps    Display the current frame rate and CPU load.

       By  default, phosphor allocates a pseudo-tty for	the sub-process	to run
       under.  This has	the desirable side effect that	the  program  will  be
       able to use ioctl(2) to fetch information about terminal	parameters and
       window size, which many programs	(such as top(1)) need to run properly.
       phosphor	 will  also  set the environment variable TERM to vt100	in the
       child process.

       Any characters typed on the phosphor window will	be passed along	to the
       sub-process.  (Note that	this only works	when running in	"window" mode,
       not when	running	in -root mode under xscreensaver.)

       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.

       TERM    to inform the sub-process of the	type of	terminal emulation.

       xscreensaver(1),	 xscreensaver-text(1),	fortune(1),  apple2(6),	 star-
       wars(6),	fontglide(6), ljlatest(6), dadadodo(1),	webcollage(6),	drift-
       net(1) EtherPEG,	EtherPeek, console_codes(4).

       Copyright (C) 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.  Pty	and vt100 emulation by
       Fredrik Tolf <>.

X Version 11		      5.44 (20-Mar-2020)		   phosphor(6)


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