Provided by: xscreensaver-data-extra_5.15-2ubuntu1_i386 bug

NAME

       phosphor - simulates an old terminal with long-sustain phosphor

SYNOPSIS

       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]

DESCRIPTION

       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.

OPTIONS

       phosphor accepts the following options:

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

       -root   Draw on the root window.

       -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.

       -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
               address the screen directly.

       -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 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
               -delay 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 www.kernel.org'
               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
               character 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.

TERMINAL EMULATION

       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.)

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.

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

SEE ALSO

       xscreensaver(1),    xscreensaver-text(1),    fortune(1),    apple2(6x),
       starwars(6x), fontglide(6x), ljlatest(6x), dadadodo(1), webcollage(6x),
       driftnet(1) EtherPEG, EtherPeek, console_codes(4).

COPYRIGHT

       Copyright (C) 1999 by Jamie Zawinski.  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.

AUTHOR

       Jamie Zawinski <jwz@jwz.org>, 27-Apr-99.  Pty and  vt100  emulation  by
       Fredrik Tolf <fredrik@dolda2000.com>.