Provided by: xscreensaver-data-extra_5.08-0ubuntu3_i386 bug


        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
                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'
                     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 <>.