14 .TH XScreenSaver 1 "5-May-2004" "X Version 11"
16 phosphor - simulates an old terminal with long-sustain phosphor
19 [\-display \fIhost:display.screen\fP] [\-window] [\-root] [\-install]
20 [\-visual \fIvisual\fP] [\-font \fIfont\fP] [\-scale \fIint\fP]
21 [\-ticks \fIint\fP] [\-delay \fIusecs\fP] [\-program \fIcommand\fP]
22 [\-meta] [\-esc] [\-bs] [\-del]
24 The \fIphosphor\fP program draws text on the screen in a very large
25 pixelated font that looks like an old low resolution dumb tty. The
26 pixels flare and fade out as if the phosphor was very
27 long-sustain. It is also a fully functional vt100 terminal emulator.
30 accepts the following options:
33 Draw on a newly-created window. This is the default.
36 Draw on the root window.
39 Install a private colormap for the window.
41 .B \-visual \fIvisual\fP\fP
42 Specify which visual to use. Legal values are the name of a visual class,
43 or the id number (decimal or hex) of a specific visual.
45 .B \-font \fIfont-name\fP
46 The X font to use. Phosphor can take any font and scale it up to pixelate
47 it. The default is \fIfixed\fP.
50 How much to scale the font up: in other words, the size in real pixels of
51 the simulated pixels. Default 6.
54 The number of colors to use when fading to black. Default 20.
56 .B \-delay \fIusecs\fP
57 The speed of the terminal: how long to wait between drawing each character.
58 Default 50000, or about 1/20th second.
61 Launch the sub-program under a PTY, so that it can address the screen
62 directly. This is the default.
65 Launch the sub-program at the end of a pipe: do not let it address the
68 .B \-program \fIsh-command\fP
69 The command to run to generate the text to display. This option may
70 be any string acceptable to /bin/sh. The program will be run at the
71 end of a pty or pipe, and any characters that it prints to \fIstdout\fP
72 will be printed on phosphor's window. The characters will be printed
73 artificially slowly, as per the \fI\-delay\fP option above. If the
74 program exits, it will be launched again after 5 seconds.
78 phosphor -program 'cat /usr/src/linux*/README'
79 phosphor -program 'ping localhost'
80 phosphor -program 'ps -e'
81 phosphor -program 'od -txC -w6 /dev/random'
82 phosphor -program 'cat /dev/random'
83 phosphor -scale 2 -geom =1280x1024 -program 'top'
84 phosphor -scale 4 -geom =1280x1024 \\
85 -program 'mtr www.kernel.org'
86 phosphor -program 'xemacs -nw -q -f life'
87 phosphor -scale 5 -geom =1280x1024 \\
88 -program 'xemacs -nw -q --eval "(hanoi 5)"'
90 You can also use \fIphosphor\fP as a lo-fi replacement for the
93 .BR gnome-terminal (1)
96 phosphor -delay 0 -program tcsh
100 When the user types a key with the Alt or Meta keys held down, send an
101 ESC character first. This is the default.
104 When Meta or Alt are held down, set the high bit on the character instead.
107 Swap Backspace and Delete. This is the default.
110 Do not swap Backspace and Delete.
111 .SH TERMINAL EMULATION
112 By default, \fIphosphor\fP allocates a pseudo-tty for the sub-process to
113 run under. This has the desirable side effect that the program will be
116 to fetch information about terminal parameters and window size, which
117 many programs (such as
119 need to run properly. \fIphosphor\fP will also set the environment
120 variable \fITERM\fP to \fIvt100\fP in the child process.
122 Any characters typed on the phosphor window will be passed along to
123 the sub-process. (Note that this only works when running in "window"
124 mode, not when running in \fI\-root\fP mode under xscreensaver.)
129 to get the default host and display number.
132 to get the name of a resource file that overrides the global resources
133 stored in the RESOURCE_MANAGER property.
136 to inform the sub-process of the type of terminal emulation.
138 .BR xscreensaver (1),
149 .BR console_codes (4).
151 Copyright \(co 1999 by Jamie Zawinski. Permission to use, copy, modify,
152 distribute, and sell this software and its documentation for any purpose is
153 hereby granted without fee, provided that the above copyright notice appear
154 in all copies and that both that copyright notice and this permission notice
155 appear in supporting documentation. No representations are made about the
156 suitability of this software for any purpose. It is provided "as is" without
157 express or implied warranty.
159 Jamie Zawinski <jwz@jwz.org>, 27-Apr-99.
160 Pty and vt100 emulation by Fredrik Tolf <fredrik@dolda2000.com>.