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)"'
92 text-to-speech system installed, you can have it read the screen as
96 'xscreensaver-text | tee /dev/stderr | festival --tts'
98 You can also use \fIphosphor\fP as a lo-fi replacement for the
101 .BR gnome-terminal (1)
104 phosphor -delay 0 -program tcsh
108 When the user types a key with the Alt or Meta keys held down, send an
109 ESC character first. This is the default.
112 When Meta or Alt are held down, set the high bit on the character instead.
115 Swap Backspace and Delete. This is the default.
118 Do not swap Backspace and Delete.
119 .SH TERMINAL EMULATION
120 By default, \fIphosphor\fP allocates a pseudo-tty for the sub-process to
121 run under. This has the desirable side effect that the program will be
124 to fetch information about terminal parameters and window size, which
125 many programs (such as
127 need to run properly. \fIphosphor\fP will also set the environment
128 variable \fITERM\fP to \fIvt100\fP in the child process.
130 Any characters typed on the phosphor window will be passed along to
131 the sub-process. (Note that this only works when running in "window"
132 mode, not when running in \fI\-root\fP mode under xscreensaver.)
137 to get the default host and display number.
140 to get the name of a resource file that overrides the global resources
141 stored in the RESOURCE_MANAGER property.
144 to inform the sub-process of the type of terminal emulation.
146 .BR xscreensaver (1),
147 .BR xscreensaver-text (1),
158 .BR console_codes (4).
160 Copyright \(co 1999 by Jamie Zawinski. Permission to use, copy, modify,
161 distribute, and sell this software and its documentation for any purpose is
162 hereby granted without fee, provided that the above copyright notice appear
163 in all copies and that both that copyright notice and this permission notice
164 appear in supporting documentation. No representations are made about the
165 suitability of this software for any purpose. It is provided "as is" without
166 express or implied warranty.
168 Jamie Zawinski <jwz@jwz.org>, 27-Apr-99.
169 Pty and vt100 emulation by Fredrik Tolf <fredrik@dolda2000.com>.