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From: lwv27@CAS.BITNET (Larry W. Virden ext. 2487)
Newsgroups: comp.windows.x
Subject: Xterm font/character set question
Message-ID: <9105231045.AA26084@cas.org>
Date: 23 May 91 14:45:18 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Lines: 71

I am trying to figure out xterm's font handling.  In the various
docs that I have, there is a description of a series of escape
sequences which supposedly switch between various character sets
called G0-G3 .  Are these supposed to correspond to font 1-4 ?

When I run the following script (note that one line is changed from
the literal character 'escape' to a '^[' for mail purposes...)
I do not see what I expect - which is the current screen changing to
the various fonts.  Instead, when Esc(0 is issued the terminal
goes into a line drawing mode of the current window font.  )0, *0 and
+0 as well as all other sequences in the remaining
of the script go to the current alpha mode font.


There DOES appear to be an escape sequence which tells xterm to go
and set the current window to a specific font - Esc ] 50 ; {font name} ^G
but there is a problem - there does not appear to be a sequence to SAVE
OFF the current font name.  Thus, once you go to a font, you cannot
return to the previous without knowing where you were.  This makes
writing general purpose shell scripts who need to change the font
for some purpose rather annoying.

Anyways, anyone know what the G0-G4 stuff is SUPPOSED to do?


#! /bin/ksh

lst="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!@#$%^&*()_-|

escape='^['

for i in 0 A B ; do
        echo "$escape(B" ; echo Testing '(' $i
        echo "$escape($i"
        echo $lst
        read a
        echo "$escape(B" ; echo Testing ')' $i
        echo "$escape)$i"
        echo $lst
        read a
        echo "$escape(B" ; echo Testing '*' $i
        echo "$escape*$i"
        echo $lst
        read a
        echo "$escape(B" ; echo Testing '+' $i
        echo "$escape+$i"
        echo $lst
        read a
done

echo "$escape(B" ; echo Done Testing

echo "$escapeN" ; echo Testing N
        echo $lst
echo "$escape(B"
echo "$escapeO" ; echo Testing O
        echo $lst
echo "$escape(B"

echo "$escapen" ; echo Testing n
        echo $lst
echo "$escape(B"
echo "$escapeo" ; echo Testing o
        echo $lst
echo "$escape(B"
exit 1
--
Larry W. Virden                 UUCP: osu-cis!chemabs!lwv27
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