mapscrn
load screen output mapping table
see also :
setfont
Synopsis
mapscrn
[-v] [-o map.orig] mapfile
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description
The
mapscrn command is obsolete - its function is now
built-in into setfont. However, for backwards compatibility
it is still available as a separate command.
The
mapscrn command loads a user defined output character
mapping table into the console driver. The console driver
may be later put into use user-defined mapping table
mode by outputting a special escape sequence to the console
device. This sequence is <esc>(K for the
G0 character set and <esc>)K for the
G1 character set. When the -o option is given,
the old map is saved in map.orig.
files
/usr/share/consoletrans is the default directory for
screen mappings.
input format
The mapscrn command can read the map in either of two
formats:
1. 256 or 512 bytes binary data
2. two-column text file
Format (1) is a direct image of the translation table. The
256-bytes tables are direct-to-font, the 512-bytes tables are
user-to-unicode tables. Format (2) is used to fill the
table as follows: cell with offset mentioned in the first
column is filled with the value mentioned in the second column.
When values larger than 255 occur, or values are written using
the U+xxxx notation, the table is assumed to be a user-to-unicode
table, otherwise it is a direct-to-font table.
Values in the file may be specified in one of several
formats:
1. Decimal: String of decimal digits not starting with ’0’
2. Octal: String of octal digits beginning with ’0’.
3. Hexadecimal: String of hexadecimal digits preceded by
"0x".
4. Unicode: String of four hexadecimal digits preceded by
"U+".
5. Character: Single character enclosed in single quotes.
(And the binary value is used.) Note that blank, comma, tab
character and ’#’ cannot be specified with this format.
6. UTF-8 Character: Single (possibly multi-byte) UTF-8
character, enclosed in single quotes.
Note that control characters (with codes < 32) cannot be
re-mapped with mapscrn because they have special meaning
for the driver.
use
There are two kinds of mapping tables: direct-to-font tables,
that give a font position for each user byte value, and
user-to-unicode tables that give a unicode value for each user
byte. The corresponding glyph is now found using the unicode
index of the font. The command
mapscrn trivial
sets up a one-to-one direct-to-font table where user bytes
directly address the font. This is useful for fonts that are in
the same order as the character set one uses. A command like
mapscrn 8859-2
sets up a user-to-unicode table that assumes that the user uses
ISO 8859-2.
see also
setfont
author
Copyright (C)
1993 Eugene G. Crosser
<crosser[:at:]pccross.msk[:dot:]su>
This software and documentation may be distributed
freely.