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FONTS.TXT
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1992-08-27
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The program wsfcomp.exe can be used to create font files (.fon files)
from so-called "font source files" (.fsc files).
Eg to compile diary.fsc to produce diary.fon just type
wsfcomp diary
The format of font source files can be judged by looking at the
example .fsc files supplied:
sys$norm.fsc source of the Series3 system font
sys$bold.fsc source of the Series3 bold font
sys$digt.fsc source of the Series3 "digits" font
diary.fsc special characters used in the Agenda display
shgraph.fsc the "tiny" font used in the Spreadsheet
sh3.fsc other special characters used by the Spreadsheet
bold.fsc a "Greek" flavour version of sys$bold.fsc
norm.fsc a "Greek" flavour version of sys$norm.fsc
A font source file contains a header section followed by patterns
which make up the font, as in the following extract from the
beginning of a font source file:
*name System mono
*descent 2
*height 10
*maxwid 7
*flag ascii
*flag cp850
*char 28
100000000000
100001100000
100001100000
101111111100
100111111000
110011110111
000001100000
000000000000
111111111111
100000000000
0000000
0000000
0001000
0001100
1111110
1111110
0001100
0001000
0000000
0000000
0000000
0000011
0000011
0010011
0110011
1111111
1111111
0110000
0010000
0000000
The keywords have the following meanings:
-----------------------------------------
*name The font name (maximum length 16 characters)
*descent <n> The descent for the font
*height <n> The height for the font
*maxwid <n> Not the real maximum width, but the width of the
widest normal character
*flag Some informational flags
*char <n> Skip all characters up to the specified code.
Character codes start at 0 and follow sequentially
until the next *char statement
The keyword "*special 1" may also be present, to specify a font
suitable for "fast" blitting onto the screen. If present, this
keyword must come before the *height statement. ("Fast" fonts must
have all their widths less than 9 pixels.)
If the height of a character defined is less than that defined in the
header, blank rows are added at the top.
Possible values for "*flag" (each one defined on its own line) are
"ascii", "cp850", "bold", "italic", and "serif".
For some more details about fonts, see eg the section on gINFO in the
Opl Programming Manual.
Note that only the first letter of keywords and flagnames is
significant. Thus "*max_width" and "*maxwid" have the same effect.
One tip when editing .fsc files is to temporarily change all '1's
into graphics square characters (ascii 219, say), and all '0's into
dots. Then change them back when you're finished.