Article: Q66925
Product(s): See article
Version(s): 6.00 | 6.00
Operating System(s): MS-DOS | OS/2
Keyword(s): ENDUSER | docerr s_quickc | mspl13_c
Last Modified: 18-NOV-1990
_getfontinfo() is documented as returning a _fontinfo structure
containing information including type, facename, filename, ascent,
pixheight, pixwidth, and avgwidth about the font currently set.
However, _getfontinfo() only reads these values from the .FON file in
which they are stored. This can cause problems when using vector fonts
that have been scaled by the _setfont() function because the values
for ascent, pixheight, and avgwidth will probably be incorrect.
Vector fonts are stored in the .FON file as a series of equations that
can be multiplied by some scaling factor to generate fonts of
different sizes. By default, the scale factor is 1. When
_getfontinfo() is called, it will always return the values for ascent,
pixheight, and avgwitch assuming the default scale factor. If the font
is scaled to some type size other than the default (using _setfont()
with WxHy parameters), the new values for ascent, pixheight, and
avgwidth will need to be recalculated. The factor can be determined by
dividing the pixheight value returned from _getfontinfo() by the Hy
parameter passed to _setfont().