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tfmtodit(1)                 General Commands Manual                tfmtodit(1)


       tfmtodit - adapt TeX Font Metrics files for use with groff and grodvi


       tfmtodit [-s] [-g gf-file] [-k skew-char] tfm-file map-file

       tfmtodit --help

       tfmtodit -v
       tfmtodit --version


       tfmtodit creates a font description file for use with groff(1)'s dvi
       output device.  tfm-file is the name of the TeX font metric file for
       the font.  map-file assigns groff ordinary or special character
       identifiers to glyph indices in the font; it should consist of a
       sequence of lines of the form
              i c1 ... cn
       where i is a position of the glyph in the font in decimal, and c1
       through cn are glyph identifiers in the form used by groff font
       descriptions.  If a glyph has no groff names but exists in tfm-file, it
       is put in the groff font description file as an unnamed glyph.  Output
       is written in groff_font(5) format to font-description, a file named
       for the intended groff font name.

       If the font is "special", meaning that groff should search it whenever
       a glyph is not found in the current font, use the -s option and name
       font-description in the fonts directive in the output device's DESC

       To do a good job of math typesetting, groff requires font metric
       information not present in tfm-file.  This is because TeX has separate
       math italic fonts, whereas groff uses normal italic fonts for math.
       The additional information required by groff is given by the two
       arguments to the math_fit macro in the Metafont programs for the
       Computer Modern fonts.  In a text font (a font for which math_fit is
       false), Metafont normally ignores these two arguments.  Metafont can be
       made to put this information into the GF ("generic font") files it
       produces by loading the following definition after cmbase when creating
              def ignore_math_fit(expr left_adjustment,right_adjustment) =
                  special "adjustment";
                  numspecial left_adjustment*16/designsize;
                  numspecial right_adjustment*16/designsize;
       For the EC font family, load the following definition after exbase;
       consider patching locally.
              def ignore_math_fit(expr left_adjustment,right_adjustment) =
                  ori_special "adjustment";
                  ori_numspecial left_adjustment*16/designsize;
                  ori_numspecial right_adjustment*16/designsize;
       The only difference from the previous example is the "ori_" prefix to
       "special" and "numspecial".  The GF file created using this modified
       cm.base or should be specified with the -g option, which
       should not be given for a font for which math_fit is true.


       --help displays a usage message, while -v and --version show version
       information; all exit afterward.

       -g gf-file
              Use the gf-file produced by Metafont containing "special" and
              "numspecial" commands to obtain additional font metric

       -k skew-char
              The skew character of this font is at position skew-char.
              skew-char should be an integer; it may be given in decimal, with
              a leading 0 in octal, or with a leading 0x in hexadecimal.  Any
              kerns whose second component is skew-char are ignored.

       -s     Add the special directive to the font description file.


              describes the dvi output device.

              describes the font known as F on device dvi.

              map glyph indices in TeX fonts to groff ordinary and special
              character identifiers. is used for TREC, TIEC, TBEC,
              TBIEC, HREC, HIEC, HBEC, HBIEC, CWEC, and CWIEC; for
              SA; for SB; for TRTC, TITC, TBTC, TBITC, HRTC,
              HITC, HBTC, HBITC, CWTC, and CWITC; for TB, HR, HI, HB,
              and HBI; for EX; for TI and TBI;
              for CWI; for MI; for TR; for S;
     for SC; and for CW.

See also

       groff(1), grodvi(1), groff_font(5)

groff 1.23.0                      2 July 2023                      tfmtodit(1)

groff 1.23.0 - Generated Fri Dec 22 19:41:11 CST 2023
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