1TFMTODIT(1)                 General Commands Manual                TFMTODIT(1)
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NAME

6       tfmtodit - create font files for use with groff -Tdvi
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SYNOPSIS

9       tfmtodit [-s] [-g gf_file] [-k skewchar] tfm_file map_file font
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11       tfmtodit --help
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13       tfmtodit -v
14       tfmtodit --version
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DESCRIPTION

17       tfmtodit creates a font file for use with groff -Tdvi.  tfm_file is the
18       name of the TeX font metric file for the font.  map_file is a file giv‐
19       ing  the  groff names for characters in the font; this file should con‐
20       sist of a sequence of lines of the form:
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22              n c1 c2 ...
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24       where n is a decimal integer giving the position of  the  character  in
25       the  font,  and c1, c2,...  are the groff names of the character.  If a
26       character has no groff names but exists in the tfm file, then  it  will
27       be  put  in  the  groff font file as an unnamed character.  font is the
28       name of the groff font file.  The groff font file is written to font.
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30       The -s option should be given if the font is special (a font is special
31       if troff should search it whenever a character is not found in the cur‐
32       rent font.)  If the font is special, it should be listed in  the  fonts
33       command  in  the  DESC  file; if it is not special, there is no need to
34       list it, since troff can automatically mount it when it's first used.
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36       To do a good job of math typesetting, groff requires font metric infor‐
37       mation  not  present  in the tfm file.  The reason for this is that TeX
38       has separate math italic fonts whereas groff uses normal  italic  fonts
39       for math.  The additional information required by groff is given by the
40       two arguments to the math_fit macro in the Metafont  programs  for  the
41       Computer  Modern  fonts.  In a text font (a font for which math_fitting
42       is false), Metafont normally ignores these two arguments.  Metafont can
43       be made to put this information in the gf file by loading the following
44       definition after cmbase when creating cm.base:
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46              def ignore_math_fit(expr left_adjustment,right_adjustment) =
47                  special "adjustment";
48                  numspecial left_adjustment*16/designsize;
49                  numspecial right_adjustment*16/designsize;
50                  enddef;
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52       For the EC font family, load the following definition after exbase  (it
53       is probably easiest to patch exbase.mf locally):
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55              def ignore_math_fit(expr left_adjustment,right_adjustment) =
56                  ori_special "adjustment";
57                  ori_numspecial left_adjustment*16/designsize;
58                  ori_numspecial right_adjustment*16/designsize;
59                  enddef;
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61       The  gf  file  created  using this modified cm.base or exbase should be
62       specified with the -g option.  The -g option should not be given for  a
63       font for which math_fitting is true.
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OPTIONS

66       Whitespace is permitted between a command-line option and its argument.
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68       -v     Print the version number.
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70       -s     The  font  is  special.  The effect of this option is to add the
71              special command to the font file.
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73       -kn    The skewchar of this font is at position n.  n should be an  in‐
74              teger; it may be given in decimal, or with a leading 0 in octal,
75              or with a leading 0x in hexadecimal.  The effect of this  option
76              is  to  ignore any kerns whose second component is the specified
77              character.
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79       -ggf_file
80              gf_file is a gf file produced by Metafont containing special and
81              numspecial commands giving additional font metric information.
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FILES

84       /usr/share/groff/1.22.4/font/devdvi/DESC
85              Device description file.
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87       /usr/share/groff/1.22.4/font/devdvi/F
88              Font description file for font F.
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SEE ALSO

91       groff(1), grodvi(1), groff_font(5)
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95groff 1.22.4                    20 January 2022                    TFMTODIT(1)
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