TFMTODIT(1)						      General Commands Manual						       TFMTODIT(1)

NAME

       tfmtodit - create font files for use with groff -Tdvi

SYNOPSIS

       tfmtodit [ -sv ] [ -ggf_file ] [ -kskewchar ] tfm_file map_file font

       It is possible to have whitespace between a command line option and its parameter.

DESCRIPTION

       tfmtodit  creates a font file for use with groff -Tdvi.	tfm_file is the name of the TeX font metric file for the font.	map_file is a file
       giving the groff names for characters in the font; this file should consist of a sequence of lines of the form:

	      n c1 c2 ...

       where n is a decimal integer giving the position of the character in the font, and c1, c2,...  are the groff names of the character.  If  a
       character  has  no groff names but exists in the tfm file, then it will be put in the groff font file as an unnamed character.  font is the
       name of the groff font file.  The groff font file is written to font.

       The -s option should be given if the font is special (a font is special if troff should search it whenever a character is not found in  the
       current	font.)	 If the font is special, it should be listed in the fonts command in the DESC file; if it is not special, there is no need
       to list it, since troff can automatically mount it when it's first used.

       To do a good job of math typesetting, groff requires font metric information not present in the tfm file.  The reason for this is that  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-
       ting  is false), Metafont normally ignores these two arguments.	Metafont can be made to put this information in the gf file by loading the
       following definition after cmbase when creating cm.base:

	      def ignore_math_fit(expr left_adjustment,right_adjustment) =
		  special "adjustment";
		  numspecial left_adjustment*16/designsize;
		  numspecial right_adjustment*16/designsize;
		  enddef;

       For the EC font family, load the following definition after exbase (it is probably easiest to patch exbase.mf 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;
		  enddef;

       The gf file created using this modified cm.base or exbase should be specified with the -g option.  The -g option should not be given for  a
       font for which math_fitting is true.

OPTIONS

       -v     Print the version number.

       -s     The font is special.  The effect of this option is to add the special command to the font file.

       -kn    The  skewchar  of  this font is at position n.  n should be an integer; it may be given in decimal, or with a leading 0 in octal, or
	      with a leading 0x in hexadecimal.  The effect of this option is to ignore any kerns whose second component is the specified  charac-
	      ter.

       -ggf_file
	      gf_file is a gf file produced by Metafont containing special and numspecial commands giving additional font metric information.

FILES

       /usr/share/groff/1.21/font/devdvi/DESC  Device description file.

       /usr/share/groff/1.21/font/devdvi/F     Font description file for font F.

SEE ALSO

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

Groff Version 1.21						 31 December 2010						       TFMTODIT(1)