hpftodit(1)

Name
hpftodit - create font description files for use with groff and grolj4

Synopsis
hpftodit [-aqs] [-i n] tfm-file map-file font-description

hpftodit -d tfm-file [map-file]

hpftodit --help

hpftodit -v
hpftodit --version

Description
hpftodit creates a font description file for use with a Hewlett-Packard LaserJet 4-series (or newer) printer and the grolj4(1) output driver of groff(1), using data from an HP tagged font metric (TFM) file. tfm-file is the name of the font's TFM file; Intellifont and TrueType TFM files are supported, but symbol set TFM files are not. map-file is a file giving the groff special character identifiers for glyphs in the font; this file should consist of a sequence of lines of the form
        m u c1 c2 ... [# comment]
where m is a decimal integer giving the glyph's MSL (Master Symbol List) number, u is a hexadecimal integer giving its Unicode character code, and c1, c2, ... are its groff glyph names (see groff_char(7) for a list). The values can be separated by any number of spaces and/or tabs. The Unicode value must use uppercase hexadecimal digits A–F, and must lack a leading “0x”, “u”, or “U+”. Unicode values corresponding to composite glyphs are decomposed; that is “u00C0” becomes “u0041_0300”. A glyph without a groff special character identifier may be named uXXXX if the glyph corresponds to a Unicode value, or as an unnamed glyph “---”. If the given Unicode value is in the Private Use Area (PUA) (0xE000–0xF8FF), the glyph is included as an unnamed glyph. Refer to groff_diff(1) for additional information about unnamed glyphs and how to access them.

Blank lines and lines beginning with “#” are ignored. A “#” following one or more groff names begins a comment. Because “#” is a valid groff name, it must appear first in a list of groff names if a comment is included, as in
        3   0023   #   # number sign
or
        3   0023   # sh   # number sign
whereas in
        3   0023   sh #   # number sign
the first “#” is interpreted as the beginning of the comment.

hpftodit writes output to font-description, a file named for the intended groff font name; if this operand is “-”, hpftodit writes to the standard output stream. The -i option directs hpftodit to automatically generate an italic correction, a left italic correction, and a subscript correction for each glyph. See groff_font(5).

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

-a  Include glyphs in the TFM file that are not included in map-file. A glyph with corresponding Unicode value is given the name uXXXX; a glyph without a Unicode value is included as an unnamed glyph “---”. A glyph with a Unicode value in the Private Use Area (0xE000–0xF8FF) is also included as an unnamed glyph.

    This option provides a simple means of adding Unicode-named and unnamed glyphs to a font without including them in the map file, but it affords little control over which glyphs are placed in a regular font and which are placed in a special font. The presence or absence of the -s option has some effect on which glyphs are included: without it, only the “text” symbol sets are searched for matching glyphs; with it, only the “mathematical” symbol sets are searched. Nonetheless, restricting the symbol sets searched isn't very selective—many glyphs are placed in both regular and special fonts. Normally, -a should be used only as a last resort.

-d  Dump information about the TFM file to the standard output stream; use this to ensure that a TFM file is a proper match for a font, and that its contents are suitable. The information includes the values of important TFM tags and a listing (by MSL number for Intellifont TFM files or by Unicode value for TrueType TFM files) of the glyphs included in the TFM file. The unit of measure “DU” for some tags indicates design units; there are 8782 design units per em for Intellifont fonts, and 2048 design units per em for TrueType fonts. Note that the accessibility of a glyph depends on its inclusion in a symbol set; some TFM files list many glyphs but only a few symbol sets.

    The glyph listing includes the glyph index within the TFM file, the MSL or Unicode value, and the symbol set and character code that will be used to print the glyph. If map-file is given, groff names are given for matching glyphs. If only the glyph index and MSL or Unicode value are given, the glyph does not appear in any supported symbol set and cannot be printed.

    With the -d option, map-file is optional, and output-font is ignored if given.

-i n
    Generate an italic correction for each glyph so that its width plus its italic correction is equal to n thousandths of an em plus the amount by which the right edge of the glyphs's bounding box is to the right of its origin. The minimum value hpftodit will write is zero.

    Also generate a subscript correction equal to the product of the tangent of the slant of the font and four fifths of the x-height of the font. If a subscript correction greater than the italic correction would result, use a subscript correction equal to the italic correction instead.

    Also generate a left italic correction for each glyph equal to n thousandths of an em plus the amount by which the left edge of the glyphs's bounding box is to the left of its origin. The left italic correction may be negative.

    This option normally is needed only with italic or oblique fonts; a value of 50 (0.05 em) usually is a reasonable choice.

-q  Suppress warnings about glyphs in the map file that were not found in the TFM file. Warnings never are given for unnamed glyphs or by glyphs named by their Unicode values. This option is useful when sending the output of hpftodit to the standard output stream.

-s  Add the special directive to the font description file, affecting the order in which HP symbol sets are searched for each glyph. Without this option, the “text” sets are searched before the “mathematical” symbol sets. With it, the search order is reversed.

Exit status
hpftodit exits with status 0 on successful operation, status 2 if the program cannot interpret its command-line arguments, and status 1 if it encounters an error during operation.

Files

/usr/share/groff/1.24.0/font/devlj4/DESC
    describes the lj4 output device.

/usr/share/groff/1.24.0/font/devlj4/F
    describes the font known as F on device lj4.

/usr/share/groff/1.24.0/font/devlj4/generate/Makefile
    is a make(1) script that uses hpftodit(1) to prepare the groff font description files above from HP TFM data; it can be used to regenerate them in the event the TFM files are updated.

/usr/share/groff/1.24.0/font/devlj4/generate/special.awk
    is an awk(1) script that corrects the Intellifont-based height metrics for several glyphs in the S (special) font for TrueType CG Times used in the HP LaserJet 4000 and later.

/usr/share/groff/1.24.0/font/devlj4/generate/special.map
/usr/share/groff/1.24.0/font/devlj4/generate/symbol.map
/usr/share/groff/1.24.0/font/devlj4/generate/text.map
/usr/share/groff/1.24.0/font/devlj4/generate/wingdings.map
    map MSL indices and HP Unicode PUA assignments to groff special character identifiers.

See also
groff(1), groff_diff(1), grolj4(1), groff_font(5)