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<title>Hershey fonts for Ghostscript</title>
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<!-- $Id: Hershey.htm,v 1.5 2002/02/21 21:36:33 giles Exp $ -->
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<!-- Originally: hershey.txt -->
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<h1>Hershey fonts for Ghostscript</h1>
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<!-- [1.2 begin table of contents] ========================================= -->
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<p>
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This file, unlike the rest of Ghostscript, consists entirely of information
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copied from public sources. It therefore is not covered by the
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Ghostscript copyright or license: it is in the public domain.
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<p>For other information, see the <a href="Readme.htm">Ghostscript
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overview</a>. You can also read about <a href="Fonts.htm">Ghostscript
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fonts</a> in general.
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<!-- [2.0 begin contents] ================================================== -->
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<pre>
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Mod.sources: Volume 4, Issue 42
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Submitted by: pyramid!octopus!pete (Pete Holzmann)
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This is part 1 of five parts of the first Usenet distribution of
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the Hershey Fonts. See the README file for more details.
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Peter Holzmann, Octopus Enterprises
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USPS: 19611 La Mar Court, Cupertino, CA 95014
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UUCP: {hplabs!hpdsd,pyramid}!octopus!pete
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Phone: 408/996-7746
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This distribution is made possible through the collective encouragement
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of the Usenet Font Consortium, a mailing list that sprang to life to get
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this accomplished and that will now most likely disappear into the mists
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of time... Thanks are especially due to Jim Hurt, who provided the packed
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font data for the distribution, along with a lot of other help.
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This file describes the Hershey Fonts in general, along with a description of
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the other files in this distribution and a simple re-distribution restriction.
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USE RESTRICTION:
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This distribution of the Hershey Fonts may be used by anyone for
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any purpose, commercial or otherwise, providing that:
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1. The following acknowledgements must be distributed with
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the font data:
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- The Hershey Fonts were originally created by Dr.
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A. V. Hershey while working at the U. S.
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National Bureau of Standards.
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- The format of the Font data in this distribution
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was originally created by
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James Hurt
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Cognition, Inc.
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900 Technology Park Drive
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Billerica, MA 01821
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(mit-eddie!ci-dandelion!hurt)
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2. The font data in this distribution may be converted into
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any other format *EXCEPT* the format distributed by
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the U.S. NTIS (which organization holds the rights
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to the distribution and use of the font data in that
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particular format). Not that anybody would really
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*want* to use their format... each point is described
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in eight bytes as "xxx yyy:", where xxx and yyy are
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the coordinate values as ASCII numbers.
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*PLEASE* be reassured: The legal implications of NTIS' attempt to control
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a particular form of the Hershey Fonts *are* troubling. HOWEVER: We have
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been endlessly and repeatedly assured by NTIS that they do not care what
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we do with our version of the font data, they do not want to know about it,
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they understand that we are distributing this information all over the world,
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etc etc etc... but because it isn't in their *exact* distribution format, they
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just don't care!!! So go ahead and use the data with a clear conscience! (If
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you feel bad about it, take a smaller deduction for something on your taxes
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next week...)
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The Hershey Fonts:
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- are a set of more than 2000 glyph (symbol) descriptions in vector
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( <x,y> point-to-point ) format
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- can be grouped as almost 20 'occidental' (english, greek,
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cyrillic) fonts, 3 or more 'oriental' (Kanji, Hiragana,
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and Katakana) fonts, and a few hundred miscellaneous
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symbols (mathematical, musical, cartographic, etc etc)
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- are suitable for typographic quality output on a vector device
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(such as a plotter) when used at an appropriate scale.
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- were digitized by Dr. A. V. Hershey while working for the U.S.
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Government National Bureau of Standards (NBS).
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- are in the public domain, with a few caveats:
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- They are available from NTIS (National Technical Info.
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Service) in a computer-readable from which is *not*
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in the public domain. This format is described in
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a hardcopy publication "Tables of Coordinates for
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Hershey's Repertory of Occidental Type Fonts and
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Graphic Symbols" available from NTIS for less than
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$20 US (phone number +1 703 487 4763).
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- NTIS does not care about and doesn't want to know about
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what happens to Hershey Font data that is not
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distributed in their exact format.
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- This distribution is not in the NTIS format, and thus is
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only subject to the simple restriction described
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at the top of this file.
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Hard Copy samples of the Hershey Fonts are best obtained by purchasing the
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book described above from NTIS. It contains a sample of all of the Occidental
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symbols (but none of the Oriental symbols).
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This distribution:
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- contains
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* a complete copy of the Font data using the original
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glyph-numbering sequence
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* a set of translation tables that could be used to generate
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ASCII-sequence fonts in various typestyles
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* a couple of sample programs in C and Fortran that are
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capable of parsing the font data and displaying it
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on a graphic device (we recommend that if you
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wish to write programs using the fonts, you should
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hack up one of these until it works on your system)
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- consists of the following files...
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hershey.doc - details of the font data format, typestyles and
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symbols included, etc.
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hersh.oc[1-4] - The Occidental font data (these files can
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be catenated into one large database)
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hersh.or[1-4] - The Oriental font data (likewise here)
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*.hmp - Occidental font map files. Each file is a translation
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table from Hershey glyph numbers to ASCII
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sequence for a particular typestyle.
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hershey.f77 - A fortran program that reads and displays all
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of the glyphs in a Hershey font file.
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hershey.c - The same, in C, using GKS, for MS-DOS and the
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PC-Color Graphics Adaptor.
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Additional Work To Be Done (volunteers welcome!):
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- Integrate this complete set of data with the hershey font typesetting
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program recently distributed to mod.sources
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- Come up with an integrated data structure and supporting routines
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that make use of the ASCII translation tables
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- Digitize additional characters for the few places where non-ideal
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symbol substitutions were made in the ASCII translation tables.
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- Make a version of the demo program (hershey.c or hershey.f77) that
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uses the standard Un*x plot routines.
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- Write a banner-style program using Hershey Fonts for input and
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non-graphic terminals or printers for output.
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- Anything else you'd like!
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This file provides a brief description of the contents of the Occidental
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Hershey Font Files. For a complete listing of the fonts in hard copy, order
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NBS Special Publication 424, "A contribution to computer typesetting
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techniques: Tables of Coordinates for Hershey's Repertory of Occidental
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Type Fonts and Graphic Symbols". You can get it from NTIS (phone number is
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+1 703 487 4763) for less than twenty dollars US.
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Basic Glyph (symbol) data:
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hersh.oc1 - numbers 1 to 1199
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hersh.oc2 - numbers 1200 to 2499
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hersh.oc3 - numbers 2500 to 3199
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hersh.oc4 - numbers 3200 to 3999
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These four files contain approximately 19 different fonts in
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the A-Z alphabet plus greek and cyrillic, along with hundreds of special
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symbols, described generically below.
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There are also four files of Oriental fonts (hersh.or[1-4]). These
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files contain symbols from three Japanese alphabets (Kanji, Hiragana, and
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Katakana). It is unknown what other symbols may be contained therein, nor
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is it known what order the symbols are in (I don't know Japanese!).
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Back to the Occidental files:
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Fonts:
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Roman: Plain, Simplex, Duplex, Complex Small, Complex, Triplex
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Italic: Complex Small, Complex, Triplex
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Script: Simplex, Complex
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Gothic: German, English, Italian
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Greek: Plain, Simplex, Complex Small, Complex
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Cyrillic: Complex
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Symbols:
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Mathematical (227-229,232,727-779,732,737-740,1227-1270,2227-2270,
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1294-1412,2294-2295,2401-2412)
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Daggers (for footnotes, etc) (1276-1279, 2276-2279)
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Astronomical (1281-1293,2281-2293)
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Astrological (2301-2312)
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Musical (2317-2382)
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Typesetting (ffl,fl,fi sorts of things) (miscellaneous places)
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Miscellaneous (mostly in 741-909, but also elsewhere):
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- Playing card suits
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- Meteorology
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- Graphics (lines, curves)
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- Electrical
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- Geometric (shapes)
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- Cartographic
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- Naval
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- Agricultural
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- Highways
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- Etc...
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ASCII sequence translation files:
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The Hershey glyphs, while in a particular order, are not in an
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ASCII sequence. I have provided translation files that give the
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sequence of glyph numbers that will most closely approximate the
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ASCII printing sequence (from space through ~, with the degree
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circle tacked on at the end) for each of the above fonts:
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File names are made up of fffffftt.hmp,
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where ffffff is the font style, one of:
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roman Roman
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greek Greek
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italic Italic
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script Script
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cyril Cyrillic (some characters not placed in
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the ASCII sequence)
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gothgr Gothic German
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gothgb Gothic English
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gothit Gothic Italian
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and tt is the font type, one of:
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p Plain (very small, no lower case)
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s Simplex (plain, normal size, no serifs)
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d Duplex (normal size, no serifs, doubled lines)
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c Complex (normal size, serifs, doubled lines)
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t Triplex (normal size, serifs, tripled lines)
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cs Complex Small (Complex, smaller than normal size)
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The three sizes are coded with particular base line (bottom of a capital
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letter) and cap line (top of a capital letter) values for 'y':
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Size Base Line Cap Line
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Very Small -5 +4
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Small -6 +7
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Normal -9 +12
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(Note: some glyphs in the 'Very Small' fonts are actually 'Small')
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The top line and bottom line, which are normally used to define vertical
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spacing, are not given. Maybe somebody can determine appropriate
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values for these!
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The left line and right line, which are used to define horizontal spacing,
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are provided with each character in the database.
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Format of Hershey glyphs:
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5 bytes - glyphnumber
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3 bytes - length of data length in 16-bit words including left&right numbers
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1 byte - x value of left margin
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1 byte - x value of right margin
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(length*2)-2 bytes - stroke data
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left&right margins and stroke data are biased by the value of the letter 'R'
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Subtract the letter 'R' to get the data.
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e.g. if the data byte is 'R', the data is 0
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if the data byte is 'T', the data is +2
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if the data byte is 'J', the data is -8
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and so on...
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The coordinate system is x-y, with the origin (0,0) in the center of the
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glyph. X increases to the right and y increases *down*.
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The stroke data is pairs of bytes, one byte for x followed by one byte for y.
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An 'R' in the stroke data indicates a 'lift pen and move' instruction.
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</pre>
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<hr>
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<p>
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<small>Public Domain.</small>
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<small>Distributed with Ghostscript 6.50, November 2000</small>
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