$Id: README 153 2022-05-27 11:00:14Z pavel $
The home page for the original SIL Gentium font family is
https://scripts.sil.org/Gentium.

The home page for this TeX package, gentium-tug, is https://tug.org/gentium.
Mailing list: gentium@tug.org (https://lists.tug.org/gentium)

This TeX package consists of:

1. The original (unaltered) GentiumPlus and GentiumBookPlus font
families in TrueType format (eight fonts), as developed by SIL and
released under the OFL. See OFL.txt and OFL-FAQ.txt in the directory
GentiumPlus-6.101.

2. Converted fonts in PostScript Type 1 format (the same eight fonts),
released under the same terms. These incorporate the name "Gentium" by
permission of SIL given to the TeX Users Group.

3. LaTeX and other supporting files under the Expat license, whose
text given below (also at https://directory.fsf.org/wiki/License:Expat).

4. Documentation: the TeX-specific documentation is in gentium.{tex,pdf},
also under Expat).  We have also included the original documentation,
fontlogs, and other files from the SIL distributions, entirely
unaltered, in the Gentium*/ subdirectories here.

The contributors are listed in the FONTLOG.txt files.


ENCODINGS:
=========
The package provides font files needed for both Unicode XeTeX and LuaTeX
as well as 8-bit engines such as pdfTeX and TeX (->dvips).

For 8-bit engines the following encodings are available:
- Latin:
  ot1      OT1 - default encoding in TeX
  ec       T1  - for most European languages
  texnansi LY1 - for most Western European languages
  l7x      L7x - for Baltic languages
  qx       QX  - for Polish
  t5       T5  - for Vietnamese
  ts1      TS1 - TeX symbols (for LaTeX)

- Greek:
  lgr      (only supported in LaTeX)

- Cyrillic:
  t2a      T2A
  t2b      T2B
  t2c      T2C
  x2       X2


FILES:
=====
See the FONTLOG for high-level descriptions of what comes from what.

/doc/fonts/gentium-tug
  /GentiumPlus-* - the original SIL documentation, including the OFL
  /gentium-tug   - the TeX-specific documentation
/fonts
  /afm/public/gentium-tug - Adobe Font Metrics
                            (only needed for generating new tfm files)
  /enc/dvips/gentium-tug - encoding files
    gentium-{ts1,agr,lgr}.enc
    gentium-{ot1,ec,texnansi,qx,t5,l7x,t2a,t2b,t2c,x2}{,-sc}.enc
    gentium-{ec,t5}-ttf{,-sc}.enc - to get around a bug in pdfTeX (dcroat & Idotaccent)
  /map
    /dvips/gentium-tug
      gentium-type1.map                           - for TeX and LaTeX
    /pdftex/gentium
      gentium-{ec,texnansi,qx,t5,l7x,agr,t2a}.map - for ConTeXt MkII
      gentium-{ot1,ts1,lgr,t2b,t2c,x2}.map        - (not used anywhere; might be removed)
      gentium-truetype.map                        - for pdfTeX and pdfLaTeX
  /tfm/public/gentium
    {ts1,agr,lgr}-gentium{plus,book}-{regular,italic,bold,bolditalic}.tfm
    {ot1,ec,texnansi,qx,t5,l7x,t2a,t2b,t2c,x2}-gentium{plus,book}-{regular,italic,bold,bolditalic}{,-sc}.tfm
  /truetype/public/gentium-tug - .ttf fonts from SIL
  /type1/public/gentium-tug - .pfb fonts, converted from TrueType by TUG

/source/fonts/gentium-tug
  /lig
    gentium-{agr,lgr,t2a,t2b,t2c,x2}.lig - additional ligatures used to generate tfm files
  /type1                    - scripts for TrueType -> Type1 conversion
    afmcreator.py                - put text "Comment Creator: TeX Users Group" to afm files
    ff-gentium.pe                - FontForge script for conversion to Type 1
    generate-extra-kerns.sh      - main script for creating extra kerning pairs
    greekcorrection.py           - create kerns for accent + capital Greek letter
    kerncorrection.py            - create kerns for Latin and Cyrillic letters
    kern-test-greek.txt          - test file for Greek accents; use it for manual review
                                   in the Metrics Window of FontForge
    kern-word-list-caron.txt     - test file for dcaron and lcaron; for FontForge
    kern-word-list-cyrillic.txt  - test file for Cyrillic letters; for FontForge
    Gentium{Book,}Plus-{Regular,Italic,Bold,BoldItalic}-Czech.kern  - manual kerns for dcaron and lcaron
    Makefile
    README
  ChangeLog
  Makefile
  generate-support-files.rb  - ruby script to generate different files
  gentium.rb                 - ruby library with support classes and functions
  make-zip-4CTAN.sh          - construct distribution
/tex
  /latex/gentium-tug - support files for LaTeX
    gentium.sty
    gentiumbook.sty
    {ot1,t1,ly1,qx,t5,l7x,ts1,lgr,t2a,t2b,t2c,x2}gentium.fd


TODO:
====
- Update the Ruby scripts for current version of Ruby!

- Check that there are no f-ligatures in the encodings X2, LGR
  and possibly AGR.

- Improve kerning for accented Latin letters and for Cyrillic letters.
  More kerning pairs could be added, but not those that can never occur.
  Some manually created kerns could replace the automatically created
  ones.

- Look at the letter Lcaron if the accent should be moved to the left
  (reported to SIL).

- The combination of two commas seems not to give quotedblbase in T1.
  Check it and correct using lig file if needed.
  
- Check if there are new characters to fill the empty slots in encodings.

- The code concerning the final sigma should be cleaned-up (some refactoring;
  how would it be most useful). See commits 24, 142, 143 and mailing list
  thread at:

  https://tug.org/pipermail/gentium/2019q3/thread.html

  Some test file would be usefull.


EXPAT LICENSE:
=============
This file is part of the Gentium package for TeX.
The package contains font files licensed under the SIL Open Font License,
while the rest are under the Expat License.

Copyright (c) 2008-2022 TeX Users Group

Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.