diff options
Diffstat (limited to 'source/luametatex/source/license.txt')
| -rw-r--r-- | source/luametatex/source/license.txt | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/source/luametatex/source/license.txt b/source/luametatex/source/license.txt new file mode 100644 index 000000000..f98c98819 --- /dev/null +++ b/source/luametatex/source/license.txt @@ -0,0 +1,181 @@ +------------------------------------------------------------------------------------------ +PREAMBLE +------------------------------------------------------------------------------------------ + +The LuaMetaTeX program is a light weight variant of LuaTeX. This program finds its origin +in parts of TeX (the original program, eTeX (some extensions), pdfTeX (more extensions) +Aleph (based on Omega, directions) and of course LuaTeX (lots of things). + +So, basically we follow up on LuaTeX which itself is a follow up on TeX, eTeX, pdfTeX and +Aleph. The actual starting point (in 2005) was a special Lua enhanced version of pdfTeX +by Hartmut Henkel that we experimented with and triggered a follow up. However, the code +base is no longer Pascal (which then gets converted to C) but regular C code instead. That +conversion was done by Taco Hoekwater as part of the Oriental TeX project. + +There are many articles (presentations and documents) that discuss the development history. +These articles and documents describing the projects shed more light on what functionality +showed up when and why. As these projects closely relate to ConTeXt development you can +find those documents in the ConTeXt distribution. + +After this conversion quite some implementation details changed over the decade that +followed: memory management was adapted, string handling became dynamic, managing the +table of equivalents was tuned to the mix, callbacks were added. The opening up resulted in +some adaption of the internals too. Font handling changed, math support for opentype math +has been introduced. Hyphenation handling, ligature building and kerning are clearly +separated and language support has been rewritten from scratch. In addition to Lua, the +TeX engine is also complemented by the MetaPost library. Luigi Scarso added support for +LuaJIT and ffi and over time makes sure that the code works out okay in the regular +TeXLive build too. + +In 2018-2019 the conversion from LuaTeX to LuaMetaTeX was done by Hans Hagen as part of +an attempt to simplify the build and get rid of code that might have been useful when we +started but no longer makes sense. Because the LuaTeX interfaces had to stabelize, this +follow up also provides us a new testbed. The LuaMetaTeX source code is distributed as +part of the ConTeXt distribution which is also used for testing and development. Most +tests are done by those involved in ConTeXt development, so issues should be reported to +the mailing lists related to this macro package. + +In the process the code base has been adapted substantially, although the decade of +LuaTeX development already prepared for that. This also leads occasionally instable +setups. We're grateful to ConTeXt community for their patience in testing these continuous +developments. + +The license below is from LuaTeX and also applies to LuaMetaTeX. Although other team +members contribute(d) to the code, we stick to this description. The --credits option +provides more information. + +------------------------------------------------------------------------------------------ +EXCUSE +------------------------------------------------------------------------------------------ + +Although some code comes from pdfTeX and Aleph, the majority comes from good old TeX and +eTeX or is completely new. Original TeX is a well documented program written in WEB and +those building upon it have added comments. In LuaMetaTeX we use plain C files but the +comments are still mostly present. When you read them you really need to keep in mind that +some refer to good old TeX! The nice comments come from Don Knuth, the bad and fuzzy ones +originate at us. We appologize to Don for this. + +------------------------------------------------------------------------------------------ +CREDITS +------------------------------------------------------------------------------------------ + +LuaMetaTeX builds upon the code from LuaTeX which comes from: + + tex : Donald Knuth + etex : Peter Breitenlohner, Phil Taylor and friends + +The expansion and protrusion code is derived from: + + pdftex : Han The Thanh and friends + +Some of the bidirectional text flow model is taken from: + + omega : John Plaice and Yannis Haralambous + aleph : Giuseppe Bilotta + +Graphic support is provided by: + + metapost : John Hobby, Taco Hoekwater, Luigi Scarso, Hans Hagen and friends + +All this is opened up with: + + lua : Roberto Ierusalimschy, Waldemar Celes and Luiz Henrique de Figueiredo + lpeg : Roberto Ierusalimschy + +A few libraries are embedded, of which we mention: + + avl : Richard McGraw (adapted) + decnumber : Mike Cowlishaw (IBM) + libcerf : Joachim Wuttke (adapted to msvc) + md5 : Peter Deutsch (with partial code from pplib libraries) + pplib : Paweł Jackowski (with partial code from libraries) + sha2 : Aaron D. Gifford (with partial code from pplib libraries) + socket : Diego Nehab (partial and adapted) + # zlib : Jean-loup Gailly and Mark Adler + miniz : Rich Geldreich etc. + mimalloc : Daan Leijen (Microsoft Research) + +The code base contains more names and references. Some libraries are partially adapted. We +use an adapted version of the lfs from the Kepler Project. Also, MetaPost used decNumber +for decimal number mode. + +Depending on demand a few optional libraries can be used, for instance curl, imagemagick, +lz4, lzo, mujs, mysql, sqlite and zint but there are no dependencies and only very limited +interfaces are provided (ConTeXt provides \LUA\ layers on top). + +------------------------------------------------------------------------------------------ +TEAM +------------------------------------------------------------------------------------------ + +LuaTeX : Hans Hagen, Hartmut Henkel, Taco Hoekwater, Luigi Scarso +LuaMetaTeX : Hans Hagen, Wolfgang Schuster, Mojca Miklavec, Alan Braslau + +------------------------------------------------------------------------------------------ +MAIN LICENSE (consider it part of each file that refers to this file) +------------------------------------------------------------------------------------------ + +Copyright Taco Hoekwater & Hans Hagen & Wolfgang Schuster + +This file is part of LuaMetaTeX. + +LuaMetaTeX is free software; you can redistribute it and/or modify it under the terms of +the GNU General Public License as published by the Free Software Foundation; either +version 2 of the License, or (at your option) any later version. + +LuaMetaTeX is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; +without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. +See the GNU Lesser General Public License for more details. + +You could have received a copy of the GNU General Public License along with LuaMetaTeX; if +not, see <http://www.gnu.org/licenses/>. + +------------------------------------------------------------------------------------------ +REMARK +------------------------------------------------------------------------------------------ + +The Lua(Meta)TeX team can always decide to relicense to a variant licence in the future, +but please don't start one of these religious licence discussions with us. We like what +we're doing, we permits others to use it, and that is the bottomline. + +------------------------------------------------------------------------------------------ +OTHER LICENSES +------------------------------------------------------------------------------------------ + +The files taken from elsewhere have their own license information at the top of the files +or in a file their path. It's a mixed bag but basically all permit usage and extensions. + +------------------------------------------------------------------------------------------ +BUILD | FARM | REPOSITORIES +------------------------------------------------------------------------------------------ + +Mojca Miklavec, Hans Hagen, Alan Braslau + +------------------------------------------------------------------------------------------ +CONTEXT MKII | MKIV | LMTX +------------------------------------------------------------------------------------------ + +Hans Hagen, Wolfgang Schuster, etc + +------------------------------------------------------------------------------------------ +WEBSITE +------------------------------------------------------------------------------------------ + +http://www.luatex.org +http://contextgarden.net +http://www.pragma-ade.com / http://www.pragma-nl.com + +------------------------------------------------------------------------------------------ +SUPPORT +------------------------------------------------------------------------------------------ + +http://www.ntg.nl/mailman/listinfo/ntg-context +http://www.ntg.nl/mailman/listinfo/dev-context + +------------------------------------------------------------------------------------------ +MORE LINKS +------------------------------------------------------------------------------------------ + +http://www.ntg.nl +http://www.tug.org + +------------------------------------------------------------------------------------------ |