Libertinus fonts

Libertinus fonts is a fork of the Linux Libertine and Linux Biolinum fonts that started as an OpenType math companion of the Libertine font family. It has grown to a full fork to address some of the bugs in the fonts. Thanks to Frédéric Wang for coming up with the name Libertinus.

Libertinus was forked from the 5.3.0 (2012-07-02) release of Linux Libertine fonts.

The family consists of:

• Libertinus Serif: forked from Linux Libertine.
• Libertinus Sans: forked from Linux Biolinum.
• Libertinus Mono: forked from Linux Libertine Mono.
• Libertinus Math: an OpenType math font for use in OpenType math-capable applications (like LuaTeX, XeTeX or MS Word 2007+).

Libertinus fonts are available under the terms of the Open Font License version 1.1.

A zip file containing the font files can be downloaded from the “Releases” page of the project on GitHub.

Building

To build the fonts, you need GNU Make, FontForge with Python support, and FontTools. The latest versions of FontForge and FontTools are preferred. To load and compare GSUB features you also need the preprocess python module, which can be installed by following the instructions on the web page or, if your system has pip, with the commands:

pip install https://github.com/doconce/preprocess/archive/master.zip

(The version of preprocess registered with PyPi is out of date.)

To build the fonts:

make

To build the PDF samples you need fntsample, and then:

make doc

Contributing

The source files are under the sources subdirectory. The .sfd files are FontForge source font format and should be edited with FontForge. The .fea files are Adobe feature files and should be edited by a plain text editor.

After modifying the SFD files, they should be normalized with:

make normalize

(Make sure to save a copy of the SFD files before running this tool. The simplest way is to commit the SFD files, normalize, check the diffs and verify they are OK, then git commit --amend the changes).

We keep the generated fonts under version control, so the last step is to run make and commit the modified sources and the generated fonts.

Generating the fonts for each commit is preferred, but not absolutely required.