mongfontbuilder 0.5.0

Mongolian Font Builder.

Mongolian Font Builder

The Mongolian Font Builder project consists of:

• Documentation and data files that clarify the encoding and shaping rules required for a font to be compatible with the Unicode Standard and China’s national standard GB/T 25914-2023.
  • Stabilized versions of the documentation will be published as revisions of UTN #57, Encoding and Shaping of the Mongolian Script (the Mongolian UTN).
• Tooling, as a Python package mongfontbuilder, that helps font designers and developers produce a standard-compatible Mongolian script font, as clarified by the documentation.
  • It also acts the reference implementation of the Mongolian UTN.
• Tests for validating fonts produced by the tooling.

Documentation and data files

The documentation is maintained in web/docs/ and deployed to mongolian-utn.pages.dev. For contribution guidelines, refer to CONTRIBUTING.md.

The source-of-truth data files are maintained as TypeScript files in data/. They’re exported to JSON in lib/mongfontbuilder/data/ for consumption of the Python API.

Tooling

The Python package mongfontbuilder is maintained in lib/ and published to PyPI. To install the package in terminal:

pip install mongfontbuilder

This package includes various utilities, including:

• Python API for the data files.
• Dynamic generation of OpenType Layout rules.
• Construction of a complete font from a minimal glyph set.

Tests

Maintained in tests/.

Currently the following EAC test cases are expected to fail:

• eac-hud > XIM11-46
  • The EAC spec expects an invalid FVS after a letter to prevent the MVS shaping step. The UTN model disagrees.
• eac-hud > XIM11-47
• eac-hud > XIM11-48
• eac-hud > XIM11-49
  • The current test font does not include the glyphs one, two, three, and alatin.
• eac-hud > XIM11-1012
  • When an FVS after a letter prevents the MVS shaping step, the MVS is treated as an NBSP. In this case, the FVS remains valid. The UTN model considers this test case incorrect.