fontra-compile — A Variable Font outline compiler for Fontra

This is for now a work in progress proof of concept.

Initial goals:

• Focus on outlines and (variable) components
• Input: Fontra "backend" objects (core and rcjk)
• Initially glyf-1-only
• Variable Components
• Cubics outlines in glyf

Future goals:

• Output regular components when possible
• Add option to convert cubic curves to quadratics
• Add option to convert quadratic curves to cubics
• Add option to flatten variable components
• Add option to build a backwards compatible glyf-0 table

Install

• Clone this repository

• cd into the cloned repository folder

• Create and activate a virtual environment with Python 3.10 or up

• Install dependencies:

  pip install -r requirements.txt

• Install this package:

  pip install -e .

Usage

$ fontra-compile source.designspace out.ttf
$ fontra-compile source.designspace out.ttf --glyph-names A,B,C
$ fontra-compile source.rcjk out.ttf
$ fontra-compile source.otf out.ttf
$ fontra-compile source.ttf out.ttf