GPOSE

GPOS Editor: Client-based web tool to edit position data to establish a reference for font engineers

Live

https://mattmatic.github.io/GPOSE

Concept

This tool provides a consistent method for evaluating a font against a large word list.

A "Font Force Field" JSON file specifies how near and far each glyph is allowed to be. This tool sifts the words into several 'bins' to allow a linguist to move the individual glyphs into the correct place.

Pattern matching algorithms make bulk search-and-replace very simple.

The end result is a large JSON file that specifies which glyphs should move and by how much.

This work flow is significantly faster than finding an error, engineering the change into the font, and then testing and refining the font... change... by... change. This approach allows a very fast way of defining how the words should be rendered.

Further work

The JSON GPOSE file can be used as a human reference.

However, the goal is to use automated algorithms to distil the GPOSE file into GPOS contextual substitution rules that can be emitted as a .fea for inclusion in the font build.

Help

• Placement scatter: plot one glyph's placement across a list, grouped by context, to find outliers.