fonts/kobo-font-fix
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Nico Verbruggen
2026-03-14 16:37:47 +01:00
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kobofix.py
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""" """
Font processing utility for Kobo e-readers. Font processing utility for Kobo e-readers.
This script processes TrueType fonts to improve compatibility with Processes TrueType fonts to improve compatibility with Kobo e-readers:
Kobo e-readers by: - Renaming fonts with a configurable prefix and updating internal metadata
- Adding a custom prefix to font names (name table, CFF, post table, PS name)
- Updating the font name if necessary, including PS name - Validating and correcting PANOSE metadata based on font style
- Extracting GPOS kerning data and creating legacy 'kern' tables - Updating font weight metadata (OS/2 usWeightClass)
- Validating and correcting PANOSE metadata - Adjusting line spacing via font-line
- Adjusting font metrics for better line spacing - Kerning: extracting GPOS pairs (Format 1, Format 2, and Extension lookups)
- Updating font weight metadata (OS/2 usWeightClass and PostScript weight string) into a legacy kern table, prioritized by Unicode range to fit within
format 0 size constraints
- Hinting: optionally stripping hints or applying ttfautohint
Includes NV and KF presets for common workflows, or can be fully
configured via individual flags. Run with -h for usage details.
Requirements: Requirements:
- fontTools (pip install fonttools) - fontTools (pip install fonttools)
- font-line utility (https://github.com/source-foundry/font-line) - font-line (pip install font-line)
- ttfautohint (optional, for --hint additive/overwrite)
""" """
import sys import sys