Decompile TTF to project

Reza · May 16, 2024, 6:14am

Is there any way to decompile ttf or otf font to glyph project? exactly for feature, font info, classes and restore anchors?

SCarewe · May 16, 2024, 8:29am

Not 100%. What do you need this for?

Reza · May 16, 2024, 8:49am

I need all things in font info to use and edit them
And anchor for editing
Not need to edit drawing
Is it possible at all?

SCarewe · May 16, 2024, 8:58am

What font are you trying to edit? Why? Do you have the rights to edit it?

Try and find the source files if it’s an open-source project. Otherwise, to edit metadata, try OTMaster, fonttools or TTX (some coding knowledge required for the latter two).

GeorgSeifert · May 16, 2024, 10:23am

It is possible but usually not 100%. Glyphs can import (some) anchors but not the anchor names (as those are not stored in the binary file). So you can try but, specially with complex OpenType (e.g. contextual lookups) it might needs some cleanup.

Reza · May 16, 2024, 12:05pm

Can this codes role back to glyph code?

and the name of glyphs e.g. uni066E is behDotless-ar
Can I rename all glyphs to default?

GeorgSeifert · May 16, 2024, 12:17pm

Disable the “Keep glyphs name from imported files” in Preferences > User Settings and reopen the file.

Reza · May 16, 2024, 12:44pm

Great
50% solved
Now look at this

Can classes restore to left panel and delete from code?

GeorgSeifert · May 16, 2024, 1:51pm

So you have the original .glyphs file? Why do you like to open the .otf file?
Classes are not stored as is in the .otf. they are used in the lookups in different ways. Extracting them is not obvious.

Reza · May 16, 2024, 2:17pm

I have this file but I want to find a way to edit another OLF file and then add it to my project.
So I think if I can rollback info pannel I can do better.

then this is impossible, yes?
what about anchors? Can mark and mkmk restored to anchors (names are not matters)

FlorianPircher · May 16, 2024, 2:32pm

There is a script that attempts to read anchors back as well as it can:

github.com

simoncozens/fontFeatures/blob/master/bin/otflayout2glyphs.py

#!/usr/bin/env python
import logging
import os
import sys
import re
from argparse import ArgumentParser
from collections import OrderedDict

import fontTools.feaLib.ast as feaast
import glyphsLib
from fontTools.ttLib import TTFont
from glyphsLib.classes import GSAnchor, GSClass, GSFeature, GSFeaturePrefix, Point
from lxml import etree

import fontFeatures
from fontFeatures.feaLib.FontFeatures import add_language_system_statements
from fontFeatures.ttLib import unparse
from fontFeatures.ttLib.GDEFUnparser import GDEFUnparser

LOGLEVEL = os.environ.get("LOGLEVEL", "WARNING").upper()

This file has been truncated. show original

Run the script without arguments for a quick help:

python3 otflayout2glyphs.py

Reza · May 16, 2024, 3:47pm

I download this script and put it in Repositories folder and restart glyph. didnt show any thing. copy the text and run in macro window and show error

Traceback (most recent call last):
File “”, line 10
ModuleNotFoundError: No module named ‘glyphsLib’

can you explain what I need to do?

GeorgSeifert · May 16, 2024, 9:46pm

That script is supposed to run outside of Glyphs using a library called “glyphsLib”. It needs a few adjustments to run inside Glyphs directly.

Decompile TTF to project

Traceback (most recent call last): File “”, line 10 ModuleNotFoundError: No module named ‘glyphsLib’

Traceback (most recent call last):
File “”, line 10
ModuleNotFoundError: No module named ‘glyphsLib’