This library provides a bridge from Glyphs source files (.glyphs) to UFOs via RoboFab.

The main methods for conversion are found in glyphslib.py. Intermediate data can be accessed without actually writing UFOs, if needed.

Masters:

master_dir = 'master_ufos'
ufos = glyphslib.build_masters('MyFont.glyphs', master_dir)

Interpolated instances (depends on MutatorMath):

master_dir = 'master_ufos'
instance_dir = 'instance_ufos'
ufos = glyphslib.build_instances('MyFont.glyphs', master_dir, instance_dir)

You must designate a font as italic when calling glyphslib:

glyphslib.build_masters('MyFont-Italic.glyphs', master_dir, italic=True)

ufos = glyphslib.load_to_ufos('MyFont.glyphs')
italic_ufos = glyphslib.load_to_ufos('MyFont-Italic.glyphs', italic=True)

with open('MyFont.glyphs', 'rb') as glyphs_file:
    glyphs_data = glyphslib.load(glyphs_file)

glyphs2ufo tries to be round-trip compatible with Glyphs, though round-trip compatibility is currently impossible in Glyphs with UFOs. Here is a current list of data glyphs2ufo will catch that Glyphs drops/ignores:

• Feature notes and whether a feature is disabled
• Whether a font or glyph component has automatic alignment disabled
• Whether guidelines and components are locked
• Annotations
• Glyph hints
• Glyph timestamps
• Tabs to display when opened

Though this data is loaded into UFOs by glyphs2ufo, it still will not be available if the UFO is opened in Glyphs. It may however be useful if a ufo2glyphs tool is created.

glyphs2ufo will set some additional UFO data that Glyphs does not, including:

• Name table version and unique ID strings
• Postscript names

Glyphs sets a couple of fontinfo.plist values which are not and have never been part of the UFO specification. These values are impossible to load via RoboFab:

• "DisableAllAutomaticBehaviour" (put into lib.plist by glyphs2ufo)
• "description" (stored in "openTypeNameDescription" by glyphs2ufo)
• "vendorID" (stored in "openTypeOS2VendorID" by glyphs2ufo)
• "fsType" (stored in "openTypeOS2Type" by glyphs2ufo)