-
Notifications
You must be signed in to change notification settings - Fork 16
mandatory_glyphs
- Applies to: TTF
- Fontspector can hotfix?: no
- Fontspector can fix sources?: no
The OpenType specification v1.8.2 recommends that the first glyph is the '.notdef' glyph without a codepoint assigned and with a drawing:
The .notdef glyph is very important for providing the user feedback that a glyph is not found in the font. This glyph should not be left without an outline as the user will only see what looks like a space if a glyph is missing and not be aware of the active font’s limitation.
https://docs.microsoft.com/en-us/typography/opentype/spec/recom#glyph-0-the-notdef-glyph
Pre-v1.8, it was recommended that fonts should also contain 'space', 'CR' and '.null' glyphs. This might have been relevant for MacOS 9 applications.
-
universal (in section 'Universal Profile Checks')
-
googlefonts (in section 'Universal Profile Checks')