required_tables

Font contains all required tables?

required_tables

• Applies to: TTF
• Fontspector can hotfix?: no
• Fontspector can fix sources?: no

Rationale

According to the OpenType spec https://docs.microsoft.com/en-us/typography/opentype/spec/otff#required-tables

Whether TrueType or CFF outlines are used in an OpenType font, the following tables are required for the font to function correctly:

• cmap (Character to glyph mapping)⏎
• head (Font header)⏎
• hhea (Horizontal header)⏎
• hmtx (Horizontal metrics)⏎
• maxp (Maximum profile)⏎
• name (Naming table)⏎
• OS/2 (OS/2 and Windows specific metrics)⏎
• post (PostScript information)

The spec also documents that variable fonts require the following table:

• STAT (Style attributes)

Depending on the typeface and coverage of a font, certain tables are recommended for optimum quality.

For example:⏎

• the performance of a non-linear font is improved if the VDMX, LTSH, and hdmx tables are present.⏎
• Non-monospaced Latin fonts should have a kern table.⏎
• A gasp table is necessary if a designer wants to influence the sizes at which grayscaling is used under Windows. Etc.

Proposal

• https://github.com/fonttools/fontbakery/issues/4829

Profiles

• universal (in section 'Universal Profile Checks')

• googlefonts (in section 'Universal Profile Checks')