For color fonts, make GID 1 the .null glyph

[madig]

Seems to be a required quirk in Windows, see djrrb/Bungee#53.

[anthrotype]

it doesn't have to be the legacy .null glyph , it just needs to be empty. nanoemoji would put the space at gid1.
gftools even has a fixer script that reorders the glyphs such that gid1 is an empty glyph.
People can already define their public.glyphOrder as they please so I don't think ufo2ft needs to do anything.

[anthrotype]

also see googlefonts/gftools#609 and MicrosoftDocs/typography-issues#346

[khaledhosny]

GlyphsApp always makes space glyph id 1 (unless you really really ask it not to), may be we should do the same by default for all fonts.

[anthrotype]

ok.. PR?

[anthrotype]

@khaledhosny so this fixes it for DS+ufo projects that don't explicitly set their public.glyphOrder. But a lot of inputs to ufo2ft are actually DS+ufos that are in turn generated from glyphsLib, and the latter always sets a public.glyphOrder, and AFAIK it doesn't do anything special for 'space'. I suppose it should?

[khaledhosny]

Yes, I’ll do the equivalent of this change in glyphsLib shortly.