All-caps Georgian labels are invisible

[1ec5]

When the preferred language is set to Georgian, any layer that contains all-capital letters appears blank, namely, state/provincial labels and boundary edge labels.

English versus Georgian

In practice, the Georgian alphabet is unicameral, but capital letters are used for decorative purposes, such as the reason why we’re uppercasing these labels.

[1ec5]

The capital letters are located in the Georgian Extended block, 0x1C90–0x1CBF. The downloaded Noto Sans Georgian Regular font does contain glyphs for each of these codepoints, but the range 7312–7359 needs to be associated with Georgian so that the generated Americana-Regular font will contain these codepoints:

openstreetmap-americana/scripts/fonts.json

Lines 84 to 87 in e26d76a

	"georgian": [
	[4256, 4351],
	[11520, 11567]
	],

I’ve tried adding this range and doing a clean rebuild, but the uppercase letters still aren’t showing up, even though Americana-Regular.ttf does contain these glyphs.

[1ec5]

This issue doesn’t reproduce in 22615be, which was right before #801 and used the OpenHistorical fontstack:

[ZeLonewolf]

Initial debugging shows that the issue manifests when text-transform: uppercase is used.

[1ec5]

Yes, because the font PBFs don’t contain glyphs for the uppercase letters. If you force the text-field to contain uppercase letters, they don’t show up.

[ZeLonewolf]

Noto Sans Georgian does seem to have the characters:

I'm pulling in the ranges:

[4256, 4351],
[11520, 11567]

Which should correspond to the regular and supplemental Georgian language blocks

[ZeLonewolf]

FontDrop reports Georgian language support and draws Georgian capital letter characters

[ZeLonewolf]

Oh I just saw your note about the missing range.

[1ec5]

Doh, adding the range didn’t work for me locally because the style was pointed to the production glyphs.