library/maps/label-font.js picks a symbol layer's text-font by engine: Noto Sans
(Regular, or Bold for medium/bold) under MapLibre, which is what OpenFreeMap
serves, and exactly the caller's fonts under Mapbox. Mapbox maps render as
before.
useMapClustering hard-coded 'DIN Offc Pro Medium, Arial Unicode MS Bold', which
OpenFreeMap does not have. Under MapLibre every native cluster count requested
it and got a 404; MapLibre then drew the counts in its fallback weight instead
of the intended bold. It now uses the helper, as do upg-neighbor (replacing its
own copy), prayer-walk-planner, and key-cities' city-name labels, which named no
font and so asked for MapLibre's default (also a 404 on OpenFreeMap).
Measured by importing the real composable in a browser, 3,000 points in native
mode:
- main under MapLibre: 1 glyph 404 (DIN Offc Pro Medium,Arial Unicode MS Bold),
and the counts drawn in the fallback weight;
- this change under MapLibre: 0 glyph 404s, text-font Noto Sans Bold, 22
clusters with counts in bold;
- this change under Mapbox: text-font still exactly DIN Offc Pro Medium /
Arial Unicode MS Bold.
No production map reaches native cluster counts today (Simple Research and
Country Posters force the 'mst' line mode), so this was latent in shared code.
Correction to b1e0c7fa: it said those labels "drew nothing". The screenshots here
show MapLibre falls back and draws them. The defect was the failed glyph request
on every load and the wrong weight, not missing text.
Rebuilt: country-posters, doxa-research-map, upg-neighbor, prayer-walk-planner,
key-cities.
e94cb56b79