MVT Rendering Support

[marklit]

Feature description

https://maps.gishub.org/maplibre/openstreetmap.html is using https://tiles.versatiles.org/assets/sprites/[email protected] which look blurry when viewed in a normal PNG viewer but they render fine via maplibre.

The sprites:

How they render in maplibre:

In QGIS:

The following was pointed out in #59492 (comment)

For the sprites/icons, I can see a couple of implementation gaps here:

• icons are rendered using the Style reference: document sdf icons mapbox/mapbox-gl-style-spec#97 mode, which
• isn't supported by QGIS (not sure if it can)
• the icon-color property isn't implemented by QGIS yet
• the icon-padding property isn't implemented by QGIS yet
• the icon-opacity property isn't taken into account for some icons (e.g. one way)

Additional context

OSM has begun hosting MVT that are updated in near-realtime.