Switched from the monochrome emoji font to color: NotoColorEmoji's
embedded CBDT bitmap glyphs, rasterized once at their native 109px
size and scaled to the target row height (unlike normal vector text,
color bitmap glyphs aren't stored at arbitrary sizes). Confirmed by
rendering an actual agenda row through the real quantizer that the
dithered-to-6-color result still reads clearly, not just muddy noise.
Falls back to the monochrome font if a deployment's Pillow/FreeType
wasn't built with embedded color bitmap support, so this degrades
instead of crashing or showing nothing.
The earlier fix stripped emoji instead of rendering them, which wasn't
what was asked for. Event titles now draw with two fonts: the usual
default font for text, and a vendored monochrome emoji font (Noto
Emoji, OFL-1.1) for actual emoji runs, so they show up as real glyphs
instead of a tofu box or nothing at all. Monochrome rather than color,
since reliably rendering COLR/CBDT color glyphs depends on how Pillow's
FreeType was built -- not something to depend on across deployments.
Also: events sharing the exact same title and time across different
calendars (e.g. a shared family event synced onto more than one
person's calendar) now collapse into one row instead of showing twice,
with a color bar split between every contributing calendar so it's
still clear whose event it is.
tfaour