Pietro Gagliardi

To narrow it down, does it go away if you remove the `areaFilter()` call in `windows/main.cpp`? If not, then the problem is the event plumbing that happens elsewhere in the...

It seems that the only way to do modern vector graphics with any version of OS/2 — including ArcaOS — is with cairo. Is that correct?

https://visopsys.org/developers/

Oh I forgot about AmigaOS too I couldn't get the 4.1 ISO to boot in WinUAE with the PPC support enabled, and supported computers are stupid expensive, so... No clue...

Also forgot about RISC OS, if I could even figure out how to write C code for it

OpenVMS? It appears I'd be stuck with Motif in that case? QNX with Photon?

Also for the record, the reason I ask about cairo on OS/2 (and allegedly AmigaOS 4.x too? I am incredulous) is because cairo's license conflicts with libui's, so I can't...

NetSurf apparently supports all of these and Atari TOS and maybe a few others to boot; will need to check its code

[PC/GEOS aka Breadbox Ensemble?](https://github.com/bluewaysw/pcgeos) I can't find any documentation so I don't know about the graphical capabilities it gained over time, but I do see the ExtUI has some stuff...

Okay so it is possible to write graphical programs in C++ for Fuchsia: https://fuchsia.googlesource.com/topaz/+/refs/heads/master/examples/ui/paint/paint_view.cc (I think this specific repo is outdated though)