[jamesfmilne]

macOS has IOSurface [0], so it can be done there too. It would require someone to implement it for GTK.

[0] https://developer.apple.com/documentation/iosurface

[audidude]

When I wrote the macOS backend and GL renderer I made them use IOSurface already. So it's really a matter of setting up CALayer automatically the same way that we do it on Linux.

I don't really have time for that though, I only wrote the macOS port because I had some extra holiday hacking time.