On X11 I actually have a bunch of patches so I wrote for Qt so I could do painting in another thread. It was useful for a project where I was injecting QtWebKi

On X11 I actually have a bunch of patches so I wrote for Qt so I could do painting in another thread. It was useful for a project where I was injecting QtWebKit into a game where the main thread was the game and the Qt event loop and all its processing had to exists on a different thread sending a single opengl buffer across when rendered. I got some patches into Qt, but others were rejected for one reason or another (could no reproduce, not supported etc), but nonless it was a very cool project.