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turns out you can have multiple OpenGL contexts in the same window, with wildly different OpenGL versions, and they can all output frames. neat!
https://gist.github.com/hikari-no-yume/9ed05e64c8b967a4b0a1315368139942
@hikari that's surprising and impressive
@hikari I wonder what client software created the pressure to make this actually work in production? I assume vendors wouldn't go to the trifle to make this work unless major software depended on it.
My first guess would be browsers with plugins doing rendering inside? But GPU accelerated browsers are relatively recent.
Or maybe games where the GUI is drawn by an off the shelf middleware that doesn't use the same GL context as the main game renderer? I believe those go back further.
@0x2ba22e11 I suspect that the OS UI is drawn on some systems using OpenGL, so if the app also has its own 3D rendering going on, you’ll have at least two contexts
@hikari oh yes, that was a thing on MacOS in the early 00s and the rest of the world a while later