VirGL support on Windows hosts upstreamed?

[emxd]

VirGL support on Windows hosts upstreamed?

[kjliew]

Isn't that wonderful?? 😇 Much of the upstream work was done by Marc-André Lureau. He's on qemu-3dfx YouTube subscribers' list, so he knew very well about this project. VirGL support on Windows host was committed since April 2023.

My initial patches wasn't really doing much to get VirGL on Windows host. What it mostly does is a workaround by rerouting the need of libepoxy/EGL to simply libepoxy/GL and getting rid of libgbm false dependency. Over time, the ecosystem picked up those improvements by themselves, MSYS2/mingw-w64 added EGL support for libepoxy and upstream QEMU decoupled libgbm by improving its libs dependency check.

My patches are still required for VirGL support on macOS host with SDL2 OpenGL backend. It is much simpler than other alternatives that resort to libANGLE/EGL to obtain VirGL support on macOS host. Anyway, with such complexity the later can be considered "more future-proof" as libANGLE/EGL realize OpenGL with Apple Metal while SDL2 OpenGL simply depends on deprecated Apple OpenGL.

Upstreaming libANGLE/EGL is rather involved and has been stalled for quite some time. Where as SDL2 OpenGL, though simple, is at risk of Apple OpenGL deprecation. Well, it's all up to QEMU devs, macOS remains the only platform deprived of VirGL support.

[emxd]

Just tried master and VirGL works. So it is upstream and not just Stefan Weil builds. But I take it that it's not your patches?

[emxd]

I read something about VirGL working on Discord, but I'm quite surprised that the commits were added already back in April. And *yes*, it is wonderful... between this, hyper-v dxgkrnl and the virtio-gpu-win drivers I've got some new things to try out.