You heard right, wayfire and other wlroots compositors can now run with vulkan or gles renderers on WSLg (Windows Subsystem for Linux GUI)! Before getting too excited, there is a catch.. it runs entirely in software without a render node, on wlroots headless backend. It is viewable with wayvnc (VNC) or wf-ogon plugin (RDP). This is possible with the advent of the udmabuf allocator in wlroots. It is used in conjunction with llvmpipe to render directly into RAM. The udmabuf allocator is new in latest wlroots, so it has yet to be released. However, I have taken the liberty of backporting the code to wlroots 0.18.2. I have uploaded the code to the udmabuf branch on github here. Without any modifications to wayfire GL code, wayfire runs in software. To do this, the WSL kernel must be compiled with `CONFIG_UDMABUF=y`, since this option is not default. This gives us /dev/udmabuf which key for the functionality needed for userspace dynamically allocated buffers. To get this working, latest mesa 25.x.x is required. Build wayfire with the following:

meson setup -Duse_system_wlroots=disabled -Dwlroots:c_std=c11 -Dwlroots:allocators=gbm,udmabuf --prefix=/usr build
ninja -C build
sudo -E ninja -C build install

and run it with

LP_NUM_THREADS=0 WLR_RENDERER_FORCE_SOFTWARE=1 WLR_BACKENDS=headless wayfire

Don’t forget to load wayvnc in [autostart] section to connect with a vnc client or load the wf-ogon plugin and connect with an rdp client. I didn’t actually try this on WSLg, but I helped those that did get it working. So I don’t have a video of my own, but this is from a user that did run it: