The Linux graphics stack in a nutshell, part 1

• gamescope

  56 2,652 9.7 C++

  SteamOS session compositing window manager

  

I think your information is quite outdated. The HWC overlay planes are heavily used, you can see this trivially just doing a 'dumpsys SurfaceFlinger' or grabbing a systrace/perfetto trace. When it falls back to GPU composition it's very obvious as there's a significant hit to latency and more GPU contention.

The overlay capabilities of the modern Snapdragons are also quite absurd. They support like upwards of a dozen overlays now and even have FP16 extended sRGB support. Some HWCs (like the one in the steam deck) even have per plane 3D LUTs for HDR tone mapping (ex https://github.com/ValveSoftware/gamescope/blob/master/src/d... )

The composition is bandwidth heavy of course, but for static scenes there's a cache after the HWC in the form of panel self refresh.

• slint

  138 15,020 9.9 Rust

  Slint is a declarative GUI toolkit to build native user interfaces for Rust, C++, or JavaScript apps.

  

You can do that with Slint (https://slint.dev) and its linuxkms backend. No need for a xorg server or wayland compositor, just run the application made with Slint from the init script.

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• cage

  49 965 7.6 C

  A Wayland kiosk

  

That did help me find https://github.com/cage-kiosk/cage/wiki initially I'm here there's other going down that path. Thanks

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