xlib and xcb graphics bindings contain several unused fields by every compatible openxr runtime (Monado and SteamVR)

[technobaboo]

XrGraphicsBindingOpenGLXlibKHR and XrGraphicsBindingOpenGLXcbKHR contain the visualid and fbconfig fields, but they are unused in Monado and SteamVR, the only runtimes that are able to use these graphics bindings.

This will probably lead to inconsistent behavior as more runtimes and time goes on, as seen with issues such as wayland client UI toolkits not supporting multiple seats even when the spec allows for it because it was never used in practice, so enforcement or deprecation might be nice.

[rpavlik-bot]

An issue (number 2174) has been filed to correspond to this issue in the internal Khronos GitLab (Khronos members only: KHR:openxr/openxr#2174 ), to facilitate working group processes.

This GitHub issue will continue to be the main site of discussion.