update for openxr 1.0.20

[kcking]

I took a crack at updating the generator for openxr 1.0.20. A couple things I found relatively general solutions to, and a couple I opted for a quick one-off change. Here's a list of things I changed

• allow lengths that don't end in .
• handle naming collision between XR_SWAPCHAIN_USAGE_INPUT_ATTACHMENT_BIT_{MND,KHR}
• manually import XrViveTrackerPathsHTCX
• handle Action setter parameter which has generic ActionTy, akin to G: Graphics type parameter
• handle BaseHeader setter arguments
• handle _COUNT and _SIZE_FB length suffixes
• add a manual (but trivial) FoveationProfileFB wrapper struct

Let me know if this type of contribution is desirable and if there's anything you'd like to be approached differently!

[kcking]

Thanks, this is very welcome! For ease of review, could you reformat this PR as a series of minimal, atomic commits that each address a single thing?

Thanks for taking a look! I'm getting the commits tidied up and then will respond to your comments

[kcking]

Thank you for the super helpful comments! I believe I followed all of your suggestions.

I made all EventData constructors unsafe as you mentioned. I generated a doc comment to point the user toward the analagous struct in sys which has a pointer to the openxr spec.

Also I added the Session::create_foveation_profile impl in foveation_profile_fb.rs instead of session.rs since it seemed more relevant.

[kcking]

This latest commit should address both issues since they affected the same line :)

[kcking]

Ah I can fix those lints

[Ralith]

Released in 0.15.5.

[kcking]

Released in 0.15.5.

🎉 thank you for all of the help with this!

[zmerp]

The foveation profile bindings seem to be incomplete. You need also bindings for xrUpdateSwapchainFB in XR_FB_swapchain_update_state to be able to apply the foveation profile.