WebXR Layers support

[NathanaelA]

Is your feature request related to a problem? Please describe. The wolvic browser is missing some of the functionality of the WebXR spec, in this case: https://developer.mozilla.org/en-US/docs/Web/API/XRWebGLBinding shows that Firefox does not yet support this ability. Since Wolvic uses GeckoView, I assume Wolvic then has the same lack of good WebXR support as Firefox does. i.e. that the "Layers" functionality is not available.

Trying to use it reports this: Web Content: [JavaScript Error: "NotSupportedError: A required feature for the XRSession is not available."]

Describe the solution you'd like I need access to the XRControllers as a Gamepad, taking full control of them, eliminating the default "mouse" emulation behavior they default to.

The primary issue is that what I am doing is I have a 2D canvas that is refreshed every frame [see site like at bottom]. The current solution that I use on the default Oculus browser to try and eliminate as much CPU/GPU drain is to:

• Enter immersive-vr mode, this gives me gamepad access I need.
• Create a QuadLayer and copy my canvas via it every frame. This is much more CPU/GPU friendly and it looks massively nicer than copying the texture from Canvas to a texture to be mapped onto a cube.
• Ultimately the best solution would be to allow me to use the controllers as gamepads while the 2d canvas is in full screen mode, but that isn't in the WebXR spec so I'll generate another Feature request for how it could be implemented.

Describe alternatives you've considered There is no good alternative, because an immersive-vr session is currently the only way to get access to the gamepad data on the XR controllers which I need, and QuadLayer is the only way to be CPU/GPU friendly and look reasonably nice.

Additional context This is the solution that I created, which works on the Oculus Browser, because of needing the XRController gamepad issue. This is for my site https://vr.gamers.center -- I decided to test the Wolvic browser because it is used by several other VR devices to see if I could make it compatible and at this point I don't have a good solution to supporting my site on anything but the Oculus browser due to this missing WebXR support.

[svillar]

XRLayers are not supported by Gecko. Hopefully we could support them with the future chromium backend

[NathanaelA]

@svillar - Thanks for confirming my tests... Is there a estimated time line for the Chromium backend, because yes, Chromium does support it [The Oculus browser is Chromium based]....

[svillar]

@svillar - Thanks for confirming my tests... Is there a estimated time line for the Chromium backend, because yes, Chromium does support it [The Oculus browser is Chromium based]....

At some point during Q4 I think