Add XRView to XRDepthInformation

[cabanier]

/tpac

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[alcooper91]

Spoke offline yesterday and proposed some way to make this not a breaking change, suggested adding a new dictionary member that can be default false and true to indicate that the page is willing to handle this new information.

[cabanier]

This was discussed at TPAC and the consensus was that we should return an XRView instead with the information of the depth texture.

[cabanier]

Addresses #45

[alcooper91]

Overall this approach seems fine; except that I thought we had also discussed a way for the site to opt-in/acknowledge "Yes, I'm willing to handle this optional view" (Which may have been either a method to populate that view or to otherwise acquire it?)

[cabanier]

Overall this approach seems fine; except that I thought we had also discussed a way for the site to opt-in/acknowledge "Yes, I'm willing to handle this optional view" (Which may have been either a method to populate that view or to otherwise acquire it?)

Yes, I didn't add that yet because the power outage stopped our meeting mid-way
I agree that this needs to be an opt-in

[cabanier]

@alcooper91 do you want to address the optionality first before this is merged?

[alcooper91]

Yeah, I'd prefer to land that all at once so we don't have a weird in-between state of the spec.

I won't be able to attend the next meeting, but I'm happy to go along with whatever folks decide if you think we should continue the discussion at that?

[cabanier]

/agenda discuss adding an optional feature that accomodates slower depth refresh rate