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steam_helper: get OpenXR extensions before initializing OpenVR #7906

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steam_helper: get OpenXR extensions before initializing OpenVR #7906

wants to merge 1 commit into from

Commits on Jul 15, 2024

  1. steam_helper: get OpenXR extensions before initializing OpenVR 

    When using OpenComposite, both OpenVR and OpenXR functions will call the same underlying OpenXR loader.

Because the OpenXR loader only supports a single active instance,
`initialize_vr_data` currently fails because an OpenXR instance
has already been initialized when XR extensions are queried.

For SteamVR, the runtime already needs to be running for `xrCreateInstance` to succeed.

To support both setups, this commit tries to query
XR extensions before OpenVR initialization, but still defaults
to the previous behavior if the first try was unsuccessful.

Fix for:
ValveSoftware#7905
    @emily-is-my-username
    emily-is-my-username committed Jul 15, 2024
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