OpenXR Specification (Source) 1.1.43

OpenXR Specification 1.1.43 (2024-11-27)

This release has a few clarifications and fixes, as well as several new vendor
extensions.

• Registry
  • Bump version of XR_KHR_vulkan_swapchain_format_list and note that it depends
    on either XR_KHR_vulkan_enable or XR_KHR_vulkan_enable2.
    (internal MR 3418)
  • Fix: Correctly mark XR_FB_touch_controller_pro and
    XR_META_touch_controller_plus as promoted to 1.1.
    (internal MR 3586)
  • Improvement: Small XML formatting/organization cleanups.
    (internal MR 3610)
  • New vendor extension: XR_ML_facial_expression
    (internal MR 3100)
  • New vendor extension: XR_META_passthrough_layer_resumed_event
    (internal MR 3106)
  • New vendor extensions: XR_META_colocation_discovery,
    XR_META_spatial_entity_sharing, and XR_META_spatial_entity_group_sharing
    (internal MR 2782)
  • Reservation: Reserve numbers for spatial extensions.
    (internal MR 3577)
• Specification
  • Clarify: Improve the Input and Semantic Paths chapters by reducing the number
    of undefined or conflated terms used and improving consistency.
    (internal MR 3443)
  • Fix: Correct extension reference in XR_KHR_vulkan_swapchain_format_list and
    clarify "being used" to not just mean "enabled".
    (internal MR 3418)
  • Fix: The parent of an action space is a XrSession.
    (internal MR 3601,
    OpenXR-Docs issue 178,
    internal issue 2395)
  • Improvement: Clarify XR_EXT_future code example for two-call idiom.
    (internal MR 3578)
  • Improvement: Note the changes made when promoting XR_FB_touch_controller_pro
    and XR_META_touch_controller_plus to OpenXR 1.1.
    (internal MR 3586)
  • New vendor extension: XR_META_passthrough_layer_resumed_event allowing
    applications to receive feedback from XR_FB_passthrough
    (internal MR 3106)
  • New vendor extension specification: XR_META_colocation_discovery - allowing
    advertisement and discovery of other devices, physically colocated, running the
    same app.
    (internal MR 2782,
    internal MR 3604,
    internal MR 3605)
  • New vendor extension specification: XR_ML_facial_expression providing access
    to face tracking on supported devices, with a custom subset of blend shapes
    possible.
    (internal MR 3100)
  • New vendor extension specifications: XR_META_spatial_entity_sharing, and
    XR_META_spatial_entity_group_sharing - an updated way to share vendor-
    specific spatial entities.
    (internal MR 2782,
    internal MR 3605)