Added a new frame submission API which supports flexible layer lists and only requires a single fence for singaling frame completion.
Added a new layer API which supports the following layer types: Projection, Cylinder, Cube, and Equirect.
Added a new performance API for specifying clock levels, application performance threads, and extra latency mode setting.
Added a new tracking transform API which allows the application to specify the space that tracked poses are reported in, i.e., Floor Level or Eye Level. The default tracking transform is Eye Level.
Head Model Parameters are no longer provided on the API. Since the VrApi runtime is responsible for applying the head model, applications should no longer do so. The new tracking transform API can be used to achieve the desired Floor or Eye Level space.
MinimumVsyncs was renamed to SwapInterval.
Marked vrapi_RecenterInputPose as deprecated.
Removed VRAPI_SYS_STATUS_HEADPHONES_PLUGGED_IN, VRAPI_SYS_UI_GLOBAL_MENU, and VRAPI_SYS_STATUS_THROTTLED2 from API.