OpenXR

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OpenXR
DeveloperKhronos Group
Stable release
1.1.38 / April 15, 2024; 2 years ago (2024-04-15)[1]
Repositoryregistry.khronos.org/OpenXR/#apispecs
Engine
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    Operating systemCross-platform
    PlatformCross-platform
    TypeVirtual reality and augmented reality API
    LicenseApache License 2.0[2]
    Websitewww.khronos.org/openxr/

    OpenXR is an open-source, royalty-free standard for interfacing with virtual reality and augmented reality devices.[3] It is developed by a working group managed by the Khronos Group consortium. OpenXR was announced by the Khronos Group on February 27, 2017, during GDC 2017.[4][5][6] A provisional version of the standard was released on March 18, 2019, to enable developers and implementers to provide feedback on it.[3] On July 29, 2019, OpenXR 1.0 was released to the public by Khronos Group at SIGGRAPH 2019[7] and on April 15, 2024, OpenXR 1.1 was released by Khronos.[8]

    Reviewers of the 0.90 provisional release considered that the aim of OpenXR was to "Solve AR/VR Fragmentation".[9]

    Architecture

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    The standard provides an API aimed for application developers targeting virtual reality and augmented reality devices. This enables developers to build applications that will work across a wide variety of devices.[10]

    The fundamental elements of this API are:

    • XrSpace: a representation of the 3D space
    • XrInstance: a representation of the OpenXR runtime
    • System and XrSystemId: a representation of the devices, including the virtual reality or augmented reality devices and controllers
    • XrActions: used to handle user inputs
    • XrSession: represents the interaction session between the application and the user

    The full specification can be found via the OpenXR Registry on GitHub.

    Implementations

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    The Khronos Group maintains the list of OpenXR-conformant platforms and products.[11]

    Currently conformant OpenXR platforms are:

    Game and rendering engine support

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    Support for OpenXR application development can be found in the following engines:

    Browser support

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    Roadmap

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    After the release of OpenXR 1.0, progress will likely be driven through the development of extensions to the core API.[34] This can be seen in the subsequent release of extensions for support of hand tracking and eye gaze tracking.[35] As implementers and developers get more experience with the extensions, they could get integrated into the core OpenXR API in future releases.

    Contributors

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    The following companies are listed by Khronos as public supporters of OpenXR:[36]

    See also

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    • OpenVR – Software development kit and application programming interface by Valve
    • WebXR – Experimental JavaScript API for augmented/virtual reality devices

    Proprietary counterparts

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    • ARCore – Software development kit for building augmented reality applications
    • ARKit – Augmented reality API for Apple platforms

    References

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