C Specification

typedef struct XrEventDataBuffer {
    XrStructureType    type;
    const void*        next;
    uint8_t            varying[4000];
} XrEventDataBuffer;

Members

Parameter Descriptions

  • type is the XrStructureType of this structure.

  • next is NULL or a pointer to the next structure in a structure chain. No such structures are defined in core OpenXR.

  • varying is a fixed sized output buffer big enough to hold returned data elements for all specified event data types.

Description

The XrEventDataBuffer is a structure passed to xrPollEvent large enough to contain any returned event data element. The maximum size is specified by XR_MAX_EVENT_DATA_SIZE.

An application can set (or reset) only the type member and clear the next member of an XrEventDataBuffer before passing it as an input to xrPollEvent. The runtime must ignore the contents of the varying field and overwrite it without reading it.

A pointer to an XrEventDataBuffer may be type-cast to an XrEventDataBaseHeader pointer, or a pointer to any other appropriate event data based on the type parameter.

Valid Usage (Implicit)

See Also

XrEventDataBaseHeader, XrStructureType, xrPollEvent

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.