C Specification

The xrEnumerateEnvironmentBlendModes function is defined as:

XrResult xrEnumerateEnvironmentBlendModes(
    XrInstance                                  instance,
    XrSystemId                                  systemId,
    XrViewConfigurationType                     viewConfigurationType,
    uint32_t                                    environmentBlendModeCapacityInput,
    uint32_t*                                   environmentBlendModeCountOutput,
    XrEnvironmentBlendMode*                     environmentBlendModes);


Parameter Descriptions
  • instance is the instance from which systemId was retrieved.

  • systemId is the XrSystemId whose environment blend modes will be enumerated.

  • viewConfigurationType is the XrViewConfigurationType to enumerate.

  • environmentBlendModeCapacityInput is the capacity of the environmentBlendModes array, or 0 to indicate a request to retrieve the required capacity.

  • environmentBlendModeCountOutput is a pointer to the count of environmentBlendModes written, or a pointer to the required capacity in the case that environmentBlendModeCapacityInput is 0.

  • environmentBlendModes is a pointer to an array of XrEnvironmentBlendMode values, but can be NULL if environmentBlendModeCapacityInput is 0.

  • See Buffer Size Parameters chapter for a detailed description of retrieving the required environmentBlendModes size.


Enumerates the set of environment blend modes that this runtime supports for a given view configuration of the system. Environment blend modes should be in order from highest to lowest runtime preference.

Runtimes must always return identical buffer contents from this enumeration for the given systemId and viewConfigurationType for the lifetime of the instance.

Valid Usage (Implicit)
  • instance must be a valid XrInstance handle

  • viewConfigurationType must be a valid XrViewConfigurationType value

  • environmentBlendModeCountOutput must be a pointer to a uint32_t value

  • If environmentBlendModeCapacityInput is not 0, environmentBlendModes must be a pointer to an array of environmentBlendModeCapacityInput XrEnvironmentBlendMode values

Return Codes
On success, this command returns

On failure, this command returns







See Also

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 (c) 2014-2021, The Khronos Group Inc.