# vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(3) Manual Page

## Name

vkGetPhysicalDeviceCalibrateableTimeDomainsEXT - Query calibrateable time domains

## C Specification

To query the set of time domains for which a physical device supports timestamp calibration, call:

    VkResult vkGetPhysicalDeviceCalibrateableTimeDomainsEXT(
        VkPhysicalDevice                            physicalDevice,
        uint32_t*                                   pTimeDomainCount,
        VkTimeDomainEXT*                            pTimeDomains);

## Parameters

- `physicalDevice` is the physical device from which to query the set of calibrateable time domains.

- `pTimeDomainCount` is a pointer to an integer related to the number of calibrateable time domains available or queried, as described below.

- `pTimeDomains` is either `NULL` or a pointer to an array of VkTimeDomainEXT values, indicating the supported calibrateable time domains.

## Description

If `pTimeDomains` is `NULL`, then the number of calibrateable time domains supported for the given `physicalDevice` is returned in `pTimeDomainCount`. Otherwise, `pTimeDomainCount` must point to a variable set by the user to the number of elements in the `pTimeDomains` array, and on return the variable is overwritten with the number of values actually written to `pTimeDomains`. If the value of `pTimeDomainCount` is less than the number of calibrateable time domains supported, at most `pTimeDomainCount` values will be written to `pTimeDomains`. If `pTimeDomainCount` is smaller than the number of calibrateable time domains supported for the given `physicalDevice`, `VK_INCOMPLETE` will be returned instead of `VK_SUCCESS` to indicate that not all the available values were returned.

Valid Usage (Implicit)

- `physicalDevice` must be a valid VkPhysicalDevice handle

- `pTimeDomainCount` must be a valid pointer to a `uint32_t` value

- If the value referenced by `pTimeDomainCount` is not `0`, and `pTimeDomains` is not `NULL`, `pTimeDomains` must be a valid pointer to an array of `pTimeDomainCount` VkTimeDomainEXT values

Return Codes

On success, this command returns

  - `VK_SUCCESS`

  - `VK_INCOMPLETE`

On failure, this command returns

  - `VK_ERROR_OUT_OF_HOST_MEMORY`

  - `VK_ERROR_OUT_OF_DEVICE_MEMORY`

## See Also

VkPhysicalDevice, VkTimeDomainEXT

## Document Notes

For more information, see the Vulkan Specification

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

## Copyright

Copyright (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.