// Copyright 2018-2024 The Khronos Group Inc.
//
// SPDX-License-Identifier: CC-BY-4.0

include::{generated}/meta/{refprefix}VK_EXT_calibrated_timestamps.adoc[]

=== Other Extension Metadata

*Last Modified Date*::
    2018-10-04
*IP Status*::
    No known IP claims.
*Contributors*::
  - Matthaeus G. Chajdas, AMD
  - Alan Harrison, AMD
  - Derrick Owens, AMD
  - Daniel Rakos, AMD
  - Faith Ekstrand, Intel
  - Keith Packard, Valve

=== Description

This extension provides an interface to query calibrated timestamps obtained
quasi simultaneously from two time domains.

=== Promotion to `VK_KHR_calibrated_timestamps`

All functionality in this extension is included in
`apiext:VK_KHR_calibrated_timestamps`, with the suffix changed to KHR.
The original enum names are still available as aliases of the KHR
functionality.

include::{generated}/interfaces/VK_EXT_calibrated_timestamps.adoc[]

=== Version History

  * Revision 2, 2021-03-16 (Lionel Landwerlin)
  ** Specify requirement on device timestamps
  * Revision 1, 2018-10-04 (Daniel Rakos)
  ** Internal revisions.