VK_KHR_external_semaphore_capabilities(3)

# VK_KHR_external_semaphore_capabilities(3) Manual Page

## Name

VK_KHR_external_semaphore_capabilities - instance extension

## Registered Extension Number

77

## Revision

1

## Ratification Status

Ratified

## Extension and Version Dependencies

VK_KHR_get_physical_device_properties2
or
Vulkan Version 1.1

## Deprecation State

- Promoted to Vulkan 1.1

## Contact

- James Jones [GitHub]cubanismo

## Other Extension Metadata

Last Modified Date

  2016-10-20

IP Status

  No known IP claims.

Contributors

  - Jesse Hall, Google

  - James Jones, NVIDIA

  - Jeff Juliano, NVIDIA

## Description

An application may wish to reference device semaphores in multiple Vulkan logical devices or instances, in multiple processes, and/or in multiple APIs. This extension provides a set of capability queries and handle definitions that allow an application to determine what types of “external” semaphore handles an implementation supports for a given set of use cases.

## Promotion to Vulkan 1.1

All functionality in this extension is included in core Vulkan 1.1, with the KHR suffix omitted. The original type, enum, and command names are still available as aliases of the core functionality.

## New Commands

- vkGetPhysicalDeviceExternalSemaphorePropertiesKHR

## New Structures

- VkExternalSemaphorePropertiesKHR

- VkPhysicalDeviceExternalSemaphoreInfoKHR

- Extending VkPhysicalDeviceProperties2:

  - VkPhysicalDeviceIDPropertiesKHR

## New Enums

- VkExternalSemaphoreFeatureFlagBitsKHR

- VkExternalSemaphoreHandleTypeFlagBitsKHR

## New Bitmasks

- VkExternalSemaphoreFeatureFlagsKHR

- VkExternalSemaphoreHandleTypeFlagsKHR

## New Enum Constants

- `VK_KHR_EXTERNAL_SEMAPHORE_CAPABILITIES_EXTENSION_NAME`

- `VK_KHR_EXTERNAL_SEMAPHORE_CAPABILITIES_SPEC_VERSION`

- VK_LUID_SIZE_KHR

- Extending VkExternalSemaphoreFeatureFlagBits:

  - VK_EXTERNAL_SEMAPHORE_FEATURE_EXPORTABLE_BIT_KHR

  - VK_EXTERNAL_SEMAPHORE_FEATURE_IMPORTABLE_BIT_KHR

- Extending VkExternalSemaphoreHandleTypeFlagBits:

  - VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_D3D12_FENCE_BIT_KHR

  - VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_FD_BIT_KHR

  - VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_BIT_KHR

  - VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_OPAQUE_WIN32_KMT_BIT_KHR

  - VK_EXTERNAL_SEMAPHORE_HANDLE_TYPE_SYNC_FD_BIT_KHR

- Extending VkStructureType:

  - VK_STRUCTURE_TYPE_EXTERNAL_SEMAPHORE_PROPERTIES_KHR

  - VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_EXTERNAL_SEMAPHORE_INFO_KHR

  - VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_ID_PROPERTIES_KHR

## Version History

- Revision 1, 2016-10-20 (James Jones)

  - Initial revision

## See Also

No cross-references are available

## Document Notes

For more information, see the Vulkan Specification.

This page is a generated document. Fixes and changes should be made to the generator scripts, not directly.

## Copyright

Copyright 2014-2026 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0