VK_EXT_queue_family_foreign

Other Extension Metadata

Last Modified Date

2017-11-01

IP Status

No known IP claims.

Contributors

• Lina Versace, Google
• James Jones, NVIDIA
• Faith Ekstrand, Intel
• Jesse Hall, Google
• Daniel Rakos, AMD
• Ray Smith, ARM

Description

This extension defines a special queue family, VK_QUEUE_FAMILY_FOREIGN_EXT, which can be used to transfer ownership of resources backed by external memory to foreign, external queues. This is similar to VK_QUEUE_FAMILY_EXTERNAL_KHR, defined in VK_KHR_external_memory. The key differences between the two are:

• The queues represented by VK_QUEUE_FAMILY_EXTERNAL_KHR must share the same physical device and the same driver version as the current VkInstance. VK_QUEUE_FAMILY_FOREIGN_EXT has no such restrictions. It can represent devices and drivers from other vendors, and can even represent non-Vulkan-capable devices.
• All resources backed by external memory support VK_QUEUE_FAMILY_EXTERNAL_KHR. Support for VK_QUEUE_FAMILY_FOREIGN_EXT is more restrictive.
• Applications should expect transitions to/from VK_QUEUE_FAMILY_FOREIGN_EXT to be more expensive than transitions to/from VK_QUEUE_FAMILY_EXTERNAL_KHR.

New Enum Constants

• VK_EXT_QUEUE_FAMILY_FOREIGN_EXTENSION_NAME
• VK_EXT_QUEUE_FAMILY_FOREIGN_SPEC_VERSION
• VK_QUEUE_FAMILY_FOREIGN_EXT

Version History

• Revision 1, 2017-11-01 (Lina Versace)
  • Squashed internal revisions