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VK_EXT_queue_family_foreign.adoc

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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, ename: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 ename:VK_QUEUE_FAMILY_EXTERNAL_KHR, defined in apiext:VK_KHR_external_memory. The key differences between the two are:

  • The queues represented by ename:VK_QUEUE_FAMILY_EXTERNAL_KHR must share the same physical device and the same driver version as the current slink:VkInstance. ename: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 ename:VK_QUEUE_FAMILY_EXTERNAL_KHR. Support for ename:VK_QUEUE_FAMILY_FOREIGN_EXT is more restrictive.

  • Applications should expect transitions to/from ename:VK_QUEUE_FAMILY_FOREIGN_EXT to be more expensive than transitions to/from ename:VK_QUEUE_FAMILY_EXTERNAL_KHR.

Version History

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

    • Squashed internal revisions