VK_EXT_external_memory_acquire_unmodified

Other Extension Metadata

Last Modified Date

2023-03-09

Contributors

• Lina Versace, Google
• Chia-I Wu, Google
• James Jones, NVIDIA
• Yiwei Zhang, Google

Description

A memory barrier may have a performance penalty when acquiring ownership of a subresource range from an external queue family. This extension provides API that may reduce the performance penalty if ownership of the subresource range was previously released to the external queue family and if the resource’s memory has remained unmodified between the release and acquire operations.

New Structures

• Extending VkBufferMemoryBarrier, VkBufferMemoryBarrier2, VkImageMemoryBarrier, VkImageMemoryBarrier2:
  • VkExternalMemoryAcquireUnmodifiedEXT

New Enum Constants

• VK_EXT_EXTERNAL_MEMORY_ACQUIRE_UNMODIFIED_EXTENSION_NAME
• VK_EXT_EXTERNAL_MEMORY_ACQUIRE_UNMODIFIED_SPEC_VERSION
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_EXTERNAL_MEMORY_ACQUIRE_UNMODIFIED_EXT

Version History

• Revision 1, 2023-03-09 (Lina Versace)
  • Initial revision