VK_NV_descriptor_pool_overallocation

Other Extension Metadata

Last Modified Date

2023-08-30

Contributors

• Jeff Bolz, NVIDIA

Description

There are scenarios where the application does not know ahead of time how many descriptor sets it may need to allocate from a descriptor pool, or how many descriptors of any of the descriptor types it may need to allocate from the descriptor pool.

This extension gives applications the ability to request the implementation allow more sets or descriptors to be allocated than initially specified at descriptor pool creation time, subject to available resources.

The VK_DESCRIPTOR_POOL_CREATE_ALLOW_OVERALLOCATION_SETS_BIT_NV flag lets the application allocate more than VkDescriptorPoolCreateInfo::maxSets descriptor sets, and the VK_DESCRIPTOR_POOL_CREATE_ALLOW_OVERALLOCATION_POOLS_BIT_NV lets the application allocate more descriptors than initially specified by VkDescriptorPoolSize::descriptorCount for any descriptor types.

New Structures

• Extending VkPhysicalDeviceFeatures2, VkDeviceCreateInfo:
  • VkPhysicalDeviceDescriptorPoolOverallocationFeaturesNV

New Enum Constants

• VK_NV_DESCRIPTOR_POOL_OVERALLOCATION_EXTENSION_NAME
• VK_NV_DESCRIPTOR_POOL_OVERALLOCATION_SPEC_VERSION
• Extending VkDescriptorPoolCreateFlagBits:
  • VK_DESCRIPTOR_POOL_CREATE_ALLOW_OVERALLOCATION_POOLS_BIT_NV
  • VK_DESCRIPTOR_POOL_CREATE_ALLOW_OVERALLOCATION_SETS_BIT_NV
• Extending VkStructureType:
  • VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_DESCRIPTOR_POOL_OVERALLOCATION_FEATURES_NV

Version History

• Revision 1, 2023-08-30 (Piers Daniell)
  • Internal revisions