Contact
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Mike Blumenkrantz [GitHub]zmike 
Other Extension Metadata
- Last Modified Date
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2025-05-29 
- Interactions and External Dependencies
- Contributors
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Mike Blumenkrantz, Valve 
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Shahbaz Youssefi, Google 
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Hans-Kristian Arntzen, Valve 
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Piers Daniell, NVIDIA 
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Daniel Story, Nintendo 
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Jeff Bolz, NVIDIA 
 
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Description
VK_KHR_maintenance9 adds a collection of minor features, none of which would warrant an entire extension of their own.
The new features are as follows:
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Support VkDevice with no queues. These can be used as effectively an offline compiler to prepopulate pipeline caches, without expensive queue creation or internal memory allocations. 
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Allow vkCmdSetEvent2to not provide a dependency, providingvkCmdSetEvent-style usage using enums fromVK_KHR_synchronization2
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Add a VkQueryPoolCreateFlagBits:: VK_QUERY_POOL_CREATE_RESET_BIT_KHRflag to create a query pool with all queries initialized to the reset state.
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Allow any integer bit width for specific bit-wise operations. 
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Add a property to enable sparse support with VK_EXT_image_2d_view_of_3d.
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Add a property to indicate the implementation will return (0,0,0,0) or (0,0,0,1) to vertex shaders that read unassigned attributes. 
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The effects of image memory barriers and image layout transitions on 3D images created with VK_IMAGE_CREATE_2D_ARRAY_COMPATIBLE_BIT are scoped to the slices specified by the user-provided VkImageSubresourceRange. 
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Queue family ownership transfers are no longer required for buffers and linear images, and a new physical device queue family property is exposed to indicate whether queue family ownership transfers are required for optimal images. 
New Enum Constants
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VK_KHR_MAINTENANCE_9_EXTENSION_NAME
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VK_KHR_MAINTENANCE_9_SPEC_VERSION
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Extending VkDependencyFlagBits: - 
VK_DEPENDENCY_ASYMMETRIC_EVENT_BIT_KHR
 
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Extending VkQueryPoolCreateFlagBits: - 
VK_QUERY_POOL_CREATE_RESET_BIT_KHR
 
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Extending VkStructureType: - 
VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_9_FEATURES_KHR
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VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_9_PROPERTIES_KHR
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VK_STRUCTURE_TYPE_QUEUE_FAMILY_OWNERSHIP_TRANSFER_PROPERTIES_KHR
 
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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.