VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT(3)

# VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT(3) Manual Page

## Name

VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT - Structure describing whether the mutable descriptor type is supported

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## C Specification

The `VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT` structure is defined as:

    // Provided by VK_EXT_mutable_descriptor_type
    typedef struct VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           mutableDescriptorType;
    } VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT;

or the equivalent

    // Provided by VK_VALVE_mutable_descriptor_type
    typedef VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT VkPhysicalDeviceMutableDescriptorTypeFeaturesVALVE;

## Members

This structure describes the following feature:

- `sType` is a VkStructureType value identifying this structure.

- `pNext` is `NULL` or a pointer to a structure extending this structure.

- `mutableDescriptorType` indicates that the implementation must support using the VkDescriptorType of `VK_DESCRIPTOR_TYPE_MUTABLE_EXT` with at least the following descriptor types, where any combination of the types must be supported:

  - `VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE`

  - `VK_DESCRIPTOR_TYPE_STORAGE_IMAGE`

  - `VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER`

  - `VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER`

  - `VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER`

  - `VK_DESCRIPTOR_TYPE_STORAGE_BUFFER`

## Description

- Additionally, `mutableDescriptorType` indicates that:

  - Non-uniform descriptor indexing must be supported if all descriptor types in a VkMutableDescriptorTypeListEXT for `VK_DESCRIPTOR_TYPE_MUTABLE_EXT` have the corresponding non-uniform indexing features enabled in VkPhysicalDeviceDescriptorIndexingFeatures.

  - `VK_DESCRIPTOR_BINDING_UPDATE_AFTER_BIND_BIT` with `descriptorType` of `VK_DESCRIPTOR_TYPE_MUTABLE_EXT` relaxes the list of required descriptor types to the descriptor types which have the corresponding update-after-bind feature enabled in VkPhysicalDeviceDescriptorIndexingFeatures.

  - Dynamically uniform descriptor indexing must be supported if all descriptor types in a VkMutableDescriptorTypeListEXT for `VK_DESCRIPTOR_TYPE_MUTABLE_EXT` have the corresponding dynamic indexing features enabled.

  - `VK_DESCRIPTOR_SET_LAYOUT_CREATE_HOST_ONLY_POOL_BIT_EXT` must be supported.

  - `VK_DESCRIPTOR_POOL_CREATE_HOST_ONLY_BIT_EXT` must be supported.

If the `VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT` structure is included in the `pNext` chain of the VkPhysicalDeviceFeatures2 structure passed to vkGetPhysicalDeviceFeatures2, it is filled in to indicate whether each corresponding feature is supported. If the application wishes to use a VkDevice with any features described by `VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT`, it must add an instance of the structure, with the desired feature members set to `VK_TRUE`, to the `pNext` chain of VkDeviceCreateInfo when creating the VkDevice.

Valid Usage (Implicit)

- VUID-VkPhysicalDeviceMutableDescriptorTypeFeaturesEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MUTABLE_DESCRIPTOR_TYPE_FEATURES_EXT`

## See Also

VK_EXT_mutable_descriptor_type, VK_VALVE_mutable_descriptor_type, VkBool32, VkStructureType

## Document Notes

For more information, see the Vulkan Specification

This page is extracted from the Vulkan Specification. Fixes and changes should be made to the Specification, not directly.

## Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0