# VkPhysicalDeviceMaintenance4Features(3) Manual Page

## Name

VkPhysicalDeviceMaintenance4Features - Structure describing whether the implementation supports maintenance4 functionality

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## C Specification

The `VkPhysicalDeviceMaintenance4Features` structure is defined as:

    // Provided by VK_VERSION_1_3
    typedef struct VkPhysicalDeviceMaintenance4Features {
        VkStructureType    sType;
        void*              pNext;
        VkBool32           maintenance4;
    } VkPhysicalDeviceMaintenance4Features;

or the equivalent

    // Provided by VK_KHR_maintenance4
    typedef VkPhysicalDeviceMaintenance4Features VkPhysicalDeviceMaintenance4FeaturesKHR;

## 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.

## Description

- `maintenance4` indicates that the implementation supports the following:

  - The application may destroy a VkPipelineLayout object immediately after using it to create another object.

  - `LocalSizeId` can be used as an alternative to `LocalSize` to specify the local workgroup size with specialization constants.

  - Images created with identical creation parameters will always have the same alignment requirements.

  - The size memory requirement of a buffer or image is never greater than that of another buffer or image created with a greater or equal size.

  - Push constants do not have to be initialized before they are dynamically accessed.

  - The interface matching rules allow a larger output vector to match with a smaller input vector, with additional values being discarded.

If the `VkPhysicalDeviceMaintenance4Features` 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 `VkPhysicalDeviceMaintenance4Features`, 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-VkPhysicalDeviceMaintenance4Features-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_MAINTENANCE_4_FEATURES`

## See Also

VK_KHR_maintenance4, VK_VERSION_1_3, 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