# VkDescriptorSetAllocateInfo(3) Manual Page

## Name

VkDescriptorSetAllocateInfo - Structure specifying the allocation parameters for descriptor sets

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## C Specification

The `VkDescriptorSetAllocateInfo` structure is defined as:

    // Provided by VK_VERSION_1_0
    typedef struct VkDescriptorSetAllocateInfo {
        VkStructureType                 sType;
        const void*                     pNext;
        VkDescriptorPool                descriptorPool;
        uint32_t                        descriptorSetCount;
        const VkDescriptorSetLayout*    pSetLayouts;
    } VkDescriptorSetAllocateInfo;

## Members

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

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

- `descriptorPool` is the pool which the sets will be allocated from.

- `descriptorSetCount` determines the number of descriptor sets to be allocated from the pool.

- `pSetLayouts` is a pointer to an array of descriptor set layouts, with each member specifying how the corresponding descriptor set is allocated.

## Description

Valid Usage

- VUID-VkDescriptorSetAllocateInfo-apiVersion-07895
  If the VK_KHR_maintenance1 extension is not enabled and VkPhysicalDeviceProperties::`apiVersion` is less than Vulkan 1.1, `descriptorSetCount` must not be greater than the number of sets that are currently available for allocation in `descriptorPool`

- VUID-VkDescriptorSetAllocateInfo-apiVersion-07896
  If the VK_KHR_maintenance1 extension is not enabled and VkPhysicalDeviceProperties::`apiVersion` is less than Vulkan 1.1, `descriptorPool` must have enough free descriptor capacity remaining to allocate the descriptor sets of the specified layouts

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-00308
  Each element of `pSetLayouts` must not have been created with `VK_DESCRIPTOR_SET_LAYOUT_CREATE_PUSH_DESCRIPTOR_BIT` set

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-03044
  If any element of `pSetLayouts` was created with the `VK_DESCRIPTOR_SET_LAYOUT_CREATE_UPDATE_AFTER_BIND_POOL_BIT` bit set, `descriptorPool` must have been created with the `VK_DESCRIPTOR_POOL_CREATE_UPDATE_AFTER_BIND_BIT` flag set

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-09380
  If `pSetLayouts`[i] was created with an element of `pBindingFlags` that includes `VK_DESCRIPTOR_BINDING_VARIABLE_DESCRIPTOR_COUNT_BIT`, and VkDescriptorSetVariableDescriptorCountAllocateInfo is included in the `pNext` chain, and `VkDescriptorSetVariableDescriptorCountAllocateInfo`::`descriptorSetCount` is not zero, then VkDescriptorSetVariableDescriptorCountAllocateInfo::`pDescriptorCounts`[i] must be less than or equal to VkDescriptorSetLayoutBinding::`descriptorCount` for the corresponding binding used to create `pSetLayouts`[i]

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-04610
  If any element of `pSetLayouts` was created with the `VK_DESCRIPTOR_SET_LAYOUT_CREATE_HOST_ONLY_POOL_BIT_EXT` bit set, `descriptorPool` must have been created with the `VK_DESCRIPTOR_POOL_CREATE_HOST_ONLY_BIT_EXT` flag set

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-08009
  Each element of `pSetLayouts` must not have been created with the `VK_DESCRIPTOR_SET_LAYOUT_CREATE_DESCRIPTOR_BUFFER_BIT_EXT` bit set

Valid Usage (Implicit)

- VUID-VkDescriptorSetAllocateInfo-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_DESCRIPTOR_SET_ALLOCATE_INFO`

- VUID-VkDescriptorSetAllocateInfo-pNext-pNext
  `pNext` must be `NULL` or a pointer to a valid instance of VkDescriptorSetVariableDescriptorCountAllocateInfo

- VUID-VkDescriptorSetAllocateInfo-sType-unique
  The `sType` value of each struct in the `pNext` chain must be unique

- VUID-VkDescriptorSetAllocateInfo-descriptorPool-parameter
  `descriptorPool` must be a valid VkDescriptorPool handle

- VUID-VkDescriptorSetAllocateInfo-pSetLayouts-parameter
  `pSetLayouts` must be a valid pointer to an array of `descriptorSetCount` valid VkDescriptorSetLayout handles

- VUID-VkDescriptorSetAllocateInfo-descriptorSetCount-arraylength
  `descriptorSetCount` must be greater than `0`

- VUID-VkDescriptorSetAllocateInfo-commonparent
  Both of `descriptorPool`, and the elements of `pSetLayouts` must have been created, allocated, or retrieved from the same VkDevice

## See Also

VK_VERSION_1_0, VkDescriptorPool, VkDescriptorSetLayout, VkStructureType, vkAllocateDescriptorSets

## 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0