# VkWriteDescriptorSetInlineUniformBlock(3) Manual Page

## Name

VkWriteDescriptorSetInlineUniformBlock - Structure specifying inline uniform block data

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## C Specification

If the `descriptorType` member of VkWriteDescriptorSet is `VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK` then the data to write to the descriptor set is specified through a `VkWriteDescriptorSetInlineUniformBlock` structure included in the `pNext` chain of `VkWriteDescriptorSet`.

The `VkWriteDescriptorSetInlineUniformBlock` structure is defined as:

    // Provided by VK_VERSION_1_3
    typedef struct VkWriteDescriptorSetInlineUniformBlock {
        VkStructureType    sType;
        const void*        pNext;
        uint32_t           dataSize;
        const void*        pData;
    } VkWriteDescriptorSetInlineUniformBlock;

or the equivalent

    // Provided by VK_EXT_inline_uniform_block
    typedef VkWriteDescriptorSetInlineUniformBlock VkWriteDescriptorSetInlineUniformBlockEXT;

## Members

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

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

- `dataSize` is the number of bytes of inline uniform block data pointed to by `pData`.

- `pData` is a pointer to `dataSize` number of bytes of data to write to the inline uniform block.

## Description

Valid Usage

- VUID-VkWriteDescriptorSetInlineUniformBlock-dataSize-02222
  `dataSize` must be an integer multiple of `4`

Valid Usage (Implicit)

- VUID-VkWriteDescriptorSetInlineUniformBlock-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_WRITE_DESCRIPTOR_SET_INLINE_UNIFORM_BLOCK`

- VUID-VkWriteDescriptorSetInlineUniformBlock-pData-parameter
  `pData` must be a valid pointer to an array of `dataSize` bytes

- VUID-VkWriteDescriptorSetInlineUniformBlock-dataSize-arraylength
  `dataSize` must be greater than `0`

## See Also

VK_EXT_inline_uniform_block, VK_VERSION_1_3, 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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0