# VkMicromapVersionInfoEXT(3) Manual Page

## Name

VkMicromapVersionInfoEXT - Micromap version information

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## C Specification

The `VkMicromapVersionInfoEXT` structure is defined as:

    // Provided by VK_EXT_opacity_micromap
    typedef struct VkMicromapVersionInfoEXT {
        VkStructureType    sType;
        const void*        pNext;
        const uint8_t*     pVersionData;
    } VkMicromapVersionInfoEXT;

## Members

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

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

- `pVersionData` is a pointer to the version header of a micromap as defined in vkCmdCopyMicromapToMemoryEXT

## Description

Note | `pVersionData` is a pointer to an array of 2×`VK_UUID_SIZE` `uint8_t` values instead of two `VK_UUID_SIZE` arrays as the expected use case for this member is to be pointed at the header of a previously serialized micromap (via vkCmdCopyMicromapToMemoryEXT or vkCopyMicromapToMemoryEXT) that is loaded in memory. Using arrays would necessitate extra memory copies of the UUIDs.

Valid Usage (Implicit)

- VUID-VkMicromapVersionInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_MICROMAP_VERSION_INFO_EXT`

- VUID-VkMicromapVersionInfoEXT-pNext-pNext
  `pNext` must be `NULL`

- VUID-VkMicromapVersionInfoEXT-pVersionData-parameter
  `pVersionData` must be a valid pointer to an array of 2×VK_UUID_SIZE `uint8_t` values

## See Also

VK_EXT_opacity_micromap, VkStructureType, vkGetDeviceMicromapCompatibilityEXT

## 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