# VkCopyAccelerationStructureToMemoryInfoKHR(3) Manual Page

## Name

VkCopyAccelerationStructureToMemoryInfoKHR - Parameters for serializing an acceleration structure

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## C Specification

    // Provided by VK_KHR_acceleration_structure
    typedef struct VkCopyAccelerationStructureToMemoryInfoKHR {
        VkStructureType                       sType;
        const void*                           pNext;
        VkAccelerationStructureKHR            src;
        VkDeviceOrHostAddressKHR              dst;
        VkCopyAccelerationStructureModeKHR    mode;
    } VkCopyAccelerationStructureToMemoryInfoKHR;

## Members

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

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

- `src` is the source acceleration structure for the copy

- `dst` is the device or host address to memory which is the target for the copy

- `mode` is a VkCopyAccelerationStructureModeKHR value specifying additional operations to perform during the copy.

## Description

Valid Usage

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-src-04959
  The source acceleration structure `src` must have been constructed prior to the execution of this command

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-dst-03561
  The memory pointed to by `dst` must be at least as large as the serialization size of `src`, as reported by vkWriteAccelerationStructuresPropertiesKHR or vkCmdWriteAccelerationStructuresPropertiesKHR with a query type of `VK_QUERY_TYPE_ACCELERATION_STRUCTURE_SERIALIZATION_SIZE_KHR`

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-mode-03412
  `mode` must be `VK_COPY_ACCELERATION_STRUCTURE_MODE_SERIALIZE_KHR`

Valid Usage (Implicit)

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_COPY_ACCELERATION_STRUCTURE_TO_MEMORY_INFO_KHR`

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-pNext-pNext
  `pNext` must be `NULL`

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-src-parameter
  `src` must be a valid VkAccelerationStructureKHR handle

- VUID-VkCopyAccelerationStructureToMemoryInfoKHR-mode-parameter
  `mode` must be a valid VkCopyAccelerationStructureModeKHR value

## See Also

VK_KHR_acceleration_structure, VkAccelerationStructureKHR, VkCopyAccelerationStructureModeKHR, VkDeviceOrHostAddressKHR, VkStructureType, vkCmdCopyAccelerationStructureToMemoryKHR, vkCopyAccelerationStructureToMemoryKHR

## 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