# VkExportMetalDeviceInfoEXT(3) Manual Page

## Name

VkExportMetalDeviceInfoEXT - Structure that identifies a VkDevice object and corresponding Metal MTLDevice object

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## C Specification

To export the Metal `MTLDevice` object underlying the VkPhysicalDevice associated with a VkDevice object, include a `VkExportMetalDeviceInfoEXT` structure in the `pNext` chain of the `pMetalObjectsInfo` parameter of a vkExportMetalObjectsEXT call.

The `VkExportMetalDeviceInfoEXT` structure is defined as:

    // Provided by VK_EXT_metal_objects
    typedef struct VkExportMetalDeviceInfoEXT {
        VkStructureType    sType;
        const void*        pNext;
        MTLDevice_id       mtlDevice;
    } VkExportMetalDeviceInfoEXT;

## Members

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

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

- `mtlDevice` is the Metal `id<MTLDevice>` object underlying the VkPhysicalDevice associated with the VkDevice object identified in the call. The implementation will return the `MTLDevice` in this member, or it will return `NULL` if no `MTLDevice` could be found underlying the VkPhysicalDevice object.

## Description

Valid Usage (Implicit)

- VUID-VkExportMetalDeviceInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_EXPORT_METAL_DEVICE_INFO_EXT`

## See Also

VK_EXT_metal_objects, 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