# VkImportMetalIOSurfaceInfoEXT(3) Manual Page

## Name

VkImportMetalIOSurfaceInfoEXT - Structure that identifies a VkImage object and corresponding Metal IOSurfaceRef object to use.

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## C Specification

To import, or create, a Metal IOSurfaceRef object to underlie a VkImage object, include a `VkImportMetalIOSurfaceInfoEXT` structure in the `pNext` chain of the VkImageCreateInfo structure in a vkCreateImage command.

The `VkImportMetalIOSurfaceInfoEXT` structure is defined as:

    // Provided by VK_EXT_metal_objects
    typedef struct VkImportMetalIOSurfaceInfoEXT {
        VkStructureType    sType;
        const void*        pNext;
        IOSurfaceRef       ioSurface;
    } VkImportMetalIOSurfaceInfoEXT;

## Members

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

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

- `ioSurface` is VK_NULL_HANDLE or the Metal IOSurfaceRef object that is to underlie the VkImage.

## Description

If `ioSurface` is not VK_NULL_HANDLE, it will be used to underlie the VkImage. If `ioSurface` is VK_NULL_HANDLE, the implementation will create a new `IOSurface` to underlie the VkImage.

If provided, the application must ensure that the configuration of the IOSurfaceRef object is compatible with the configuration of the VkImage. Failure to do so results in undefined behavior.

Valid Usage (Implicit)

- VUID-VkImportMetalIOSurfaceInfoEXT-sType-sType
  `sType` must be `VK_STRUCTURE_TYPE_IMPORT_METAL_IO_SURFACE_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