# vkGetPhysicalDeviceDisplayPropertiesKHR(3) Manual Page

## Name

vkGetPhysicalDeviceDisplayPropertiesKHR - Query information about the available displays

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## C Specification

Various functions are provided for enumerating the available display devices present on a Vulkan physical device. To query information about the available displays, call:

    // Provided by VK_KHR_display
    VkResult vkGetPhysicalDeviceDisplayPropertiesKHR(
        VkPhysicalDevice                            physicalDevice,
        uint32_t*                                   pPropertyCount,
        VkDisplayPropertiesKHR*                     pProperties);

## Parameters

- `physicalDevice` is a physical device.

- `pPropertyCount` is a pointer to an integer related to the number of display devices available or queried, as described below.

- `pProperties` is either `NULL` or a pointer to an array of VkDisplayPropertiesKHR structures.

## Description

If `pProperties` is `NULL`, then the number of display devices available for `physicalDevice` is returned in `pPropertyCount`. Otherwise, `pPropertyCount` must point to a variable set by the application to the number of elements in the `pProperties` array, and on return the variable is overwritten with the number of structures actually written to `pProperties`. If the value of `pPropertyCount` is less than the number of display devices for `physicalDevice`, at most `pPropertyCount` structures will be written, and `VK_INCOMPLETE` will be returned instead of `VK_SUCCESS`, to indicate that not all the available properties were returned.

Valid Usage (Implicit)

- VUID-vkGetPhysicalDeviceDisplayPropertiesKHR-physicalDevice-parameter
  `physicalDevice` must be a valid VkPhysicalDevice handle

- VUID-vkGetPhysicalDeviceDisplayPropertiesKHR-pPropertyCount-parameter
  `pPropertyCount` must be a valid pointer to a `uint32_t` value

- VUID-vkGetPhysicalDeviceDisplayPropertiesKHR-pProperties-parameter
  If the value referenced by `pPropertyCount` is not `0`, and `pProperties` is not `NULL`, `pProperties` must be a valid pointer to an array of `pPropertyCount` VkDisplayPropertiesKHR structures

Return Codes

On success, this command returns

  - `VK_SUCCESS`

  - `VK_INCOMPLETE`

On failure, this command returns

  - `VK_ERROR_OUT_OF_HOST_MEMORY`

  - `VK_ERROR_OUT_OF_DEVICE_MEMORY`

## See Also

VK_KHR_display, VkDisplayPropertiesKHR, VkPhysicalDevice

## 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