C Specification

To acquire an available presentable image to use, and retrieve the index of that image, call:

// Provided by VK_KHR_swapchain
VkResult vkAcquireNextImageKHR(
    VkDevice                                    device,
    VkSwapchainKHR                              swapchain,
    uint64_t                                    timeout,
    VkSemaphore                                 semaphore,
    VkFence                                     fence,
    uint32_t*                                   pImageIndex);


  • device is the device associated with swapchain.

  • swapchain is the non-retired swapchain from which an image is being acquired.

  • timeout specifies how long the function waits, in nanoseconds, if no image is available.

  • semaphore is VK_NULL_HANDLE or a semaphore to signal.

  • fence is VK_NULL_HANDLE or a fence to signal.

  • pImageIndex is a pointer to a uint32_t in which the index of the next image to use (i.e. an index into the array of images returned by vkGetSwapchainImagesKHR) is returned.


If the swapchain has been created with the VK_SWAPCHAIN_CREATE_DEFERRED_MEMORY_ALLOCATION_BIT_EXT flag, the image whose index is returned in pImageIndex will be fully backed by memory before this call returns to the application, as if it is bound completely and contiguously to a single VkDeviceMemory object.

Valid Usage
  • VUID-vkAcquireNextImageKHR-swapchain-01285
    swapchain must not be in the retired state

  • VUID-vkAcquireNextImageKHR-semaphore-01286
    If semaphore is not VK_NULL_HANDLE it must be unsignaled

  • VUID-vkAcquireNextImageKHR-semaphore-01779
    If semaphore is not VK_NULL_HANDLE it must not have any uncompleted signal or wait operations pending

  • VUID-vkAcquireNextImageKHR-fence-01287
    If fence is not VK_NULL_HANDLE it must be unsignaled and must not be associated with any other queue command that has not yet completed execution on that queue

  • VUID-vkAcquireNextImageKHR-semaphore-01780
    semaphore and fence must not both be equal to VK_NULL_HANDLE

  • VUID-vkAcquireNextImageKHR-surface-07783
    If forward progress cannot be guaranteed for the surface used to create the swapchain member of pAcquireInfo, the timeout member of pAcquireInfo must not be UINT64_MAX

  • VUID-vkAcquireNextImageKHR-semaphore-03265
    semaphore must have a VkSemaphoreType of VK_SEMAPHORE_TYPE_BINARY

Valid Usage (Implicit)
  • VUID-vkAcquireNextImageKHR-device-parameter
    device must be a valid VkDevice handle

  • VUID-vkAcquireNextImageKHR-swapchain-parameter
    swapchain must be a valid VkSwapchainKHR handle

  • VUID-vkAcquireNextImageKHR-semaphore-parameter
    If semaphore is not VK_NULL_HANDLE, semaphore must be a valid VkSemaphore handle

  • VUID-vkAcquireNextImageKHR-fence-parameter
    If fence is not VK_NULL_HANDLE, fence must be a valid VkFence handle

  • VUID-vkAcquireNextImageKHR-pImageIndex-parameter
    pImageIndex must be a valid pointer to a uint32_t value

  • VUID-vkAcquireNextImageKHR-swapchain-parent
    swapchain must have been created, allocated, or retrieved from device

  • VUID-vkAcquireNextImageKHR-semaphore-parent
    If semaphore is a valid handle, it must have been created, allocated, or retrieved from device

  • VUID-vkAcquireNextImageKHR-fence-parent
    If fence is a valid handle, it must have been created, allocated, or retrieved from device

Host Synchronization
  • Host access to swapchain must be externally synchronized

  • Host access to semaphore must be externally synchronized

  • Host access to fence must be externally synchronized

Return Codes
On success, this command returns




On failure, this command returns






See Also

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 2014-2024 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0