# VkPresentInfoKHR(3) Manual Page

## Name

VkPresentInfoKHR - Structure describing parameters of a queue presentation

## C Specification

The `VkPresentInfoKHR` structure is defined as:

    typedef struct VkPresentInfoKHR {
        VkStructureType          sType;
        const void*              pNext;
        uint32_t                 waitSemaphoreCount;
        const VkSemaphore*       pWaitSemaphores;
        uint32_t                 swapchainCount;
        const VkSwapchainKHR*    pSwapchains;
        const uint32_t*          pImageIndices;
        VkResult*                pResults;
    } VkPresentInfoKHR;

## Members

- `sType` is the type of this structure.

- `pNext` is `NULL` or a pointer to an extension-specific structure.

- `waitSemaphoreCount` is the number of semaphores to wait for before issuing the present request. The number may be zero.

- `pWaitSemaphores` is `NULL` or a pointer to an array of VkSemaphore objects with `waitSemaphoreCount` entries, and specifies the semaphores to wait for before issuing the present request.

- `swapchainCount` is the number of swapchains being presented to by this command.

- `pSwapchains` is a pointer to an array of VkSwapchainKHR objects with `swapchainCount` entries. A given swapchain must not appear in this list more than once.

- `pImageIndices` is a pointer to an array of indices into the array of each swapchain’s presentable images, with `swapchainCount` entries. Each entry in this array identifies the image to present on the corresponding entry in the `pSwapchains` array.

- `pResults` is a pointer to an array of VkResult typed elements with `swapchainCount` entries. Applications that do not need per-swapchain results can use `NULL` for `pResults`. If non-`NULL`, each entry in `pResults` will be set to the VkResult for presenting the swapchain corresponding to the same index in `pSwapchains`.

## Description

Before an application can present an image, the image’s layout must be transitioned to the `VK_IMAGE_LAYOUT_PRESENT_SRC_KHR` layout, or for a shared presentable image the `VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR` layout.

| Note When transitioning the image to `VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR` or `VK_IMAGE_LAYOUT_PRESENT_SRC_KHR`, there is no need to delay subsequent processing, or perform any visibility operations (as vkQueuePresentKHR performs automatic visibility operations). To achieve this, the `dstAccessMask` member of the VkImageMemoryBarrier should be set to `0`, and the `dstStageMask` parameter should be set to `VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT`.

Valid Usage

- Each element of `pImageIndices` must be the index of a presentable image acquired from the swapchain specified by the corresponding element of the `pSwapchains` array, and the presented image subresource must be in the `VK_IMAGE_LAYOUT_PRESENT_SRC_KHR` or `VK_IMAGE_LAYOUT_SHARED_PRESENT_KHR` layout at the time the operation is executed on a `VkDevice`

- All elements of the `pWaitSemaphores` must have a VkSemaphoreType of `VK_SEMAPHORE_TYPE_BINARY`

Valid Usage (Implicit)

- `sType` must be `VK_STRUCTURE_TYPE_PRESENT_INFO_KHR`

- Each `pNext` member of any structure (including this one) in the `pNext` chain must be either `NULL` or a pointer to a valid instance of VkDeviceGroupPresentInfoKHR, VkDisplayPresentInfoKHR, VkPresentFrameTokenGGP, VkPresentRegionsKHR, or VkPresentTimesInfoGOOGLE

- The `sType` value of each struct in the `pNext` chain must be unique

- If `waitSemaphoreCount` is not `0`, `pWaitSemaphores` must be a valid pointer to an array of `waitSemaphoreCount` valid VkSemaphore handles

- `pSwapchains` must be a valid pointer to an array of `swapchainCount` valid VkSwapchainKHR handles

- `pImageIndices` must be a valid pointer to an array of `swapchainCount` `uint32_t` values

- If `pResults` is not `NULL`, `pResults` must be a valid pointer to an array of `swapchainCount` VkResult values

- `swapchainCount` must be greater than `0`

- Both of the elements of `pSwapchains`, and the elements of `pWaitSemaphores` that are valid handles of non-ignored parameters must have been created, allocated, or retrieved from the same VkInstance

## See Also

VkResult, VkSemaphore, VkStructureType, VkSwapchainKHR, vkQueuePresentKHR

## 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 (c) 2014-2020 Khronos Group. This work is licensed under a Creative Commons Attribution 4.0 International License.