vkAcquireNextImage2KHR

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

VkResult vkAcquireNextImage2KHR(
    VkDevice device,
    const VkAcquireNextImageInfoKHR* pAcquireInfo,
    uint32_t* pImageIndex);

• device is the device associated with swapchain.
• pAcquireInfo is a pointer to a VkAcquireNextImageInfoKHR structure containing parameters of the acquire.
• pImageIndex is a pointer to a uint32_t that is set to the index of the next image to use.

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.