vkGetSwapchainCounterEXT

The requested counters become active when the first presentation command for the associated swapchain is processed by the presentation engine. To query the value of an active counter, use:

VkResult vkGetSwapchainCounterEXT(
    VkDevice device,
    VkSwapchainKHR swapchain,
    VkSurfaceCounterFlagBitsEXT counter,
    uint64_t* pCounterValue);

• device is the VkDevice associated with swapchain.
• swapchain is the swapchain from which to query the counter value.
• counter is a VkSurfaceCounterFlagBitsEXT value specifying the counter to query.
• pCounterValue will return the current value of the counter.

If a counter is not available because the swapchain is out of date, the implementation may return VK_ERROR_OUT_OF_DATE_KHR.