Method draw

examples/vulkan/Vulkan.cpp:2447–2529

    }

    void draw()
    {
        std::uint32_t imageIndex = 0;

        // If the objects we need to submit this frame are still pending, wait here
        vkWaitForFences(device, 1, &fences[currentFrame], VK_TRUE, std::numeric_limits<std::uint64_t>::max());

        {
            // Get the next image in the swapchain
            const VkResult result = vkAcquireNextImageKHR(device,
                                                          swapchain,
                                                          std::numeric_limits<std::uint64_t>::max(),
                                                          imageAvailableSemaphores[currentFrame],
                                                          VK_NULL_HANDLE,
                                                          &imageIndex);

            // Check if we need to re-create the swapchain (e.g. if the window was resized)
            if (result == VK_ERROR_OUT_OF_DATE_KHR)
            {
                recreateSwapchain();
                swapchainOutOfDate = false;
                return;
            }

            if ((result != VK_SUCCESS) && (result != VK_TIMEOUT) && (result != VK_NOT_READY) &&
                (result != VK_SUBOPTIMAL_KHR))
            {
                vulkanAvailable = false;
                return;
            }
        }

        // Wait for the swapchain image to be available in the color attachment stage before submitting the queue
        const VkPipelineStageFlags waitStages = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;

        // Signal the render finished semaphore once the queue has been processed
        VkSubmitInfo submitInfo         = VkSubmitInfo();
        submitInfo.sType                = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        submitInfo.waitSemaphoreCount   = 1;
        submitInfo.pWaitSemaphores      = &imageAvailableSemaphores[currentFrame];
        submitInfo.pWaitDstStageMask    = &waitStages;
        submitInfo.commandBufferCount   = 1;
        submitInfo.pCommandBuffers      = &commandBuffers[imageIndex];
        submitInfo.signalSemaphoreCount = 1;
        submitInfo.pSignalSemaphores    = &renderFinishedSemaphores[currentFrame];

        vkResetFences(device, 1, &fences[currentFrame]);

        if (vkQueueSubmit(queue, 1, &submitInfo, fences[currentFrame]) != VK_SUCCESS)
        {
            vulkanAvailable = false;
            return;
        }

        // Wait for rendering to complete before presenting
        VkPresentInfoKHR presentInfo   = VkPresentInfoKHR();
        presentInfo.sType              = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
        presentInfo.waitSemaphoreCount = 1;