Function VulkanFlip

engine/graphics/src/vulkan/graphics_vulkan.cpp:1840–1940

    static void VulkanFlip(HContext _context)
    {
        DM_PROFILE(__FUNCTION__);
        VulkanContext* context = (VulkanContext*) _context;

        if (!context->m_FrameBegun)
        {
            return;
        }

        uint32_t frameInFlight = context->m_CurrentFrameInFlight;
        FrameResource& currentFrame = context->m_FrameResources[frameInFlight];

        // Determine the swapchain image we rendered to
        uint32_t swapchainImageIndex = context->m_SwapChain->m_ImageIndex;
        VkSemaphore renderFinishedSemaphore = context->m_SwapChain->m_RenderFinishedSemaphores[swapchainImageIndex];

        FlushPendingRenderTargetClear(context, context->m_CurrentRenderTarget);

        // End the current render pass
        EndRenderPass(context);

        // Present still requires a valid swapchain image layout even on frames that never
        // materialized the main render pass.
        if (!context->m_MainRTBegunThisFrame)
        {
            DM_MUTEX_SCOPED_LOCK(context->m_BaseContext.m_AssetHandleContainerMutex);
            VulkanTexture* tex_sc = GetAssetFromContainer<VulkanTexture>(context->m_BaseContext.m_AssetHandleContainer, context->m_CurrentSwapchainTexture);
            TransitionImageLayoutWithCmdBuffer(
                context->m_MainCommandBuffers[frameInFlight],
                tex_sc,
                VK_IMAGE_ASPECT_COLOR_BIT,
                VK_IMAGE_LAYOUT_PRESENT_SRC_KHR,
                0,
                1);
        }

        // Finish recording the command buffer for this frame-in-flight
        VkCommandBuffer cmd = context->m_MainCommandBuffers[frameInFlight];
        VkResult res = vkEndCommandBuffer(cmd);
        CHECK_VK_ERROR(res);

        // Submit the command buffer
        VkPipelineStageFlags waitStages = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
        VkSubmitInfo submitInfo = {};
        submitInfo.sType                = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        submitInfo.waitSemaphoreCount   = 1;
        submitInfo.pWaitSemaphores      = &currentFrame.m_ImageAvailable;
        submitInfo.pWaitDstStageMask    = &waitStages;
        submitInfo.commandBufferCount   = 1;
        submitInfo.pCommandBuffers      = &cmd;
        submitInfo.signalSemaphoreCount = 1;
        submitInfo.pSignalSemaphores    = &renderFinishedSemaphore;

        res = vkQueueSubmit(context->m_LogicalDevice.m_GraphicsQueue, 1, &submitInfo, currentFrame.m_SubmitFence);
        CHECK_VK_ERROR(res);

        // Present the swapchain image