ImGui initialized but not shown on window

[Can-Inal]

I'm working on a Vulkan Graphics Engine and following a youtube tutorial "https://www.youtube.com/playlist?list=PL8327DO66nu9qYVKLDmdLW_84-yE4auCR". other than just following those tutorials i wanted to implement ImGui by myself. My Code compiles and runs and even imgui.ini is created but i cant see any ImGui window on my screen.

    VkDescriptorPoolCreateInfo poolInfo = {};
    poolInfo.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
    poolInfo.poolSizeCount = static_cast<uint32_t>(poolSizes.size());
    poolInfo.pPoolSizes = poolSizes.data();
    poolInfo.maxSets = static_cast<uint32_t>(m_renderer.imageCount()) + 1;

    if (vkCreateDescriptorPool(m_device.device(), &poolInfo, nullptr, &descriptorPool) != VK_SUCCESS) {
        throw std::runtime_error("failed to create descriptor pool!");
    }

    QueueFamilyIndices Indices = m_device.findPhysicalQueueFamilies();

    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO(); (void)io;
    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;
    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;
    //io.Fonts->AddFontFromFileTTF("../../Assets/Fonts/Roboto-Medium.ttf", 16.0f);

    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
    ImGuiStyle& style = ImGui::GetStyle();
    if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
    {
        style.WindowRounding = 0.0f;
        style.Colors[ImGuiCol_WindowBg].w = 1.0f;
    }

    io.DisplaySize = ImVec2(800, 600);
    io.DisplayFramebufferScale = ImVec2(1.0f, 1.0f);

    // Setup Platform/Renderer bindings
    ImGui_ImplGlfw_InitForVulkan(m_window.getWindowHandle(), true);
    ImGui_ImplVulkan_InitInfo init_info = {};
    init_info.Instance = m_device.getinstance();
    init_info.PhysicalDevice = m_device.getPhysicalDevice();
    init_info.Device = m_device.device();
    init_info.QueueFamily = Indices.graphicsFamily;
    init_info.Queue = m_device.presentQueue();
    init_info.PipelineCache = VK_NULL_HANDLE;
    init_info.DescriptorPool = descriptorPool;
    init_info.Allocator = NULL;
    init_info.MinImageCount = 2;
    init_info.ImageCount = static_cast<uint32_t>(m_renderer.imageCount());
    init_info.CheckVkResultFn = NULL;
    ImGui_ImplVulkan_Init(&init_info, m_renderer.getSwapChainRenderPass());

    // Setup Dear ImGui style
    ImGui::StyleColorsDark();

    VkCommandBuffer commandBuffer = m_device.beginSingleTimeCommands();
    ImGui_ImplVulkan_CreateFontsTexture(commandBuffer);
    m_device.endSingleTimeCommands(commandBuffer);
    ImGui_ImplVulkan_DestroyFontUploadObjects();

this is my InitImGui function. Im quite new with computer graphics and vulkan. I appreciate your helps thank you!

[emoon]

My suggestion would be that you take a look at an existing Vulkan implementation such as this https://github.com/ocornut/imgui/blob/master/examples/example_glfw_vulkan/main.cpp

Get the example up and running and then you can compare what the example is doing and what your code may be doing differently.

[Can-Inal]

sorry for late reply, I checked this example implementation and figured out what i was missing! a silly mistake but i forgot to call ImGui_ImplVulkan_RenderDrawData(ImGui::GetDrawData(), commandBuffer); at the end of frame. Thanks for help 😄