CMakeLists.txt

find_package(glm REQUIRED)
find_package(Vulkan REQUIRED)
find_package(SDL2 REQUIRED)

add_library(IMGUI STATIC ../extern/imgui/imgui.cpp ../extern/imgui/imgui_draw.cpp ../extern/imgui/imgui_demo.cpp ../extern/imgui/imgui_tables.cpp ../extern/imgui/imgui_widgets.cpp ../extern/imgui/misc/cpp/imgui_stdlib.cpp ../extern/imgui/backends/imgui_impl_vulkan.cpp ../extern/imgui/backends/imgui_impl_vulkan.h ../extern/imgui/backends/imgui_impl_sdl.cpp ../extern/ImGuiFileDialog/ImGuiFileDialog.cpp)
target_include_directories(IMGUI PUBLIC ../extern/imgui ../extern/ImGuiFileDialog)
target_link_libraries(IMGUI PUBLIC Vulkan::Vulkan SDL2::SDL2)

add_library(SGVK STATIC sgvk/Renderer.cpp sgvk/Renderer.h sgvk/Context.cpp sgvk/vk.h sgvk/Context.h)
target_include_directories(SGVK PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
target_link_libraries(SGVK PUBLIC SG glm::glm common SGRENDER Vulkan::Vulkan IMGUI)

if (APPLE)
    target_link_libraries(SGVK PUBLIC "-framework Cocoa" "-framework IOKit")
endif()

imgui_initialization_code.cpp

    ImGui_ImplVulkan_InitInfo initInfo{};
    initInfo.Instance = ctx.instance;
    initInfo.PhysicalDevice = ctx.physicalDevice;
    initInfo.Device = ctx.device;
    initInfo.QueueFamily = ctx.graphicsIndex;
    initInfo.Queue = ctx.graphicsQueue;
    initInfo.DescriptorPool = ctx.descriptorPool;
    initInfo.MSAASamples = VK_SAMPLE_COUNT_1_BIT;
    initInfo.MinImageCount = ctx.imageCount;
    initInfo.ImageCount = ctx.imageCount;
    initInfo.Subpass = 1;
    initInfo.CheckVkResultFn = check_vk_result;

    int w, h;
    SDL_Vulkan_GetDrawableSize(window, &w, &h);

    LOG("Renderer: Initializing IMGUI");
    IMGUI_CHECKVERSION();
    imctx = ImGui::CreateContext();
    ImGuiIO &io = ImGui::GetIO();
    io.DisplaySize = ImVec2((float) w, (float) h);
    io.DisplayFramebufferScale = ImVec2(1, 1);
    io.Fonts->AddFontDefault();
    io.Fonts->Build();
    ImGui::StyleColorsDark();

    ImGui_ImplSDL2_InitForVulkan(window);
    ImGui_ImplVulkan_Init(&initInfo, renderPass);

    auto cb = ctx.CreateOneShotCommandBuffer();
    assert(ImGui_ImplVulkan_CreateFontsTexture(cb));
    ctx.SubmitOneShotCommandBuffer(cb);
    ImGui_ImplVulkan_DestroyFontUploadObjects();

    // stupid workaround
    ImGui_ImplVulkan_SetMinImageCount(ctx.imageCount);

imgui_on_end_frame.cpp

    auto cb = ctx.CurrentCmdBuf();
    cb.nextSubpass(vk::SubpassContents::eInline);
    cb.bindDescriptorSets(vk::PipelineBindPoint::eGraphics, postPipelineLayout, 0, 1, &postDescriptorSet, 0, nullptr);
    cb.bindPipeline(vk::PipelineBindPoint::eGraphics, postPipeline);
    cb.draw(3, 1, 0, 0);
    // The stuff above is just to show you that this happens in the second subpass of my render pass which has one
    // color attachment for output.

    ImGui::Render();
    ImDrawData *dd = ImGui::GetDrawData();
    if (dd && dd->Valid && dd->DisplaySize.x > 0.0f && dd->DisplaySize.y > 0.0f) {
        ImGui_ImplVulkan_RenderDrawData(dd, cb);
    }
    
    cb.endRenderPass();
    cb.end();
    // ctx.endFrame basically just submits:
    ctx.EndFrame();
    
    

imgui_on_new_frame.cpp

    ImGui_ImplSDL2_NewFrame(window);
    ImGui_ImplVulkan_NewFrame();
    ImGui::NewFrame();