main.cpp

// Dear ImGui: standalone example application for Glfw + Vulkan

// Learn about Dear ImGui:
// - FAQ                  https://dearimgui.com/faq
// - Getting Started      https://dearimgui.com/getting-started
// - Documentation        https://dearimgui.com/docs (same as your local docs/ folder).
// - Introduction, links and more at the top of imgui.cpp

// Important note to the reader who wish to integrate imgui_impl_vulkan.cpp/.h in their own engine/app.
// - Common ImGui_ImplVulkan_XXX functions and structures are used to interface with imgui_impl_vulkan.cpp/.h.
//   You will use those if you want to use this rendering backend in your engine/app.
// - Helper ImGui_ImplVulkanH_XXX functions and structures are only used by this example (main.cpp) and by
//   the backend itself (imgui_impl_vulkan.cpp), but should PROBABLY NOT be used by your own engine/app code.
// Read comments in imgui_impl_vulkan.h.

#include "atom.h"
#include "imgui.h"
#include <vector>

// Volk headers
#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
#define VOLK_IMPLEMENTATION
#include <volk.h>
#endif

// [Win32] Our example includes a copy of glfw3.lib pre-compiled with VS2010 to maximize ease of testing and compatibility with old VS compilers.
// To link with VS2010-era libraries, VS2015+ requires linking with legacy_stdio_definitions.lib, which we do using this pragma.
// Your own project should not be affected, as you are likely to link with a newer binary of GLFW that is adequate for your version of Visual Studio.
#if defined(_MSC_VER) && (_MSC_VER >= 1900) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS)
#pragma comment(lib, "legacy_stdio_definitions")
#endif

// #define APP_USE_UNLIMITED_FRAME_RATE
#ifdef _DEBUG
#define APP_USE_VULKAN_DEBUG_REPORT
#endif

// Data
static VkAllocationCallbacks   *g_Allocator      = nullptr;
static VkInstance               g_Instance       = VK_NULL_HANDLE;
static VkPhysicalDevice         g_PhysicalDevice = VK_NULL_HANDLE;
static VkDevice                 g_Device         = VK_NULL_HANDLE;
static uint32_t                 g_QueueFamily    = (uint32_t)-1;
static VkQueue                  g_Queue          = VK_NULL_HANDLE;
static VkDebugReportCallbackEXT g_DebugReport    = VK_NULL_HANDLE;
static VkPipelineCache          g_PipelineCache  = VK_NULL_HANDLE;
static VkDescriptorPool         g_DescriptorPool = VK_NULL_HANDLE;

static ImGui_ImplVulkanH_Window g_MainWindowData;
static int                      g_MinImageCount    = 2;
static bool                     g_SwapChainRebuild = false;

static void glfw_error_callback(int error, const char *description)
{
    fprintf(stderr, "GLFW Error %d: %s\n", error, description);
}
static void check_vk_result(VkResult err)
{
    if (err == 0)
        return;
    fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
    if (err < 0)
        abort();
}

#ifdef APP_USE_VULKAN_DEBUG_REPORT
static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(VkDebugReportFlagsEXT flags, VkDebugReportObjectTypeEXT objectType, uint64_t object, size_t location, int32_t messageCode, const char *pLayerPrefix, const char *pMessage, void *pUserData)
{
    (void)flags;
    (void)object;
    (void)location;
    (void)messageCode;
    (void)pUserData;
    (void)pLayerPrefix;  // Unused arguments
    fprintf(stderr, "[vulkan] Debug report from ObjectType: %i\nMessage: %s\n\n", objectType, pMessage);
    return VK_FALSE;
}
#endif  // APP_USE_VULKAN_DEBUG_REPORT

static bool IsExtensionAvailable(const ImVector<VkExtensionProperties> &properties, const char *extension)
{
    for (const VkExtensionProperties &p : properties)
        if (strcmp(p.extensionName, extension) == 0)
            return true;
    return false;
}

static VkPhysicalDevice SetupVulkan_SelectPhysicalDevice()
{
    uint32_t gpu_count;
    VkResult err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, nullptr);
    check_vk_result(err);
    IM_ASSERT(gpu_count > 0);

    ImVector<VkPhysicalDevice> gpus;
    gpus.resize(gpu_count);
    err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus.Data);
    check_vk_result(err);

    // If a number >1 of GPUs got reported, find discrete GPU if present, or use first one available. This covers
    // most common cases (multi-gpu/integrated+dedicated graphics). Handling more complicated setups (multiple
    // dedicated GPUs) is out of scope of this sample.
    for (VkPhysicalDevice &device : gpus)
    {
        VkPhysicalDeviceProperties properties;
        vkGetPhysicalDeviceProperties(device, &properties);
        if (properties.deviceType == VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU)
            return device;
    }

    // Use first GPU (Integrated) is a Discrete one is not available.
    if (gpu_count > 0)
        return gpus[0];
    return VK_NULL_HANDLE;
}

static void SetupVulkan(ImVector<const char *> instance_extensions)
{
    VkResult err;
#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
    volkInitialize();
#endif

    // Create Vulkan Instance
    {
        VkInstanceCreateInfo create_info = {};
        create_info.sType                = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;

        // Enumerate available extensions
        uint32_t                        properties_count;
        ImVector<VkExtensionProperties> properties;
        vkEnumerateInstanceExtensionProperties(nullptr, &properties_count, nullptr);
        properties.resize(properties_count);
        err = vkEnumerateInstanceExtensionProperties(nullptr, &properties_count, properties.Data);
        check_vk_result(err);

        // Enable required extensions
        if (IsExtensionAvailable(properties, VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME))
            instance_extensions.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);
#ifdef VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME
        if (IsExtensionAvailable(properties, VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME))
        {
            instance_extensions.push_back(VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME);
            create_info.flags |= VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR;
        }
#endif

        // Enabling validation layers
#ifdef APP_USE_VULKAN_DEBUG_REPORT
        const char *layers[]            = {"VK_LAYER_KHRONOS_validation"};
        create_info.enabledLayerCount   = 1;
        create_info.ppEnabledLayerNames = layers;
        instance_extensions.push_back("VK_EXT_debug_report");
#endif

        // Create Vulkan Instance
        create_info.enabledExtensionCount   = (uint32_t)instance_extensions.Size;
        create_info.ppEnabledExtensionNames = instance_extensions.Data;
        err                                 = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
        check_vk_result(err);
#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
        volkLoadInstance(g_Instance);
#endif

        // Setup the debug report callback
#ifdef APP_USE_VULKAN_DEBUG_REPORT
        auto f_vkCreateDebugReportCallbackEXT = (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
        IM_ASSERT(f_vkCreateDebugReportCallbackEXT != nullptr);
        VkDebugReportCallbackCreateInfoEXT debug_report_ci = {};
        debug_report_ci.sType                              = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT;
        debug_report_ci.flags                              = VK_DEBUG_REPORT_ERROR_BIT_EXT | VK_DEBUG_REPORT_WARNING_BIT_EXT | VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;
        debug_report_ci.pfnCallback                        = debug_report;
        debug_report_ci.pUserData                          = nullptr;
        err                                                = f_vkCreateDebugReportCallbackEXT(g_Instance, &debug_report_ci, g_Allocator, &g_DebugReport);
        check_vk_result(err);
#endif
    }

    // Select Physical Device (GPU)
    g_PhysicalDevice = SetupVulkan_SelectPhysicalDevice();

    // Select graphics queue family
    {
        uint32_t count;
        vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, nullptr);
        VkQueueFamilyProperties *queues = (VkQueueFamilyProperties *)malloc(sizeof(VkQueueFamilyProperties) * count);
        vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, queues);
        for (uint32_t i = 0; i < count; i++)
            if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
            {
                g_QueueFamily = i;
                break;
            }
        free(queues);
        IM_ASSERT(g_QueueFamily != (uint32_t)-1);
    }

    // Create Logical Device (with 1 queue)
    {
        ImVector<const char *> device_extensions;
        device_extensions.push_back("VK_KHR_swapchain");

        // Enumerate physical device extension
        uint32_t                        properties_count;
        ImVector<VkExtensionProperties> properties;
        vkEnumerateDeviceExtensionProperties(g_PhysicalDevice, nullptr, &properties_count, nullptr);
        properties.resize(properties_count);
        vkEnumerateDeviceExtensionProperties(g_PhysicalDevice, nullptr, &properties_count, properties.Data);
#ifdef VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME
        if (IsExtensionAvailable(properties, VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME))
            device_extensions.push_back(VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME);
#endif

        const float             queue_priority[] = {1.0f};
        VkDeviceQueueCreateInfo queue_info[1]    = {};
        queue_info[0].sType                      = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
        queue_info[0].queueFamilyIndex           = g_QueueFamily;
        queue_info[0].queueCount                 = 1;
        queue_info[0].pQueuePriorities           = queue_priority;
        VkDeviceCreateInfo create_info           = {};
        create_info.sType                        = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
        create_info.queueCreateInfoCount         = sizeof(queue_info) / sizeof(queue_info[0]);
        create_info.pQueueCreateInfos            = queue_info;
        create_info.enabledExtensionCount        = (uint32_t)device_extensions.Size;
        create_info.ppEnabledExtensionNames      = device_extensions.Data;
        err                                      = vkCreateDevice(g_PhysicalDevice, &create_info, g_Allocator, &g_Device);
        check_vk_result(err);
        vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
    }

    // Create Descriptor Pool
    // The example only requires a single combined image sampler descriptor for the font image and only uses one descriptor set (for that)
    // If you wish to load e.g. additional textures you may need to alter pools sizes.
    {
        VkDescriptorPoolSize pool_sizes[] =
            {
                {VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1},
            };
        VkDescriptorPoolCreateInfo pool_info = {};
        pool_info.sType                      = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
        pool_info.flags                      = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
        pool_info.maxSets                    = 1;
        pool_info.poolSizeCount              = (uint32_t)IM_ARRAYSIZE(pool_sizes);
        pool_info.pPoolSizes                 = pool_sizes;
        err                                  = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
        check_vk_result(err);
    }
}

// All the ImGui_ImplVulkanH_XXX structures/functions are optional helpers used by the demo.
// Your real engine/app may not use them.
static void SetupVulkanWindow(ImGui_ImplVulkanH_Window *wd, VkSurfaceKHR surface, int width, int height)
{
    wd->Surface = surface;

    // Check for WSI support
    VkBool32 res;
    vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, wd->Surface, &res);
    if (res != VK_TRUE)
    {
        fprintf(stderr, "Error no WSI support on physical device 0\n");
        exit(-1);
    }

    // Select Surface Format
    const VkFormat        requestSurfaceImageFormat[] = {VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM};
    const VkColorSpaceKHR requestSurfaceColorSpace    = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
    wd->SurfaceFormat                                 = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);

    // Select Present Mode
#ifdef APP_USE_UNLIMITED_FRAME_RATE
    VkPresentModeKHR present_modes[] = {VK_PRESENT_MODE_MAILBOX_KHR, VK_PRESENT_MODE_IMMEDIATE_KHR, VK_PRESENT_MODE_FIFO_KHR};
#else
    VkPresentModeKHR present_modes[] = {VK_PRESENT_MODE_FIFO_KHR};
#endif
    wd->PresentMode = ImGui_ImplVulkanH_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_modes[0], IM_ARRAYSIZE(present_modes));
    // printf("[vulkan] Selected PresentMode = %d\n", wd->PresentMode);

    // Create SwapChain, RenderPass, Framebuffer, etc.
    IM_ASSERT(g_MinImageCount >= 2);
    ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, width, height, g_MinImageCount);
}

static void CleanupVulkan()
{
    vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);

#ifdef APP_USE_VULKAN_DEBUG_REPORT
    // Remove the debug report callback
    auto f_vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT");
    f_vkDestroyDebugReportCallbackEXT(g_Instance, g_DebugReport, g_Allocator);
#endif  // APP_USE_VULKAN_DEBUG_REPORT

    vkDestroyDevice(g_Device, g_Allocator);
    vkDestroyInstance(g_Instance, g_Allocator);
}

static void CleanupVulkanWindow()
{
    ImGui_ImplVulkanH_DestroyWindow(g_Instance, g_Device, &g_MainWindowData, g_Allocator);
}

static void FrameRender(ImGui_ImplVulkanH_Window *wd, ImDrawData *draw_data)
{
    VkResult err;

    VkSemaphore image_acquired_semaphore  = wd->FrameSemaphores[wd->SemaphoreIndex].ImageAcquiredSemaphore;
    VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
    err                                   = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
    if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
    {
        g_SwapChainRebuild = true;
        return;
    }
    check_vk_result(err);

    ImGui_ImplVulkanH_Frame *fd = &wd->Frames[wd->FrameIndex];
    {
        err = vkWaitForFences(g_Device, 1, &fd->Fence, VK_TRUE, UINT64_MAX);  // wait indefinitely instead of periodically checking
        check_vk_result(err);

        err = vkResetFences(g_Device, 1, &fd->Fence);
        check_vk_result(err);
    }
    {
        err = vkResetCommandPool(g_Device, fd->CommandPool, 0);
        check_vk_result(err);
        VkCommandBufferBeginInfo info = {};
        info.sType                    = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
        err = vkBeginCommandBuffer(fd->CommandBuffer, &info);
        check_vk_result(err);
    }
    {
        VkRenderPassBeginInfo info    = {};
        info.sType                    = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
        info.renderPass               = wd->RenderPass;
        info.framebuffer              = fd->Framebuffer;
        info.renderArea.extent.width  = wd->Width;
        info.renderArea.extent.height = wd->Height;
        info.clearValueCount          = 1;
        info.pClearValues             = &wd->ClearValue;
        vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
    }

    // Record dear imgui primitives into command buffer
    ImGui_ImplVulkan_RenderDrawData(draw_data, fd->CommandBuffer);

    // Submit command buffer
    vkCmdEndRenderPass(fd->CommandBuffer);
    {
        VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
        VkSubmitInfo         info       = {};
        info.sType                      = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        info.waitSemaphoreCount         = 1;
        info.pWaitSemaphores            = &image_acquired_semaphore;
        info.pWaitDstStageMask          = &wait_stage;
        info.commandBufferCount         = 1;
        info.pCommandBuffers            = &fd->CommandBuffer;
        info.signalSemaphoreCount       = 1;
        info.pSignalSemaphores          = &render_complete_semaphore;

        err = vkEndCommandBuffer(fd->CommandBuffer);
        check_vk_result(err);
        err = vkQueueSubmit(g_Queue, 1, &info, fd->Fence);
        check_vk_result(err);
    }
}

static void FramePresent(ImGui_ImplVulkanH_Window *wd)
{
    if (g_SwapChainRebuild)
        return;
    VkSemaphore      render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
    VkPresentInfoKHR info                      = {};
    info.sType                                 = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
    info.waitSemaphoreCount                    = 1;
    info.pWaitSemaphores                       = &render_complete_semaphore;
    info.swapchainCount                        = 1;
    info.pSwapchains                           = &wd->Swapchain;
    info.pImageIndices                         = &wd->FrameIndex;
    VkResult err                               = vkQueuePresentKHR(g_Queue, &info);
    if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
    {
        g_SwapChainRebuild = true;
        return;
    }
    check_vk_result(err);
    wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->SemaphoreCount;  // Now we can use the next set of semaphores
}

// Main code
int main(int, char **)
{
    glfwSetErrorCallback(glfw_error_callback);
    if (!glfwInit())
        return 1;

    // 设置 offscreen context 的标志位
    glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);

    // Create window with Vulkan context
    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
    GLFWwindow *window = glfwCreateWindow(1280, 720, "atom", nullptr, nullptr);
    if (!glfwVulkanSupported())
    {
        printf("GLFW: Vulkan Not Supported\n");
        return 1;
    }

    ImVector<const char *> extensions;
    uint32_t               extensions_count = 0;
    const char           **glfw_extensions  = glfwGetRequiredInstanceExtensions(&extensions_count);
    for (uint32_t i = 0; i < extensions_count; i++)
        extensions.push_back(glfw_extensions[i]);
    SetupVulkan(extensions);

    // Create Window Surface
    VkSurfaceKHR surface;
    VkResult     err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &surface);
    check_vk_result(err);

    // Create Framebuffers
    int w, h;
    glfwGetFramebufferSize(window, &w, &h);
    ImGui_ImplVulkanH_Window *wd = &g_MainWindowData;
    SetupVulkanWindow(wd, surface, w, h);

    // Setup Dear ImGui context
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGuiIO &io = ImGui::GetIO();
    (void)io;
    io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
    io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad;   // Enable Gamepad Controls
    io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;      // Enable Docking
    io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable;    // Enable Multi-Viewport / Platform Windows
    io.ConfigViewportsNoAutoMerge = true;
    // io.ConfigViewportsNoTaskBarIcon = true;

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

    bool window_is_open = true;

    // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
    ImGuiStyle &style = ImGui::GetStyle();
    InitStyle(style);

    // Setup Platform/Renderer backends
    ImGui_ImplGlfw_InitForVulkan(window, true);
    ImGui_ImplVulkan_InitInfo init_info = {};
    init_info.Instance                  = g_Instance;
    init_info.PhysicalDevice            = g_PhysicalDevice;
    init_info.Device                    = g_Device;
    init_info.QueueFamily               = g_QueueFamily;
    init_info.Queue                     = g_Queue;
    init_info.PipelineCache             = g_PipelineCache;
    init_info.DescriptorPool            = g_DescriptorPool;
    init_info.RenderPass                = wd->RenderPass;
    init_info.Subpass                   = 0;
    init_info.MinImageCount             = g_MinImageCount;
    init_info.ImageCount                = wd->ImageCount;
    init_info.MSAASamples               = VK_SAMPLE_COUNT_1_BIT;
    init_info.Allocator                 = g_Allocator;
    init_info.CheckVkResultFn           = check_vk_result;
    ImGui_ImplVulkan_Init(&init_info);

    // Load Fonts
    io.Fonts->AddFontFromFileTTF("../HYWenHei-85W.ttf", 36.0, nullptr, io.Fonts->GetGlyphRangesChineseFull());

    // Main loop
    while (window_is_open)
    {
        // Poll and handle events (inputs, window resize, etc.)
        // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
        // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
        // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
        // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
        glfwPollEvents();

        // Resize swap chain?
        int fb_width, fb_height;
        glfwGetFramebufferSize(window, &fb_width, &fb_height);
        if (fb_width > 0 && fb_height > 0 && (g_SwapChainRebuild || g_MainWindowData.Width != fb_width || g_MainWindowData.Height != fb_height))
        {
            ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
            ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount);
            g_MainWindowData.FrameIndex = 0;
            g_SwapChainRebuild          = false;
        }
        if (glfwGetWindowAttrib(window, GLFW_ICONIFIED) != 0)
        {
            ImGui_ImplGlfw_Sleep(10);
            continue;
        }

        // Start the Dear ImGui frame
        ImGui_ImplVulkan_NewFrame();
        ImGui_ImplGlfw_NewFrame();
        ImGui::NewFrame();
        // ImGui::DockSpaceOverViewport();

        ImGuiWindowFlags window_flags = 0;
        window_flags |= ImGuiWindowFlags_NoTitleBar;

        // 获取主显示器
        GLFWmonitor *primary_monitor = glfwGetPrimaryMonitor();
        if (primary_monitor)
        {
            // 获取显示器的工作区大小
            int workarea_x, workarea_y, workarea_width, workarea_height;
            glfwGetMonitorWorkarea(primary_monitor, &workarea_x, &workarea_y, &workarea_width, &workarea_height);

            // 获取显示器的分辨率
            const GLFWvidmode *mode = glfwGetVideoMode(primary_monitor);

            // 设置窗口的最小和最大大小
            ImVec2 min_window_size = ImVec2(400, 300);                                       // 最小窗口大小
            ImVec2 max_window_size = ImVec2(workarea_width * 0.8f, workarea_height * 0.8f);  // 最大窗口大小
            ImGui::SetNextWindowSizeConstraints(min_window_size, max_window_size);
        }

        // 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
        {
            ImGui::Begin("atom", nullptr, window_flags);  // Create a window called "Hello, world!" and append into it.
            auto str = "Atom";

            DrawTitleBar(str, window_is_open);

            static float left_pane_width = 200.0f;                                             // 初始左侧窗口宽度
            float        min_pane_width  = 100.0f;                                             // 最小窗口宽度
            float        max_pane_width  = ImGui::GetContentRegionAvail().x - min_pane_width;  // 最大窗口宽度

            static float right_pane_height = 200.0f;                                              // 初始右侧下窗口高度
            float        min_pane_height   = 100.0f;                                              // 最小窗口高度
            float        max_pane_height   = ImGui::GetContentRegionAvail().y - min_pane_height;  // 最大窗口高度

            ImGui::BeginGroup();  // 开始一个组
            // 左侧的可滑动列表
            ImGui::BeginChild("Left Pane", ImVec2(left_pane_width, 0), true, ImGuiWindowFlags_NoMove);
            static int                      selected_left = 0;
            static std::vector<std::string> items_left    = {"Item 1", "Item 2", "Item 3", "Item 4", "Item 5"};
            for (int i = 0; i < items_left.size(); i++)
            {
                if (ImGui::Selectable(items_left[i].c_str(), selected_left == i))
                    selected_left = i;
            }
            // 添加一个加号按钮
            if (ImGui::Button("+", ImVec2(ImGui::GetContentRegionAvail().x, 0)))
            {
                items_left.push_back("New Item " + std::to_string(items_left.size() + 1));
            }
            ImGui::EndChild();
            ImGui::EndGroup();  // 结束组

            ImGui::SameLine();

            ImGui::BeginGroup();
            // 分割器
            ImGui::InvisibleButton("splitter_vertical", ImVec2(4.0f, -1.0f));
            if (ImGui::IsItemHovered())
            {
                ImGui::SetMouseCursor(ImGuiMouseCursor_ResizeEW);  // 更改鼠标光标
            }
            if (ImGui::IsItemActive())
            {
                left_pane_width += ImGui::GetIO().MouseDelta.x;
                if (left_pane_width < min_pane_width)
                    left_pane_width = min_pane_width;
                if (left_pane_width > max_pane_width)
                    left_pane_width = max_pane_width;
            }
            ImGui::EndGroup();

            ImGui::SameLine();

            ImGui::BeginGroup();  // 开始一个组
            // 右侧的可滑动列表
            auto temp = ImGui::GetContentRegionAvail().y - right_pane_height - 12.0f;
            ImGui::BeginChild("Right Pane", ImVec2(0, temp), true, ImGuiWindowFlags_NoMove);
            static int               selected_right = 0;
            std::vector<std::string> items_right    = {"Item A", "Item B", "Item C", "Item D", "Item E"};
            for (int i = 0; i < items_right.size(); i++)
            {
                if (ImGui::Selectable(items_right[i].c_str(), selected_right == i, ImGuiSelectableFlags_AllowDoubleClick))
                    if (ImGui::IsItemHovered() && ImGui::IsMouseDoubleClicked(0))
                    {
                        // Do stuff on Selectable() double click.
                        selected_right = i;
                        ImGui::SetClipboardText(items_right[i].c_str());
                    }
                selected_right = -1;
            }
            ImGui::EndChild();

            // 分割器
            ImGui::InvisibleButton("splitter_horizontal", ImVec2(-1.0f, 4.0f));
            if (ImGui::IsItemHovered())
            {
                ImGui::SetMouseCursor(ImGuiMouseCursor_ResizeNS);  // 更改鼠标光标
            }
            if (ImGui::IsItemActive())
            {
                right_pane_height -= ImGui::GetIO().MouseDelta.y;
                if (right_pane_height < min_pane_height)
                    right_pane_height = min_pane_height;
                if (right_pane_height > max_pane_height)
                    right_pane_height = max_pane_height;
            }

            // 设置输入框高度
            ImGui::PushStyleVar(ImGuiStyleVar_FramePadding, ImVec2(4.0f, right_pane_height / 2.0f - ImGui::GetFontSize() / 2.0f));

            // 添加一个输入框
            static char input_text[1024] = "";
            ImGui::SetNextItemWidth(ImGui::GetContentRegionAvail().x);  // 设置输入框宽度
            ImGui::InputText("##input", input_text, IM_ARRAYSIZE(input_text), ImGuiInputTextFlags_EnterReturnsTrue);
            ImGui::PopStyleVar();  // 恢复默认样式
            ImGui::EndGroup();     // 结束组

            ImGui::End();
        }

        // Rendering
        ImGui::Render();
        ImDrawData *main_draw_data    = ImGui::GetDrawData();
        const bool  main_is_minimized = (main_draw_data->DisplaySize.x <= 0.0f || main_draw_data->DisplaySize.y <= 0.0f);
        if (!main_is_minimized)
            FrameRender(wd, main_draw_data);

        // Update and Render additional Platform Windows
        if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
        {
            ImGui::UpdatePlatformWindows();
            ImGui::RenderPlatformWindowsDefault();
        }

        // Present Main Platform Window
        if (!main_is_minimized)
            FramePresent(wd);
    }

    // Cleanup
    err = vkDeviceWaitIdle(g_Device);
    check_vk_result(err);
    ImGui_ImplVulkan_Shutdown();
    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();

    CleanupVulkanWindow();
    CleanupVulkan();

    glfwDestroyWindow(window);
    glfwTerminate();

    return 0;
}