Beispiel #1
0
static void setup_vulkan(GLFWwindow* window)
{
    VkResult err;

    // Create Vulkan Instance
    {
        uint32_t extensions_count;
        const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count);

        VkInstanceCreateInfo create_info = {};
        create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
        create_info.enabledExtensionCount = extensions_count;
        create_info.ppEnabledExtensionNames = glfw_extensions;

#ifdef IMGUI_VULKAN_DEBUG_REPORT
        // enabling multiple validation layers grouped as lunarg standard validation
        const char* layers[] = {"VK_LAYER_LUNARG_standard_validation"};
        create_info.enabledLayerCount = 1;
        create_info.ppEnabledLayerNames = layers;

        // need additional storage for char pointer to debug report extension
        const char** extensions = (const char**)malloc(sizeof(const char*) * (extensions_count + 1));
        for (size_t i = 0; i < extensions_count; i++)
            extensions[i] = glfw_extensions[i];
        extensions[ extensions_count ] = "VK_EXT_debug_report";
        create_info.enabledExtensionCount = extensions_count+1;
        create_info.ppEnabledExtensionNames = extensions;
#endif // IMGUI_VULKAN_DEBUG_REPORT

        err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
        check_vk_result(err);

#ifdef IMGUI_VULKAN_DEBUG_REPORT
        free(extensions);

        // create the debug report callback
        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 = NULL;
        
        // get the proc address of the function pointer, required for used extensions
        PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT = 
            (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");

        err = vkCreateDebugReportCallbackEXT( g_Instance, &debug_report_ci, g_Allocator, &g_Debug_Report );
        check_vk_result(err);
#endif // IMGUI_VULKAN_DEBUG_REPORT
    }

    // Create Window Surface
    {
        err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface);
        check_vk_result(err);
    }

    // Get GPU
    {
        uint32_t gpu_count;
        err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, NULL);
        check_vk_result(err);

        VkPhysicalDevice* gpus = (VkPhysicalDevice*)malloc(sizeof(VkPhysicalDevice) * gpu_count);
        err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
        check_vk_result(err);

        // If a number >1 of GPUs got reported, you should find the best fit GPU for your purpose
        // e.g. VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU if available, or with the greatest memory available, etc.
        // for sake of simplicity we'll just take the first one, assuming it has a graphics queue family.
        g_Gpu = gpus[0];
        free(gpus);
    }

    // Get queue
    {
        uint32_t count;
        vkGetPhysicalDeviceQueueFamilyProperties(g_Gpu, &count, NULL);
        VkQueueFamilyProperties* queues = (VkQueueFamilyProperties*)malloc(sizeof(VkQueueFamilyProperties) * count);
        vkGetPhysicalDeviceQueueFamilyProperties(g_Gpu, &count, queues);
        for (uint32_t i = 0; i < count; i++)
        {
            if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
            {
                g_QueueFamily = i;
                break;
            }
        }
        free(queues);
    }

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

    // Get Surface Format
    {
        // Per Spec Format and View Format are expected to be the same unless VK_IMAGE_CREATE_MUTABLE_BIT was set at image creation
        // Assuming that the default behavior is without setting this bit, there is no need for separate Spawchain image and image view format
        // additionally several new color spaces were introduced with Vulkan Spec v1.0.40
        // hence we must make sure that a format with the mostly available color space, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR, is found and used
        uint32_t count;
        vkGetPhysicalDeviceSurfaceFormatsKHR(g_Gpu, g_Surface, &count, NULL);
        VkSurfaceFormatKHR *formats = (VkSurfaceFormatKHR*)malloc(sizeof(VkSurfaceFormatKHR) * count);
        vkGetPhysicalDeviceSurfaceFormatsKHR(g_Gpu, g_Surface, &count, formats);

        // first check if only one format, VK_FORMAT_UNDEFINED, is available, which would imply that any format is available
        if (count == 1)
        {
            if( formats[0].format == VK_FORMAT_UNDEFINED )
            {
                g_SurfaceFormat.format = VK_FORMAT_B8G8R8A8_UNORM;
                g_SurfaceFormat.colorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
            }
            else
            {   // no point in searching another format
                g_SurfaceFormat = formats[0];
            }
        }
        else
        {
            // request several formats, the first found will be used 
            VkFormat requestSurfaceImageFormat[] = {VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM};
            VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
            bool requestedFound = false;
            for (size_t i = 0; i < sizeof(requestSurfaceImageFormat) / sizeof(requestSurfaceImageFormat[0]); i++)
            {
                if( requestedFound ) {
                    break;
                }
                for (uint32_t j = 0; j < count; j++)
                {
                    if (formats[j].format == requestSurfaceImageFormat[i] && formats[j].colorSpace == requestSurfaceColorSpace)
                    {
                        g_SurfaceFormat = formats[j];
                        requestedFound = true;
                    }
                }
            }

            // if none of the requested image formats could be found, use the first available
            if (!requestedFound)
                g_SurfaceFormat = formats[0];
        }
        free(formats);
    }


    // Get Present Mode
    {
        // Requst a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
#ifdef IMGUI_UNLIMITED_FRAME_RATE
        g_PresentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
#else
        g_PresentMode = VK_PRESENT_MODE_FIFO_KHR;
#endif
        uint32_t count = 0;
        vkGetPhysicalDeviceSurfacePresentModesKHR(g_Gpu, g_Surface, &count, nullptr);
        VkPresentModeKHR* presentModes = (VkPresentModeKHR*)malloc(sizeof(VkQueueFamilyProperties) * count);
        vkGetPhysicalDeviceSurfacePresentModesKHR(g_Gpu, g_Surface, &count, presentModes);
        bool presentModeAvailable = false;
        for (size_t i = 0; i < count; i++) 
        {
            if (presentModes[i] == g_PresentMode)
            {
                presentModeAvailable = true;
                break;
            }
        }
        if( !presentModeAvailable )
            g_PresentMode = VK_PRESENT_MODE_FIFO_KHR;   // always available
    }


    // Create Logical Device
    {
        int device_extension_count = 1;
        const char* device_extensions[] = {"VK_KHR_swapchain"};
        const uint32_t queue_index = 0;
        const uint32_t queue_count = 1;
        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 = queue_count;
        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 = device_extension_count;
        create_info.ppEnabledExtensionNames = device_extensions;
        err = vkCreateDevice(g_Gpu, &create_info, g_Allocator, &g_Device);
        check_vk_result(err);
        vkGetDeviceQueue(g_Device, g_QueueFamily, queue_index, &g_Queue);
    }

    // Create Framebuffers
    {
        int w, h;
        glfwGetFramebufferSize(window, &w, &h);
        resize_vulkan(window, w, h);
        glfwSetFramebufferSizeCallback(window, resize_vulkan);
    }

    // Create Command Buffers
    for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
    {
        {
            VkCommandPoolCreateInfo info = {};
            info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
            info.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
            info.queueFamilyIndex = g_QueueFamily;
            err = vkCreateCommandPool(g_Device, &info, g_Allocator, &g_CommandPool[i]);
            check_vk_result(err);
        }
        {
            VkCommandBufferAllocateInfo info = {};
            info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
            info.commandPool = g_CommandPool[i];
            info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
            info.commandBufferCount = 1;
            err = vkAllocateCommandBuffers(g_Device, &info, &g_CommandBuffer[i]);
            check_vk_result(err);
        }
        {
            VkFenceCreateInfo info = {};
            info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
            info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
            err = vkCreateFence(g_Device, &info, g_Allocator, &g_Fence[i]);
            check_vk_result(err);
        }
        {
            VkSemaphoreCreateInfo info = {};
            info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
            err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_PresentCompleteSemaphore[i]);
            check_vk_result(err);
            err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_RenderCompleteSemaphore[i]);
            check_vk_result(err);
        }
    }

    // Create Descriptor Pool
    {
        VkDescriptorPoolSize pool_size[11] =
        {
            { VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
            { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
            { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
            { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
            { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
            { VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
        };
        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 = 1000 * 11;
        pool_info.poolSizeCount = 11;
        pool_info.pPoolSizes = pool_size;
        err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
        check_vk_result(err);
    }
}
Beispiel #2
0
int main(int, char**)
{
    // Setup window
    glfwSetErrorCallback(glfw_error_callback);
    if (!glfwInit())
        return 1;

    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
    GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui GLFW+Vulkan example", NULL, NULL);

    // Setup Vulkan
    if (!glfwVulkanSupported())
    {
        printf("GLFW: Vulkan Not Supported\n");
        return 1;
    }
    setup_vulkan(window);
    glfwSetFramebufferSizeCallback(window, glfw_resize_callback);

    // Setup ImGui binding
    ImGui::CreateContext();
    ImGuiIO& io = ImGui::GetIO(); (void)io;
    ImGui_ImplGlfwVulkan_Init_Data init_data = {};
    init_data.allocator = g_Allocator;
    init_data.gpu = g_Gpu;
    init_data.device = g_Device;
    init_data.render_pass = g_RenderPass;
    init_data.pipeline_cache = g_PipelineCache;
    init_data.descriptor_pool = g_DescriptorPool;
    init_data.check_vk_result = check_vk_result;

    //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;  // Enable Keyboard Controls
    ImGui_ImplGlfwVulkan_Init(window, true, &init_data);

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

    // Load Fonts
    // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them. 
    // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple. 
    // - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
    // - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
    // - Read 'misc/fonts/README.txt' for more instructions and details.
    // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
    //io.Fonts->AddFontDefault();
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
    //io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
    //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
    //IM_ASSERT(font != NULL);

    // Upload Fonts
    {
        VkResult err;
        err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 0);
        check_vk_result(err);
        VkCommandBufferBeginInfo begin_info = {};
        begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
        begin_info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
        err = vkBeginCommandBuffer(g_CommandBuffer[g_FrameIndex], &begin_info);
        check_vk_result(err);

        ImGui_ImplGlfwVulkan_CreateFontsTexture(g_CommandBuffer[g_FrameIndex]);

        VkSubmitInfo end_info = {};
        end_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
        end_info.commandBufferCount = 1;
        end_info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex];
        err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]);
        check_vk_result(err);
        err = vkQueueSubmit(g_Queue, 1, &end_info, VK_NULL_HANDLE);
        check_vk_result(err);

        err = vkDeviceWaitIdle(g_Device);
        check_vk_result(err);
        ImGui_ImplGlfwVulkan_InvalidateFontUploadObjects();
    }

    bool show_demo_window = true;
    bool show_another_window = false;
    ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);


    // Main loop
    while (!glfwWindowShouldClose(window))
    {
        // 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.
        // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
        // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
        glfwPollEvents();

        if (g_ResizeWanted)
            resize_vulkan(g_ResizeWidth, g_ResizeHeight);
        g_ResizeWanted = false;

        ImGui_ImplGlfwVulkan_NewFrame();

        // 1. Show a simple window.
        // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
        {
            static float f = 0.0f;
            static int counter = 0;
            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
            ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color

            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
            ImGui::Checkbox("Another Window", &show_another_window);

            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
                counter++;
            ImGui::SameLine();
            ImGui::Text("counter = %d", counter);

            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
        }

        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
        if (show_another_window)
        {
            ImGui::Begin("Another Window", &show_another_window);
            ImGui::Text("Hello from another window!");
            if (ImGui::Button("Close Me"))
                show_another_window = false;
            ImGui::End();
        }

        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
        if (show_demo_window)
        {
            ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
            ImGui::ShowDemoWindow(&show_demo_window);
        }

        memcpy(&g_ClearValue.color.float32[0], &clear_color, 4 * sizeof(float));
        frame_begin();
        ImGui_ImplGlfwVulkan_Render(g_CommandBuffer[g_FrameIndex]);
        frame_end();
        frame_present();
    }

    // Cleanup
    VkResult err = vkDeviceWaitIdle(g_Device);
    check_vk_result(err);
    ImGui_ImplGlfwVulkan_Shutdown();
    ImGui::DestroyContext();
    cleanup_vulkan();
    glfwTerminate();

    return 0;
}