| // ImGui - standalone example application for Glfw + Vulkan, using programmable pipeline |
| // If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp. |
| |
| #include "imgui.h" |
| #include "imgui_impl_glfw_vulkan.h" |
| |
| #include <stdio.h> // printf, fprintf |
| #include <stdlib.h> // abort |
| #define GLFW_INCLUDE_NONE |
| #define GLFW_INCLUDE_VULKAN |
| #include <GLFW/glfw3.h> |
| |
| #define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16 |
| //#define IMGUI_UNLIMITED_FRAME_RATE |
| #ifdef _DEBUG |
| #define IMGUI_VULKAN_DEBUG_REPORT |
| #endif |
| |
| static VkAllocationCallbacks* g_Allocator = NULL; |
| static VkInstance g_Instance = VK_NULL_HANDLE; |
| static VkSurfaceKHR g_Surface = VK_NULL_HANDLE; |
| static VkPhysicalDevice g_Gpu = VK_NULL_HANDLE; |
| static VkDevice g_Device = VK_NULL_HANDLE; |
| static VkSwapchainKHR g_Swapchain = VK_NULL_HANDLE; |
| static VkRenderPass g_RenderPass = VK_NULL_HANDLE; |
| static uint32_t g_QueueFamily = 0; |
| static VkQueue g_Queue = VK_NULL_HANDLE; |
| static VkDebugReportCallbackEXT g_Debug_Report = VK_NULL_HANDLE; |
| |
| static VkSurfaceFormatKHR g_SurfaceFormat; |
| static VkImageSubresourceRange g_ImageRange = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1}; |
| static VkPresentModeKHR g_PresentMode; |
| |
| static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE; |
| static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE; |
| |
| static int fb_width = 0, fb_height = 0; |
| static bool g_ResizeWanted = false; |
| static int g_ResizeWidth = 0, g_ResizeHeight = 0; |
| static uint32_t g_BackbufferIndices[IMGUI_VK_QUEUED_FRAMES]; // keep track of recently rendered swapchain frame indices |
| static uint32_t g_BackBufferCount = 0; |
| static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {}; |
| static VkImageView g_BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {}; |
| static VkFramebuffer g_Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {}; |
| |
| static uint32_t g_FrameIndex = 0; |
| static VkCommandPool g_CommandPool[IMGUI_VK_QUEUED_FRAMES]; |
| static VkCommandBuffer g_CommandBuffer[IMGUI_VK_QUEUED_FRAMES]; |
| static VkFence g_Fence[IMGUI_VK_QUEUED_FRAMES]; |
| static VkSemaphore g_PresentCompleteSemaphore[IMGUI_VK_QUEUED_FRAMES]; |
| static VkSemaphore g_RenderCompleteSemaphore[IMGUI_VK_QUEUED_FRAMES]; |
| |
| static VkClearValue g_ClearValue = {}; |
| |
| static void check_vk_result(VkResult err) |
| { |
| if (err == 0) return; |
| printf("VkResult %d\n", err); |
| if (err < 0) |
| abort(); |
| } |
| |
| static void resize_vulkan(int w, int h) |
| { |
| VkResult err; |
| VkSwapchainKHR old_swapchain = g_Swapchain; |
| err = vkDeviceWaitIdle(g_Device); |
| check_vk_result(err); |
| |
| // Destroy old Framebuffer: |
| for (uint32_t i = 0; i < g_BackBufferCount; i++) |
| if (g_BackBufferView[i]) |
| vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); |
| for (uint32_t i = 0; i < g_BackBufferCount; i++) |
| if (g_Framebuffer[i]) |
| vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); |
| if (g_RenderPass) |
| vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); |
| |
| // Create Swapchain: |
| { |
| VkSwapchainCreateInfoKHR info = {}; |
| info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR; |
| info.surface = g_Surface; |
| info.imageFormat = g_SurfaceFormat.format; |
| info.imageColorSpace = g_SurfaceFormat.colorSpace; |
| info.imageArrayLayers = 1; |
| info.imageUsage |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT; |
| info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; |
| info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR; |
| info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR; |
| info.presentMode = g_PresentMode; |
| info.clipped = VK_TRUE; |
| info.oldSwapchain = old_swapchain; |
| VkSurfaceCapabilitiesKHR cap; |
| err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_Gpu, g_Surface, &cap); |
| check_vk_result(err); |
| if (cap.maxImageCount > 0) |
| info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount; |
| else |
| info.minImageCount = cap.minImageCount + 2; |
| |
| if (cap.currentExtent.width == 0xffffffff) |
| { |
| fb_width = w; |
| fb_height = h; |
| info.imageExtent.width = fb_width; |
| info.imageExtent.height = fb_height; |
| } |
| else |
| { |
| fb_width = cap.currentExtent.width; |
| fb_height = cap.currentExtent.height; |
| info.imageExtent.width = fb_width; |
| info.imageExtent.height = fb_height; |
| } |
| err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &g_Swapchain); |
| check_vk_result(err); |
| err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, NULL); |
| check_vk_result(err); |
| err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, g_BackBuffer); |
| check_vk_result(err); |
| } |
| if (old_swapchain) |
| vkDestroySwapchainKHR(g_Device, old_swapchain, g_Allocator); |
| |
| // Create the Render Pass: |
| { |
| VkAttachmentDescription attachment = {}; |
| attachment.format = g_SurfaceFormat.format; |
| attachment.samples = VK_SAMPLE_COUNT_1_BIT; |
| attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR; |
| attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE; |
| attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE; |
| attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE; |
| attachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED; |
| attachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR; |
| VkAttachmentReference color_attachment = {}; |
| color_attachment.attachment = 0; |
| color_attachment.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL; |
| VkSubpassDescription subpass = {}; |
| subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS; |
| subpass.colorAttachmentCount = 1; |
| subpass.pColorAttachments = &color_attachment; |
| VkSubpassDependency dependency = {}; |
| dependency.srcSubpass = VK_SUBPASS_EXTERNAL; |
| dependency.dstSubpass = 0; |
| dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; |
| dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; |
| dependency.srcAccessMask = 0; |
| dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT; |
| VkRenderPassCreateInfo info = {}; |
| info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO; |
| info.attachmentCount = 1; |
| info.pAttachments = &attachment; |
| info.subpassCount = 1; |
| info.pSubpasses = &subpass; |
| info.dependencyCount = 1; |
| info.pDependencies = &dependency; |
| err = vkCreateRenderPass(g_Device, &info, g_Allocator, &g_RenderPass); |
| check_vk_result(err); |
| } |
| |
| // Create The Image Views |
| { |
| VkImageViewCreateInfo info = {}; |
| info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO; |
| info.viewType = VK_IMAGE_VIEW_TYPE_2D; |
| info.format = g_SurfaceFormat.format; |
| info.components.r = VK_COMPONENT_SWIZZLE_R; |
| info.components.g = VK_COMPONENT_SWIZZLE_G; |
| info.components.b = VK_COMPONENT_SWIZZLE_B; |
| info.components.a = VK_COMPONENT_SWIZZLE_A; |
| info.subresourceRange = g_ImageRange; |
| for (uint32_t i = 0; i < g_BackBufferCount; i++) |
| { |
| info.image = g_BackBuffer[i]; |
| err = vkCreateImageView(g_Device, &info, g_Allocator, &g_BackBufferView[i]); |
| check_vk_result(err); |
| } |
| } |
| |
| // Create Framebuffer: |
| { |
| VkImageView attachment[1]; |
| VkFramebufferCreateInfo info = {}; |
| info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO; |
| info.renderPass = g_RenderPass; |
| info.attachmentCount = 1; |
| info.pAttachments = attachment; |
| info.width = fb_width; |
| info.height = fb_height; |
| info.layers = 1; |
| for (uint32_t i = 0; i < g_BackBufferCount; i++) |
| { |
| attachment[0] = g_BackBufferView[i]; |
| err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &g_Framebuffer[i]); |
| check_vk_result(err); |
| } |
| } |
| } |
| |
| #ifdef IMGUI_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)pUserData; (void)pLayerPrefix; (void)messageCode; (void)location; |
| printf("[vulkan] ObjectType: %i\nMessage: %s\n\n", objectType, pMessage ); |
| return VK_FALSE; |
| } |
| #endif // IMGUI_VULKAN_DEBUG_REPORT |
| |
| 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 |
| { |
| // Request 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_MAILBOX_KHR; //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(w, h); |
| } |
| |
| // 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); |
| } |
| } |
| |
| static void cleanup_vulkan() |
| { |
| vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator); |
| for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) |
| { |
| vkDestroyFence(g_Device, g_Fence[i], g_Allocator); |
| vkFreeCommandBuffers(g_Device, g_CommandPool[i], 1, &g_CommandBuffer[i]); |
| vkDestroyCommandPool(g_Device, g_CommandPool[i], g_Allocator); |
| vkDestroySemaphore(g_Device, g_PresentCompleteSemaphore[i], g_Allocator); |
| vkDestroySemaphore(g_Device, g_RenderCompleteSemaphore[i], g_Allocator); |
| } |
| for (uint32_t i = 0; i < g_BackBufferCount; i++) |
| { |
| vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); |
| vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); |
| } |
| vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); |
| vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator); |
| vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator); |
| |
| #ifdef IMGUI_VULKAN_DEBUG_REPORT |
| // get the proc address of the function pointer, required for used extensions |
| auto vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT"); |
| vkDestroyDebugReportCallbackEXT(g_Instance, g_Debug_Report, g_Allocator); |
| #endif // IMGUI_VULKAN_DEBUG_REPORT |
| |
| vkDestroyDevice(g_Device, g_Allocator); |
| vkDestroyInstance(g_Instance, g_Allocator); |
| } |
| |
| static void frame_begin() |
| { |
| VkResult err; |
| for (;;) |
| { |
| err = vkWaitForFences(g_Device, 1, &g_Fence[g_FrameIndex], VK_TRUE, 100); |
| if (err == VK_SUCCESS) break; |
| if (err == VK_TIMEOUT) continue; |
| check_vk_result(err); |
| } |
| { |
| err = vkAcquireNextImageKHR(g_Device, g_Swapchain, UINT64_MAX, g_PresentCompleteSemaphore[g_FrameIndex], VK_NULL_HANDLE, &g_BackbufferIndices[g_FrameIndex]); |
| check_vk_result(err); |
| } |
| { |
| err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 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(g_CommandBuffer[g_FrameIndex], &info); |
| check_vk_result(err); |
| } |
| { |
| VkRenderPassBeginInfo info = {}; |
| info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO; |
| info.renderPass = g_RenderPass; |
| info.framebuffer = g_Framebuffer[g_BackbufferIndices[g_FrameIndex]]; |
| info.renderArea.extent.width = fb_width; |
| info.renderArea.extent.height = fb_height; |
| info.clearValueCount = 1; |
| info.pClearValues = &g_ClearValue; |
| vkCmdBeginRenderPass(g_CommandBuffer[g_FrameIndex], &info, VK_SUBPASS_CONTENTS_INLINE); |
| } |
| } |
| |
| static void frame_end() |
| { |
| VkResult err; |
| vkCmdEndRenderPass(g_CommandBuffer[g_FrameIndex]); |
| { |
| VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; |
| VkSubmitInfo info = {}; |
| info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO; |
| info.waitSemaphoreCount = 1; |
| info.pWaitSemaphores = &g_PresentCompleteSemaphore[g_FrameIndex]; |
| info.pWaitDstStageMask = &wait_stage; |
| info.commandBufferCount = 1; |
| info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex]; |
| info.signalSemaphoreCount = 1; |
| info.pSignalSemaphores = &g_RenderCompleteSemaphore[g_FrameIndex]; |
| |
| err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]); |
| check_vk_result(err); |
| err = vkResetFences(g_Device, 1, &g_Fence[g_FrameIndex]); |
| check_vk_result(err); |
| err = vkQueueSubmit(g_Queue, 1, &info, g_Fence[g_FrameIndex]); |
| check_vk_result(err); |
| } |
| } |
| |
| static void frame_present() |
| { |
| VkResult err; |
| VkSwapchainKHR swapchains[1] = {g_Swapchain}; |
| uint32_t indices[1] = {g_BackbufferIndices[g_FrameIndex]}; |
| VkPresentInfoKHR info = {}; |
| info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR; |
| info.waitSemaphoreCount = 1; |
| info.pWaitSemaphores = &g_RenderCompleteSemaphore[g_FrameIndex]; |
| info.swapchainCount = 1; |
| info.pSwapchains = swapchains; |
| info.pImageIndices = indices; |
| err = vkQueuePresentKHR(g_Queue, &info); |
| check_vk_result(err); |
| |
| g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES; |
| } |
| |
| static void glfw_error_callback(int error, const char* description) |
| { |
| fprintf(stderr, "Error %d: %s\n", error, description); |
| } |
| |
| static void glfw_resize_callback(GLFWwindow*, int w, int h) |
| { |
| g_ResizeWanted = true; |
| g_ResizeWidth = w; |
| g_ResizeHeight = h; |
| } |
| |
| 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 Dear ImGui binding |
| IMGUI_CHECKVERSION(); |
| 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(); |
| |
| glfwDestroyWindow(window); |
| glfwTerminate(); |
| |
| return 0; |
| } |
