// 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 <stdio.h> // printf, fprintf #include <stdlib.h> // abort #define GLFW_INCLUDE_NONE #define GLFW_INCLUDE_VULKAN #include <GLFW/glfw3.h> #include "imgui_impl_glfw_vulkan.h" #define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16 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 VkFormat g_Format = VK_FORMAT_B8G8R8A8_UNORM; static VkColorSpaceKHR g_ColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR; static VkImageSubresourceRange g_ImageRange = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1}; static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE; static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE; static int fb_width, fb_height; static uint32_t g_BackBufferIndex = 0; 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_Semaphore[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(GLFWwindow* /*window*/, 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_Format; info.imageColorSpace = g_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 = VK_PRESENT_MODE_FIFO_KHR; info.clipped = VK_TRUE; info.oldSwapchain = old_swapchain; VkSurfaceCapabilitiesKHR cap; err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_Gpu, g_Surface, &cap); check_vk_result(err); info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount; 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_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_COLOR_ATTACHMENT_OPTIMAL; 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; VkRenderPassCreateInfo info = {}; info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO; info.attachmentCount = 1; info.pAttachments = &attachment; info.subpassCount = 1; info.pSubpasses = &subpass; 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_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); } } } static void setup_vulkan(GLFWwindow* window) { VkResult err; // Create Vulkan Instance { uint32_t glfw_extensions_count; const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&glfw_extensions_count); VkInstanceCreateInfo create_info = {}; create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO; create_info.enabledExtensionCount = glfw_extensions_count; create_info.ppEnabledExtensionNames = glfw_extensions; err = vkCreateInstance(&create_info, g_Allocator, &g_Instance); check_vk_result(err); } // Create Window Surface { err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface); check_vk_result(err); } // Get GPU { uint32_t count = 1; err = vkEnumeratePhysicalDevices(g_Instance, &count, &g_Gpu); check_vk_result(err); } // 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_Semaphore[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_Semaphore[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); vkDestroyDevice(g_Device, g_Allocator); vkDestroyInstance(g_Instance, g_Allocator); } static void frame_begin() { VkResult err; while (true) { 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_Semaphore[g_FrameIndex], VK_NULL_HANDLE, &g_BackBufferIndex); 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_BackBufferIndex]; 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]); { VkImageMemoryBarrier barrier = {}; barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER; barrier.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT; barrier.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT; barrier.oldLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL; barrier.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR; barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED; barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED; barrier.image = g_BackBuffer[g_BackBufferIndex]; barrier.subresourceRange = g_ImageRange; vkCmdPipelineBarrier(g_CommandBuffer[g_FrameIndex], VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, NULL, 0, NULL, 1, &barrier); } { VkSubmitInfo info = {}; info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO; info.waitSemaphoreCount = 1; info.pWaitSemaphores = &g_Semaphore[g_FrameIndex]; info.commandBufferCount = 1; info.pCommandBuffers = &g_CommandBuffer[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); } { VkResult res; VkSwapchainKHR swapchains[1] = {g_Swapchain}; uint32_t indices[1] = {g_BackBufferIndex}; VkPresentInfoKHR info = {}; info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR; info.swapchainCount = 1; info.pSwapchains = swapchains; info.pImageIndices = indices; info.pResults = &res; err = vkQueuePresentKHR(g_Queue, &info); check_vk_result(err); check_vk_result(res); } g_FrameIndex = (g_FrameIndex) % IMGUI_VK_QUEUED_FRAMES; } static void error_callback(int error, const char* description) { fprintf(stderr, "Error %d: %s\n", error, description); } int main(int, char**) { // Setup window glfwSetErrorCallback(error_callback); if (!glfwInit()) return 1; glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API); GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui Vulkan example", NULL, NULL); // Setup Vulkan if (!glfwVulkanSupported()) { printf("GLFW: Vulkan Not Supported\n"); return 1; } setup_vulkan(window); // Setup ImGui binding 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; ImGui_ImplGlfwVulkan_Init(window, true, &init_data); // Load Fonts // (there is a default font, this is only if you want to change it. see extra_fonts/README.txt for more details) //ImGuiIO& io = ImGui::GetIO(); //io.Fonts->AddFontDefault(); //io.Fonts->AddFontFromFileTTF("../../extra_fonts/Cousine-Regular.ttf", 15.0f); //io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f); //io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f); //io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f); //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese()); // 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_test_window = true; bool show_another_window = false; ImVec4 clear_color = ImColor(114, 144, 154); // Main loop while (!glfwWindowShouldClose(window)) { glfwPollEvents(); ImGui_ImplGlfwVulkan_NewFrame(); // 1. Show a simple window // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug" { static float f = 0.0f; ImGui::Text("Hello, world!"); ImGui::SliderFloat("float", &f, 0.0f, 1.0f); ImGui::ColorEdit3("clear color", (float*)&clear_color); if (ImGui::Button("Test Window")) show_test_window ^= 1; if (ImGui::Button("Another Window")) show_another_window ^= 1; ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); } // 2. Show another simple window, this time using an explicit Begin/End pair if (show_another_window) { ImGui::SetNextWindowSize(ImVec2(200,100), ImGuiSetCond_FirstUseEver); ImGui::Begin("Another Window", &show_another_window); ImGui::Text("Hello"); ImGui::End(); } // 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow() if (show_test_window) { ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver); ImGui::ShowTestWindow(&show_test_window); } g_ClearValue.color.float32[0] = clear_color.x; g_ClearValue.color.float32[1] = clear_color.y; g_ClearValue.color.float32[2] = clear_color.z; g_ClearValue.color.float32[3] = clear_color.w; frame_begin(); ImGui_ImplGlfwVulkan_Render(g_CommandBuffer[g_FrameIndex]); frame_end(); } // Cleanup VkResult err = vkDeviceWaitIdle(g_Device); check_vk_result(err); ImGui_ImplGlfwVulkan_Shutdown(); cleanup_vulkan(); glfwTerminate(); return 0; }