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Diffstat (limited to 'src/imgui/examples/example_sdl2_vulkan/main.cpp')
| -rw-r--r-- | src/imgui/examples/example_sdl2_vulkan/main.cpp | 570 |
1 files changed, 570 insertions, 0 deletions
diff --git a/src/imgui/examples/example_sdl2_vulkan/main.cpp b/src/imgui/examples/example_sdl2_vulkan/main.cpp new file mode 100644 index 0000000..bbd9eec --- /dev/null +++ b/src/imgui/examples/example_sdl2_vulkan/main.cpp @@ -0,0 +1,570 @@ +// Dear ImGui: standalone example application for SDL2 + 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 "imgui.h" +#include "imgui_impl_sdl2.h" +#include "imgui_impl_vulkan.h" +#include <stdio.h> // printf, fprintf +#include <stdlib.h> // abort +#include <SDL.h> +#include <SDL_vulkan.h> +#include <vulkan/vulkan.h> +//#include <vulkan/vulkan_beta.h> + +//#define IMGUI_UNLIMITED_FRAME_RATE +#ifdef _DEBUG +#define IMGUI_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 uint32_t g_MinImageCount = 2; +static bool g_SwapChainRebuild = false; + +static void check_vk_result(VkResult err) +{ + if (err == 0) + return; + fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err); + if (err < 0) + abort(); +} + +#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)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 // IMGUI_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; + + // 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 IMGUI_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); + + // Setup the debug report callback +#ifdef IMGUI_VULKAN_DEBUG_REPORT + auto vkCreateDebugReportCallbackEXT = (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT"); + IM_ASSERT(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 = 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 IMGUI_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 IMGUI_VULKAN_DEBUG_REPORT + // Remove the debug report callback + auto vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT"); + vkDestroyDebugReportCallbackEXT(g_Instance, g_DebugReport, g_Allocator); +#endif // IMGUI_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->ImageCount; // Now we can use the next set of semaphores +} + +// Main code +int main(int, char**) +{ + // Setup SDL + if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER | SDL_INIT_GAMECONTROLLER) != 0) + { + printf("Error: %s\n", SDL_GetError()); + return -1; + } + + // From 2.0.18: Enable native IME. +#ifdef SDL_HINT_IME_SHOW_UI + SDL_SetHint(SDL_HINT_IME_SHOW_UI, "1"); +#endif + + // Create window with Vulkan graphics context + SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI); + SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, window_flags); + if (window == nullptr) + { + printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError()); + return -1; + } + + ImVector<const char*> extensions; + uint32_t extensions_count = 0; + SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, nullptr); + extensions.resize(extensions_count); + SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, extensions.Data); + SetupVulkan(extensions); + + // Create Window Surface + VkSurfaceKHR surface; + VkResult err; + if (SDL_Vulkan_CreateSurface(window, g_Instance, &surface) == 0) + { + printf("Failed to create Vulkan surface.\n"); + return 1; + } + + // Create Framebuffers + int w, h; + SDL_GetWindowSize(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 + + // Setup Dear ImGui style + ImGui::StyleColorsDark(); + //ImGui::StyleColorsLight(); + + // Setup Platform/Renderer backends + ImGui_ImplSDL2_InitForVulkan(window); + 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.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, wd->RenderPass); + + // 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 a nullptr. 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. + // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use Freetype for higher quality font rendering. + // - Read 'docs/FONTS.md' 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("c:\\Windows\\Fonts\\segoeui.ttf", 18.0f); + //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f); + //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f); + //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f); + //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, nullptr, io.Fonts->GetGlyphRangesJapanese()); + //IM_ASSERT(font != nullptr); + + // Our state + bool show_demo_window = true; + bool show_another_window = false; + ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); + + // Main loop + bool done = false; + while (!done) + { + // 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. + SDL_Event event; + while (SDL_PollEvent(&event)) + { + ImGui_ImplSDL2_ProcessEvent(&event); + if (event.type == SDL_QUIT) + done = true; + if (event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == SDL_GetWindowID(window)) + done = true; + } + + // Resize swap chain? + if (g_SwapChainRebuild) + { + int width, height; + SDL_GetWindowSize(window, &width, &height); + if (width > 0 && height > 0) + { + ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount); + ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, &g_MainWindowData, g_QueueFamily, g_Allocator, width, height, g_MinImageCount); + g_MainWindowData.FrameIndex = 0; + g_SwapChainRebuild = false; + } + } + + // Start the Dear ImGui frame + ImGui_ImplVulkan_NewFrame(); + ImGui_ImplSDL2_NewFrame(); + ImGui::NewFrame(); + + // 1. Show the big demo window (Most of the sample code is in ImGui::ShowDemoWindow()! You can browse its code to learn more about Dear ImGui!). + if (show_demo_window) + ImGui::ShowDemoWindow(&show_demo_window); + + // 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window. + { + static float f = 0.0f; + static int counter = 0; + + ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it. + + ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too) + ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state + ImGui::Checkbox("Another Window", &show_another_window); + + 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 + + if (ImGui::Button("Button")) // Buttons return true when clicked (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 / io.Framerate, io.Framerate); + ImGui::End(); + } + + // 3. Show another simple window. + if (show_another_window) + { + ImGui::Begin("Another Window", &show_another_window); // Pass a pointer to our bool variable (the window will have a closing button that will clear the bool when clicked) + ImGui::Text("Hello from another window!"); + if (ImGui::Button("Close Me")) + show_another_window = false; + ImGui::End(); + } + + // Rendering + ImGui::Render(); + ImDrawData* draw_data = ImGui::GetDrawData(); + const bool is_minimized = (draw_data->DisplaySize.x <= 0.0f || draw_data->DisplaySize.y <= 0.0f); + if (!is_minimized) + { + wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w; + wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w; + wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w; + wd->ClearValue.color.float32[3] = clear_color.w; + FrameRender(wd, draw_data); + FramePresent(wd); + } + } + + // Cleanup + err = vkDeviceWaitIdle(g_Device); + check_vk_result(err); + ImGui_ImplVulkan_Shutdown(); + ImGui_ImplSDL2_Shutdown(); + ImGui::DestroyContext(); + + CleanupVulkanWindow(); + CleanupVulkan(); + + SDL_DestroyWindow(window); + SDL_Quit(); + + return 0; +} |