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Diffstat (limited to 'imgui-1.92.1/examples/example_sdl3_vulkan/main.cpp')
| -rw-r--r-- | imgui-1.92.1/examples/example_sdl3_vulkan/main.cpp | 558 |
1 files changed, 0 insertions, 558 deletions
diff --git a/imgui-1.92.1/examples/example_sdl3_vulkan/main.cpp b/imgui-1.92.1/examples/example_sdl3_vulkan/main.cpp deleted file mode 100644 index df7f5ef..0000000 --- a/imgui-1.92.1/examples/example_sdl3_vulkan/main.cpp +++ /dev/null @@ -1,558 +0,0 @@ -// Dear ImGui: standalone example application for SDL3 + 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_sdl3.h" -#include "imgui_impl_vulkan.h" -#include <stdio.h> // printf, fprintf -#include <stdlib.h> // abort -#include <SDL3/SDL.h> -#include <SDL3/SDL_vulkan.h> - -// This example doesn't compile with Emscripten yet! Awaiting SDL3 support. -#ifdef __EMSCRIPTEN__ -#include "../libs/emscripten/emscripten_mainloop_stub.h" -#endif - -// Volk headers -#ifdef IMGUI_IMPL_VULKAN_USE_VOLK -#define VOLK_IMPLEMENTATION -#include <volk.h> -#endif - -//#define APP_USE_UNLIMITED_FRAME_RATE -#ifdef _DEBUG -#define APP_USE_VULKAN_DEBUG_REPORT -static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE; -#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 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 == VK_SUCCESS) - 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 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 = ImGui_ImplVulkanH_SelectPhysicalDevice(g_Instance); - IM_ASSERT(g_PhysicalDevice != VK_NULL_HANDLE); - - // Select graphics queue family - g_QueueFamily = ImGui_ImplVulkanH_SelectQueueFamilyIndex(g_PhysicalDevice); - 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 - // If you wish to load e.g. additional textures you may need to alter pools sizes and maxSets. - { - VkDescriptorPoolSize pool_sizes[] = - { - { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, IMGUI_IMPL_VULKAN_MINIMUM_IMAGE_SAMPLER_POOL_SIZE }, - }; - 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 = 0; - for (VkDescriptorPoolSize& pool_size : pool_sizes) - pool_info.maxSets += pool_size.descriptorCount; - 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) -{ - VkSemaphore image_acquired_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].ImageAcquiredSemaphore; - VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore; - VkResult 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; - if (err == VK_ERROR_OUT_OF_DATE_KHR) - return; - if (err != VK_SUBOPTIMAL_KHR) - 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; - if (err == VK_ERROR_OUT_OF_DATE_KHR) - return; - if (err != VK_SUBOPTIMAL_KHR) - 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**) -{ - // Setup SDL - // [If using SDL_MAIN_USE_CALLBACKS: all code below until the main loop starts would likely be your SDL_AppInit() function] - if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMEPAD)) - { - printf("Error: SDL_Init(): %s\n", SDL_GetError()); - return -1; - } - - // Create window with Vulkan graphics context - float main_scale = SDL_GetDisplayContentScale(SDL_GetPrimaryDisplay()); - SDL_WindowFlags window_flags = SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIDDEN | SDL_WINDOW_HIGH_PIXEL_DENSITY; - SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+Vulkan example", (int)(1280 * main_scale), (int)(720 * main_scale), window_flags); - if (window == nullptr) - { - printf("Error: SDL_CreateWindow(): %s\n", SDL_GetError()); - return -1; - } - - ImVector<const char*> extensions; - { - uint32_t sdl_extensions_count = 0; - const char* const* sdl_extensions = SDL_Vulkan_GetInstanceExtensions(&sdl_extensions_count); - for (uint32_t n = 0; n < sdl_extensions_count; n++) - extensions.push_back(sdl_extensions[n]); - } - SetupVulkan(extensions); - - // Create Window Surface - VkSurfaceKHR surface; - VkResult err; - if (SDL_Vulkan_CreateSurface(window, g_Instance, g_Allocator, &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); - SDL_SetWindowPosition(window, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED); - SDL_ShowWindow(window); - - // 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 scaling - ImGuiStyle& style = ImGui::GetStyle(); - style.ScaleAllSizes(main_scale); // Bake a fixed style scale. (until we have a solution for dynamic style scaling, changing this requires resetting Style + calling this again) - style.FontScaleDpi = main_scale; // Set initial font scale. (using io.ConfigDpiScaleFonts=true makes this unnecessary. We leave both here for documentation purpose) - - // Setup Platform/Renderer backends - ImGui_ImplSDL3_InitForVulkan(window); - ImGui_ImplVulkan_InitInfo init_info = {}; - //init_info.ApiVersion = VK_API_VERSION_1_3; // Pass in your value of VkApplicationInfo::apiVersion, otherwise will default to header version. - 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 - // - 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). - // - 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 \\ ! - //style.FontSizeBase = 20.0f; - //io.Fonts->AddFontDefault(); - //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf"); - //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf"); - //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf"); - //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf"); - //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf"); - //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. - // [If using SDL_MAIN_USE_CALLBACKS: call ImGui_ImplSDL3_ProcessEvent() from your SDL_AppEvent() function] - SDL_Event event; - while (SDL_PollEvent(&event)) - { - ImGui_ImplSDL3_ProcessEvent(&event); - if (event.type == SDL_EVENT_QUIT) - done = true; - if (event.type == SDL_EVENT_WINDOW_CLOSE_REQUESTED && event.window.windowID == SDL_GetWindowID(window)) - done = true; - } - - // [If using SDL_MAIN_USE_CALLBACKS: all code below would likely be your SDL_AppIterate() function] - if (SDL_GetWindowFlags(window) & SDL_WINDOW_MINIMIZED) - { - SDL_Delay(10); - continue; - } - - // Resize swap chain? - int fb_width, fb_height; - SDL_GetWindowSize(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; - } - - // Start the Dear ImGui frame - ImGui_ImplVulkan_NewFrame(); - ImGui_ImplSDL3_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 - // [If using SDL_MAIN_USE_CALLBACKS: all code below would likely be your SDL_AppQuit() function] - err = vkDeviceWaitIdle(g_Device); - check_vk_result(err); - ImGui_ImplVulkan_Shutdown(); - ImGui_ImplSDL3_Shutdown(); - ImGui::DestroyContext(); - - CleanupVulkanWindow(); - CleanupVulkan(); - - SDL_DestroyWindow(window); - SDL_Quit(); - - return 0; -} |