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ShaderPlayground / deps / imgui / imgui / examples / example_glfw_vulkan / main.cpp
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1// Dear ImGui: standalone example application for Glfw + Vulkan
2
3// Learn about Dear ImGui:
4// - FAQ https://dearimgui.com/faq
5// - Getting Started https://dearimgui.com/getting-started
6// - Documentation https://dearimgui.com/docs (same as your local docs/ folder).
7// - Introduction, links and more at the top of imgui.cpp
8
9// Important note to the reader who wish to integrate imgui_impl_vulkan.cpp/.h in their own engine/app.
10// - Common ImGui_ImplVulkan_XXX functions and structures are used to interface with imgui_impl_vulkan.cpp/.h.
11// You will use those if you want to use this rendering backend in your engine/app.
12// - Helper ImGui_ImplVulkanH_XXX functions and structures are only used by this example (main.cpp) and by
13// the backend itself (imgui_impl_vulkan.cpp), but should PROBABLY NOT be used by your own engine/app code.
14// Read comments in imgui_impl_vulkan.h.
15
16#include "imgui.h"
17#include "imgui_impl_glfw.h"
18#include "imgui_impl_vulkan.h"
19#include <stdio.h> // printf, fprintf
20#include <stdlib.h> // abort
21#define GLFW_INCLUDE_NONE
22#define GLFW_INCLUDE_VULKAN
23#include <GLFW/glfw3.h>
24
25// Volk headers
26#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
27#define VOLK_IMPLEMENTATION
28#include <volk.h>
29#endif
30
31// [Win32] Our example includes a copy of glfw3.lib pre-compiled with VS2010 to maximize ease of testing and compatibility with old VS compilers.
32// To link with VS2010-era libraries, VS2015+ requires linking with legacy_stdio_definitions.lib, which we do using this pragma.
33// Your own project should not be affected, as you are likely to link with a newer binary of GLFW that is adequate for your version of Visual Studio.
34#if defined(_MSC_VER) && (_MSC_VER >= 1900) && !defined(IMGUI_DISABLE_WIN32_FUNCTIONS)
35#pragma comment(lib, "legacy_stdio_definitions")
36#endif
37
38//#define APP_USE_UNLIMITED_FRAME_RATE
39#ifdef _DEBUG
40#define APP_USE_VULKAN_DEBUG_REPORT
41static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
42#endif
43
44// Data
45static VkAllocationCallbacks* g_Allocator = nullptr;
46static VkInstance g_Instance = VK_NULL_HANDLE;
47static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
48static VkDevice g_Device = VK_NULL_HANDLE;
49static uint32_t g_QueueFamily = (uint32_t)-1;
50static VkQueue g_Queue = VK_NULL_HANDLE;
51static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
52static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
53
54static ImGui_ImplVulkanH_Window g_MainWindowData;
55static uint32_t g_MinImageCount = 2;
56static bool g_SwapChainRebuild = false;
57
58static void glfw_error_callback(int error, const char* description)
59{
60 fprintf(stderr, "GLFW Error %d: %s\n", error, description);
61}
62static void check_vk_result(VkResult err)
63{
64 if (err == VK_SUCCESS)
65 return;
66 fprintf(stderr, "[vulkan] Error: VkResult = %d\n", err);
67 if (err < 0)
68 abort();
69}
70
71#ifdef APP_USE_VULKAN_DEBUG_REPORT
72static 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)
73{
74 (void)flags; (void)object; (void)location; (void)messageCode; (void)pUserData; (void)pLayerPrefix; // Unused arguments
75 fprintf(stderr, "[vulkan] Debug report from ObjectType: %i\nMessage: %s\n\n", objectType, pMessage);
76 return VK_FALSE;
77}
78#endif // APP_USE_VULKAN_DEBUG_REPORT
79
80static bool IsExtensionAvailable(const ImVector<VkExtensionProperties>& properties, const char* extension)
81{
82 for (const VkExtensionProperties& p : properties)
83 if (strcmp(p.extensionName, extension) == 0)
84 return true;
85 return false;
86}
87
88static void SetupVulkan(ImVector<const char*> instance_extensions)
89{
90 VkResult err;
91#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
92 volkInitialize();
93#endif
94
95 // Create Vulkan Instance
96 {
97 VkInstanceCreateInfo create_info = {};
98 create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
99
100 // Enumerate available extensions
101 uint32_t properties_count;
102 ImVector<VkExtensionProperties> properties;
103 vkEnumerateInstanceExtensionProperties(nullptr, &properties_count, nullptr);
104 properties.resize(properties_count);
105 err = vkEnumerateInstanceExtensionProperties(nullptr, &properties_count, properties.Data);
106 check_vk_result(err);
107
108 // Enable required extensions
109 if (IsExtensionAvailable(properties, VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME))
110 instance_extensions.push_back(VK_KHR_GET_PHYSICAL_DEVICE_PROPERTIES_2_EXTENSION_NAME);
111#ifdef VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME
112 if (IsExtensionAvailable(properties, VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME))
113 {
114 instance_extensions.push_back(VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME);
115 create_info.flags |= VK_INSTANCE_CREATE_ENUMERATE_PORTABILITY_BIT_KHR;
116 }
117#endif
118
119 // Enabling validation layers
120#ifdef APP_USE_VULKAN_DEBUG_REPORT
121 const char* layers[] = { "VK_LAYER_KHRONOS_validation" };
122 create_info.enabledLayerCount = 1;
123 create_info.ppEnabledLayerNames = layers;
124 instance_extensions.push_back("VK_EXT_debug_report");
125#endif
126
127 // Create Vulkan Instance
128 create_info.enabledExtensionCount = (uint32_t)instance_extensions.Size;
129 create_info.ppEnabledExtensionNames = instance_extensions.Data;
130 err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
131 check_vk_result(err);
132#ifdef IMGUI_IMPL_VULKAN_USE_VOLK
133 volkLoadInstance(g_Instance);
134#endif
135
136 // Setup the debug report callback
137#ifdef APP_USE_VULKAN_DEBUG_REPORT
138 auto f_vkCreateDebugReportCallbackEXT = (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
139 IM_ASSERT(f_vkCreateDebugReportCallbackEXT != nullptr);
140 VkDebugReportCallbackCreateInfoEXT debug_report_ci = {};
141 debug_report_ci.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT;
142 debug_report_ci.flags = VK_DEBUG_REPORT_ERROR_BIT_EXT | VK_DEBUG_REPORT_WARNING_BIT_EXT | VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;
143 debug_report_ci.pfnCallback = debug_report;
144 debug_report_ci.pUserData = nullptr;
145 err = f_vkCreateDebugReportCallbackEXT(g_Instance, &debug_report_ci, g_Allocator, &g_DebugReport);
146 check_vk_result(err);
147#endif
148 }
149
150 // Select Physical Device (GPU)
151 g_PhysicalDevice = ImGui_ImplVulkanH_SelectPhysicalDevice(g_Instance);
152 IM_ASSERT(g_PhysicalDevice != VK_NULL_HANDLE);
153
154 // Select graphics queue family
155 g_QueueFamily = ImGui_ImplVulkanH_SelectQueueFamilyIndex(g_PhysicalDevice);
156 IM_ASSERT(g_QueueFamily != (uint32_t)-1);
157
158 // Create Logical Device (with 1 queue)
159 {
160 ImVector<const char*> device_extensions;
161 device_extensions.push_back("VK_KHR_swapchain");
162
163 // Enumerate physical device extension
164 uint32_t properties_count;
165 ImVector<VkExtensionProperties> properties;
166 vkEnumerateDeviceExtensionProperties(g_PhysicalDevice, nullptr, &properties_count, nullptr);
167 properties.resize(properties_count);
168 vkEnumerateDeviceExtensionProperties(g_PhysicalDevice, nullptr, &properties_count, properties.Data);
169#ifdef VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME
170 if (IsExtensionAvailable(properties, VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME))
171 device_extensions.push_back(VK_KHR_PORTABILITY_SUBSET_EXTENSION_NAME);
172#endif
173
174 const float queue_priority[] = { 1.0f };
175 VkDeviceQueueCreateInfo queue_info[1] = {};
176 queue_info[0].sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
177 queue_info[0].queueFamilyIndex = g_QueueFamily;
178 queue_info[0].queueCount = 1;
179 queue_info[0].pQueuePriorities = queue_priority;
180 VkDeviceCreateInfo create_info = {};
181 create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
182 create_info.queueCreateInfoCount = sizeof(queue_info) / sizeof(queue_info[0]);
183 create_info.pQueueCreateInfos = queue_info;
184 create_info.enabledExtensionCount = (uint32_t)device_extensions.Size;
185 create_info.ppEnabledExtensionNames = device_extensions.Data;
186 err = vkCreateDevice(g_PhysicalDevice, &create_info, g_Allocator, &g_Device);
187 check_vk_result(err);
188 vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
189 }
190
191 // Create Descriptor Pool
192 // If you wish to load e.g. additional textures you may need to alter pools sizes and maxSets.
193 {
194 VkDescriptorPoolSize pool_sizes[] =
195 {
196 { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, IMGUI_IMPL_VULKAN_MINIMUM_SAMPLED_IMAGE_POOL_SIZE },
197 { VK_DESCRIPTOR_TYPE_SAMPLER, IMGUI_IMPL_VULKAN_MINIMUM_SAMPLER_POOL_SIZE },
198 };
199 VkDescriptorPoolCreateInfo pool_info = {};
200 pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
201 pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
202 pool_info.maxSets = 0;
203 for (VkDescriptorPoolSize& pool_size : pool_sizes)
204 pool_info.maxSets += pool_size.descriptorCount;
205 pool_info.poolSizeCount = (uint32_t)IM_COUNTOF(pool_sizes);
206 pool_info.pPoolSizes = pool_sizes;
207 err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
208 check_vk_result(err);
209 }
210}
211
212// All the ImGui_ImplVulkanH_XXX structures/functions are optional helpers used by the demo.
213// Your real engine/app may not use them.
214static void SetupVulkanWindow(ImGui_ImplVulkanH_Window* wd, VkSurfaceKHR surface, int width, int height)
215{
216 // Check for WSI support
217 VkBool32 res;
218 vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, surface, &res);
219 if (res != VK_TRUE)
220 {
221 fprintf(stderr, "Error no WSI support on physical device 0\n");
222 exit(-1);
223 }
224
225 // Select Surface Format
226 const VkFormat requestSurfaceImageFormat[] = { VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM };
227 const VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
228 wd->Surface = surface;
229 wd->SurfaceFormat = ImGui_ImplVulkanH_SelectSurfaceFormat(g_PhysicalDevice, wd->Surface, requestSurfaceImageFormat, (size_t)IM_COUNTOF(requestSurfaceImageFormat), requestSurfaceColorSpace);
230
231 // Select Present Mode
232#ifdef APP_USE_UNLIMITED_FRAME_RATE
233 VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_MAILBOX_KHR, VK_PRESENT_MODE_IMMEDIATE_KHR, VK_PRESENT_MODE_FIFO_KHR };
234#else
235 VkPresentModeKHR present_modes[] = { VK_PRESENT_MODE_FIFO_KHR };
236#endif
237 wd->PresentMode = ImGui_ImplVulkanH_SelectPresentMode(g_PhysicalDevice, wd->Surface, &present_modes[0], IM_COUNTOF(present_modes));
238 //printf("[vulkan] Selected PresentMode = %d\n", wd->PresentMode);
239
240 // Create SwapChain, RenderPass, Framebuffer, etc.
241 IM_ASSERT(g_MinImageCount >= 2);
242 ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, width, height, g_MinImageCount, 0);
243}
244
245static void CleanupVulkan()
246{
247 vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);
248
249#ifdef APP_USE_VULKAN_DEBUG_REPORT
250 // Remove the debug report callback
251 auto f_vkDestroyDebugReportCallbackEXT = (PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT");
252 f_vkDestroyDebugReportCallbackEXT(g_Instance, g_DebugReport, g_Allocator);
253#endif // APP_USE_VULKAN_DEBUG_REPORT
254
255 vkDestroyDevice(g_Device, g_Allocator);
256 vkDestroyInstance(g_Instance, g_Allocator);
257}
258
259static void CleanupVulkanWindow(ImGui_ImplVulkanH_Window* wd)
260{
261 ImGui_ImplVulkanH_DestroyWindow(g_Instance, g_Device, wd, g_Allocator);
262 vkDestroySurfaceKHR(g_Instance, wd->Surface, g_Allocator);
263}
264
265static void FrameRender(ImGui_ImplVulkanH_Window* wd, ImDrawData* draw_data)
266{
267 VkSemaphore image_acquired_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].ImageAcquiredSemaphore;
268 VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
269 VkResult err = vkAcquireNextImageKHR(g_Device, wd->Swapchain, UINT64_MAX, image_acquired_semaphore, VK_NULL_HANDLE, &wd->FrameIndex);
270 if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
271 g_SwapChainRebuild = true;
272 if (err == VK_ERROR_OUT_OF_DATE_KHR)
273 return;
274 if (err != VK_SUBOPTIMAL_KHR)
275 check_vk_result(err);
276
277 ImGui_ImplVulkanH_Frame* fd = &wd->Frames[wd->FrameIndex];
278 {
279 err = vkWaitForFences(g_Device, 1, &fd->Fence, VK_TRUE, UINT64_MAX); // wait indefinitely instead of periodically checking
280 check_vk_result(err);
281
282 err = vkResetFences(g_Device, 1, &fd->Fence);
283 check_vk_result(err);
284 }
285 {
286 err = vkResetCommandPool(g_Device, fd->CommandPool, 0);
287 check_vk_result(err);
288 VkCommandBufferBeginInfo info = {};
289 info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
290 info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
291 err = vkBeginCommandBuffer(fd->CommandBuffer, &info);
292 check_vk_result(err);
293 }
294 {
295 VkRenderPassBeginInfo info = {};
296 info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
297 info.renderPass = wd->RenderPass;
298 info.framebuffer = fd->Framebuffer;
299 info.renderArea.extent.width = wd->Width;
300 info.renderArea.extent.height = wd->Height;
301 info.clearValueCount = 1;
302 info.pClearValues = &wd->ClearValue;
303 vkCmdBeginRenderPass(fd->CommandBuffer, &info, VK_SUBPASS_CONTENTS_INLINE);
304 }
305
306 // Record dear imgui primitives into command buffer
307 ImGui_ImplVulkan_RenderDrawData(draw_data, fd->CommandBuffer);
308
309 // Submit command buffer
310 vkCmdEndRenderPass(fd->CommandBuffer);
311 {
312 VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
313 VkSubmitInfo info = {};
314 info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
315 info.waitSemaphoreCount = 1;
316 info.pWaitSemaphores = &image_acquired_semaphore;
317 info.pWaitDstStageMask = &wait_stage;
318 info.commandBufferCount = 1;
319 info.pCommandBuffers = &fd->CommandBuffer;
320 info.signalSemaphoreCount = 1;
321 info.pSignalSemaphores = &render_complete_semaphore;
322
323 err = vkEndCommandBuffer(fd->CommandBuffer);
324 check_vk_result(err);
325 err = vkQueueSubmit(g_Queue, 1, &info, fd->Fence);
326 check_vk_result(err);
327 }
328}
329
330static void FramePresent(ImGui_ImplVulkanH_Window* wd)
331{
332 if (g_SwapChainRebuild)
333 return;
334 VkSemaphore render_complete_semaphore = wd->FrameSemaphores[wd->SemaphoreIndex].RenderCompleteSemaphore;
335 VkPresentInfoKHR info = {};
336 info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
337 info.waitSemaphoreCount = 1;
338 info.pWaitSemaphores = &render_complete_semaphore;
339 info.swapchainCount = 1;
340 info.pSwapchains = &wd->Swapchain;
341 info.pImageIndices = &wd->FrameIndex;
342 VkResult err = vkQueuePresentKHR(g_Queue, &info);
343 if (err == VK_ERROR_OUT_OF_DATE_KHR || err == VK_SUBOPTIMAL_KHR)
344 g_SwapChainRebuild = true;
345 if (err == VK_ERROR_OUT_OF_DATE_KHR)
346 return;
347 if (err != VK_SUBOPTIMAL_KHR)
348 check_vk_result(err);
349 wd->SemaphoreIndex = (wd->SemaphoreIndex + 1) % wd->SemaphoreCount; // Now we can use the next set of semaphores
350}
351
352// Main code
353int main(int, char**)
354{
355 glfwSetErrorCallback(glfw_error_callback);
356 if (!glfwInit())
357 return 1;
358
359 // Create window with Vulkan context
360 glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
361 float main_scale = ImGui_ImplGlfw_GetContentScaleForMonitor(glfwGetPrimaryMonitor()); // Valid on GLFW 3.3+ only
362 GLFWwindow* window = glfwCreateWindow((int)(1280 * main_scale), (int)(800 * main_scale), "Dear ImGui GLFW+Vulkan example", nullptr, nullptr);
363 if (!glfwVulkanSupported())
364 {
365 printf("GLFW: Vulkan Not Supported\n");
366 return 1;
367 }
368
369 ImVector<const char*> extensions;
370 uint32_t extensions_count = 0;
371 const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count);
372 for (uint32_t i = 0; i < extensions_count; i++)
373 extensions.push_back(glfw_extensions[i]);
374 SetupVulkan(extensions);
375
376 // Create Window Surface
377 VkSurfaceKHR surface;
378 VkResult err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &surface);
379 check_vk_result(err);
380
381 // Create Framebuffers
382 int w, h;
383 glfwGetFramebufferSize(window, &w, &h);
384 ImGui_ImplVulkanH_Window* wd = &g_MainWindowData;
385 SetupVulkanWindow(wd, surface, w, h);
386
387 // Setup Dear ImGui context
388 IMGUI_CHECKVERSION();
389 ImGui::CreateContext();
390 ImGuiIO& io = ImGui::GetIO(); (void)io;
391 io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
392 io.ConfigFlags |= ImGuiConfigFlags_NavEnableGamepad; // Enable Gamepad Controls
393 io.ConfigFlags |= ImGuiConfigFlags_DockingEnable; // Enable Docking
394 io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable; // Enable Multi-Viewport / Platform Windows
395 //io.ConfigViewportsNoAutoMerge = true;
396 //io.ConfigViewportsNoTaskBarIcon = true;
397
398 // Setup Dear ImGui style
399 ImGui::StyleColorsDark();
400 //ImGui::StyleColorsLight();
401
402 // Setup scaling
403 ImGuiStyle& style = ImGui::GetStyle();
404 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)
405 style.FontScaleDpi = main_scale; // Set initial font scale. (in docking branch: using io.ConfigDpiScaleFonts=true automatically overrides this for every window depending on the current monitor)
406 io.ConfigDpiScaleFonts = true; // [Experimental] Automatically overwrite style.FontScaleDpi in Begin() when Monitor DPI changes. This will scale fonts but _NOT_ scale sizes/padding for now.
407 io.ConfigDpiScaleViewports = true; // [Experimental] Scale Dear ImGui and Platform Windows when Monitor DPI changes.
408
409 // When viewports are enabled we tweak WindowRounding/WindowBg so platform windows can look identical to regular ones.
410 if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
411 {
412 style.WindowRounding = 0.0f;
413 style.Colors[ImGuiCol_WindowBg].w = 1.0f;
414 }
415
416 // Setup Platform/Renderer backends
417 ImGui_ImplGlfw_InitForVulkan(window, true);
418 ImGui_ImplVulkan_InitInfo init_info = {};
419 //init_info.ApiVersion = VK_API_VERSION_1_3; // Pass in your value of VkApplicationInfo::apiVersion, otherwise will default to header version.
420 init_info.Instance = g_Instance;
421 init_info.PhysicalDevice = g_PhysicalDevice;
422 init_info.Device = g_Device;
423 init_info.QueueFamily = g_QueueFamily;
424 init_info.Queue = g_Queue;
425 init_info.PipelineCache = g_PipelineCache;
426 init_info.DescriptorPool = g_DescriptorPool;
427 init_info.MinImageCount = g_MinImageCount;
428 init_info.ImageCount = wd->ImageCount;
429 init_info.Allocator = g_Allocator;
430 init_info.PipelineInfoMain.RenderPass = wd->RenderPass;
431 init_info.PipelineInfoMain.Subpass = 0;
432 init_info.PipelineInfoMain.MSAASamples = VK_SAMPLE_COUNT_1_BIT;
433 init_info.CheckVkResultFn = check_vk_result;
434 ImGui_ImplVulkan_Init(&init_info);
435
436 // Load Fonts
437 // - If fonts are not explicitly loaded, Dear ImGui will select an embedded font: either AddFontDefaultVector() or AddFontDefaultBitmap().
438 // This selection is based on (style.FontSizeBase * style.FontScaleMain * style.FontScaleDpi) reaching a small threshold.
439 // - You can load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
440 // - If a file cannot be loaded, AddFont functions will return a nullptr. Please handle those errors in your code (e.g. use an assertion, display an error and quit).
441 // - Read 'docs/FONTS.md' for more instructions and details.
442 // - Use '#define IMGUI_ENABLE_FREETYPE' in your imconfig file to use FreeType for higher quality font rendering.
443 // - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
444 //style.FontSizeBase = 20.0f;
445 //io.Fonts->AddFontDefaultVector();
446 //io.Fonts->AddFontDefaultBitmap();
447 //io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\segoeui.ttf");
448 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf");
449 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf");
450 //io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf");
451 //ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf");
452 //IM_ASSERT(font != nullptr);
453
454 // Our state
455 bool show_demo_window = true;
456 bool show_another_window = false;
457 ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
458
459 // Main loop
460 while (!glfwWindowShouldClose(window))
461 {
462 // Poll and handle events (inputs, window resize, etc.)
463 // You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
464 // - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application, or clear/overwrite your copy of the mouse data.
465 // - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application, or clear/overwrite your copy of the keyboard data.
466 // Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
467 glfwPollEvents();
468
469 // Resize swap chain?
470 int fb_width, fb_height;
471 glfwGetFramebufferSize(window, &fb_width, &fb_height);
472 if (fb_width > 0 && fb_height > 0 && (g_SwapChainRebuild || g_MainWindowData.Width != fb_width || g_MainWindowData.Height != fb_height))
473 {
474 ImGui_ImplVulkan_SetMinImageCount(g_MinImageCount);
475 ImGui_ImplVulkanH_CreateOrResizeWindow(g_Instance, g_PhysicalDevice, g_Device, wd, g_QueueFamily, g_Allocator, fb_width, fb_height, g_MinImageCount, 0);
476 g_MainWindowData.FrameIndex = 0;
477 g_SwapChainRebuild = false;
478 }
479 if (glfwGetWindowAttrib(window, GLFW_ICONIFIED) != 0)
480 {
481 ImGui_ImplGlfw_Sleep(10);
482 continue;
483 }
484
485 // Start the Dear ImGui frame
486 ImGui_ImplVulkan_NewFrame();
487 ImGui_ImplGlfw_NewFrame();
488 ImGui::NewFrame();
489
490 // 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!).
491 if (show_demo_window)
492 ImGui::ShowDemoWindow(&show_demo_window);
493
494 // 2. Show a simple window that we create ourselves. We use a Begin/End pair to create a named window.
495 {
496 static float f = 0.0f;
497 static int counter = 0;
498
499 ImGui::Begin("Hello, world!"); // Create a window called "Hello, world!" and append into it.
500
501 ImGui::Text("This is some useful text."); // Display some text (you can use a format strings too)
502 ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our window open/close state
503 ImGui::Checkbox("Another Window", &show_another_window);
504
505 ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
506 ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
507
508 if (ImGui::Button("Button")) // Buttons return true when clicked (most widgets return true when edited/activated)
509 counter++;
510 ImGui::SameLine();
511 ImGui::Text("counter = %d", counter);
512
513 ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / io.Framerate, io.Framerate);
514 ImGui::End();
515 }
516
517 // 3. Show another simple window.
518 if (show_another_window)
519 {
520 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)
521 ImGui::Text("Hello from another window!");
522 if (ImGui::Button("Close Me"))
523 show_another_window = false;
524 ImGui::End();
525 }
526
527 // Rendering
528 ImGui::Render();
529 ImDrawData* main_draw_data = ImGui::GetDrawData();
530 const bool main_is_minimized = (main_draw_data->DisplaySize.x <= 0.0f || main_draw_data->DisplaySize.y <= 0.0f);
531 wd->ClearValue.color.float32[0] = clear_color.x * clear_color.w;
532 wd->ClearValue.color.float32[1] = clear_color.y * clear_color.w;
533 wd->ClearValue.color.float32[2] = clear_color.z * clear_color.w;
534 wd->ClearValue.color.float32[3] = clear_color.w;
535 if (!main_is_minimized)
536 FrameRender(wd, main_draw_data);
537
538 // Update and Render additional Platform Windows
539 if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable)
540 {
541 ImGui::UpdatePlatformWindows();
542 ImGui::RenderPlatformWindowsDefault();
543 }
544
545 // Present Main Platform Window
546 if (!main_is_minimized)
547 FramePresent(wd);
548 }
549
550 // Cleanup
551 err = vkDeviceWaitIdle(g_Device);
552 check_vk_result(err);
553 ImGui_ImplVulkan_Shutdown();
554 ImGui_ImplGlfw_Shutdown();
555 ImGui::DestroyContext();
556
557 CleanupVulkanWindow(&g_MainWindowData);
558 CleanupVulkan();
559
560 glfwDestroyWindow(window);
561 glfwTerminate();
562
563 return 0;
564}