|
|
@@ -0,0 +1,587 @@
|
|
|
+// 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
|
|
|
+#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 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 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;
|
|
|
+#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 = 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 APP_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)
|
|
|
+{
|
|
|
+ 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->SemaphoreCount; // 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_GAMEPAD) != 0)
|
|
|
+ {
|
|
|
+ printf("Error: SDL_Init(): %s\n", SDL_GetError());
|
|
|
+ return -1;
|
|
|
+ }
|
|
|
+
|
|
|
+ // Create window with Vulkan graphics context
|
|
|
+ SDL_WindowFlags window_flags = (SDL_WindowFlags)(SDL_WINDOW_VULKAN | SDL_WINDOW_RESIZABLE | SDL_WINDOW_HIGH_PIXEL_DENSITY | SDL_WINDOW_HIDDEN);
|
|
|
+ SDL_Window* window = SDL_CreateWindow("Dear ImGui SDL3+Vulkan example", 1280, 720, 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 Platform/Renderer backends
|
|
|
+ ImGui_ImplSDL3_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.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).
|
|
|
+ // - 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_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 (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
|
|
|
+ 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;
|
|
|
+}
|
ocornut