mirror of
https://github.com/Drezil/imgui.git
synced 2024-11-15 09:27:00 +00:00
704 lines
29 KiB
C++
704 lines
29 KiB
C++
// ImGui - standalone example application for Glfw + Vulkan
|
|
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
|
|
|
|
#include "imgui.h"
|
|
#include "../imgui_impl_glfw.h"
|
|
#include "../imgui_impl_vulkan.h"
|
|
|
|
#include <stdio.h> // printf, fprintf
|
|
#include <stdlib.h> // abort
|
|
#define GLFW_INCLUDE_NONE
|
|
#define GLFW_INCLUDE_VULKAN
|
|
#include <GLFW/glfw3.h>
|
|
#include <vulkan/vulkan.h>
|
|
|
|
// FIXME-VULKAN: Resizing with IMGUI_UNLIMITED_FRAME_RATE triggers errors from the validation layer.
|
|
#define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16
|
|
#define IMGUI_UNLIMITED_FRAME_RATE
|
|
#ifdef _DEBUG
|
|
#define IMGUI_VULKAN_DEBUG_REPORT
|
|
#endif
|
|
|
|
static VkAllocationCallbacks* g_Allocator = NULL;
|
|
static VkInstance g_Instance = VK_NULL_HANDLE;
|
|
static VkSurfaceKHR g_Surface = VK_NULL_HANDLE;
|
|
static VkPhysicalDevice g_PhysicalDevice = VK_NULL_HANDLE;
|
|
static VkDevice g_Device = VK_NULL_HANDLE;
|
|
static VkSwapchainKHR g_Swapchain = VK_NULL_HANDLE;
|
|
static VkRenderPass g_RenderPass = VK_NULL_HANDLE;
|
|
static uint32_t g_QueueFamily = (uint32_t)-1;
|
|
static VkQueue g_Queue = VK_NULL_HANDLE;
|
|
static VkDebugReportCallbackEXT g_DebugReport = VK_NULL_HANDLE;
|
|
|
|
static VkSurfaceFormatKHR g_SurfaceFormat;
|
|
static VkPresentModeKHR g_PresentMode;
|
|
|
|
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
|
|
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
|
|
|
|
static int fb_width, fb_height;
|
|
static uint32_t g_BackbufferIndices[IMGUI_VK_QUEUED_FRAMES]; // keep track of recently rendered swapchain frame indices
|
|
static uint32_t g_BackBufferCount = 0;
|
|
static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
|
|
static VkImageView g_BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
|
|
static VkFramebuffer g_Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
|
|
|
|
static uint32_t g_FrameIndex = 0;
|
|
static VkCommandPool g_CommandPool[IMGUI_VK_QUEUED_FRAMES];
|
|
static VkCommandBuffer g_CommandBuffer[IMGUI_VK_QUEUED_FRAMES];
|
|
static VkFence g_Fence[IMGUI_VK_QUEUED_FRAMES];
|
|
static VkSemaphore g_PresentCompleteSemaphore[IMGUI_VK_QUEUED_FRAMES];
|
|
static VkSemaphore g_RenderCompleteSemaphore[IMGUI_VK_QUEUED_FRAMES];
|
|
|
|
static VkClearValue g_ClearValue = {};
|
|
|
|
static void check_vk_result(VkResult err)
|
|
{
|
|
if (err == 0) return;
|
|
printf("VkResult %d\n", err);
|
|
if (err < 0)
|
|
abort();
|
|
}
|
|
|
|
static void CreateOrResizeSwapChainAndFrameBuffer(int w, int h)
|
|
{
|
|
VkResult err;
|
|
VkSwapchainKHR old_swapchain = g_Swapchain;
|
|
err = vkDeviceWaitIdle(g_Device);
|
|
check_vk_result(err);
|
|
|
|
// Destroy old Framebuffer
|
|
for (uint32_t i = 0; i < g_BackBufferCount; i++)
|
|
{
|
|
if (g_BackBufferView[i])
|
|
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator);
|
|
if (g_Framebuffer[i])
|
|
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator);
|
|
}
|
|
if (g_RenderPass)
|
|
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator);
|
|
|
|
// Create Swapchain
|
|
{
|
|
VkSwapchainCreateInfoKHR info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
|
|
info.surface = g_Surface;
|
|
info.imageFormat = g_SurfaceFormat.format;
|
|
info.imageColorSpace = g_SurfaceFormat.colorSpace;
|
|
info.imageArrayLayers = 1;
|
|
info.imageUsage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
|
|
info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE; // Assume that graphics family == present family
|
|
info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
|
|
info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
|
|
info.presentMode = g_PresentMode;
|
|
info.clipped = VK_TRUE;
|
|
info.oldSwapchain = old_swapchain;
|
|
VkSurfaceCapabilitiesKHR cap;
|
|
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_PhysicalDevice, g_Surface, &cap);
|
|
check_vk_result(err);
|
|
if (cap.maxImageCount > 0)
|
|
info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount;
|
|
else
|
|
info.minImageCount = cap.minImageCount + 2;
|
|
|
|
if (cap.currentExtent.width == 0xffffffff)
|
|
{
|
|
info.imageExtent.width = fb_width = w;
|
|
info.imageExtent.height = fb_height = h;
|
|
}
|
|
else
|
|
{
|
|
info.imageExtent.width = fb_width = cap.currentExtent.width;
|
|
info.imageExtent.height = fb_height = cap.currentExtent.height;
|
|
}
|
|
err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &g_Swapchain);
|
|
check_vk_result(err);
|
|
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, NULL);
|
|
check_vk_result(err);
|
|
err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, g_BackBuffer);
|
|
check_vk_result(err);
|
|
}
|
|
if (old_swapchain)
|
|
vkDestroySwapchainKHR(g_Device, old_swapchain, g_Allocator);
|
|
|
|
// Create the Render Pass
|
|
{
|
|
VkAttachmentDescription attachment = {};
|
|
attachment.format = g_SurfaceFormat.format;
|
|
attachment.samples = VK_SAMPLE_COUNT_1_BIT;
|
|
attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
|
|
attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
|
|
attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
|
|
attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
|
|
attachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
|
|
attachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
|
|
VkAttachmentReference color_attachment = {};
|
|
color_attachment.attachment = 0;
|
|
color_attachment.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
|
|
VkSubpassDescription subpass = {};
|
|
subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
|
|
subpass.colorAttachmentCount = 1;
|
|
subpass.pColorAttachments = &color_attachment;
|
|
VkRenderPassCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
|
|
info.attachmentCount = 1;
|
|
info.pAttachments = &attachment;
|
|
info.subpassCount = 1;
|
|
info.pSubpasses = &subpass;
|
|
err = vkCreateRenderPass(g_Device, &info, g_Allocator, &g_RenderPass);
|
|
check_vk_result(err);
|
|
}
|
|
|
|
// Create The Image Views
|
|
{
|
|
VkImageViewCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
|
|
info.viewType = VK_IMAGE_VIEW_TYPE_2D;
|
|
info.format = g_SurfaceFormat.format;
|
|
info.components.r = VK_COMPONENT_SWIZZLE_R;
|
|
info.components.g = VK_COMPONENT_SWIZZLE_G;
|
|
info.components.b = VK_COMPONENT_SWIZZLE_B;
|
|
info.components.a = VK_COMPONENT_SWIZZLE_A;
|
|
VkImageSubresourceRange image_range = { VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1 };
|
|
info.subresourceRange = image_range;
|
|
for (uint32_t i = 0; i < g_BackBufferCount; i++)
|
|
{
|
|
info.image = g_BackBuffer[i];
|
|
err = vkCreateImageView(g_Device, &info, g_Allocator, &g_BackBufferView[i]);
|
|
check_vk_result(err);
|
|
}
|
|
}
|
|
|
|
// Create Framebuffer
|
|
{
|
|
VkImageView attachment[1];
|
|
VkFramebufferCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
|
|
info.renderPass = g_RenderPass;
|
|
info.attachmentCount = 1;
|
|
info.pAttachments = attachment;
|
|
info.width = fb_width;
|
|
info.height = fb_height;
|
|
info.layers = 1;
|
|
for (uint32_t i = 0; i < g_BackBufferCount; i++)
|
|
{
|
|
attachment[0] = g_BackBufferView[i];
|
|
err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &g_Framebuffer[i]);
|
|
check_vk_result(err);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void GlfwResizeCallback(GLFWwindow*, int w, int h)
|
|
{
|
|
CreateOrResizeSwapChainAndFrameBuffer(w, h);
|
|
}
|
|
|
|
#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 arguemnts
|
|
printf("[vulkan] ObjectType: %i\nMessage: %s\n\n", objectType, pMessage);
|
|
return VK_FALSE;
|
|
}
|
|
#endif // IMGUI_VULKAN_DEBUG_REPORT
|
|
|
|
static void setup_vulkan(GLFWwindow* window, const char** extensions, uint32_t extensions_count)
|
|
{
|
|
VkResult err;
|
|
|
|
// Create Vulkan Instance
|
|
{
|
|
VkInstanceCreateInfo create_info = {};
|
|
create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
|
|
create_info.enabledExtensionCount = extensions_count;
|
|
create_info.ppEnabledExtensionNames = extensions;
|
|
|
|
#ifdef IMGUI_VULKAN_DEBUG_REPORT
|
|
// Enabling multiple validation layers grouped as LunarG standard validation
|
|
const char* layers[] = { "VK_LAYER_LUNARG_standard_validation" };
|
|
create_info.enabledLayerCount = 1;
|
|
create_info.ppEnabledLayerNames = layers;
|
|
|
|
// Enable debug report extension (we need additional storage, so we duplicate the user array to add our new extension to it)
|
|
const char** extensions_ext = (const char**)malloc(sizeof(const char*) * (extensions_count + 1));
|
|
memcpy(extensions_ext, extensions, extensions_count * sizeof(const char*));
|
|
extensions_ext[extensions_count] = "VK_EXT_debug_report";
|
|
create_info.enabledExtensionCount = extensions_count + 1;
|
|
create_info.ppEnabledExtensionNames = extensions_ext;
|
|
#endif // IMGUI_VULKAN_DEBUG_REPORT
|
|
|
|
err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
|
|
check_vk_result(err);
|
|
|
|
#ifdef IMGUI_VULKAN_DEBUG_REPORT
|
|
free(extensions_ext);
|
|
|
|
// Get the function pointer (required for any extensions)
|
|
auto vkCreateDebugReportCallbackEXT = (PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
|
|
IM_ASSERT(vkCreateDebugReportCallbackEXT != NULL);
|
|
|
|
// Setup the debug report callback
|
|
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 = NULL;
|
|
err = vkCreateDebugReportCallbackEXT(g_Instance, &debug_report_ci, g_Allocator, &g_DebugReport);
|
|
check_vk_result(err);
|
|
#endif // IMGUI_VULKAN_DEBUG_REPORT
|
|
}
|
|
|
|
// Create Window Surface (with GLFW)
|
|
{
|
|
err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface);
|
|
check_vk_result(err);
|
|
}
|
|
|
|
// Select GPU
|
|
{
|
|
uint32_t gpu_count;
|
|
err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, NULL);
|
|
check_vk_result(err);
|
|
|
|
VkPhysicalDevice* gpus = (VkPhysicalDevice*)malloc(sizeof(VkPhysicalDevice) * gpu_count);
|
|
err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
|
|
check_vk_result(err);
|
|
|
|
// If a number >1 of GPUs got reported, you should find the best fit GPU for your purpose
|
|
// e.g. VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU if available, or with the greatest memory available, etc.
|
|
// for sake of simplicity we'll just take the first one, assuming it has a graphics queue family.
|
|
g_PhysicalDevice = gpus[0];
|
|
free(gpus);
|
|
}
|
|
|
|
// Select graphics queue family
|
|
{
|
|
uint32_t count;
|
|
vkGetPhysicalDeviceQueueFamilyProperties(g_PhysicalDevice, &count, NULL);
|
|
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 != -1);
|
|
}
|
|
|
|
// Check for WSI support
|
|
{
|
|
VkBool32 res;
|
|
vkGetPhysicalDeviceSurfaceSupportKHR(g_PhysicalDevice, g_QueueFamily, g_Surface, &res);
|
|
if (res != VK_TRUE)
|
|
{
|
|
fprintf(stderr, "Error no WSI support on physical device 0\n");
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
|
|
// Get 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;
|
|
g_SurfaceFormat = ImGui_ImplVulkan_SelectSurfaceFormat(g_PhysicalDevice, g_Surface, requestSurfaceImageFormat, (size_t)IM_ARRAYSIZE(requestSurfaceImageFormat), requestSurfaceColorSpace);
|
|
}
|
|
|
|
|
|
// Get Present Mode
|
|
{
|
|
#ifdef IMGUI_UNLIMITED_FRAME_RATE
|
|
VkPresentModeKHR present_mode = VK_PRESENT_MODE_IMMEDIATE_KHR;
|
|
#else
|
|
VkPresentModeKHR present_mode = VK_PRESENT_MODE_FIFO_KHR;
|
|
#endif
|
|
g_PresentMode = ImGui_ImplVulkan_SelectPresentMode(g_PhysicalDevice, g_Surface, &present_mode, 1);
|
|
}
|
|
|
|
|
|
// Create Logical Device (with 1 queue)
|
|
{
|
|
int device_extension_count = 1;
|
|
const char* device_extensions[] = { "VK_KHR_swapchain" };
|
|
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 = device_extension_count;
|
|
create_info.ppEnabledExtensionNames = device_extensions;
|
|
err = vkCreateDevice(g_PhysicalDevice, &create_info, g_Allocator, &g_Device);
|
|
check_vk_result(err);
|
|
vkGetDeviceQueue(g_Device, g_QueueFamily, 0, &g_Queue);
|
|
}
|
|
|
|
|
|
// Create Framebuffers
|
|
{
|
|
int w, h;
|
|
glfwGetFramebufferSize(window, &w, &h);
|
|
CreateOrResizeSwapChainAndFrameBuffer(w, h);
|
|
glfwSetFramebufferSizeCallback(window, GlfwResizeCallback);
|
|
}
|
|
|
|
|
|
// Create Command Buffers
|
|
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
|
|
{
|
|
{
|
|
VkCommandPoolCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
|
|
info.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
|
|
info.queueFamilyIndex = g_QueueFamily;
|
|
err = vkCreateCommandPool(g_Device, &info, g_Allocator, &g_CommandPool[i]);
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
VkCommandBufferAllocateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
|
|
info.commandPool = g_CommandPool[i];
|
|
info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
|
|
info.commandBufferCount = 1;
|
|
err = vkAllocateCommandBuffers(g_Device, &info, &g_CommandBuffer[i]);
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
VkFenceCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
|
|
info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
|
|
err = vkCreateFence(g_Device, &info, g_Allocator, &g_Fence[i]);
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
VkSemaphoreCreateInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
|
|
err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_PresentCompleteSemaphore[i]);
|
|
check_vk_result(err);
|
|
err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_RenderCompleteSemaphore[i]);
|
|
check_vk_result(err);
|
|
}
|
|
}
|
|
|
|
// Create Descriptor Pool
|
|
{
|
|
VkDescriptorPoolSize pool_size[11] =
|
|
{
|
|
{ VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
|
|
{ VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
|
|
};
|
|
VkDescriptorPoolCreateInfo pool_info = {};
|
|
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
|
|
pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
|
|
pool_info.maxSets = 1000 * 11;
|
|
pool_info.poolSizeCount = 11;
|
|
pool_info.pPoolSizes = pool_size;
|
|
err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
|
|
check_vk_result(err);
|
|
}
|
|
}
|
|
|
|
static void cleanup_vulkan()
|
|
{
|
|
vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);
|
|
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
|
|
{
|
|
vkDestroyFence(g_Device, g_Fence[i], g_Allocator);
|
|
vkFreeCommandBuffers(g_Device, g_CommandPool[i], 1, &g_CommandBuffer[i]);
|
|
vkDestroyCommandPool(g_Device, g_CommandPool[i], g_Allocator);
|
|
vkDestroySemaphore(g_Device, g_PresentCompleteSemaphore[i], g_Allocator);
|
|
vkDestroySemaphore(g_Device, g_RenderCompleteSemaphore[i], g_Allocator);
|
|
}
|
|
for (uint32_t i = 0; i < g_BackBufferCount; i++)
|
|
{
|
|
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator);
|
|
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator);
|
|
}
|
|
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator);
|
|
vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator);
|
|
vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator);
|
|
|
|
#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 frame_begin()
|
|
{
|
|
VkResult err;
|
|
for (;;)
|
|
{
|
|
err = vkWaitForFences(g_Device, 1, &g_Fence[g_FrameIndex], VK_TRUE, 100);
|
|
if (err == VK_SUCCESS) break;
|
|
if (err == VK_TIMEOUT) continue;
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
err = vkAcquireNextImageKHR(g_Device, g_Swapchain, UINT64_MAX, g_PresentCompleteSemaphore[g_FrameIndex], VK_NULL_HANDLE, &g_BackbufferIndices[g_FrameIndex]);
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 0);
|
|
check_vk_result(err);
|
|
VkCommandBufferBeginInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
|
|
info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
|
|
err = vkBeginCommandBuffer(g_CommandBuffer[g_FrameIndex], &info);
|
|
check_vk_result(err);
|
|
}
|
|
{
|
|
VkRenderPassBeginInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
|
|
info.renderPass = g_RenderPass;
|
|
info.framebuffer = g_Framebuffer[g_BackbufferIndices[g_FrameIndex]];
|
|
info.renderArea.extent.width = fb_width;
|
|
info.renderArea.extent.height = fb_height;
|
|
info.clearValueCount = 1;
|
|
info.pClearValues = &g_ClearValue;
|
|
vkCmdBeginRenderPass(g_CommandBuffer[g_FrameIndex], &info, VK_SUBPASS_CONTENTS_INLINE);
|
|
}
|
|
}
|
|
|
|
static void frame_end()
|
|
{
|
|
VkResult err;
|
|
vkCmdEndRenderPass(g_CommandBuffer[g_FrameIndex]);
|
|
{
|
|
VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
|
|
VkSubmitInfo info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
|
|
info.waitSemaphoreCount = 1;
|
|
info.pWaitSemaphores = &g_PresentCompleteSemaphore[g_FrameIndex];
|
|
info.pWaitDstStageMask = &wait_stage;
|
|
info.commandBufferCount = 1;
|
|
info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex];
|
|
info.signalSemaphoreCount = 1;
|
|
info.pSignalSemaphores = &g_RenderCompleteSemaphore[g_FrameIndex];
|
|
|
|
err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]);
|
|
check_vk_result(err);
|
|
err = vkResetFences(g_Device, 1, &g_Fence[g_FrameIndex]);
|
|
check_vk_result(err);
|
|
err = vkQueueSubmit(g_Queue, 1, &info, g_Fence[g_FrameIndex]);
|
|
check_vk_result(err);
|
|
}
|
|
}
|
|
|
|
static void frame_present()
|
|
{
|
|
VkResult err;
|
|
// If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame
|
|
#ifdef IMGUI_UNLIMITED_FRAME_RATE
|
|
uint32_t PresentIndex = (g_FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES;
|
|
#else
|
|
uint32_t PresentIndex = g_FrameIndex;
|
|
#endif // IMGUI_UNLIMITED_FRAME_RATE
|
|
|
|
VkSwapchainKHR swapchains[1] = { g_Swapchain };
|
|
uint32_t indices[1] = { g_BackbufferIndices[PresentIndex] };
|
|
VkPresentInfoKHR info = {};
|
|
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
|
|
info.waitSemaphoreCount = 1;
|
|
info.pWaitSemaphores = &g_RenderCompleteSemaphore[PresentIndex];
|
|
info.swapchainCount = 1;
|
|
info.pSwapchains = swapchains;
|
|
info.pImageIndices = indices;
|
|
err = vkQueuePresentKHR(g_Queue, &info);
|
|
check_vk_result(err);
|
|
|
|
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
|
|
}
|
|
|
|
static void error_callback(int error, const char* description)
|
|
{
|
|
fprintf(stderr, "Error %d: %s\n", error, description);
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
// Setup window
|
|
glfwSetErrorCallback(error_callback);
|
|
if (!glfwInit())
|
|
return 1;
|
|
|
|
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
|
|
GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui Vulkan example", NULL, NULL);
|
|
|
|
// Setup Vulkan
|
|
if (!glfwVulkanSupported())
|
|
{
|
|
printf("GLFW: Vulkan Not Supported\n");
|
|
return 1;
|
|
}
|
|
uint32_t extensions_count = 0;
|
|
const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count);
|
|
setup_vulkan(window, glfw_extensions, extensions_count);
|
|
|
|
// Setup ImGui binding
|
|
ImGui::CreateContext();
|
|
|
|
ImGui_ImplVulkan_InitInfo init_info = {};
|
|
init_info.Allocator = g_Allocator;
|
|
init_info.PhysicalDevice = g_PhysicalDevice;
|
|
init_info.Device = g_Device;
|
|
init_info.RenderPass = g_RenderPass;
|
|
init_info.PipelineCache = g_PipelineCache;
|
|
init_info.DescriptorPool = g_DescriptorPool;
|
|
init_info.CheckVkResultFn = check_vk_result;
|
|
|
|
ImGuiIO& io = ImGui::GetIO(); (void)io;
|
|
//io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard; // Enable Keyboard Controls
|
|
ImGui_ImplVulkan_Init(&init_info);
|
|
ImGui_ImplGlfw_Init(window, true);
|
|
|
|
// Setup style
|
|
ImGui::StyleColorsDark();
|
|
//ImGui::StyleColorsClassic();
|
|
|
|
// 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 NULL. 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.
|
|
// - Read 'misc/fonts/README.txt' 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("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
|
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
|
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
|
|
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
|
|
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
|
|
//IM_ASSERT(font != NULL);
|
|
|
|
// Upload Fonts
|
|
{
|
|
VkResult err;
|
|
err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 0);
|
|
check_vk_result(err);
|
|
VkCommandBufferBeginInfo begin_info = {};
|
|
begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
|
|
begin_info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
|
|
err = vkBeginCommandBuffer(g_CommandBuffer[g_FrameIndex], &begin_info);
|
|
check_vk_result(err);
|
|
|
|
ImGui_ImplVulkan_CreateFontsTexture(g_CommandBuffer[g_FrameIndex]);
|
|
|
|
VkSubmitInfo end_info = {};
|
|
end_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
|
|
end_info.commandBufferCount = 1;
|
|
end_info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex];
|
|
err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]);
|
|
check_vk_result(err);
|
|
err = vkQueueSubmit(g_Queue, 1, &end_info, VK_NULL_HANDLE);
|
|
check_vk_result(err);
|
|
|
|
err = vkDeviceWaitIdle(g_Device);
|
|
check_vk_result(err);
|
|
ImGui_ImplVulkan_InvalidateFontUploadObjects();
|
|
}
|
|
|
|
bool show_demo_window = true;
|
|
bool show_another_window = false;
|
|
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
|
|
|
|
// When IMGUI_UNLIMITED_FRAME_RATE is defined we render into latest image acquired from the swapchain but we display the image which was rendered before.
|
|
// Hence we must render once and increase the g_FrameIndex without presenting, which we do before entering the render loop.
|
|
// This is also the reason why frame_end() is split into frame_end() and frame_present(), the later one not being called here.
|
|
#ifdef IMGUI_UNLIMITED_FRAME_RATE
|
|
ImGui_ImplVulkan_NewFrame();
|
|
ImGui_ImplGlfw_NewFrame();
|
|
frame_begin();
|
|
ImGui_ImplVulkan_Render(g_CommandBuffer[g_FrameIndex]);
|
|
frame_end();
|
|
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES;
|
|
#endif // IMGUI_UNLIMITED_FRAME_RATE
|
|
|
|
// Main loop
|
|
while (!glfwWindowShouldClose(window))
|
|
{
|
|
// 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.
|
|
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
|
|
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
|
|
glfwPollEvents();
|
|
ImGui_ImplVulkan_NewFrame();
|
|
ImGui_ImplGlfw_NewFrame();
|
|
|
|
// 1. Show a simple window.
|
|
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
|
|
{
|
|
static float f = 0.0f;
|
|
static int counter = 0;
|
|
ImGui::Text("Hello, world!"); // Display some text (you can use a format string too)
|
|
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
|
|
|
|
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our windows open/close state
|
|
ImGui::Checkbox("Another Window", &show_another_window);
|
|
|
|
if (ImGui::Button("Button")) // Buttons return true when clicked (NB: 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 / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
|
|
}
|
|
|
|
// 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
|
|
if (show_another_window)
|
|
{
|
|
ImGui::Begin("Another Window", &show_another_window);
|
|
ImGui::Text("Hello from another window!");
|
|
if (ImGui::Button("Close Me"))
|
|
show_another_window = false;
|
|
ImGui::End();
|
|
}
|
|
|
|
// 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
|
|
if (show_demo_window)
|
|
{
|
|
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
|
|
ImGui::ShowDemoWindow(&show_demo_window);
|
|
}
|
|
|
|
// Rendering
|
|
memcpy(&g_ClearValue.color.float32[0], &clear_color, 4 * sizeof(float));
|
|
frame_begin();
|
|
ImGui_ImplVulkan_Render(g_CommandBuffer[g_FrameIndex]);
|
|
frame_end();
|
|
frame_present();
|
|
}
|
|
|
|
// Cleanup
|
|
VkResult err = vkDeviceWaitIdle(g_Device);
|
|
check_vk_result(err);
|
|
ImGui_ImplVulkan_Shutdown();
|
|
ImGui_ImplGlfw_Shutdown();
|
|
ImGui::DestroyContext();
|
|
cleanup_vulkan();
|
|
glfwTerminate();
|
|
|
|
return 0;
|
|
}
|