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Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies
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imgui-docking/examples/vulkan_example/main.cpp

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// ImGui - standalone example application for Glfw + Vulkan, using programmable pipeline
// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
#include <imgui.h>
#include <stdio.h> // printf, fprintf
#include <stdlib.h> // abort
#define GLFW_INCLUDE_NONE
#define GLFW_INCLUDE_VULKAN
#include <GLFW/glfw3.h>
#include "imgui_impl_glfw_vulkan.h"
#define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16
#define IMGUI_UNLIMITED_FRAME_RATE
#define IMGUI_VULKAN_DEBUG_REPORT
static VkAllocationCallbacks* g_Allocator = NULL;
static VkInstance g_Instance = VK_NULL_HANDLE;
static VkSurfaceKHR g_Surface = VK_NULL_HANDLE;
static VkPhysicalDevice g_Gpu = 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 = 0;
static VkQueue g_Queue = VK_NULL_HANDLE;
static VkDebugReportCallbackEXT g_Debug_Report = VK_NULL_HANDLE;
static VkFormat g_ImageFormat = VK_FORMAT_B8G8R8A8_UNORM;
static VkFormat g_ViewFormat = VK_FORMAT_B8G8R8A8_UNORM;
static VkColorSpaceKHR g_ColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
static VkImageSubresourceRange g_ImageRange = {VK_IMAGE_ASPECT_COLOR_BIT, 0, 1, 0, 1};
static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
static int fb_width, fb_height;
static uint32_t g_BackBufferIndex = 0;
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_Semaphore[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 resize_vulkan(GLFWwindow* /*window*/, 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);
for (uint32_t i = 0; i < g_BackBufferCount; i++)
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_ImageFormat;
info.imageColorSpace = g_ColorSpace;
info.imageArrayLayers = 1;
info.imageUsage |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
#ifdef IMGUI_UNLIMITED_FRAME_RATE
info.presentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
#else
info.presentMode = VK_PRESENT_MODE_FIFO_KHR;
#endif // IMGUI_UNLIMITED_FRAME_RATE
info.clipped = VK_TRUE;
info.oldSwapchain = old_swapchain;
VkSurfaceCapabilitiesKHR cap;
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_Gpu, 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)
{
fb_width = w;
fb_height = h;
info.imageExtent.width = fb_width;
info.imageExtent.height = fb_height;
}
else
{
fb_width = cap.currentExtent.width;
fb_height = cap.currentExtent.height;
info.imageExtent.width = fb_width;
info.imageExtent.height = fb_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_ViewFormat;
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_COLOR_ATTACHMENT_OPTIMAL;
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_ViewFormat;
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;
info.subresourceRange = g_ImageRange;
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);
}
}
}
#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)
{
printf( "ObjectType : %i\nMessage : %s\n\n", objectType, pMessage );
return VK_FALSE;
}
#endif // IMGUI_VULKAN_DEBUG_REPORT
static void setup_vulkan(GLFWwindow* window)
{
VkResult err;
// Create Vulkan Instance
{
uint32_t extensions_count;
const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count);
VkInstanceCreateInfo create_info = {};
create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
#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;
// need additional storage for char pointer to debug report extension
const char** extensions = (const char**)malloc(sizeof(const char*) * (extensions_count + 1));
for(size_t i = 0; i < extensions_count; i++)
extensions[i] = glfw_extensions[i];
extensions[ extensions_count ] = "VK_EXT_debug_report";
create_info.enabledExtensionCount = extensions_count+1;
create_info.ppEnabledExtensionNames = extensions;
#elif
create_info.enabledExtensionCount = extensions_count;
create_info.ppEnabledExtensionNames = glfw_extensions;
#endif // IMGUI_VULKAN_DEBUG_REPORT
err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
check_vk_result(err);
#ifdef IMGUI_VULKAN_DEBUG_REPORT
free(extensions);
// create 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;
// get the proc address of the function pointer, required for used extensions
PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT =
(PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
err = vkCreateDebugReportCallbackEXT( g_Instance, &debug_report_ci, g_Allocator, &g_Debug_Report );
check_vk_result( err );
#endif // IMGUI_VULKAN_DEBUG_REPORT
}
// Create Window Surface
{
err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface);
check_vk_result(err);
}
// Get GPU (WARNING here we assume the first gpu is one we can use)
{
uint32_t count = 1;
err = vkEnumeratePhysicalDevices(g_Instance, &count, &g_Gpu);
check_vk_result(err);
}
// Get queue
{
uint32_t count;
vkGetPhysicalDeviceQueueFamilyProperties(g_Gpu, &count, NULL);
VkQueueFamilyProperties* queues = (VkQueueFamilyProperties*)malloc(sizeof(VkQueueFamilyProperties) * count);
vkGetPhysicalDeviceQueueFamilyProperties(g_Gpu, &count, queues);
for (uint32_t i = 0; i < count; i++)
{
if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
{
g_QueueFamily = i;
break;
}
}
free(queues);
}
// Check for WSI support
{
VkBool32 res;
vkGetPhysicalDeviceSurfaceSupportKHR(g_Gpu, 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
{
VkFormat image_view_format[][2] = {{VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_B8G8R8A8_UNORM}, {VK_FORMAT_B8G8R8A8_SRGB, VK_FORMAT_B8G8R8A8_UNORM}};
uint32_t count;
vkGetPhysicalDeviceSurfaceFormatsKHR(g_Gpu, g_Surface, &count, NULL);
VkSurfaceFormatKHR *formats = (VkSurfaceFormatKHR*)malloc(sizeof(VkSurfaceFormatKHR) * count);
vkGetPhysicalDeviceSurfaceFormatsKHR(g_Gpu, g_Surface, &count, formats);
for (size_t i = 0; i < sizeof(image_view_format) / sizeof(image_view_format[0]); i++)
{
for (uint32_t j = 0; j < count; j++)
{
if (formats[j].format == image_view_format[i][0])
{
g_ImageFormat = image_view_format[i][0];
g_ViewFormat = image_view_format[i][1];
g_ColorSpace = formats[j].colorSpace;
}
}
}
free(formats);
}
// Create Logical Device
{
int device_extension_count = 1;
const char* device_extensions[] = {"VK_KHR_swapchain"};
const uint32_t queue_index = 0;
const uint32_t queue_count = 1;
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 = queue_count;
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_Gpu, &create_info, g_Allocator, &g_Device);
check_vk_result(err);
vkGetDeviceQueue(g_Device, g_QueueFamily, queue_index, &g_Queue);
}
// Create Framebuffers
{
int w, h;
glfwGetFramebufferSize(window, &w, &h);
resize_vulkan(window, w, h);
glfwSetFramebufferSizeCallback(window, resize_vulkan);
}
// 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_Semaphore[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_Semaphore[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
// get the proc address of the function pointer, required for used extensions
auto vkDestroyDebugReportCallbackEXT =
(PFN_vkDestroyDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkDestroyDebugReportCallbackEXT");
vkDestroyDebugReportCallbackEXT(g_Instance, g_Debug_Report, g_Allocator);
#endif // IMGUI_VULKAN_DEBUG_REPORT
vkDestroyDevice(g_Device, g_Allocator);
vkDestroyInstance(g_Instance, g_Allocator);
}
static void frame_begin()
{
VkResult err;
while (true)
{
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_Semaphore[g_FrameIndex], VK_NULL_HANDLE, &g_BackBufferIndex);
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_BackBufferIndex];
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]);
{
VkImageMemoryBarrier barrier = {};
barrier.sType = VK_STRUCTURE_TYPE_IMAGE_MEMORY_BARRIER;
barrier.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
barrier.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
barrier.oldLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
barrier.newLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
barrier.srcQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
barrier.dstQueueFamilyIndex = VK_QUEUE_FAMILY_IGNORED;
barrier.image = g_BackBuffer[g_BackBufferIndex];
barrier.subresourceRange = g_ImageRange;
vkCmdPipelineBarrier(g_CommandBuffer[g_FrameIndex], VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT, VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT, 0, 0, NULL, 0, NULL, 1, &barrier);
}
{
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_Semaphore[g_FrameIndex];
info.pWaitDstStageMask = &wait_stage;
info.commandBufferCount = 1;
info.pCommandBuffers = &g_CommandBuffer[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);
}
{
VkResult res;
VkSwapchainKHR swapchains[1] = {g_Swapchain};
uint32_t indices[1] = {g_BackBufferIndex};
VkPresentInfoKHR info = {};
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
info.swapchainCount = 1;
info.pSwapchains = swapchains;
info.pImageIndices = indices;
info.pResults = &res;
err = vkQueuePresentKHR(g_Queue, &info);
check_vk_result(err);
check_vk_result(res);
}
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;
}
setup_vulkan(window);
// Setup ImGui binding
ImGui_ImplGlfwVulkan_Init_Data init_data = {};
init_data.allocator = g_Allocator;
init_data.gpu = g_Gpu;
init_data.device = g_Device;
init_data.render_pass = g_RenderPass;
init_data.pipeline_cache = g_PipelineCache;
init_data.descriptor_pool = g_DescriptorPool;
init_data.check_vk_result = check_vk_result;
ImGui_ImplGlfwVulkan_Init(window, true, &init_data);
// Load Fonts
// (there is a default font, this is only if you want to change it. see extra_fonts/README.txt for more details)
//ImGuiIO& io = ImGui::GetIO();
//io.Fonts->AddFontDefault();
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/Cousine-Regular.ttf", 15.0f);
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/DroidSans.ttf", 16.0f);
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyClean.ttf", 13.0f);
//io.Fonts->AddFontFromFileTTF("../../extra_fonts/ProggyTiny.ttf", 10.0f);
//io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
// 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_ImplGlfwVulkan_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_ImplGlfwVulkan_InvalidateFontUploadObjects();
}
bool show_test_window = true;
bool show_another_window = false;
ImVec4 clear_color = ImColor(114, 144, 154);
// Main loop
while (!glfwWindowShouldClose(window))
{
glfwPollEvents();
ImGui_ImplGlfwVulkan_NewFrame();
// 1. Show a simple window
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets appears in a window automatically called "Debug"
{
static float f = 0.0f;
ImGui::Text("Hello, world!");
ImGui::SliderFloat("float", &f, 0.0f, 1.0f);
ImGui::ColorEdit3("clear color", (float*)&clear_color);
if (ImGui::Button("Test Window")) show_test_window ^= 1;
if (ImGui::Button("Another Window")) show_another_window ^= 1;
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
}
// 2. Show another simple window, this time using an explicit Begin/End pair
if (show_another_window)
{
ImGui::SetNextWindowSize(ImVec2(200,100), ImGuiSetCond_FirstUseEver);
ImGui::Begin("Another Window", &show_another_window);
ImGui::Text("Hello");
ImGui::End();
}
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if (show_test_window)
{
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiSetCond_FirstUseEver);
ImGui::ShowTestWindow(&show_test_window);
}
g_ClearValue.color.float32[0] = clear_color.x;
g_ClearValue.color.float32[1] = clear_color.y;
g_ClearValue.color.float32[2] = clear_color.z;
g_ClearValue.color.float32[3] = clear_color.w;
frame_begin();
ImGui_ImplGlfwVulkan_Render(g_CommandBuffer[g_FrameIndex]);
frame_end();
}
// Cleanup
VkResult err = vkDeviceWaitIdle(g_Device);
check_vk_result(err);
ImGui_ImplGlfwVulkan_Shutdown();
cleanup_vulkan();
glfwTerminate();
return 0;
}