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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>
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# include <stdio.h> // printf, fprintf
# include <stdlib.h> // abort
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# 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
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# define IMGUI_UNLIMITED_FRAME_RATE
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//#ifdef _DEBUG
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//#define IMGUI_VULKAN_DEBUG_REPORT
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//#endif
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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 ;
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static VkDebugReportCallbackEXT g_Debug_Report = VK_NULL_HANDLE ;
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static VkSurfaceFormatKHR g_SurfaceFormat ;
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static VkImageSubresourceRange g_ImageRange = { VK_IMAGE_ASPECT_COLOR_BIT , 0 , 1 , 0 , 1 } ;
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static VkPresentModeKHR g_PresentMode ;
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static VkPipelineCache g_PipelineCache = VK_NULL_HANDLE ;
static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE ;
static int fb_width , fb_height ;
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static uint32_t g_BackbufferIndices [ IMGUI_VK_QUEUED_FRAMES ] ; // keep track of recently rendered swapchain frame indices
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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 ] ;
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static VkSemaphore g_PresentCompleteSemaphore [ IMGUI_VK_QUEUED_FRAMES ] ;
static VkSemaphore g_RenderCompleteSemaphore [ IMGUI_VK_QUEUED_FRAMES ] ;
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static VkClearValue g_ClearValue = { } ;
static void check_vk_result ( VkResult err )
{
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if ( err = = 0 ) return ;
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printf ( " VkResult %d \n " , err ) ;
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if ( err < 0 )
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abort ( ) ;
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}
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 ) ;
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// Destroy old Framebuffer:
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for ( uint32_t i = 0 ; i < g_BackBufferCount ; i + + )
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if ( g_BackBufferView [ i ] )
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vkDestroyImageView ( g_Device , g_BackBufferView [ i ] , g_Allocator ) ;
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for ( uint32_t i = 0 ; i < g_BackBufferCount ; i + + )
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if ( g_Framebuffer [ i ] )
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vkDestroyFramebuffer ( g_Device , g_Framebuffer [ i ] , g_Allocator ) ;
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if ( g_RenderPass )
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vkDestroyRenderPass ( g_Device , g_RenderPass , g_Allocator ) ;
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// Create Swapchain:
{
VkSwapchainCreateInfoKHR info = { } ;
info . sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR ;
info . surface = g_Surface ;
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info . imageFormat = g_SurfaceFormat . format ;
info . imageColorSpace = g_SurfaceFormat . colorSpace ;
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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 ;
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info . presentMode = g_PresentMode ;
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info . clipped = VK_TRUE ;
info . oldSwapchain = old_swapchain ;
VkSurfaceCapabilitiesKHR cap ;
err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR ( g_Gpu , g_Surface , & cap ) ;
check_vk_result ( err ) ;
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if ( cap . maxImageCount > 0 )
info . minImageCount = ( cap . minImageCount + 2 < cap . maxImageCount ) ? ( cap . minImageCount + 2 ) : cap . maxImageCount ;
else
info . minImageCount = cap . minImageCount + 2 ;
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if ( cap . currentExtent . width = = 0xffffffff )
{
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fb_width = w ;
fb_height = h ;
info . imageExtent . width = fb_width ;
info . imageExtent . height = fb_height ;
}
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else
{
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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 ) ;
}
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if ( old_swapchain )
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vkDestroySwapchainKHR ( g_Device , old_swapchain , g_Allocator ) ;
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// Create the Render Pass:
{
VkAttachmentDescription attachment = { } ;
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attachment . format = g_SurfaceFormat . format ;
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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 ;
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attachment . finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR ;
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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 ) ;
}
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// Create The Image Views
{
VkImageViewCreateInfo info = { } ;
info . sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO ;
info . viewType = VK_IMAGE_VIEW_TYPE_2D ;
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info . format = g_SurfaceFormat . format ;
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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 ;
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for ( uint32_t i = 0 ; i < g_BackBufferCount ; i + + )
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{
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info . image = g_BackBuffer [ i ] ;
err = vkCreateImageView ( g_Device , & info , g_Allocator , & g_BackBufferView [ i ] ) ;
check_vk_result ( err ) ;
}
}
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// 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 ;
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for ( uint32_t i = 0 ; i < g_BackBufferCount ; i + + )
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{
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attachment [ 0 ] = g_BackBufferView [ i ] ;
err = vkCreateFramebuffer ( g_Device , & info , g_Allocator , & g_Framebuffer [ i ] ) ;
check_vk_result ( err ) ;
}
}
}
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# ifdef IMGUI_VULKAN_DEBUG_REPORT
static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report (
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VkDebugReportFlagsEXT flags , VkDebugReportObjectTypeEXT objectType , uint64_t object , size_t location , int32_t messageCode , const char * pLayerPrefix , const char * pMessage , void * pUserData )
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{
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printf ( " [vulkan] ObjectType: %i \n Message: %s \n \n " , objectType , pMessage ) ;
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return VK_FALSE ;
}
# endif // IMGUI_VULKAN_DEBUG_REPORT
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static void setup_vulkan ( GLFWwindow * window )
{
VkResult err ;
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// Create Vulkan Instance
{
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uint32_t extensions_count ;
const char * * glfw_extensions = glfwGetRequiredInstanceExtensions ( & extensions_count ) ;
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VkInstanceCreateInfo create_info = { } ;
create_info . sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO ;
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create_info . enabledExtensionCount = extensions_count ;
create_info . ppEnabledExtensionNames = glfw_extensions ;
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# 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 ) ) ;
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for ( size_t i = 0 ; i < extensions_count ; i + + )
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extensions [ i ] = glfw_extensions [ i ] ;
extensions [ extensions_count ] = " VK_EXT_debug_report " ;
create_info . enabledExtensionCount = extensions_count + 1 ;
create_info . ppEnabledExtensionNames = extensions ;
# endif // IMGUI_VULKAN_DEBUG_REPORT
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err = vkCreateInstance ( & create_info , g_Allocator , & g_Instance ) ;
check_vk_result ( err ) ;
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# 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 ) ;
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check_vk_result ( err ) ;
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# endif // IMGUI_VULKAN_DEBUG_REPORT
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}
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// Create Window Surface
{
err = glfwCreateWindowSurface ( g_Instance , window , g_Allocator , & g_Surface ) ;
check_vk_result ( err ) ;
}
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// Get GPU
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{
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uint32_t gpu_count ;
err = vkEnumeratePhysicalDevices ( g_Instance , & gpu_count , NULL ) ;
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check_vk_result ( err ) ;
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VkPhysicalDevice * gpus = ( VkPhysicalDevice * ) malloc ( sizeof ( VkPhysicalDevice ) * gpu_count ) ;
err = vkEnumeratePhysicalDevices ( g_Instance , & gpu_count , gpus ) ;
check_vk_result ( err ) ;
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// 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_Gpu = gpus [ 0 ] ;
free ( gpus ) ;
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}
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// Get queue
{
uint32_t count ;
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vkGetPhysicalDeviceQueueFamilyProperties ( g_Gpu , & count , NULL ) ;
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VkQueueFamilyProperties * queues = ( VkQueueFamilyProperties * ) malloc ( sizeof ( VkQueueFamilyProperties ) * count ) ;
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vkGetPhysicalDeviceQueueFamilyProperties ( g_Gpu , & count , queues ) ;
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for ( uint32_t i = 0 ; i < count ; i + + )
{
if ( queues [ i ] . queueFlags & VK_QUEUE_GRAPHICS_BIT )
{
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g_QueueFamily = i ;
break ;
}
}
free ( queues ) ;
}
// Check for WSI support
{
VkBool32 res ;
vkGetPhysicalDeviceSurfaceSupportKHR ( g_Gpu , g_QueueFamily , g_Surface , & res ) ;
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if ( res ! = VK_TRUE )
{
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fprintf ( stderr , " Error no WSI support on physical device 0 \n " ) ;
exit ( - 1 ) ;
}
}
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// Get Surface Format
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{
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// Per Spec Format and View Format are expected to be the same unless VK_IMAGE_CREATE_MUTABLE_BIT was set at image creation
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// Assuming that the default behavior is without setting this bit, there is no need for separate Spawchain image and image view format
// additionally several new color spaces were introduced with Vulkan Spec v1.0.40
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// hence we must make sure that a format with the mostly available color space, VK_COLOR_SPACE_SRGB_NONLINEAR_KHR, is found and used
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uint32_t count ;
vkGetPhysicalDeviceSurfaceFormatsKHR ( g_Gpu , g_Surface , & count , NULL ) ;
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VkSurfaceFormatKHR * formats = ( VkSurfaceFormatKHR * ) malloc ( sizeof ( VkSurfaceFormatKHR ) * count ) ;
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vkGetPhysicalDeviceSurfaceFormatsKHR ( g_Gpu , g_Surface , & count , formats ) ;
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// first check if only one format, VK_FORMAT_UNDEFINED, is available, which would imply that any format is available
if ( count = = 1 )
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{
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if ( formats [ 0 ] . format = = VK_FORMAT_UNDEFINED )
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{
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g_SurfaceFormat . format = VK_FORMAT_B8G8R8A8_UNORM ;
g_SurfaceFormat . colorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR ;
}
else
{ // no point in searching another format
g_SurfaceFormat = formats [ 0 ] ;
}
}
else
{
// request several formats, the first found will be used
VkFormat requestSurfaceImageFormat [ ] = { VK_FORMAT_B8G8R8A8_UNORM , VK_FORMAT_R8G8B8A8_UNORM , VK_FORMAT_B8G8R8_UNORM , VK_FORMAT_R8G8B8_UNORM } ;
VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR ;
bool requestedFound = false ;
for ( size_t i = 0 ; i < sizeof ( requestSurfaceImageFormat ) / sizeof ( requestSurfaceImageFormat [ 0 ] ) ; i + + )
{
if ( requestedFound ) {
break ;
}
for ( uint32_t j = 0 ; j < count ; j + + )
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{
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if ( formats [ j ] . format = = requestSurfaceImageFormat [ i ] & & formats [ j ] . colorSpace = = requestSurfaceColorSpace )
{
g_SurfaceFormat = formats [ j ] ;
requestedFound = true ;
}
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}
}
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// if none of the requested image formats could be found, use the first available
if ( ! requestedFound )
g_SurfaceFormat = formats [ 0 ] ;
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}
free ( formats ) ;
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}
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// Get Present Mode
{
// Requst a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
# ifdef IMGUI_UNLIMITED_FRAME_RATE
g_PresentMode = VK_PRESENT_MODE_IMMEDIATE_KHR ;
# else
g_PresentMode = VK_PRESENT_MODE_FIFO_KHR ;
# endif
uint32_t count = 0 ;
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vkGetPhysicalDeviceSurfacePresentModesKHR ( g_Gpu , g_Surface , & count , nullptr ) ;
VkPresentModeKHR * presentModes = ( VkPresentModeKHR * ) malloc ( sizeof ( VkQueueFamilyProperties ) * count ) ;
vkGetPhysicalDeviceSurfacePresentModesKHR ( g_Gpu , g_Surface , & count , presentModes ) ;
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bool presentModeAvailable = false ;
for ( size_t i = 0 ; i < count ; i + + )
{
if ( presentModes [ i ] = = g_PresentMode )
{
presentModeAvailable = true ;
break ;
}
}
if ( ! presentModeAvailable )
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g_PresentMode = VK_PRESENT_MODE_FIFO_KHR ; // always available
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}
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// 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 ) ;
}
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// Create Framebuffers
{
int w , h ;
glfwGetFramebufferSize ( window , & w , & h ) ;
resize_vulkan ( window , w , h ) ;
glfwSetFramebufferSizeCallback ( window , resize_vulkan ) ;
}
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// Create Command Buffers
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for ( int i = 0 ; i < IMGUI_VK_QUEUED_FRAMES ; i + + )
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{
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{
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 ;
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err = vkCreateSemaphore ( g_Device , & info , g_Allocator , & g_PresentCompleteSemaphore [ i ] ) ;
check_vk_result ( err ) ;
err = vkCreateSemaphore ( g_Device , & info , g_Allocator , & g_RenderCompleteSemaphore [ i ] ) ;
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check_vk_result ( err ) ;
}
}
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// Create Descriptor Pool
{
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VkDescriptorPoolSize pool_size [ 11 ] =
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{
{ 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 }
} ;
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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 ) ;
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for ( int i = 0 ; i < IMGUI_VK_QUEUED_FRAMES ; i + + )
{
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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 ) ;
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vkDestroySemaphore ( g_Device , g_PresentCompleteSemaphore [ i ] , g_Allocator ) ;
vkDestroySemaphore ( g_Device , g_RenderCompleteSemaphore [ i ] , g_Allocator ) ;
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}
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for ( uint32_t i = 0 ; i < g_BackBufferCount ; i + + )
{
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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 ) ;
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# ifdef IMGUI_VULKAN_DEBUG_REPORT
// get the proc address of the function pointer, required for used extensions
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auto vkDestroyDebugReportCallbackEXT = ( PFN_vkDestroyDebugReportCallbackEXT ) vkGetInstanceProcAddr ( g_Instance , " vkDestroyDebugReportCallbackEXT " ) ;
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vkDestroyDebugReportCallbackEXT ( g_Instance , g_Debug_Report , g_Allocator ) ;
# endif // IMGUI_VULKAN_DEBUG_REPORT
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vkDestroyDevice ( g_Device , g_Allocator ) ;
vkDestroyInstance ( g_Instance , g_Allocator ) ;
}
static void frame_begin ( )
{
VkResult err ;
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while ( true )
{
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err = vkWaitForFences ( g_Device , 1 , & g_Fence [ g_FrameIndex ] , VK_TRUE , 100 ) ;
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if ( err = = VK_SUCCESS ) break ;
if ( err = = VK_TIMEOUT ) continue ;
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check_vk_result ( err ) ;
}
{
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err = vkAcquireNextImageKHR ( g_Device , g_Swapchain , UINT64_MAX , g_PresentCompleteSemaphore [ g_FrameIndex ] , VK_NULL_HANDLE , & g_BackbufferIndices [ g_FrameIndex ] ) ;
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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 ;
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info . framebuffer = g_Framebuffer [ g_BackbufferIndices [ g_FrameIndex ] ] ;
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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 ] ) ;
{
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VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT ;
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VkSubmitInfo info = { } ;
info . sType = VK_STRUCTURE_TYPE_SUBMIT_INFO ;
info . waitSemaphoreCount = 1 ;
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info . pWaitSemaphores = & g_PresentCompleteSemaphore [ g_FrameIndex ] ;
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info . pWaitDstStageMask = & wait_stage ;
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info . commandBufferCount = 1 ;
info . pCommandBuffers = & g_CommandBuffer [ g_FrameIndex ] ;
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info . signalSemaphoreCount = 1 ;
info . pSignalSemaphores = & g_RenderCompleteSemaphore [ g_FrameIndex ] ;
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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 ) ;
}
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}
static void frame_present ( )
{
VkResult err ;
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// If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame
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# 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 ;
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}
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
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if ( ! glfwVulkanSupported ( ) )
{
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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);
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//io.Fonts->AddFontFromFileTTF("../../extra_fonts/Roboto-Medium.ttf", 16.0f);
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//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 ;
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ImVec4 clear_color = ImVec4 ( 0.45f , 0.55f , 0.60f , 1.00f ) ;
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// 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.
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# ifdef IMGUI_UNLIMITED_FRAME_RATE
ImGui_ImplGlfwVulkan_NewFrame ( ) ;
frame_begin ( ) ;
ImGui_ImplGlfwVulkan_Render ( g_CommandBuffer [ g_FrameIndex ] ) ;
frame_end ( ) ;
g_FrameIndex = ( g_FrameIndex + 1 ) % IMGUI_VK_QUEUED_FRAMES ;
# endif // IMGUI_UNLIMITED_FRAME_RATE
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// 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 : : Begin ( " Another Window " , & show_another_window ) ;
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ImGui : : Text ( " Hello from another window! " ) ;
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ImGui : : End ( ) ;
}
// 3. Show the ImGui test window. Most of the sample code is in ImGui::ShowTestWindow()
if ( show_test_window )
{
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ImGui : : SetNextWindowPos ( ImVec2 ( 650 , 20 ) , ImGuiCond_FirstUseEver ) ;
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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 ( ) ;
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frame_present ( ) ;
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}
// Cleanup
VkResult err = vkDeviceWaitIdle ( g_Device ) ;
check_vk_result ( err ) ;
ImGui_ImplGlfwVulkan_Shutdown ( ) ;
cleanup_vulkan ( ) ;
glfwTerminate ( ) ;
return 0 ;
}