mirror of
https://github.com/Drezil/imgui.git
synced 2024-11-15 09:27:00 +00:00
716 lines
28 KiB
C++
716 lines
28 KiB
C++
// ImGui - standalone example application for Glfw + Vulkan, using programmable pipeline
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// If you are new to ImGui, see examples/README.txt and documentation at the top of imgui.cpp.
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#include <imgui.h>
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#include <stdio.h> // printf, fprintf
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#include <stdlib.h> // abort
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#define GLFW_INCLUDE_NONE
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#define GLFW_INCLUDE_VULKAN
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#include <GLFW/glfw3.h>
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#include "imgui_impl_glfw_vulkan.h"
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#define IMGUI_MAX_POSSIBLE_BACK_BUFFERS 16
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#define IMGUI_UNLIMITED_FRAME_RATE
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//#define IMGUI_VULKAN_DEBUG_REPORT
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static VkAllocationCallbacks* g_Allocator = NULL;
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static VkInstance g_Instance = VK_NULL_HANDLE;
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static VkSurfaceKHR g_Surface = VK_NULL_HANDLE;
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static VkPhysicalDevice g_Gpu = VK_NULL_HANDLE;
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static VkDevice g_Device = VK_NULL_HANDLE;
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static VkSwapchainKHR g_Swapchain = VK_NULL_HANDLE;
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static VkRenderPass g_RenderPass = VK_NULL_HANDLE;
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static uint32_t g_QueueFamily = 0;
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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;
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static VkDescriptorPool g_DescriptorPool = VK_NULL_HANDLE;
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static int fb_width, fb_height;
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static uint32_t g_BackBufferIndex = 0;
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static uint32_t g_BackBufferCount = 0;
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static VkImage g_BackBuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
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static VkImageView g_BackBufferView[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
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static VkFramebuffer g_Framebuffer[IMGUI_MAX_POSSIBLE_BACK_BUFFERS] = {};
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static uint32_t g_FrameIndex = 0;
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static VkCommandPool g_CommandPool[IMGUI_VK_QUEUED_FRAMES];
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static VkCommandBuffer g_CommandBuffer[IMGUI_VK_QUEUED_FRAMES];
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static VkFence g_Fence[IMGUI_VK_QUEUED_FRAMES];
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static VkSemaphore g_Semaphore[IMGUI_VK_QUEUED_FRAMES];
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static VkClearValue g_ClearValue = {};
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static void check_vk_result(VkResult err)
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{
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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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}
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static void resize_vulkan(GLFWwindow* /*window*/, int w, int h)
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{
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VkResult err;
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VkSwapchainKHR old_swapchain = g_Swapchain;
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err = vkDeviceWaitIdle(g_Device);
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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:
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{
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VkSwapchainCreateInfoKHR info = {};
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info.sType = VK_STRUCTURE_TYPE_SWAPCHAIN_CREATE_INFO_KHR;
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info.surface = g_Surface;
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info.imageFormat = g_SurfaceFormat.format;
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info.imageColorSpace = g_SurfaceFormat.colorSpace;
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info.imageArrayLayers = 1;
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info.imageUsage |= VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
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info.imageSharingMode = VK_SHARING_MODE_EXCLUSIVE;
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info.preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR;
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info.compositeAlpha = VK_COMPOSITE_ALPHA_OPAQUE_BIT_KHR;
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info.presentMode = g_PresentMode;
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info.clipped = VK_TRUE;
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info.oldSwapchain = old_swapchain;
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VkSurfaceCapabilitiesKHR cap;
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err = vkGetPhysicalDeviceSurfaceCapabilitiesKHR(g_Gpu, g_Surface, &cap);
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check_vk_result(err);
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if (cap.maxImageCount > 0)
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info.minImageCount = (cap.minImageCount + 2 < cap.maxImageCount) ? (cap.minImageCount + 2) : cap.maxImageCount;
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else
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info.minImageCount = cap.minImageCount + 2;
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if (cap.currentExtent.width == 0xffffffff)
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{
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fb_width = w;
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fb_height = h;
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info.imageExtent.width = fb_width;
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info.imageExtent.height = fb_height;
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}
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else
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{
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fb_width = cap.currentExtent.width;
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fb_height = cap.currentExtent.height;
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info.imageExtent.width = fb_width;
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info.imageExtent.height = fb_height;
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}
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err = vkCreateSwapchainKHR(g_Device, &info, g_Allocator, &g_Swapchain);
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check_vk_result(err);
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err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, NULL);
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check_vk_result(err);
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err = vkGetSwapchainImagesKHR(g_Device, g_Swapchain, &g_BackBufferCount, g_BackBuffer);
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check_vk_result(err);
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}
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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:
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{
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VkAttachmentDescription attachment = {};
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attachment.format = g_SurfaceFormat.format;
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attachment.samples = VK_SAMPLE_COUNT_1_BIT;
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attachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
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attachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
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attachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
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attachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
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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 = {};
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color_attachment.attachment = 0;
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color_attachment.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
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VkSubpassDescription subpass = {};
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subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
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subpass.colorAttachmentCount = 1;
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subpass.pColorAttachments = &color_attachment;
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VkRenderPassCreateInfo info = {};
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info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
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info.attachmentCount = 1;
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info.pAttachments = &attachment;
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info.subpassCount = 1;
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info.pSubpasses = &subpass;
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err = vkCreateRenderPass(g_Device, &info, g_Allocator, &g_RenderPass);
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check_vk_result(err);
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}
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// Create The Image Views
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{
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VkImageViewCreateInfo info = {};
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info.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
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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;
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info.components.g = VK_COMPONENT_SWIZZLE_G;
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info.components.b = VK_COMPONENT_SWIZZLE_B;
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info.components.a = VK_COMPONENT_SWIZZLE_A;
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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];
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err = vkCreateImageView(g_Device, &info, g_Allocator, &g_BackBufferView[i]);
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check_vk_result(err);
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}
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}
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// Create Framebuffer:
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{
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VkImageView attachment[1];
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VkFramebufferCreateInfo info = {};
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info.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
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info.renderPass = g_RenderPass;
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info.attachmentCount = 1;
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info.pAttachments = attachment;
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info.width = fb_width;
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info.height = fb_height;
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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];
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err = vkCreateFramebuffer(g_Device, &info, g_Allocator, &g_Framebuffer[i]);
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check_vk_result(err);
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}
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}
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}
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#ifdef IMGUI_VULKAN_DEBUG_REPORT
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static VKAPI_ATTR VkBool32 VKAPI_CALL debug_report(
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VkDebugReportFlagsEXT, //flags,
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VkDebugReportObjectTypeEXT objectType,
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uint64_t, //object,
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size_t, //location,
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int32_t, //messageCode,
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const char*, //pLayerPrefix,
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const char* pMessage,
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void*) //pUserData)
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{
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printf( "ObjectType : %i\nMessage : %s\n\n", objectType, pMessage );
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return VK_FALSE;
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}
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#endif // IMGUI_VULKAN_DEBUG_REPORT
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static void setup_vulkan(GLFWwindow* window)
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{
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VkResult err;
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// Create Vulkan Instance
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{
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uint32_t extensions_count;
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const char** glfw_extensions = glfwGetRequiredInstanceExtensions(&extensions_count);
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VkInstanceCreateInfo create_info = {};
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create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
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#ifdef IMGUI_VULKAN_DEBUG_REPORT
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// enabling multiple validation layers grouped as lunarg standard validation
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const char* layers[] = {"VK_LAYER_LUNARG_standard_validation"};
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create_info.enabledLayerCount = 1;
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create_info.ppEnabledLayerNames = layers;
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// need additional storage for char pointer to debug report extension
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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];
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extensions[ extensions_count ] = "VK_EXT_debug_report";
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create_info.enabledExtensionCount = extensions_count+1;
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create_info.ppEnabledExtensionNames = extensions;
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#else
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create_info.enabledExtensionCount = extensions_count;
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create_info.ppEnabledExtensionNames = glfw_extensions;
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#endif // IMGUI_VULKAN_DEBUG_REPORT
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err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
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check_vk_result(err);
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#ifdef IMGUI_VULKAN_DEBUG_REPORT
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free(extensions);
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// create the debug report callback
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VkDebugReportCallbackCreateInfoEXT debug_report_ci ={};
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debug_report_ci.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CALLBACK_CREATE_INFO_EXT;
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debug_report_ci.flags = VK_DEBUG_REPORT_ERROR_BIT_EXT | VK_DEBUG_REPORT_WARNING_BIT_EXT | VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;
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debug_report_ci.pfnCallback = debug_report;
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debug_report_ci.pUserData = NULL;
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// get the proc address of the function pointer, required for used extensions
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PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT =
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(PFN_vkCreateDebugReportCallbackEXT)vkGetInstanceProcAddr(g_Instance, "vkCreateDebugReportCallbackEXT");
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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
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{
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err = glfwCreateWindowSurface(g_Instance, window, g_Allocator, &g_Surface);
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check_vk_result(err);
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}
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// Get GPU
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{
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uint32_t gpu_count;
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err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, NULL);
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check_vk_result(err);
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if( gpu_count == 1 ) { // only one gpu, assume it has a graphics queue family and use it
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err = vkEnumeratePhysicalDevices( g_Instance, &gpu_count, &g_Gpu );
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check_vk_result( err );
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} else {
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VkPhysicalDevice* gpus = (VkPhysicalDevice*)malloc(sizeof(VkPhysicalDevice) * gpu_count);
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err = vkEnumeratePhysicalDevices(g_Instance, &gpu_count, gpus);
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check_vk_result(err);
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// here a number > 1 of GPUs got reported, you should find the best fit GPU for your purpose
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// e.g. VK_PHYSICAL_DEVICE_TYPE_DISCRETE_GPU if available, or with the greatest memory available, etc.
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// for sake of simplicity we'll just take the first one, assuming it has a graphics queue family
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g_Gpu = gpus[0];
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free(gpus);
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}
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}
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// Get queue
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{
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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++)
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{
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if (queues[i].queueFlags & VK_QUEUE_GRAPHICS_BIT)
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{
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g_QueueFamily = i;
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break;
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}
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}
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free(queues);
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}
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// Check for WSI support
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{
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VkBool32 res;
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vkGetPhysicalDeviceSurfaceSupportKHR(g_Gpu, g_QueueFamily, g_Surface, &res);
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if (res != VK_TRUE)
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{
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fprintf(stderr, "Error no WSI support on physical device 0\n");
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exit(-1);
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}
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}
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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 behaviour is without setting this bit, there is no need for seperate Spapchain image and image view format
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// additionally severeal 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;
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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
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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;
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g_SurfaceFormat.colorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
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}
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else
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{ // no point in searching another format
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g_SurfaceFormat = formats[0];
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}
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}
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else
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{
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// request several formats, the first found will be used
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VkFormat requestSurfaceImageFormat[] = {VK_FORMAT_B8G8R8A8_UNORM, VK_FORMAT_R8G8B8A8_UNORM, VK_FORMAT_B8G8R8_UNORM, VK_FORMAT_R8G8B8_UNORM};
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VkColorSpaceKHR requestSurfaceColorSpace = VK_COLORSPACE_SRGB_NONLINEAR_KHR;
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bool requestedFound = false;
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for (size_t i = 0; i < sizeof(requestSurfaceImageFormat) / sizeof(requestSurfaceImageFormat[0]); i++)
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{
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if( requestedFound ) {
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break;
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}
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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)
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{
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g_SurfaceFormat = formats[j];
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requestedFound = true;
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}
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}
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}
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// if none of the requested image formats could be found, use the first available
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if (!requestedFound)
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{
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g_SurfaceFormat = formats[0];
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}
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}
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free(formats);
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}
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// Get Present Mode
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{
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// Requst a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
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#ifdef IMGUI_UNLIMITED_FRAME_RATE
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g_PresentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
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#else
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g_PresentMode = VK_PRESENT_MODE_FIFO_KHR;
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#endif
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uint32_t count = 0;
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vkGetPhysicalDeviceSurfacePresentModesKHR( g_Gpu, g_Surface, &count, nullptr );
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VkPresentModeKHR* presentModes = ( VkPresentModeKHR* )malloc( sizeof( VkQueueFamilyProperties ) * count );
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vkGetPhysicalDeviceSurfacePresentModesKHR( g_Gpu, g_Surface, &count, presentModes );
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bool presentModeAvailable = false;
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for (size_t i = 0; i < count; i++)
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{
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if (presentModes[i] == g_PresentMode)
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{
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presentModeAvailable = true;
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break;
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}
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}
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if( !presentModeAvailable )
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g_PresentMode = VK_PRESENT_MODE_FIFO_KHR; // allways available
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}
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// Create Logical Device
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{
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int device_extension_count = 1;
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const char* device_extensions[] = {"VK_KHR_swapchain"};
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const uint32_t queue_index = 0;
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const uint32_t queue_count = 1;
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const float queue_priority[] = {1.0f};
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VkDeviceQueueCreateInfo queue_info[1] = {};
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queue_info[0].sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
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queue_info[0].queueFamilyIndex = g_QueueFamily;
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queue_info[0].queueCount = queue_count;
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queue_info[0].pQueuePriorities = queue_priority;
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VkDeviceCreateInfo create_info = {};
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create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
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create_info.queueCreateInfoCount = sizeof(queue_info)/sizeof(queue_info[0]);
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create_info.pQueueCreateInfos = queue_info;
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create_info.enabledExtensionCount = device_extension_count;
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create_info.ppEnabledExtensionNames = device_extensions;
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err = vkCreateDevice(g_Gpu, &create_info, g_Allocator, &g_Device);
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check_vk_result(err);
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vkGetDeviceQueue(g_Device, g_QueueFamily, queue_index, &g_Queue);
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}
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// Create Framebuffers
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{
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int w, h;
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glfwGetFramebufferSize(window, &w, &h);
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resize_vulkan(window, w, h);
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glfwSetFramebufferSizeCallback(window, resize_vulkan);
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}
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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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{
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VkCommandPoolCreateInfo info = {};
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info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
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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]);
|
|
{
|
|
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);
|
|
}
|
|
{
|
|
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;
|
|
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;
|
|
}
|
|
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;
|
|
}
|