Examples: Added SDL+Vulkan example, the abstraction worked here :) (ref #1367)
omar
ago%!(EXTRA string=7 years)
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5 changed files with 1008 additions and 0 deletions
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// ImGui - standalone example application for SDL2 + Vulkan
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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 "../imgui_impl_sdl2.h" |
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#include "../imgui_impl_vulkan.h" |
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#include <stdio.h> |
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#include <SDL.h> |
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#include <SDL_vulkan.h> |
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#include <vulkan/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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//#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; |
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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_BackbufferIndices[IMGUI_VK_QUEUED_FRAMES]; // keep track of recently rendered swapchain frame indices
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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_PresentCompleteSemaphore[IMGUI_VK_QUEUED_FRAMES]; |
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static VkSemaphore g_RenderCompleteSemaphore[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(SDL_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, 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\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(SDL_Window* window, const char** extensions, uint32_t extensions_count) |
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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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VkInstanceCreateInfo create_info = {}; |
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create_info.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO; |
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create_info.enabledExtensionCount = extensions_count; |
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create_info.ppEnabledExtensionNames = extensions; |
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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] = 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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#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 (with SDL)
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{ |
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SDL_bool result = SDL_Vulkan_CreateSurface(window, g_Instance, &g_Surface); |
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if (result == 0)
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{ |
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printf("failed to create Vulkan surface\n"); |
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abort(); |
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} |
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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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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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// If 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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// 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 behavior is without setting this bit, there is no need for separate Spawchain image and image view format
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// 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; |
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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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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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g_SurfaceFormat = formats[0]; |
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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; // always 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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SDL_GetWindowSize(window, &w, &h); |
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resize_vulkan(window, w, h); |
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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; |
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info.queueFamilyIndex = g_QueueFamily; |
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err = vkCreateCommandPool(g_Device, &info, g_Allocator, &g_CommandPool[i]); |
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check_vk_result(err); |
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} |
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{ |
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VkCommandBufferAllocateInfo info = {}; |
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info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO; |
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info.commandPool = g_CommandPool[i]; |
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info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY; |
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info.commandBufferCount = 1; |
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err = vkAllocateCommandBuffers(g_Device, &info, &g_CommandBuffer[i]); |
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check_vk_result(err); |
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} |
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{ |
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VkFenceCreateInfo info = {}; |
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info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO; |
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info.flags = VK_FENCE_CREATE_SIGNALED_BIT; |
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err = vkCreateFence(g_Device, &info, g_Allocator, &g_Fence[i]); |
||||
check_vk_result(err); |
||||
} |
||||
{ |
||||
VkSemaphoreCreateInfo info = {}; |
||||
info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO; |
||||
err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_PresentCompleteSemaphore[i]); |
||||
check_vk_result(err); |
||||
err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_RenderCompleteSemaphore[i]); |
||||
check_vk_result(err); |
||||
} |
||||
} |
||||
|
||||
// Create Descriptor Pool
|
||||
{ |
||||
VkDescriptorPoolSize pool_size[11] = |
||||
{ |
||||
{ VK_DESCRIPTOR_TYPE_SAMPLER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 }, |
||||
{ VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 } |
||||
}; |
||||
VkDescriptorPoolCreateInfo pool_info = {}; |
||||
pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO; |
||||
pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT; |
||||
pool_info.maxSets = 1000 * 11; |
||||
pool_info.poolSizeCount = 11; |
||||
pool_info.pPoolSizes = pool_size; |
||||
err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool); |
||||
check_vk_result(err); |
||||
} |
||||
} |
||||
|
||||
static void cleanup_vulkan() |
||||
{ |
||||
vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator); |
||||
for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++) |
||||
{ |
||||
vkDestroyFence(g_Device, g_Fence[i], g_Allocator); |
||||
vkFreeCommandBuffers(g_Device, g_CommandPool[i], 1, &g_CommandBuffer[i]); |
||||
vkDestroyCommandPool(g_Device, g_CommandPool[i], g_Allocator); |
||||
vkDestroySemaphore(g_Device, g_PresentCompleteSemaphore[i], g_Allocator); |
||||
vkDestroySemaphore(g_Device, g_RenderCompleteSemaphore[i], g_Allocator); |
||||
} |
||||
for (uint32_t i = 0; i < g_BackBufferCount; i++) |
||||
{ |
||||
vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator); |
||||
vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator); |
||||
} |
||||
vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator); |
||||
vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator); |
||||
vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator); |
||||
|
||||
#ifdef IMGUI_VULKAN_DEBUG_REPORT |
||||
// 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; |
||||
for (;;) |
||||
{ |
||||
err = vkWaitForFences(g_Device, 1, &g_Fence[g_FrameIndex], VK_TRUE, 100); |
||||
if (err == VK_SUCCESS) break; |
||||
if (err == VK_TIMEOUT) continue; |
||||
check_vk_result(err); |
||||
} |
||||
{ |
||||
err = vkAcquireNextImageKHR(g_Device, g_Swapchain, UINT64_MAX, g_PresentCompleteSemaphore[g_FrameIndex], VK_NULL_HANDLE, &g_BackbufferIndices[g_FrameIndex]); |
||||
check_vk_result(err); |
||||
} |
||||
{ |
||||
err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 0); |
||||
check_vk_result(err); |
||||
VkCommandBufferBeginInfo info = {}; |
||||
info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO; |
||||
info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT; |
||||
err = vkBeginCommandBuffer(g_CommandBuffer[g_FrameIndex], &info); |
||||
check_vk_result(err); |
||||
} |
||||
{ |
||||
VkRenderPassBeginInfo info = {}; |
||||
info.sType = VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO; |
||||
info.renderPass = g_RenderPass; |
||||
info.framebuffer = g_Framebuffer[g_BackbufferIndices[g_FrameIndex]]; |
||||
info.renderArea.extent.width = fb_width; |
||||
info.renderArea.extent.height = fb_height; |
||||
info.clearValueCount = 1; |
||||
info.pClearValues = &g_ClearValue; |
||||
vkCmdBeginRenderPass(g_CommandBuffer[g_FrameIndex], &info, VK_SUBPASS_CONTENTS_INLINE); |
||||
} |
||||
} |
||||
|
||||
static void frame_end() |
||||
{ |
||||
VkResult err; |
||||
vkCmdEndRenderPass(g_CommandBuffer[g_FrameIndex]); |
||||
{ |
||||
VkPipelineStageFlags wait_stage = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT; |
||||
VkSubmitInfo info = {}; |
||||
info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO; |
||||
info.waitSemaphoreCount = 1; |
||||
info.pWaitSemaphores = &g_PresentCompleteSemaphore[g_FrameIndex]; |
||||
info.pWaitDstStageMask = &wait_stage; |
||||
info.commandBufferCount = 1; |
||||
info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex]; |
||||
info.signalSemaphoreCount = 1; |
||||
info.pSignalSemaphores = &g_RenderCompleteSemaphore[g_FrameIndex]; |
||||
|
||||
err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]); |
||||
check_vk_result(err); |
||||
err = vkResetFences(g_Device, 1, &g_Fence[g_FrameIndex]); |
||||
check_vk_result(err); |
||||
err = vkQueueSubmit(g_Queue, 1, &info, g_Fence[g_FrameIndex]); |
||||
check_vk_result(err); |
||||
} |
||||
} |
||||
|
||||
static void frame_present() |
||||
{ |
||||
VkResult err; |
||||
// If IMGUI_UNLIMITED_FRAME_RATE is defined we present the latest but one frame. Otherwise we present the latest rendered frame
|
||||
#ifdef IMGUI_UNLIMITED_FRAME_RATE |
||||
uint32_t PresentIndex = (g_FrameIndex + IMGUI_VK_QUEUED_FRAMES - 1) % IMGUI_VK_QUEUED_FRAMES; |
||||
#else |
||||
uint32_t PresentIndex = g_FrameIndex; |
||||
#endif // IMGUI_UNLIMITED_FRAME_RATE
|
||||
|
||||
VkSwapchainKHR swapchains[1] = { g_Swapchain }; |
||||
uint32_t indices[1] = { g_BackbufferIndices[PresentIndex] }; |
||||
VkPresentInfoKHR info = {}; |
||||
info.sType = VK_STRUCTURE_TYPE_PRESENT_INFO_KHR; |
||||
info.waitSemaphoreCount = 1; |
||||
info.pWaitSemaphores = &g_RenderCompleteSemaphore[PresentIndex]; |
||||
info.swapchainCount = 1; |
||||
info.pSwapchains = swapchains; |
||||
info.pImageIndices = indices; |
||||
err = vkQueuePresentKHR(g_Queue, &info); |
||||
check_vk_result(err); |
||||
|
||||
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES; |
||||
} |
||||
|
||||
int main(int, char**) |
||||
{ |
||||
// Setup SDL
|
||||
if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER) != 0) |
||||
{ |
||||
printf("Error: %s\n", SDL_GetError()); |
||||
return 1; |
||||
} |
||||
|
||||
// Setup window
|
||||
SDL_DisplayMode current; |
||||
SDL_GetCurrentDisplayMode(0, ¤t); |
||||
SDL_Window* window = SDL_CreateWindow("ImGui SDL2+Vulkan example", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 1280, 720, SDL_WINDOW_VULKAN|SDL_WINDOW_RESIZABLE); |
||||
|
||||
// Setup Vulkan
|
||||
uint32_t extensions_count; |
||||
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, nullptr); |
||||
const char** sdl_extensions = new const char*[extensions_count]; |
||||
SDL_Vulkan_GetInstanceExtensions(window, &extensions_count, sdl_extensions); |
||||
setup_vulkan(window, sdl_extensions, extensions_count); |
||||
delete[] sdl_extensions; |
||||
|
||||
// Setup ImGui binding
|
||||
ImGui::CreateContext(); |
||||
ImGuiIO& io = ImGui::GetIO(); (void)io; |
||||
//io.NavFlags |= ImGuiNavFlags_EnableKeyboard;
|
||||
|
||||
ImGui_ImplVulkan_InitData 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_ImplVulkan_Init(&init_data); |
||||
ImGui_ImplSDL2_Init(window); |
||||
|
||||
// Setup style
|
||||
ImGui::StyleColorsDark(); |
||||
//ImGui::StyleColorsClassic();
|
||||
|
||||
// Load Fonts
|
||||
// - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
|
||||
// - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.
|
||||
// - If the file cannot be loaded, the function will return NULL. Please handle those errors in your application (e.g. use an assertion, or display an error and quit).
|
||||
// - The fonts will be rasterized at a given size (w/ oversampling) and stored into a texture when calling ImFontAtlas::Build()/GetTexDataAsXXXX(), which ImGui_ImplXXXX_NewFrame below will call.
|
||||
// - Read 'misc/fonts/README.txt' for more instructions and details.
|
||||
// - Remember that in C/C++ if you want to include a backslash \ in a string literal you need to write a double backslash \\ !
|
||||
//io.Fonts->AddFontDefault();
|
||||
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Roboto-Medium.ttf", 16.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/Cousine-Regular.ttf", 15.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/DroidSans.ttf", 16.0f);
|
||||
//io.Fonts->AddFontFromFileTTF("../../misc/fonts/ProggyTiny.ttf", 10.0f);
|
||||
//ImFont* font = io.Fonts->AddFontFromFileTTF("c:\\Windows\\Fonts\\ArialUni.ttf", 18.0f, NULL, io.Fonts->GetGlyphRangesJapanese());
|
||||
//IM_ASSERT(font != NULL);
|
||||
|
||||
// Upload Fonts
|
||||
{ |
||||
VkResult err; |
||||
err = vkResetCommandPool(g_Device, g_CommandPool[g_FrameIndex], 0); |
||||
check_vk_result(err); |
||||
VkCommandBufferBeginInfo begin_info = {}; |
||||
begin_info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO; |
||||
begin_info.flags |= VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT; |
||||
err = vkBeginCommandBuffer(g_CommandBuffer[g_FrameIndex], &begin_info); |
||||
check_vk_result(err); |
||||
|
||||
ImGui_ImplVulkan_CreateFontsTexture(g_CommandBuffer[g_FrameIndex]); |
||||
|
||||
VkSubmitInfo end_info = {}; |
||||
end_info.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO; |
||||
end_info.commandBufferCount = 1; |
||||
end_info.pCommandBuffers = &g_CommandBuffer[g_FrameIndex]; |
||||
err = vkEndCommandBuffer(g_CommandBuffer[g_FrameIndex]); |
||||
check_vk_result(err); |
||||
err = vkQueueSubmit(g_Queue, 1, &end_info, VK_NULL_HANDLE); |
||||
check_vk_result(err); |
||||
|
||||
err = vkDeviceWaitIdle(g_Device); |
||||
check_vk_result(err); |
||||
ImGui_ImplVulkan_InvalidateFontUploadObjects(); |
||||
} |
||||
|
||||
bool show_demo_window = true; |
||||
bool show_another_window = false; |
||||
ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f); |
||||
|
||||
// When IMGUI_UNLIMITED_FRAME_RATE is defined we render into latest image acquired from the swapchain but we display the image which was rendered before.
|
||||
// Hence we must render once and increase the g_FrameIndex without presenting, which we do before entering the render loop.
|
||||
// This is also the reason why frame_end() is split into frame_end() and frame_present(), the later one not being called here.
|
||||
#ifdef IMGUI_UNLIMITED_FRAME_RATE |
||||
ImGui_ImplVulkan_NewFrame(); |
||||
ImGui_ImplSDL2_NewFrame(window); |
||||
frame_begin(); |
||||
ImGui_ImplVulkan_Render(g_CommandBuffer[g_FrameIndex]); |
||||
frame_end(); |
||||
g_FrameIndex = (g_FrameIndex + 1) % IMGUI_VK_QUEUED_FRAMES; |
||||
#endif // IMGUI_UNLIMITED_FRAME_RATE
|
||||
|
||||
// Main loop
|
||||
bool done = false; |
||||
while (!done) |
||||
{ |
||||
// You can read the io.WantCaptureMouse, io.WantCaptureKeyboard flags to tell if dear imgui wants to use your inputs.
|
||||
// - When io.WantCaptureMouse is true, do not dispatch mouse input data to your main application.
|
||||
// - When io.WantCaptureKeyboard is true, do not dispatch keyboard input data to your main application.
|
||||
// Generally you may always pass all inputs to dear imgui, and hide them from your application based on those two flags.
|
||||
SDL_Event event; |
||||
while (SDL_PollEvent(&event)) |
||||
{ |
||||
ImGui_ImplSDL2_ProcessEvent(&event); |
||||
if (event.type == SDL_QUIT) |
||||
done = true; |
||||
} |
||||
ImGui_ImplVulkan_NewFrame(); |
||||
ImGui_ImplSDL2_NewFrame(window); |
||||
|
||||
// 1. Show a simple window.
|
||||
// Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
|
||||
{ |
||||
static float f = 0.0f; |
||||
static int counter = 0; |
||||
ImGui::Text("Hello, world!"); // Display some text (you can use a format string too)
|
||||
ImGui::SliderFloat("float", &f, 0.0f, 1.0f); // Edit 1 float using a slider from 0.0f to 1.0f
|
||||
ImGui::ColorEdit3("clear color", (float*)&clear_color); // Edit 3 floats representing a color
|
||||
|
||||
ImGui::Checkbox("Demo Window", &show_demo_window); // Edit bools storing our windows open/close state
|
||||
ImGui::Checkbox("Another Window", &show_another_window); |
||||
|
||||
if (ImGui::Button("Button")) // Buttons return true when clicked (NB: most widgets return true when edited/activated)
|
||||
counter++; |
||||
ImGui::SameLine(); |
||||
ImGui::Text("counter = %d", counter); |
||||
|
||||
ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate); |
||||
} |
||||
|
||||
// 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
|
||||
if (show_another_window) |
||||
{ |
||||
ImGui::Begin("Another Window", &show_another_window); |
||||
ImGui::Text("Hello from another window!"); |
||||
if (ImGui::Button("Close Me")) |
||||
show_another_window = false; |
||||
ImGui::End(); |
||||
} |
||||
|
||||
// 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
|
||||
if (show_demo_window) |
||||
{ |
||||
ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
|
||||
ImGui::ShowDemoWindow(&show_demo_window); |
||||
} |
||||
|
||||
// Rendering
|
||||
memcpy(&g_ClearValue.color.float32[0], &clear_color, 4 * sizeof(float)); |
||||
frame_begin(); |
||||
ImGui_ImplVulkan_Render(g_CommandBuffer[g_FrameIndex]); |
||||
frame_end(); |
||||
frame_present(); |
||||
} |
||||
|
||||
// Cleanup
|
||||
VkResult err = vkDeviceWaitIdle(g_Device); |
||||
check_vk_result(err); |
||||
ImGui_ImplVulkan_Shutdown(); |
||||
ImGui_ImplSDL2_Shutdown(); |
||||
ImGui::DestroyContext(); |
||||
SDL_DestroyWindow(window); |
||||
cleanup_vulkan(); |
||||
SDL_Quit(); |
||||
|
||||
return 0; |
||||
} |
||||
Loading…
Reference in New Issue