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@@ -0,0 +1,765 @@
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+static VkClearValue g_ClearValue = {};
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ err = vkCreateInstance(&create_info, g_Allocator, &g_Instance);
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+ check_vk_result(err);
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+
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+#ifdef IMGUI_VULKAN_DEBUG_REPORT
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+ free(extensions);
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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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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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+
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+ // if none of the requested image formats could be found, use the first available
|
|
|
+ if (!requestedFound)
|
|
|
+ g_SurfaceFormat = formats[0];
|
|
|
+ }
|
|
|
+ free(formats);
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // Get Present Mode
|
|
|
+ {
|
|
|
+ // Requst a certain mode and confirm that it is available. If not use VK_PRESENT_MODE_FIFO_KHR which is mandatory
|
|
|
+#ifdef IMGUI_UNLIMITED_FRAME_RATE
|
|
|
+ g_PresentMode = VK_PRESENT_MODE_IMMEDIATE_KHR;
|
|
|
+#else
|
|
|
+ g_PresentMode = VK_PRESENT_MODE_FIFO_KHR;
|
|
|
+#endif
|
|
|
+ uint32_t count = 0;
|
|
|
+ vkGetPhysicalDeviceSurfacePresentModesKHR(g_Gpu, g_Surface, &count, nullptr);
|
|
|
+ VkPresentModeKHR* presentModes = (VkPresentModeKHR*)malloc(sizeof(VkQueueFamilyProperties) * count);
|
|
|
+ vkGetPhysicalDeviceSurfacePresentModesKHR(g_Gpu, g_Surface, &count, presentModes);
|
|
|
+ bool presentModeAvailable = false;
|
|
|
+ for (size_t i = 0; i < count; i++)
|
|
|
+ {
|
|
|
+ if (presentModes[i] == g_PresentMode)
|
|
|
+ {
|
|
|
+ presentModeAvailable = true;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+ if (!presentModeAvailable)
|
|
|
+ g_PresentMode = VK_PRESENT_MODE_FIFO_KHR; // always available
|
|
|
+ }
|
|
|
+
|
|
|
+
|
|
|
+ // Create Logical Device
|
|
|
+ {
|
|
|
+ int device_extension_count = 1;
|
|
|
+ const char* device_extensions[] = { "VK_KHR_swapchain" };
|
|
|
+ const uint32_t queue_index = 0;
|
|
|
+ const uint32_t queue_count = 1;
|
|
|
+ const float queue_priority[] = { 1.0f };
|
|
|
+ VkDeviceQueueCreateInfo queue_info[1] = {};
|
|
|
+ queue_info[0].sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
|
|
|
+ queue_info[0].queueFamilyIndex = g_QueueFamily;
|
|
|
+ queue_info[0].queueCount = queue_count;
|
|
|
+ queue_info[0].pQueuePriorities = queue_priority;
|
|
|
+ VkDeviceCreateInfo create_info = {};
|
|
|
+ create_info.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
|
|
|
+ create_info.queueCreateInfoCount = sizeof(queue_info) / sizeof(queue_info[0]);
|
|
|
+ create_info.pQueueCreateInfos = queue_info;
|
|
|
+ create_info.enabledExtensionCount = device_extension_count;
|
|
|
+ create_info.ppEnabledExtensionNames = device_extensions;
|
|
|
+ err = vkCreateDevice(g_Gpu, &create_info, g_Allocator, &g_Device);
|
|
|
+ check_vk_result(err);
|
|
|
+ vkGetDeviceQueue(g_Device, g_QueueFamily, queue_index, &g_Queue);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Create Framebuffers
|
|
|
+ {
|
|
|
+ int w, h;
|
|
|
+ SDL_GetWindowSize(window, &w, &h);
|
|
|
+ resize_vulkan(window, w, h);
|
|
|
+ }
|
|
|
+
|
|
|
+ // Create Command Buffers
|
|
|
+ for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
|
|
|
+ {
|
|
|
+ {
|
|
|
+ VkCommandPoolCreateInfo info = {};
|
|
|
+ info.sType = VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
|
|
|
+ info.flags = VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
|
|
|
+ info.queueFamilyIndex = g_QueueFamily;
|
|
|
+ err = vkCreateCommandPool(g_Device, &info, g_Allocator, &g_CommandPool[i]);
|
|
|
+ check_vk_result(err);
|
|
|
+ }
|
|
|
+ {
|
|
|
+ VkCommandBufferAllocateInfo info = {};
|
|
|
+ info.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
|
|
|
+ info.commandPool = g_CommandPool[i];
|
|
|
+ info.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
|
|
|
+ info.commandBufferCount = 1;
|
|
|
+ err = vkAllocateCommandBuffers(g_Device, &info, &g_CommandBuffer[i]);
|
|
|
+ check_vk_result(err);
|
|
|
+ }
|
|
|
+ {
|
|
|
+ VkFenceCreateInfo info = {};
|
|
|
+ info.sType = VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
|
|
|
+ info.flags = VK_FENCE_CREATE_SIGNALED_BIT;
|
|
|
+ err = vkCreateFence(g_Device, &info, g_Allocator, &g_Fence[i]);
|
|
|
+ check_vk_result(err);
|
|
|
+ }
|
|
|
+ {
|
|
|
+ VkSemaphoreCreateInfo info = {};
|
|
|
+ info.sType = VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
|
|
|
+ err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_PresentCompleteSemaphore[i]);
|
|
|
+ check_vk_result(err);
|
|
|
+ err = vkCreateSemaphore(g_Device, &info, g_Allocator, &g_RenderCompleteSemaphore[i]);
|
|
|
+ check_vk_result(err);
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ // Create Descriptor Pool
|
|
|
+ {
|
|
|
+ VkDescriptorPoolSize pool_size[11] =
|
|
|
+ {
|
|
|
+ { VK_DESCRIPTOR_TYPE_SAMPLER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_SAMPLED_IMAGE, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_STORAGE_IMAGE, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_UNIFORM_TEXEL_BUFFER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_STORAGE_TEXEL_BUFFER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC, 1000 },
|
|
|
+ { VK_DESCRIPTOR_TYPE_INPUT_ATTACHMENT, 1000 }
|
|
|
+ };
|
|
|
+ VkDescriptorPoolCreateInfo pool_info = {};
|
|
|
+ pool_info.sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO;
|
|
|
+ pool_info.flags = VK_DESCRIPTOR_POOL_CREATE_FREE_DESCRIPTOR_SET_BIT;
|
|
|
+ pool_info.maxSets = 1000 * 11;
|
|
|
+ pool_info.poolSizeCount = 11;
|
|
|
+ pool_info.pPoolSizes = pool_size;
|
|
|
+ err = vkCreateDescriptorPool(g_Device, &pool_info, g_Allocator, &g_DescriptorPool);
|
|
|
+ check_vk_result(err);
|
|
|
+ }
|
|
|
+}
|
|
|
+
|
|
|
+static void cleanup_vulkan()
|
|
|
+{
|
|
|
+ vkDestroyDescriptorPool(g_Device, g_DescriptorPool, g_Allocator);
|
|
|
+ for (int i = 0; i < IMGUI_VK_QUEUED_FRAMES; i++)
|
|
|
+ {
|
|
|
+ vkDestroyFence(g_Device, g_Fence[i], g_Allocator);
|
|
|
+ vkFreeCommandBuffers(g_Device, g_CommandPool[i], 1, &g_CommandBuffer[i]);
|
|
|
+ vkDestroyCommandPool(g_Device, g_CommandPool[i], g_Allocator);
|
|
|
+ vkDestroySemaphore(g_Device, g_PresentCompleteSemaphore[i], g_Allocator);
|
|
|
+ vkDestroySemaphore(g_Device, g_RenderCompleteSemaphore[i], g_Allocator);
|
|
|
+ }
|
|
|
+ for (uint32_t i = 0; i < g_BackBufferCount; i++)
|
|
|
+ {
|
|
|
+ vkDestroyImageView(g_Device, g_BackBufferView[i], g_Allocator);
|
|
|
+ vkDestroyFramebuffer(g_Device, g_Framebuffer[i], g_Allocator);
|
|
|
+ }
|
|
|
+ vkDestroyRenderPass(g_Device, g_RenderPass, g_Allocator);
|
|
|
+ vkDestroySwapchainKHR(g_Device, g_Swapchain, g_Allocator);
|
|
|
+ vkDestroySurfaceKHR(g_Instance, g_Surface, g_Allocator);
|
|
|
+
|
|
|
+#ifdef IMGUI_VULKAN_DEBUG_REPORT
|
|
|
+ // 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.
|
|
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+ // 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();
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|
|
+ 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;
|
|
|
+}
|
omar