1 | #include <vulkan/vulkan.h>
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2 |
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3 | #include <SDL2/SDL.h>
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4 | #include <SDL2/SDL_vulkan.h>
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5 |
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6 | //#define _USE_MATH_DEFINES // Will be needed when/if I need to # include <cmath>
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7 |
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8 | #define GLM_FORCE_RADIANS
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9 | #define GLM_FORCE_DEPTH_ZERO_TO_ONE
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10 | #include <glm/vec4.hpp>
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11 | #include <glm/mat4x4.hpp>
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12 |
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13 | #include <iostream>
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14 | #include <vector>
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15 | #include <set>
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16 | #include <stdexcept>
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17 | #include <cstdlib>
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18 | #include <optional>
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19 |
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20 | #include "game-gui-sdl.hpp"
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21 |
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22 | using namespace std;
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23 | using namespace glm;
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24 |
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25 | const int SCREEN_WIDTH = 800;
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26 | const int SCREEN_HEIGHT = 600;
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27 |
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28 | const vector<const char*> validationLayers = {
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29 | "VK_LAYER_KHRONOS_validation"
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30 | };
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31 |
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32 | #ifdef NDEBUG
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33 | const bool enableValidationLayers = false;
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34 | #else
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35 | const bool enableValidationLayers = true;
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36 | #endif
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37 |
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38 | struct QueueFamilyIndices {
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39 | optional<uint32_t> graphicsFamily;
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40 | optional<uint32_t> presentFamily;
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41 |
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42 | bool isComplete() {
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43 | return graphicsFamily.has_value() && presentFamily.has_value();
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44 | }
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45 | };
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46 |
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47 | static VKAPI_ATTR VkBool32 VKAPI_CALL debugCallback(
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48 | VkDebugUtilsMessageSeverityFlagBitsEXT messageSeverity,
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49 | VkDebugUtilsMessageTypeFlagsEXT messageType,
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50 | const VkDebugUtilsMessengerCallbackDataEXT* pCallbackData,
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51 | void* pUserData) {
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52 | cerr << "validation layer: " << pCallbackData->pMessage << endl;
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53 |
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54 | return VK_FALSE;
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55 | }
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56 |
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57 | VkResult CreateDebugUtilsMessengerEXT(VkInstance instance,
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58 | const VkDebugUtilsMessengerCreateInfoEXT* pCreateInfo,
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59 | const VkAllocationCallbacks* pAllocator,
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60 | VkDebugUtilsMessengerEXT* pDebugMessenger) {
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61 | auto func = (PFN_vkCreateDebugUtilsMessengerEXT) vkGetInstanceProcAddr(
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62 | instance, "vkCreateDebugUtilsMessengerEXT");
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63 |
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64 | if (func != nullptr) {
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65 | return func(instance, pCreateInfo, pAllocator, pDebugMessenger);
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66 | } else {
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67 | return VK_ERROR_EXTENSION_NOT_PRESENT;
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68 | }
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69 | }
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70 |
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71 | void DestroyDebugUtilsMessengerEXT(VkInstance instance,
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72 | VkDebugUtilsMessengerEXT debugMessenger,
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73 | const VkAllocationCallbacks* pAllocator) {
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74 | auto func = (PFN_vkDestroyDebugUtilsMessengerEXT) vkGetInstanceProcAddr(
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75 | instance, "vkDestroyDebugUtilsMessengerEXT");
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76 |
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77 | if (func != nullptr) {
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78 | func(instance, debugMessenger, pAllocator);
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79 | }
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80 | }
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81 |
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82 | class VulkanGame {
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83 | public:
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84 | void run() {
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85 | if (initWindow() == RTWO_ERROR) {
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86 | return;
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87 | }
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88 | initVulkan();
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89 | mainLoop();
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90 | cleanup();
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91 | }
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92 | private:
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93 | GameGui* gui = new GameGui_SDL();
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94 | SDL_Window* window = nullptr;
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95 |
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96 | VkInstance instance;
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97 | VkDebugUtilsMessengerEXT debugMessenger;
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98 | VkSurfaceKHR surface;
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99 | SDL_Surface* sdlSurface = nullptr;
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100 |
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101 | VkPhysicalDevice physicalDevice = VK_NULL_HANDLE;
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102 | VkDevice device;
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103 |
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104 | VkQueue graphicsQueue;
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105 | VkQueue presentQueue;
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106 |
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107 | // both SDL and GLFW create window functions return NULL on failure
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108 | bool initWindow() {
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109 | if (gui->Init() == RTWO_ERROR) {
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110 | cout << "UI library could not be initialized!" << endl;
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111 | return RTWO_ERROR;
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112 | } else {
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113 | // On Apple's OS X you must set the NSHighResolutionCapable Info.plist property to YES,
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114 | // otherwise you will not receive a High DPI OpenGL canvas.
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115 |
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116 | // TODO: Move this into some generic method in game-gui-sdl
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117 | window = SDL_CreateWindow("Vulkan Game",
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118 | SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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119 | SCREEN_WIDTH, SCREEN_HEIGHT,
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120 | SDL_WINDOW_VULKAN | SDL_WINDOW_SHOWN);
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121 |
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122 | if (window == nullptr) {
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123 | cout << "Window could not be created!" << endl;
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124 | return RTWO_ERROR;
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125 | } else {
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126 | return RTWO_SUCCESS;
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127 | }
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128 | }
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129 | }
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130 |
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131 | void initVulkan() {
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132 | createInstance();
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133 | setupDebugMessenger();
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134 | createSurface();
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135 | pickPhysicalDevice();
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136 | createLogicalDevice();
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137 | }
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138 |
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139 | void createInstance() {
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140 | if (enableValidationLayers && !checkValidationLayerSupport()) {
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141 | throw runtime_error("validation layers requested, but not available!");
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142 | }
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143 |
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144 | VkApplicationInfo appInfo = {};
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145 | appInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;
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146 | appInfo.pApplicationName = "Vulkan Game";
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147 | appInfo.applicationVersion = VK_MAKE_VERSION(1, 0, 0);
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148 | appInfo.pEngineName = "No Engine";
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149 | appInfo.engineVersion = VK_MAKE_VERSION(1, 0, 0);
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150 | appInfo.apiVersion = VK_API_VERSION_1_0;
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151 |
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152 | VkInstanceCreateInfo createInfo = {};
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153 | createInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;
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154 | createInfo.pApplicationInfo = &appInfo;
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155 |
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156 | vector<const char*> extensions = getRequiredExtensions();
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157 | createInfo.enabledExtensionCount = static_cast<uint32_t>(extensions.size());
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158 | createInfo.ppEnabledExtensionNames = extensions.data();
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159 |
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160 | cout << endl << "SDL extensions:" << endl;
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161 | for (const char* extensionName : extensions) {
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162 | cout << extensionName << endl;
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163 | }
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164 | cout << endl;
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165 |
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166 | VkDebugUtilsMessengerCreateInfoEXT debugCreateInfo;
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167 | if (enableValidationLayers) {
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168 | createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
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169 | createInfo.ppEnabledLayerNames = validationLayers.data();
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170 |
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171 | populateDebugMessengerCreateInfo(debugCreateInfo);
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172 | createInfo.pNext = &debugCreateInfo;
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173 | } else {
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174 | createInfo.enabledLayerCount = 0;
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175 |
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176 | createInfo.pNext = nullptr;
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177 | }
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178 |
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179 | if (vkCreateInstance(&createInfo, nullptr, &instance) != VK_SUCCESS) {
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180 | throw runtime_error("failed to create instance!");
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181 | }
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182 | }
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183 |
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184 | void setupDebugMessenger() {
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185 | if (!enableValidationLayers) return;
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186 |
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187 | VkDebugUtilsMessengerCreateInfoEXT createInfo;
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188 | populateDebugMessengerCreateInfo(createInfo);
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189 |
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190 | if (CreateDebugUtilsMessengerEXT(instance, &createInfo, nullptr, &debugMessenger) != VK_SUCCESS) {
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191 | throw runtime_error("failed to setup debug messenger!");
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192 | }
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193 | }
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194 |
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195 | void createSurface() {
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196 | sdlSurface = SDL_GetWindowSurface(window);
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197 |
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198 | if (sdlSurface == nullptr) {
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199 | cout << "Could not get SDL Surface! =(" << endl;
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200 | }
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201 |
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202 | if (!SDL_Vulkan_CreateSurface(window, instance, &surface)) {
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203 | throw runtime_error("failed to create window surface!");
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204 | }
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205 |
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206 | /*
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207 | if (glfwCreateWindowSurface(instance, window, nullptr, &surface) != VK_SUCCESS) {
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208 | throw runtime_error("failed to create window surface!");
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209 | }
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210 | */
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211 | }
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212 |
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213 | void pickPhysicalDevice() {
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214 | uint32_t deviceCount = 0;
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215 | vkEnumeratePhysicalDevices(instance, &deviceCount, nullptr);
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216 |
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217 | if (deviceCount == 0) {
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218 | throw runtime_error("failed to find GPUs with Vulkan support!");
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219 | }
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220 |
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221 | vector<VkPhysicalDevice> devices(deviceCount);
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222 | vkEnumeratePhysicalDevices(instance, &deviceCount, devices.data());
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223 |
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224 | cout << endl << "Graphics cards:" << endl;
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225 | for (const VkPhysicalDevice& device : devices) {
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226 | if (isDeviceSuitable(device)) {
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227 | physicalDevice = device;
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228 | break;
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229 | }
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230 | }
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231 | cout << endl;
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232 |
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233 | if (physicalDevice == VK_NULL_HANDLE) {
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234 | throw runtime_error("failed to find a suitable GPU!");
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235 | }
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236 | }
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237 |
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238 | bool isDeviceSuitable(VkPhysicalDevice device) {
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239 | VkPhysicalDeviceProperties deviceProperties;
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240 | VkPhysicalDeviceFeatures deviceFeatures;
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241 |
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242 | vkGetPhysicalDeviceProperties(device, &deviceProperties);
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243 | vkGetPhysicalDeviceFeatures(device, &deviceFeatures);
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244 |
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245 | cout << "Device: " << deviceProperties.deviceName << endl;
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246 |
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247 | QueueFamilyIndices indices = findQueueFamilies(device);
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248 |
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249 | return indices.isComplete();
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250 | }
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251 |
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252 | void createLogicalDevice() {
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253 | QueueFamilyIndices indices = findQueueFamilies(physicalDevice);
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254 |
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255 | vector<VkDeviceQueueCreateInfo> queueCreateInfos;
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256 | set<uint32_t> uniqueQueueFamilies = {indices.graphicsFamily.value(), indices.presentFamily.value()};
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257 |
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258 | float queuePriority = 1.0f;
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259 | for (uint32_t queueFamily : uniqueQueueFamilies) {
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260 | VkDeviceQueueCreateInfo queueCreateInfo = {};
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261 |
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262 | queueCreateInfo.sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO;
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263 | queueCreateInfo.queueFamilyIndex = queueFamily;
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264 | queueCreateInfo.queueCount = 1;
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265 | queueCreateInfo.pQueuePriorities = &queuePriority;
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266 |
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267 | queueCreateInfos.push_back(queueCreateInfo);
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268 | }
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269 |
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270 | VkPhysicalDeviceFeatures deviceFeatures = {};
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271 |
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272 | VkDeviceCreateInfo createInfo = {};
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273 | createInfo.sType = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO;
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274 |
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275 | createInfo.queueCreateInfoCount = static_cast<uint32_t>(queueCreateInfos.size());;
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276 | createInfo.pQueueCreateInfos = queueCreateInfos.data();
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277 |
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278 | createInfo.pEnabledFeatures = &deviceFeatures;
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279 |
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280 | createInfo.enabledExtensionCount = 0;
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281 |
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282 | // These fields are ignored by up-to-date Vulkan implementations,
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283 | // but it's a good idea to set them for backwards compatibility
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284 | if (enableValidationLayers) {
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285 | createInfo.enabledLayerCount = static_cast<uint32_t>(validationLayers.size());
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286 | createInfo.ppEnabledLayerNames = validationLayers.data();
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287 | } else {
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288 | createInfo.enabledLayerCount = 0;
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289 | }
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290 |
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291 | if (vkCreateDevice(physicalDevice, &createInfo, nullptr, &device) != VK_SUCCESS) {
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292 | throw runtime_error("failed to create logical device!");
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293 | }
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294 |
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295 | vkGetDeviceQueue(device, indices.graphicsFamily.value(), 0, &graphicsQueue);
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296 | vkGetDeviceQueue(device, indices.presentFamily.value(), 0, &presentQueue);
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297 | }
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298 |
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299 | bool checkValidationLayerSupport() {
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300 | uint32_t layerCount;
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301 | vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
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302 |
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303 | vector<VkLayerProperties> availableLayers(layerCount);
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304 | vkEnumerateInstanceLayerProperties(&layerCount, availableLayers.data());
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305 |
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306 | for (const char* layerName : validationLayers) {
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307 | bool layerFound = false;
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308 |
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309 | for (const auto& layerProperties : availableLayers) {
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310 | if (strcmp(layerName, layerProperties.layerName) == 0) {
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311 | layerFound = true;
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312 | break;
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313 | }
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314 | }
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315 |
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316 | if (!layerFound) {
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317 | return false;
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318 | }
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319 | }
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320 |
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321 | return true;
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322 | }
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323 |
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324 | QueueFamilyIndices findQueueFamilies(VkPhysicalDevice device) {
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325 | QueueFamilyIndices indices;
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326 |
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327 | uint32_t queueFamilyCount = 0;
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328 | vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, nullptr);
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329 |
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330 | vector<VkQueueFamilyProperties> queueFamilies(queueFamilyCount);
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331 | vkGetPhysicalDeviceQueueFamilyProperties(device, &queueFamilyCount, queueFamilies.data());
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332 |
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333 | int i = 0;
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334 | for (const auto& queueFamily : queueFamilies) {
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335 | if (queueFamily.queueCount > 0 && queueFamily.queueFlags & VK_QUEUE_GRAPHICS_BIT) {
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336 | indices.graphicsFamily = i;
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337 | }
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338 |
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339 | VkBool32 presentSupport = false;
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340 | vkGetPhysicalDeviceSurfaceSupportKHR(device, i, surface, &presentSupport);
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341 |
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342 | if (queueFamily.queueCount > 0 && presentSupport) {
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343 | indices.presentFamily = i;
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344 | }
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345 |
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346 | if (indices.isComplete()) {
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347 | break;
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348 | }
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349 |
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350 | i++;
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351 | }
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352 |
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353 | return indices;
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354 | }
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355 |
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356 | void populateDebugMessengerCreateInfo(VkDebugUtilsMessengerCreateInfoEXT& createInfo) {
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357 | createInfo = {};
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358 | createInfo.sType = VK_STRUCTURE_TYPE_DEBUG_UTILS_MESSENGER_CREATE_INFO_EXT;
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359 | createInfo.messageSeverity = VK_DEBUG_UTILS_MESSAGE_SEVERITY_VERBOSE_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_WARNING_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT;
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360 | createInfo.messageType = VK_DEBUG_UTILS_MESSAGE_TYPE_GENERAL_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_VALIDATION_BIT_EXT | VK_DEBUG_UTILS_MESSAGE_TYPE_PERFORMANCE_BIT_EXT;
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361 | createInfo.pfnUserCallback = debugCallback;
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362 | }
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363 |
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364 | vector<const char*> getRequiredExtensions() {
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365 | uint32_t extensionCount = 0;
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366 | SDL_Vulkan_GetInstanceExtensions(window, &extensionCount, nullptr);
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367 |
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368 | vector<const char*> extensions(extensionCount);
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369 | SDL_Vulkan_GetInstanceExtensions(window, &extensionCount, extensions.data());
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370 |
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371 | if (enableValidationLayers) {
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372 | extensions.push_back(VK_EXT_DEBUG_UTILS_EXTENSION_NAME);
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373 | }
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374 |
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375 | return extensions;
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376 | }
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377 |
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378 | void mainLoop() {
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379 | // TODO: Create some generic event-handling functions in game-gui-*
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380 | SDL_Event e;
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381 | bool quit = false;
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382 |
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383 | while (!quit) {
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384 | while (SDL_PollEvent(&e)) {
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385 | if (e.type == SDL_QUIT) {
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386 | quit = true;
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387 | }
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388 | if (e.type == SDL_KEYDOWN) {
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389 | quit = true;
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390 | }
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391 | if (e.type == SDL_MOUSEBUTTONDOWN) {
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392 | quit = true;
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393 | }
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394 | }
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395 | }
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396 |
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397 | SDL_FillRect(sdlSurface, nullptr, SDL_MapRGB(sdlSurface->format, 0xFF, 0xFF, 0xFF));
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398 |
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399 | SDL_UpdateWindowSurface(window);
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400 | }
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401 |
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402 | void cleanup() {
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403 | vkDestroyDevice(device, nullptr);
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404 |
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405 | if (enableValidationLayers) {
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406 | DestroyDebugUtilsMessengerEXT(instance, debugMessenger, nullptr);
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407 | }
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408 |
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409 | vkDestroySurfaceKHR(instance, surface, nullptr);
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410 | vkDestroyInstance(instance, nullptr);
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411 |
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412 | // TODO: Move this into some generic method in game-gui-sdl
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413 | SDL_DestroyWindow(window);
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414 |
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415 | gui->Shutdown();
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416 | delete gui;
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417 | }
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418 | };
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419 |
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420 | int main(int argc, char* argv[]) {
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421 |
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422 | #ifdef NDEBUG
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423 | cout << "DEBUGGING IS OFF" << endl;
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424 | #else
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425 | cout << "DEBUGGING IS ON" << endl;
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426 | #endif
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427 |
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428 | mat4 matrix;
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429 | vec4 vec;
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430 | vec4 test = matrix * vec;
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431 |
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432 | cout << "Starting Vulkan game..." << endl;
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433 |
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434 | VulkanGame game;
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435 |
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436 | try {
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437 | game.run();
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438 | } catch (const exception& e) {
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439 | cerr << e.what() << endl;
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440 | return EXIT_FAILURE;
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441 | }
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442 |
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443 | cout << "Finished running the game" << endl;
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444 |
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445 | return EXIT_SUCCESS;
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446 | }
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