#define GLFW_INCLUDE_VULKAN

#include <GLFW/glfw3.h>

#include <iostream>

#include <stdexcept>

#include <functional>

const int WIDTH = 800;

const int HEIGHT = 600;

template <typename T>

class VDeleter {

public:

VDeleter() : VDeleter([](T, VkAllocationCallbacks*) {}) {}

VDeleter(std::function<void(T, VkAllocationCallbacks*)> deletef) {

this->deleter = [=](T obj) { deletef(obj, nullptr); };

}

VDeleter(const VDeleter<VkInstance>& instance, std::function<void(VkInstance, T, VkAllocationCallbacks*)> deletef) {

this->deleter = [&instance, deletef](T obj) { deletef(instance, obj, nullptr); };

}

VDeleter(const VDeleter<VkDevice>& device, std::function<void(VkDevice, T, VkAllocationCallbacks*)> deletef) {

this->deleter = [&device, deletef](T obj) { deletef(device, obj, nullptr); };

}

~VDeleter() {

cleanup();

}

T* operator &() {

cleanup();

return &object;

}

operator T() const {

return object;

}

private:

T object{VK_NULL_HANDLE};

std::function<void(T)> deleter;

void cleanup() {

if (object != VK_NULL_HANDLE) {

deleter(object);

}

object = VK_NULL_HANDLE;

}

};

class HelloTriangleApplication {

public:

void run() {

initWindow();

initVulkan();

mainLoop();

}

private:

GLFWwindow* window;

VDeleter<VkInstance> instance{vkDestroyInstance};

void initWindow() {

glfwInit();

glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);

glfwWindowHint(GLFW_RESIZABLE, GLFW_FALSE);

window = glfwCreateWindow(WIDTH, HEIGHT, "Vulkan", nullptr, nullptr);

}

void initVulkan() {

createInstance();

}

void mainLoop() {

while (!glfwWindowShouldClose(window)) {

glfwPollEvents();

}

}

void createInstance() {

VkApplicationInfo appInfo = {};

appInfo.sType = VK_STRUCTURE_TYPE_APPLICATION_INFO;

appInfo.pApplicationName = "Hello Triangle";

appInfo.applicationVersion = VK_MAKE_VERSION(1, 0, 0);

appInfo.pEngineName = "No Engine";

appInfo.engineVersion = VK_MAKE_VERSION(1, 0, 0);

appInfo.apiVersion = VK_API_VERSION_1_0;

VkInstanceCreateInfo createInfo = {};

createInfo.sType = VK_STRUCTURE_TYPE_INSTANCE_CREATE_INFO;

createInfo.pApplicationInfo = &appInfo;

unsigned int glfwExtensionCount = 0;

const char** glfwExtensions;

glfwExtensions = glfwGetRequiredInstanceExtensions(&glfwExtensionCount);

createInfo.enabledExtensionCount = glfwExtensionCount;

createInfo.ppEnabledExtensionNames = glfwExtensions;

createInfo.enabledLayerCount = 0;

if (vkCreateInstance(&createInfo, nullptr, &instance) != VK_SUCCESS) {

throw std::runtime_error("failed to create instance!");

}

}

};

int main() {

HelloTriangleApplication app;

try {

app.run();

} catch (const std::runtime_error& e) {

std::cerr << e.what() << std::endl;

return EXIT_FAILURE;

}

return EXIT_SUCCESS;

}