From 214cc42c93e9a51f7dc66d99684d076c04a9d0a9 Mon Sep 17 00:00:00 2001
From: ktyl <me@ktyl.dev>
Date: Mon, 20 Mar 2023 21:06:56 +0000
Subject: [PATCH] create vulkan instance

---
 src/main.cpp | 126 +++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 101 insertions(+), 25 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 37e10ce..b9f24e1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,37 +1,113 @@
 #define GLFW_INCLUDE_VULKAN
 #include <GLFW/glfw3.h>
 
-#define GLM_FORCE_RADIANS
-#define GLM_FORCE_DEPth_ZERO_TO_ONE
-#include <glm/vec4.hpp>
-#include <glm/mat4x4.hpp>
-
 #include <iostream>
+#include <stdexcept>
+#include <cstdlib>
+#include <vector>
+
+const uint32_t WIDTH = 800;
+const uint32_t HEIGHT = 600;
+
+class HelloTriangleApplication
+{
+public:
+    void run()
+    {
+        initWindow();
+        initVulkan();
+        mainLoop();
+        cleanup();
+    }
+
+private:
+    GLFWwindow* _window;
+    VkInstance _instance;
+
+    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 cleanup()
+    {
+        vkDestroyInstance(_instance, nullptr);
+
+        glfwDestroyWindow(_window);
+        glfwTerminate();
+    }
+
+    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;
+
+        uint32_t 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!");
+        }
+
+        uint32_t extensionCount = 0;
+        std::vector<VkExtensionProperties> extensions(extensionCount);
+        vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, extensions.data());
+
+        std::cout << "available extensions: " << extensionCount << std::endl;
+
+        for (const auto& extension : extensions)
+        {
+            std::cout << '\t' << extension.extensionName << '\n';
+        }
+    }
+};
 
 int main()
 {
-    glfwInit();
+    HelloTriangleApplication app;
 
-    glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
-    GLFWwindow* window = glfwCreateWindow(800, 600, "Vulkan window", nullptr, nullptr);
-
-    uint32_t extensionCount = 0;
-    vkEnumerateInstanceExtensionProperties(nullptr, &extensionCount, nullptr);
-
-    std::cout << extensionCount << " extensions supported\n";
-
-    glm::mat4 matrix;
-    glm::vec4 vec;
-    auto test = matrix * vec;
-
-    while (!glfwWindowShouldClose(window))
+    try
     {
-        glfwPollEvents();
+        app.run();
+    }
+    catch(const std::exception& e)
+    {
+        std::cerr << e.what() << std::endl;
+        return EXIT_FAILURE;
     }
 
-    glfwDestroyWindow(window);
-
-    glfwTerminate();
-
-    return 0;
+    return EXIT_SUCCESS;
 }