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source/app/CMakeLists.txt

@@ -1,3 +1,16 @@
 project(UglyMain)
 
-add_executable(${PROJECT_NAME} main.c)
+add_executable(${PROJECT_NAME}
+    main.cpp
+    src/App.cpp
+)
+
+target_include_directories(${PROJECT_NAME}
+    PRIVATE ./src
+)
+
+target_link_libraries(${PROJECT_NAME}
+    GLEW::GLEW
+    glfw
+    glm::glm
+)

source/app/main.c

@@ -1,5 +0,0 @@
-#include <stdio.h>
-
-int main(void) {
-    printf("hello world!\n");
-}

source/app/main.cpp

@@ -0,0 +1,12 @@
+#include <iterator>
+#include <string>
+#include <vector>
+
+#include "App.hpp"
+
+
+int main(int argc, char *argv[]) {
+    auto args = std::vector<std::string>{};
+    std::copy_n(argv, argc, std::back_inserter(args));
+    return App::main(args);
+}

source/app/src/App.cpp

@@ -0,0 +1,63 @@
+#include "App.hpp"
+
+#include <cstdlib>
+#include <iostream>
+
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+
+
+int App::main(std::vector<std::string> &args) {
+    auto app = App{};
+    app.game_loop();
+    return EXIT_SUCCESS;
+}
+
+
+void App::error_callback_s(int error, const char *description)
+{
+    std::cerr << "[GLFW error]: " << description << '\n';
+    exit(EXIT_FAILURE);
+}
+
+
+void App::key_callback_s(GLFWwindow *window, int key, int scancode, int action, int mods) {
+    auto app = static_cast<App*>(glfwGetWindowUserPointer(window));
+    app->key_callback(key, scancode, action, mods);
+}
+
+
+App::App():
+    mpWindow{NULL} {
+    glfwSetErrorCallback(error_callback_s);
+    glfwInit();
+
+    mpWindow = glfwCreateWindow(640, 480, "uGLy", NULL, NULL);
+    glfwSetWindowUserPointer(mpWindow, this);
+    glfwSetKeyCallback(mpWindow, key_callback_s);
+
+    glfwMakeContextCurrent(mpWindow);
+    if(glewInit() != GLEW_OK) {
+        error_callback_s(GLFW_NO_ERROR, "glewInit() failed");
+    }
+}
+
+
+App::~App() {
+    glfwTerminate();
+    glfwSetErrorCallback(NULL);
+}
+
+
+void App::game_loop() {
+    while(!glfwWindowShouldClose(mpWindow)) {
+        glfwPollEvents();
+    }
+}
+
+
+void App::key_callback(int key, int scancode, int action, int mods) {
+    if(key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
+        glfwSetWindowShouldClose(mpWindow, GLFW_TRUE);
+    }
+}

source/app/src/App.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <string>
+#include <vector>
+
+struct GLFWwindow;
+
+class App {
+public:
+    static int main(std::vector<std::string> &args);
+private:
+    static void error_callback_s(int error, const char *description);
+    static void key_callback_s(GLFWwindow *window, int key, int scancode, int action, int mods);
+
+private:
+    GLFWwindow *mpWindow;
+
+private:
+    App();
+    ~App();
+    void game_loop();
+    void key_callback(int key, int scancode, int action, int mods);
+};