basic glfw app setup

src/Application.cpp

@@ -0,0 +1,47 @@
+#include "Application.hpp"
+
+#include <stdexcept>
+#include <sstream>
+#include <GLFW/glfw3.h>
+
+Application::~Application()
+{
+	if (window != nullptr) 
+	{
+		glfwDestroyWindow(window);
+		window = nullptr;
+	}
+
+	glfwTerminate();
+}
+
+void Application::Init(int width, int height, const std::string& title)
+{
+	if(window == nullptr)
+		glfwInit();
+
+	window = glfwCreateWindow(width, height, title.c_str(), NULL, NULL);
+	if (window == nullptr)
+	{
+		const char* errorbuf;
+		int errorcode = glfwGetError(&errorbuf);
+
+		glfwTerminate();
+
+		std::stringstream errorstream;
+		errorstream << "Failed to create GLFWwindow (" << errorcode << "): \n" << errorbuf << std::endl;
+		throw std::runtime_error(errorstream.str());
+	}
+
+	glfwMakeContextCurrent(window);
+}
+
+void Application::Launch()
+{
+	while (!glfwWindowShouldClose(window))
+	{
+		glfwPollEvents();
+
+		glfwSwapBuffers(window);
+	}
+}

src/Application.hpp

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <string>
+
+struct GLFWwindow;
+
+class Application
+{
+/////////////////////////////////////////////////////////
+////// SINGLETON BOILERPLATE ////////////////////////////
+/////////////////////////////////////////////////////////
+public:
+	static Application& Instance()
+	{
+		static Application app;
+		return app;
+	}
+
+
+private:
+	Application() = default;
+	~Application();
+	Application(const Application& other) = delete;
+
+/////////////////////////////////////////////////////////
+////// APPLICATION IMPLEMENTATION ///////////////////////
+/////////////////////////////////////////////////////////
+
+public:
+	void Init(int width, int height, const std::string& title);
+	void Launch();
+
+private:
+	GLFWwindow* window = nullptr;
+};

src/CMakeLists.txt

@@ -0,0 +1,7 @@
+add_executable(visualizer
+	"main.cpp" "Application.cpp"
+)
+
+target_include_directories(visualizer PUBLIC ${GLFW3_INCLUDE_DIRS})
+
+target_link_libraries(visualizer PUBLIC ${GLFW3_INCLUDE_DIRS})

src/main.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+#include "Application.hpp"
+
+int main(int argc, char** argv)
+{
+	Application& app = Application::Instance();
+
+	try
+	{
+		app.Init(800, 800, "Visualizer");
+	}
+	catch (const std::runtime_error& err)
+	{
+		std::cerr << "Application initialization failed\n\n" << err.what();
+		return 1;
+	}
+
+	app.Launch();
+
+	return 0;
+}