Implemented basic app framework

src/Application.cpp

@@ -0,0 +1,89 @@
+#include "Application.hpp"
+
+#include <iostream>
+#include <SDL.h>
+
+Application::Application(int width, int height, const char* title)
+{
+	window = SDL_CreateWindow(
+		title, 
+		SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 
+		width, height, 
+		SDL_WINDOW_SHOWN
+	);
+	if (window == nullptr)
+	{
+		char errbuf[512];
+		SDL_GetErrorMsg(errbuf, 512);
+
+		std::cerr << "Failed to create SDL Window: " << std::endl
+			<< errbuf << std::endl;
+
+		return;
+	}
+
+	// Let's just pretend we're the first application in this program to create a renderer :) what could go wrong
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+	if (renderer == nullptr)
+	{
+		char errbuf[512];
+		SDL_GetErrorMsg(errbuf, 512);
+
+		std::cerr << "Failed to create SDL Renderer: " << std::endl
+			<< errbuf << std::endl;
+
+		return;
+	}
+}
+
+Application::~Application()
+{
+	SDL_DestroyRenderer(renderer);	// Let's just destroy this renderer regardless of other applications in this program :) what could go wrong
+	SDL_DestroyWindow(window);
+}
+
+void Application::Launch()
+{
+	if (renderer == nullptr || window == nullptr)
+	{
+		throw std::runtime_error("Can't launch application. Window or Renderer is in invalid state.");
+	}
+
+	while (!shouldClose)
+	{
+		HandleEvents();
+		Update();
+		Render();
+	}
+}
+
+void Application::HandleEvents()
+{
+	static SDL_Event event;
+
+	while (SDL_PollEvent(&event))
+	{
+		if (event.type == SDL_WINDOWEVENT)
+		{
+			switch (event.window.event)
+			{
+			case SDL_WINDOWEVENT_CLOSE:
+				shouldClose = true;
+				break;
+			}
+		}
+	}
+}
+
+void Application::Update()
+{
+
+}
+
+void Application::Render()
+{
+	SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
+	SDL_RenderClear(renderer);
+
+	SDL_RenderPresent(renderer);
+}