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C-/C++-Quelltext

#include "Game.h"

Game* g_game = 0; //Das Objekt der Klasse Game

int main(int argc, char* argv[]) {
    g_game = new Game();

    g_game->init("Chapter 1", 100, 100, 640, 480, true);

    while(g_game->getRunning()) {
        g_game->handleEvents();
        g_game->update();
        g_game->render();
    }
    g_game->clean();

    return 0;
}

C-/C++-Quelltext

#ifndef __Game__
#define __Game__

#include <SDL.h>

class Game {
public:
    Game();
    ~Game();

    bool init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen);
    void render();
    void update();
    void handleEvents();
    void clean();
    //void showError(const char* error_msg);

    bool getRunning() { return m_bRunning; }

private:
    SDL_Window* m_pWindow;
    SDL_Renderer* m_pRenderer;
    bool m_bRunning;
};

#endif /*defined(__Game__)*/

C-/C++-Quelltext

#include "Game.h"

bool Game::init(const char* title, int xpos, int ypos, int width, int height, bool fullscreen) {
    // attempt to initialize SDL
    if(SDL_Init(SDL_INIT_EVERYTHING) == 0) {
        //showError("SDL init success\n");

        // init the window
        int flags = 0; //SDL_WINDOW_...
        if(fullscreen) {
            flags = SDL_WINDOW_FULLSCREEN;
        }
        m_pWindow = SDL_CreateWindow(title, xpos, ypos, width, height, flags);

        if(m_pWindow != 0) { // window init success
            //showError("window creation success\n");

            m_pRenderer = SDL_CreateRenderer(m_pWindow, -1, 0);
            if(m_pRenderer != 0) { // renderer init success
                //showError("renderer creation success\n");
                SDL_SetRenderDrawColor(m_pRenderer,255,255,255,255);
            } else {
                //showError("renderer init fail\n");
                return false; // renderer init fail
            }
        } else {
            //showError("window init fail\n");
            return false; // window init fail
        }
    } else {
        //showError("SDL init fail\n");
        return false; // SDL init fail
    }

    //showError("init success\n");
    m_bRunning = true; // everything inited successfully, start the main loop
    return true;
}

void Game::render() {
    SDL_RenderClear(m_pRenderer); // clear the renderer to the draw color
    SDL_RenderPresent(m_pRenderer); // draw to the screen
}

void Game::update() {}

void Game::handleEvents() {
    SDL_Event events;
    if(SDL_PollEvent(&events)) {
        switch (events.type) {
            case SDL_QUIT:
                m_bRunning = false;
            break;

            default:
            
            break;
        }
    }
}

void Game::clean() {
    //showError("cleaning game\n");
    SDL_DestroyWindow(m_pWindow);
    SDL_DestroyRenderer(m_pRenderer);
    SDL_Quit();
}

/*void Game::showError(const char* error_msg) {
    SDL_Window* errorWindow = SDL_CreateWindow(error_msg, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 200, 200, SDL_WINDOW_SHOWN);
    SDL_Renderer* errorRenderer = SDL_CreateRenderer(errorWindow, -1, 0);
    SDL_RenderClear(errorRenderer);
    SDL_RenderPresent(errorRenderer);
    SDL_DestroyWindow(errorWindow);
    SDL_DestroyRenderer(errorRenderer);
    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, error_msg , SDL_GetError(), nullptr);
}*/

C-/C++-Quelltext

Game::Game() {}
Game::~Game() {}