sfml_opengl.cpp

#include <SFML/Window.hpp>
#include <SFML/OpenGL.hpp>
#include <SFML/Graphics.hpp>
int main()
{
    // create the window
    sf::RenderWindow window(sf::VideoMode(800, 600), "OpenGL", sf::Style::Default, sf::ContextSettings(32));
    window.setVerticalSyncEnabled(true);
    glClearColor(.2,.2,.2,0);
    // activate the window
    window.setActive(true);

    // load resources, initialize the OpenGL states, ...

    // run the main loop
    bool running = true;
    while (running)
    {
        // handle events
        sf::Event event;
        while (window.pollEvent(event))
        {
            if (event.type == sf::Event::Closed)
            {
                // end the program
                running = false;
            }
            else if (event.type == sf::Event::Resized)
            {
                // adjust the viewport when the window is resized
                window.setView(sf::View(sf::FloatRect(0, 0, event.size.width, event.size.height)));
                glViewport(0, 0, event.size.width, event.size.height);
            }
            else if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Escape)
                running = false;
        }

        // clear the buffers
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

        // draw...
        sf::RectangleShape rect(sf::Vector2f(200,200));
        rect.setPosition(20,50);
        rect.setFillColor(sf::Color(34,56,78));
        window.draw(rect);

        // end the current frame (internally swaps the front and back buffers)
        window.display();
    }

    // release resources...

    return 0;
}