sneak/DesktopGL/DesktopGLProgram.cs

using Microsoft.Xna.Framework;
using System;

namespace SemiColinGames {

  public class DesktopGLDisplay : IDisplay {
    private GameWindow window;
    private GraphicsDeviceManager graphics;

    public void Initialize(GameWindow window, GraphicsDeviceManager graphics) {
      this.window = window;
      this.graphics = graphics;
      window.Title = "Sneak";
    }

    public void SetFullScreen(bool fullScreen) {
      if (fullScreen) {
        // In DesktopGL, we misappropriate "fullscreen" to be "the settings good for recording
        // gameplay GIFs".
        window.IsBorderless = true;
        // graphics.PreferredBackBufferWidth = 720;
        // graphics.PreferredBackBufferHeight = 405;
        graphics.PreferredBackBufferWidth = graphics.GraphicsDevice.DisplayMode.Width;
        graphics.PreferredBackBufferHeight = graphics.GraphicsDevice.DisplayMode.Height;
      } else {
        window.IsBorderless = false;
        graphics.PreferredBackBufferWidth = 1280;
        graphics.PreferredBackBufferHeight = 720;
      }
      Debug.WriteLine("display: {0}x{1}, fullscreen={2}",
        graphics.PreferredBackBufferWidth,
        graphics.PreferredBackBufferHeight,
        fullScreen);
      graphics.ApplyChanges();
    }
  }

  public static class DesktopGLProgram {
    [STAThread]
    static void Main() {
      using (var game = new SneakGame()) {
        game.Services.AddService(typeof(IDisplay), new DesktopGLDisplay());
        game.Run();
      }
    }
  }
}