A simple monogame fps display class.

@willmotil wrote:

I was organizing my examples and thought i would post this for anyone who just wants a quick fps counter or to see how to do it.

Here is the game1 example of the class being used.
Its very simple to use 3 lines of code;

using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

namespace SimpleFpsCounter
{
    public class Game1 : Game
    {
        private GraphicsDeviceManager graphics;
        private SpriteBatch spriteBatch;
        SpriteFont font;
        KeyboardState previousState;
        
        // Add the class
        SimpleFps fps = new SimpleFps();

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        protected override void Initialize()
        {
            this.TargetElapsedTime = TimeSpan.FromSeconds(1d / 60d);
            this.IsFixedTimeStep = false;
            graphics.SynchronizeWithVerticalRetrace = false;
            graphics.ApplyChanges();
            base.Initialize();
        }

        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            font = Content.Load<SpriteFont>("PipeLineToolCreatedFont");
        }

        protected override void UnloadContent() { }

        protected override void Update(GameTime gameTime)
        {
            KeyboardState state = Keyboard.GetState();
            if (state.IsKeyDown(Keys.Escape))
                Exit();

            // Update the fps
            fps.Update(gameTime);

            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            GraphicsDevice.Clear(Color.Moccasin);

            spriteBatch.Begin();

            // Draw the fps msg
            fps.DrawFps(spriteBatch, font, new Vector2(10f, 10f), Color.MonoGameOrange);

            spriteBatch.End();

            base.Draw(gameTime);
        }
    }
}

Here is the class.
You can just add the class below the game1 class to test it.

using System;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace SimpleFpsCounter
{
    public class SimpleFps
    {
        private double frames = 0;
        private double updates = 0;
        private double elapsed = 0;
        private double last = 0;
        private double now = 0;
        public double msgFrequency = 1.0f; 
        public string msg = "";

        /// <summary>
        /// The msgFrequency here is the reporting time to update the message.
        /// </summary>
        public void Update(GameTime gameTime)
        {
            now = gameTime.TotalGameTime.TotalSeconds;
            elapsed = (double)(now - last);
            if (elapsed > msgFrequency)
            {
                msg = " Fps: " + (frames / elapsed).ToString() + "\n Elapsed time: " + elapsed.ToString() +  "\n Updates: " + updates.ToString() + "\n Frames: " + frames.ToString();
                //Console.WriteLine(msg);
                elapsed = 0;
                frames = 0;
                updates = 0;
                last = now;
            }
            updates++;
        }

        public void DrawFps(SpriteBatch spriteBatch, SpriteFont font, Vector2 fpsDisplayPosition, Color fpsTextColor)
        {
            spriteBatch.DrawString(font, msg, fpsDisplayPosition, fpsTextColor);
            frames++;
        }
}
}

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