Lag on left mouse button click on macOS #8011
Description
I am seeing a noticeable lag on left click using a very minimal example, on both M1 and Intel Macs. Full discussion here.
I did find settings needed to remove this (posted below), but it really doesn't seem like intended behavior.
If I apply both of these settings, it goes away:
GraphicsDeviceManager.SynchronizeWithVerticalRetrace = false
Game.IsFixedTimeStep = false
PS: Here are the results of all four combos of these settings:
- fixed timestep OFF, vsync OFF: Works great, no noticeable lag
- fixed timestep OFF, vsync ON: Small lag noticeable
- fixed timestep ON, vsync OFF: Significant lag
- fixed timestep ON, vsync ON: Significant lag
Full minimal example Game1.cs:
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
namespace MouseButtonLagTest;
public class Game1 : Game
{
private GraphicsDeviceManager _graphics;
private SpriteBatch _spriteBatch;
private Texture2D whiteTexture;
private MouseState currentMouseState;
public Game1()
{
_graphics = new GraphicsDeviceManager(this);
// leave all commented to see default behavior (lag)
// uncomment sections to see each case
// fixed timestep OFF, vsync OFF: Works great, no noticeable lag:
//IsFixedTimeStep = false;
//_graphics.SynchronizeWithVerticalRetrace = false;
// fixed timestep OFF, vsync ON: Small lag noticeable
//IsFixedTimeStep = false;
//_graphics.SynchronizeWithVerticalRetrace = true;
// fixed timestep ON, vsync OFF: Significant lag
//IsFixedTimeStep = true;
//_graphics.SynchronizeWithVerticalRetrace = false;
// fixed timestep ON, vsync ON: Significant lag
//IsFixedTimeStep = true;
//_graphics.SynchronizeWithVerticalRetrace = true;
_graphics.ApplyChanges();
Content.RootDirectory = "Content";
IsMouseVisible = true;
}
protected override void Initialize()
{
base.Initialize();
}
protected override void LoadContent()
{
_spriteBatch = new SpriteBatch(GraphicsDevice);
whiteTexture = new Texture2D(GraphicsDevice, 1, 1);
whiteTexture.SetData(new[] { Color.White });
}
protected override void Update(GameTime gameTime)
{
currentMouseState = Mouse.GetState();
base.Update(gameTime);
}
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
_spriteBatch.Begin();
_spriteBatch.Draw(
texture: whiteTexture,
position: currentMouseState.Position.ToVector2(),
sourceRectangle: null,
color: currentMouseState.LeftButton == ButtonState.Pressed ? Color.Red : Color.White,
rotation: 0f,
origin: Vector2.Zero,
scale: 10 * Vector2.One,
effects: SpriteEffects.None,
layerDepth: 1f
);
_spriteBatch.End();
base.Draw(gameTime);
}
}What version of MonoGame does the bug occur on:
- MonoGame 3.8.1
What operating system are you using:
- macOS (Intel), macOS (M1)
What MonoGame platform are you using:
- DesktopGL