Fullscreen mode immediately reverts to windowed at runtime

[HuangMiu]

Hi,
I’m new to the Stride engine and I’m having trouble enabling fullscreen mode at runtime.
I‘m using Stride 4.3.0.2507.
No matter how I try, fullscreen only works for a single frame and then immediately reverts back to windowed mode.

I tried enabling fullscreen after the window is fully created, including triggering it from a UI button at runtime.

Game.Window.IsFullscreen = true;

Result:
The window switches to fullscreen for a brief moment.
Then immediately switches back to windowed mode.

Thank you very much for your help!

[mihai-ene-public]

Here's something that works for me

public static class GameExtensions
{
    public static void SetResolution(this Game game, int width, int height, FullscreenMode mode)
    {
        game.GraphicsDeviceManager.PreferredBackBufferWidth = width;
        game.GraphicsDeviceManager.PreferredBackBufferHeight = height;
        game.GraphicsDeviceManager.ApplyChanges();

        game.Window.IsFullscreen = mode == FullscreenMode.Fullscreen;
        game.Window.IsBorderLess = mode == FullscreenMode.Borderless;
        game.Window.AllowUserResizing = false;

        if (mode == FullscreenMode.Borderless)
        {
            game.Window.Position = new ();
        }
    }
}

public enum FullscreenMode
{
    Windowed,
    Fullscreen,
    Borderless
}

[mihai-ene-public]

called like the following (in my case borderless, but for you should be FullscreenMode.Fullscreen)

//set the resolution to the native one; use the desktop 0 as the main monitor
var adapterOutput = GraphicsDevice.Adapter.Outputs[0];
var currentMonitorResolution = adapterOutput.CurrentDisplayMode;
this.SetResolution(currentMonitorResolution.Width, currentMonitorResolution.Height, FullscreenMode.Borderless);

[HuangMiu]

Thank you for your help.
In my environment, all of your code works except for the line game.Window.IsFullscreen = mode == FullscreenMode.Fullscreen;
Interestingly, when I comment out that line, I can still achieve a fullscreen-like effect.

Thank you very much for your help!

[VaclavElias]

We have this docs in staging. Let me know if it is helpful https://stride-doc-staging.azurewebsites.net/latest/en/manual/graphics/window-configuration.html

[HuangMiu]

Thank you for your help.
In my environment, everything in the documentation works except Game.Window.IsFullscreen = true;.
When it is set to true, the window briefly switches to fullscreen and then immediately returns to windowed mode.
However, I can achieve a fullscreen-like effect using the following code instead.

public override void Start()
{
    // Initialization of the script.
    //Game.Window.IsFullscreen = true;
    //Game.Window.FullscreenIsBorderlessWindow = true;

    var game = Game as Game;

    var displayMode = game.GraphicsDevice.Adapter.Outputs[0].CurrentDisplayMode;
    game.GraphicsDeviceManager.PreferredBackBufferWidth = displayMode.Width;
    game.GraphicsDeviceManager.PreferredBackBufferHeight = displayMode.Height;
    game.GraphicsDeviceManager.ApplyChanges();

    //game.Window.IsFullscreen = true;
    game.Window.IsBorderLess = true;
    game.Window.Position = new(0, 0);
}

Thank you very much for your help.