DesktopGL - Linux Errors

Kimimaru · April 4, 2018, 3:39am

I’m deploying a DesktopGL project built in Windows to Linux with MonoKickstart, and I’m running into a couple of problems. I want to start by mentioning that I’m running Ubuntu on a VM, but the same errors occurred on hardware running Ubuntu when I had someone else test.

SDL 2.0.4 does not support changing resizable parameter of the window after it’s already been created, please use a newer version of it.

This occurs because I allow window resizing in the Game constructor. MonoGame’s fork of MonoKickstart hasn’t been updated to the latest binaries; how would I go about updating the Linux ones?

If I comment out the window resizing line, I get a different error.

Failed to create graphics device!
Microsoft.Xna.Framework.GraphicsDeviceManager.CreateDevice () [0x00000] in :0
atMicrosoft.Xna.Framework.GraphicsDeviceManager.Microsoft.Xna.Framework.IGraphicsDeviceManager.CreateDevice () [0x00000] in :0 at Microsoft.Xna.Framework.Game.DoInitialize () [0x00000] in :0 at Microsoft.Xna.Framework.Game.Run (GameRunBehavior runBehavior) [0x00000] in :0 at Microsoft.Xna.Framework.Game.Run () [0x00000] in :0

To clarify, these both occur when the game runs and gets into my code. I’ve consistently had issues getting Linux builds to run, so I’m unsure what I need to do to fix things. You can see my Game1 class (called Engine.cs in my engine) here:

github.com

tdeeb/TDMonoGameEngine/blob/master/BaseMonoGameEngine/BaseMonoGameEngine/Engine.cs

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

namespace TDMonoGameEngine
{
    /// <summary>
    /// The entry point to the engine.
    /// </summary>
    public class Engine : Game
    {
        //Delegate and event for losing window focus
        public delegate void OnLostFocus();

        /// <summary>
        /// The event invoked when the window loses focus. This is invoked at the start of the update loop.
        /// </summary>

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All help is greatly appreciated in advance!

harry-cpp · April 4, 2018, 11:03am

MonoGame requires SDL 2.0.5 or higher to run. Generate a new set of templates and copy the libraries from there or reference the devel nuget to get it.

Devel nuget feed: http://teamcity.monogame.net/guestAuth/app/nuget/v1/FeedService.svc/

Kimimaru · April 4, 2018, 8:25pm

Thanks for the reply! To clarify, I’m running on Windows and want the updated Linux libraries. By generate a new set of templates, do you mean create a new DesktopGL project? Would I do this on Windows or Linux?

I’m leaning towards the nuget approach, but I’ve only ever used it once to install a JSON package and my search left me empty-handed in how to reference the link you posted to get the libraries. It doesn’t recognize it as a package, and nuget add -Source doesn’t work with http sources. It’s not clear to me which nuget command will allow me to reference this feed.

harry-cpp · April 4, 2018, 10:52pm

Yes.
Works on both.

You can add the nuget deed in the IDE (Visual Studio or MonoDevelop), Google it, also fixed my link since I copied the wrong one.

Kimimaru · April 4, 2018, 11:13pm

Thanks so much! I ended up copying the libraries from my DesktopGL project and moved any graphics device-related code from Initialize() to the constructor and it works now.