Gracefully Deal With Attempting to Initialize Graphics Before a Context is Available

[ilexp]

Summary

As outlined here, Duality will crash when attempting to create graphics resources before the graphics window has been opened. A typical example is inside the CorePlugin.InitPlugin method.

How to reproduce

• Implement a CorePlugin like this:

    public class SomeCorePlugin : CorePlugin
    {
        protected override void InitPlugin()
        {
            base.InitPlugin();
            new Texture();
        }
    }

Workaround

• Instead of using the plugin's InitPlugin method, perform the required operations in the first BeforeUpdate call.

Analysis

• The graphics backend should check whether there is a graphics context available when attempting to create native resources and throw an exception if not, alerting users about the issue and allowing them to fix it.