make new opengl source generator

src/StgSharp.Graphics/.discard/OpenGL.glRenderStream.ThreadSecurity.cs.old

@@ -0,0 +1,26 @@
+// -----------------------------------------------------------------------------
+// file="glRenderStream.ThreadSecurity"
+// Project: StgSharp
+// Copyright (c) Nitload.
+// SPDX-License-Identifier: MIT
+// -----------------------------------------------------------------------------
+
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace StgSharp.Graphics.OpenGL
+{
+    public partial class glRender
+    {
+
+        private static ConcurrentDictionary<Thread, glRender> threadLocalIndex
+            = new();
+        private readonly SynchronizationContext mainThreadContext = SynchronizationContext.Current;
+
+    }
+}