(657674526) Reallow changing resolution in fullscreen/borderless. TODO: test, disable in borderless because it seems to do nothing?

Barotrauma/BarotraumaClient/Source/GameMain.cs

@@ -236,8 +236,6 @@ namespace Barotrauma
 
             GraphicsDeviceManager.PreferredBackBufferWidth = GraphicsWidth;
             GraphicsDeviceManager.PreferredBackBufferHeight = GraphicsHeight;
-
-            GraphicsDeviceManager.ApplyChanges();
         }
 
         public void ResetViewPort()
@@ -255,7 +253,7 @@ namespace Barotrauma
         {
             base.Initialize();
 
-            ApplyGraphicsSettings();
+            RequestGraphicsSettings();
 
             ScissorTestEnable = new RasterizerState() { ScissorTestEnable = true };
 
@@ -294,6 +292,38 @@ namespace Barotrauma
 #endif
 
             loadingCoroutine = CoroutineManager.StartCoroutine(Load(canLoadInSeparateThread), "", canLoadInSeparateThread);
+
+#if WINDOWS
+            var gameForm = (System.Windows.Forms.Form)System.Windows.Forms.Form.FromHandle(Window.Handle);
+            gameForm.Activated += new EventHandler(HandleFocus);
+            gameForm.Deactivate += new EventHandler(HandleDefocus);
+            if (WindowActive) { HandleFocus(null, null); }
+#endif
+        }
+
+#if WINDOWS
+        private void HandleFocus(object sender, EventArgs e)
+        {
+            CoroutineManager.StopCoroutines("FocusCoroutine");
+            CoroutineManager.StartCoroutine(FocusCoroutine(),"FocusCoroutine");
+        }
+
+        private IEnumerable<object> FocusCoroutine()
+        {
+            yield return new WaitForSeconds(0.01f);
+            ApplyGraphicsSettings();
+            yield return CoroutineStatus.Success;
+        }
+
+        private void HandleDefocus(object sender, EventArgs e)
+        {
+            CoroutineManager.StopCoroutines("FocusCoroutine");
+            GraphicsDeviceManager.IsFullScreen = false;
+            GraphicsDeviceManager.ApplyChanges();
+        }
+#endif
+
+            loadingCoroutine = CoroutineManager.StartCoroutine(Load(canLoadInSeparateThread), "", canLoadInSeparateThread);
         }
         
         private void InitUserStats()