Rename Unload to Close to match Init-Close pattern

Vocaluxe/Base/CDraw.cs

@@ -91,11 +91,11 @@ namespace Vocaluxe.Base
         /// <summary>
         ///     Unloads the current driver, e.g. to switch to another one
         /// </summary>
-        public static void Unload()
+        public static void Close()
         {
             if (_Draw != null)
             {
-                _Draw.Unload();
+                _Draw.Close();
                 _Draw = null;
             }
         }

Vocaluxe/Lib/Draw/CDirect3D.cs

@@ -390,9 +390,9 @@ namespace Vocaluxe.Lib.Draw
         ///     Unloads all Textures and other objects used by Direct3D for rendering
         /// </summary>
         /// <returns></returns>
-        public override void Unload()
+        public override void Close()
         {
-            base.Unload();
+            base.Close();
             STexturedColoredVertex.DisposeDeclaration();
             _VertexBuffer.Dispose();
             _IndexBuffer.Dispose();

Vocaluxe/Lib/Draw/CDrawBaseWindows.cs

@@ -28,9 +28,9 @@ namespace Vocaluxe.Lib.Draw
         private SClientRect _Restore;
         protected Size _SizeBeforeMinimize;
 
-        public override void Unload()
+        public override void Close()
         {
-            base.Unload();
+            base.Close();
             try
             {
                 _Form.Close();

Vocaluxe/Lib/Draw/CDrawWinForm.cs

@@ -253,11 +253,11 @@ namespace Vocaluxe.Lib.Draw
             Close();
         }
 
-        public void Unload()
+        public new void Close()
         {
             try
             {
-                Close();
+                base.Close();
             }
             catch {}
             Dispose();

Vocaluxe/Lib/Draw/COpenGL.cs

@@ -240,9 +240,9 @@ namespace Vocaluxe.Lib.Draw
             return true;
         }
 
-        public override void Unload()
+        public override void Close()
         {
-            base.Unload();
+            base.Close();
             GL.DeleteFramebuffers(1, ref _FBO);
         }
 

Vocaluxe/Lib/Draw/CTextureProvider.cs

@@ -20,6 +20,7 @@ using System.Collections.Generic;
 using System.Diagnostics;
 using System.Drawing;
 using System.Drawing.Imaging;
+using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Threading;
@@ -116,7 +117,7 @@ namespace Vocaluxe.Lib.Draw
             return true;
         }
 
-        public virtual void Unload()
+        public virtual void Close()
         {
             _EnsureMainThread();
             lock (_Textures)
@@ -731,6 +732,8 @@ namespace Vocaluxe.Lib.Draw
             // 3) a) AddTexture(fileA) || b) EnqueueTexture(fileA) with a)getFromCache + b)getFromCache + a)addToCache + b)addToCache --> Only keep one copy
             // All solved with atomic get/add cache and _WaitForTextureLoaded
 
+            if (!File.Exists(filePath))
+                return null;
             CTextureRef textureRef;
             TTextureType texture = null;
             Task<Size> loader;

Vocaluxe/Lib/Draw/IDraw.cs

@@ -25,7 +25,7 @@ namespace Vocaluxe.Lib.Draw
     {
         bool Init();
         void MainLoop();
-        void Unload();
+        void Close();
 
         int GetScreenWidth();
         int GetScreenHeight();

Vocaluxe/Program.cs

@@ -270,7 +270,7 @@ namespace Vocaluxe
                 CVideo.Close();
                 CRecord.Close();
                 CSound.Close();
-                CDraw.Unload();
+                CDraw.Close();
                 GC.Collect(); // Do a GC run here before we close logs to have finalizers run
                 CLog.CloseAll(); // Do this last, so we get all log entries!
             }