Generate Covers for songs

Output/Cover/Blue.xml

@@ -7,7 +7,7 @@
 	</Info>
 	<!--Cover definitions when a category is missing a cover-->
 	<CoverGenerator1>
-		<!--Possible types are: Default, Artist, Letter, Edition, Genre, Language, Year, Decade, Date -->
+		<!--Possible types are: Default, Song, Artist, Letter, Edition, Genre, Language, Year, Decade, Date -->
 		<Type>Default</Type>
 		<Text>
 			<!--<Text>: Text to be shown, %TEXT% will be replace by the category name-->

Vocaluxe/Base/CMain.cs

@@ -871,6 +871,11 @@ namespace Vocaluxe.Base
         {
             return CCover.NoCover;
         }
+
+        public CTextureRef GenerateCover(string text, ECoverGeneratorType type, CSong firstSong)
+        {
+            return CCover.GenerateCover(text, type, firstSong);
+        }
     }
 
     class CBdataBase : IDataBase

Vocaluxe/Lib/Draw/CTextureProvider.cs

@@ -833,23 +833,26 @@ namespace Vocaluxe.Lib.Draw
 
         public CTextureRef CopyTexture(CTextureRef textureRef)
         {
-            _EnsureMainThread();
-            TTextureType texture;
-            if (!_GetTexture(textureRef, out texture, false))
-                return null;
-            // If bitmap is not yet loaded, wait for it
-            if (!String.IsNullOrEmpty(texture.TexturePath))
+            // Lock to make sure the texture is not disposed while we are in this method
+            lock (_Textures)
             {
-                Task<Size> loader;
-                lock (_BitmapsLoading)
+                TTextureType texture;
+                if (!_GetTexture(textureRef, out texture, false))
+                    return null;
+                // If bitmap is not yet loaded, wait for it
+                if (!String.IsNullOrEmpty(texture.TexturePath))
                 {
-                    _BitmapsLoading.TryGetValue(texture.TexturePath, out loader);
+                    Task<Size> loader;
+                    lock (_BitmapsLoading)
+                    {
+                        _BitmapsLoading.TryGetValue(texture.TexturePath, out loader);
+                    }
+                    if (loader != null)
+                        textureRef.OrigSize = loader.Result;
                 }
-                if (loader != null)
-                    textureRef.OrigSize = loader.Result;
+                Debug.Assert(textureRef.OrigSize.Width > 0);
+                return _GetTextureReference(textureRef.OrigSize, texture);
             }
-            Debug.Assert(textureRef.OrigSize.Width > 0);
-            return _GetTextureReference(textureRef.OrigSize, texture);
         }
 
         /// <summary>

VocaluxeLib/IBasic.cs

@@ -283,6 +283,7 @@ namespace VocaluxeLib
     public interface ICover
     {
         CTextureRef GetNoCover();
+        CTextureRef GenerateCover(string text, ECoverGeneratorType type, CSong firstSong);
     }
 
     public interface IDataBase

VocaluxeLib/Songs/CSong.cs

@@ -314,11 +314,10 @@ namespace VocaluxeLib.Songs
                 return;
             if (CoverFileName != "")
             {
-                if (!CBase.DataBase.GetCover(Path.Combine(Folder, CoverFileName), ref _CoverTextureSmall, CBase.Config.GetCoverSize()))
-                    _CoverTextureSmall = CBase.Cover.GetNoCover();
+                if (CBase.DataBase.GetCover(Path.Combine(Folder, CoverFileName), ref _CoverTextureSmall, CBase.Config.GetCoverSize()))
+                    return;
             }
-            else
-                _CoverTextureSmall = CBase.Cover.GetNoCover();
+            _CoverTextureSmall = CBase.Cover.GenerateCover(Title, ECoverGeneratorType.Song, null);
         }
 
         private void _CheckFiles()

VocaluxeLib/Structs.cs

@@ -29,6 +29,7 @@ namespace VocaluxeLib
     public enum ECoverGeneratorType
     {
         Default,
+        Song,
         Folder,
         Artist,
         Letter,