Fix drawing editor thumbnails when texture used by asset is using dynamic streaming

Source/Editor/Content/Proxy/CubeTextureProxy.cs

@@ -47,8 +47,6 @@ namespace FlaxEditor.Content
                 _preview = new CubeTexturePreview(false);
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/IESProfileProxy.cs

@@ -50,16 +50,12 @@ namespace FlaxEditor.Content
                     Offsets = Margin.Zero,
                 };
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            // Check if asset is streamed enough
+            return ThumbnailsModule.HasMinimumQuality((IESProfile)request.Asset);
-            var asset = (IESProfile)request.Asset;
-            return asset.ResidentMipLevels >= Mathf.Max(1, (int)(asset.MipLevels * ThumbnailsModule.MinimumRequiredResourcesQuality));
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/MaterialInstanceProxy.cs

@@ -55,8 +55,6 @@ namespace FlaxEditor.Content
                 _preview = new MaterialPreview(false);
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for dependant assets during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/MaterialProxy.cs

@@ -99,8 +99,6 @@ namespace FlaxEditor.Content
                 _preview = new MaterialPreview(false);
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for dependant assets during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/ModelProxy.cs

@@ -78,8 +78,6 @@ namespace FlaxEditor.Content
                 };
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/PrefabProxy.cs

@@ -113,8 +113,6 @@ namespace FlaxEditor.Content
                 _preview = new PrefabPreview(false);
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />
@@ -125,6 +123,7 @@ namespace FlaxEditor.Content
 
             // Check if asset is streamed enough
             var asset = (Prefab)request.Asset;
+            // TODO: check all prefab actors to have loaded resources (models/textures/etc.)
             return asset.IsLoaded;
         }
 

Source/Editor/Content/Proxy/SkinnedModelProxy.cs

@@ -101,8 +101,6 @@ namespace FlaxEditor.Content
                 _preview = new AnimatedModelPreview(false);
                 InitAssetPreview(_preview);
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/SpriteAtlasProxy.cs

@@ -50,16 +50,12 @@ namespace FlaxEditor.Content
                     Offsets = Margin.Zero,
                 };
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />
         public override bool CanDrawThumbnail(ThumbnailRequest request)
         {
-            // Check if asset is streamed enough
+            return ThumbnailsModule.HasMinimumQuality((SpriteAtlas)request.Asset);
-            var asset = (SpriteAtlas)request.Asset;
-            return asset.ResidentMipLevels >= Mathf.Max(1, (int)(asset.MipLevels * ThumbnailsModule.MinimumRequiredResourcesQuality));
         }
 
         /// <inheritdoc />

Source/Editor/Content/Proxy/TextureProxy.cs

@@ -50,8 +50,6 @@ namespace FlaxEditor.Content
                     Offsets = Margin.Zero,
                 };
             }
-
-            // TODO: disable streaming for asset during thumbnail rendering (and restore it after)
         }
 
         /// <inheritdoc />

Source/Editor/Content/Thumbnails/ThumbnailsModule.cs

@@ -122,39 +122,43 @@ namespace FlaxEditor.Content.Thumbnails
 
         internal static bool HasMinimumQuality(TextureBase asset)
         {
+            // Don't block thumbnails queue when texture fails to stream in (eg. unsupported format)
             if (asset.HasStreamingError)
-                return true; // Don't block thumbnails queue when texture fails to stream in (eg. unsupported format)
+                return true;
+
+            // Check if enough mip levels are loaded
             var mipLevels = asset.MipLevels;
             var minMipLevels = Mathf.Min(mipLevels, 7);
-            return asset.IsLoaded && asset.ResidentMipLevels >= Mathf.Max(minMipLevels, (int)(mipLevels * MinimumRequiredResourcesQuality));
+            if (asset.IsLoaded && asset.ResidentMipLevels >= Mathf.Max(minMipLevels, (int)(mipLevels * MinimumRequiredResourcesQuality)))
+                return true;
+
+            // Inform streaming about resource usage to stream it in for the thumbnail
+            asset.SetStreamingVisible();
+
+            return false;
         }
 
-        internal static bool HasMinimumQuality(Model asset)
+        internal static bool HasMinimumQuality(ModelBase asset)
         {
             if (!asset.IsLoaded)
                 return false;
-            var lods = asset.LODs.Length;
+            var lods = asset.LODsCount;
             var slots = asset.MaterialSlots;
-            foreach (var slot in slots)
-            {
-                if (slot.Material && !HasMinimumQuality(slot.Material))
-                    return false;
-            }
-            return asset.LoadedLODs >= Mathf.Max(1, (int)(lods * MinimumRequiredResourcesQuality));
-        }
 
-        internal static bool HasMinimumQuality(SkinnedModel asset)
+            // Check if all materials are loaded (incl. dependent resources)
-        {
-            var lods = asset.LODs.Length;
-            if (asset.IsLoaded && lods == 0)
-                return true; // Skeleton-only model
-            var slots = asset.MaterialSlots;
             foreach (var slot in slots)
             {
                 if (slot.Material && !HasMinimumQuality(slot.Material))
                     return false;
             }
-            return asset.LoadedLODs >= Mathf.Max(1, (int)(lods * MinimumRequiredResourcesQuality));
+
+            // Check if enough LODs are loaded
+            if (asset.LoadedLODs >= Mathf.Max(1, (int)(lods * MinimumRequiredResourcesQuality)))
+                return true;
+
+            // TODO: impl SetStreamingVisible for models similar to textures (ModelsStreamingHandler needs to use it)
+
+            return false;
         }
 
         internal static bool HasMinimumQuality(MaterialBase asset)

Source/Engine/Graphics/Textures/TextureBase.cpp

@@ -302,6 +302,12 @@ bool TextureBase::HasStreamingError() const
     return _texture.Streaming.Error;
 }
 
+void TextureBase::SetStreamingVisible() const
+{
+    if (_texture.GetTexture())
+        _texture.GetTexture()->LastRenderTime = Platform::GetTimeSeconds();
+}
+
 BytesContainer TextureBase::GetMipData(int32 mipIndex, int32& rowPitch, int32& slicePitch)
 {
     BytesContainer result;

Source/Engine/Graphics/Textures/TextureBase.h

@@ -153,6 +153,11 @@ public:
     /// </summary>
     API_PROPERTY() bool HasStreamingError() const;
 
+    /// <summary>
+    /// Sets the texture as visible this frame to inform streaming about usage which will stream boost its priority for the streaming.
+    /// </summary>
+    API_FUNCTION() void SetStreamingVisible() const;
+
 public:
     /// <summary>
     /// Gets the mip data.