Fix external textures being counted in object pool

UndertaleModLib/Models/UndertaleEmbeddedTexture.cs

@@ -15,15 +15,8 @@ namespace UndertaleModLib.Models;
 /// An embedded texture entry in the data file.
 /// </summary>
 [PropertyChanged.AddINotifyPropertyChangedInterface]
-public class UndertaleEmbeddedTexture : UndertaleNamedResource, IDisposable,
-                                        IStaticChildObjCount, IStaticChildObjectsSize
+public class UndertaleEmbeddedTexture : UndertaleNamedResource, IDisposable
 {
-    /// <inheritdoc cref="IStaticChildObjCount.ChildObjectCount" />
-    public static readonly uint ChildObjectCount = 1;
-
-    /// <inheritdoc cref="IStaticChildObjectsSize.ChildObjectsSize" />
-    public static readonly uint ChildObjectsSize = 4; // minimal size
-
     /// <summary>
     /// The name of the embedded texture entry.
     /// </summary>
@@ -196,6 +189,29 @@ public void UnserializeBlob(UndertaleReader reader)
         TextureLoaded = true;
     }
 
+    /// <inheritdoc cref="UndertaleObject.UnserializeChildObjectCount(UndertaleReader)"/>
+    public static uint UnserializeChildObjectCount(UndertaleReader reader)
+    {
+        uint count = 0;
+
+        reader.Position += 4; // "Scaled"
+        if (reader.undertaleData.IsVersionAtLeast(2, 0, 6))
+            reader.Position += 4; // "GeneratedMips"
+        if (reader.undertaleData.IsVersionAtLeast(2022, 3))
+            reader.Position += 4; // "_textureBlockSize"
+        if (reader.undertaleData.IsVersionAtLeast(2022, 9))
+            reader.Position += 12; // "TextureWidth", "TextureHeight", "IndexInGroup"
+
+        if (reader.ReadUInt32() != 0)
+        {
+            // If the texture data pointer isn't null, then this is an internal texture,
+            // which will create another object in the pool when reading the blob.
+            count++;
+        }
+
+        return count;
+    }
+
     /// <summary>
     /// Assigns texture group info to every embedded texture in the supplied data file.
     /// </summary>

UndertaleModLib/UndertaleChunks.cs

@@ -1431,17 +1431,6 @@ internal override uint UnserializeObjectCount(UndertaleReader reader)
 
             CheckFor2022_3And5(reader);
 
-            uint txtrSize = UndertaleEmbeddedTexture.ChildObjectsSize;
-            if (reader.undertaleData.IsVersionAtLeast(2, 0, 6))
-                txtrSize += 4; // "GeneratedMips"
-            if (reader.undertaleData.IsVersionAtLeast(2022, 3))
-                txtrSize += 4; // "TextureBlockSize"
-            if (reader.undertaleData.IsVersionAtLeast(2022, 9))
-                txtrSize += 12;
-
-            if (txtrSize != UndertaleEmbeddedTexture.ChildObjectsSize)
-                reader.SetStaticChildObjectsSize(typeof(UndertaleEmbeddedTexture), txtrSize);
-
             // Texture blobs are already included in the count
             return base.UnserializeObjectCount(reader);
         }