From b5326160b937ea503c7e567aa43a289021b8a68a Mon Sep 17 00:00:00 2001
From: Martin <mautner@vrvis.at>
Date: Tue, 18 Jun 2024 15:48:10 +0200
Subject: [PATCH] Fix untyped Array.Copy() for multidimensional arrays

---
 .../Extensions/NonGenericArray.cs             | 27 ++++++++++++++-----
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/src/Aardvark.Base/Extensions/NonGenericArray.cs b/src/Aardvark.Base/Extensions/NonGenericArray.cs
index 92553254..a1e34c0c 100644
--- a/src/Aardvark.Base/Extensions/NonGenericArray.cs
+++ b/src/Aardvark.Base/Extensions/NonGenericArray.cs
@@ -7,6 +7,7 @@ public static class NonGenericArrayExtensions
     {
 		#region Non-Generic Array
 
+		[Obsolete]
 		private static readonly Dictionary<Type, Func<Array, Array>> CopyFunMap =
 			new Dictionary<Type, Func<Array, Array>>
 			{
@@ -44,12 +45,25 @@ public static class NonGenericArrayExtensions
 				{ typeof(V4d[]), a => ((V4d[])a).Copy() },
 			};
 
-		public static Array Copy(this Array array)
-		{
-			return CopyFunMap[array.GetType()](array);
-		}
+        /// <summary>
+        /// Creates a copy of the array.
+        /// </summary>
+        public static Array Copy(this Array array)
+        {
+            var counts = new long[array.Rank];
+
+            for (int i = 0; i < counts.Length; i++)
+            {
+                counts[i] = array.GetLongLength(i);
+            }
+
+            var result = Array.CreateInstance(array.GetType().GetElementType(), counts);
+            Array.Copy(array, result, array.LongLength);
+            return result;
+        }
 
-		private static readonly Dictionary<Type, Func<Array, object, Array>> CopyFunFunMap =
+        [Obsolete]
+        private static readonly Dictionary<Type, Func<Array, object, Array>> CopyFunFunMap =
 			new Dictionary<Type, Func<Array, object, Array>>
 			{
 				{ typeof(byte[]), (a, f) => ((byte[])a).Map((Func<byte,byte>)f) },
@@ -86,7 +100,8 @@ public static Array Copy(this Array array)
 				{ typeof(V4d[]), (a, f) => ((V4d[])a).Map((Func<V4d,V4d>)f) },
 			};
 
-		public static Array Copy<T>(this Array array,
+        [Obsolete("Anybody using this?")]
+        public static Array Copy<T>(this Array array,
 									Func<T, T> funOfElementTypeToElementType,
 									Func<Array, Array> defaultFun = null)
 		{