From 0197ffc3ee6d56b1c5ca4d4b9a11efc55342518c Mon Sep 17 00:00:00 2001
From: UbitUmarov <ajlduarte@sapo.pt>
Date: Sat, 16 Aug 2025 01:42:39 +0100
Subject: [PATCH] add llGetRenderMaterial

---
 .../Shared/Api/Implementation/LSL_Api.cs      | 55 ++++++++++++++++++-
 .../Shared/Api/Interface/ILSL_Api.cs          |  1 +
 .../Shared/Api/Runtime/LSL_Stub.cs            |  5 ++
 3 files changed, 60 insertions(+), 1 deletion(-)

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 5cfb70d379..c048b7f6ef 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -2350,7 +2350,7 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         {
             if (face == ScriptBaseClass.ALL_SIDES)
                 face = 0;
-            if (face < 0)
+            else if (face < 0)
                 return ScriptBaseClass.NULL_KEY;
 
             Primitive.TextureEntry tex = part.Shape.Textures;
@@ -19508,6 +19508,59 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
             return new LSL_String();
         }
 
+        public LSL_String llGetRenderMaterial(LSL_Integer lface )
+        {
+            return GetMaterial(m_host, lface.value);
+        }
+
+        protected static LSL_String GetMaterial(SceneObjectPart part, int face)
+        {
+            if (part.Shape.RenderMaterials is null ||
+                    part.Shape.RenderMaterials.entries is null ||
+                    part.Shape.RenderMaterials.entries.Length == 0)
+                return ScriptBaseClass.NULL_KEY;
+
+            if (face == ScriptBaseClass.ALL_SIDES)
+                face = 0;
+            else if (face < 0)
+                return ScriptBaseClass.NULL_KEY;
+            else if (face >= GetNumberOfSides(part))
+                return ScriptBaseClass.NULL_KEY;
+
+            UUID asset = UUID.Zero;
+            bool found = false;
+            foreach(Primitive.RenderMaterials.RenderMaterialEntry re in part.Shape.RenderMaterials.entries)
+            {
+                if(re.te_index == face)
+                {
+                    asset = re.id;
+                    found = true;
+                    break;
+                }
+            }
+
+            if(!found)
+                 return ScriptBaseClass.NULL_KEY;
+
+            lock (part.TaskInventory)
+            {
+                part.TaskInventory.LockItemsForRead(true);
+                try
+                { 
+                    foreach (KeyValuePair<UUID, TaskInventoryItem> inv in part.TaskInventory)
+                    {
+                        if (inv.Value.Type == (int)AssetType.Material && inv.Value.AssetID.Equals(asset))
+                            return inv.Value.Name.ToString();
+                    }
+                }
+                finally { part.TaskInventory.LockItemsForRead(false); }
+            }
+
+            if((part.ParentGroup.EffectiveOwnerPerms & (uint)PermissionMask.All) != (uint)PermissionMask.All)
+                return ScriptBaseClass.NULL_KEY;
+
+            return asset.ToString();
+        }
         static string HMAC_SHA224(string key, string message)
         {
             const int blockSize = 64;
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/ILSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/ILSL_Api.cs
index 291ef69c10..54195ca971 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Interface/ILSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Interface/ILSL_Api.cs
@@ -534,5 +534,6 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api.Interfaces
                void llSetLinkSitFlags(LSL_Integer linknum, LSL_Integer flags);
          LSL_String llHMAC(LSL_String private_key, LSL_String message, LSL_String algo);
          LSL_String llComputeHash(LSL_String message, LSL_String algo);
+         LSL_String llGetRenderMaterial(LSL_Integer face);
     }
 }
diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/LSL_Stub.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/LSL_Stub.cs
index cb3ca6ebd6..2d7fc63060 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/LSL_Stub.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Runtime/LSL_Stub.cs
@@ -2882,5 +2882,10 @@ namespace OpenSim.Region.ScriptEngine.Shared.ScriptBase
             return m_LSL_Functions.llComputeHash(message, algo);
         }
 
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public LSL_String llGetRenderMaterial(LSL_Integer face)
+        {
+            return m_LSL_Functions.llGetRenderMaterial(face);
+        }
     }
 }