Merge branch 'master' into careminster

Conflicts:
	OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
	bin/OpenMetaverse.StructuredData.XML
	bin/OpenMetaverse.XML
	bin/OpenMetaverseTypes.XML

3 files changed, 620 insertions, 12 deletions

diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index f8b9352..166dcda 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -823,12 +823,15 @@ namespace OpenSim.Region.ClientStack.LindenUDP
             handshake.RegionInfo3.ProductName = Util.StringToBytes256(regionInfo.RegionType);
             handshake.RegionInfo3.ProductSKU = Utils.EmptyBytes;
 
-            handshake.RegionInfo4 = new RegionHandshakePacket.RegionInfo4Block[0];
-//            OutPacket(handshake, ThrottleOutPacketType.Task);
-            // use same as MoveAgentIntoRegion (both should be task )
+            handshake.RegionInfo4 = new RegionHandshakePacket.RegionInfo4Block[1];
+            handshake.RegionInfo4[0] = new RegionHandshakePacket.RegionInfo4Block();
+            handshake.RegionInfo4[0].RegionFlagsExtended = args.regionFlags;
+            handshake.RegionInfo4[0].RegionProtocols = 0; // 1 here would indicate that SSB is supported
+
             OutPacket(handshake, ThrottleOutPacketType.Unknown);
         }
 
+
         public void MoveAgentIntoRegion(RegionInfo regInfo, Vector3 pos, Vector3 look)
         {
             AgentMovementCompletePacket mov = (AgentMovementCompletePacket)PacketPool.Instance.GetPacket(PacketType.AgentMovementComplete);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index ec7c3fa..9e644aa 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -5005,6 +5005,14 @@ namespace OpenSim.Region.Framework.Scenes
                 oldTex.DefaultTexture = fallbackOldFace;
             }
 
+            // Materials capable viewers can send a ObjectImage packet
+            // when nothing in TE has changed. MaterialID should be updated
+            // by the RenderMaterials CAP handler, so updating it here may cause a
+            // race condtion. Therefore, if no non-materials TE fields have changed, 
+            // we should ignore any changes and not update Shape.TextureEntry
+
+            bool otherFieldsChanged = false;
+
             for (int i = 0 ; i < GetNumberOfSides(); i++)
             {
 
@@ -5031,18 +5039,36 @@ namespace OpenSim.Region.Framework.Scenes
                 // Max change, skip the rest of testing
                 if (changeFlags == (Changed.TEXTURE | Changed.COLOR))
                     break;
+
+                if (!otherFieldsChanged)
+                {
+                    if (oldFace.Bump != newFace.Bump) otherFieldsChanged = true;
+                    if (oldFace.Fullbright != newFace.Fullbright) otherFieldsChanged = true;
+                    if (oldFace.Glow != newFace.Glow) otherFieldsChanged = true;
+                    if (oldFace.MediaFlags != newFace.MediaFlags) otherFieldsChanged = true;
+                    if (oldFace.OffsetU != newFace.OffsetU) otherFieldsChanged = true;
+                    if (oldFace.OffsetV != newFace.OffsetV) otherFieldsChanged = true;
+                    if (oldFace.RepeatU != newFace.RepeatU) otherFieldsChanged = true;
+                    if (oldFace.RepeatV != newFace.RepeatV) otherFieldsChanged = true;
+                    if (oldFace.Rotation != newFace.Rotation) otherFieldsChanged = true;
+                    if (oldFace.Shiny != newFace.Shiny) otherFieldsChanged = true;
+                    if (oldFace.TexMapType != newFace.TexMapType) otherFieldsChanged = true;
+                }
             }
 
-            m_shape.TextureEntry = newTex.GetBytes();
-            if (changeFlags != 0)
-                TriggerScriptChangedEvent(changeFlags);
-            UpdateFlag = UpdateRequired.FULL;
-            ParentGroup.HasGroupChanged = true;
+            if (changeFlags != 0 || otherFieldsChanged)
+            {
+                m_shape.TextureEntry = newTex.GetBytes();
+                if (changeFlags != 0)
+                    TriggerScriptChangedEvent(changeFlags);
+                UpdateFlag = UpdateRequired.FULL;
+                ParentGroup.HasGroupChanged = true;
 
-            //This is madness..
-            //ParentGroup.ScheduleGroupForFullUpdate();
-            //This is sparta
-            ScheduleFullUpdate();
+                //This is madness..
+                //ParentGroup.ScheduleGroupForFullUpdate();
+                //This is sparta
+                ScheduleFullUpdate();
+            }
         }
 
 
diff --git a/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs b/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs
new file mode 100644
index 0000000..4ab6609
--- /dev/null
+++ b/OpenSim/Region/OptionalModules/Materials/MaterialsDemoModule.cs
@@ -0,0 +1,579 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSimulator Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Reflection;
+using System.Security.Cryptography; // for computing md5 hash
+using log4net;
+using Mono.Addins;
+using Nini.Config;
+
+using OpenMetaverse;
+using OpenMetaverse.StructuredData;
+
+using OpenSim.Framework;
+using OpenSim.Framework.Servers;
+using OpenSim.Framework.Servers.HttpServer;
+using OpenSim.Region.Framework.Interfaces;
+using OpenSim.Region.Framework.Scenes;
+
+using Ionic.Zlib;
+
+// You will need to uncomment these lines if you are adding a region module to some other assembly which does not already
+// specify its assembly.  Otherwise, the region modules in the assembly will not be picked up when OpenSimulator scans
+// the available DLLs
+//[assembly: Addin("MaterialsDemoModule", "1.0")]
+//[assembly: AddinDependency("OpenSim", "0.5")]
+
+namespace OpenSim.Region.OptionalModules.MaterialsDemoModule
+{
+    /// <summary>
+    ///
+    //   #    #    ##    #####   #    #     #    #    #   ####
+    //   #    #   #  #   #    #  ##   #     #    ##   #  #    #
+    //   #    #  #    #  #    #  # #  #     #    # #  #  #
+    //   # ## #  ######  #####   #  # #     #    #  # #  #  ###
+    //   ##  ##  #    #  #   #   #   ##     #    #   ##  #    #
+    //   #    #  #    #  #    #  #    #     #    #    #   ####
+    //
+    //   THIS MODULE IS FOR EXPERIMENTAL USE ONLY AND MAY CAUSE REGION OR ASSET CORRUPTION!
+    //
+    //////////////  WARNING  //////////////////////////////////////////////////////////////////
+    /// This is an *Experimental* module for developing support for materials-capable viewers
+    /// This module should NOT be used in a production environment! It may cause data corruption and
+    /// viewer crashes. It should be only used to evaluate implementations of materials.
+    /// 
+    /// Materials are persisted via SceneObjectPart.dynattrs. This is a relatively new feature
+    /// of OpenSimulator and is not field proven at the time this module was written. Persistence
+    /// may fail or become corrupt and this could cause viewer crashes due to erroneous materials
+    /// data being sent to viewers. Materials descriptions might survive IAR, OAR, or other means
+    /// of archiving however the texture resources used by these materials probably will not as they
+    /// may not be adequately referenced to ensure proper archiving.
+    /// 
+    /// 
+    /// 
+    /// To enable this module, add this string at the bottom of OpenSim.ini:
+    /// [MaterialsDemoModule]
+    /// 
+    /// </summary>
+    /// 
+
+    [Extension(Path = "/OpenSim/RegionModules", NodeName = "RegionModule", Id = "MaterialsDemoModule")]
+    public class MaterialsDemoModule : INonSharedRegionModule
+    {
+        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
+        
+        public string Name { get { return "MaterialsDemoModule"; } }        
+        
+        public Type ReplaceableInterface { get { return null; } }
+
+        private Scene m_scene = null;
+        private bool m_enabled = false;
+
+        public Dictionary<UUID, OSDMap> m_knownMaterials = new Dictionary<UUID, OSDMap>();
+        
+        public void Initialise(IConfigSource source)
+        {
+            m_enabled = (source.Configs["MaterialsDemoModule"] != null);
+            if (!m_enabled)
+                return;
+
+            m_log.DebugFormat("[MaterialsDemoModule]: INITIALIZED MODULE");
+        }
+        
+        public void Close()
+        {
+            if (!m_enabled)
+                return;
+
+            m_log.DebugFormat("[MaterialsDemoModule]: CLOSED MODULE");
+        }
+        
+        public void AddRegion(Scene scene)
+        {
+            if (!m_enabled)
+                return;
+
+            m_log.DebugFormat("[MaterialsDemoModule]: REGION {0} ADDED", scene.RegionInfo.RegionName);
+            m_scene = scene;
+            m_scene.EventManager.OnRegisterCaps += new EventManager.RegisterCapsEvent(OnRegisterCaps);
+            m_scene.EventManager.OnObjectAddedToScene += new Action<SceneObjectGroup>(EventManager_OnObjectAddedToScene);
+        }
+
+        void EventManager_OnObjectAddedToScene(SceneObjectGroup obj)
+        {
+            foreach (var part in obj.Parts)
+                if (part != null)
+                    GetStoredMaterialsForPart(part);
+        }
+
+        void OnRegisterCaps(OpenMetaverse.UUID agentID, OpenSim.Framework.Capabilities.Caps caps)
+        {
+            string capsBase = "/CAPS/" + caps.CapsObjectPath;
+
+            IRequestHandler renderMaterialsPostHandler = new RestStreamHandler("POST", capsBase + "/", RenderMaterialsPostCap);
+            caps.RegisterHandler("RenderMaterials", renderMaterialsPostHandler);
+
+            // OpenSimulator CAPs infrastructure seems to be somewhat hostile towards any CAP that requires both GET
+            // and POST handlers, (at least at the time this was originally written), so we first set up a POST
+            // handler normally and then add a GET handler via MainServer
+
+            IRequestHandler renderMaterialsGetHandler = new RestStreamHandler("GET", capsBase + "/", RenderMaterialsGetCap);
+            MainServer.Instance.AddStreamHandler(renderMaterialsGetHandler);
+
+            // materials viewer seems to use either POST or PUT, so assign POST handler for PUT as well
+            IRequestHandler renderMaterialsPutHandler = new RestStreamHandler("PUT", capsBase + "/", RenderMaterialsPostCap);
+            MainServer.Instance.AddStreamHandler(renderMaterialsPutHandler);
+        }
+        
+        public void RemoveRegion(Scene scene)
+        {
+            if (!m_enabled)
+                return;
+
+            m_log.DebugFormat("[MaterialsDemoModule]: REGION {0} REMOVED", scene.RegionInfo.RegionName);
+        }        
+        
+        public void RegionLoaded(Scene scene)
+        {
+        }
+
+        OSDMap GetMaterial(UUID id)
+        {
+            OSDMap map = null;
+            if (m_knownMaterials.ContainsKey(id))
+            {
+                map = new OSDMap();
+                map["ID"] = OSD.FromBinary(id.GetBytes());
+                map["Material"] = m_knownMaterials[id];
+            }
+            return map;
+        }
+
+        void GetStoredMaterialsForPart(SceneObjectPart part)
+        { 
+            OSDMap OSMaterials = null;
+            OSDArray matsArr = null;
+
+            if (part.DynAttrs == null)
+            {
+                m_log.Warn("[MaterialsDemoModule]: NULL DYNATTRS :( ");
+            }
+
+            lock (part.DynAttrs)
+            {
+                if (part.DynAttrs.ContainsKey("OS:Materials"))
+                    OSMaterials = part.DynAttrs["OS:Materials"];
+                if (OSMaterials != null && OSMaterials.ContainsKey("Materials"))
+                {
+
+                    OSD osd = OSMaterials["Materials"];
+                    if (osd is OSDArray)
+                        matsArr = osd as OSDArray;
+                }
+            }
+
+            if (OSMaterials == null)
+                return;
+
+            m_log.Info("[MaterialsDemoModule]: OSMaterials: " + OSDParser.SerializeJsonString(OSMaterials));
+
+
+            if (matsArr == null)
+            {
+                m_log.Info("[MaterialsDemoModule]: matsArr is null :( ");
+                return;
+            }
+
+            foreach (OSD elemOsd in matsArr)
+            {
+                if (elemOsd != null && elemOsd is OSDMap)
+                {
+
+                    OSDMap matMap = elemOsd as OSDMap;
+                    if (matMap.ContainsKey("ID") && matMap.ContainsKey("Material"))
+                    {
+                        try
+                        {
+                            m_knownMaterials[matMap["ID"].AsUUID()] = (OSDMap)matMap["Material"];
+                        }
+                        catch (Exception e)
+                        {
+                            m_log.Warn("[MaterialsDemoModule]: exception decoding persisted material: " + e.ToString());
+                        }
+                    }
+                }
+            }
+        }
+
+        
+        void StoreMaterialsForPart(SceneObjectPart part)
+        {
+            try
+            {
+                if (part == null || part.Shape == null)
+                    return;
+
+                Dictionary<UUID, OSDMap> mats = new Dictionary<UUID, OSDMap>();
+
+                Primitive.TextureEntry te = part.Shape.Textures;
+
+                if (te.DefaultTexture != null)
+                {
+                    if (m_knownMaterials.ContainsKey(te.DefaultTexture.MaterialID))
+                        mats[te.DefaultTexture.MaterialID] = m_knownMaterials[te.DefaultTexture.MaterialID];
+                }
+
+                if (te.FaceTextures != null)
+                {
+                    foreach (var face in te.FaceTextures)
+                    {
+                        if (face != null)
+                        {
+                            if (m_knownMaterials.ContainsKey(face.MaterialID))
+                                mats[face.MaterialID] = m_knownMaterials[face.MaterialID];
+                        }
+                    }
+                }
+                if (mats.Count == 0)
+                    return;
+
+                OSDArray matsArr = new OSDArray();
+                foreach (KeyValuePair<UUID, OSDMap> kvp in mats)
+                {
+                    OSDMap matOsd = new OSDMap();
+                    matOsd["ID"] = OSD.FromUUID(kvp.Key);
+                    matOsd["Material"] = kvp.Value;
+                    matsArr.Add(matOsd);
+                }
+
+                OSDMap OSMaterials = new OSDMap();
+                OSMaterials["Materials"] = matsArr;
+
+                lock (part.DynAttrs)
+                    part.DynAttrs["OS:Materials"] = OSMaterials;
+            }
+            catch (Exception e)
+            {
+                m_log.Warn("[MaterialsDemoModule]: exception in StoreMaterialsForPart(): " + e.ToString());
+            }
+        }
+
+
+        public string RenderMaterialsPostCap(string request, string path,
+                string param, IOSHttpRequest httpRequest,
+                IOSHttpResponse httpResponse)
+        {
+            m_log.Debug("[MaterialsDemoModule]: POST cap handler");
+
+            OSDMap req = (OSDMap)OSDParser.DeserializeLLSDXml(request);
+            OSDMap resp = new OSDMap();
+
+            OSDMap materialsFromViewer = null;
+
+            OSDArray respArr = new OSDArray();
+
+            if (req.ContainsKey("Zipped"))
+            {
+                OSD osd = null;
+
+                byte[] inBytes = req["Zipped"].AsBinary();
+
+                try 
+                {
+                    osd = ZDecompressBytesToOsd(inBytes);
+
+                    if (osd != null)
+                    {
+                        if (osd is OSDArray) // assume array of MaterialIDs designating requested material entries
+                        {
+                            foreach (OSD elem in (OSDArray)osd)
+                            {
+
+                                try
+                                {
+                                    UUID id = new UUID(elem.AsBinary(), 0);
+                                    
+                                    if (m_knownMaterials.ContainsKey(id))
+                                    {
+                                        m_log.Info("[MaterialsDemoModule]: request for known material ID: " + id.ToString());
+                                        OSDMap matMap = new OSDMap();
+                                        matMap["ID"] = OSD.FromBinary(id.GetBytes());
+
+                                        matMap["Material"] = m_knownMaterials[id];
+                                        respArr.Add(matMap);
+                                    }
+                                    else
+                                        m_log.Info("[MaterialsDemoModule]: request for UNKNOWN material ID: " + id.ToString());
+                                }
+                                catch (Exception e)
+                                {
+                                    // report something here?
+                                    continue;
+                                }
+                            }
+                        }
+                        else if (osd is OSDMap) // reqest to assign a material
+                        {
+                            materialsFromViewer = osd as OSDMap;
+
+                            if (materialsFromViewer.ContainsKey("FullMaterialsPerFace"))
+                            {
+                                OSD matsOsd = materialsFromViewer["FullMaterialsPerFace"];
+                                if (matsOsd is OSDArray)
+                                {
+                                    OSDArray matsArr = matsOsd as OSDArray;
+
+                                    try
+                                    {
+                                        foreach (OSDMap matsMap in matsArr)
+                                        {
+                                            m_log.Debug("[MaterialsDemoModule]: processing matsMap: " + OSDParser.SerializeJsonString(matsMap));
+
+                                            uint matLocalID = 0;
+                                            try { matLocalID = matsMap["ID"].AsUInteger(); }
+                                            catch (Exception e) { m_log.Warn("[MaterialsDemoModule]: cannot decode \"ID\" from matsMap: " + e.Message); }
+                                            m_log.Debug("[MaterialsDemoModule]: matLocalId: " + matLocalID.ToString());
+
+
+                                            OSDMap mat = null;
+                                            try { mat = matsMap["Material"] as OSDMap; }
+                                            catch (Exception e) { m_log.Warn("[MaterialsDemoModule]: cannot decode \"Material\" from matsMap: " + e.Message); }
+                                            m_log.Debug("[MaterialsDemoModule]: mat: " + OSDParser.SerializeJsonString(mat));
+                                        
+                                            UUID id = HashOsd(mat);
+                                            m_knownMaterials[id] = mat;
+                                        
+
+                                            var sop = m_scene.GetSceneObjectPart(matLocalID);
+                                            if (sop == null)
+                                                m_log.Debug("[MaterialsDemoModule]: null SOP for localId: " + matLocalID.ToString());
+                                            else
+                                            {
+                                                //var te = sop.Shape.Textures;
+                                                var te = new Primitive.TextureEntry(sop.Shape.TextureEntry, 0, sop.Shape.TextureEntry.Length);
+
+                                                if (te == null)
+                                                {
+                                                    m_log.Debug("[MaterialsDemoModule]: null TextureEntry for localId: " + matLocalID.ToString());
+                                                }
+                                                else
+                                                {
+                                                    int face = -1;
+
+                                                    if (matsMap.ContainsKey("Face"))
+                                                    {
+                                                        face = matsMap["Face"].AsInteger();
+                                                        if (te.FaceTextures == null) // && face == 0)
+                                                        {
+                                                            if (te.DefaultTexture == null)
+                                                                m_log.Debug("[MaterialsDemoModule]: te.DefaultTexture is null");
+                                                            else
+                                                            {
+                                                                if (te.DefaultTexture.MaterialID == null)
+                                                                    m_log.Debug("[MaterialsDemoModule]: te.DefaultTexture.MaterialID is null");
+                                                                else
+                                                                {
+                                                                    te.DefaultTexture.MaterialID = id;
+                                                                }
+                                                            }
+                                                        }
+                                                        else
+                                                        {
+                                                            if (te.FaceTextures.Length >= face - 1)
+                                                            {
+                                                                if (te.FaceTextures[face] == null)
+                                                                    te.DefaultTexture.MaterialID = id;
+                                                                else
+                                                                    te.FaceTextures[face].MaterialID = id;
+                                                            }
+                                                        }
+                                                    }
+                                                    else
+                                                    {
+                                                        if (te.DefaultTexture != null)
+                                                            te.DefaultTexture.MaterialID = id;
+                                                    }
+
+                                                    m_log.Debug("[MaterialsDemoModule]: setting material ID for face " + face.ToString() + " to " + id.ToString());
+
+                                                    //we cant use sop.UpdateTextureEntry(te); because it filters so do it manually
+
+                                                    if (sop.ParentGroup != null)
+                                                    {
+                                                        sop.Shape.TextureEntry = te.GetBytes();
+                                                        sop.TriggerScriptChangedEvent(Changed.TEXTURE);
+                                                        sop.UpdateFlag = UpdateRequired.FULL;
+                                                        sop.ParentGroup.HasGroupChanged = true;
+
+                                                        sop.ScheduleFullUpdate();
+
+                                                        StoreMaterialsForPart(sop);
+                                                    }
+                                                }
+                                            }
+                                        }
+                                    }
+                                    catch (Exception e)
+                                    {
+                                        m_log.Warn("[MaterialsDemoModule]: exception processing received material: " + e.Message);
+                                    }
+                                }
+                            }
+                        }
+                    }
+
+                }
+                catch (Exception e)
+                {
+                    m_log.Warn("[MaterialsDemoModule]: exception decoding zipped CAP payload: " + e.Message);
+                    //return "";
+                }
+                m_log.Debug("[MaterialsDemoModule]: knownMaterials.Count: " + m_knownMaterials.Count.ToString());
+            }
+
+            
+            resp["Zipped"] = ZCompressOSD(respArr, false);
+            string response = OSDParser.SerializeLLSDXmlString(resp);
+
+            //m_log.Debug("[MaterialsDemoModule]: cap request: " + request);
+            m_log.Debug("[MaterialsDemoModule]: cap request (zipped portion): " + ZippedOsdBytesToString(req["Zipped"].AsBinary()));
+            m_log.Debug("[MaterialsDemoModule]: cap response: " + response);
+            return response;
+        }
+
+
+        public string RenderMaterialsGetCap(string request, string path,
+                string param, IOSHttpRequest httpRequest,
+                IOSHttpResponse httpResponse)
+        {
+            m_log.Debug("[MaterialsDemoModule]: GET cap handler");
+
+            OSDMap resp = new OSDMap();
+
+ 
+            int matsCount = 0;
+
+            OSDArray allOsd = new OSDArray();
+
+            foreach (KeyValuePair<UUID, OSDMap> kvp in m_knownMaterials)
+            {
+                OSDMap matMap = new OSDMap();
+
+                matMap["ID"] = OSD.FromBinary(kvp.Key.GetBytes());
+
+                matMap["Material"] = kvp.Value;
+                allOsd.Add(matMap);
+                matsCount++;
+            }
+
+
+            resp["Zipped"] = ZCompressOSD(allOsd, false);
+            m_log.Debug("[MaterialsDemoModule]: matsCount: " + matsCount.ToString());
+
+            return OSDParser.SerializeLLSDXmlString(resp);
+        }
+
+        static string ZippedOsdBytesToString(byte[] bytes)
+        {
+            try
+            {
+                return OSDParser.SerializeJsonString(ZDecompressBytesToOsd(bytes));
+            }
+            catch (Exception e)
+            {
+                return "ZippedOsdBytesToString caught an exception: " + e.ToString();
+            }
+        }
+
+        /// <summary>
+        /// computes a UUID by hashing a OSD object
+        /// </summary>
+        /// <param name="osd"></param>
+        /// <returns></returns>
+        private static UUID HashOsd(OSD osd)
+        {
+            using (var md5 = MD5.Create())
+                using (MemoryStream ms = new MemoryStream(OSDParser.SerializeLLSDBinary(osd, false)))
+                    return new UUID(md5.ComputeHash(ms), 0);
+        }
+
+        public static OSD ZCompressOSD(OSD inOsd, bool useHeader)
+        {
+            OSD osd = null;
+
+            using (MemoryStream msSinkCompressed = new MemoryStream())
+            {
+                using (Ionic.Zlib.ZlibStream zOut = new Ionic.Zlib.ZlibStream(msSinkCompressed, 
+                    Ionic.Zlib.CompressionMode.Compress, CompressionLevel.BestCompression, true))
+                {
+                    CopyStream(new MemoryStream(OSDParser.SerializeLLSDBinary(inOsd, useHeader)), zOut);
+                    zOut.Close();
+                }
+
+                msSinkCompressed.Seek(0L, SeekOrigin.Begin);
+                osd = OSD.FromBinary( msSinkCompressed.ToArray());
+            }
+
+            return osd;
+        }
+
+
+        public static OSD ZDecompressBytesToOsd(byte[] input)
+        {
+            OSD osd = null;
+
+            using (MemoryStream msSinkUnCompressed = new MemoryStream())
+            {
+                using (Ionic.Zlib.ZlibStream zOut = new Ionic.Zlib.ZlibStream(msSinkUnCompressed, CompressionMode.Decompress, true))
+                {
+                    CopyStream(new MemoryStream(input), zOut);
+                    zOut.Close();
+                }
+                msSinkUnCompressed.Seek(0L, SeekOrigin.Begin);
+                osd = OSDParser.DeserializeLLSDBinary(msSinkUnCompressed.ToArray());
+            }
+
+            return osd;
+        }
+
+        static void CopyStream(System.IO.Stream input, System.IO.Stream output)
+        {
+            byte[] buffer = new byte[2048];
+            int len;
+            while ((len = input.Read(buffer, 0, 2048)) > 0)
+            {
+                output.Write(buffer, 0, len);
+            }
+
+            output.Flush();
+        }
+
+    }
+}
\ No newline at end of file