From 33aaa40bee37ca4d8a3afa10fbbea7c1be3a1d58 Mon Sep 17 00:00:00 2001
From: Mic Bowman <cmickeyb@gmail.com>
Date: Wed, 8 May 2013 13:13:51 -0700
Subject: [PATCH] Adds an event and a method so that handling of the
 CachedTexture packet can be pulled out of LLClientView and
 moved to AvatarFactory. The first pass at reusing textures
 (turned off by default) is included. When reusing textures,
 if the baked textures from a previous login are still in
 the asset service (which generally means that they are in
 the simulator's cache) then the avatar will not need to
 rebake. This is both a performance improvement
 (specifically that an avatars baked textures do not need to
 be sent to other users who have the old textures cached)
 and a resource improvement (don't have to deal with
 duplicate bakes in the asset service cache).

---
 OpenSim/Framework/CachedTextureEventArg.cs         |   46 +++++++++++++++
 OpenSim/Framework/IClientAPI.cs                    |    5 ++
 .../Region/ClientStack/Linden/UDP/LLClientView.cs  |   58 ++++++++++++++-----
 .../Avatar/AvatarFactory/AvatarFactoryModule.cs    |   59 ++++++++++++++++++++
 .../Server/IRCClientView.cs                        |    6 ++
 .../Region/OptionalModules/World/NPC/NPCAvatar.cs  |    6 ++
 OpenSim/Tests/Common/Mock/TestClient.cs            |    6 ++
 bin/OpenSimDefaults.ini                            |    3 +
 8 files changed, 174 insertions(+), 15 deletions(-)
 create mode 100644 OpenSim/Framework/CachedTextureEventArg.cs

diff --git a/OpenSim/Framework/CachedTextureEventArg.cs b/OpenSim/Framework/CachedTextureEventArg.cs
new file mode 100644
index 0000000..239fc56
--- /dev/null
+++ b/OpenSim/Framework/CachedTextureEventArg.cs
@@ -0,0 +1,46 @@
+/*
+ * 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.Text;
+using OpenMetaverse;
+
+namespace OpenSim.Framework
+{
+    public class CachedTextureRequestArg
+    {
+        public int BakedTextureIndex;
+        public UUID WearableHashID;
+    }
+
+    public class CachedTextureResponseArg
+    {
+        public int BakedTextureIndex;
+        public UUID BakedTextureID;
+        public String HostName;
+    }
+}
diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index 4d5ec3a..cfb36fe 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -64,6 +64,8 @@ namespace OpenSim.Framework
 
     public delegate void NetworkStats(int inPackets, int outPackets, int unAckedBytes);
 
+    public delegate void CachedTextureRequest(IClientAPI remoteClient, int serial, List<CachedTextureRequestArg> cachedTextureRequest);
+
     public delegate void SetAppearance(IClientAPI remoteClient, Primitive.TextureEntry textureEntry, byte[] visualParams);
 
     public delegate void StartAnim(IClientAPI remoteClient, UUID animID);
@@ -780,6 +782,7 @@ namespace OpenSim.Framework
         event EstateChangeInfo OnEstateChangeInfo;
         event EstateManageTelehub OnEstateManageTelehub;
         // [Obsolete("LLClientView Specific.")]
+        event CachedTextureRequest OnCachedTextureRequest;
         event SetAppearance OnSetAppearance;
         // [Obsolete("LLClientView Specific - Replace and rename OnAvatarUpdate. Difference from SetAppearance?")]
         event AvatarNowWearing OnAvatarNowWearing;
@@ -1087,6 +1090,8 @@ namespace OpenSim.Framework
         /// <param name="textureEntry"></param>
         void SendAppearance(UUID agentID, byte[] visualParams, byte[] textureEntry);
 
+        void SendCachedTextureResponse(ISceneEntity avatar, int serial, List<CachedTextureResponseArg> cachedTextures);
+
         void SendStartPingCheck(byte seq);
 
         /// <summary>
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index bede379..47dd842 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -84,6 +84,7 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         public event ModifyTerrain OnModifyTerrain;
         public event Action<IClientAPI> OnRegionHandShakeReply;
         public event GenericCall1 OnRequestWearables;
+        public event CachedTextureRequest OnCachedTextureRequest;
         public event SetAppearance OnSetAppearance;
         public event AvatarNowWearing OnAvatarNowWearing;
         public event RezSingleAttachmentFromInv OnRezSingleAttachmentFromInv;
@@ -321,7 +322,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         private readonly byte[] m_channelVersion = Utils.EmptyBytes;
         private readonly IGroupsModule m_GroupsModule;
 
-        private int m_cachedTextureSerial;
         private PriorityQueue m_entityUpdates;
         private PriorityQueue m_entityProps;
         private Prioritizer m_prioritizer;
@@ -11462,8 +11462,6 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         }
 
         /// <summary>
-        /// Send a response back to a client when it asks the asset server (via the region server) if it has
-        /// its appearance texture cached.
         /// </summary>
         /// <remarks>
         /// At the moment, we always reply that there is no cached texture.
@@ -11473,33 +11471,63 @@ namespace OpenSim.Region.ClientStack.LindenUDP
         /// <returns></returns>
         protected bool HandleAgentTextureCached(IClientAPI simclient, Packet packet)
         {
-            //m_log.Debug("texture cached: " + packet.ToString());
             AgentCachedTexturePacket cachedtex = (AgentCachedTexturePacket)packet;
-            AgentCachedTextureResponsePacket cachedresp = (AgentCachedTextureResponsePacket)PacketPool.Instance.GetPacket(PacketType.AgentCachedTextureResponse);
 
             if (cachedtex.AgentData.SessionID != SessionId)
                 return false;
 
+            List<CachedTextureRequestArg> requestArgs = new List<CachedTextureRequestArg>();
+
+            for (int i = 0; i < cachedtex.WearableData.Length; i++)
+            {
+                CachedTextureRequestArg arg = new CachedTextureRequestArg();
+                arg.BakedTextureIndex = cachedtex.WearableData[i].TextureIndex;
+                arg.WearableHashID = cachedtex.WearableData[i].ID;
+                
+                requestArgs.Add(arg);
+            }
+
+            CachedTextureRequest handlerCachedTextureRequest = OnCachedTextureRequest;
+            if (handlerCachedTextureRequest != null)
+            {
+                handlerCachedTextureRequest(simclient,cachedtex.AgentData.SerialNum,requestArgs);
+            }
+
+            return true;
+        }
+        
+        /// <summary>
+        /// Send a response back to a client when it asks the asset server (via the region server) if it has
+        /// its appearance texture cached.
+        /// </summary>
+        /// <param name="avatar"></param>
+        /// <param name="serial"></param>
+        /// <param name="cachedTextures"></param>
+        /// <returns></returns>
+        public void SendCachedTextureResponse(ISceneEntity avatar, int serial, List<CachedTextureResponseArg> cachedTextures)
+        {
+            ScenePresence presence = avatar as ScenePresence;
+            if (presence == null)
+                return;
+
+            AgentCachedTextureResponsePacket cachedresp = (AgentCachedTextureResponsePacket)PacketPool.Instance.GetPacket(PacketType.AgentCachedTextureResponse);
+
             // TODO: don't create new blocks if recycling an old packet
-            cachedresp.AgentData.AgentID = AgentId;
+            cachedresp.AgentData.AgentID = m_agentId;
             cachedresp.AgentData.SessionID = m_sessionId;
-            cachedresp.AgentData.SerialNum = m_cachedTextureSerial;
-            m_cachedTextureSerial++;
-            cachedresp.WearableData =
-                new AgentCachedTextureResponsePacket.WearableDataBlock[cachedtex.WearableData.Length];
+            cachedresp.AgentData.SerialNum = serial;
+            cachedresp.WearableData = new AgentCachedTextureResponsePacket.WearableDataBlock[cachedTextures.Count];
 
-            for (int i = 0; i < cachedtex.WearableData.Length; i++)
+            for (int i = 0; i < cachedTextures.Count; i++)
             {
                 cachedresp.WearableData[i] = new AgentCachedTextureResponsePacket.WearableDataBlock();
-                cachedresp.WearableData[i].TextureIndex = cachedtex.WearableData[i].TextureIndex;
-                cachedresp.WearableData[i].TextureID = UUID.Zero;
+                cachedresp.WearableData[i].TextureIndex = (byte)cachedTextures[i].BakedTextureIndex;
+                cachedresp.WearableData[i].TextureID = cachedTextures[i].BakedTextureID;
                 cachedresp.WearableData[i].HostName = new byte[0];
             }
 
             cachedresp.Header.Zerocoded = true;
             OutPacket(cachedresp, ThrottleOutPacketType.Task);
-
-            return true;
         }
 
         protected bool HandleMultipleObjUpdate(IClientAPI simClient, Packet packet)
diff --git a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
index c7ac7c4..b640b48 100644
--- a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
@@ -55,6 +55,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
         private int m_savetime = 5; // seconds to wait before saving changed appearance
         private int m_sendtime = 2; // seconds to wait before sending changed appearance
+        private bool m_reusetextures = false;
 
         private int m_checkTime = 500; // milliseconds to wait between checks for appearance updates
         private System.Timers.Timer m_updateTimer = new System.Timers.Timer();
@@ -73,6 +74,8 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
             {
                 m_savetime = Convert.ToInt32(appearanceConfig.GetString("DelayBeforeAppearanceSave",Convert.ToString(m_savetime)));
                 m_sendtime = Convert.ToInt32(appearanceConfig.GetString("DelayBeforeAppearanceSend",Convert.ToString(m_sendtime)));
+                m_reusetextures = appearanceConfig.GetBoolean("ReuseTextures",m_reusetextures);
+                
                 // m_log.InfoFormat("[AVFACTORY] configured for {0} save and {1} send",m_savetime,m_sendtime);
             }
 
@@ -131,6 +134,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
             client.OnRequestWearables += Client_OnRequestWearables;
             client.OnSetAppearance += Client_OnSetAppearance;
             client.OnAvatarNowWearing += Client_OnAvatarNowWearing;
+            client.OnCachedTextureRequest += Client_OnCachedTextureRequest;
         }
 
         #endregion
@@ -671,6 +675,61 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 QueueAppearanceSave(client.AgentId);
             }
         }
+
+        /// <summary>
+        /// Respond to the cached textures request from the client
+        /// </summary>
+        /// <param name="client"></param>
+        /// <param name="serial"></param>
+        /// <param name="cachedTextureRequest"></param>
+        private void Client_OnCachedTextureRequest(IClientAPI client, int serial, List<CachedTextureRequestArg> cachedTextureRequest)
+        {
+            // m_log.WarnFormat("[AVFACTORY]: Client_OnCachedTextureRequest called for {0} ({1})", client.Name, client.AgentId);
+            ScenePresence sp = m_scene.GetScenePresence(client.AgentId);
+
+            List<CachedTextureResponseArg> cachedTextureResponse = new List<CachedTextureResponseArg>();
+            foreach (CachedTextureRequestArg request in cachedTextureRequest)
+            {
+                UUID texture = UUID.Zero;
+                int index = request.BakedTextureIndex;
+                
+                if (m_reusetextures)
+                {
+                    // this is the most insanely dumb way to do this... however it seems to
+                    // actually work. if the appearance has been reset because wearables have
+                    // changed then the texture entries are zero'd out until the bakes are 
+                    // uploaded. on login, if the textures exist in the cache (eg if you logged
+                    // into the simulator recently, then the appearance will pull those and send
+                    // them back in the packet and you won't have to rebake. if the textures aren't
+                    // in the cache then the intial makeroot() call in scenepresence will zero
+                    // them out.
+                    //
+                    // a better solution (though how much better is an open question) is to
+                    // store the hashes in the appearance and compare them. Thats's coming.
+
+                    Primitive.TextureEntryFace face = sp.Appearance.Texture.FaceTextures[index];
+                    if (face != null)
+                        texture = face.TextureID;
+
+                    // m_log.WarnFormat("[AVFACTORY]: reuse texture {0} for index {1}",texture,index);
+                }
+                
+                CachedTextureResponseArg response = new CachedTextureResponseArg();
+                response.BakedTextureIndex = index;
+                response.BakedTextureID = texture;
+                response.HostName = null;
+
+                cachedTextureResponse.Add(response);
+            }
+            
+            // m_log.WarnFormat("[AVFACTORY]: serial is {0}",serial);
+            // The serial number appears to be used to match requests and responses
+            // in the texture transaction. We just send back the serial number
+            // that was provided in the request. The viewer bumps this for us.
+            client.SendCachedTextureResponse(sp, serial, cachedTextureResponse);
+        }
+
+
         #endregion
 
         public void WriteBakedTexturesReport(IScenePresence sp, ReportOutputAction outputAction)
diff --git a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
index 915ebd8..3644856 100644
--- a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
+++ b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
@@ -660,6 +660,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
         public event BakeTerrain OnBakeTerrain;
         public event EstateChangeInfo OnEstateChangeInfo;
         public event EstateManageTelehub OnEstateManageTelehub;
+        public event CachedTextureRequest OnCachedTextureRequest;
         public event SetAppearance OnSetAppearance;
         public event AvatarNowWearing OnAvatarNowWearing;
         public event RezSingleAttachmentFromInv OnRezSingleAttachmentFromInv;
@@ -938,7 +939,12 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
         {
             
         }
+        
+        public void SendCachedTextureResponse(ISceneEntity avatar, int serial, List<CachedTextureResponseArg> cachedTextures)
+        {
 
+        }
+        
         public void SendStartPingCheck(byte seq)
         {
             
diff --git a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
index 0ee00e9..8aae300 100644
--- a/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
+++ b/OpenSim/Region/OptionalModules/World/NPC/NPCAvatar.cs
@@ -391,6 +391,7 @@ namespace OpenSim.Region.OptionalModules.World.NPC
         public event EstateTeleportAllUsersHomeRequest OnEstateTeleportAllUsersHomeRequest;
         public event EstateChangeInfo OnEstateChangeInfo;
         public event EstateManageTelehub OnEstateManageTelehub;
+        public event CachedTextureRequest OnCachedTextureRequest;
         public event ScriptReset OnScriptReset;
         public event GetScriptRunning OnGetScriptRunning;
         public event SetScriptRunning OnSetScriptRunning;
@@ -569,6 +570,11 @@ namespace OpenSim.Region.OptionalModules.World.NPC
         {
         }
 
+        public void SendCachedTextureResponse(ISceneEntity avatar, int serial, List<CachedTextureResponseArg> cachedTextures)
+        {
+
+        }
+
         public virtual void Kick(string message)
         {
         }
diff --git a/OpenSim/Tests/Common/Mock/TestClient.cs b/OpenSim/Tests/Common/Mock/TestClient.cs
index 41402a4..664ecb6 100644
--- a/OpenSim/Tests/Common/Mock/TestClient.cs
+++ b/OpenSim/Tests/Common/Mock/TestClient.cs
@@ -196,6 +196,7 @@ namespace OpenSim.Tests.Common.Mock
         public event EstateCovenantRequest OnEstateCovenantRequest;
         public event EstateChangeInfo OnEstateChangeInfo;
         public event EstateManageTelehub OnEstateManageTelehub;
+        public event CachedTextureRequest OnCachedTextureRequest;
 
         public event ObjectDuplicateOnRay OnObjectDuplicateOnRay;
 
@@ -509,6 +510,11 @@ namespace OpenSim.Tests.Common.Mock
         {
         }
 
+        public void SendCachedTextureResponse(ISceneEntity avatar, int serial, List<CachedTextureResponseArg> cachedTextures)
+        {
+
+        }
+
         public virtual void Kick(string message)
         {
         }
diff --git a/bin/OpenSimDefaults.ini b/bin/OpenSimDefaults.ini
index 0e35c63..81843b1 100644
--- a/bin/OpenSimDefaults.ini
+++ b/bin/OpenSimDefaults.ini
@@ -683,6 +683,9 @@
     ; in other situations (e.g. appearance baking failures where the avatar only appears as a cloud to others).
     ResendAppearanceUpdates = true
 
+    ; Turning this on responds to CachedTexture packets to possibly avoid rebaking the avatar 
+    ; on every login
+    ReuseTextures = false
 
 [Attachments]
     ; Controls whether avatar attachments are enabled.
-- 
1.7.9.5

From 11058a022d574413dd9154061023fdebd03a5306 Mon Sep 17 00:00:00 2001
From: Mic Bowman <cmickeyb@gmail.com>
Date: Wed, 15 May 2013 16:45:27 -0700
Subject: [PATCH] Adds support for comparing texture hashes for the purpose of
 accurately responding to AgentTextureCached packets. There
 is a change to IClientAPI to report the wearbles hashes
 that come in through the SetAppearance packet. Added
 storage of the texture hashes in the appearance. While
 these are added to the Pack/Unpack (with support for
 missing values) routines (which means Simian will store
 them properly), they are not currently persisted in Robust.

---
 OpenSim/Framework/AvatarAppearance.cs              |   98 +++++++++++++------
 OpenSim/Framework/IClientAPI.cs                    |    2 +-
 .../Region/ClientStack/Linden/UDP/LLClientView.cs  |   27 +++++-
 .../Avatar/AvatarFactory/AvatarFactoryModule.cs    |  102 +++++++++++---------
 .../Server/IRCClientView.cs                        |    2 +-
 5 files changed, 147 insertions(+), 84 deletions(-)

diff --git a/OpenSim/Framework/AvatarAppearance.cs b/OpenSim/Framework/AvatarAppearance.cs
index 494ae5e..157feb5 100644
--- a/OpenSim/Framework/AvatarAppearance.cs
+++ b/OpenSim/Framework/AvatarAppearance.cs
@@ -53,6 +53,7 @@ namespace OpenSim.Framework
         protected AvatarWearable[] m_wearables;
         protected Dictionary<int, List<AvatarAttachment>> m_attachments;
         protected float m_avatarHeight = 0;
+        protected UUID[] m_texturehashes;
 
         public virtual int Serial
         {
@@ -98,6 +99,8 @@ namespace OpenSim.Framework
             SetDefaultParams();
             SetHeight();
             m_attachments = new Dictionary<int, List<AvatarAttachment>>();
+
+            ResetTextureHashes();
         }
 
         public AvatarAppearance(OSDMap map)
@@ -108,32 +111,6 @@ namespace OpenSim.Framework
             SetHeight();
         }
 
-        public AvatarAppearance(AvatarWearable[] wearables, Primitive.TextureEntry textureEntry, byte[] visualParams)
-        {
-//            m_log.WarnFormat("[AVATAR APPEARANCE] create initialized appearance");
-
-            m_serial = 0;
-
-            if (wearables != null)
-                m_wearables = wearables;
-            else
-                SetDefaultWearables();
-
-            if (textureEntry != null)
-                m_texture = textureEntry;
-            else
-                SetDefaultTexture();
-
-            if (visualParams != null)
-                m_visualparams = visualParams;
-            else
-                SetDefaultParams();
-
-            SetHeight();
-
-            m_attachments = new Dictionary<int, List<AvatarAttachment>>();
-        }
-
         public AvatarAppearance(AvatarAppearance appearance) : this(appearance, true)
         {
         }
@@ -151,6 +128,8 @@ namespace OpenSim.Framework
                 SetHeight();
                 m_attachments = new Dictionary<int, List<AvatarAttachment>>();
 
+                ResetTextureHashes();
+                
                 return;
             }
 
@@ -166,6 +145,10 @@ namespace OpenSim.Framework
                     SetWearable(i,appearance.Wearables[i]);
             }
 
+            m_texturehashes = new UUID[AvatarAppearance.TEXTURE_COUNT];
+            for (int i = 0; i < AvatarAppearance.TEXTURE_COUNT; i++)
+                m_texturehashes[i] = new UUID(appearance.m_texturehashes[i]);
+
             m_texture = null;
             if (appearance.Texture != null)
             {
@@ -200,6 +183,37 @@ namespace OpenSim.Framework
             }
         }
 
+        public void ResetTextureHashes()
+        {
+            m_texturehashes = new UUID[AvatarAppearance.TEXTURE_COUNT];
+            for (uint i = 0; i < AvatarAppearance.TEXTURE_COUNT; i++)
+                m_texturehashes[i] = UUID.Zero;
+        }
+                
+        public UUID GetTextureHash(int textureIndex)
+        {
+            return m_texturehashes[NormalizeBakedTextureIndex(textureIndex)];
+        }
+        
+        public void SetTextureHash(int textureIndex, UUID textureHash)
+        {
+            m_texturehashes[NormalizeBakedTextureIndex(textureIndex)] = new UUID(textureHash);
+        }
+        
+        /// <summary>
+        /// Normalizes the texture index to the actual bake index, this is done to
+        /// accommodate older viewers that send the BAKE_INDICES index rather than
+        /// the actual texture index
+        /// </summary>
+        private int NormalizeBakedTextureIndex(int textureIndex)
+        {
+            // Earlier viewer send the index into the baked index array, just trying to be careful here
+            if (textureIndex < BAKE_INDICES.Length)
+                return BAKE_INDICES[textureIndex];
+            
+            return textureIndex;
+        }
+        
         public void ClearWearables()
         {
             m_wearables = new AvatarWearable[AvatarWearable.MAX_WEARABLES];
@@ -223,12 +237,7 @@ namespace OpenSim.Framework
             m_serial = 0;
 
             SetDefaultTexture();
-            
-            //for (int i = 0; i < BAKE_INDICES.Length; i++)
-            // {
-            //     int idx = BAKE_INDICES[i];
-            //     m_texture.FaceTextures[idx].TextureID = UUID.Zero;
-            // }
+            ResetTextureHashes();
         }
         
         protected virtual void SetDefaultParams()
@@ -598,6 +607,12 @@ namespace OpenSim.Framework
             data["serial"] = OSD.FromInteger(m_serial);
             data["height"] = OSD.FromReal(m_avatarHeight);
 
+            // Hashes
+            OSDArray hashes = new OSDArray(AvatarAppearance.TEXTURE_COUNT);
+            for (uint i = 0; i < AvatarAppearance.TEXTURE_COUNT; i++)
+                hashes.Add(OSD.FromUUID(m_texturehashes[i]));
+            data["hashes"] = hashes;
+
             // Wearables
             OSDArray wears = new OSDArray(AvatarWearable.MAX_WEARABLES);
             for (int i = 0; i < AvatarWearable.MAX_WEARABLES; i++)
@@ -642,6 +657,25 @@ namespace OpenSim.Framework
 
             try
             {
+                // Hashes
+                m_texturehashes = new UUID[AvatarAppearance.TEXTURE_COUNT];
+                if ((data != null) && (data["hashes"] != null) && (data["hashes"]).Type == OSDType.Array)
+                {
+                    OSDArray hashes = (OSDArray)(data["hashes"]);
+                    for (int i = 0; i < AvatarAppearance.TEXTURE_COUNT; i++)
+                    {
+                        UUID hashID = UUID.Zero;
+                        if (i < hashes.Count && hashes[i] != null)
+                            hashID = hashes[i].AsUUID();
+                        m_texturehashes[i] = hashID;
+                    }
+                }
+                else
+                {
+                    for (uint i = 0; i < AvatarAppearance.TEXTURE_COUNT; i++)
+                        m_texturehashes[i] = UUID.Zero;
+                }
+                
                 // Wearables
                 SetDefaultWearables();
                 if ((data != null) && (data["wearables"] != null) && (data["wearables"]).Type == OSDType.Array)
diff --git a/OpenSim/Framework/IClientAPI.cs b/OpenSim/Framework/IClientAPI.cs
index 59ce2c4..1fffeff 100644
--- a/OpenSim/Framework/IClientAPI.cs
+++ b/OpenSim/Framework/IClientAPI.cs
@@ -66,7 +66,7 @@ namespace OpenSim.Framework
 
     public delegate void CachedTextureRequest(IClientAPI remoteClient, int serial, List<CachedTextureRequestArg> cachedTextureRequest);
 
-    public delegate void SetAppearance(IClientAPI remoteClient, Primitive.TextureEntry textureEntry, byte[] visualParams);
+    public delegate void SetAppearance(IClientAPI remoteClient, Primitive.TextureEntry textureEntry, byte[] visualParams, List<CachedTextureRequestArg> cachedTextureData);
 
     public delegate void StartAnim(IClientAPI remoteClient, UUID animID);
 
diff --git a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
index e014471..dd8ef9c 100644
--- a/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
+++ b/OpenSim/Region/ClientStack/Linden/UDP/LLClientView.cs
@@ -6214,7 +6214,16 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                     if (appear.ObjectData.TextureEntry.Length > 1)
                         te = new Primitive.TextureEntry(appear.ObjectData.TextureEntry, 0, appear.ObjectData.TextureEntry.Length);
 
-                    handlerSetAppearance(sender, te, visualparams);
+                    List<CachedTextureRequestArg> hashes = new List<CachedTextureRequestArg>();
+                    for (int i = 0; i < appear.WearableData.Length; i++)
+                    {
+                        CachedTextureRequestArg arg = new CachedTextureRequestArg();
+                        arg.BakedTextureIndex = appear.WearableData[i].TextureIndex;
+                        arg.WearableHashID = appear.WearableData[i].CacheID;
+                        hashes.Add(arg);
+                    }
+
+                    handlerSetAppearance(sender, te, visualparams, hashes);
                 }
                 catch (Exception e)
                 {
@@ -11487,12 +11496,20 @@ namespace OpenSim.Region.ClientStack.LindenUDP
                 requestArgs.Add(arg);
             }
 
-            CachedTextureRequest handlerCachedTextureRequest = OnCachedTextureRequest;
-            if (handlerCachedTextureRequest != null)
+            try
+            {
+                CachedTextureRequest handlerCachedTextureRequest = OnCachedTextureRequest;
+                if (handlerCachedTextureRequest != null)
+                {
+                    handlerCachedTextureRequest(simclient,cachedtex.AgentData.SerialNum,requestArgs);
+                }
+            }
+            catch (Exception e)
             {
-                handlerCachedTextureRequest(simclient,cachedtex.AgentData.SerialNum,requestArgs);
+                m_log.ErrorFormat("[CLIENT VIEW]: AgentTextureCached packet handler threw an exception, {0}", e);
+                return false;
             }
-
+            
             return true;
         }
         
diff --git a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
index b640b48..482bf6f 100644
--- a/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
+++ b/OpenSim/Region/CoreModules/Avatar/AvatarFactory/AvatarFactoryModule.cs
@@ -147,7 +147,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// <param name="visualParam"></param>
         public void SetAppearance(IScenePresence sp, AvatarAppearance appearance)
         {
-            SetAppearance(sp, appearance.Texture, appearance.VisualParams);
+            DoSetAppearance(sp, appearance.Texture, appearance.VisualParams, new List<CachedTextureRequestArg>());
         }
 
         /// <summary>
@@ -158,9 +158,20 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// <param name="visualParam"></param>
         public void SetAppearance(IScenePresence sp, Primitive.TextureEntry textureEntry, byte[] visualParams)
         {
-//            m_log.DebugFormat(
-//                "[AVFACTORY]: start SetAppearance for {0}, te {1}, visualParams {2}",
-//                sp.Name, textureEntry, visualParams);
+            DoSetAppearance(sp, textureEntry, visualParams, new List<CachedTextureRequestArg>());
+        }
+        
+        /// <summary>
+        /// Set appearance data (texture asset IDs and slider settings) 
+        /// </summary>
+        /// <param name="sp"></param>
+        /// <param name="texture"></param>
+        /// <param name="visualParam"></param>
+        protected void DoSetAppearance(IScenePresence sp, Primitive.TextureEntry textureEntry, byte[] visualParams, List<CachedTextureRequestArg> hashes)
+        {
+            // m_log.DebugFormat(
+            //     "[AVFACTORY]: start SetAppearance for {0}, te {1}, visualParams {2}",
+            //     sp.Name, textureEntry, visualParams);
 
             // TODO: This is probably not necessary any longer, just assume the
             // textureEntry set implies that the appearance transaction is complete
@@ -190,18 +201,22 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 // Process the baked texture array
                 if (textureEntry != null)
                 {
-//                    m_log.DebugFormat("[AVFACTORY]: Received texture update for {0} {1}", sp.Name, sp.UUID);
-
-//                    WriteBakedTexturesReport(sp, m_log.DebugFormat);
+                    // m_log.DebugFormat("[AVFACTORY]: Received texture update for {0} {1}", sp.Name, sp.UUID); 
+                    // WriteBakedTexturesReport(sp, m_log.DebugFormat);
 
                     changed = sp.Appearance.SetTextureEntries(textureEntry) || changed;
 
-//                    WriteBakedTexturesReport(sp, m_log.DebugFormat);
+                    // WriteBakedTexturesReport(sp, m_log.DebugFormat);
 
                     // If bake textures are missing and this is not an NPC, request a rebake from client
                     if (!ValidateBakedTextureCache(sp) && (((ScenePresence)sp).PresenceType != PresenceType.Npc))
                         RequestRebake(sp, true);
 
+                    // Save the wearble hashes in the appearance
+                    sp.Appearance.ResetTextureHashes();
+                    foreach (CachedTextureRequestArg arg in hashes)
+                        sp.Appearance.SetTextureHash(arg.BakedTextureIndex,arg.WearableHashID);
+                        
                     // This appears to be set only in the final stage of the appearance
                     // update transaction. In theory, we should be able to do an immediate
                     // appearance send and save here.
@@ -235,13 +250,13 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
         public bool SendAppearance(UUID agentId)
         {
-//            m_log.DebugFormat("[AVFACTORY]: Sending appearance for {0}", agentId);
+            // m_log.DebugFormat("[AVFACTORY]: Sending appearance for {0}", agentId);
 
             ScenePresence sp = m_scene.GetScenePresence(agentId);
             if (sp == null)
             {
                 // This is expected if the user has gone away.
-//                m_log.DebugFormat("[AVFACTORY]: Agent {0} no longer in the scene", agentId);
+                // m_log.DebugFormat("[AVFACTORY]: Agent {0} no longer in the scene", agentId);
                 return false;
             }
 
@@ -318,7 +333,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// <param name="agentId"></param>
         public void QueueAppearanceSend(UUID agentid)
         {
-//            m_log.DebugFormat("[AVFACTORY]: Queue appearance send for {0}", agentid);
+            // m_log.DebugFormat("[AVFACTORY]: Queue appearance send for {0}", agentid);
 
             // 10000 ticks per millisecond, 1000 milliseconds per second
             long timestamp = DateTime.Now.Ticks + Convert.ToInt64(m_sendtime * 1000 * 10000);
@@ -331,7 +346,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
 
         public void QueueAppearanceSave(UUID agentid)
         {
-//            m_log.DebugFormat("[AVFACTORY]: Queueing appearance save for {0}", agentid);
+            // m_log.DebugFormat("[AVFACTORY]: Queueing appearance save for {0}", agentid);
 
             // 10000 ticks per millisecond, 1000 milliseconds per second
             long timestamp = DateTime.Now.Ticks + Convert.ToInt64(m_savetime * 1000 * 10000);
@@ -356,9 +371,9 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 if (face == null)
                     continue;
 
-//                m_log.DebugFormat(
-//                    "[AVFACTORY]: Looking for texture {0}, id {1} for {2} {3}",
-//                    face.TextureID, idx, client.Name, client.AgentId);
+                // m_log.DebugFormat(
+                //     "[AVFACTORY]: Looking for texture {0}, id {1} for {2} {3}",
+                //     face.TextureID, idx, client.Name, client.AgentId);
 
                 // if the texture is one of the "defaults" then skip it
                 // this should probably be more intelligent (skirt texture doesnt matter
@@ -373,7 +388,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                     return false;
             }
 
-//            m_log.DebugFormat("[AVFACTORY]: Completed texture check for {0} {1}", sp.Name, sp.UUID);
+            // m_log.DebugFormat("[AVFACTORY]: Completed texture check for {0} {1}", sp.Name, sp.UUID);
 
             // If we only found default textures, then the appearance is not cached
             return (defonly ? false : true);
@@ -392,9 +407,9 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 if (face == null)
                     continue;
 
-//                m_log.DebugFormat(
-//                    "[AVFACTORY]: Looking for texture {0}, id {1} for {2} {3}",
-//                    face.TextureID, idx, client.Name, client.AgentId);
+                // m_log.DebugFormat(
+                //     "[AVFACTORY]: Looking for texture {0}, id {1} for {2} {3}",
+                //     face.TextureID, idx, client.Name, client.AgentId);
 
                 // if the texture is one of the "defaults" then skip it
                 // this should probably be more intelligent (skirt texture doesnt matter
@@ -458,9 +473,9 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 if (bakeType == BakeType.Unknown)
                     continue;
 
-//                m_log.DebugFormat(
-//                    "[AVFACTORY]: NPC avatar {0} has texture id {1} : {2}",
-//                    acd.AgentID, i, acd.Appearance.Texture.FaceTextures[i]);
+                // m_log.DebugFormat(
+                //     "[AVFACTORY]: NPC avatar {0} has texture id {1} : {2}",
+                //     acd.AgentID, i, acd.Appearance.Texture.FaceTextures[i]);
 
                 int ftIndex = (int)AppearanceManager.BakeTypeToAgentTextureIndex(bakeType);
                 Primitive.TextureEntryFace texture = faceTextures[ftIndex];    // this will be null if there's no such baked texture
@@ -484,7 +499,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                     UUID avatarID = kvp.Key;
                     long sendTime = kvp.Value;
 
-//                    m_log.DebugFormat("[AVFACTORY]: Handling queued appearance updates for {0}, update delta to now is {1}", avatarID, sendTime - now);
+                    // m_log.DebugFormat("[AVFACTORY]: Handling queued appearance updates for {0}, update delta to now is {1}", avatarID, sendTime - now);
 
                     if (sendTime < now)
                     {
@@ -530,11 +545,11 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
             if (sp == null)
             {
                 // This is expected if the user has gone away.
-//                m_log.DebugFormat("[AVFACTORY]: Agent {0} no longer in the scene", agentid);
+                // m_log.DebugFormat("[AVFACTORY]: Agent {0} no longer in the scene", agentid);
                 return;
             }
 
-//            m_log.DebugFormat("[AVFACTORY]: Saving appearance for avatar {0}", agentid);
+            // m_log.DebugFormat("[AVFACTORY]: Saving appearance for avatar {0}", agentid);
 
             // This could take awhile since it needs to pull inventory
             // We need to do it at the point of save so that there is a sufficient delay for any upload of new body part/shape
@@ -622,12 +637,12 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// <param name="client"></param>
         /// <param name="texture"></param>
         /// <param name="visualParam"></param>
-        private void Client_OnSetAppearance(IClientAPI client, Primitive.TextureEntry textureEntry, byte[] visualParams)
+        private void Client_OnSetAppearance(IClientAPI client, Primitive.TextureEntry textureEntry, byte[] visualParams, List<CachedTextureRequestArg> hashes)
         {
             // m_log.WarnFormat("[AVFACTORY]: Client_OnSetAppearance called for {0} ({1})", client.Name, client.AgentId);
             ScenePresence sp = m_scene.GetScenePresence(client.AgentId);
             if (sp != null)
-                SetAppearance(sp, textureEntry, visualParams);
+                DoSetAppearance(sp, textureEntry, visualParams, hashes);
             else
                 m_log.WarnFormat("[AVFACTORY]: Client_OnSetAppearance unable to find presence for {0}", client.AgentId);
         }
@@ -684,7 +699,7 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
         /// <param name="cachedTextureRequest"></param>
         private void Client_OnCachedTextureRequest(IClientAPI client, int serial, List<CachedTextureRequestArg> cachedTextureRequest)
         {
-            // m_log.WarnFormat("[AVFACTORY]: Client_OnCachedTextureRequest called for {0} ({1})", client.Name, client.AgentId);
+            // m_log.DebugFormat("[AVFACTORY]: Client_OnCachedTextureRequest called for {0} ({1})", client.Name, client.AgentId);
             ScenePresence sp = m_scene.GetScenePresence(client.AgentId);
 
             List<CachedTextureResponseArg> cachedTextureResponse = new List<CachedTextureResponseArg>();
@@ -695,23 +710,20 @@ namespace OpenSim.Region.CoreModules.Avatar.AvatarFactory
                 
                 if (m_reusetextures)
                 {
-                    // this is the most insanely dumb way to do this... however it seems to
-                    // actually work. if the appearance has been reset because wearables have
-                    // changed then the texture entries are zero'd out until the bakes are 
-                    // uploaded. on login, if the textures exist in the cache (eg if you logged
-                    // into the simulator recently, then the appearance will pull those and send
-                    // them back in the packet and you won't have to rebake. if the textures aren't
-                    // in the cache then the intial makeroot() call in scenepresence will zero
-                    // them out.
-                    //
-                    // a better solution (though how much better is an open question) is to
-                    // store the hashes in the appearance and compare them. Thats's coming.
-
-                    Primitive.TextureEntryFace face = sp.Appearance.Texture.FaceTextures[index];
-                    if (face != null)
-                        texture = face.TextureID;
-
-                    // m_log.WarnFormat("[AVFACTORY]: reuse texture {0} for index {1}",texture,index);
+                    if (sp.Appearance.GetTextureHash(index) == request.WearableHashID)
+                    {
+                        Primitive.TextureEntryFace face = sp.Appearance.Texture.FaceTextures[index];
+                        if (face != null)
+                            texture = face.TextureID;
+                    }
+                    else
+                    {
+                        // We know that that hash is wrong, null it out
+                        // and wait for the setappearance call
+                        sp.Appearance.SetTextureHash(index,UUID.Zero);
+                    }
+
+                    // m_log.WarnFormat("[AVFACTORY]: use texture {0} for index {1}; hash={2}",texture,index,request.WearableHashID);
                 }
                 
                 CachedTextureResponseArg response = new CachedTextureResponseArg();
diff --git a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
index 384eb1f..118635d 100644
--- a/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
+++ b/OpenSim/Region/OptionalModules/Agent/InternetRelayClientView/Server/IRCClientView.cs
@@ -907,7 +907,7 @@ namespace OpenSim.Region.OptionalModules.Agent.InternetRelayClientView.Server
             // Mimicking LLClientView which gets always set appearance from client.
             AvatarAppearance appearance;
             m_scene.GetAvatarAppearance(this, out appearance);
-            OnSetAppearance(this, appearance.Texture, (byte[])appearance.VisualParams.Clone());
+            OnSetAppearance(this, appearance.Texture, (byte[])appearance.VisualParams.Clone(), new List<CachedTextureRequestArg>());
         }
 
         public void SendRegionHandshake(RegionInfo regionInfo, RegionHandshakeArgs args)
-- 
1.7.9.5