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diff --git a/indra/llappearance/llwearabledata.cpp b/indra/llappearance/llwearabledata.cpp
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+++ b/indra/llappearance/llwearabledata.cpp
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+/** 
+ * @file llwearabledata.cpp
+ * @brief LLWearableData class implementation
+ *
+ * $LicenseInfo:firstyear=2012&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llwearabledata.h"
+
+#include "llavatarappearance.h"
+#include "llavatarappearancedefines.h"
+#include "lldriverparam.h"
+#include "llmd5.h"
+
+LLWearableData::LLWearableData() :
+	mAvatarAppearance(NULL)
+{
+}
+
+// virtual
+LLWearableData::~LLWearableData()
+{
+}
+
+using namespace LLAvatarAppearanceDefines;
+
+LLWearable* LLWearableData::getWearable(const LLWearableType::EType type, U32 index)
+{
+	wearableentry_map_t::iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		return NULL;
+	}
+	wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	if (index>=wearable_vec.size())
+	{
+		return NULL;
+	}
+	else
+	{
+		return wearable_vec[index];
+	}
+}
+
+void LLWearableData::setWearable(const LLWearableType::EType type, U32 index, LLWearable *wearable)
+{
+	LLWearable *old_wearable = getWearable(type,index);
+	if (!old_wearable)
+	{
+		pushWearable(type,wearable);
+		return;
+	}
+	
+	wearableentry_map_t::iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		llwarns << "invalid type, type " << type << " index " << index << llendl; 
+		return;
+	}
+	wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	if (index>=wearable_vec.size())
+	{
+		llwarns << "invalid index, type " << type << " index " << index << llendl; 
+	}
+	else
+	{
+		wearable_vec[index] = wearable;
+		old_wearable->setUpdated();
+		const BOOL removed = FALSE;
+		wearableUpdated(wearable, removed);
+	}
+}
+
+U32 LLWearableData::pushWearable(const LLWearableType::EType type, 
+								   LLWearable *wearable,
+								   bool trigger_updated /* = true */)
+{
+	if (wearable == NULL)
+	{
+		// no null wearables please!
+		llwarns << "Null wearable sent for type " << type << llendl;
+		return MAX_CLOTHING_PER_TYPE;
+	}
+	if (type < LLWearableType::WT_COUNT || mWearableDatas[type].size() < MAX_CLOTHING_PER_TYPE)
+	{
+		mWearableDatas[type].push_back(wearable);
+		if (trigger_updated)
+		{
+			const BOOL removed = FALSE;
+			wearableUpdated(wearable, removed);
+		}
+		return mWearableDatas[type].size()-1;
+	}
+	return MAX_CLOTHING_PER_TYPE;
+}
+
+// virtual
+void LLWearableData::wearableUpdated(LLWearable *wearable, BOOL removed)
+{
+	wearable->setUpdated();
+	// FIXME DRANO avoid updating params via wearables when rendering server-baked appearance.
+#if 0
+	if (mAvatarAppearance->isUsingServerBakes() && !mAvatarAppearance->isUsingLocalAppearance())
+	{
+		return;
+	}
+#endif
+	if (!removed)
+	{
+		pullCrossWearableValues(wearable->getType());
+	}
+}
+
+void LLWearableData::popWearable(LLWearable *wearable)
+{
+	if (wearable == NULL)
+	{
+		// nothing to do here. move along.
+		return;
+	}
+
+	U32 index = getWearableIndex(wearable);
+	const LLWearableType::EType type = wearable->getType();
+
+	if (index < MAX_CLOTHING_PER_TYPE && index < getWearableCount(type))
+	{
+		popWearable(type, index);
+	}
+}
+
+void LLWearableData::popWearable(const LLWearableType::EType type, U32 index)
+{
+	LLWearable *wearable = getWearable(type, index);
+	if (wearable)
+	{
+		mWearableDatas[type].erase(mWearableDatas[type].begin() + index);
+		const BOOL removed = TRUE;
+		wearableUpdated(wearable, removed);
+	}
+}
+
+void LLWearableData::clearWearableType(const LLWearableType::EType type)
+{
+	wearableentry_map_t::iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		return;
+	}
+	wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	wearable_vec.clear();
+}
+
+bool LLWearableData::swapWearables(const LLWearableType::EType type, U32 index_a, U32 index_b)
+{
+	wearableentry_map_t::iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		return false;
+	}
+
+	wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	if (0 > index_a || index_a >= wearable_vec.size()) return false;
+	if (0 > index_b || index_b >= wearable_vec.size()) return false;
+
+	LLWearable* wearable = wearable_vec[index_a];
+	wearable_vec[index_a] = wearable_vec[index_b];
+	wearable_vec[index_b] = wearable;
+	return true;
+}
+
+void LLWearableData::pullCrossWearableValues(const LLWearableType::EType type)
+{
+	llassert(mAvatarAppearance);
+	// scan through all of the avatar's visual parameters
+	for (LLViewerVisualParam* param = (LLViewerVisualParam*) mAvatarAppearance->getFirstVisualParam(); 
+		 param;
+		 param = (LLViewerVisualParam*) mAvatarAppearance->getNextVisualParam())
+	{
+		if( param )
+		{
+			LLDriverParam *driver_param = dynamic_cast<LLDriverParam*>(param);
+			if(driver_param)
+			{
+				// parameter is a driver parameter, have it update its cross-driven params
+				driver_param->updateCrossDrivenParams(type);
+			}
+		}
+	}
+}
+
+
+U32	LLWearableData::getWearableIndex(const LLWearable *wearable) const
+{
+	if (wearable == NULL)
+	{
+		return MAX_CLOTHING_PER_TYPE;
+	}
+
+	const LLWearableType::EType type = wearable->getType();
+	wearableentry_map_t::const_iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		llwarns << "tried to get wearable index with an invalid type!" << llendl;
+		return MAX_CLOTHING_PER_TYPE;
+	}
+	const wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	for(U32 index = 0; index < wearable_vec.size(); index++)
+	{
+		if (wearable_vec[index] == wearable)
+		{
+			return index;
+		}
+	}
+
+	return MAX_CLOTHING_PER_TYPE;
+}
+
+BOOL LLWearableData::isOnTop(LLWearable* wearable) const
+{
+	if (!wearable) return FALSE;
+	const LLWearableType::EType type = wearable->getType();
+	return ( getTopWearable(type) == wearable );
+}
+
+const LLWearable* LLWearableData::getWearable(const LLWearableType::EType type, U32 index) const
+{
+	wearableentry_map_t::const_iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		return NULL;
+	}
+	const wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	if (index>=wearable_vec.size())
+	{
+		return NULL;
+	}
+	else
+	{
+		return wearable_vec[index];
+	}
+}
+
+LLWearable* LLWearableData::getTopWearable(const LLWearableType::EType type)
+{
+	U32 count = getWearableCount(type);
+	if ( count == 0)
+	{
+		return NULL;
+	}
+
+	return getWearable(type, count-1);
+}
+
+const LLWearable* LLWearableData::getTopWearable(const LLWearableType::EType type) const
+{
+	U32 count = getWearableCount(type);
+	if ( count == 0)
+	{
+		return NULL;
+	}
+
+	return getWearable(type, count-1);
+}
+
+LLWearable* LLWearableData::getBottomWearable(const LLWearableType::EType type)
+{
+	if (getWearableCount(type) == 0)
+	{
+		return NULL;
+	}
+
+	return getWearable(type, 0);
+}
+
+const LLWearable* LLWearableData::getBottomWearable(const LLWearableType::EType type) const
+{
+	if (getWearableCount(type) == 0)
+	{
+		return NULL;
+	}
+
+	return getWearable(type, 0);
+}
+
+U32 LLWearableData::getWearableCount(const LLWearableType::EType type) const
+{
+	wearableentry_map_t::const_iterator wearable_iter = mWearableDatas.find(type);
+	if (wearable_iter == mWearableDatas.end())
+	{
+		return 0;
+	}
+	const wearableentry_vec_t& wearable_vec = wearable_iter->second;
+	return wearable_vec.size();
+}
+
+U32 LLWearableData::getWearableCount(const U32 tex_index) const
+{
+	const LLWearableType::EType wearable_type = LLAvatarAppearanceDictionary::getTEWearableType((LLAvatarAppearanceDefines::ETextureIndex)tex_index);
+	return getWearableCount(wearable_type);
+}
+
+LLUUID LLWearableData::computeBakedTextureHash(LLAvatarAppearanceDefines::EBakedTextureIndex baked_index,
+												 BOOL generate_valid_hash) // Set to false if you want to upload the baked texture w/o putting it in the cache
+{
+	LLUUID hash_id;
+	bool hash_computed = false;
+	LLMD5 hash;
+	const LLAvatarAppearanceDictionary::BakedEntry *baked_dict = LLAvatarAppearanceDictionary::getInstance()->getBakedTexture(baked_index);
+
+	for (U8 i=0; i < baked_dict->mWearables.size(); i++)
+	{
+		const LLWearableType::EType baked_type = baked_dict->mWearables[i];
+		const U32 num_wearables = getWearableCount(baked_type);
+		for (U32 index = 0; index < num_wearables; ++index)
+		{
+			const LLWearable* wearable = getWearable(baked_type,index);
+			if (wearable)
+			{
+				wearable->addToBakedTextureHash(hash);
+				hash_computed = true;
+			}
+		}
+	}
+	if (hash_computed)
+	{
+		hash.update((const unsigned char*)baked_dict->mWearablesHashID.mData, UUID_BYTES);
+
+		if (!generate_valid_hash)
+		{
+			invalidateBakedTextureHash(hash);
+		}
+		hash.finalize();
+		hash.raw_digest(hash_id.mData);
+	}
+
+	return hash_id;
+}
+
+