1 files changed, 532 insertions, 232 deletions

diff --git a/indra/newview/llviewertexture.cpp b/indra/newview/llviewertexture.cpp
index 279570a0e8..4da0f80a00 100644
--- a/indra/newview/llviewertexture.cpp
+++ b/indra/newview/llviewertexture.cpp
@@ -2,31 +2,25 @@
  * @file llviewertexture.cpp
  * @brief Object which handles a received image (and associated texture(s))
  *
- * $LicenseInfo:firstyear=2000&license=viewergpl$
- * 
- * Copyright (c) 2000-2009, Linden Research, Inc.
- * 
+ * $LicenseInfo:firstyear=2000&license=viewerlgpl$
  * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab.  Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 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.
  * 
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 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.
  * 
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
+ * 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
  * 
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
 
@@ -78,6 +72,7 @@ LLPointer<LLViewerFetchedTexture> LLViewerFetchedTexture::sDefaultImagep = NULL;
 LLPointer<LLViewerFetchedTexture> LLViewerFetchedTexture::sSmokeImagep = NULL;
 LLViewerMediaTexture::media_map_t LLViewerMediaTexture::sMediaMap ;
 LLTexturePipelineTester* LLViewerTextureManager::sTesterp = NULL ;
+const std::string sTesterName("TextureTester");
 
 S32 LLViewerTexture::sImageCount = 0;
 S32 LLViewerTexture::sRawCount = 0;
@@ -112,13 +107,53 @@ const F64 log_2 = log(2.0);
 LLLoadedCallbackEntry::LLLoadedCallbackEntry(loaded_callback_func cb,
 					  S32 discard_level,
 					  BOOL need_imageraw, // Needs image raw for the callback
-					  void* userdata ) 
+					  void* userdata,
+					  LLLoadedCallbackEntry::source_callback_list_t* src_callback_list,
+					  LLViewerFetchedTexture* target,
+					  BOOL pause) 
 	: mCallback(cb),
 	  mLastUsedDiscard(MAX_DISCARD_LEVEL+1),
 	  mDesiredDiscard(discard_level),
 	  mNeedsImageRaw(need_imageraw),
-	  mUserData(userdata)
+	  mUserData(userdata),
+	  mSourceCallbackList(src_callback_list),
+	  mPaused(pause)
+{
+	if(mSourceCallbackList)
+	{
+		mSourceCallbackList->insert(target->getID());
+	}
+}
+
+LLLoadedCallbackEntry::~LLLoadedCallbackEntry()
+{
+}
+
+void LLLoadedCallbackEntry::removeTexture(LLViewerFetchedTexture* tex)
 {
+	if(mSourceCallbackList)
+	{
+		mSourceCallbackList->erase(tex->getID()) ;
+	}
+}
+
+//static 
+void LLLoadedCallbackEntry::cleanUpCallbackList(LLLoadedCallbackEntry::source_callback_list_t* callback_list)
+{
+	//clear texture callbacks.
+	if(callback_list && !callback_list->empty())
+	{
+		for(LLLoadedCallbackEntry::source_callback_list_t::iterator iter = callback_list->begin();
+				iter != callback_list->end(); ++iter)
+		{
+			LLViewerFetchedTexture* tex = gTextureList.findImage(*iter) ;
+			if(tex)
+			{
+				tex->deleteCallbackEntry(callback_list) ;			
+			}
+		}
+		callback_list->clear() ;
+	}
 }
 
 LLViewerMediaTexture* LLViewerTextureManager::createMediaTexture(const LLUUID &media_id, BOOL usemipmaps, LLImageGL* gl_image)
@@ -307,9 +342,14 @@ void LLViewerTextureManager::init()
 
 	LLViewerTexture::initClass() ;
 
-	if(LLFastTimer::sMetricLog)
+	if (LLMetricPerformanceTesterBasic::isMetricLogRequested(sTesterName) && !LLMetricPerformanceTesterBasic::getTester(sTesterName))
 	{
-		LLViewerTextureManager::sTesterp = new LLTexturePipelineTester() ;
+		sTesterp = new LLTexturePipelineTester() ;
+		if (!sTesterp->isValid())
+		{
+			delete sTesterp;
+			sTesterp = NULL;
+		}
 	}
 }
 
@@ -324,9 +364,7 @@ void LLViewerTextureManager::cleanup()
 	LLViewerFetchedTexture::sMissingAssetImagep = NULL;
 	LLViewerFetchedTexture::sWhiteImagep = NULL;
 
-	LLViewerMediaTexture::cleanup() ;	
-
-	LLViewerTexture::cleanupClass() ;
+	LLViewerMediaTexture::cleanUpClass() ;	
 }
 
 //----------------------------------------------------------------------------------------------
@@ -345,11 +383,6 @@ void LLViewerTexture::initClass()
 }
 
 // static
-void LLViewerTexture::cleanupClass()
-{
-}
-
-// static
 S32 LLViewerTexture::getTotalNumOfCategories() 
 {
 	return MAX_GL_IMAGE_CATEGORY - (BOOST_HIGH - BOOST_SCULPTED) + 2 ;
@@ -381,9 +414,10 @@ void LLViewerTexture::updateClass(const F32 velocity, const F32 angular_velocity
 {
 	sCurrentTime = gFrameTimeSeconds ;
 
-	if(LLViewerTextureManager::sTesterp)
+	LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+	if (tester)
 	{
-		LLViewerTextureManager::sTesterp->update() ;
+		tester->update() ;
 	}
 	LLViewerMediaTexture::updateClass() ;
 
@@ -460,6 +494,7 @@ LLViewerTexture::LLViewerTexture(const U32 width, const U32 height, const U8 com
 	mFullHeight = height ;
 	mUseMipMaps = usemipmaps ;
 	mComponents = components ;
+	setTexelsPerImage();
 
 	mID.generate();
 	sImageCount++;
@@ -478,6 +513,7 @@ LLViewerTexture::LLViewerTexture(const LLImageRaw* raw, BOOL usemipmaps)
 
 LLViewerTexture::~LLViewerTexture()
 {
+	cleanup();
 	sImageCount--;
 }
 
@@ -487,15 +523,16 @@ void LLViewerTexture::init(bool firstinit)
 
 	mFullWidth = 0;
 	mFullHeight = 0;
+	mTexelsPerImage = 0 ;
 	mUseMipMaps = FALSE ;
 	mComponents = 0 ;
 
 	mTextureState = NO_DELETE ;
 	mDontDiscard = FALSE;
-	mCanResetMaxVirtualSize = true ;
 	mMaxVirtualSize = 0.f;
 	mNeedsGLTexture = FALSE ;
-	mNeedsResetMaxVirtualSize = FALSE ;
+	mMaxVirtualSizeResetInterval = 1;
+	mMaxVirtualSizeResetCounter = mMaxVirtualSizeResetInterval ;
 	mAdditionalDecodePriority = 0.f ;	
 	mParcelMedia = NULL ;
 	mNumFaces = 0 ;
@@ -541,11 +578,6 @@ void LLViewerTexture::setBoostLevel(S32 level)
 		if(mBoostLevel != LLViewerTexture::BOOST_NONE)
 		{
 			setNoDelete() ;		
-
-			if(LLViewerTexture::BOOST_AVATAR_BAKED_SELF == mBoostLevel || LLViewerTexture::BOOST_AVATAR_BAKED == mBoostLevel)
-			{
-				mCanResetMaxVirtualSize = false ;
-			}
 		}
 		if(gAuditTexture)
 		{
@@ -578,9 +610,10 @@ bool LLViewerTexture::bindDefaultImage(S32 stage)
 	//check if there is cached raw image and switch to it if possible
 	switchToCachedImage() ;
 
-	if(LLViewerTextureManager::sTesterp)
+	LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+	if (tester)
 	{
-		LLViewerTextureManager::sTesterp->updateGrayTextureBinding() ;
+		tester->updateGrayTextureBinding() ;
 	}
 	return res;
 }
@@ -603,10 +636,10 @@ void LLViewerTexture::addTextureStats(F32 virtual_size, BOOL needs_gltexture) co
 		mNeedsGLTexture = TRUE ;
 	}
 
-	if(mNeedsResetMaxVirtualSize)
+	if(!mMaxVirtualSizeResetCounter)
 	{
 		//flag to reset the values because the old values are used.
-		mNeedsResetMaxVirtualSize = FALSE ;
+		resetMaxVirtualSizeResetCounter() ;
 		mMaxVirtualSize = virtual_size;		
 		mAdditionalDecodePriority = 0.f ;	
 		mNeedsGLTexture = needs_gltexture ;
@@ -621,7 +654,7 @@ void LLViewerTexture::resetTextureStats()
 {
 	mMaxVirtualSize = 0.0f ;
 	mAdditionalDecodePriority = 0.f ;	
-	mNeedsResetMaxVirtualSize = FALSE ;
+	mMaxVirtualSizeResetCounter = 0 ;
 }
 
 //virtual 
@@ -783,7 +816,7 @@ void LLViewerTexture::generateGLTexture()
 LLImageGL* LLViewerTexture::getGLTexture() const
 {
 	llassert(mGLTexturep.notNull()) ;
-	
+
 	return mGLTexturep ;
 }
 
@@ -807,7 +840,8 @@ BOOL LLViewerTexture::createGLTexture(S32 discard_level, const LLImageRaw* image
 	{
 		mFullWidth = mGLTexturep->getCurrentWidth() ;
 		mFullHeight = mGLTexturep->getCurrentHeight() ; 
-		mComponents = mGLTexturep->getComponents() ;		
+		mComponents = mGLTexturep->getComponents() ;	
+		setTexelsPerImage();
 	}
 
 	return ret ;
@@ -1025,17 +1059,25 @@ void LLViewerTexture::destroyGLTexture()
 	}	
 }
 
+void LLViewerTexture::setTexelsPerImage()
+{
+	S32 fullwidth = llmin(mFullWidth,(S32)MAX_IMAGE_SIZE_DEFAULT);
+	S32 fullheight = llmin(mFullHeight,(S32)MAX_IMAGE_SIZE_DEFAULT);
+	mTexelsPerImage = (F32)fullwidth * fullheight;
+}
+
 BOOL LLViewerTexture::isLargeImage()
 {
-	return mFullWidth * mFullHeight > LLViewerTexture::sMinLargeImageSize ;
+	return  (S32)mTexelsPerImage > LLViewerTexture::sMinLargeImageSize ;
 }
 
 //virtual 
 void LLViewerTexture::updateBindStatsForTester()
 {
-	if(LLViewerTextureManager::sTesterp)
+	LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+	if (tester)
 	{
-		LLViewerTextureManager::sTesterp->updateTextureBindingStats(this) ;
+		tester->updateTextureBindingStats(this) ;
 	}
 }
 
@@ -1097,7 +1139,8 @@ void LLViewerFetchedTexture::init(bool firstinit)
 	// does not contain this image.
 	mIsMissingAsset = FALSE;
 
-	mLoadedCallbackDesiredDiscardLevel = 0;
+	mLoadedCallbackDesiredDiscardLevel = S8_MAX;
+	mPauseLoadedCallBacks = TRUE ;
 
 	mNeedsCreateTexture = FALSE;
 	
@@ -1121,9 +1164,12 @@ void LLViewerFetchedTexture::init(bool firstinit)
 
 	mSavedRawImage = NULL ;
 	mForceToSaveRawImage  = FALSE ;
+	mSaveRawImage = FALSE ;
 	mSavedRawDiscardLevel = -1 ;
 	mDesiredSavedRawDiscardLevel = -1 ;
 	mLastReferencedSavedRawImageTime = 0.0f ;
+	mKeptSavedRawImageTime = 0.f ;
+	mLastCallBackActiveTime = 0.f;
 }
 
 LLViewerFetchedTexture::~LLViewerFetchedTexture()
@@ -1153,6 +1199,7 @@ void LLViewerFetchedTexture::cleanup()
 		// We never finished loading the image.  Indicate failure.
 		// Note: this allows mLoadedCallbackUserData to be cleaned up.
 		entryp->mCallback( FALSE, this, NULL, NULL, 0, TRUE, entryp->mUserData );
+		entryp->removeTexture(this) ;
 		delete entryp;
 	}
 	mLoadedCallbackList.clear();
@@ -1168,12 +1215,15 @@ void LLViewerFetchedTexture::cleanup()
 
 void LLViewerFetchedTexture::setForSculpt()
 {
+	static const S32 MAX_INTERVAL = 8 ; //frames
+
 	mForSculpt = TRUE ;
 	if(isForSculptOnly() && !getBoundRecently())
 	{
 		destroyGLTexture() ; //sculpt image does not need gl texture.
 	}
 	checkCachedRawSculptImage() ;
+	setMaxVirtualSizeResetInterval(MAX_INTERVAL) ;
 }
 
 BOOL LLViewerFetchedTexture::isForSculptOnly() const
@@ -1366,69 +1416,68 @@ BOOL LLViewerFetchedTexture::createTexture(S32 usename/*= 0*/)
 // 						mRawImage->getWidth(), mRawImage->getHeight(),mRawImage->getDataSize())
 // 			<< mID.getString() << llendl;
 	BOOL res = TRUE;
-	if (!gNoRender)
+
+	// store original size only for locally-sourced images
+	if (mUrl.compare(0, 7, "file://") == 0)
 	{
-		// store original size only for locally-sourced images
-		if (mUrl.compare(0, 7, "file://") == 0)
-		{
-			mOrigWidth = mRawImage->getWidth();
-			mOrigHeight = mRawImage->getHeight();
+		mOrigWidth = mRawImage->getWidth();
+		mOrigHeight = mRawImage->getHeight();
 
 			
-			if (mBoostLevel == BOOST_PREVIEW)
-			{ 
-				mRawImage->biasedScaleToPowerOfTwo(1024);
-			}
-			else
-			{ // leave black border, do not scale image content
-				mRawImage->expandToPowerOfTwo(MAX_IMAGE_SIZE, FALSE);
-			}
-			
-			mFullWidth = mRawImage->getWidth();
-			mFullHeight = mRawImage->getHeight();
+		if (mBoostLevel == BOOST_PREVIEW)
+		{ 
+			mRawImage->biasedScaleToPowerOfTwo(1024);
 		}
 		else
-		{
-			mOrigWidth = mFullWidth;
-			mOrigHeight = mFullHeight;
-		}
-
-		bool size_okay = true;
-		
-		U32 raw_width = mRawImage->getWidth() << mRawDiscardLevel;
-		U32 raw_height = mRawImage->getHeight() << mRawDiscardLevel;
-		if( raw_width > MAX_IMAGE_SIZE || raw_height > MAX_IMAGE_SIZE )
-		{
-			llinfos << "Width or height is greater than " << MAX_IMAGE_SIZE << ": (" << raw_width << "," << raw_height << ")" << llendl;
-			size_okay = false;
-		}
-		
-		if (!LLImageGL::checkSize(mRawImage->getWidth(), mRawImage->getHeight()))
-		{
-			// A non power-of-two image was uploaded (through a non standard client)
-			llinfos << "Non power of two width or height: (" << mRawImage->getWidth() << "," << mRawImage->getHeight() << ")" << llendl;
-			size_okay = false;
+		{ // leave black border, do not scale image content
+			mRawImage->expandToPowerOfTwo(MAX_IMAGE_SIZE, FALSE);
 		}
 		
-		if( !size_okay )
-		{
-			// An inappropriately-sized image was uploaded (through a non standard client)
-			// We treat these images as missing assets which causes them to
-			// be renderd as 'missing image' and to stop requesting data
-			setIsMissingAsset();
-			destroyRawImage();
-			return FALSE;
-		}
-		
-		if(!(res = insertToAtlas()))
-		{
-			res = mGLTexturep->createGLTexture(mRawDiscardLevel, mRawImage, usename, TRUE, mBoostLevel);
-			resetFaceAtlas() ;
-		}
-		setActive() ;
+		mFullWidth = mRawImage->getWidth();
+		mFullHeight = mRawImage->getHeight();
+		setTexelsPerImage();
+	}
+	else
+	{
+		mOrigWidth = mFullWidth;
+		mOrigHeight = mFullHeight;
 	}
 
-	if (!mForceToSaveRawImage)
+	bool size_okay = true;
+	
+	U32 raw_width = mRawImage->getWidth() << mRawDiscardLevel;
+	U32 raw_height = mRawImage->getHeight() << mRawDiscardLevel;
+	if( raw_width > MAX_IMAGE_SIZE || raw_height > MAX_IMAGE_SIZE )
+	{
+		llinfos << "Width or height is greater than " << MAX_IMAGE_SIZE << ": (" << raw_width << "," << raw_height << ")" << llendl;
+		size_okay = false;
+	}
+	
+	if (!LLImageGL::checkSize(mRawImage->getWidth(), mRawImage->getHeight()))
+	{
+		// A non power-of-two image was uploaded (through a non standard client)
+		llinfos << "Non power of two width or height: (" << mRawImage->getWidth() << "," << mRawImage->getHeight() << ")" << llendl;
+		size_okay = false;
+	}
+	
+	if( !size_okay )
+	{
+		// An inappropriately-sized image was uploaded (through a non standard client)
+		// We treat these images as missing assets which causes them to
+		// be renderd as 'missing image' and to stop requesting data
+		setIsMissingAsset();
+		destroyRawImage();
+		return FALSE;
+	}
+	
+	if(!(res = insertToAtlas()))
+	{
+		res = mGLTexturep->createGLTexture(mRawDiscardLevel, mRawImage, usename, TRUE, mBoostLevel);
+		resetFaceAtlas() ;
+	}
+	setActive() ;
+
+	if (!needsToSaveRawImage())
 	{
 		mNeedsAux = FALSE;
 		destroyRawImage();
@@ -1454,47 +1503,63 @@ void LLViewerFetchedTexture::setKnownDrawSize(S32 width, S32 height)
 //virtual
 void LLViewerFetchedTexture::processTextureStats()
 {
-	if(mFullyLoaded)//already loaded
-	{
-		return ;
-	}
-
-	updateVirtualSize() ;
-	
-	static LLCachedControl<bool> textures_fullres(gSavedSettings,"TextureLoadFullRes");
-	
-	if (textures_fullres)
-	{
-		mDesiredDiscardLevel = 0;
-	}
-	else if(!mFullWidth || !mFullHeight)
-	{
-		mDesiredDiscardLevel = 	getMaxDiscardLevel() ;
+	if(mFullyLoaded)
+	{		
+		if(mDesiredDiscardLevel > mMinDesiredDiscardLevel)//need to load more
+		{
+			mDesiredDiscardLevel = llmin(mDesiredDiscardLevel, mMinDesiredDiscardLevel) ;
+			mFullyLoaded = FALSE ;
+		}
 	}
 	else
-	{	
-		if(!mKnownDrawWidth || !mKnownDrawHeight || mFullWidth <= mKnownDrawWidth || mFullHeight <= mKnownDrawHeight)
+	{
+		updateVirtualSize() ;
+		
+		static LLCachedControl<bool> textures_fullres(gSavedSettings,"TextureLoadFullRes");
+		
+		if (textures_fullres)
 		{
-			if (mFullWidth > MAX_IMAGE_SIZE_DEFAULT || mFullHeight > MAX_IMAGE_SIZE_DEFAULT)
+			mDesiredDiscardLevel = 0;
+		}
+		else if(!mFullWidth || !mFullHeight)
+		{
+			mDesiredDiscardLevel = 	llmin(getMaxDiscardLevel(), (S32)mLoadedCallbackDesiredDiscardLevel) ;
+		}
+		else
+		{	
+			if(!mKnownDrawWidth || !mKnownDrawHeight || mFullWidth <= mKnownDrawWidth || mFullHeight <= mKnownDrawHeight)
 			{
-				mDesiredDiscardLevel = 1; // MAX_IMAGE_SIZE_DEFAULT = 1024 and max size ever is 2048
+				if (mFullWidth > MAX_IMAGE_SIZE_DEFAULT || mFullHeight > MAX_IMAGE_SIZE_DEFAULT)
+				{
+					mDesiredDiscardLevel = 1; // MAX_IMAGE_SIZE_DEFAULT = 1024 and max size ever is 2048
+				}
+				else
+				{
+					mDesiredDiscardLevel = 0;
+				}
 			}
-			else
+			else if(mKnownDrawSizeChanged)//known draw size is set
+			{			
+				mDesiredDiscardLevel = (S8)llmin(log((F32)mFullWidth / mKnownDrawWidth) / log_2, 
+													 log((F32)mFullHeight / mKnownDrawHeight) / log_2) ;
+				mDesiredDiscardLevel = 	llclamp(mDesiredDiscardLevel, (S8)0, (S8)getMaxDiscardLevel()) ;
+				mDesiredDiscardLevel = llmin(mDesiredDiscardLevel, mMinDesiredDiscardLevel) ;
+			}
+			mKnownDrawSizeChanged = FALSE ;
+		
+			if(getDiscardLevel() >= 0 && (getDiscardLevel() <= mDesiredDiscardLevel))
 			{
-				mDesiredDiscardLevel = 0;
+				mFullyLoaded = TRUE ;
 			}
 		}
-		else if(mKnownDrawSizeChanged)//known draw size is set
-		{			
-			mDesiredDiscardLevel = (S8)llmin(log((F32)mFullWidth / mKnownDrawWidth) / log_2, 
-					                             log((F32)mFullHeight / mKnownDrawHeight) / log_2) ;
-			mDesiredDiscardLevel = 	llclamp(mDesiredDiscardLevel, (S8)0, (S8)getMaxDiscardLevel()) ;
-		}
-		mKnownDrawSizeChanged = FALSE ;
-		
-		if(getDiscardLevel() >= 0 && (getDiscardLevel() <= mDesiredDiscardLevel))
+	}
+
+	if(mForceToSaveRawImage && mDesiredSavedRawDiscardLevel >= 0) //force to refetch the texture.
+	{
+		mDesiredDiscardLevel = llmin(mDesiredDiscardLevel, (S8)mDesiredSavedRawDiscardLevel) ;
+		if(getDiscardLevel() < 0 || getDiscardLevel() > mDesiredDiscardLevel)
 		{
-			mFullyLoaded = TRUE ;
+			mFullyLoaded = FALSE ;
 		}
 	}
 }
@@ -1521,36 +1586,37 @@ F32 LLViewerFetchedTexture::calcDecodePriority()
 	}
 	if(mFullyLoaded && !mForceToSaveRawImage)//already loaded for static texture
 	{
-		return -4.0f ; //alreay fetched
+		return -1.0f ; //alreay fetched
 	}
 
 	S32 cur_discard = getCurrentDiscardLevelForFetching();
 	bool have_all_data = (cur_discard >= 0 && (cur_discard <= mDesiredDiscardLevel));
-	F32 pixel_priority = fsqrtf(mMaxVirtualSize);
+	F32 pixel_priority = (F32) sqrt(mMaxVirtualSize);
 
 	F32 priority = 0.f;
+
 	if (mIsMissingAsset)
 	{
 		priority = 0.0f;
 	}
 	else if(mDesiredDiscardLevel >= cur_discard && cur_discard > -1)
 	{
-		priority = -1.0f ;
+		priority = -2.0f ;
 	}
 	else if(mCachedRawDiscardLevel > -1 && mDesiredDiscardLevel >= mCachedRawDiscardLevel)
 	{
-		priority = -1.0f;
+		priority = -3.0f;
 	}
 	else if (mDesiredDiscardLevel > getMaxDiscardLevel())
 	{
 		// Don't decode anything we don't need
-		priority = -1.0f;
+		priority = -4.0f;
 	}
 	else if ((mBoostLevel == LLViewerTexture::BOOST_UI || mBoostLevel == LLViewerTexture::BOOST_ICON) && !have_all_data)
 	{
 		priority = 1.f;
 	}
-	else if (pixel_priority <= 0.f && !have_all_data)
+	else if (pixel_priority < 0.001f && !have_all_data)
 	{
 		// Not on screen but we might want some data
 		if (mBoostLevel > BOOST_HIGH)
@@ -1560,7 +1626,7 @@ F32 LLViewerFetchedTexture::calcDecodePriority()
 		}
 		else
 		{
-			priority = -1.f; //stop fetching
+			priority = -5.f; //stop fetching
 		}
 	}
 	else if (cur_discard < 0)
@@ -1572,21 +1638,18 @@ F32 LLViewerFetchedTexture::calcDecodePriority()
 		S32 ddiscard = MAX_DISCARD_LEVEL - (S32)desired;
 		ddiscard = llclamp(ddiscard, 0, MAX_DELTA_DISCARD_LEVEL_FOR_PRIORITY);
 		priority = (ddiscard + 1) * PRIORITY_DELTA_DISCARD_LEVEL_FACTOR;
+		setAdditionalDecodePriority(1.0f) ;//boost the textures without any data so far.
 	}
 	else if ((mMinDiscardLevel > 0) && (cur_discard <= mMinDiscardLevel))
 	{
 		// larger mips are corrupted
-		priority = -3.0f;
+		priority = -6.0f;
 	}
 	else
 	{
 		// priority range = 100,000 - 500,000
 		S32 desired_discard = mDesiredDiscardLevel;
-		if (getDontDiscard())
-		{
-			desired_discard -= 2;
-		}
-		else if (!isJustBound() && mCachedRawImageReady)
+		if (!isJustBound() && mCachedRawImageReady)
 		{
 			if(mBoostLevel < BOOST_HIGH)
 			{
@@ -1602,7 +1665,7 @@ F32 LLViewerFetchedTexture::calcDecodePriority()
 
 		S32 ddiscard = cur_discard - desired_discard;
 		ddiscard = llclamp(ddiscard, -1, MAX_DELTA_DISCARD_LEVEL_FOR_PRIORITY);
-		priority = (ddiscard + 1) * PRIORITY_DELTA_DISCARD_LEVEL_FACTOR;
+		priority = (ddiscard + 1) * PRIORITY_DELTA_DISCARD_LEVEL_FACTOR;		
 	}
 
 	// Priority Formula:
@@ -1610,19 +1673,51 @@ F32 LLViewerFetchedTexture::calcDecodePriority()
 	// [10,000,000] + [1,000,000-9,000,000]  + [100,000-500,000]   + [1-20,000]  + [0-999]
 	if (priority > 0.0f)
 	{
+		bool large_enough = mCachedRawImageReady && ((S32)mTexelsPerImage > sMinLargeImageSize) ;
+		if(large_enough)
+		{
+			//Note: 
+			//to give small, low-priority textures some chance to be fetched, 
+			//cut the priority in half if the texture size is larger than 256 * 256 and has a 64*64 ready.
+			priority *= 0.5f ; 
+		}
+
 		pixel_priority = llclamp(pixel_priority, 0.0f, MAX_PRIORITY_PIXEL); 
 
 		priority += pixel_priority + PRIORITY_BOOST_LEVEL_FACTOR * mBoostLevel;
 
 		if ( mBoostLevel > BOOST_HIGH)
 		{
-			priority += PRIORITY_BOOST_HIGH_FACTOR;
+			if(mBoostLevel > BOOST_SUPER_HIGH)
+			{
+				//for very important textures, always grant the highest priority.
+				priority += PRIORITY_BOOST_HIGH_FACTOR;
+			}
+			else if(mCachedRawImageReady)
+			{
+				//Note: 
+				//to give small, low-priority textures some chance to be fetched, 
+				//if high priority texture has a 64*64 ready, lower its fetching priority.
+				setAdditionalDecodePriority(0.5f) ;
+			}
+			else
+			{
+				priority += PRIORITY_BOOST_HIGH_FACTOR;
+			}
 		}		
 
 		if(mAdditionalDecodePriority > 0.0f)
 		{
 			// priority range += 1,000,000.f-9,000,000.f
-			priority += PRIORITY_ADDITIONAL_FACTOR * (1.0 + mAdditionalDecodePriority * MAX_ADDITIONAL_LEVEL_FOR_PRIORITY);
+			F32 additional = PRIORITY_ADDITIONAL_FACTOR * (1.0 + mAdditionalDecodePriority * MAX_ADDITIONAL_LEVEL_FOR_PRIORITY);
+			if(large_enough)
+			{
+				//Note: 
+				//to give small, low-priority textures some chance to be fetched, 
+				//cut the additional priority to a quarter if the texture size is larger than 256 * 256 and has a 64*64 ready.
+				additional *= 0.25f ;
+			}
+			priority += additional;
 		}
 	}
 	return priority;
@@ -1647,6 +1742,11 @@ void LLViewerFetchedTexture::setDecodePriority(F32 priority)
 	llassert(!mInImageList); 
     
 	mDecodePriority = priority;
+
+	if(mDecodePriority < F_ALMOST_ZERO)
+	{
+		mStopFetchingTimer.reset() ;
+	}
 }
 
 void LLViewerFetchedTexture::setAdditionalDecodePriority(F32 priority)
@@ -1660,16 +1760,11 @@ void LLViewerFetchedTexture::setAdditionalDecodePriority(F32 priority)
 
 void LLViewerFetchedTexture::updateVirtualSize() 
 {	
-	if(mNeedsResetMaxVirtualSize)
+	if(!mMaxVirtualSizeResetCounter)
 	{
 		addTextureStats(0.f, FALSE) ;//reset
 	}
 
-	if(mForceToSaveRawImage)
-	{
-		setAdditionalDecodePriority(0.75f) ; //boost the fetching priority
-	}
-
 	for(U32 i = 0 ; i < mNumFaces ; i++)
 	{				
 		LLFace* facep = mFaceList[i] ;
@@ -1680,9 +1775,9 @@ void LLViewerFetchedTexture::updateVirtualSize()
 		}
 	}
 
-	if(mCanResetMaxVirtualSize)
+	if(mMaxVirtualSizeResetCounter > 0)
 	{
-		mNeedsResetMaxVirtualSize = TRUE ;
+		mMaxVirtualSizeResetCounter--;
 	}
 	reorganizeFaceList() ;
 	reorganizeVolumeList();
@@ -1745,7 +1840,7 @@ bool LLViewerFetchedTexture::updateFetch()
 	S32 current_discard = getCurrentDiscardLevelForFetching() ;
 	S32 desired_discard = getDesiredDiscardLevel();
 	F32 decode_priority = getDecodePriority();
-	decode_priority = llmax(decode_priority, 0.0f);
+	decode_priority = llclamp(decode_priority, 0.0f, maxDecodePriority());
 
 	if (mIsFetching)
 	{
@@ -1760,6 +1855,7 @@ bool LLViewerFetchedTexture::updateFetch()
 		if (finished)
 		{
 			mIsFetching = FALSE;
+			mLastPacketTimer.reset() ;
 		}
 		else
 		{
@@ -1770,10 +1866,11 @@ bool LLViewerFetchedTexture::updateFetch()
 		// We may have data ready regardless of whether or not we are finished (e.g. waiting on write)
 		if (mRawImage.notNull())
 		{
-			if(LLViewerTextureManager::sTesterp)
+			LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+			if (tester)
 			{
 				mIsFetched = TRUE ;
-				LLViewerTextureManager::sTesterp->updateTextureLoadingStats(this, mRawImage, LLAppViewer::getTextureFetch()->isFromLocalCache(mID)) ;
+				tester->updateTextureLoadingStats(this, mRawImage, LLAppViewer::getTextureFetch()->isFromLocalCache(mID)) ;
 			}
 			mRawDiscardLevel = fetch_discard;
 			if ((mRawImage->getDataSize() > 0 && mRawDiscardLevel >= 0) &&
@@ -1781,6 +1878,7 @@ bool LLViewerFetchedTexture::updateFetch()
 			{
 				mFullWidth = mRawImage->getWidth() << mRawDiscardLevel;
 				mFullHeight = mRawImage->getHeight() << mRawDiscardLevel;
+				setTexelsPerImage();
 
 				if(mFullWidth > MAX_IMAGE_SIZE || mFullHeight > MAX_IMAGE_SIZE)
 				{ 
@@ -1789,6 +1887,7 @@ bool LLViewerFetchedTexture::updateFetch()
 					setIsMissingAsset();
 					mRawDiscardLevel = INVALID_DISCARD_LEVEL ;
 					mIsFetching = FALSE ;
+					mLastPacketTimer.reset();
 				}
 				else
 				{
@@ -1840,7 +1939,12 @@ bool LLViewerFetchedTexture::updateFetch()
 // 				llinfos << "Calling updateRequestPriority() with decode_priority = 0.0f" << llendl;
 // 				calcDecodePriority();
 // 			}
-			LLAppViewer::getTextureFetch()->updateRequestPriority(mID, decode_priority);
+			static const F32 MAX_HOLD_TIME = 5.0f ; //seconds to wait before canceling fecthing if decode_priority is 0.f.
+			if(decode_priority > 0.0f || mStopFetchingTimer.getElapsedTimeF32() > MAX_HOLD_TIME)
+			{
+				mStopFetchingTimer.reset() ;
+				LLAppViewer::getTextureFetch()->updateRequestPriority(mID, decode_priority);
+			}
 		}
 	}
 
@@ -1900,6 +2004,12 @@ bool LLViewerFetchedTexture::updateFetch()
 			h = mGLTexturep->getHeight(0);
 			c = mComponents;
 		}
+
+		const U32 override_tex_discard_level = gSavedSettings.getU32("TextureDiscardLevel");
+		if (override_tex_discard_level != 0)
+		{
+			desired_discard = override_tex_discard_level;
+		}
 		
 		// bypass texturefetch directly by pulling from LLTextureCache
 		bool fetch_request_created = false;
@@ -1950,6 +2060,7 @@ void LLViewerFetchedTexture::setIsMissingAsset()
 		LLAppViewer::getTextureFetch()->deleteRequest(getID(), true);
 		mHasFetcher = FALSE;
 		mIsFetching = FALSE;
+		mLastPacketTimer.reset();
 		mFetchState = 0;
 		mFetchPriority = 0;
 	}
@@ -1957,7 +2068,8 @@ void LLViewerFetchedTexture::setIsMissingAsset()
 }
 
 void LLViewerFetchedTexture::setLoadedCallback( loaded_callback_func loaded_callback,
-									   S32 discard_level, BOOL keep_imageraw, BOOL needs_aux, void* userdata)
+									   S32 discard_level, BOOL keep_imageraw, BOOL needs_aux, void* userdata, 
+									   LLLoadedCallbackEntry::source_callback_list_t* src_callback_list, BOOL pause)
 {
 	//
 	// Don't do ANYTHING here, just add it to the global callback list
@@ -1973,26 +2085,185 @@ void LLViewerFetchedTexture::setLoadedCallback( loaded_callback_func loaded_call
 		mLoadedCallbackDesiredDiscardLevel = llmin(mLoadedCallbackDesiredDiscardLevel, (S8)discard_level) ;
 	}
 
-	LLLoadedCallbackEntry* entryp = new LLLoadedCallbackEntry(loaded_callback, discard_level, keep_imageraw, userdata);
-	mLoadedCallbackList.push_back(entryp);
+	if(mPauseLoadedCallBacks && !pause)
+	{
+		unpauseLoadedCallbacks(src_callback_list) ;
+	}
+	LLLoadedCallbackEntry* entryp = new LLLoadedCallbackEntry(loaded_callback, discard_level, keep_imageraw, userdata, src_callback_list, this, pause);
+	mLoadedCallbackList.push_back(entryp);	
+
 	mNeedsAux |= needs_aux;
 	if(keep_imageraw)
 	{
-		forceToSaveRawImage(discard_level) ;
+		mSaveRawImage = TRUE ;
 	}
 	if (mNeedsAux && mAuxRawImage.isNull() && getDiscardLevel() >= 0)
 	{
 		// We need aux data, but we've already loaded the image, and it didn't have any
 		llwarns << "No aux data available for callback for image:" << getID() << llendl;
 	}
+	mLastCallBackActiveTime = sCurrentTime ;
+}
+
+void LLViewerFetchedTexture::clearCallbackEntryList()
+{
+	if(mLoadedCallbackList.empty())
+	{
+		return ;
+	}
+
+	for(callback_list_t::iterator iter = mLoadedCallbackList.begin();
+			iter != mLoadedCallbackList.end(); )
+	{
+		LLLoadedCallbackEntry *entryp = *iter;
+			
+		// We never finished loading the image.  Indicate failure.
+		// Note: this allows mLoadedCallbackUserData to be cleaned up.
+		entryp->mCallback(FALSE, this, NULL, NULL, 0, TRUE, entryp->mUserData);
+		iter = mLoadedCallbackList.erase(iter) ;
+		delete entryp;
+	}
+	gTextureList.mCallbackList.erase(this);
+		
+	mLoadedCallbackDesiredDiscardLevel = S8_MAX ;
+	if(needsToSaveRawImage())
+	{
+		destroySavedRawImage() ;
+	}
+
+	return ;
+}
+
+void LLViewerFetchedTexture::deleteCallbackEntry(const LLLoadedCallbackEntry::source_callback_list_t* callback_list)
+{
+	if(mLoadedCallbackList.empty() || !callback_list)
+	{
+		return ;
+	}
+
+	S32 desired_discard = S8_MAX ;
+	S32 desired_raw_discard = INVALID_DISCARD_LEVEL ;
+	for(callback_list_t::iterator iter = mLoadedCallbackList.begin();
+			iter != mLoadedCallbackList.end(); )
+	{
+		LLLoadedCallbackEntry *entryp = *iter;
+		if(entryp->mSourceCallbackList == callback_list)
+		{
+			// We never finished loading the image.  Indicate failure.
+			// Note: this allows mLoadedCallbackUserData to be cleaned up.
+			entryp->mCallback(FALSE, this, NULL, NULL, 0, TRUE, entryp->mUserData);
+			iter = mLoadedCallbackList.erase(iter) ;
+			delete entryp;
+		}
+		else
+		{
+			++iter;
+
+			desired_discard = llmin(desired_discard, entryp->mDesiredDiscard) ;
+			if(entryp->mNeedsImageRaw)
+			{
+				desired_raw_discard = llmin(desired_raw_discard, entryp->mDesiredDiscard) ;
+			}
+		}
+	}
+
+	mLoadedCallbackDesiredDiscardLevel = desired_discard;
+	if (mLoadedCallbackList.empty())
+	{
+		// If we have no callbacks, take us off of the image callback list.
+		gTextureList.mCallbackList.erase(this);
+		
+		if(needsToSaveRawImage())
+		{
+			destroySavedRawImage() ;
+		}
+	}
+	else if(needsToSaveRawImage() && mBoostLevel != LLViewerTexture::BOOST_PREVIEW)
+	{
+		if(desired_raw_discard != INVALID_DISCARD_LEVEL)
+		{
+			mDesiredSavedRawDiscardLevel = desired_raw_discard ;
+		}
+		else
+		{
+			destroySavedRawImage() ;
+		}
+	}
+}
+
+void LLViewerFetchedTexture::unpauseLoadedCallbacks(const LLLoadedCallbackEntry::source_callback_list_t* callback_list)
+{
+	if(!callback_list)
+{
+		mPauseLoadedCallBacks = FALSE ;
+		return ;
+	}
+
+	BOOL need_raw = FALSE ;
+	for(callback_list_t::iterator iter = mLoadedCallbackList.begin();
+			iter != mLoadedCallbackList.end(); )
+	{
+		LLLoadedCallbackEntry *entryp = *iter++;
+		if(entryp->mSourceCallbackList == callback_list)
+		{
+			entryp->mPaused = FALSE ;
+			if(entryp->mNeedsImageRaw)
+			{
+				need_raw = TRUE ;
+			}
+		}
+	}
+	mPauseLoadedCallBacks = FALSE ;
+	if(need_raw)
+	{
+		mSaveRawImage = TRUE ;
+	}
+}
+
+void LLViewerFetchedTexture::pauseLoadedCallbacks(const LLLoadedCallbackEntry::source_callback_list_t* callback_list)
+{
+	if(!callback_list)
+{
+		return ;
+	}
+
+	bool paused = true ;
+
+	for(callback_list_t::iterator iter = mLoadedCallbackList.begin();
+			iter != mLoadedCallbackList.end(); )
+	{
+		LLLoadedCallbackEntry *entryp = *iter++;
+		if(entryp->mSourceCallbackList == callback_list)
+		{
+			entryp->mPaused = TRUE ;
+		}
+		else if(!entryp->mPaused)
+		{
+			paused = false ;
+		}
+	}
+
+	if(paused)
+	{
+		mPauseLoadedCallBacks = TRUE ;//when set, loaded callback is paused.
+		resetTextureStats();
+		mSaveRawImage = FALSE ;
+	}
 }
 
 bool LLViewerFetchedTexture::doLoadedCallbacks()
 {
+	static const F32 MAX_INACTIVE_TIME = 120.f ; //seconds
+
 	if (mNeedsCreateTexture)
 	{
 		return false;
 	}
+	if(sCurrentTime - mLastCallBackActiveTime > MAX_INACTIVE_TIME)
+	{
+		clearCallbackEntryList() ; //remove all callbacks.
+		return false ;
+	}
 
 	bool res = false;
 	
@@ -2012,6 +2283,11 @@ bool LLViewerFetchedTexture::doLoadedCallbacks()
 		// Remove ourself from the global list of textures with callbacks
 		gTextureList.mCallbackList.erase(this);
 	}
+	if(mPauseLoadedCallBacks)
+	{
+		destroyRawImage();
+		return res; //paused
+	}
 
 	S32 gl_discard = getDiscardLevel();
 
@@ -2057,6 +2333,7 @@ bool LLViewerFetchedTexture::doLoadedCallbacks()
 		iter != mLoadedCallbackList.end(); )
 	{
 		LLLoadedCallbackEntry *entryp = *iter++;
+	
 		if (entryp->mNeedsImageRaw)
 		{
 			if (mNeedsAux)
@@ -2130,7 +2407,8 @@ bool LLViewerFetchedTexture::doLoadedCallbacks()
 				// to satisfy the interested party, then this is the last time that
 				// we're going to call them.
 
-				llassert_always(mRawImage.notNull());
+				mLastCallBackActiveTime = sCurrentTime ;
+				//llassert_always(mRawImage.notNull());
 				if(mNeedsAux && mAuxRawImage.isNull())
 				{
 					llwarns << "Raw Image with no Aux Data for callback" << llendl;
@@ -2138,10 +2416,6 @@ bool LLViewerFetchedTexture::doLoadedCallbacks()
 				BOOL final = mRawDiscardLevel <= entryp->mDesiredDiscard ? TRUE : FALSE;
 				//llinfos << "Running callback for " << getID() << llendl;
 				//llinfos << mRawImage->getWidth() << "x" << mRawImage->getHeight() << llendl;
-				if (final)
-				{
-					//llinfos << "Final!" << llendl;
-				}
 				entryp->mLastUsedDiscard = mRawDiscardLevel;
 				entryp->mCallback(TRUE, this, mRawImage, mAuxRawImage, mRawDiscardLevel, final, entryp->mUserData);
 				if (final)
@@ -2169,6 +2443,7 @@ bool LLViewerFetchedTexture::doLoadedCallbacks()
 			LLLoadedCallbackEntry *entryp = *curiter;
 			if (!entryp->mNeedsImageRaw && (entryp->mLastUsedDiscard > gl_discard))
 			{
+				mLastCallBackActiveTime = sCurrentTime ;
 				BOOL final = gl_discard <= entryp->mDesiredDiscard ? TRUE : FALSE;
 				entryp->mLastUsedDiscard = gl_discard;
 				entryp->mCallback(TRUE, this, NULL, NULL, gl_discard, final, entryp->mUserData);
@@ -2267,6 +2542,11 @@ LLImageRaw* LLViewerFetchedTexture::reloadRawImage(S8 discard_level)
 	return mRawImage;
 }
 
+bool LLViewerFetchedTexture::needsToSaveRawImage()
+{
+	return mForceToSaveRawImage || mSaveRawImage ;
+}
+
 void LLViewerFetchedTexture::destroyRawImage()
 {	
 	if (mAuxRawImage.notNull()) sAuxCount--;
@@ -2277,7 +2557,7 @@ void LLViewerFetchedTexture::destroyRawImage()
 
 		if(mIsRawImageValid)
 		{
-			if(mForceToSaveRawImage)
+			if(needsToSaveRawImage())
 			{
 				saveRawImage() ;
 			}		
@@ -2409,7 +2689,7 @@ void LLViewerFetchedTexture::saveRawImage()
 	mSavedRawDiscardLevel = mRawDiscardLevel ;
 	mSavedRawImage = new LLImageRaw(mRawImage->getData(), mRawImage->getWidth(), mRawImage->getHeight(), mRawImage->getComponents()) ;
 
-	if(mSavedRawDiscardLevel <= mDesiredSavedRawDiscardLevel)
+	if(mForceToSaveRawImage && mSavedRawDiscardLevel <= mDesiredSavedRawDiscardLevel)
 	{
 		mForceToSaveRawImage = FALSE ;
 	}
@@ -2417,8 +2697,16 @@ void LLViewerFetchedTexture::saveRawImage()
 	mLastReferencedSavedRawImageTime = sCurrentTime ;
 }
 
-void LLViewerFetchedTexture::forceToSaveRawImage(S32 desired_discard) 
+void LLViewerFetchedTexture::forceToSaveRawImage(S32 desired_discard, F32 kept_time) 
 { 
+	mKeptSavedRawImageTime = kept_time ;
+	mLastReferencedSavedRawImageTime = sCurrentTime ;
+
+	if(mSavedRawDiscardLevel > -1 && mSavedRawDiscardLevel <= desired_discard)
+	{
+		return ; //raw imge is ready.
+	}
+
 	if(!mForceToSaveRawImage || mDesiredSavedRawDiscardLevel < 0 || mDesiredSavedRawDiscardLevel > desired_discard)
 	{
 		mForceToSaveRawImage = TRUE ;
@@ -2434,16 +2722,28 @@ void LLViewerFetchedTexture::forceToSaveRawImage(S32 desired_discard)
 
 			mRawImage = NULL ;
 			mRawDiscardLevel = INVALID_DISCARD_LEVEL ;
-		}
+		}		
 	}
 }
 void LLViewerFetchedTexture::destroySavedRawImage()
 {
+	if(mLastReferencedSavedRawImageTime < mKeptSavedRawImageTime)
+	{
+		return ; //keep the saved raw image.
+	}
+
+	mForceToSaveRawImage  = FALSE ;
+	mSaveRawImage = FALSE ;
+
+	clearCallbackEntryList() ;
+	
 	mSavedRawImage = NULL ;
 	mForceToSaveRawImage  = FALSE ;
+	mSaveRawImage = FALSE ;
 	mSavedRawDiscardLevel = -1 ;
 	mDesiredSavedRawDiscardLevel = -1 ;
 	mLastReferencedSavedRawImageTime = 0.0f ;
+	mKeptSavedRawImageTime = 0.f ;
 }
 
 LLImageRaw* LLViewerFetchedTexture::getSavedRawImage() 
@@ -2689,7 +2989,7 @@ BOOL LLViewerLODTexture::isUpdateFrozen()
 void LLViewerLODTexture::processTextureStats()
 {
 	updateVirtualSize() ;
-
+	
 	static LLCachedControl<bool> textures_fullres(gSavedSettings,"TextureLoadFullRes");
 	
 	if (textures_fullres)
@@ -2717,10 +3017,6 @@ void LLViewerLODTexture::processTextureStats()
 		//static const F64 log_2 = log(2.0);
 		static const F64 log_4 = log(4.0);
 
-		S32 fullwidth = llmin(mFullWidth,(S32)MAX_IMAGE_SIZE_DEFAULT);
-		S32 fullheight = llmin(mFullHeight,(S32)MAX_IMAGE_SIZE_DEFAULT);
-		mTexelsPerImage = (F32)fullwidth * fullheight;
-
 		F32 discard_level = 0.f;
 
 		// If we know the output width and height, we can force the discard
@@ -2813,9 +3109,10 @@ void LLViewerLODTexture::scaleDown()
 	{		
 		switchToCachedImage() ;	
 
-		if(LLViewerTextureManager::sTesterp)
+		LLTexturePipelineTester* tester = (LLTexturePipelineTester*)LLMetricPerformanceTesterBasic::getTester(sTesterName);
+		if (tester)
 		{
-			LLViewerTextureManager::sTesterp->setStablizingTime() ;
+			tester->setStablizingTime() ;
 		}
 	}
 }
@@ -2867,7 +3164,7 @@ void LLViewerMediaTexture::removeMediaImplFromTexture(const LLUUID& media_id)
 }
 
 //static
-void LLViewerMediaTexture::cleanup()
+void LLViewerMediaTexture::cleanUpClass()
 {
 	sMediaMap.clear() ;
 }
@@ -3276,7 +3573,7 @@ F32 LLViewerMediaTexture::getMaxVirtualSize()
 	}
 	mUpdateVirtualSizeTime = LLFrameTimer::getFrameCount() ;
 
-	if(mNeedsResetMaxVirtualSize)
+	if(!mMaxVirtualSizeResetCounter)
 	{
 		addTextureStats(0.f, FALSE) ;//reset
 	}
@@ -3309,9 +3606,9 @@ F32 LLViewerMediaTexture::getMaxVirtualSize()
 		}
 	}
 
-	if(mCanResetMaxVirtualSize)
+	if(mMaxVirtualSizeResetCounter > 0)
 	{
-		mNeedsResetMaxVirtualSize = TRUE ;
+		mMaxVirtualSizeResetCounter--;
 	}
 	reorganizeFaceList() ;
 	reorganizeVolumeList();
@@ -3325,23 +3622,22 @@ F32 LLViewerMediaTexture::getMaxVirtualSize()
 //----------------------------------------------------------------------------------------------
 //start of LLTexturePipelineTester
 //----------------------------------------------------------------------------------------------
-LLTexturePipelineTester::LLTexturePipelineTester() :
-	LLMetricPerformanceTester("TextureTester", FALSE) 
-{
-	addMetricString("TotalBytesLoaded") ;
-	addMetricString("TotalBytesLoadedFromCache") ;
-	addMetricString("TotalBytesLoadedForLargeImage") ;
-	addMetricString("TotalBytesLoadedForSculpties") ;
-	addMetricString("StartFetchingTime") ;
-	addMetricString("TotalGrayTime") ;
-	addMetricString("TotalStablizingTime") ;
-	addMetricString("StartTimeLoadingSculpties") ;
-	addMetricString("EndTimeLoadingSculpties") ;
-
-	addMetricString("Time") ;
-	addMetricString("TotalBytesBound") ;
-	addMetricString("TotalBytesBoundForLargeImage") ;
-	addMetricString("PercentageBytesBound") ;
+LLTexturePipelineTester::LLTexturePipelineTester() : LLMetricPerformanceTesterWithSession(sTesterName) 
+{
+	addMetric("TotalBytesLoaded") ;
+	addMetric("TotalBytesLoadedFromCache") ;
+	addMetric("TotalBytesLoadedForLargeImage") ;
+	addMetric("TotalBytesLoadedForSculpties") ;
+	addMetric("StartFetchingTime") ;
+	addMetric("TotalGrayTime") ;
+	addMetric("TotalStablizingTime") ;
+	addMetric("StartTimeLoadingSculpties") ;
+	addMetric("EndTimeLoadingSculpties") ;
+
+	addMetric("Time") ;
+	addMetric("TotalBytesBound") ;
+	addMetric("TotalBytesBoundForLargeImage") ;
+	addMetric("PercentageBytesBound") ;
 	
 	mTotalBytesLoaded = 0 ;
 	mTotalBytesLoadedFromCache = 0 ;	
@@ -3353,7 +3649,7 @@ LLTexturePipelineTester::LLTexturePipelineTester() :
 
 LLTexturePipelineTester::~LLTexturePipelineTester()
 {
-	LLViewerTextureManager::sTesterp = NULL ;
+	LLViewerTextureManager::sTesterp = NULL;
 }
 
 void LLTexturePipelineTester::update()
@@ -3419,22 +3715,23 @@ void LLTexturePipelineTester::reset()
 //virtual 
 void LLTexturePipelineTester::outputTestRecord(LLSD *sd) 
 {	
-	(*sd)[mCurLabel]["TotalBytesLoaded"]              = (LLSD::Integer)mTotalBytesLoaded ;
-	(*sd)[mCurLabel]["TotalBytesLoadedFromCache"]     = (LLSD::Integer)mTotalBytesLoadedFromCache ;
-	(*sd)[mCurLabel]["TotalBytesLoadedForLargeImage"] = (LLSD::Integer)mTotalBytesLoadedForLargeImage ;
-	(*sd)[mCurLabel]["TotalBytesLoadedForSculpties"]  = (LLSD::Integer)mTotalBytesLoadedForSculpties ;
+	std::string currentLabel = getCurrentLabelName();
+	(*sd)[currentLabel]["TotalBytesLoaded"]              = (LLSD::Integer)mTotalBytesLoaded ;
+	(*sd)[currentLabel]["TotalBytesLoadedFromCache"]     = (LLSD::Integer)mTotalBytesLoadedFromCache ;
+	(*sd)[currentLabel]["TotalBytesLoadedForLargeImage"] = (LLSD::Integer)mTotalBytesLoadedForLargeImage ;
+	(*sd)[currentLabel]["TotalBytesLoadedForSculpties"]  = (LLSD::Integer)mTotalBytesLoadedForSculpties ;
 
-	(*sd)[mCurLabel]["StartFetchingTime"]             = (LLSD::Real)mStartFetchingTime ;
-	(*sd)[mCurLabel]["TotalGrayTime"]                 = (LLSD::Real)mTotalGrayTime ;
-	(*sd)[mCurLabel]["TotalStablizingTime"]           = (LLSD::Real)mTotalStablizingTime ;
+	(*sd)[currentLabel]["StartFetchingTime"]             = (LLSD::Real)mStartFetchingTime ;
+	(*sd)[currentLabel]["TotalGrayTime"]                 = (LLSD::Real)mTotalGrayTime ;
+	(*sd)[currentLabel]["TotalStablizingTime"]           = (LLSD::Real)mTotalStablizingTime ;
 
-	(*sd)[mCurLabel]["StartTimeLoadingSculpties"]     = (LLSD::Real)mStartTimeLoadingSculpties ;
-	(*sd)[mCurLabel]["EndTimeLoadingSculpties"]       = (LLSD::Real)mEndTimeLoadingSculpties ;
+	(*sd)[currentLabel]["StartTimeLoadingSculpties"]     = (LLSD::Real)mStartTimeLoadingSculpties ;
+	(*sd)[currentLabel]["EndTimeLoadingSculpties"]       = (LLSD::Real)mEndTimeLoadingSculpties ;
 
-	(*sd)[mCurLabel]["Time"]                          = LLImageGL::sLastFrameTime ;
-	(*sd)[mCurLabel]["TotalBytesBound"]               = (LLSD::Integer)mLastTotalBytesUsed ;
-	(*sd)[mCurLabel]["TotalBytesBoundForLargeImage"]  = (LLSD::Integer)mLastTotalBytesUsedForLargeImage ;
-	(*sd)[mCurLabel]["PercentageBytesBound"]          = (LLSD::Real)(100.f * mLastTotalBytesUsed / mTotalBytesLoaded) ;
+	(*sd)[currentLabel]["Time"]                          = LLImageGL::sLastFrameTime ;
+	(*sd)[currentLabel]["TotalBytesBound"]               = (LLSD::Integer)mLastTotalBytesUsed ;
+	(*sd)[currentLabel]["TotalBytesBoundForLargeImage"]  = (LLSD::Integer)mLastTotalBytesUsedForLargeImage ;
+	(*sd)[currentLabel]["PercentageBytesBound"]          = (LLSD::Real)(100.f * mLastTotalBytesUsed / mTotalBytesLoaded) ;
 }
 
 void LLTexturePipelineTester::updateTextureBindingStats(const LLViewerTexture* imagep) 
@@ -3495,7 +3792,7 @@ void LLTexturePipelineTester::updateStablizingTime()
 	{
 		F32 t = mEndStablizingTime - mStartStablizingTime ;
 
-		if(t > 0.0001f && (t - mTotalStablizingTime) < 0.0001f)
+		if(t > F_ALMOST_ZERO && (t - mTotalStablizingTime) < F_ALMOST_ZERO)
 		{
 			//already stablized
 			mTotalStablizingTime = LLImageGL::sLastFrameTime - mStartStablizingTime ;
@@ -3523,7 +3820,7 @@ void LLTexturePipelineTester::compareTestSessions(std::ofstream* os)
 	}
 
 	//compare and output the comparison
-	*os << llformat("%s\n", mName.c_str()) ;
+	*os << llformat("%s\n", getTesterName().c_str()) ;
 	*os << llformat("AggregateResults\n") ;
 
 	compareTestResults(os, "TotalFetchingTime", base_sessionp->mTotalFetchingTime, current_sessionp->mTotalFetchingTime) ;
@@ -3578,7 +3875,7 @@ void LLTexturePipelineTester::compareTestSessions(std::ofstream* os)
 }
 
 //virtual 
-LLMetricPerformanceTester::LLTestSession* LLTexturePipelineTester::loadTestSession(LLSD* log)
+LLMetricPerformanceTesterWithSession::LLTestSession* LLTexturePipelineTester::loadTestSession(LLSD* log)
 {
 	LLTexturePipelineTester::LLTextureTestSession* sessionp = new LLTexturePipelineTester::LLTextureTestSession() ;
 	if(!sessionp)
@@ -3605,12 +3902,11 @@ LLMetricPerformanceTester::LLTestSession* LLTexturePipelineTester::loadTestSessi
 	sessionp->mInstantPerformanceList[sessionp->mInstantPerformanceListCounter].mTime = 0.f ;
 	
 	//load a session
-	BOOL in_log = (*log).has(mCurLabel) ;
-	while(in_log)
+	std::string currentLabel = getCurrentLabelName();
+	BOOL in_log = (*log).has(currentLabel) ;
+	while (in_log)
 	{
-		LLSD::String label = mCurLabel ;		
-		incLabel() ;
-		in_log = (*log).has(mCurLabel) ;
+		LLSD::String label = currentLabel ;		
 
 		if(sessionp->mInstantPerformanceListCounter >= (S32)sessionp->mInstantPerformanceList.size())
 		{
@@ -3620,7 +3916,7 @@ LLMetricPerformanceTester::LLTestSession* LLTexturePipelineTester::loadTestSessi
 		//time
 		F32 start_time = (*log)[label]["StartFetchingTime"].asReal() ;
 		F32 cur_time   = (*log)[label]["Time"].asReal() ;
-		if(start_time - start_fetching_time > 0.0001f) //fetching has paused for a while
+		if(start_time - start_fetching_time > F_ALMOST_ZERO) //fetching has paused for a while
 		{
 			sessionp->mTotalFetchingTime += total_fetching_time ;
 			sessionp->mTotalGrayTime += total_gray_time ;
@@ -3676,7 +3972,11 @@ LLMetricPerformanceTester::LLTestSession* LLTexturePipelineTester::loadTestSessi
 			sessionp->mInstantPerformanceList[sessionp->mInstantPerformanceListCounter].mAverageBytesUsedForLargeImagePerSecond = 0 ;
 			sessionp->mInstantPerformanceList[sessionp->mInstantPerformanceListCounter].mAveragePercentageBytesUsedPerSecond = 0.f ;
 			sessionp->mInstantPerformanceList[sessionp->mInstantPerformanceListCounter].mTime = 0.f ;
-		}		
+		}
+		// Next label
+		incrementCurrentCount() ;
+		currentLabel = getCurrentLabelName();
+		in_log = (*log).has(currentLabel) ;
 	}
 
 	sessionp->mTotalFetchingTime += total_fetching_time ;