Merge pull from lindenlab/viewer-development as requested by Oz for DRTVWR-148

1 files changed, 726 insertions, 5 deletions

diff --git a/indra/newview/lltexturefetch.cpp b/indra/newview/lltexturefetch.cpp
index f18aa8b4e6..e2af497a7d 100644
--- a/indra/newview/lltexturefetch.cpp
+++ b/indra/newview/lltexturefetch.cpp
@@ -52,12 +52,20 @@
 #include "llviewerstats.h"
 #include "llviewerassetstats.h"
 #include "llworld.h"
+#include "llsdutil.h"
+#include "llstartup.h"
+#include "llviewerstats.h"
+
+bool LLTextureFetchDebugger::sDebuggerEnabled = false ;
+LLStat LLTextureFetch::sCacheHitRate("texture_cache_hits", 128);
+LLStat LLTextureFetch::sCacheReadLatency("texture_cache_read_latency", 128);
 
 //////////////////////////////////////////////////////////////////////////////
 class LLTextureFetchWorker : public LLWorkerClass
 {
 	friend class LLTextureFetch;
 	friend class HTTPGetResponder;
+	friend class LLTextureFetchDebugger;
 	
 private:
 	class CacheReadResponder : public LLTextureCache::ReadResponder
@@ -242,6 +250,8 @@ private:
 	S32 mDecodedDiscard;
 	LLFrameTimer mRequestedTimer;
 	LLFrameTimer mFetchTimer;
+	LLTimer			mCacheReadTimer;
+	F32				mCacheReadTime;
 	LLTextureCache::handle_t mCacheReadHandle;
 	LLTextureCache::handle_t mCacheWriteHandle;
 	U8* mBuffer;
@@ -258,6 +268,7 @@ private:
 	BOOL mNeedsAux;
 	BOOL mHaveAllData;
 	BOOL mInLocalCache;
+	BOOL mInCache;
 	bool mCanUseHTTP ;
 	bool mCanUseNET ; //can get from asset server.
 	S32 mHTTPFailCount;
@@ -653,6 +664,7 @@ LLTextureFetchWorker::LLTextureFetchWorker(LLTextureFetch* fetcher,
 	  mRequestedDiscard(-1),
 	  mLoadedDiscard(-1),
 	  mDecodedDiscard(-1),
+	  mCacheReadTime(0.f),
 	  mCacheReadHandle(LLTextureCache::nullHandle()),
 	  mCacheWriteHandle(LLTextureCache::nullHandle()),
 	  mBuffer(NULL),
@@ -669,6 +681,7 @@ LLTextureFetchWorker::LLTextureFetchWorker(LLTextureFetch* fetcher,
 	  mNeedsAux(FALSE),
 	  mHaveAllData(FALSE),
 	  mInLocalCache(FALSE),
+	  mInCache(FALSE),
 	  mCanUseHTTP(true),
 	  mHTTPFailCount(0),
 	  mRetryAttempt(0),
@@ -838,6 +851,8 @@ void LLTextureFetchWorker::startWork(S32 param)
 // Called from LLWorkerThread::processRequest()
 bool LLTextureFetchWorker::doWork(S32 param)
 {
+	static const F32 FETCHING_TIMEOUT = 120.f;//seconds
+
 	LLMutexLock lock(&mWorkMutex);
 
 	if ((mFetcher->isQuitting() || getFlags(LLWorkerClass::WCF_DELETE_REQUESTED)))
@@ -896,6 +911,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		mCacheReadHandle = LLTextureCache::nullHandle();
 		mCacheWriteHandle = LLTextureCache::nullHandle();
 		mState = LOAD_FROM_TEXTURE_CACHE;
+		mInCache = FALSE;
 		mDesiredSize = llmax(mDesiredSize, TEXTURE_CACHE_ENTRY_SIZE); // min desired size is TEXTURE_CACHE_ENTRY_SIZE
 		LL_DEBUGS("Texture") << mID << ": Priority: " << llformat("%8.0f",mImagePriority)
 							 << " Desired Discard: " << mDesiredDiscard << " Desired Size: " << mDesiredSize << LL_ENDL;
@@ -926,6 +942,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 				CacheReadResponder* responder = new CacheReadResponder(mFetcher, mID, mFormattedImage);
 				mCacheReadHandle = mFetcher->mTextureCache->readFromCache(filename, mID, cache_priority,
 																		  offset, size, responder);
+				mCacheReadTimer.reset();
 			}
 			else if (mUrl.empty())
 			{
@@ -934,6 +951,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 				CacheReadResponder* responder = new CacheReadResponder(mFetcher, mID, mFormattedImage);
 				mCacheReadHandle = mFetcher->mTextureCache->readFromCache(mID, cache_priority,
 																		  offset, size, responder);
+				mCacheReadTimer.reset();
 			}
 			else if(mCanUseHTTP)
 			{
@@ -982,11 +1000,12 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			llassert_always(mFormattedImage->getDataSize() > 0);
 			mLoadedDiscard = mDesiredDiscard;
 			mState = DECODE_IMAGE;
+			mInCache = TRUE;
 			mWriteToCacheState = NOT_WRITE ;
 			LL_DEBUGS("Texture") << mID << ": Cached. Bytes: " << mFormattedImage->getDataSize()
 								 << " Size: " << llformat("%dx%d",mFormattedImage->getWidth(),mFormattedImage->getHeight())
 								 << " Desired Discard: " << mDesiredDiscard << " Desired Size: " << mDesiredSize << LL_ENDL;
-			// fall through
+			LLTextureFetch::sCacheHitRate.addValue(100.f);
 		}
 		else
 		{
@@ -1002,6 +1021,7 @@ bool LLTextureFetchWorker::doWork(S32 param)
 				mState = LOAD_FROM_NETWORK;
 			}
 			// fall through
+			LLTextureFetch::sCacheHitRate.addValue(0.f);
 		}
 	}
 
@@ -1177,6 +1197,8 @@ bool LLTextureFetchWorker::doWork(S32 param)
 			bool res = false;
 			if (!mUrl.empty())
 			{
+				mRequestedTimer.reset();
+
 				mLoaded = FALSE;
 				mGetStatus = 0;
 				mGetReason.clear();
@@ -1335,6 +1357,13 @@ bool LLTextureFetchWorker::doWork(S32 param)
 		}
 		else
 		{
+			if(FETCHING_TIMEOUT < mRequestedTimer.getElapsedTimeF32())
+			{
+				//timeout, abort.
+				mState = DONE;
+				return true;
+			}
+
 			setPriority(LLWorkerThread::PRIORITY_LOW | mWorkPriority);
 			return false;
 		}
@@ -1396,6 +1425,11 @@ bool LLTextureFetchWorker::doWork(S32 param)
 	{
 		if (mDecoded)
 		{
+			if(mFetcher->getFetchDebugger() && !mInLocalCache)
+			{
+				mFetcher->getFetchDebugger()->addHistoryEntry(this);
+			}
+
 			if (mDecodedDiscard < 0)
 			{
 				LL_DEBUGS("Texture") << mID << ": Failed to Decode." << LL_ENDL;
@@ -1780,6 +1814,7 @@ void LLTextureFetchWorker::callbackDecoded(bool success, LLImageRaw* raw, LLImag
 	mDecoded = TRUE;
 // 	llinfos << mID << " : DECODE COMPLETE " << llendl;
 	setPriority(LLWorkerThread::PRIORITY_HIGH | mWorkPriority);
+	mCacheReadTime = mCacheReadTimer.getElapsedTimeF32();
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ -1824,11 +1859,18 @@ LLTextureFetch::LLTextureFetch(LLTextureCache* cache, LLImageDecodeThread* image
 	  mHTTPTextureBits(0),
 	  mTotalHTTPRequests(0),
 	  mCurlGetRequest(NULL),
-	  mQAMode(qa_mode)
+	  mQAMode(qa_mode),
+	  mFetchDebugger(NULL)
 {
 	mCurlPOSTRequestCount = 0;
 	mMaxBandwidth = gSavedSettings.getF32("ThrottleBandwidthKBPS");
 	mTextureInfo.setUpLogging(gSavedSettings.getBOOL("LogTextureDownloadsToViewerLog"), gSavedSettings.getBOOL("LogTextureDownloadsToSimulator"), gSavedSettings.getU32("TextureLoggingThreshold"));
+
+	LLTextureFetchDebugger::sDebuggerEnabled = gSavedSettings.getBOOL("TextureFetchDebuggerEnabled");
+	if(LLTextureFetchDebugger::isEnabled())
+	{
+		mFetchDebugger = new LLTextureFetchDebugger(this, cache, imagedecodethread) ;
+	}
 }
 
 LLTextureFetch::~LLTextureFetch()
@@ -1843,11 +1885,17 @@ LLTextureFetch::~LLTextureFetch()
 	}
 	
 	// ~LLQueuedThread() called here
+
+	delete mFetchDebugger;
 }
 
 bool LLTextureFetch::createRequest(const std::string& url, const LLUUID& id, const LLHost& host, F32 priority,
 								   S32 w, S32 h, S32 c, S32 desired_discard, bool needs_aux, bool can_use_http)
 {
+	if(mFetcherLocked)
+	{
+		return false;
+	}
 	if (mDebugPause)
 	{
 		return false;
@@ -2092,6 +2140,11 @@ bool LLTextureFetch::getRequestFinished(const LLUUID& id, S32& discard_level,
 			discard_level = worker->mDecodedDiscard;
 			raw = worker->mRawImage;
 			aux = worker->mAuxImage;
+			F32 cache_read_time = worker->mCacheReadTime;
+			if (cache_read_time != 0.f)
+			{
+				sCacheReadLatency.addValue(cache_read_time * 1000.f);
+			}
 			res = true;
 			LL_DEBUGS("Texture") << id << ": Request Finished. State: " << worker->mState << " Discard: " << discard_level << LL_ENDL;
 			worker->unlockWorkMutex();
@@ -2222,7 +2275,13 @@ S32 LLTextureFetch::update(F32 max_time_ms)
 	
 	if (!mDebugPause)
 	{
-		sendRequestListToSimulators();
+		// this is the startup state when send_complete_agent_movement() message is sent.
+		// Before this, the RequestImages message sent by sendRequestListToSimulators 
+		// won't work so don't bother trying
+		if (LLStartUp::getStartupState() > STATE_AGENT_SEND)
+		{
+			sendRequestListToSimulators();
+		}
 	}
 
 	if (!mThreaded)
@@ -2258,6 +2317,11 @@ void LLTextureFetch::startThread()
 {
 	// Construct mCurlGetRequest from Worker Thread
 	mCurlGetRequest = new LLCurlRequest();
+	
+	if(mFetchDebugger)
+	{
+		mFetchDebugger->setCurlGetRequest(mCurlGetRequest);
+	}
 }
 
 // WORKER THREAD
@@ -2266,6 +2330,10 @@ void LLTextureFetch::endThread()
 	// Destroy mCurlGetRequest from Worker Thread
 	delete mCurlGetRequest;
 	mCurlGetRequest = NULL;
+	if(mFetchDebugger)
+	{
+		mFetchDebugger->setCurlGetRequest(NULL);
+	}
 }
 
 // WORKER THREAD
@@ -2803,7 +2871,6 @@ void LLTextureFetch::cmdDoWork()
 	}
 }
 
-
 //////////////////////////////////////////////////////////////////////////////
 
 // Private (anonymous) class methods implementing the command scheme.
@@ -2959,7 +3026,7 @@ TFReqSendMetrics::doWork(LLTextureFetch * fetcher)
 	// In QA mode, Metrics submode, log the result for ease of testing
 	if (fetcher->isQAMode())
 	{
-		LL_INFOS("Textures") << merged_llsd << LL_ENDL;
+		LL_INFOS("Textures") << ll_pretty_print_sd(merged_llsd) << LL_ENDL;
 	}
 
 	gViewerAssetStatsThread1->reset();
@@ -3007,5 +3074,659 @@ truncate_viewer_metrics(int max_regions, LLSD & metrics)
 
 } // end of anonymous namespace
 
+///////////////////////////////////////////////////////////////////////////////////////////
+//Start LLTextureFetchDebugger
+///////////////////////////////////////////////////////////////////////////////////////////
+//---------------------
+class LLDebuggerCacheReadResponder : public LLTextureCache::ReadResponder
+{
+public:
+	LLDebuggerCacheReadResponder(LLTextureFetchDebugger* debugger, S32 id, LLImageFormatted* image)
+		: mDebugger(debugger), mID(id)
+	{
+		setImage(image);
+	}
+	virtual void completed(bool success)
+	{
+		mDebugger->callbackCacheRead(mID, success, mFormattedImage, mImageSize, mImageLocal);
+	}
+private:
+	LLTextureFetchDebugger* mDebugger;
+	S32 mID;
+};
+
+class LLDebuggerCacheWriteResponder : public LLTextureCache::WriteResponder
+{
+public:
+	LLDebuggerCacheWriteResponder(LLTextureFetchDebugger* debugger, S32 id)
+		: mDebugger(debugger), mID(id)
+	{
+	}
+	virtual void completed(bool success)
+	{
+		mDebugger->callbackCacheWrite(mID, success);
+	}
+private:
+	LLTextureFetchDebugger* mDebugger;
+	S32 mID;
+};
+
+class LLDebuggerDecodeResponder : public LLImageDecodeThread::Responder
+{
+public:
+	LLDebuggerDecodeResponder(LLTextureFetchDebugger* debugger, S32 id)
+		: mDebugger(debugger), mID(id)
+	{
+	}
+	virtual void completed(bool success, LLImageRaw* raw, LLImageRaw* aux)
+	{
+		mDebugger->callbackDecoded(mID, success, raw, aux);
+	}
+private:
+	LLTextureFetchDebugger* mDebugger;
+	S32 mID;
+};
+
+class LLDebuggerHTTPResponder : public LLCurl::Responder
+{
+public:
+	LLDebuggerHTTPResponder(LLTextureFetchDebugger* debugger, S32 index)
+	: mDebugger(debugger), mIndex(index)
+	{
+	}
+	virtual void completedRaw(U32 status, const std::string& reason,
+							  const LLChannelDescriptors& channels,
+							  const LLIOPipe::buffer_ptr_t& buffer)
+	{
+		bool success = false;
+		bool partial = false;
+		if (HTTP_OK <= status &&  status < HTTP_MULTIPLE_CHOICES)
+		{
+			success = true;
+			if (HTTP_PARTIAL_CONTENT == status) // partial information
+			{
+				partial = true;
+			}
+		}
+		if (!success)
+		{
+			llinfos << "Fetch Debugger : CURL GET FAILED, index = " << mIndex << ", status:" << status << " reason:" << reason << llendl;
+		}
+		mDebugger->callbackHTTP(mIndex, channels, buffer, partial, success);
+	}
+	virtual bool followRedir()
+	{
+		return true;
+	}
+private:
+	LLTextureFetchDebugger* mDebugger;
+	S32 mIndex;
+};
+
+LLTextureFetchDebugger::LLTextureFetchDebugger(LLTextureFetch* fetcher, LLTextureCache* cache, LLImageDecodeThread* imagedecodethread) :
+	mFetcher(fetcher),
+	mTextureCache(cache),
+	mImageDecodeThread(imagedecodethread),
+	mCurlGetRequest(NULL)
+{
+	init();
+}
+	
+LLTextureFetchDebugger::~LLTextureFetchDebugger()
+{
+	mFetchingHistory.clear();
+	stopDebug();
+}
+
+void LLTextureFetchDebugger::init()
+{
+	mState = IDLE;
+	
+	mCacheReadTime = -1.f;
+	mCacheWriteTime = -1.f;
+	mDecodingTime = -1.f;
+	mHTTPTime = -1.f;
+	mGLCreationTime = -1.f;
+	mTotalFetchingTime = 0.f;
+	mRefetchVisCacheTime = -1.f;
+	mRefetchVisHTTPTime = -1.f;
+
+	mNumFetchedTextures = 0;
+	mNumCacheHits = 0;
+	mNumVisibleFetchedTextures = 0;
+	mNumVisibleFetchingRequests = 0;
+	mFetchedData = 0;
+	mDecodedData = 0;
+	mVisibleFetchedData = 0;
+	mVisibleDecodedData = 0;
+	mRenderedData = 0;
+	mRenderedDecodedData = 0;
+	mFetchedPixels = 0;
+	mRenderedPixels = 0;
+	mRefetchedData = 0;
+	mRefetchedPixels = 0;
+
+	mFreezeHistory = FALSE;
+}
+
+void LLTextureFetchDebugger::startDebug()
+{
+	//lock the fetcher
+	mFetcher->lockFetcher(true);
+	mFreezeHistory = TRUE;
+
+	//clear the current fetching queue
+	gTextureList.clearFetchingRequests();
+
+	//wait for all works to be done
+	while(1)
+	{
+		S32 pending = 0;
+		pending += LLAppViewer::getTextureCache()->update(1); 
+		pending += LLAppViewer::getImageDecodeThread()->update(1); 
+		pending += LLAppViewer::getTextureFetch()->update(1); 
+		if(!pending)
+		{
+			break;
+		}
+	}
+
+	//collect statistics
+	mTotalFetchingTime = gDebugTimers[0].getElapsedTimeF32() - mTotalFetchingTime;
+	
+	std::set<LLUUID> fetched_textures;
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size; i++)
+	{
+		bool in_list = true;
+		if(fetched_textures.find(mFetchingHistory[i].mID) == fetched_textures.end())
+		{
+			fetched_textures.insert(mFetchingHistory[i].mID);
+			in_list = false;
+		}
+		
+		LLViewerFetchedTexture* tex = LLViewerTextureManager::findFetchedTexture(mFetchingHistory[i].mID);
+		if(tex && tex->isJustBound()) //visible
+		{
+			if(!in_list)
+			{
+				mNumVisibleFetchedTextures++;
+			}
+			mNumVisibleFetchingRequests++;
+	
+			mVisibleFetchedData += mFetchingHistory[i].mFetchedSize;
+			mVisibleDecodedData += mFetchingHistory[i].mDecodedSize;
+	
+			if(tex->getDiscardLevel() >= mFetchingHistory[i].mDecodedLevel)
+			{
+				mRenderedData += mFetchingHistory[i].mFetchedSize;
+				mRenderedDecodedData += mFetchingHistory[i].mDecodedSize;
+				mRenderedPixels += tex->getWidth() * tex->getHeight();
+			}
+		}
+	}
+
+	mNumFetchedTextures = fetched_textures.size();
+}
+
+void LLTextureFetchDebugger::stopDebug()
+{
+	//clear the current debug work
+	S32 size = mFetchingHistory.size();
+	switch(mState)
+	{
+	case READ_CACHE:		
+		for(S32 i = 0 ; i < size; i++)
+		{
+			if (mFetchingHistory[i]. mCacheHandle != LLTextureCache::nullHandle())
+			{
+				mTextureCache->readComplete(mFetchingHistory[i].mCacheHandle, true);
+			}
+		}	
+		break;
+	case WRITE_CACHE:
+		for(S32 i = 0 ; i < size; i++)
+		{
+			if (mFetchingHistory[i].mCacheHandle != LLTextureCache::nullHandle())
+			{
+				mTextureCache->writeComplete(mFetchingHistory[i].mCacheHandle, true);
+			}
+		}
+		break;
+	case DECODING:
+		break;
+	case HTTP_FETCHING:
+		break;
+	case GL_TEX:
+		break;
+	default:
+		break;
+	}
+
+	while(1)
+	{
+		if(update())
+		{
+			break;
+		}
+	}
+
+	//unlock the fetcher
+	mFetcher->lockFetcher(false);
+	mFreezeHistory = FALSE;
+	mTotalFetchingTime = gDebugTimers[0].getElapsedTimeF32(); //reset
+}
+
+//called in the main thread and when the fetching queue is empty
+void LLTextureFetchDebugger::clearHistory()
+{
+	mFetchingHistory.clear();
+	init();
+}
+
+void LLTextureFetchDebugger::addHistoryEntry(LLTextureFetchWorker* worker)
+{
+	if(mFreezeHistory)
+	{
+		mRefetchedPixels += worker->mRawImage->getWidth() * worker->mRawImage->getHeight();
+		mRefetchedData += worker->mFormattedImage->getDataSize();
+		return;
+	}
+
+	if(worker->mInCache)
+	{
+		mNumCacheHits++;
+	}
+	mFetchedData += worker->mFormattedImage->getDataSize();
+	mDecodedData += worker->mRawImage->getDataSize();
+	mFetchedPixels += worker->mRawImage->getWidth() * worker->mRawImage->getHeight();
+
+	mFetchingHistory.push_back(FetchEntry(worker->mID, worker->mDesiredSize, worker->mDecodedDiscard, worker->mFormattedImage->getDataSize(), worker->mRawImage->getDataSize()));
+	//mFetchingHistory.push_back(FetchEntry(worker->mID, worker->mDesiredSize, worker->mHaveAllData ? 0 : worker->mLoadedDiscard, worker->mFormattedImage->getComponents(),
+		//worker->mDecodedDiscard, worker->mFormattedImage->getDataSize(), worker->mRawImage->getDataSize()));
+}
+
+void LLTextureFetchDebugger::lockCache()
+{
+}
+	
+void LLTextureFetchDebugger::unlockCache()
+{
+}
+	
+void LLTextureFetchDebugger::debugCacheRead()
+{
+	lockCache();
+	llassert_always(mState == IDLE);
+	mTimer.reset();
+	mState = READ_CACHE;
+
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size ; i++)
+	{		
+		mFetchingHistory[i].mFormattedImage = NULL;
+		mFetchingHistory[i].mCacheHandle = mTextureCache->readFromCache(mFetchingHistory[i].mID, LLWorkerThread::PRIORITY_NORMAL, 0, mFetchingHistory[i].mFetchedSize, 
+			new LLDebuggerCacheReadResponder(this, i, mFetchingHistory[i].mFormattedImage));
+	}
+}
+	
+void LLTextureFetchDebugger::clearCache()
+{
+	S32 size = mFetchingHistory.size();
+	{
+		std::set<LLUUID> deleted_list;
+		for(S32 i = 0 ; i < size ; i++)
+		{
+			if(deleted_list.find(mFetchingHistory[i].mID) == deleted_list.end())
+			{
+				deleted_list.insert(mFetchingHistory[i].mID);
+				mTextureCache->removeFromCache(mFetchingHistory[i].mID);
+			}
+		}
+	}
+}
+
+void LLTextureFetchDebugger::debugCacheWrite()
+{
+	//remove from cache
+	clearCache();
+
+	lockCache();
+	llassert_always(mState == IDLE);
+	mTimer.reset();
+	mState = WRITE_CACHE;
+
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size ; i++)
+	{		
+		if(mFetchingHistory[i].mFormattedImage.notNull())
+		{
+			mFetchingHistory[i].mCacheHandle = mTextureCache->writeToCache(mFetchingHistory[i].mID, LLWorkerThread::PRIORITY_NORMAL, 
+				mFetchingHistory[i].mFormattedImage->getData(), mFetchingHistory[i].mFetchedSize,
+				mFetchingHistory[i].mDecodedLevel == 0 ? mFetchingHistory[i].mFetchedSize : mFetchingHistory[i].mFetchedSize + 1, 
+				new LLDebuggerCacheWriteResponder(this, i));					
+		}
+	}
+}
+
+void LLTextureFetchDebugger::lockDecoder()
+{
+}
+	
+void LLTextureFetchDebugger::unlockDecoder()
+{
+}
+
+void LLTextureFetchDebugger::debugDecoder()
+{
+	lockDecoder();
+	llassert_always(mState == IDLE);
+	mTimer.reset();
+	mState = DECODING;
+
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size ; i++)
+	{		
+		if(mFetchingHistory[i].mFormattedImage.isNull())
+		{
+			continue;
+		}
+
+		mImageDecodeThread->decodeImage(mFetchingHistory[i].mFormattedImage, LLWorkerThread::PRIORITY_NORMAL, 
+			mFetchingHistory[i].mDecodedLevel, mFetchingHistory[i].mNeedsAux,
+			new LLDebuggerDecodeResponder(this, i));
+	}
+}
+
+void LLTextureFetchDebugger::debugHTTP()
+{
+	llassert_always(mState == IDLE);
+
+	LLViewerRegion* region = gAgent.getRegion();
+	if (!region)
+	{
+		llinfos << "Fetch Debugger : Current region undefined. Cannot fetch textures through HTTP." << llendl;
+		return;
+	}
+	
+	mHTTPUrl = region->getHttpUrl();
+	if (mHTTPUrl.empty())
+	{
+		llinfos << "Fetch Debugger : Current region URL undefined. Cannot fetch textures through HTTP." << llendl;
+		return;
+	}
+	
+	mTimer.reset();
+	mState = HTTP_FETCHING;
+	
+	S32 size = mFetchingHistory.size();
+	for (S32 i = 0 ; i < size ; i++)
+	{
+		mFetchingHistory[i].mCurlState = FetchEntry::CURL_NOT_DONE;
+		mFetchingHistory[i].mCurlReceivedSize = 0;
+		mFetchingHistory[i].mHTTPFailCount = 0;
+	}
+	mNbCurlRequests = 0;
+	mNbCurlCompleted = 0;
+	
+	fillCurlQueue();
+}
+
+S32 LLTextureFetchDebugger::fillCurlQueue()
+{
+	if (mNbCurlRequests == 24)
+		return mNbCurlRequests;
+	
+	S32 size = mFetchingHistory.size();
+	for (S32 i = 0 ; i < size ; i++)
+	{		
+		if (mFetchingHistory[i].mCurlState != FetchEntry::CURL_NOT_DONE)
+			continue;
+		std::string texture_url = mHTTPUrl + "/?texture_id=" + mFetchingHistory[i].mID.asString().c_str();
+		S32 requestedSize = mFetchingHistory[i].mRequestedSize;
+		// We request the whole file if the size was not set.
+		requestedSize = llmax(0,requestedSize);
+		// We request the whole file if the size was set to an absurdly high value (meaning all file)
+		requestedSize = (requestedSize == 33554432 ? 0 : requestedSize);
+		std::vector<std::string> headers;
+		headers.push_back("Accept: image/x-j2c");
+		bool res = mCurlGetRequest->getByteRange(texture_url, headers, 0, requestedSize, new LLDebuggerHTTPResponder(this, i));
+		if (res)
+		{
+			mFetchingHistory[i].mCurlState = FetchEntry::CURL_IN_PROGRESS;
+			mNbCurlRequests++;
+			// Hack
+			if (mNbCurlRequests == 24)
+				break;
+		}
+		else 
+		{
+			break;
+		}
+	}
+	//llinfos << "Fetch Debugger : Having " << mNbCurlRequests << " requests through the curl thread." << llendl;
+	return mNbCurlRequests;
+}
+
+void LLTextureFetchDebugger::debugGLTextureCreation()
+{
+	llassert_always(mState == IDLE);
+	mState = GL_TEX;
+	std::vector<LLViewerFetchedTexture*> tex_list;
+
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size ; i++)
+	{
+		if(mFetchingHistory[i].mRawImage.notNull())
+		{
+			LLViewerFetchedTexture* tex = gTextureList.findImage(mFetchingHistory[i].mID) ;
+			if(tex && !tex->isForSculptOnly())
+			{
+				tex->destroyGLTexture() ;
+				tex_list.push_back(tex);
+			}
+		}
+	}
+
+	mTimer.reset();
+	S32 j = 0 ;
+	S32 size1 = tex_list.size();
+	for(S32 i = 0 ; i < size && j < size1; i++)
+	{
+		if(mFetchingHistory[i].mRawImage.notNull())
+		{
+			if(mFetchingHistory[i].mID == tex_list[j]->getID())
+			{
+				tex_list[j]->createGLTexture(mFetchingHistory[i].mDecodedLevel, mFetchingHistory[i].mRawImage, 0, TRUE, tex_list[j]->getBoostLevel());
+				j++;
+			}
+		}
+	}
+
+	mGLCreationTime = mTimer.getElapsedTimeF32() ;
+	return;
+}
+
+//clear fetching results of all textures.
+void LLTextureFetchDebugger::clearTextures()
+{
+	S32 size = mFetchingHistory.size();
+	for(S32 i = 0 ; i < size ; i++)
+	{
+		LLViewerFetchedTexture* tex = gTextureList.findImage(mFetchingHistory[i].mID) ;
+		if(tex)
+		{
+			tex->clearFetchedResults() ;
+		}
+	}
+}
+
+void LLTextureFetchDebugger::debugRefetchVisibleFromCache()
+{
+	llassert_always(mState == IDLE);
+	mState = REFETCH_VIS_CACHE;
+
+	clearTextures();
+
+	mTimer.reset();
+	mFetcher->lockFetcher(false);
+}
+
+void LLTextureFetchDebugger::debugRefetchVisibleFromHTTP()
+{
+	llassert_always(mState == IDLE);
+	mState = REFETCH_VIS_HTTP;
+
+	clearCache();
+	clearTextures();
+
+	mTimer.reset();
+	mFetcher->lockFetcher(false);
+}
+
+bool LLTextureFetchDebugger::update()
+{
+	switch(mState)
+	{
+	case READ_CACHE:
+		if(!mTextureCache->update(1))
+		{
+			mCacheReadTime = mTimer.getElapsedTimeF32() ;
+			mState = IDLE;
+			unlockCache();
+		}
+		break;
+	case WRITE_CACHE:
+		if(!mTextureCache->update(1))
+		{
+			mCacheWriteTime = mTimer.getElapsedTimeF32() ;
+			mState = IDLE;
+			unlockCache();
+		}
+		break;
+	case DECODING:
+		if(!mImageDecodeThread->update(1))
+		{
+			mDecodingTime =  mTimer.getElapsedTimeF32() ;
+			mState = IDLE;
+			unlockDecoder();
+		}
+		break;
+	case HTTP_FETCHING:
+		mCurlGetRequest->process();
+		LLCurl::getCurlThread()->update(1);
+		if (!fillCurlQueue() && mNbCurlCompleted == mFetchingHistory.size())
+		{
+			mHTTPTime =  mTimer.getElapsedTimeF32() ;
+			mState = IDLE;
+		}
+		break;
+	case GL_TEX:
+		mState = IDLE;
+		break;
+	case REFETCH_VIS_CACHE:
+		if (LLAppViewer::getTextureFetch()->getNumRequests() == 0)
+		{
+			mRefetchVisCacheTime = gDebugTimers[0].getElapsedTimeF32() - mTotalFetchingTime;
+			mState = IDLE;
+			mFetcher->lockFetcher(true);
+		}
+		break;
+	case REFETCH_VIS_HTTP:
+		if (LLAppViewer::getTextureFetch()->getNumRequests() == 0)
+		{
+			mRefetchVisHTTPTime = gDebugTimers[0].getElapsedTimeF32() - mTotalFetchingTime;
+			mState = IDLE;
+			mFetcher->lockFetcher(true);
+		}
+		break;
+	default:
+		mState = IDLE;
+		break;
+	}
+
+	return mState == IDLE;
+}
+
+void LLTextureFetchDebugger::callbackCacheRead(S32 id, bool success, LLImageFormatted* image,
+						   S32 imagesize, BOOL islocal)
+{
+	if (success)
+	{
+		mFetchingHistory[id].mFormattedImage = image;
+	}
+	mTextureCache->readComplete(mFetchingHistory[id].mCacheHandle, false);
+	mFetchingHistory[id].mCacheHandle = LLTextureCache::nullHandle();
+}
+
+void LLTextureFetchDebugger::callbackCacheWrite(S32 id, bool success)
+{
+	mTextureCache->writeComplete(mFetchingHistory[id].mCacheHandle);
+	mFetchingHistory[id].mCacheHandle = LLTextureCache::nullHandle();
+}
+
+void LLTextureFetchDebugger::callbackDecoded(S32 id, bool success, LLImageRaw* raw, LLImageRaw* aux)
+{
+	if (success)
+	{
+		llassert_always(raw);
+		mFetchingHistory[id].mRawImage = raw;
+	}
+}
+
+void LLTextureFetchDebugger::callbackHTTP(S32 id, const LLChannelDescriptors& channels,
+										  const LLIOPipe::buffer_ptr_t& buffer, 
+										  bool partial, bool success)
+{
+	mNbCurlRequests--;
+	if (success)
+	{
+		mFetchingHistory[id].mCurlState = FetchEntry::CURL_DONE;
+		mNbCurlCompleted++;
+
+		S32 data_size = buffer->countAfter(channels.in(), NULL);
+		mFetchingHistory[id].mCurlReceivedSize += data_size;
+		//llinfos << "Fetch Debugger : got results for " << id << ", data_size = " << data_size << ", received = " << mFetchingHistory[id].mCurlReceivedSize << ", requested = " << mFetchingHistory[id].mRequestedSize << ", partial = " << partial << llendl;
+		if ((mFetchingHistory[id].mCurlReceivedSize >= mFetchingHistory[id].mRequestedSize) || !partial || (mFetchingHistory[id].mRequestedSize == 600))
+		{
+			U8* d_buffer = (U8*)ALLOCATE_MEM(LLImageBase::getPrivatePool(), data_size);
+			buffer->readAfter(channels.in(), NULL, d_buffer, data_size);
+			
+			llassert_always(mFetchingHistory[id].mFormattedImage.isNull());
+			{
+				// For now, create formatted image based on extension
+				std::string texture_url = mHTTPUrl + "/?texture_id=" + mFetchingHistory[id].mID.asString().c_str();
+				std::string extension = gDirUtilp->getExtension(texture_url);
+				mFetchingHistory[id].mFormattedImage = LLImageFormatted::createFromType(LLImageBase::getCodecFromExtension(extension));
+				if (mFetchingHistory[id].mFormattedImage.isNull())
+				{
+					mFetchingHistory[id].mFormattedImage = new LLImageJ2C; // default
+				}
+			}
+						
+			mFetchingHistory[id].mFormattedImage->setData(d_buffer, data_size);	
+		}
+	}
+	else //failed
+	{
+		mFetchingHistory[id].mHTTPFailCount++;
+		if(mFetchingHistory[id].mHTTPFailCount < 5)
+		{
+			// Fetch will have to be redone
+			mFetchingHistory[id].mCurlState = FetchEntry::CURL_NOT_DONE;
+		}
+		else //skip
+		{
+			mFetchingHistory[id].mCurlState = FetchEntry::CURL_DONE;
+			mNbCurlCompleted++;
+		}
+	}
+}
+
+
+//---------------------
+///////////////////////////////////////////////////////////////////////////////////////////
+//End LLTextureFetchDebugger
+///////////////////////////////////////////////////////////////////////////////////////////