Automated merge with ssh://hg.lindenlab.com/richard/viewer-interesting-metrics

10 files changed, 218 insertions, 51 deletions

diff --git a/indra/llcommon/lltracerecording.h b/indra/llcommon/lltracerecording.h
index f575fbd8b2..05e1577a5a 100644
--- a/indra/llcommon/lltracerecording.h
+++ b/indra/llcommon/lltracerecording.h
@@ -402,6 +402,8 @@ namespace LLTrace
 		/*virtual*/ void reset();
 		/*virtual*/ void splitTo(ExtendableRecording& other);
 		/*virtual*/ void splitFrom(ExtendableRecording& other);
+
+		const Recording& getAcceptedRecording() const {return mAcceptedRecording;}
 	private:
 		Recording mAcceptedRecording;
 		Recording mPotentialRecording;
diff --git a/indra/newview/app_settings/shaders/class1/interface/twotexturecompareF.glsl b/indra/newview/app_settings/shaders/class1/interface/twotexturecompareF.glsl
index 050114b37e..6eeb2596b2 100644
--- a/indra/newview/app_settings/shaders/class1/interface/twotexturecompareF.glsl
+++ b/indra/newview/app_settings/shaders/class1/interface/twotexturecompareF.glsl
@@ -31,6 +31,10 @@ out vec4 frag_color;
 
 uniform sampler2D tex0;
 uniform sampler2D tex1;
+uniform sampler2D dither_tex;
+uniform float dither_scale;
+uniform float dither_scale_s;
+uniform float dither_scale_t;
 
 VARYING vec2 vary_texcoord0;
 VARYING vec2 vary_texcoord1;
@@ -38,4 +42,17 @@ VARYING vec2 vary_texcoord1;
 void main() 
 {
 	frag_color = abs(texture2D(tex0, vary_texcoord0.xy) - texture2D(tex1, vary_texcoord0.xy));
+
+	vec2 dither_coord;
+	dither_coord[0] = vary_texcoord0[0] * dither_scale_s;
+	dither_coord[1] = vary_texcoord0[1] * dither_scale_t;
+	vec4 dither_vec = texture(dither_tex, dither_coord.xy);
+
+	for(int i = 0; i < 3; i++)
+	{
+		if(frag_color[i] < dither_vec[i] * dither_scale)
+		{
+			frag_color[i] = 0.f;
+		}
+	}
 }
diff --git a/indra/newview/llagent.cpp b/indra/newview/llagent.cpp
index 14235bcee4..24c9da8e17 100755
--- a/indra/newview/llagent.cpp
+++ b/indra/newview/llagent.cpp
@@ -1046,6 +1046,14 @@ const LLVector3d &LLAgent::getPositionGlobal() const
 	return mPositionGlobal;
 }
 
+bool LLAgent::isPositionChanged() const
+{
+	LLVector3d diff;
+	diff = mPositionGlobal - mLastPositionGlobal;
+	
+	return diff.lengthSquared() > 1.0;
+}
+
 //-----------------------------------------------------------------------------
 // getPositionAgent()
 //-----------------------------------------------------------------------------
diff --git a/indra/newview/llagent.h b/indra/newview/llagent.h
index 99904e118c..a1e899b45d 100644
--- a/indra/newview/llagent.h
+++ b/indra/newview/llagent.h
@@ -250,6 +250,8 @@ public:
 	
 	const LLVector3d &getLastPositionGlobal() const { return mLastPositionGlobal; }
 	void			setLastPositionGlobal(const LLVector3d &pos) { mLastPositionGlobal = pos; }
+
+	bool            isPositionChanged() const;
 private:
 	std::set<U64>	mRegionsVisited;		// Stat - what distinct regions has the avatar been to?
 	F64				mDistanceTraveled;		// Stat - how far has the avatar moved?
diff --git a/indra/newview/llscenemonitor.cpp b/indra/newview/llscenemonitor.cpp
index 189697dcf0..9de6b52d12 100644
--- a/indra/newview/llscenemonitor.cpp
+++ b/indra/newview/llscenemonitor.cpp
@@ -37,6 +37,8 @@
 #include "llwindow.h"
 #include "llpointer.h"
 #include "llspatialpartition.h"
+#include "llagent.h"
+#include "pipeline.h"
 
 LLSceneMonitorView* gSceneMonitorView = NULL;
 
@@ -67,7 +69,10 @@ LLSceneMonitor::LLSceneMonitor() :
 	mDiffPixelRatio(0.5f)
 {
 	mFrames[0] = NULL;
-	mFrames[1] = NULL;	
+	mFrames[1] = NULL;
+
+	mRecording = new LLTrace::ExtendableRecording();
+	mRecording->start();
 }
 
 LLSceneMonitor::~LLSceneMonitor()
@@ -78,6 +83,10 @@ LLSceneMonitor::~LLSceneMonitor()
 void LLSceneMonitor::destroyClass()
 {
 	reset();
+
+	delete mRecording;
+	mRecording = NULL;
+	mDitheringTexture = NULL;
 }
 
 void LLSceneMonitor::reset()
@@ -100,6 +109,67 @@ void LLSceneMonitor::reset()
 	}
 }
 
+void LLSceneMonitor::generateDitheringTexture(S32 width, S32 height)
+{
+#if 1
+	//4 * 4 matrix
+	mDitherMatrixWidth = 4;	
+	S32 dither_matrix[4][4] = 
+	{
+		{1, 9, 3, 11}, 
+		{13, 5, 15, 7}, 
+		{4, 12, 2, 10}, 
+		{16, 8, 14, 6}
+	};
+	
+	mDitherScale = 255.f / 17;
+#else
+	//8 * 8 matrix
+	mDitherMatrixWidth = 16;	
+	S32 dither_matrix[16][16] = 
+	{
+		{1, 49, 13, 61, 4, 52, 16, 64, 1, 49, 13, 61, 4, 52, 16, 64}, 
+		{33, 17, 45, 29, 36, 20, 48, 32, 33, 17, 45, 29, 36, 20, 48, 32}, 
+		{9, 57, 5, 53, 12, 60, 8, 56, 9, 57, 5, 53, 12, 60, 8, 56}, 
+		{41, 25, 37, 21, 44, 28, 40, 24, 41, 25, 37, 21, 44, 28, 40, 24},
+		{3, 51, 15, 63, 2, 50, 14, 62, 3, 51, 15, 63, 2, 50, 14, 62},
+		{35, 19, 47, 31, 34, 18, 46, 30, 35, 19, 47, 31, 34, 18, 46, 30},
+		{11, 59, 7, 55, 10, 58, 6, 54, 11, 59, 7, 55, 10, 58, 6, 54},
+		{43, 27, 39, 23, 42, 26, 38, 22, 43, 27, 39, 23, 42, 26, 38, 22},
+		{1, 49, 13, 61, 4, 52, 16, 64, 1, 49, 13, 61, 4, 52, 16, 64}, 
+		{33, 17, 45, 29, 36, 20, 48, 32, 33, 17, 45, 29, 36, 20, 48, 32}, 
+		{9, 57, 5, 53, 12, 60, 8, 56, 9, 57, 5, 53, 12, 60, 8, 56}, 
+		{41, 25, 37, 21, 44, 28, 40, 24, 41, 25, 37, 21, 44, 28, 40, 24},
+		{3, 51, 15, 63, 2, 50, 14, 62, 3, 51, 15, 63, 2, 50, 14, 62},
+		{35, 19, 47, 31, 34, 18, 46, 30, 35, 19, 47, 31, 34, 18, 46, 30},
+		{11, 59, 7, 55, 10, 58, 6, 54, 11, 59, 7, 55, 10, 58, 6, 54},
+		{43, 27, 39, 23, 42, 26, 38, 22, 43, 27, 39, 23, 42, 26, 38, 22}
+	};
+
+	mDitherScale = 255.f / 65;
+#endif
+
+	LLPointer<LLImageRaw> image_raw = new LLImageRaw(mDitherMatrixWidth, mDitherMatrixWidth, 3);
+	U8* data = image_raw->getData();
+	for (S32 i = 0; i < mDitherMatrixWidth; i++)
+	{
+		for (S32 j = 0; j < mDitherMatrixWidth; j++)
+		{
+			U8 val = dither_matrix[i][j];
+			*data++ = val;
+			*data++ = val;
+			*data++ = val;
+		}
+	}
+
+	mDitheringTexture = LLViewerTextureManager::getLocalTexture(image_raw.get(), FALSE) ;
+	mDitheringTexture->setAddressMode(LLTexUnit::TAM_WRAP);
+	mDitheringTexture->setFilteringOption(LLTexUnit::TFO_POINT);
+	
+	mDitherScaleS = (F32)width / mDitherMatrixWidth;
+	mDitherScaleT = (F32)height / mDitherMatrixWidth;
+}
+
 void LLSceneMonitor::setDebugViewerVisible(BOOL visible) 
 {
 	mDebugViewerVisible = visible;
@@ -137,6 +207,11 @@ bool LLSceneMonitor::preCapture()
 		return false;
 	}
 
+	if(gAgent.isPositionChanged())
+	{
+		mRecording->reset();
+	}
+
 	if(timer.getElapsedTimeF32() < mSamplingTime)
 	{
 		return false;
@@ -197,6 +272,9 @@ void LLSceneMonitor::freezeScene()
 
 	// freeze everything else
 	gSavedSettings.setBOOL("FreezeTime", TRUE);
+
+	gPipeline.clearRenderTypeMask(LLPipeline::RENDER_TYPE_SKY, LLPipeline::RENDER_TYPE_WL_SKY, 
+		LLPipeline::RENDER_TYPE_WATER, LLPipeline::RENDER_TYPE_CLOUDS, LLPipeline::END_RENDER_TYPES);
 }
 
 void LLSceneMonitor::unfreezeScene()
@@ -206,6 +284,9 @@ void LLSceneMonitor::unfreezeScene()
 
 	// thaw everything else
 	gSavedSettings.setBOOL("FreezeTime", FALSE);
+
+	gPipeline.setRenderTypeMask(LLPipeline::RENDER_TYPE_SKY, LLPipeline::RENDER_TYPE_WL_SKY, 
+		LLPipeline::RENDER_TYPE_WATER, LLPipeline::RENDER_TYPE_CLOUDS, LLPipeline::END_RENDER_TYPES);
 }
 
 void LLSceneMonitor::capture()
@@ -268,10 +349,13 @@ void LLSceneMonitor::compare()
 	{
 		mDiff = new LLRenderTarget();
 		mDiff->allocate(width, height, GL_RGBA, false, false, LLTexUnit::TT_TEXTURE, true);
+
+		generateDitheringTexture(width, height);
 	}
 	else if(mDiff->getWidth() != width || mDiff->getHeight() != height)
 	{
 		mDiff->resize(width, height, GL_RGBA);
+		generateDitheringTexture(width, height);
 	}
 
 	mDiff->bindTarget();
@@ -279,6 +363,10 @@ void LLSceneMonitor::compare()
 	
 	gTwoTextureCompareProgram.bind();
 	
+	gTwoTextureCompareProgram.uniform1f("dither_scale", mDitherScale);
+	gTwoTextureCompareProgram.uniform1f("dither_scale_s", mDitherScaleS);
+	gTwoTextureCompareProgram.uniform1f("dither_scale_t", mDitherScaleT);
+
 	gGL.getTexUnit(0)->activate();
 	gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
 	gGL.getTexUnit(0)->bind(mFrames[0]);
@@ -289,6 +377,11 @@ void LLSceneMonitor::compare()
 	gGL.getTexUnit(1)->bind(mFrames[1]);
 	gGL.getTexUnit(1)->activate();	
 	
+	gGL.getTexUnit(2)->activate();
+	gGL.getTexUnit(2)->enable(LLTexUnit::TT_TEXTURE);
+	gGL.getTexUnit(2)->bind(mDitheringTexture);
+	gGL.getTexUnit(2)->activate();	
+
 	gl_rect_2d_simple_tex(width, height);
 	
 	mDiff->flush();	
@@ -299,6 +392,8 @@ void LLSceneMonitor::compare()
 	gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
 	gGL.getTexUnit(1)->disable();
 	gGL.getTexUnit(1)->unbind(LLTexUnit::TT_TEXTURE);
+	gGL.getTexUnit(2)->disable();
+	gGL.getTexUnit(2)->unbind(LLTexUnit::TT_TEXTURE);
 
 	mHasNewDiff = TRUE;
 	
@@ -388,6 +483,10 @@ void LLSceneMonitor::fetchQueryResult()
 	
 	mDiffResult = count * 0.5f / (mDiff->getWidth() * mDiff->getHeight() * mDiffPixelRatio * mDiffPixelRatio); //0.5 -> (front face + back face)
 
+	if(mDiffResult > 0.01f)
+	{
+		mRecording->extend();
+	}
 	//llinfos << count << " : " << mDiffResult << llendl;
 }
 //-------------------------------------------------------------------------------------------------------------
@@ -454,6 +553,11 @@ void LLSceneMonitorView::draw()
 
 	num_str = llformat("Sampling time: %.3f seconds", LLSceneMonitor::getInstance()->getSamplingTime());
 	LLFontGL::getFontMonospace()->renderUTF8(num_str, 0, 5, getRect().getHeight() - line_height * lines, color, LLFontGL::LEFT, LLFontGL::TOP);
+	lines++;
+
+	num_str = llformat("Scene Loading time: %.3f seconds", (F32)LLSceneMonitor::getInstance()->getRecording()->getAcceptedRecording().getDuration().value());
+	LLFontGL::getFontMonospace()->renderUTF8(num_str, 0, 5, getRect().getHeight() - line_height * lines, color, LLFontGL::LEFT, LLFontGL::TOP);
+	lines++;
 
 	LLView::draw();
 }
diff --git a/indra/newview/llscenemonitor.h b/indra/newview/llscenemonitor.h
index 02e3d57d46..709650e206 100644
--- a/indra/newview/llscenemonitor.h
+++ b/indra/newview/llscenemonitor.h
@@ -31,9 +31,11 @@
 #include "llmath.h"
 #include "llfloater.h"
 #include "llcharacter.h"
+#include "lltracerecording.h"
 
 class LLCharacter;
 class LLRenderTarget;
+class LLViewerTexture;
 
 class LLSceneMonitor :  public LLSingleton<LLSceneMonitor>
 {
@@ -61,11 +63,14 @@ public:
 	bool isEnabled()const {return mEnabled;}
 	bool needsUpdate() const;
 	
+	LLTrace::ExtendableRecording* getRecording() const {return mRecording;}
+
 private:
 	void freezeScene();
 	void unfreezeScene();
 	void reset();
 	bool preCapture();
+	void generateDitheringTexture(S32 width, S32 height);
 
 private:
 	BOOL mEnabled;
@@ -85,7 +90,15 @@ private:
 	F32     mSamplingTime; //time interval to capture frames, in seconds
 	F32     mDiffPixelRatio; //ratio of pixels used for comparison against the original mDiff size along one dimension
 
+	LLPointer<LLViewerTexture> mDitheringTexture;
+	S32                        mDitherMatrixWidth;
+	F32                        mDitherScale;
+	F32                        mDitherScaleS;
+	F32                        mDitherScaleT;
+
 	std::vector<LLAnimPauseRequest> mAvatarPauseHandles;
+
+	LLTrace::ExtendableRecording* mRecording;
 };
 
 class LLSceneMonitorView : public LLFloater
diff --git a/indra/newview/llviewerobjectlist.cpp b/indra/newview/llviewerobjectlist.cpp
index 0335cd769b..dce963c5c5 100644
--- a/indra/newview/llviewerobjectlist.cpp
+++ b/indra/newview/llviewerobjectlist.cpp
@@ -657,13 +657,15 @@ void LLViewerObjectList::processCachedObjectUpdate(LLMessageSystem *mesgsys,
 		S32	msg_size = 0;
 		U32 id;
 		U32 crc;
+		U32 flags;
 		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_ID, id, i);
 		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_CRC, crc, i);
+		mesgsys->getU32Fast(_PREHASH_ObjectData, _PREHASH_UpdateFlags, flags, i);
 		msg_size += sizeof(U32) * 2;
 		
 		// Lookup data packer and add this id to cache miss lists if necessary.
 		U8 cache_miss_type = LLViewerRegion::CACHE_MISS_TYPE_NONE;
-		if(!regionp->probeCache(id, crc, cache_miss_type))
+		if(!regionp->probeCache(id, crc, flags, cache_miss_type))
 		{
 			// Cache Miss.
 			recorder.cacheMissEvent(id, update_type, cache_miss_type, msg_size);
diff --git a/indra/newview/llviewerregion.cpp b/indra/newview/llviewerregion.cpp
index 570bf9264c..e5cb2a1b08 100644
--- a/indra/newview/llviewerregion.cpp
+++ b/indra/newview/llviewerregion.cpp
@@ -1721,9 +1721,26 @@ LLVOCacheEntry* LLViewerRegion::getCacheEntry(U32 local_id)
 	return NULL;
 }
 
+//estimate weight of cache missed object
+F32 LLViewerRegion::calcObjectWeight(U32 flags)
+{
+	LLVector3 pos((F32)(flags & 0xff) + 0.5f, (F32)((flags >> 8) & 0xff) + 0.5f, (F32)((flags >> 16) & 0xff) * 16.f + 8.0f);
+	F32 rad = (F32)((flags >> 24) & 0xff);
+
+	pos += getOriginAgent();
+	pos -= LLViewerCamera::getInstance()->getOrigin();
+
+	return 100.f * rad * rad / pos.lengthSquared();
+}
+
+void LLViewerRegion::addCacheMiss(U32 id, LLViewerRegion::eCacheMissType miss_type, F32 weight)
+{
+	mCacheMissList.insert(CacheMissItem(id, miss_type, weight));
+}
+
 // Get data packer for this object, if we have cached data
 // AND the CRC matches. JC
-bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U8 &cache_miss_type)
+bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U32 flags, U8 &cache_miss_type)
 {
 	//llassert(mCacheLoaded);  This assert failes often, changing to early-out -- davep, 2010/10/18
 
@@ -1749,15 +1766,14 @@ bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U8 &cache_miss_type)
 		else
 		{
 			// llinfos << "CRC miss for " << local_id << llendl;
-			cache_miss_type = CACHE_MISS_TYPE_CRC;
-			mCacheMissCRC.put(local_id);
+
+			addCacheMiss(local_id, CACHE_MISS_TYPE_CRC, calcObjectWeight(flags));
 		}
 	}
 	else
 	{
 		// llinfos << "Cache miss for " << local_id << llendl;
-		cache_miss_type = CACHE_MISS_TYPE_FULL;
-		mCacheMissFull.put(local_id);
+		addCacheMiss(local_id, CACHE_MISS_TYPE_FULL, calcObjectWeight(flags));
 	}
 
 	return false;
@@ -1765,49 +1781,22 @@ bool LLViewerRegion::probeCache(U32 local_id, U32 crc, U8 &cache_miss_type)
 
 void LLViewerRegion::addCacheMissFull(const U32 local_id)
 {
-	mCacheMissFull.put(local_id);
+	addCacheMiss(local_id, CACHE_MISS_TYPE_FULL, 100.f);
 }
 
 void LLViewerRegion::requestCacheMisses()
 {
-	S32 full_count = mCacheMissFull.count();
-	S32 crc_count = mCacheMissCRC.count();
-	if (full_count == 0 && crc_count == 0) return;
+	if (!mCacheMissList.size()) 
+	{
+		return;
+	}
 
 	LLMessageSystem* msg = gMessageSystem;
 	BOOL start_new_message = TRUE;
 	S32 blocks = 0;
-	S32 i;
-
-	// Send full cache miss updates.  For these, we KNOW we don't
-	// have a viewer object.
-	for (i = 0; i < full_count; i++)
-	{
-		if (start_new_message)
-		{
-			msg->newMessageFast(_PREHASH_RequestMultipleObjects);
-			msg->nextBlockFast(_PREHASH_AgentData);
-			msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
-			msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
-			start_new_message = FALSE;
-		}
-
-		msg->nextBlockFast(_PREHASH_ObjectData);
-		msg->addU8Fast(_PREHASH_CacheMissType, CACHE_MISS_TYPE_FULL);
-		msg->addU32Fast(_PREHASH_ID, mCacheMissFull[i]);
-		blocks++;
-
-		if (blocks >= 255)
-		{
-			sendReliableMessage();
-			start_new_message = TRUE;
-			blocks = 0;
-		}
-	}
-
-	// Send CRC miss updates.  For these, we _might_ have a viewer object,
-	// but probably not.
-	for (i = 0; i < crc_count; i++)
+	
+	//send requests for all cache-missed objects
+	for (CacheMissItem::cache_miss_list_t::iterator iter = mCacheMissList.begin(); iter != mCacheMissList.end(); ++iter)
 	{
 		if (start_new_message)
 		{
@@ -1819,8 +1808,8 @@ void LLViewerRegion::requestCacheMisses()
 		}
 
 		msg->nextBlockFast(_PREHASH_ObjectData);
-		msg->addU8Fast(_PREHASH_CacheMissType, CACHE_MISS_TYPE_CRC);
-		msg->addU32Fast(_PREHASH_ID, mCacheMissCRC[i]);
+		msg->addU8Fast(_PREHASH_CacheMissType, (*iter).mType);
+		msg->addU32Fast(_PREHASH_ID, (*iter).mID);
 		blocks++;
 
 		if (blocks >= 255)
@@ -1835,14 +1824,14 @@ void LLViewerRegion::requestCacheMisses()
 	if (!start_new_message)
 	{
 		sendReliableMessage();
-	}
-	mCacheMissFull.reset();
-	mCacheMissCRC.reset();
+	}	
 
 	mCacheDirty = TRUE ;
 	// llinfos << "KILLDEBUG Sent cache miss full " << full_count << " crc " << crc_count << llendl;
-	LLViewerStatsRecorder::instance().requestCacheMissesEvent(full_count + crc_count);
+	LLViewerStatsRecorder::instance().requestCacheMissesEvent(mCacheMissList.size());
 	LLViewerStatsRecorder::instance().log(0.2f);
+
+	mCacheMissList.clear();
 }
 
 void LLViewerRegion::dumpCache()
diff --git a/indra/newview/llviewerregion.h b/indra/newview/llviewerregion.h
index 9252923aa3..de14c0fe27 100644
--- a/indra/newview/llviewerregion.h
+++ b/indra/newview/llviewerregion.h
@@ -169,6 +169,9 @@ public:
 	const LLVector3d &getOriginGlobal() const;
 	LLVector3 getOriginAgent() const;
 
+	//estimate weight of cache missed object
+	F32 calcObjectWeight(U32 flags);
+
 	// Center is at the height of the water table.
 	const LLVector3d &getCenterGlobal() const;
 	LLVector3 getCenterAgent() const;
@@ -316,7 +319,7 @@ public:
 	// handle a full update message
 	eCacheUpdateResult cacheFullUpdate(LLViewerObject* objectp, LLDataPackerBinaryBuffer &dp);	
 	LLVOCacheEntry* getCacheEntryForOctree(U32 local_id);
-	bool probeCache(U32 local_id, U32 crc, U8 &cache_miss_type);
+	bool probeCache(U32 local_id, U32 crc, U32 flags, U8 &cache_miss_type);
 	void requestCacheMisses();
 	void addCacheMissFull(const U32 local_id);
 
@@ -356,6 +359,7 @@ private:
 	F32 createVisibleObjects(F32 max_time);
 	F32 updateVisibleEntries(F32 max_time); //update visible entries
 
+	void addCacheMiss(U32 id, LLViewerRegion::eCacheMissType miss_type, F32 weight);
 public:
 	struct CompareDistance
 	{
@@ -441,8 +445,33 @@ private:
 	BOOL    mReleaseNotesRequested;
 	BOOL    mDead;  //if true, this region is in the process of deleting.
 
-	LLDynamicArray<U32>						mCacheMissFull;
-	LLDynamicArray<U32>						mCacheMissCRC;
+	class CacheMissItem
+	{
+	public:
+		CacheMissItem(U32 id, LLViewerRegion::eCacheMissType miss_type, F32 weight) : mID(id), mType(miss_type), mWeight(weight){}
+
+		U32                            mID;     //local object id
+		LLViewerRegion::eCacheMissType mType;   //cache miss type
+		F32                            mWeight; //importance of this object to the current camera.
+	
+		struct Compare
+		{
+			bool operator()(const CacheMissItem& lhs, const CacheMissItem& rhs)
+			{
+				if(lhs.mWeight == rhs.mWeight) //larger weight first
+				{
+					return &lhs < &rhs;
+				}
+				else 
+				{
+					return lhs.mWeight > rhs.mWeight; //larger weight first
+				}
+			}
+		};
+
+		typedef std::set<CacheMissItem, Compare> cache_miss_list_t;
+	};
+	CacheMissItem::cache_miss_list_t        mCacheMissList;
 	
 	caps_received_signal_t mCapabilitiesReceivedSignal;		
 	LLSD mSimulatorFeatures;
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index 1aa36eafee..dd86ef4f34 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -2723,6 +2723,7 @@ BOOL LLViewerShaderMgr::loadShadersInterface()
 			gTwoTextureCompareProgram.bind();
 			gTwoTextureCompareProgram.uniform1i("tex0", 0);
 			gTwoTextureCompareProgram.uniform1i("tex1", 1);
+			gTwoTextureCompareProgram.uniform1i("dither_tex", 2);
 		}
 	}