SL-18869 Optimizations -- Revive "Frame Profile" and GL_DEPTH_CLAMP. Remove usage of gl_FragDepth from shadow shaders.

13 files changed, 542 insertions, 641 deletions

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index e3b29dc812..b5da3d08e2 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -1,25 +1,25 @@
-/** 
+/**
  * @file llglslshader.cpp
  * @brief GLSL helper functions and state.
  *
  * $LicenseInfo:firstyear=2005&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
@@ -37,8 +37,8 @@
 #include "OpenGL/OpenGL.h"
 #endif
 
-// Print-print list of shader included source files that are linked together via glAttachShader()
-// i.e. On macOS / OSX the AMD GLSL linker will display an error if a varying is left in an undefined state.
+ // Print-print list of shader included source files that are linked together via glAttachShader()
+ // i.e. On macOS / OSX the AMD GLSL linker will display an error if a varying is left in an undefined state.
 #define DEBUG_SHADER_INCLUDES 0
 
 // Lots of STL stuff in here, using namespace std to keep things more readable
@@ -55,24 +55,24 @@ std::set<LLGLSLShader*> LLGLSLShader::sInstances;
 U64 LLGLSLShader::sTotalTimeElapsed = 0;
 U32 LLGLSLShader::sTotalTrianglesDrawn = 0;
 U64 LLGLSLShader::sTotalSamplesDrawn = 0;
-U32 LLGLSLShader::sTotalDrawCalls = 0;
+U32 LLGLSLShader::sTotalBinds = 0;
 
 //UI shader -- declared here so llui_libtest will link properly
 LLGLSLShader    gUIProgram;
 LLGLSLShader    gSolidColorProgram;
 
 // NOTE: Keep gShaderConsts* and LLGLSLShader::ShaderConsts_e in sync!
-const std::string gShaderConstsKey[ LLGLSLShader::NUM_SHADER_CONSTS ] =
+const std::string gShaderConstsKey[LLGLSLShader::NUM_SHADER_CONSTS] =
 {
-	  "LL_SHADER_CONST_CLOUD_MOON_DEPTH"
-	, "LL_SHADER_CONST_STAR_DEPTH"
+      "LL_SHADER_CONST_CLOUD_MOON_DEPTH"
+    , "LL_SHADER_CONST_STAR_DEPTH"
 };
 
 // NOTE: Keep gShaderConsts* and LLGLSLShader::ShaderConsts_e in sync!
-const std::string gShaderConstsVal[ LLGLSLShader::NUM_SHADER_CONSTS ] =
+const std::string gShaderConstsVal[LLGLSLShader::NUM_SHADER_CONSTS] =
 {
-	  "0.99998" // SHADER_CONST_CLOUD_MOON_DEPTH // SL-14113
-	, "0.99999" // SHADER_CONST_STAR_DEPTH       // SL-14113
+      "0.99998" // SHADER_CONST_CLOUD_MOON_DEPTH // SL-14113
+    , "0.99999" // SHADER_CONST_STAR_DEPTH       // SL-14113
 };
 
 
@@ -121,7 +121,7 @@ void LLGLSLShader::initProfile()
     sTotalTimeElapsed = 0;
     sTotalTrianglesDrawn = 0;
     sTotalSamplesDrawn = 0;
-    sTotalDrawCalls = 0;
+    sTotalBinds = 0;
 
     for (std::set<LLGLSLShader*>::iterator iter = sInstances.begin(); iter != sInstances.end(); ++iter)
     {
@@ -132,10 +132,10 @@ void LLGLSLShader::initProfile()
 
 struct LLGLSLShaderCompareTimeElapsed
 {
-        bool operator()(const LLGLSLShader* const& lhs, const LLGLSLShader* const& rhs)
-        {
-            return lhs->mTimeElapsed < rhs->mTimeElapsed;
-        }
+    bool operator()(const LLGLSLShader* const& lhs, const LLGLSLShader* const& rhs)
+    {
+        return lhs->mTimeElapsed < rhs->mTimeElapsed;
+    }
 };
 
 //static
@@ -158,11 +158,11 @@ void LLGLSLShader::finishProfile(bool emit_report)
         {
             (*iter)->dumpStats();
         }
-            
-    LL_INFOS() << "-----------------------------------" << LL_ENDL;
-    LL_INFOS() << "Total rendering time: " << llformat("%.4f ms", sTotalTimeElapsed/1000000.f) << LL_ENDL;
-    LL_INFOS() << "Total samples drawn: " << llformat("%.4f million", sTotalSamplesDrawn/1000000.f) << LL_ENDL;
-    LL_INFOS() << "Total triangles drawn: " << llformat("%.3f million", sTotalTrianglesDrawn/1000000.f) << LL_ENDL;
+
+        LL_INFOS() << "-----------------------------------" << LL_ENDL;
+        LL_INFOS() << "Total rendering time: " << llformat("%.4f ms", sTotalTimeElapsed / 1000000.f) << LL_ENDL;
+        LL_INFOS() << "Total samples drawn: " << llformat("%.4f million", sTotalSamplesDrawn / 1000000.f) << LL_ENDL;
+        LL_INFOS() << "Total triangles drawn: " << llformat("%.3f million", sTotalTrianglesDrawn / 1000000.f) << LL_ENDL;
     }
 }
 
@@ -171,15 +171,12 @@ void LLGLSLShader::clearStats()
     mTrianglesDrawn = 0;
     mTimeElapsed = 0;
     mSamplesDrawn = 0;
-    mDrawCalls = 0;
-    mTextureStateFetched = false;
-    mTextureMagFilter.clear();
-    mTextureMinFilter.clear();
+    mBinds = 0;
 }
 
 void LLGLSLShader::dumpStats()
 {
-    if (mDrawCalls > 0)
+    if (mBinds > 0)
     {
         LL_INFOS() << "=============================================" << LL_ENDL;
         LL_INFOS() << mName << LL_ENDL;
@@ -187,36 +184,25 @@ void LLGLSLShader::dumpStats()
         {
             LL_INFOS() << mShaderFiles[i].first << LL_ENDL;
         }
-        for (U32 i = 0; i < mTexture.size(); ++i)
-        {
-            GLint idx = mTexture[i];
-            
-            if (idx >= 0)
-            {
-                GLint uniform_idx = getUniformLocation(i);
-                LL_INFOS() << mUniformNameMap[uniform_idx] << " - " << std::hex << mTextureMagFilter[i] << "/" << mTextureMinFilter[i] << std::dec << LL_ENDL;
-            }
-        }
         LL_INFOS() << "=============================================" << LL_ENDL;
-    
-        F32 ms = mTimeElapsed/1000000.f;
-        F32 seconds = ms/1000.f;
 
-        F32 pct_tris = (F32) mTrianglesDrawn/(F32)sTotalTrianglesDrawn*100.f;
-        F32 tris_sec = (F32) (mTrianglesDrawn/1000000.0);
+        F32 ms = mTimeElapsed / 1000000.f;
+        F32 seconds = ms / 1000.f;
+
+        F32 pct_tris = (F32)mTrianglesDrawn / (F32)sTotalTrianglesDrawn * 100.f;
+        F32 tris_sec = (F32)(mTrianglesDrawn / 1000000.0);
         tris_sec /= seconds;
 
-        F32 pct_samples = (F32) ((F64)mSamplesDrawn/(F64)sTotalSamplesDrawn)*100.f;
-        F32 samples_sec = (F32) mSamplesDrawn/1000000000.0;
+        F32 pct_samples = (F32)((F64)mSamplesDrawn / (F64)sTotalSamplesDrawn) * 100.f;
+        F32 samples_sec = (F32)mSamplesDrawn / 1000000000.0;
         samples_sec /= seconds;
 
-        F32 pct_calls = (F32) mDrawCalls/(F32)sTotalDrawCalls*100.f;
-        U32 avg_batch = mTrianglesDrawn/mDrawCalls;
+        F32 pct_binds = (F32)mBinds / (F32)sTotalBinds * 100.f;
 
-        LL_INFOS() << "Triangles Drawn: " << mTrianglesDrawn <<  " " << llformat("(%.2f pct of total, %.3f million/sec)", pct_tris, tris_sec ) << LL_ENDL;
-        LL_INFOS() << "Draw Calls: " << mDrawCalls << " " << llformat("(%.2f pct of total, avg %d tris/call)", pct_calls, avg_batch) << LL_ENDL;
+        LL_INFOS() << "Triangles Drawn: " << mTrianglesDrawn << " " << llformat("(%.2f pct of total, %.3f million/sec)", pct_tris, tris_sec) << LL_ENDL;
+        LL_INFOS() << "Binds: " << mBinds << " " << llformat("(%.2f pct of total)", pct_binds) << LL_ENDL;
         LL_INFOS() << "SamplesDrawn: " << mSamplesDrawn << " " << llformat("(%.2f pct of total, %.3f billion/sec)", pct_samples, samples_sec) << LL_ENDL;
-        LL_INFOS() << "Time Elapsed: " << mTimeElapsed << " " << llformat("(%.2f pct of total, %.5f ms)\n", (F32) ((F64)mTimeElapsed/(F64)sTotalTimeElapsed)*100.f, ms) << LL_ENDL;
+        LL_INFOS() << "Time Elapsed: " << mTimeElapsed << " " << llformat("(%.2f pct of total, %.5f ms)\n", (F32)((F64)mTimeElapsed / (F64)sTotalTimeElapsed) * 100.f, ms) << LL_ENDL;
     }
 }
 
@@ -232,108 +218,80 @@ void LLGLSLShader::startProfile()
 }
 
 //static
-void LLGLSLShader::stopProfile(U32 count, U32 mode)
+void LLGLSLShader::stopProfile()
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
+
     if (sProfileEnabled && sCurBoundShaderPtr)
     {
-        sCurBoundShaderPtr->readProfileQuery(count, mode);
+        sCurBoundShaderPtr->unbind();
     }
 }
 
 void LLGLSLShader::placeProfileQuery()
 {
-    if (mTimerQuery == 0)
+    if (sProfileEnabled)
     {
-        glGenQueries(1, &mSamplesQuery);
-        glGenQueries(1, &mTimerQuery);
-    }
-
-    if (!mTextureStateFetched)
-    {
-        mTextureStateFetched = true;
-        mTextureMagFilter.resize(mTexture.size());
-        mTextureMinFilter.resize(mTexture.size());
-
-        U32 cur_active = gGL.getCurrentTexUnitIndex();
-
-        for (U32 i = 0; i < mTexture.size(); ++i)
+        if (mTimerQuery == 0)
         {
-            GLint idx = mTexture[i];
-
-            if (idx >= 0)
-            {
-                gGL.getTexUnit(idx)->activate();
-
-                U32 mag = 0xFFFFFFFF;
-                U32 min = 0xFFFFFFFF;
-
-                U32 type = LLTexUnit::getInternalType(gGL.getTexUnit(idx)->getCurrType());
-
-                glGetTexParameteriv(type, GL_TEXTURE_MAG_FILTER, (GLint*) &mag);
-                glGetTexParameteriv(type, GL_TEXTURE_MIN_FILTER, (GLint*) &min);
-
-                mTextureMagFilter[i] = mag;
-                mTextureMinFilter[i] = min;
-            }
+            glGenQueries(1, &mSamplesQuery);
+            glGenQueries(1, &mTimerQuery);
+            glGenQueries(1, &mPrimitivesQuery);
         }
 
-        gGL.getTexUnit(cur_active)->activate();
+        glBeginQuery(GL_SAMPLES_PASSED, mSamplesQuery);
+        glBeginQuery(GL_TIME_ELAPSED, mTimerQuery);
+        glBeginQuery(GL_PRIMITIVES_GENERATED, mPrimitivesQuery);
     }
-
-
-    glBeginQuery(GL_SAMPLES_PASSED, mSamplesQuery);
-    glBeginQuery(GL_TIME_ELAPSED, mTimerQuery);
 }
 
-void LLGLSLShader::readProfileQuery(U32 count, U32 mode)
+void LLGLSLShader::readProfileQuery()
 {
-    glEndQuery(GL_TIME_ELAPSED);
-    glEndQuery(GL_SAMPLES_PASSED);
-    
-    U64 time_elapsed = 0;
-    glGetQueryObjectui64v(mTimerQuery, GL_QUERY_RESULT, &time_elapsed);
+    if (sProfileEnabled)
+    {
+        glEndQuery(GL_TIME_ELAPSED);
+        glEndQuery(GL_SAMPLES_PASSED);
+        glEndQuery(GL_PRIMITIVES_GENERATED);
 
-    U64 samples_passed = 0;
-    glGetQueryObjectui64v(mSamplesQuery, GL_QUERY_RESULT, &samples_passed);
+        U64 time_elapsed = 0;
+        glGetQueryObjectui64v(mTimerQuery, GL_QUERY_RESULT, &time_elapsed);
 
-    sTotalTimeElapsed += time_elapsed;
-    mTimeElapsed += time_elapsed;
+        U64 samples_passed = 0;
+        glGetQueryObjectui64v(mSamplesQuery, GL_QUERY_RESULT, &samples_passed);
 
-    sTotalSamplesDrawn += samples_passed;
-    mSamplesDrawn += samples_passed;
+        U64 primitives_generated = 0;
+        glGetQueryObjectui64v(mPrimitivesQuery, GL_QUERY_RESULT, &primitives_generated);
+        sTotalTimeElapsed += time_elapsed;
+        mTimeElapsed += time_elapsed;
 
-    U32 tri_count = 0;
-    switch (mode)
-    {
-        case LLRender::TRIANGLES: tri_count = count/3; break;
-        case LLRender::TRIANGLE_FAN: tri_count = count-2; break;
-        case LLRender::TRIANGLE_STRIP: tri_count = count-2; break;
-        default: tri_count = count; break; //points lines etc just use primitive count
-    }
+        sTotalSamplesDrawn += samples_passed;
+        mSamplesDrawn += samples_passed;
+
+        U32 tri_count = (U32)primitives_generated / 3;
 
-    mTrianglesDrawn += tri_count;
-    sTotalTrianglesDrawn += tri_count;
+        mTrianglesDrawn += tri_count;
+        sTotalTrianglesDrawn += tri_count;
 
-    sTotalDrawCalls++;
-    mDrawCalls++;
+        sTotalBinds++;
+        mBinds++;
+    }
 }
 
 
 
 LLGLSLShader::LLGLSLShader()
-    : mProgramObject(0), 
-      mAttributeMask(0),
-      mTotalUniformSize(0),
-      mActiveTextureChannels(0), 
-      mShaderLevel(0), 
-      mShaderGroup(SG_DEFAULT), 
-      mUniformsDirty(FALSE),
-      mTimerQuery(0),
-      mSamplesQuery(0)
-
+    : mProgramObject(0),
+    mAttributeMask(0),
+    mTotalUniformSize(0),
+    mActiveTextureChannels(0),
+    mShaderLevel(0),
+    mShaderGroup(SG_DEFAULT),
+    mUniformsDirty(FALSE),
+    mTimerQuery(0),
+    mSamplesQuery(0),
+    mPrimitivesQuery(0)
 {
-    
+
 }
 
 LLGLSLShader::~LLGLSLShader()
@@ -399,10 +357,10 @@ void LLGLSLShader::unloadInternal()
     stop_glerror();
 }
 
-BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
-                                std::vector<LLStaticHashedString> * uniforms,
-                                U32 varying_count,
-                                const char** varyings)
+BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString>* attributes,
+    std::vector<LLStaticHashedString>* uniforms,
+    U32 varying_count,
+    const char** varyings)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
@@ -430,19 +388,19 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
     }
 
     BOOL success = TRUE;
-    
+
 #if LL_DARWIN
     // work-around missing mix(vec3,vec3,bvec3)
     mDefines["OLD_SELECT"] = "1";
 #endif
-    
+
 #if DEBUG_SHADER_INCLUDES
     fprintf(stderr, "--- %s ---\n", mName.c_str());
 #endif // DEBUG_SHADER_INCLUDES
 
     //compile new source
-    vector< pair<string,GLenum> >::iterator fileIter = mShaderFiles.begin();
-    for ( ; fileIter != mShaderFiles.end(); fileIter++ )
+    vector< pair<string, GLenum> >::iterator fileIter = mShaderFiles.begin();
+    for (; fileIter != mShaderFiles.end(); fileIter++)
     {
         GLuint shaderhandle = LLShaderMgr::instance()->loadShaderFile((*fileIter).first, mShaderLevel, (*fileIter).second, &mDefines, mFeatures.mIndexedTextureChannels);
         LL_DEBUGS("ShaderLoading") << "SHADER FILE: " << (*fileIter).first << " mShaderLevel=" << mShaderLevel << LL_ENDL;
@@ -471,7 +429,7 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
 #ifdef GL_INTERLEAVED_ATTRIBS
     if (varying_count > 0 && varyings)
     {
-        glTransformFeedbackVaryings((GLuint64) mProgramObject, varying_count, varyings, GL_INTERLEAVED_ATTRIBS);
+        glTransformFeedbackVaryings((GLuint64)mProgramObject, varying_count, varyings, GL_INTERLEAVED_ATTRIBS);
     }
 #endif
 
@@ -484,7 +442,7 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
     {
         success = mapUniforms(uniforms);
     }
-    if( !success )
+    if (!success)
     {
         LL_SHADER_LOADING_WARNS() << "Failed to link shader: " << mName << LL_ENDL;
 
@@ -493,7 +451,7 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
         {
             LL_SHADER_LOADING_WARNS() << "Failed to link using shader level " << mShaderLevel << " trying again using shader level " << (mShaderLevel - 1) << LL_ENDL;
             mShaderLevel--;
-            return createShader(attributes,uniforms);
+            return createShader(attributes, uniforms);
         }
     }
     else if (mFeatures.mIndexedTextureChannels > 0)
@@ -528,22 +486,22 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
 }
 
 #if DEBUG_SHADER_INCLUDES
-void dumpAttachObject( const char *func_name, GLuint program_object, const std::string &object_path )
+void dumpAttachObject(const char* func_name, GLuint program_object, const std::string& object_path)
 {
     GLchar* info_log;
     GLint      info_len_expect = 0;
     GLint      info_len_actual = 0;
 
-    glGetShaderiv(program_object, GL_INFO_LOG_LENGTH,, &info_len_expect);
+    glGetShaderiv(program_object, GL_INFO_LOG_LENGTH, , &info_len_expect);
     fprintf(stderr, " * %-20s(), log size: %d, %s\n", func_name, info_len_expect, object_path.c_str());
 
     if (info_len_expect > 0)
     {
         fprintf(stderr, " ========== %s() ========== \n", func_name);
-        info_log = new GLchar [ info_len_expect ];
-       glGetProgramInfoLog(program_object, info_len_expect, &info_len_actual, info_log);
-        fprintf(stderr, "%s\n",  info_log);
-        delete [] info_log;
+        info_log = new GLchar[info_len_expect];
+        glGetProgramInfoLog(program_object, info_len_expect, &info_len_actual, info_log);
+        fprintf(stderr, "%s\n", info_log);
+        delete[] info_log;
     }
 }
 #endif // DEBUG_SHADER_INCLUDES
@@ -612,7 +570,7 @@ void LLGLSLShader::attachObjects(GLuint* objects, S32 count)
     }
 }
 
-BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString> * attributes)
+BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString>* attributes)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
@@ -620,9 +578,9 @@ BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString> * attri
     for (U32 i = 0; i < LLShaderMgr::instance()->mReservedAttribs.size(); i++)
     {
         const char* name = LLShaderMgr::instance()->mReservedAttribs[i].c_str();
-        glBindAttribLocation(mProgramObject, i, (const GLchar *) name);
+        glBindAttribLocation(mProgramObject, i, (const GLchar*)name);
     }
-    
+
     //link the program
     BOOL res = link();
 
@@ -633,7 +591,7 @@ BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString> * attri
 #else
     mAttribute.resize(LLShaderMgr::instance()->mReservedAttribs.size() + numAttributes, -1);
 #endif
-    
+
     if (res)
     { //read back channel locations
 
@@ -643,7 +601,7 @@ BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString> * attri
         for (U32 i = 0; i < LLShaderMgr::instance()->mReservedAttribs.size(); i++)
         {
             const char* name = LLShaderMgr::instance()->mReservedAttribs[i].c_str();
-            S32 index = glGetAttribLocation(mProgramObject, (const GLchar *)name);
+            S32 index = glGetAttribLocation(mProgramObject, (const GLchar*)name);
             if (index != -1)
             {
 #if LL_RELEASE_WITH_DEBUG_INFO
@@ -671,11 +629,11 @@ BOOL LLGLSLShader::mapAttributes(const std::vector<LLStaticHashedString> * attri
 
         return TRUE;
     }
-    
+
     return FALSE;
 }
 
-void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString> * uniforms)
+void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString>* uniforms)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
@@ -691,45 +649,45 @@ void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString> *
     name[0] = 0;
 
 
-    glGetActiveUniform(mProgramObject, index, 1024, &length, &size, &type, (GLchar *)name);
+    glGetActiveUniform(mProgramObject, index, 1024, &length, &size, &type, (GLchar*)name);
     if (size > 0)
     {
-        switch(type)
-        {
-            case GL_FLOAT_VEC2: size *= 2; break;
-            case GL_FLOAT_VEC3: size *= 3; break;
-            case GL_FLOAT_VEC4: size *= 4; break;
-            case GL_DOUBLE: size *= 2; break;
-            case GL_DOUBLE_VEC2: size *= 2; break;
-            case GL_DOUBLE_VEC3: size *= 6; break;
-            case GL_DOUBLE_VEC4: size *= 8; break;
-            case GL_INT_VEC2: size *= 2; break;
-            case GL_INT_VEC3: size *= 3; break;
-            case GL_INT_VEC4: size *= 4; break;
-            case GL_UNSIGNED_INT_VEC2: size *= 2; break;
-            case GL_UNSIGNED_INT_VEC3: size *= 3; break;
-            case GL_UNSIGNED_INT_VEC4: size *= 4; break;
-            case GL_BOOL_VEC2: size *= 2; break;
-            case GL_BOOL_VEC3: size *= 3; break;
-            case GL_BOOL_VEC4: size *= 4; break;
-            case GL_FLOAT_MAT2: size *= 4; break;
-            case GL_FLOAT_MAT3: size *= 9; break;
-            case GL_FLOAT_MAT4: size *= 16; break;
-            case GL_FLOAT_MAT2x3: size *= 6; break;
-            case GL_FLOAT_MAT2x4: size *= 8; break;
-            case GL_FLOAT_MAT3x2: size *= 6; break;
-            case GL_FLOAT_MAT3x4: size *= 12; break;
-            case GL_FLOAT_MAT4x2: size *= 8; break;
-            case GL_FLOAT_MAT4x3: size *= 12; break;
-            case GL_DOUBLE_MAT2: size *= 8; break;
-            case GL_DOUBLE_MAT3: size *= 18; break;
-            case GL_DOUBLE_MAT4: size *= 32; break;
-            case GL_DOUBLE_MAT2x3: size *= 12; break;
-            case GL_DOUBLE_MAT2x4: size *= 16; break;
-            case GL_DOUBLE_MAT3x2: size *= 12; break;
-            case GL_DOUBLE_MAT3x4: size *= 24; break;
-            case GL_DOUBLE_MAT4x2: size *= 16; break;
-            case GL_DOUBLE_MAT4x3: size *= 24; break;
+        switch (type)
+        {
+        case GL_FLOAT_VEC2: size *= 2; break;
+        case GL_FLOAT_VEC3: size *= 3; break;
+        case GL_FLOAT_VEC4: size *= 4; break;
+        case GL_DOUBLE: size *= 2; break;
+        case GL_DOUBLE_VEC2: size *= 2; break;
+        case GL_DOUBLE_VEC3: size *= 6; break;
+        case GL_DOUBLE_VEC4: size *= 8; break;
+        case GL_INT_VEC2: size *= 2; break;
+        case GL_INT_VEC3: size *= 3; break;
+        case GL_INT_VEC4: size *= 4; break;
+        case GL_UNSIGNED_INT_VEC2: size *= 2; break;
+        case GL_UNSIGNED_INT_VEC3: size *= 3; break;
+        case GL_UNSIGNED_INT_VEC4: size *= 4; break;
+        case GL_BOOL_VEC2: size *= 2; break;
+        case GL_BOOL_VEC3: size *= 3; break;
+        case GL_BOOL_VEC4: size *= 4; break;
+        case GL_FLOAT_MAT2: size *= 4; break;
+        case GL_FLOAT_MAT3: size *= 9; break;
+        case GL_FLOAT_MAT4: size *= 16; break;
+        case GL_FLOAT_MAT2x3: size *= 6; break;
+        case GL_FLOAT_MAT2x4: size *= 8; break;
+        case GL_FLOAT_MAT3x2: size *= 6; break;
+        case GL_FLOAT_MAT3x4: size *= 12; break;
+        case GL_FLOAT_MAT4x2: size *= 8; break;
+        case GL_FLOAT_MAT4x3: size *= 12; break;
+        case GL_DOUBLE_MAT2: size *= 8; break;
+        case GL_DOUBLE_MAT3: size *= 18; break;
+        case GL_DOUBLE_MAT4: size *= 32; break;
+        case GL_DOUBLE_MAT2x3: size *= 12; break;
+        case GL_DOUBLE_MAT2x4: size *= 16; break;
+        case GL_DOUBLE_MAT3x2: size *= 12; break;
+        case GL_DOUBLE_MAT3x4: size *= 24; break;
+        case GL_DOUBLE_MAT4x2: size *= 16; break;
+        case GL_DOUBLE_MAT4x3: size *= 24; break;
         }
         mTotalUniformSize += size;
     }
@@ -750,11 +708,11 @@ void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString> *
         mUniformMap[hashedName] = location;
 
         LL_DEBUGS("ShaderUniform") << "Uniform " << name << " is at location " << location << LL_ENDL;
-    
+
         //find the index of this uniform
-        for (S32 i = 0; i < (S32) LLShaderMgr::instance()->mReservedUniforms.size(); i++)
+        for (S32 i = 0; i < (S32)LLShaderMgr::instance()->mReservedUniforms.size(); i++)
         {
-            if ( (mUniform[i] == -1)
+            if ((mUniform[i] == -1)
                 && (LLShaderMgr::instance()->mReservedUniforms[i] == name))
             {
                 //found it
@@ -768,12 +726,12 @@ void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString> *
         {
             for (U32 i = 0; i < uniforms->size(); i++)
             {
-                if ( (mUniform[i+LLShaderMgr::instance()->mReservedUniforms.size()] == -1)
+                if ((mUniform[i + LLShaderMgr::instance()->mReservedUniforms.size()] == -1)
                     && ((*uniforms)[i].String() == name))
                 {
                     //found it
-                    mUniform[i+LLShaderMgr::instance()->mReservedUniforms.size()] = location;
-                    mTexture[i+LLShaderMgr::instance()->mReservedUniforms.size()] = mapUniformTextureChannel(location, type, size);
+                    mUniform[i + LLShaderMgr::instance()->mReservedUniforms.size()] = location;
+                    mTexture[i + LLShaderMgr::instance()->mReservedUniforms.size()] = mapUniformTextureChannel(location, type, size);
                     return;
                 }
             }
@@ -791,9 +749,9 @@ void LLGLSLShader::addPermutation(std::string name, std::string value)
     mDefines[name] = value;
 }
 
-void LLGLSLShader::addConstant( const LLGLSLShader::eShaderConsts shader_const )
+void LLGLSLShader::addConstant(const LLGLSLShader::eShaderConsts shader_const)
 {
-    addPermutation( gShaderConstsKey[ shader_const ], gShaderConstsVal[ shader_const ] );
+    addPermutation(gShaderConstsKey[shader_const], gShaderConstsVal[shader_const]);
 }
 
 void LLGLSLShader::removePermutation(std::string name)
@@ -805,7 +763,7 @@ GLint LLGLSLShader::mapUniformTextureChannel(GLint location, GLenum type, GLint
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
-    if ((type >= GL_SAMPLER_1D  && type <= GL_SAMPLER_2D_RECT_SHADOW) ||
+    if ((type >= GL_SAMPLER_1D && type <= GL_SAMPLER_2D_RECT_SHADOW) ||
         type == GL_SAMPLER_2D_MULTISAMPLE ||
         type == GL_SAMPLER_CUBE_MAP_ARRAY)
     {   //this here is a texture
@@ -827,8 +785,8 @@ GLint LLGLSLShader::mapUniformTextureChannel(GLint location, GLenum type, GLint
                 channel[i] = mActiveTextureChannels++;
             }
             glUniform1iv(location, size, channel);
-            LL_DEBUGS("ShaderUniform") << "Assigned to texture channel " << 
-                (mActiveTextureChannels-size) << " through " << (mActiveTextureChannels-1) << LL_ENDL;
+            LL_DEBUGS("ShaderUniform") << "Assigned to texture channel " <<
+                (mActiveTextureChannels - size) << " through " << (mActiveTextureChannels - 1) << LL_ENDL;
         }
 
         llassert(mActiveTextureChannels <= 32); // too many textures (probably)
@@ -837,102 +795,102 @@ GLint LLGLSLShader::mapUniformTextureChannel(GLint location, GLenum type, GLint
     return -1;
 }
 
-BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
+BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString>* uniforms)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
     BOOL res = TRUE;
 
-	mTotalUniformSize = 0;
-	mActiveTextureChannels = 0;
-	mUniform.clear();
-	mUniformMap.clear();
-	mUniformNameMap.clear();
-	mTexture.clear();
-	mValue.clear();
-	//initialize arrays
-	U32 numUniforms = (uniforms == NULL) ? 0 : uniforms->size();
-	mUniform.resize(numUniforms + LLShaderMgr::instance()->mReservedUniforms.size(), -1);
-	mTexture.resize(numUniforms + LLShaderMgr::instance()->mReservedUniforms.size(), -1);
-
-	bind();
-
-	//get the number of active uniforms
-	GLint activeCount;
+    mTotalUniformSize = 0;
+    mActiveTextureChannels = 0;
+    mUniform.clear();
+    mUniformMap.clear();
+    mUniformNameMap.clear();
+    mTexture.clear();
+    mValue.clear();
+    //initialize arrays
+    U32 numUniforms = (uniforms == NULL) ? 0 : uniforms->size();
+    mUniform.resize(numUniforms + LLShaderMgr::instance()->mReservedUniforms.size(), -1);
+    mTexture.resize(numUniforms + LLShaderMgr::instance()->mReservedUniforms.size(), -1);
+
+    bind();
+
+    //get the number of active uniforms
+    GLint activeCount;
     glGetProgramiv(mProgramObject, GL_ACTIVE_UNIFORMS, &activeCount);
 
-	//........................................................................................................................................
-	//........................................................................................
+    //........................................................................................................................................
+    //........................................................................................
 
-	/*
-	EXPLANATION:
-	This is part of code is temporary because as the final result the mapUniform() should be rewrited.
-	But it's a huge a volume of work which is need to be a more carefully performed for avoid possible
-	regression's (i.e. it should be formalized a separate ticket in JIRA).
+    /*
+    EXPLANATION:
+    This is part of code is temporary because as the final result the mapUniform() should be rewrited.
+    But it's a huge a volume of work which is need to be a more carefully performed for avoid possible
+    regression's (i.e. it should be formalized a separate ticket in JIRA).
 
-	RESON:
-	The reason of this code is that SL engine is very sensitive to fact that "diffuseMap" should be appear
-	first as uniform parameter which is should get 0-"texture channel" index (see mapUniformTextureChannel() and mActiveTextureChannels)
-	it influence to which is texture matrix will be updated during rendering.
+    RESON:
+    The reason of this code is that SL engine is very sensitive to fact that "diffuseMap" should be appear
+    first as uniform parameter which is should get 0-"texture channel" index (see mapUniformTextureChannel() and mActiveTextureChannels)
+    it influence to which is texture matrix will be updated during rendering.
 
-	But, order of indexe's of uniform variables is not defined and GLSL compiler can change it as want
-	, even if the "diffuseMap" will be appear and use first in shader code.
+    But, order of indexe's of uniform variables is not defined and GLSL compiler can change it as want
+    , even if the "diffuseMap" will be appear and use first in shader code.
 
-	As example where this situation appear see: "Deferred Material Shader 28/29/30/31"
-	And tickets: MAINT-4165, MAINT-4839, MAINT-3568, MAINT-6437
+    As example where this situation appear see: "Deferred Material Shader 28/29/30/31"
+    And tickets: MAINT-4165, MAINT-4839, MAINT-3568, MAINT-6437
 
     --- davep TODO -- pretty sure the entire block here is superstitious and that the uniform index has nothing to do with the texture channel
                 texture channel should follow the uniform VALUE
-	*/
+    */
 
 
-	S32 diffuseMap = glGetUniformLocation(mProgramObject, "diffuseMap");
-	S32 specularMap = glGetUniformLocation(mProgramObject, "specularMap");
-	S32 bumpMap = glGetUniformLocation(mProgramObject, "bumpMap");
+    S32 diffuseMap = glGetUniformLocation(mProgramObject, "diffuseMap");
+    S32 specularMap = glGetUniformLocation(mProgramObject, "specularMap");
+    S32 bumpMap = glGetUniformLocation(mProgramObject, "bumpMap");
     S32 altDiffuseMap = glGetUniformLocation(mProgramObject, "altDiffuseMap");
-	S32 environmentMap = glGetUniformLocation(mProgramObject, "environmentMap");
+    S32 environmentMap = glGetUniformLocation(mProgramObject, "environmentMap");
     S32 reflectionMap = glGetUniformLocation(mProgramObject, "reflectionMap");
 
-	std::set<S32> skip_index;
+    std::set<S32> skip_index;
 
-	if (-1 != diffuseMap && (-1 != specularMap || -1 != bumpMap || -1 != environmentMap || -1 != altDiffuseMap))
-	{
-		GLenum type;
-		GLsizei length;
-		GLint size = -1;
-		char name[1024];
+    if (-1 != diffuseMap && (-1 != specularMap || -1 != bumpMap || -1 != environmentMap || -1 != altDiffuseMap))
+    {
+        GLenum type;
+        GLsizei length;
+        GLint size = -1;
+        char name[1024];
 
-		diffuseMap = altDiffuseMap = specularMap = bumpMap = environmentMap = -1;
+        diffuseMap = altDiffuseMap = specularMap = bumpMap = environmentMap = -1;
 
-		for (S32 i = 0; i < activeCount; i++)
-		{
-			name[0] = '\0';
+        for (S32 i = 0; i < activeCount; i++)
+        {
+            name[0] = '\0';
 
-            glGetActiveUniform(mProgramObject, i, 1024, &length, &size, &type, (GLchar *)name);
+            glGetActiveUniform(mProgramObject, i, 1024, &length, &size, &type, (GLchar*)name);
 
-			if (-1 == diffuseMap && std::string(name) == "diffuseMap")
-			{
-				diffuseMap = i;
-				continue;
-			}
+            if (-1 == diffuseMap && std::string(name) == "diffuseMap")
+            {
+                diffuseMap = i;
+                continue;
+            }
 
-			if (-1 == specularMap && std::string(name) == "specularMap")
-			{
-				specularMap = i;
-				continue;
-			}
+            if (-1 == specularMap && std::string(name) == "specularMap")
+            {
+                specularMap = i;
+                continue;
+            }
 
-			if (-1 == bumpMap && std::string(name) == "bumpMap")
-			{
-				bumpMap = i;
-				continue;
-			}
+            if (-1 == bumpMap && std::string(name) == "bumpMap")
+            {
+                bumpMap = i;
+                continue;
+            }
 
-			if (-1 == environmentMap && std::string(name) == "environmentMap")
-			{
-				environmentMap = i;
-				continue;
-			}
+            if (-1 == environmentMap && std::string(name) == "environmentMap")
+            {
+                environmentMap = i;
+                continue;
+            }
 
             if (-1 == reflectionMap && std::string(name) == "reflectionMap")
             {
@@ -941,55 +899,55 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
             }
 
             if (-1 == altDiffuseMap && std::string(name) == "altDiffuseMap")
-			{
-				altDiffuseMap = i;
-				continue;
-			}
-		}
-
-		bool specularDiff = specularMap < diffuseMap && -1 != specularMap;
-		bool bumpLessDiff = bumpMap < diffuseMap && -1 != bumpMap;
-		bool envLessDiff = environmentMap < diffuseMap && -1 != environmentMap;
+            {
+                altDiffuseMap = i;
+                continue;
+            }
+        }
+
+        bool specularDiff = specularMap < diffuseMap && -1 != specularMap;
+        bool bumpLessDiff = bumpMap < diffuseMap && -1 != bumpMap;
+        bool envLessDiff = environmentMap < diffuseMap && -1 != environmentMap;
         bool refLessDiff = reflectionMap < diffuseMap && -1 != reflectionMap;
 
-		if (specularDiff || bumpLessDiff || envLessDiff || refLessDiff)
-		{
-			mapUniform(diffuseMap, uniforms);
-			skip_index.insert(diffuseMap);
+        if (specularDiff || bumpLessDiff || envLessDiff || refLessDiff)
+        {
+            mapUniform(diffuseMap, uniforms);
+            skip_index.insert(diffuseMap);
 
-			if (-1 != specularMap) {
-				mapUniform(specularMap, uniforms);
-				skip_index.insert(specularMap);
-			}
+            if (-1 != specularMap) {
+                mapUniform(specularMap, uniforms);
+                skip_index.insert(specularMap);
+            }
 
-			if (-1 != bumpMap) {
-				mapUniform(bumpMap, uniforms);
-				skip_index.insert(bumpMap);
-			}
+            if (-1 != bumpMap) {
+                mapUniform(bumpMap, uniforms);
+                skip_index.insert(bumpMap);
+            }
 
-			if (-1 != environmentMap) {
-				mapUniform(environmentMap, uniforms);
-				skip_index.insert(environmentMap);
-			}
+            if (-1 != environmentMap) {
+                mapUniform(environmentMap, uniforms);
+                skip_index.insert(environmentMap);
+            }
 
             if (-1 != reflectionMap) {
                 mapUniform(reflectionMap, uniforms);
                 skip_index.insert(reflectionMap);
             }
-		}
-	}
+        }
+    }
 
-	//........................................................................................
+    //........................................................................................
 
-	for (S32 i = 0; i < activeCount; i++)
-	{
-		//........................................................................................
-		if (skip_index.end() != skip_index.find(i)) continue;
-		//........................................................................................
+    for (S32 i = 0; i < activeCount; i++)
+    {
+        //........................................................................................
+        if (skip_index.end() != skip_index.find(i)) continue;
+        //........................................................................................
 
-		mapUniform(i, uniforms);
-	}
-	//........................................................................................................................................
+        mapUniform(i, uniforms);
+    }
+    //........................................................................................................................................
 
     if (mFeatures.hasReflectionProbes) // Set up block binding, in a way supported by Apple (rather than binding = 1 in .glsl).
     {   // See slide 35 and more of https://docs.huihoo.com/apple/wwdc/2011/session_420__advances_in_opengl_for_mac_os_x_lion.pdf
@@ -1002,10 +960,10 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
             glUniformBlockBinding(mProgramObject, UBOBlockIndex, BLOCKBINDING);
         }
     }
-	unbind();
+    unbind();
 
-	LL_DEBUGS("ShaderUniform") << "Total Uniform Size: " << mTotalUniformSize << LL_ENDL;
-	return res;
+    LL_DEBUGS("ShaderUniform") << "Total Uniform Size: " << mTotalUniformSize << LL_ENDL;
+    return res;
 }
 
 
@@ -1031,10 +989,16 @@ void LLGLSLShader::bind()
 
     if (sCurBoundShader != mProgramObject)  // Don't re-bind current shader
     {
+        if (sCurBoundShaderPtr)
+        {
+            sCurBoundShaderPtr->readProfileQuery();
+        }
         LLVertexBuffer::unbind();
         glUseProgram(mProgramObject);
         sCurBoundShader = mProgramObject;
         sCurBoundShaderPtr = this;
+        placeProfileQuery();
+        LLVertexBuffer::setupClientArrays(mAttributeMask);
     }
 
     if (mUniformsDirty)
@@ -1060,8 +1024,11 @@ void LLGLSLShader::bind(bool rigged)
 void LLGLSLShader::unbind()
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
-
     gGL.flush();
+    if (sCurBoundShaderPtr)
+    {
+        sCurBoundShaderPtr->readProfileQuery();
+    }
     stop_glerror();
     LLVertexBuffer::unbind();
     glUseProgram(0);
@@ -1075,22 +1042,28 @@ void LLGLSLShader::bindNoShader(void)
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
     LLVertexBuffer::unbind();
+
+    if (sCurBoundShaderPtr)
+    {
+        sCurBoundShaderPtr->readProfileQuery();
+    }
+
     glUseProgram(0);
     sCurBoundShader = 0;
     sCurBoundShaderPtr = NULL;
 }
 
-S32 LLGLSLShader::bindTexture(const std::string &uniform, LLTexture *texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
+S32 LLGLSLShader::bindTexture(const std::string& uniform, LLTexture* texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
     S32 channel = 0;
     channel = getUniformLocation(uniform);
-    
+
     return bindTexture(channel, texture, mode, colorspace);
 }
 
-S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
+S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture* texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
@@ -1099,25 +1072,25 @@ S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextu
         LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
-    
+
     uniform = mTexture[uniform];
-    
+
     if (uniform > -1)
     {
         gGL.getTexUnit(uniform)->bindFast(texture);
         gGL.getTexUnit(uniform)->setTextureColorSpace(colorspace);
     }
-    
+
     return uniform;
 }
 
-S32 LLGLSLShader::unbindTexture(const std::string &uniform, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::unbindTexture(const std::string& uniform, LLTexUnit::eTextureType mode)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
 
     S32 channel = 0;
     channel = getUniformLocation(uniform);
-    
+
     return unbindTexture(channel);
 }
 
@@ -1130,14 +1103,14 @@ S32 LLGLSLShader::unbindTexture(S32 uniform, LLTexUnit::eTextureType mode)
         LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
-    
+
     uniform = mTexture[uniform];
-    
+
     if (uniform > -1)
     {
         gGL.getTexUnit(uniform)->unbindFast(mode);
     }
-    
+
     return uniform;
 }
 
@@ -1194,7 +1167,7 @@ void LLGLSLShader::uniform1i(U32 index, GLint x)
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     llassert(sCurBoundShaderPtr == this);
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1207,7 +1180,7 @@ void LLGLSLShader::uniform1i(U32 index, GLint x)
             if (iter == mValue.end() || iter->second.mV[0] != x)
             {
                 glUniform1i(mUniform[index], x);
-                mValue[mUniform[index]] = LLVector4(x,0.f,0.f,0.f);
+                mValue[mUniform[index]] = LLVector4(x, 0.f, 0.f, 0.f);
             }
         }
     }
@@ -1219,7 +1192,7 @@ void LLGLSLShader::uniform1f(U32 index, GLfloat x)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1232,7 +1205,7 @@ void LLGLSLShader::uniform1f(U32 index, GLfloat x)
             if (iter == mValue.end() || iter->second.mV[0] != x)
             {
                 glUniform1f(mUniform[index], x);
-                mValue[mUniform[index]] = LLVector4(x,0.f,0.f,0.f);
+                mValue[mUniform[index]] = LLVector4(x, 0.f, 0.f, 0.f);
             }
         }
     }
@@ -1254,7 +1227,7 @@ void LLGLSLShader::uniform2f(U32 index, GLfloat x, GLfloat y)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1264,8 +1237,8 @@ void LLGLSLShader::uniform2f(U32 index, GLfloat x, GLfloat y)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(x,y,0.f,0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec))
+            LLVector4 vec(x, y, 0.f, 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec))
             {
                 glUniform2f(mUniform[index], x, y);
                 mValue[mUniform[index]] = vec;
@@ -1280,7 +1253,7 @@ void LLGLSLShader::uniform3f(U32 index, GLfloat x, GLfloat y, GLfloat z)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1290,8 +1263,8 @@ void LLGLSLShader::uniform3f(U32 index, GLfloat x, GLfloat y, GLfloat z)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(x,y,z,0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec))
+            LLVector4 vec(x, y, z, 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec))
             {
                 glUniform3f(mUniform[index], x, y, z);
                 mValue[mUniform[index]] = vec;
@@ -1306,7 +1279,7 @@ void LLGLSLShader::uniform4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1316,8 +1289,8 @@ void LLGLSLShader::uniform4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(x,y,z,w);
-            if (iter == mValue.end() || shouldChange(iter->second,vec))
+            LLVector4 vec(x, y, z, w);
+            if (iter == mValue.end() || shouldChange(iter->second, vec))
             {
                 glUniform4f(mUniform[index], x, y, z, w);
                 mValue[mUniform[index]] = vec;
@@ -1332,7 +1305,7 @@ void LLGLSLShader::uniform1iv(U32 index, U32 count, const GLint* v)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1342,8 +1315,8 @@ void LLGLSLShader::uniform1iv(U32 index, U32 count, const GLint* v)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(v[0],0.f,0.f,0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+            LLVector4 vec(v[0], 0.f, 0.f, 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
             {
                 glUniform1iv(mUniform[index], count, v);
                 mValue[mUniform[index]] = vec;
@@ -1385,7 +1358,7 @@ void LLGLSLShader::uniform1fv(U32 index, U32 count, const GLfloat* v)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1395,8 +1368,8 @@ void LLGLSLShader::uniform1fv(U32 index, U32 count, const GLfloat* v)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(v[0],0.f,0.f,0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+            LLVector4 vec(v[0], 0.f, 0.f, 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
             {
                 glUniform1fv(mUniform[index], count, v);
                 mValue[mUniform[index]] = vec;
@@ -1411,7 +1384,7 @@ void LLGLSLShader::uniform2fv(U32 index, U32 count, const GLfloat* v)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1421,8 +1394,8 @@ void LLGLSLShader::uniform2fv(U32 index, U32 count, const GLfloat* v)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(v[0],v[1],0.f,0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+            LLVector4 vec(v[0], v[1], 0.f, 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
             {
                 glUniform2fv(mUniform[index], count, v);
                 mValue[mUniform[index]] = vec;
@@ -1437,7 +1410,7 @@ void LLGLSLShader::uniform3fv(U32 index, U32 count, const GLfloat* v)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1447,8 +1420,8 @@ void LLGLSLShader::uniform3fv(U32 index, U32 count, const GLfloat* v)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(v[0],v[1],v[2],0.f);
-            if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+            LLVector4 vec(v[0], v[1], v[2], 0.f);
+            if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
             {
                 glUniform3fv(mUniform[index], count, v);
                 mValue[mUniform[index]] = vec;
@@ -1463,7 +1436,7 @@ void LLGLSLShader::uniform4fv(U32 index, U32 count, const GLfloat* v)
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1473,8 +1446,8 @@ void LLGLSLShader::uniform4fv(U32 index, U32 count, const GLfloat* v)
         if (mUniform[index] >= 0)
         {
             const auto& iter = mValue.find(mUniform[index]);
-            LLVector4 vec(v[0],v[1],v[2],v[3]);
-            if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+            LLVector4 vec(v[0], v[1], v[2], v[3]);
+            if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
             {
                 LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
                 glUniform4fv(mUniform[index], count, v);
@@ -1484,13 +1457,13 @@ void LLGLSLShader::uniform4fv(U32 index, U32 count, const GLfloat* v)
     }
 }
 
-void LLGLSLShader::uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v)
+void LLGLSLShader::uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1504,13 +1477,13 @@ void LLGLSLShader::uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, c
     }
 }
 
-void LLGLSLShader::uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v)
+void LLGLSLShader::uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1524,33 +1497,33 @@ void LLGLSLShader::uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, c
     }
 }
 
-void LLGLSLShader::uniformMatrix3x4fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v)
+void LLGLSLShader::uniformMatrix3x4fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     llassert(sCurBoundShaderPtr == this);
 
-	if (mProgramObject)
-	{	
-		if (mUniform.size() <= index)
-		{
-			LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
-			return;
-		}
+    if (mProgramObject)
+    {
+        if (mUniform.size() <= index)
+        {
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
+            return;
+        }
 
-		if (mUniform[index] >= 0)
-		{
-			glUniformMatrix3x4fv(mUniform[index], count, transpose, v);
-		}
-	}
+        if (mUniform[index] >= 0)
+        {
+            glUniformMatrix3x4fv(mUniform[index], count, transpose, v);
+        }
+    }
 }
 
-void LLGLSLShader::uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v)
+void LLGLSLShader::uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     llassert(sCurBoundShaderPtr == this);
 
     if (mProgramObject)
-    {   
+    {
         if (mUniform.size() <= index)
         {
             LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
@@ -1626,12 +1599,12 @@ void LLGLSLShader::uniform1i(const LLStaticHashedString& uniform, GLint v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(v,0.f,0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec))
+        LLVector4 vec(v, 0.f, 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec))
         {
             glUniform1i(location, v);
             mValue[location] = vec;
@@ -1679,12 +1652,12 @@ void LLGLSLShader::uniform2i(const LLStaticHashedString& uniform, GLint i, GLint
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(i,j,0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec))
+        LLVector4 vec(i, j, 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec))
         {
             glUniform2i(location, i, j);
             mValue[location] = vec;
@@ -1697,12 +1670,12 @@ void LLGLSLShader::uniform1f(const LLStaticHashedString& uniform, GLfloat v)
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(v,0.f,0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec))
+        LLVector4 vec(v, 0.f, 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec))
         {
             glUniform1f(location, v);
             mValue[location] = vec;
@@ -1714,14 +1687,14 @@ void LLGLSLShader::uniform2f(const LLStaticHashedString& uniform, GLfloat x, GLf
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(x,y,0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec))
+        LLVector4 vec(x, y, 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec))
         {
-            glUniform2f(location, x,y);
+            glUniform2f(location, x, y);
             mValue[location] = vec;
         }
     }
@@ -1732,14 +1705,14 @@ void LLGLSLShader::uniform3f(const LLStaticHashedString& uniform, GLfloat x, GLf
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(x,y,z,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec))
+        LLVector4 vec(x, y, z, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec))
         {
-            glUniform3f(location, x,y,z);
+            glUniform3f(location, x, y, z);
             mValue[location] = vec;
         }
     }
@@ -1753,8 +1726,8 @@ void LLGLSLShader::uniform1fv(const LLStaticHashedString& uniform, U32 count, co
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(v[0],0.f,0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+        LLVector4 vec(v[0], 0.f, 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
         {
             glUniform1fv(location, count, v);
             mValue[location] = vec;
@@ -1766,12 +1739,12 @@ void LLGLSLShader::uniform2fv(const LLStaticHashedString& uniform, U32 count, co
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(v[0],v[1],0.f,0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+        LLVector4 vec(v[0], v[1], 0.f, 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
         {
             glUniform2fv(location, count, v);
             mValue[location] = vec;
@@ -1783,12 +1756,12 @@ void LLGLSLShader::uniform3fv(const LLStaticHashedString& uniform, U32 count, co
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         const auto& iter = mValue.find(location);
-        LLVector4 vec(v[0],v[1],v[2],0.f);
-        if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+        LLVector4 vec(v[0], v[1], v[2], 0.f);
+        if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
         {
             glUniform3fv(location, count, v);
             mValue[location] = vec;
@@ -1805,7 +1778,7 @@ void LLGLSLShader::uniform4fv(const LLStaticHashedString& uniform, U32 count, co
     {
         LLVector4 vec(v);
         const auto& iter = mValue.find(location);
-        if (iter == mValue.end() || shouldChange(iter->second,vec) || count != 1)
+        if (iter == mValue.end() || shouldChange(iter->second, vec) || count != 1)
         {
             LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
             glUniform4fv(location, count, v);
@@ -1818,7 +1791,7 @@ void LLGLSLShader::uniformMatrix4fv(const LLStaticHashedString& uniform, U32 cou
 {
     LL_PROFILE_ZONE_SCOPED_CATEGORY_SHADER;
     GLint location = getUniformLocation(uniform);
-                
+
     if (location >= 0)
     {
         stop_glerror();
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index 23db1a8549..0522f78614 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -1,25 +1,25 @@
-/** 
+/**
  * @file llglslshader.h
  * @brief GLSL shader wrappers
  *
  * $LicenseInfo:firstyear=2001&license=viewerlgpl$
  * Second Life Viewer Source Code
  * Copyright (C) 2010, Linden Research, Inc.
- * 
+ *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation;
  * version 2.1 of the License only.
- * 
+ *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU Lesser General Public
  * License along with this library; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
- * 
+ *
  * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
  * $/LicenseInfo$
  */
@@ -35,36 +35,36 @@
 class LLShaderFeatures
 {
 public:
-	bool atmosphericHelpers;
-	bool calculatesLighting;
-	bool calculatesAtmospherics;
-	bool hasLighting; // implies no transport (it's possible to have neither though)
-	bool isAlphaLighting; // indicates lighting shaders need not be linked in (lighting performed directly in alpha shader to match deferred lighting functions)
-	bool isShiny;
-	bool isFullbright; // implies no lighting
-	bool isSpecular;
-	bool hasWaterFog; // implies no gamma
-	bool hasTransport; // implies no lighting (it's possible to have neither though)
-	bool hasSkinning;	
-	bool hasObjectSkinning;
-	bool hasAtmospherics;
-	bool hasGamma;
+    bool atmosphericHelpers;
+    bool calculatesLighting;
+    bool calculatesAtmospherics;
+    bool hasLighting; // implies no transport (it's possible to have neither though)
+    bool isAlphaLighting; // indicates lighting shaders need not be linked in (lighting performed directly in alpha shader to match deferred lighting functions)
+    bool isShiny;
+    bool isFullbright; // implies no lighting
+    bool isSpecular;
+    bool hasWaterFog; // implies no gamma
+    bool hasTransport; // implies no lighting (it's possible to have neither though)
+    bool hasSkinning;
+    bool hasObjectSkinning;
+    bool hasAtmospherics;
+    bool hasGamma;
     bool hasShadows;
     bool hasAmbientOcclusion;
-	bool hasSrgb;
+    bool hasSrgb;
     bool encodesNormal; // include: shaders\class1\environment\encodeNormF.glsl
     bool isDeferred;
     bool hasScreenSpaceReflections;
     bool hasIndirect;
-	S32 mIndexedTextureChannels;
-	bool disableTextureIndex;
-	bool hasAlphaMask;
+    S32 mIndexedTextureChannels;
+    bool disableTextureIndex;
+    bool hasAlphaMask;
     bool hasReflectionProbes = false;
-	bool attachNothing;
+    bool attachNothing;
 
-	// char numLights;
-	
-	LLShaderFeatures();
+    // char numLights;
+
+    LLShaderFeatures();
 };
 
 // ============= Structure for caching shader uniforms ===============
@@ -108,7 +108,7 @@ public:
     {
         mVectors.push_back({ index, value });
     }
-    
+
     void uniform4fv(S32 index, const F32* value)
     {
         mVectors.push_back({ index, LLVector4(value) });
@@ -125,7 +125,7 @@ public:
     }
 
     void apply(LLGLSLShader* shader);
-   
+
 
     std::vector<IntSetting> mIntegers;
     std::vector<FloatSetting> mFloats;
@@ -138,184 +138,182 @@ public:
     // NOTE: Keep gShaderConsts and LLGLSLShader::ShaderConsts_e in sync!
     enum eShaderConsts
     {
-          SHADER_CONST_CLOUD_MOON_DEPTH
+        SHADER_CONST_CLOUD_MOON_DEPTH
         , SHADER_CONST_STAR_DEPTH
         , NUM_SHADER_CONSTS
     };
 
     // enum primarily used to control application sky settings uniforms
-	typedef enum 
-	{
-		SG_DEFAULT = 0,  // not sky or water specific
-		SG_SKY,  //
-		SG_WATER,
+    typedef enum
+    {
+        SG_DEFAULT = 0,  // not sky or water specific
+        SG_SKY,  //
+        SG_WATER,
         SG_ANY,
         SG_COUNT
-	} eGroup;
-	
-	static std::set<LLGLSLShader*> sInstances;
-	static bool sProfileEnabled;
-
-	LLGLSLShader();
-	~LLGLSLShader();
-
-	static GLuint sCurBoundShader;
-	static LLGLSLShader* sCurBoundShaderPtr;
-	static S32 sIndexedTextureChannels;
-
-	static void initProfile();
-	static void finishProfile(bool emit_report = true);
-
-	static void startProfile();
-	static void stopProfile(U32 count, U32 mode);
-
-	void unload();
-	void clearStats();
-	void dumpStats();
-	void placeProfileQuery();
-	void readProfileQuery(U32 count, U32 mode);
-
-	BOOL createShader(std::vector<LLStaticHashedString> * attributes,
-						std::vector<LLStaticHashedString> * uniforms,
-						U32 varying_count = 0,
-						const char** varyings = NULL);
+    } eGroup;
+
+    static std::set<LLGLSLShader*> sInstances;
+    static bool sProfileEnabled;
+
+    LLGLSLShader();
+    ~LLGLSLShader();
+
+    static GLuint sCurBoundShader;
+    static LLGLSLShader* sCurBoundShaderPtr;
+    static S32 sIndexedTextureChannels;
+
+    static void initProfile();
+    static void finishProfile(bool emit_report = true);
+
+    static void startProfile();
+    static void stopProfile();
+
+    void unload();
+    void clearStats();
+    void dumpStats();
+    void placeProfileQuery();
+    void readProfileQuery();
+
+    BOOL createShader(std::vector<LLStaticHashedString>* attributes,
+        std::vector<LLStaticHashedString>* uniforms,
+        U32 varying_count = 0,
+        const char** varyings = NULL);
     BOOL attachFragmentObject(std::string object);
     BOOL attachVertexObject(std::string object);
-	void attachObject(GLuint object);
-	void attachObjects(GLuint* objects = NULL, S32 count = 0);
-	BOOL mapAttributes(const std::vector<LLStaticHashedString> * attributes);
-	BOOL mapUniforms(const std::vector<LLStaticHashedString> *);
-	void mapUniform(GLint index, const std::vector<LLStaticHashedString> *);
-	void uniform1i(U32 index, GLint i);
-	void uniform1f(U32 index, GLfloat v);
+    void attachObject(GLuint object);
+    void attachObjects(GLuint* objects = NULL, S32 count = 0);
+    BOOL mapAttributes(const std::vector<LLStaticHashedString>* attributes);
+    BOOL mapUniforms(const std::vector<LLStaticHashedString>*);
+    void mapUniform(GLint index, const std::vector<LLStaticHashedString>*);
+    void uniform1i(U32 index, GLint i);
+    void uniform1f(U32 index, GLfloat v);
     void fastUniform1f(U32 index, GLfloat v);
-	void uniform2f(U32 index, GLfloat x, GLfloat y);
-	void uniform3f(U32 index, GLfloat x, GLfloat y, GLfloat z);
-	void uniform4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-	void uniform1iv(U32 index, U32 count, const GLint* i);
+    void uniform2f(U32 index, GLfloat x, GLfloat y);
+    void uniform3f(U32 index, GLfloat x, GLfloat y, GLfloat z);
+    void uniform4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+    void uniform1iv(U32 index, U32 count, const GLint* i);
     void uniform4iv(U32 index, U32 count, const GLint* i);
-	void uniform1fv(U32 index, U32 count, const GLfloat* v);
-	void uniform2fv(U32 index, U32 count, const GLfloat* v);
-	void uniform3fv(U32 index, U32 count, const GLfloat* v);
-	void uniform4fv(U32 index, U32 count, const GLfloat* v);
-	void uniform2i(const LLStaticHashedString& uniform, GLint i, GLint j);
-	void uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v);
-	void uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v);
-	void uniformMatrix3x4fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v);
-	void uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, const GLfloat *v);
-	void uniform1i(const LLStaticHashedString& uniform, GLint i);
+    void uniform1fv(U32 index, U32 count, const GLfloat* v);
+    void uniform2fv(U32 index, U32 count, const GLfloat* v);
+    void uniform3fv(U32 index, U32 count, const GLfloat* v);
+    void uniform4fv(U32 index, U32 count, const GLfloat* v);
+    void uniform2i(const LLStaticHashedString& uniform, GLint i, GLint j);
+    void uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v);
+    void uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v);
+    void uniformMatrix3x4fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v);
+    void uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, const GLfloat* v);
+    void uniform1i(const LLStaticHashedString& uniform, GLint i);
     void uniform1iv(const LLStaticHashedString& uniform, U32 count, const GLint* v);
     void uniform4iv(const LLStaticHashedString& uniform, U32 count, const GLint* v);
-	void uniform1f(const LLStaticHashedString& uniform, GLfloat v);
-	void uniform2f(const LLStaticHashedString& uniform, GLfloat x, GLfloat y);
-	void uniform3f(const LLStaticHashedString& uniform, GLfloat x, GLfloat y, GLfloat z);
-	void uniform1fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
-	void uniform2fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
-	void uniform3fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
-	void uniform4fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
-	void uniformMatrix4fv(const LLStaticHashedString& uniform, U32 count, GLboolean transpose, const GLfloat *v);
-
-	void setMinimumAlpha(F32 minimum);
-
-	void vertexAttrib4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
-	void vertexAttrib4fv(U32 index, GLfloat* v);
-	
-	//GLint getUniformLocation(const std::string& uniform);
-	GLint getUniformLocation(const LLStaticHashedString& uniform);	
-	GLint getUniformLocation(U32 index);
-
-	GLint getAttribLocation(U32 attrib);
-	GLint mapUniformTextureChannel(GLint location, GLenum type, GLint size);
-	
+    void uniform1f(const LLStaticHashedString& uniform, GLfloat v);
+    void uniform2f(const LLStaticHashedString& uniform, GLfloat x, GLfloat y);
+    void uniform3f(const LLStaticHashedString& uniform, GLfloat x, GLfloat y, GLfloat z);
+    void uniform1fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
+    void uniform2fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
+    void uniform3fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
+    void uniform4fv(const LLStaticHashedString& uniform, U32 count, const GLfloat* v);
+    void uniformMatrix4fv(const LLStaticHashedString& uniform, U32 count, GLboolean transpose, const GLfloat* v);
+
+    void setMinimumAlpha(F32 minimum);
+
+    void vertexAttrib4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat w);
+    void vertexAttrib4fv(U32 index, GLfloat* v);
+
+    //GLint getUniformLocation(const std::string& uniform);
+    GLint getUniformLocation(const LLStaticHashedString& uniform);
+    GLint getUniformLocation(U32 index);
+
+    GLint getAttribLocation(U32 attrib);
+    GLint mapUniformTextureChannel(GLint location, GLenum type, GLint size);
+
     void clearPermutations();
-	void addPermutation(std::string name, std::string value);
-	void removePermutation(std::string name);
-	
-    void addConstant( const LLGLSLShader::eShaderConsts shader_const );
-
-	//enable/disable texture channel for specified uniform
-	//if given texture uniform is active in the shader, 
-	//the corresponding channel will be active upon return
-	//returns channel texture is enabled in from [0-MAX)
-	S32 enableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
+    void addPermutation(std::string name, std::string value);
+    void removePermutation(std::string name);
+
+    void addConstant(const LLGLSLShader::eShaderConsts shader_const);
+
+    //enable/disable texture channel for specified uniform
+    //if given texture uniform is active in the shader, 
+    //the corresponding channel will be active upon return
+    //returns channel texture is enabled in from [0-MAX)
+    S32 enableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
     S32 disableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
-	
-	// bindTexture returns the texture unit we've bound the texture to.
-	// You can reuse the return value to unbind a texture when required.
-	S32 bindTexture(const std::string& uniform, LLTexture *texture, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
-	S32 bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
-	S32 unbindTexture(const std::string& uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
-	S32 unbindTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
-	
+
+    // bindTexture returns the texture unit we've bound the texture to.
+    // You can reuse the return value to unbind a texture when required.
+    S32 bindTexture(const std::string& uniform, LLTexture* texture, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
+    S32 bindTexture(S32 uniform, LLTexture* texture, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE, LLTexUnit::eTextureColorSpace space = LLTexUnit::TCS_LINEAR);
+    S32 unbindTexture(const std::string& uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
+    S32 unbindTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
+
     BOOL link(BOOL suppress_errors = FALSE);
-	void bind();
+    void bind();
     //helper to conditionally bind mRiggedVariant instead of this
     void bind(bool rigged);
-	void unbind();
+    void unbind();
 
-	// Unbinds any previously bound shader by explicitly binding no shader.
-	static void bindNoShader(void);
+    // Unbinds any previously bound shader by explicitly binding no shader.
+    static void bindNoShader(void);
 
-	U32 mMatHash[LLRender::NUM_MATRIX_MODES];
-	U32 mLightHash;
+    U32 mMatHash[LLRender::NUM_MATRIX_MODES];
+    U32 mLightHash;
 
-	GLuint mProgramObject;
+    GLuint mProgramObject;
 #if LL_RELEASE_WITH_DEBUG_INFO
-	struct attr_name
-	{
-		GLint loc;
-		const char *name;
-		void operator = (GLint _loc) { loc = _loc; }
-		operator GLint () { return loc; }
-	};
-	std::vector<attr_name> mAttribute; //lookup table of attribute enum to attribute channel
+    struct attr_name
+    {
+        GLint loc;
+        const char* name;
+        void operator = (GLint _loc) { loc = _loc; }
+        operator GLint () { return loc; }
+    };
+    std::vector<attr_name> mAttribute; //lookup table of attribute enum to attribute channel
 #else
-	std::vector<GLint> mAttribute; //lookup table of attribute enum to attribute channel
+    std::vector<GLint> mAttribute; //lookup table of attribute enum to attribute channel
 #endif
-	U32 mAttributeMask;  //mask of which reserved attributes are set (lines up with LLVertexBuffer::getTypeMask())
-	std::vector<GLint> mUniform;   //lookup table of uniform enum to uniform location
-	LLStaticStringTable<GLint> mUniformMap; //lookup map of uniform name to uniform location
+    U32 mAttributeMask;  //mask of which reserved attributes are set (lines up with LLVertexBuffer::getTypeMask())
+    std::vector<GLint> mUniform;   //lookup table of uniform enum to uniform location
+    LLStaticStringTable<GLint> mUniformMap; //lookup map of uniform name to uniform location
     typedef std::unordered_map<GLint, std::string> uniform_name_map_t;
     typedef std::unordered_map<GLint, LLVector4> uniform_value_map_t;
     uniform_name_map_t mUniformNameMap; //lookup map of uniform location to uniform name
-	uniform_value_map_t mValue; //lookup map of uniform location to last known value
-	std::vector<GLint> mTexture;
-	S32 mTotalUniformSize;
-	S32 mActiveTextureChannels;
-	S32 mShaderLevel;
-	S32 mShaderGroup; // see LLGLSLShader::eGroup
-	BOOL mUniformsDirty;
-	LLShaderFeatures mFeatures;
-	std::vector< std::pair< std::string, GLenum > > mShaderFiles;
-	std::string mName;
+    uniform_value_map_t mValue; //lookup map of uniform location to last known value
+    std::vector<GLint> mTexture;
+    S32 mTotalUniformSize;
+    S32 mActiveTextureChannels;
+    S32 mShaderLevel;
+    S32 mShaderGroup; // see LLGLSLShader::eGroup
+    BOOL mUniformsDirty;
+    LLShaderFeatures mFeatures;
+    std::vector< std::pair< std::string, GLenum > > mShaderFiles;
+    std::string mName;
     typedef std::unordered_map<std::string, std::string> defines_map_t;
-	defines_map_t mDefines;
-
-	//statistcis for profiling shader performance
-	U32 mTimerQuery;
-	U32 mSamplesQuery;
-	U64 mTimeElapsed;
-	static U64 sTotalTimeElapsed;
-	U32 mTrianglesDrawn;
-	static U32 sTotalTrianglesDrawn;
-	U64 mSamplesDrawn;
-	static U64 sTotalSamplesDrawn;
-	U32 mDrawCalls;
-	static U32 sTotalDrawCalls;
-
-	bool mTextureStateFetched;
-	std::vector<U32> mTextureMagFilter;
-	std::vector<U32> mTextureMinFilter;
+    defines_map_t mDefines;
+
+    //statistics for profiling shader performance
+    U32 mTimerQuery;
+    U32 mSamplesQuery;
+    U32 mPrimitivesQuery;
+
+    U64 mTimeElapsed;
+    static U64 sTotalTimeElapsed;
+    U32 mTrianglesDrawn;
+    static U32 sTotalTrianglesDrawn;
+    U64 mSamplesDrawn;
+    static U64 sTotalSamplesDrawn;
+    U32 mBinds;
+    static U32 sTotalBinds;
 
     // this pointer should be set to whichever shader represents this shader's rigged variant
     LLGLSLShader* mRiggedVariant = nullptr;
 
-	#ifdef LL_PROFILER_ENABLE_RENDER_DOC
+#ifdef LL_PROFILER_ENABLE_RENDER_DOC
     void setLabel(const char* label);
-	#endif
+#endif
 
 private:
-	void unloadInternal();
+    void unloadInternal();
 };
 
 //UI shader (declared here so llui_libtest will link properly)
diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 57be21cf6e..0dce5ed3a3 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -561,10 +561,8 @@ void LLVertexBuffer::drawRange(U32 mode, U32 start, U32 end, U32 count, U32 indi
 	U16* idx = ((U16*) getIndicesPointer())+indices_offset;
 
 	stop_glerror();
-	LLGLSLShader::startProfile();
 	glDrawRangeElements(sGLMode[mode], start, end, count, GL_UNSIGNED_SHORT, 
 		idx);
-	LLGLSLShader::stopProfile(count, mode);
 	stop_glerror();
 }
 
@@ -608,10 +606,8 @@ void LLVertexBuffer::draw(U32 mode, U32 count, U32 indices_offset) const
 	}
 
 	stop_glerror();
-	LLGLSLShader::startProfile();
-    glDrawElements(sGLMode[mode], count, GL_UNSIGNED_SHORT,
+	glDrawElements(sGLMode[mode], count, GL_UNSIGNED_SHORT,
 		((U16*) getIndicesPointer()) + indices_offset);
-	LLGLSLShader::stopProfile(count, mode);
 	stop_glerror();
 }
 
@@ -642,13 +638,7 @@ void LLVertexBuffer::drawArrays(U32 mode, U32 first, U32 count) const
     }
 #endif
 
-    LLGLSLShader::startProfile();
-    {
-            glDrawArrays(sGLMode[mode], first, count);
-    }
-    LLGLSLShader::stopProfile(count, mode);
-
-    stop_glerror();
+    glDrawArrays(sGLMode[mode], first, count);
 }
 
 //static
@@ -1347,7 +1337,6 @@ static void flush_vbo(GLenum target, S32 start, S32 end, void* data)
         for (S32 i = start; i < end; i += block_size)
         {
             LL_PROFILE_ZONE_NAMED_CATEGORY_VERTEX("glBufferSubData block");
-            LL_PROFILE_GPU_ZONE("glBufferSubData");
             S32 tend = llmin(i + block_size, end);
             glBufferSubData(target, i, tend - i, (U8*) data + (i-start));
         }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaMaskShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaMaskShadowF.glsl
index c2372fcbc0..26d23aec79 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaMaskShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaMaskShadowF.glsl
@@ -57,8 +57,4 @@ void main()
 	}
 
 	frag_color = vec4(1,1,1,1);
-
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaShadowF.glsl
index d0a049d372..57fd620cae 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/attachmentAlphaShadowF.glsl
@@ -60,9 +60,4 @@ void main()
 	}
 
 	frag_color = vec4(1,1,1,1);
-
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
-
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaMaskShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaMaskShadowF.glsl
index f231213ac8..407ee39fbb 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaMaskShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaMaskShadowF.glsl
@@ -58,8 +58,4 @@ void main()
 	}
 
 	frag_color = vec4(1,1,1,1);
-	
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaShadowF.glsl
index 0e66c722b6..cfebc7bc66 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarAlphaShadowF.glsl
@@ -60,9 +60,4 @@ void main()
 	}
 
 	frag_color = vec4(1,1,1,1);
-	
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
-
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
index 50020a50d8..57c4bafd79 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/avatarShadowF.glsl
@@ -40,9 +40,5 @@ VARYING vec4 post_pos;
 void main() 
 {
 	frag_color = vec4(1,1,1,1);
-
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
index 06ebeb8281..68e9addc1b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaMaskF.glsl
@@ -69,8 +69,4 @@ void main()
 #endif
 
 	frag_color = vec4(1,1,1,1);
-	
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
index 1ea96918bb..406a7ef3b3 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowF.glsl
@@ -25,20 +25,9 @@
  
 /*[EXTRA_CODE_HERE]*/
 
-#ifdef DEFINE_GL_FRAGCOLOR
 out vec4 frag_color;
-#else
-#define frag_color gl_FragColor
-#endif
-
-VARYING vec4 post_pos;
 
 void main() 
 {
 	frag_color = vec4(1,1,1,1);
-	
-#if !defined(DEPTH_CLAMP)
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
-#endif
-
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
index 72bd0f0f34..e83cda89ef 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowV.glsl
@@ -25,21 +25,9 @@
 
 uniform mat4 modelview_projection_matrix;
 
-ATTRIBUTE vec3 position;
-
-VARYING vec4 post_pos;
+in vec3 position;
 
 void main()
 {
-	//transform vertex
-	vec4 pos = modelview_projection_matrix*vec4(position.xyz, 1.0);
-	
-	post_pos = pos;
-
-#if !defined(DEPTH_CLAMP)
-	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
-#else
-	gl_Position = pos;
-#endif
-
+	gl_Position = modelview_projection_matrix*vec4(position.xyz, 1.0);
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl b/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
index e34d75ba1d..802179a401 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/treeShadowF.glsl
@@ -49,5 +49,4 @@ void main()
 
 	frag_color = vec4(1,1,1,1);
 	
-	gl_FragDepth = max(post_pos.z/post_pos.w*0.5+0.5, 0.0);
 }
diff --git a/indra/newview/pipeline.cpp b/indra/newview/pipeline.cpp
index 6ac059df91..5f90fae25f 100644
--- a/indra/newview/pipeline.cpp
+++ b/indra/newview/pipeline.cpp
@@ -9470,7 +9470,9 @@ void LLPipeline::renderShadow(glh::matrix4f& view, glh::matrix4f& proj, LLCamera
     LLGLEnable cull(GL_CULL_FACE);
 
     //enable depth clamping if available
-    //LLGLEnable depth_clamp(GL_DEPTH_CLAMP);
+    LLGLEnable depth_clamp(GL_DEPTH_CLAMP);
+
+    LLGLDepthTest depth_test(GL_TRUE, GL_TRUE, GL_LESS);
 
     if (use_shader)
     {
@@ -9513,15 +9515,8 @@ void LLPipeline::renderShadow(glh::matrix4f& view, glh::matrix4f& proj, LLCamera
     for (int j = 0; j < 2; ++j) // 0 -- static, 1 -- rigged
     {
         bool rigged = j == 1;
-        if (!use_shader)
-        { //occlusion program is general purpose depth-only no-textures
-            gOcclusionProgram.bind(rigged);
-        }
-        else
-        {
-            gDeferredShadowProgram.bind(rigged);
-            LLGLSLShader::sCurBoundShaderPtr->uniform1i(LLShaderMgr::SUN_UP_FACTOR, environment.getIsSunUp() ? 1 : 0);
-        }
+        gDeferredShadowProgram.bind(rigged);
+        LLGLSLShader::sCurBoundShaderPtr->uniform1i(LLShaderMgr::SUN_UP_FACTOR, environment.getIsSunUp() ? 1 : 0);
 
         gGL.diffuseColor4f(1, 1, 1, 1);
 
@@ -9555,10 +9550,6 @@ void LLPipeline::renderShadow(glh::matrix4f& view, glh::matrix4f& proj, LLCamera
         }
 
         gGL.getTexUnit(0)->enable(LLTexUnit::TT_TEXTURE);
-        if (!use_shader)
-        {
-            gOcclusionProgram.unbind();
-        }
     }
 
     if (occlude > 1)