Merge branch 'master' into DRTVWR-497

28 files changed, 1633 insertions, 515 deletions

diff --git a/indra/llrender/CMakeLists.txt b/indra/llrender/CMakeLists.txt
index 07a0d8c402..47e7ad915b 100644
--- a/indra/llrender/CMakeLists.txt
+++ b/indra/llrender/CMakeLists.txt
@@ -31,6 +31,7 @@ include_directories(SYSTEM
     )
 
 set(llrender_SOURCE_FILES
+    llatmosphere.cpp
     llcubemap.cpp
     llfontbitmapcache.cpp
     llfontfreetype.cpp
@@ -57,6 +58,7 @@ set(llrender_SOURCE_FILES
 set(llrender_HEADER_FILES
     CMakeLists.txt
 
+    llatmosphere.h
     llcubemap.h
     llfontgl.h
     llfontfreetype.h
@@ -78,6 +80,7 @@ set(llrender_HEADER_FILES
     llshadermgr.h
     lltexture.h
     lluiimage.h
+    lluiimage.inl
     llvertexbuffer.h
     llglcommonfunc.h
     )
diff --git a/indra/llrender/llatmosphere.cpp b/indra/llrender/llatmosphere.cpp
new file mode 100644
index 0000000000..ffc17c89f8
--- /dev/null
+++ b/indra/llrender/llatmosphere.cpp
@@ -0,0 +1,290 @@
+/** 
+ * @file llatmosphere.cpp
+ * @brief LLAtmosphere integration impl
+ *
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2018, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "linden_common.h"
+
+#include "llatmosphere.h"
+#include "llfasttimer.h"
+#include "llsys.h"
+#include "llglheaders.h"
+#include "llrender.h"
+#include "llshadermgr.h"
+#include "llglslshader.h"
+
+LLAtmosphere* gAtmosphere = nullptr;
+
+// Values from "Reference Solar Spectral Irradiance: ASTM G-173", ETR column
+// (see http://rredc.nrel.gov/solar/spectra/am1.5/ASTMG173/ASTMG173.html),
+// summed and averaged in each bin (e.g. the value for 360nm is the average
+// of the ASTM G-173 values for all wavelengths between 360 and 370nm).
+// Values in W.m^-2.
+const int kLambdaMin = 360;
+const int kLambdaMax = 830;
+const double kSolarIrradiance[48] = {
+    1.11776, 1.14259, 1.01249, 1.14716, 1.72765, 1.73054, 1.6887, 1.61253,
+    1.91198, 2.03474, 2.02042, 2.02212, 1.93377, 1.95809, 1.91686, 1.8298,
+    1.8685, 1.8931, 1.85149, 1.8504, 1.8341, 1.8345, 1.8147, 1.78158, 1.7533,
+    1.6965, 1.68194, 1.64654, 1.6048, 1.52143, 1.55622, 1.5113, 1.474, 1.4482,
+    1.41018, 1.36775, 1.34188, 1.31429, 1.28303, 1.26758, 1.2367, 1.2082,
+    1.18737, 1.14683, 1.12362, 1.1058, 1.07124, 1.04992
+};
+
+// Values from http://www.iup.uni-bremen.de/gruppen/molspec/databases/
+// referencespectra/o3spectra2011/index.html for 233K, summed and averaged in
+// each bin (e.g. the value for 360nm is the average of the original values
+// for all wavelengths between 360 and 370nm). Values in m^2.
+const double kOzoneCrossSection[48] = {
+    1.18e-27, 2.182e-28, 2.818e-28, 6.636e-28, 1.527e-27, 2.763e-27, 5.52e-27,
+    8.451e-27, 1.582e-26, 2.316e-26, 3.669e-26, 4.924e-26, 7.752e-26, 9.016e-26,
+    1.48e-25, 1.602e-25, 2.139e-25, 2.755e-25, 3.091e-25, 3.5e-25, 4.266e-25,
+    4.672e-25, 4.398e-25, 4.701e-25, 5.019e-25, 4.305e-25, 3.74e-25, 3.215e-25,
+    2.662e-25, 2.238e-25, 1.852e-25, 1.473e-25, 1.209e-25, 9.423e-26, 7.455e-26,
+    6.566e-26, 5.105e-26, 4.15e-26, 4.228e-26, 3.237e-26, 2.451e-26, 2.801e-26,
+    2.534e-26, 1.624e-26, 1.465e-26, 2.078e-26, 1.383e-26, 7.105e-27
+};
+
+// From https://en.wikipedia.org/wiki/Dobson_unit, in molecules.m^-2.
+const double kDobsonUnit = 2.687e20;
+// Maximum number density of ozone molecules, in m^-3 (computed so at to get
+// 300 Dobson units of ozone - for this we divide 300 DU by the integral of
+// the ozone density profile defined below, which is equal to 15km).
+const double kMaxOzoneNumberDensity = 300.0 * kDobsonUnit / 15000.0;
+const double kRayleigh = 1.24062e-6;
+const double kRayleighScaleHeight = 8000.0;
+const double kMieScaleHeight = 1200.0;
+const double kMieAngstromAlpha = 0.0;
+const double kMieAngstromBeta = 5.328e-3;
+const double kMieSingleScatteringAlbedo = 0.9;
+const double kGroundAlbedo = 0.1;
+
+AtmosphericModelSettings::AtmosphericModelSettings()
+    : m_skyBottomRadius(6360.0f)
+    , m_skyTopRadius(6420.0f)
+    , m_sunArcRadians(0.00045f)
+    , m_mieAnisotropy(0.8f)
+{
+    DensityLayer rayleigh_density(0.0, 1.0, -1.0 / kRayleighScaleHeight, 0.0, 0.0);
+    DensityLayer mie_density(0.0, 1.0, -1.0 / kMieScaleHeight, 0.0, 0.0);
+
+    m_rayleighProfile.push_back(rayleigh_density);
+    m_mieProfile.push_back(mie_density);
+
+    // Density profile increasing linearly from 0 to 1 between 10 and 25km, and
+    // decreasing linearly from 1 to 0 between 25 and 40km. This is an approximate
+    // profile from http://www.kln.ac.lk/science/Chemistry/Teaching_Resources/
+    // Documents/Introduction%20to%20atmospheric%20chemistry.pdf (page 10).
+    m_absorptionProfile.push_back(DensityLayer(25000.0, 0.0, 0.0, 1.0 / 15000.0, -2.0 / 3.0));
+    m_absorptionProfile.push_back(DensityLayer(0.0, 0.0, 0.0, -1.0 / 15000.0, 8.0 / 3.0));
+}
+
+AtmosphericModelSettings::AtmosphericModelSettings(
+    DensityProfile& rayleighProfile,
+    DensityProfile& mieProfile,
+    DensityProfile& absorptionProfile)
+: m_skyBottomRadius(6360.0f)
+, m_skyTopRadius(6420.0f)
+, m_rayleighProfile(rayleighProfile)
+, m_mieProfile(mieProfile)
+, m_absorptionProfile(absorptionProfile)
+, m_sunArcRadians(0.00045f)
+, m_mieAnisotropy(0.8f)
+{
+}
+
+AtmosphericModelSettings::AtmosphericModelSettings(
+    F32             skyBottomRadius,
+    F32             skyTopRadius,
+    DensityProfile& rayleighProfile,
+    DensityProfile& mieProfile,
+    DensityProfile& absorptionProfile,
+    F32             sunArcRadians,
+    F32             mieAniso)
+: m_skyBottomRadius(skyBottomRadius)
+, m_skyTopRadius(skyTopRadius)
+, m_rayleighProfile(rayleighProfile)
+, m_mieProfile(mieProfile)
+, m_absorptionProfile(absorptionProfile)
+, m_sunArcRadians(sunArcRadians)
+, m_mieAnisotropy(mieAniso)
+{
+}
+
+bool AtmosphericModelSettings::operator==(const AtmosphericModelSettings& rhs) const
+{
+    if (m_skyBottomRadius != rhs.m_skyBottomRadius)
+    {
+        return false;
+    }
+
+    if (m_skyTopRadius != rhs.m_skyTopRadius)
+    {
+        return false;
+    }
+
+    if (m_sunArcRadians != rhs.m_sunArcRadians)
+    {
+        return false;
+    }
+
+    if (m_mieAnisotropy != rhs.m_mieAnisotropy)
+    {
+        return false;
+    }
+
+    if (m_rayleighProfile != rhs.m_rayleighProfile)
+    {
+        return false;
+    }
+
+    if (m_mieProfile != rhs.m_mieProfile)
+    {
+        return false;
+    }
+
+    if (m_absorptionProfile != rhs.m_absorptionProfile)
+    {
+        return false;
+    }
+
+    return true;
+}
+
+void LLAtmosphere::initClass()
+{
+    if (!gAtmosphere)
+    { 
+        gAtmosphere = new LLAtmosphere; 
+    }
+}
+
+void LLAtmosphere::cleanupClass()
+{
+    if(gAtmosphere)
+    {
+        delete gAtmosphere;
+    }
+    gAtmosphere = NULL;
+}
+
+LLAtmosphere::LLAtmosphere()
+{
+    for (int l = kLambdaMin; l <= kLambdaMax; l += 10)
+    {
+        double lambda = static_cast<double>(l) * 1e-3;  // micro-meters
+        double mie    = kMieAngstromBeta / kMieScaleHeight * pow(lambda, -kMieAngstromAlpha);
+        m_wavelengths.push_back(l);
+        m_solar_irradiance.push_back(kSolarIrradiance[(l - kLambdaMin) / 10]);
+        m_rayleigh_scattering.push_back(kRayleigh * pow(lambda, -4));
+        m_mie_scattering.push_back(mie * kMieSingleScatteringAlbedo);
+        m_mie_extinction.push_back(mie);
+        m_absorption_extinction.push_back(kMaxOzoneNumberDensity * kOzoneCrossSection[(l - kLambdaMin) / 10]);
+        m_ground_albedo.push_back(kGroundAlbedo);
+    }
+
+    AtmosphericModelSettings defaults;
+    configureAtmosphericModel(defaults);
+}
+
+LLAtmosphere::~LLAtmosphere()
+{
+    // Cease referencing textures from atmosphere::model from our LLGLTextures wrappers for same.
+    if (m_transmittance)
+    {
+        m_transmittance->setTexName(0);
+    }
+
+    if (m_scattering)
+    {
+        m_scattering->setTexName(0);
+    }
+
+    if (m_mie_scatter_texture)
+    {
+        m_mie_scatter_texture->setTexName(0);
+    }
+}
+
+bool LLAtmosphere::configureAtmosphericModel(AtmosphericModelSettings& settings)
+{
+    // TBD
+    return true;
+}
+
+LLGLTexture* LLAtmosphere::getTransmittance()
+{
+    if (!m_transmittance)
+    {
+        m_transmittance  = new LLGLTexture;
+        m_transmittance->generateGLTexture();
+        m_transmittance->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+        m_transmittance->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+        m_transmittance->setExplicitFormat(GL_RGB32F_ARB, GL_RGB, GL_FLOAT);
+        m_transmittance->setTarget(GL_TEXTURE_2D, LLTexUnit::TT_TEXTURE);
+    }
+    return m_transmittance;
+}
+
+LLGLTexture* LLAtmosphere::getScattering()
+{
+    if (!m_scattering)
+    {
+        m_scattering = new LLGLTexture;
+        m_scattering->generateGLTexture();
+        m_scattering->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+        m_scattering->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+        m_scattering->setExplicitFormat(GL_RGB16F_ARB, GL_RGB, GL_FLOAT);
+        m_scattering->setTarget(GL_TEXTURE_3D, LLTexUnit::TT_TEXTURE_3D);
+    }
+    return m_scattering;
+}
+
+LLGLTexture* LLAtmosphere::getMieScattering()
+{
+    if (!m_mie_scatter_texture)
+    {
+        m_mie_scatter_texture = new LLGLTexture;
+        m_mie_scatter_texture->generateGLTexture();
+        m_mie_scatter_texture->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+        m_mie_scatter_texture->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+        m_mie_scatter_texture->setExplicitFormat(GL_RGB16F_ARB, GL_RGB, GL_FLOAT);
+        m_mie_scatter_texture->setTarget(GL_TEXTURE_3D, LLTexUnit::TT_TEXTURE_3D);
+    }
+    return m_mie_scatter_texture;
+}
+
+LLGLTexture* LLAtmosphere::getIlluminance()
+{
+    if (!m_illuminance)
+    {
+        m_illuminance = new LLGLTexture;
+        m_illuminance->generateGLTexture();
+        m_illuminance->setAddressMode(LLTexUnit::eTextureAddressMode::TAM_CLAMP);
+        m_illuminance->setFilteringOption(LLTexUnit::eTextureFilterOptions::TFO_BILINEAR);
+        m_illuminance->setExplicitFormat(GL_RGB32F_ARB, GL_RGB, GL_FLOAT);
+        m_illuminance->setTarget(GL_TEXTURE_2D, LLTexUnit::TT_TEXTURE);
+    }
+    return m_illuminance;
+}
diff --git a/indra/llrender/llatmosphere.h b/indra/llrender/llatmosphere.h
new file mode 100644
index 0000000000..572365d864
--- /dev/null
+++ b/indra/llrender/llatmosphere.h
@@ -0,0 +1,173 @@
+/** 
+ * @file llatmosphere.h
+ * @brief LLAtmosphere class
+ *
+ * $LicenseInfo:firstyear=2018&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2018, 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_ATMOSPHERE_H
+#define LL_ATMOSPHERE_H
+
+#include "llglheaders.h"
+#include "llgltexture.h"
+
+// An atmosphere layer of width 'width' (in m), and whose density is defined as
+//   'exp_term' * exp('exp_scale' * h) + 'linear_term' * h + 'constant_term',
+// clamped to [0,1], and where h is the altitude (in m). 'exp_term' and
+// 'constant_term' are unitless, while 'exp_scale' and 'linear_term' are in
+// m^-1.
+class DensityLayer {
+ public:
+  DensityLayer()
+    : width(0.0f)
+    , exp_term(0.0f)
+    , exp_scale(0.0f)
+    , linear_term(0.0f)
+    , constant_term(0.0f)
+  {
+  }
+
+  DensityLayer(float width, float exp_term, float exp_scale, float linear_term, float constant_term)
+    : width(width)
+    , exp_term(exp_term)
+    , exp_scale(exp_scale)
+    , linear_term(linear_term)
+    , constant_term(constant_term)
+  {
+  }
+
+  bool operator==(const DensityLayer& rhs) const
+  {
+      if (width != rhs.width)
+      {
+         return false;
+      }
+
+      if (exp_term != rhs.exp_term)
+      {
+         return false;
+      }
+
+      if (exp_scale != rhs.exp_scale)
+      {
+         return false;
+      }
+
+      if (linear_term != rhs.linear_term)
+      {
+         return false;
+      }
+
+      if (constant_term != rhs.constant_term)
+      {
+         return false;
+      }
+
+      return true;
+  }
+
+  float width         = 1024.0f;
+  float exp_term      = 1.0f;
+  float exp_scale     = 1.0f;
+  float linear_term   = 1.0f;
+  float constant_term = 0.0f;
+};
+
+typedef std::vector<DensityLayer> DensityProfile;
+
+class AtmosphericModelSettings
+{
+public:
+    AtmosphericModelSettings();
+
+    AtmosphericModelSettings(
+        DensityProfile& rayleighProfile,
+        DensityProfile& mieProfile,
+        DensityProfile& absorptionProfile);
+
+    AtmosphericModelSettings(
+        F32             skyBottomRadius,
+        F32             skyTopRadius,
+        DensityProfile& rayleighProfile,
+        DensityProfile& mieProfile,
+        DensityProfile& absorptionProfile,
+        F32             sunArcRadians,
+        F32             mieAniso);
+
+    bool operator==(const AtmosphericModelSettings& rhs) const;
+
+    F32             m_skyBottomRadius;
+    F32             m_skyTopRadius;
+    DensityProfile  m_rayleighProfile;
+    DensityProfile  m_mieProfile;
+    DensityProfile  m_absorptionProfile;
+    F32             m_sunArcRadians;
+    F32             m_mieAnisotropy;
+};
+
+class LLAtmosphere
+{
+public:
+     LLAtmosphere();
+    ~LLAtmosphere();
+
+    static void initClass();
+    static void cleanupClass();
+
+    const LLAtmosphere& operator=(const LLAtmosphere& rhs)
+    {
+        LL_ERRS() << "Illegal operation!" << LL_ENDL;
+        return *this;
+    }
+
+    LLGLTexture* getTransmittance();
+    LLGLTexture* getScattering();
+    LLGLTexture* getMieScattering();
+    LLGLTexture* getIlluminance();
+
+    bool configureAtmosphericModel(AtmosphericModelSettings& settings);
+
+protected:    
+    LLAtmosphere(const LLAtmosphere& rhs)
+    {
+        *this = rhs;
+    }
+
+    LLPointer<LLGLTexture> m_transmittance;
+    LLPointer<LLGLTexture> m_scattering;
+    LLPointer<LLGLTexture> m_mie_scatter_texture;
+    LLPointer<LLGLTexture> m_illuminance;
+
+    std::vector<double> m_wavelengths;
+    std::vector<double> m_solar_irradiance;
+    std::vector<double> m_rayleigh_scattering;
+    std::vector<double> m_mie_scattering;
+    std::vector<double> m_mie_extinction;
+    std::vector<double> m_absorption_extinction;
+    std::vector<double> m_ground_albedo;
+
+    AtmosphericModelSettings m_settings;
+};
+
+extern LLAtmosphere* gAtmosphere;
+
+#endif // LL_ATMOSPHERE_H
diff --git a/indra/llrender/llcubemap.cpp b/indra/llrender/llcubemap.cpp
index af4e3fdda0..5947bca670 100644
--- a/indra/llrender/llcubemap.cpp
+++ b/indra/llrender/llcubemap.cpp
@@ -43,20 +43,13 @@
 const F32 epsilon = 1e-7f;
 const U16 RESOLUTION = 64;
 
-#if LL_DARWIN
-// mipmap generation on cubemap textures seems to be broken on the Mac for at least some cards.
-// Since the cubemap is small (64x64 per face) and doesn't have any fine detail, turning off mipmaps is a usable workaround.
-const BOOL use_cube_mipmaps = FALSE;
-#else
-const BOOL use_cube_mipmaps = FALSE;  //current build works best without cube mipmaps
-#endif
-
 bool LLCubeMap::sUseCubeMaps = true;
 
-LLCubeMap::LLCubeMap()
+LLCubeMap::LLCubeMap(bool init_as_srgb)
 	: mTextureStage(0),
 	  mTextureCoordStage(0),
-	  mMatrixStage(0)
+	  mMatrixStage(0),
+	  mIssRGB(init_as_srgb)
 {
 	mTargets[0] = GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB;
 	mTargets[1] = GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB;
@@ -82,12 +75,17 @@ void LLCubeMap::initGL()
 			U32 texname = 0;
 			
 			LLImageGL::generateTextures(1, &texname);
-
+			
 			for (int i = 0; i < 6; i++)
 			{
-				mImages[i] = new LLImageGL(64, 64, 4, (use_cube_mipmaps? TRUE : FALSE));
+				mImages[i] = new LLImageGL(RESOLUTION, RESOLUTION, 4, FALSE);
+            #if USE_SRGB_DECODE
+                if (mIssRGB) {
+                    mImages[i]->setExplicitFormat(GL_SRGB8_ALPHA8, GL_RGBA);
+                }
+            #endif
 				mImages[i]->setTarget(mTargets[i], LLTexUnit::TT_CUBE_MAP);
-				mRawImages[i] = new LLImageRaw(64, 64, 4);
+				mRawImages[i] = new LLImageRaw(RESOLUTION, RESOLUTION, 4);
 				mImages[i]->createGLTexture(0, mRawImages[i], texname);
 				
 				gGL.getTexUnit(0)->bindManual(LLTexUnit::TT_CUBE_MAP, texname); 
@@ -154,7 +152,7 @@ void LLCubeMap::initGLData()
 {
 	for (int i = 0; i < 6; i++)
 	{
-		mImages[i]->setSubImage(mRawImages[i], 0, 0, 64, 64);
+		mImages[i]->setSubImage(mRawImages[i], 0, 0, RESOLUTION, RESOLUTION);
 	}
 }
 
@@ -484,7 +482,7 @@ void LLCubeMap::paintIn(LLVector3 dir[4], const LLColor4U& col)
 						td[offset + cc] = U8((td[offset + cc] + col.mV[cc]) * 0.5);
 				}
 			}
-		mImages[side]->setSubImage(mRawImages[side], 0, 0, 64, 64);
+		mImages[side]->setSubImage(mRawImages[side], 0, 0, RESOLUTION, RESOLUTION);
 	}
 }
 
diff --git a/indra/llrender/llcubemap.h b/indra/llrender/llcubemap.h
index ee2c41e026..95b6d12099 100644
--- a/indra/llrender/llcubemap.h
+++ b/indra/llrender/llcubemap.h
@@ -36,8 +36,9 @@ class LLVector3;
 // Environment map hack!
 class LLCubeMap : public LLRefCount
 {
+	bool mIssRGB;
 public:
-	LLCubeMap();
+	LLCubeMap(bool init_as_srgb);
 	void init(const std::vector<LLPointer<LLImageRaw> >& rawimages);
 	void initGL();
 	void initRawData(const std::vector<LLPointer<LLImageRaw> >& rawimages);
diff --git a/indra/llrender/llgl.cpp b/indra/llrender/llgl.cpp
index c0f0cec80b..c01c15391d 100644
--- a/indra/llrender/llgl.cpp
+++ b/indra/llrender/llgl.cpp
@@ -36,6 +36,7 @@
 #include "llsys.h"
 
 #include "llgl.h"
+#include "llglstates.h"
 #include "llrender.h"
 
 #include "llerror.h"
@@ -998,6 +999,12 @@ void LLGLManager::initExtensions()
 	mHassRGBFramebuffer = ExtensionExists("GL_EXT_framebuffer_sRGB", gGLHExts.mSysExts);
 #endif
 	
+#ifdef GL_EXT_texture_sRGB_decode
+    mHasTexturesRGBDecode = ExtensionExists("GL_EXT_texture_sRGB_decode", gGLHExts.mSysExts);
+#else
+    mHasTexturesRGBDecode = ExtensionExists("GL_ARB_texture_sRGB_decode", gGLHExts.mSysExts);
+#endif
+
 	mHasMipMapGeneration = mHasFramebufferObject || mGLVersion >= 1.4f;
 
 	mHasDrawBuffers = ExtensionExists("GL_ARB_draw_buffers", gGLHExts.mSysExts);
@@ -2044,7 +2051,8 @@ LLGLState::LLGLState(LLGLenum state, S32 enabled) :
 	if (mState)
 	{
 		mWasEnabled = sStateMap[state];
-		llassert(mWasEnabled == glIsEnabled(state));
+        // we can't actually assert on this as queued changes to state are not reflected by glIsEnabled
+		//llassert(mWasEnabled == glIsEnabled(state));
 		setEnabled(enabled);
 		stop_glerror();
 	}
@@ -2267,6 +2275,17 @@ LLGLUserClipPlane::LLGLUserClipPlane(const LLPlane& p, const glh::matrix4f& mode
 	}
 }
 
+void LLGLUserClipPlane::disable()
+{
+    if (mApply)
+	{
+		gGL.matrixMode(LLRender::MM_PROJECTION);
+		gGL.popMatrix();
+		gGL.matrixMode(LLRender::MM_MODELVIEW);
+	}
+    mApply = false;
+}
+
 void LLGLUserClipPlane::setPlane(F32 a, F32 b, F32 c, F32 d)
 {
 	glh::matrix4f& P = mProjection;
@@ -2295,12 +2314,7 @@ void LLGLUserClipPlane::setPlane(F32 a, F32 b, F32 c, F32 d)
 
 LLGLUserClipPlane::~LLGLUserClipPlane()
 {
-	if (mApply)
-	{
-		gGL.matrixMode(LLRender::MM_PROJECTION);
-		gGL.popMatrix();
-		gGL.matrixMode(LLRender::MM_MODELVIEW);
-	}
+	disable();
 }
 
 LLGLNamePool::LLGLNamePool()
@@ -2478,27 +2492,45 @@ void LLGLDepthTest::checkState()
 	}
 }
 
-LLGLSquashToFarClip::LLGLSquashToFarClip(glh::matrix4f P, U32 layer)
+LLGLSquashToFarClip::LLGLSquashToFarClip()
+{
+    glh::matrix4f proj = get_current_projection();
+    setProjectionMatrix(proj, 0);
+}
+
+LLGLSquashToFarClip::LLGLSquashToFarClip(glh::matrix4f& P, U32 layer)
+{
+    setProjectionMatrix(P, layer);
+}
+
+
+void LLGLSquashToFarClip::setProjectionMatrix(glh::matrix4f& projection, U32 layer)
 {
 
 	F32 depth = 0.99999f - 0.0001f * layer;
 
 	for (U32 i = 0; i < 4; i++)
 	{
-		P.element(2, i) = P.element(3, i) * depth;
+		projection.element(2, i) = projection.element(3, i) * depth;
 	}
 
+    LLRender::eMatrixMode last_matrix_mode = gGL.getMatrixMode();
+
 	gGL.matrixMode(LLRender::MM_PROJECTION);
 	gGL.pushMatrix();
-	gGL.loadMatrix(P.m);
-	gGL.matrixMode(LLRender::MM_MODELVIEW);
+	gGL.loadMatrix(projection.m);
+
+	gGL.matrixMode(last_matrix_mode);
 }
 
 LLGLSquashToFarClip::~LLGLSquashToFarClip()
 {
+    LLRender::eMatrixMode last_matrix_mode = gGL.getMatrixMode();
+
 	gGL.matrixMode(LLRender::MM_PROJECTION);
 	gGL.popMatrix();
-	gGL.matrixMode(LLRender::MM_MODELVIEW);
+
+	gGL.matrixMode(last_matrix_mode);
 }
 
 
@@ -2561,6 +2593,43 @@ void LLGLSyncFence::wait()
 #endif
 }
 
+LLGLSPipelineSkyBox::LLGLSPipelineSkyBox()
+: mAlphaTest(GL_ALPHA_TEST)
+, mCullFace(GL_CULL_FACE)
+, mSquashClip()
+{ 
+    if (!LLGLSLShader::sNoFixedFunction)
+    {
+        glDisable(GL_LIGHTING);
+        glDisable(GL_FOG);
+        glDisable(GL_CLIP_PLANE0);
+    }
+}
+
+LLGLSPipelineSkyBox::~LLGLSPipelineSkyBox()
+{
+    if (!LLGLSLShader::sNoFixedFunction)
+    {
+        glEnable(GL_LIGHTING);
+        glEnable(GL_FOG);
+        glEnable(GL_CLIP_PLANE0);
+    }
+}
+
+LLGLSPipelineDepthTestSkyBox::LLGLSPipelineDepthTestSkyBox(bool depth_test, bool depth_write)
+: LLGLSPipelineSkyBox()
+, mDepth(depth_test ? GL_TRUE : GL_FALSE, depth_write ? GL_TRUE : GL_FALSE, GL_LEQUAL)
+{
+
+}
+
+LLGLSPipelineBlendSkyBox::LLGLSPipelineBlendSkyBox(bool depth_test, bool depth_write)
+: LLGLSPipelineDepthTestSkyBox(depth_test, depth_write)    
+, mBlend(GL_BLEND)
+{ 
+    gGL.setSceneBlendType(LLRender::BT_ALPHA);
+}
+
 #if LL_WINDOWS
 // Expose desired use of high-performance graphics processor to Optimus driver
 extern "C" 
diff --git a/indra/llrender/llgl.h b/indra/llrender/llgl.h
index 4c4302d05b..a7faea7d33 100644
--- a/indra/llrender/llgl.h
+++ b/indra/llrender/llgl.h
@@ -118,6 +118,7 @@ public:
 	BOOL mHasDebugOutput;
 	BOOL mHassRGBTexture;
 	BOOL mHassRGBFramebuffer;
+    BOOL mHasTexturesRGBDecode;
 
 	// Vendor-specific extensions
 	BOOL mIsATI;
@@ -348,6 +349,7 @@ public:
 	~LLGLUserClipPlane();
 
 	void setPlane(F32 a, F32 b, F32 c, F32 d);
+    void disable();
 
 private:
 	bool mApply;
@@ -360,14 +362,17 @@ private:
   Modify and load projection matrix to push depth values to far clip plane.
 
   Restores projection matrix on destruction.
-  GL_MODELVIEW_MATRIX is active whenever program execution
-  leaves this class.
+  Saves/restores matrix mode around projection manipulation.
   Does not stack.
 */
 class LLGLSquashToFarClip
 {
 public:
-	LLGLSquashToFarClip(glh::matrix4f projection, U32 layer = 0);
+    LLGLSquashToFarClip();
+	LLGLSquashToFarClip(glh::matrix4f& projection, U32 layer = 0);
+
+    void setProjectionMatrix(glh::matrix4f& projection, U32 layer);
+
 	~LLGLSquashToFarClip();
 };
 
diff --git a/indra/llrender/llglcommonfunc.h b/indra/llrender/llglcommonfunc.h
index f1f8ff7bc4..e6d3755755 100644
--- a/indra/llrender/llglcommonfunc.h
+++ b/indra/llrender/llglcommonfunc.h
@@ -1,5 +1,5 @@
 /**
-* @file llphoenixfunc.h
+* @file llglcommonfunc.h
 * @brief File include common opengl code snippets
 *
 * $LicenseInfo:firstyear=2003&license=viewerlgpl$
diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index 141ed51260..384e5bf99f 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -37,12 +37,6 @@
 #include "OpenGL/OpenGL.h"
 #endif
 
-#ifdef LL_RELEASE_FOR_DOWNLOAD
-#define UNIFORM_ERRS LL_WARNS_ONCE("Shader")
-#else
-#define UNIFORM_ERRS LL_ERRS("Shader")
-#endif
-
 // Lots of STL stuff in here, using namespace std to keep things more readable
 using std::vector;
 using std::pair;
@@ -84,6 +78,12 @@ LLShaderFeatures::LLShaderFeatures()
     , hasObjectSkinning(false)
     , hasAtmospherics(false)
     , hasGamma(false)
+    , hasSrgb(false)
+    , encodesNormal(false)
+    , isDeferred(false)
+    , hasIndirect(false)
+    , hasShadows(false)
+    , hasAmbientOcclusion(false)
     , mIndexedTextureChannels(0)
     , disableTextureIndex(false)
     , hasAlphaMask(false)
@@ -344,13 +344,13 @@ void LLGLSLShader::unloadInternal()
     {
         GLhandleARB obj[1024];
         GLsizei count;
+        glGetAttachedObjectsARB(mProgramObject, 1024, &count, obj);
 
-        glGetAttachedObjectsARB(mProgramObject, sizeof(obj)/sizeof(obj[0]), &count, obj);
         for (GLsizei i = 0; i < count; i++)
         {
             glDetachObjectARB(mProgramObject, obj[i]);
-                glDeleteObjectARB(obj[i]);
-            }
+            glDeleteObjectARB(obj[i]);
+        }
 
         glDeleteObjectARB(mProgramObject);
 
@@ -448,12 +448,12 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
     }
     if( !success )
     {
-        LL_WARNS("ShaderLoading") << "Failed to link shader: " << mName << LL_ENDL;
+        LL_SHADER_LOADING_WARNS() << "Failed to link shader: " << mName << LL_ENDL;
 
         // Try again using a lower shader level;
         if (mShaderLevel > 0)
         {
-            LL_WARNS("ShaderLoading") << "Failed to link using shader level " << mShaderLevel << " trying again using shader level " << (mShaderLevel - 1) << LL_ENDL;
+            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);
         }
@@ -485,18 +485,33 @@ BOOL LLGLSLShader::createShader(std::vector<LLStaticHashedString> * attributes,
     return success;
 }
 
-BOOL LLGLSLShader::attachObject(std::string object)
+BOOL LLGLSLShader::attachVertexObject(std::string object_path) {
+    if (LLShaderMgr::instance()->mVertexShaderObjects.count(object_path) > 0)
+    {
+        stop_glerror();
+        glAttachObjectARB(mProgramObject, LLShaderMgr::instance()->mVertexShaderObjects[object_path]);
+        stop_glerror();
+        return TRUE;
+    }
+    else
+    {
+        LL_SHADER_LOADING_WARNS() << "Attempting to attach shader object: '" << object_path << "' that hasn't been compiled." << LL_ENDL;
+        return FALSE;
+    }
+}
+
+BOOL LLGLSLShader::attachFragmentObject(std::string object_path)
 {
-    if (LLShaderMgr::instance()->mShaderObjects.count(object) > 0)
+    if (LLShaderMgr::instance()->mFragmentShaderObjects.count(object_path) > 0)
     {
         stop_glerror();
-        glAttachObjectARB(mProgramObject, LLShaderMgr::instance()->mShaderObjects[object]);
+        glAttachObjectARB(mProgramObject, LLShaderMgr::instance()->mFragmentShaderObjects[object_path]);
         stop_glerror();
         return TRUE;
     }
     else
     {
-        LL_WARNS("ShaderLoading") << "Attempting to attach shader object that hasn't been compiled: " << object << LL_ENDL;
+        LL_SHADER_LOADING_WARNS() << "Attempting to attach shader object: '" << object_path << "' that hasn't been compiled." << LL_ENDL;
         return FALSE;
     }
 }
@@ -511,7 +526,7 @@ void LLGLSLShader::attachObject(GLhandleARB object)
     }
     else
     {
-        LL_WARNS("ShaderLoading") << "Attempting to attach non existing shader object. " << LL_ENDL;
+        LL_SHADER_LOADING_WARNS() << "Attempting to attach non existing shader object. " << LL_ENDL;
     }
 }
 
@@ -690,6 +705,11 @@ void LLGLSLShader::mapUniform(GLint index, const vector<LLStaticHashedString> *
     }
 }
 
+void LLGLSLShader::clearPermutations()
+{
+    mDefines.clear();
+}
+
 void LLGLSLShader::addPermutation(std::string name, std::string value)
 {
     mDefines[name] = value;
@@ -759,18 +779,19 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 	S32 diffuseMap = glGetUniformLocationARB(mProgramObject, "diffuseMap");
 	S32 specularMap = glGetUniformLocationARB(mProgramObject, "specularMap");
 	S32 bumpMap = glGetUniformLocationARB(mProgramObject, "bumpMap");
+    S32 altDiffuseMap = glGetUniformLocationARB(mProgramObject, "altDiffuseMap");
 	S32 environmentMap = glGetUniformLocationARB(mProgramObject, "environmentMap");
 
 	std::set<S32> skip_index;
 
-	if (-1 != diffuseMap && (-1 != specularMap || -1 != bumpMap || -1 != environmentMap))
+	if (-1 != diffuseMap && (-1 != specularMap || -1 != bumpMap || -1 != environmentMap || -1 != altDiffuseMap))
 	{
 		GLenum type;
 		GLsizei length;
 		GLint size = -1;
 		char name[1024];
 
-		diffuseMap = specularMap = bumpMap = environmentMap = -1;
+		diffuseMap = altDiffuseMap = specularMap = bumpMap = environmentMap = -1;
 
 		for (S32 i = 0; i < activeCount; i++)
 		{
@@ -790,12 +811,6 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 				continue;
 			}
 
-			if (-1 == specularMap && std::string(name) == "specularMap")
-			{
-				specularMap = i;
-				continue;
-			}
-
 			if (-1 == bumpMap && std::string(name) == "bumpMap")
 			{
 				bumpMap = i;
@@ -807,6 +822,12 @@ BOOL LLGLSLShader::mapUniforms(const vector<LLStaticHashedString> * uniforms)
 				environmentMap = i;
 				continue;
 			}
+
+            if (-1 == altDiffuseMap && std::string(name) == "altDiffuseMap")
+			{
+				altDiffuseMap = i;
+				continue;
+			}
 		}
 
 		bool specularDiff = specularMap < diffuseMap && -1 != specularMap;
@@ -858,7 +879,7 @@ BOOL LLGLSLShader::link(BOOL suppress_errors)
 {
     BOOL success = LLShaderMgr::instance()->linkProgramObject(mProgramObject, suppress_errors);
 
-    if (!suppress_errors)
+    if (!success && !suppress_errors)
     {
         LLShaderMgr::instance()->dumpObjectLog(mProgramObject, !success, mName);
     }
@@ -916,19 +937,19 @@ void LLGLSLShader::bindNoShader(void)
     }
 }
 
-S32 LLGLSLShader::bindTexture(const std::string &uniform, LLTexture *texture, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::bindTexture(const std::string &uniform, LLTexture *texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
 {
     S32 channel = 0;
     channel = getUniformLocation(uniform);
     
-    return bindTexture(channel, texture, mode);
+    return bindTexture(channel, texture, mode, colorspace);
 }
 
-S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace colorspace)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
-        UNIFORM_ERRS << "Uniform out of range: " << uniform << LL_ENDL;
+        LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
     
@@ -937,6 +958,7 @@ S32 LLGLSLShader::bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextu
     if (uniform > -1)
     {
         gGL.getTexUnit(uniform)->bind(texture, mode);
+        gGL.getTexUnit(uniform)->setTextureColorSpace(colorspace);
     }
     
     return uniform;
@@ -954,7 +976,7 @@ S32 LLGLSLShader::unbindTexture(S32 uniform, LLTexUnit::eTextureType mode)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
-        UNIFORM_ERRS << "Uniform out of range: " << uniform << LL_ENDL;
+        LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
     
@@ -968,11 +990,11 @@ S32 LLGLSLShader::unbindTexture(S32 uniform, LLTexUnit::eTextureType mode)
     return uniform;
 }
 
-S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace space)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
-        UNIFORM_ERRS << "Uniform out of range: " << uniform << LL_ENDL;
+        LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
     S32 index = mTexture[uniform];
@@ -980,21 +1002,22 @@ S32 LLGLSLShader::enableTexture(S32 uniform, LLTexUnit::eTextureType mode)
     {
         gGL.getTexUnit(index)->activate();
         gGL.getTexUnit(index)->enable(mode);
+        gGL.getTexUnit(index)->setTextureColorSpace(space);
     }
     return index;
 }
 
-S32 LLGLSLShader::disableTexture(S32 uniform, LLTexUnit::eTextureType mode)
+S32 LLGLSLShader::disableTexture(S32 uniform, LLTexUnit::eTextureType mode, LLTexUnit::eTextureColorSpace space)
 {
     if (uniform < 0 || uniform >= (S32)mTexture.size())
     {
-        UNIFORM_ERRS << "Uniform out of range: " << uniform << LL_ENDL;
+        LL_SHADER_UNIFORM_ERRS() << "Uniform out of range: " << uniform << LL_ENDL;
         return -1;
     }
     S32 index = mTexture[uniform];
     if (index != -1 && gGL.getTexUnit(index)->getCurrType() != LLTexUnit::TT_NONE)
     {
-        if (gDebugGL && gGL.getTexUnit(index)->getCurrType() != mode)
+        if (gDebugGL && gGL.getTexUnit(index)->getCurrType() != mode && gGL.getTexUnit(index)->getCurrColorSpace() != space)
         {
             if (gDebugSession)
             {
@@ -1017,7 +1040,7 @@ void LLGLSLShader::uniform1i(U32 index, GLint x)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1039,7 +1062,7 @@ void LLGLSLShader::uniform1f(U32 index, GLfloat x)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1061,7 +1084,7 @@ void LLGLSLShader::uniform2f(U32 index, GLfloat x, GLfloat y)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1084,7 +1107,7 @@ void LLGLSLShader::uniform3f(U32 index, GLfloat x, GLfloat y, GLfloat z)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1107,7 +1130,7 @@ void LLGLSLShader::uniform4f(U32 index, GLfloat x, GLfloat y, GLfloat z, GLfloat
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1130,7 +1153,7 @@ void LLGLSLShader::uniform1iv(U32 index, U32 count, const GLint* v)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1153,7 +1176,7 @@ void LLGLSLShader::uniform1fv(U32 index, U32 count, const GLfloat* v)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1176,7 +1199,7 @@ void LLGLSLShader::uniform2fv(U32 index, U32 count, const GLfloat* v)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1199,7 +1222,7 @@ void LLGLSLShader::uniform3fv(U32 index, U32 count, const GLfloat* v)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1222,7 +1245,7 @@ void LLGLSLShader::uniform4fv(U32 index, U32 count, const GLfloat* v)
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1245,7 +1268,7 @@ void LLGLSLShader::uniformMatrix2fv(U32 index, U32 count, GLboolean transpose, c
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1262,7 +1285,7 @@ void LLGLSLShader::uniformMatrix3fv(U32 index, U32 count, GLboolean transpose, c
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
@@ -1279,7 +1302,7 @@ void LLGLSLShader::uniformMatrix3x4fv(U32 index, U32 count, GLboolean transpose,
 	{	
 		if (mUniform.size() <= index)
 		{
-			UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+			LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
 			return;
 		}
 
@@ -1296,7 +1319,7 @@ void LLGLSLShader::uniformMatrix4fv(U32 index, U32 count, GLboolean transpose, c
     {   
         if (mUniform.size() <= index)
         {
-            UNIFORM_ERRS << "Uniform index out of bounds." << LL_ENDL;
+            LL_SHADER_UNIFORM_ERRS() << "Uniform index out of bounds." << LL_ENDL;
             return;
         }
 
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index b56b914013..7cf6d3c941 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -48,6 +48,12 @@ public:
 	bool hasObjectSkinning;
 	bool hasAtmospherics;
 	bool hasGamma;
+    bool hasShadows;
+    bool hasAmbientOcclusion;
+	bool hasSrgb;
+    bool encodesNormal;
+    bool isDeferred;
+    bool hasIndirect;
 	S32 mIndexedTextureChannels;
 	bool disableTextureIndex;
 	bool hasAlphaMask;
@@ -96,7 +102,8 @@ public:
 						std::vector<LLStaticHashedString> * uniforms,
 						U32 varying_count = 0,
 						const char** varyings = NULL);
-	BOOL attachObject(std::string object);
+    BOOL attachFragmentObject(std::string object);
+    BOOL attachVertexObject(std::string object);
 	void attachObject(GLhandleARB object);
 	void attachObjects(GLhandleARB* objects = NULL, S32 count = 0);
 	BOOL mapAttributes(const std::vector<LLStaticHashedString> * attributes);
@@ -139,6 +146,7 @@ public:
 	GLint getAttribLocation(U32 attrib);
 	GLint mapUniformTextureChannel(GLint location, GLenum type);
 	
+    void clearPermutations();
 	void addPermutation(std::string name, std::string value);
 	void removePermutation(std::string name);
 	
@@ -146,13 +154,13 @@ public:
 	//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);
-	S32 disableTexture(S32 uniform, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
+	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);
-	S32 bindTexture(S32 uniform, LLTexture *texture, LLTexUnit::eTextureType mode = LLTexUnit::TT_TEXTURE);
+	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);
 	
diff --git a/indra/llrender/llglstates.h b/indra/llrender/llglstates.h
index 0e2c3bcb44..a4924eba14 100644
--- a/indra/llrender/llglstates.h
+++ b/indra/llrender/llglstates.h
@@ -208,11 +208,27 @@ public:
 class LLGLSPipelineSkyBox
 { 
 protected:
-	LLGLDisable mAlphaTest, mCullFace, mFog;
+	LLGLDisable mAlphaTest;
+    LLGLDisable mCullFace;
+    LLGLSquashToFarClip mSquashClip;
 public:
-	LLGLSPipelineSkyBox()
-		: mAlphaTest(GL_ALPHA_TEST), mCullFace(GL_CULL_FACE), mFog(GL_FOG)
-	{ }
+	LLGLSPipelineSkyBox();
+   ~LLGLSPipelineSkyBox();
+};
+
+class LLGLSPipelineDepthTestSkyBox : public LLGLSPipelineSkyBox
+{ 
+public:
+	LLGLSPipelineDepthTestSkyBox(bool depth_test, bool depth_write);
+
+    LLGLDepthTest mDepth;
+};
+
+class LLGLSPipelineBlendSkyBox : public LLGLSPipelineDepthTestSkyBox 
+{ 
+public:
+	LLGLSPipelineBlendSkyBox(bool depth_test, bool depth_write);
+    LLGLEnable mBlend;    
 };
 
 class LLGLSTracker
diff --git a/indra/llrender/llgltexture.cpp b/indra/llrender/llgltexture.cpp
index 3a6eebebba..ad501687ed 100644
--- a/indra/llrender/llgltexture.cpp
+++ b/indra/llrender/llgltexture.cpp
@@ -288,6 +288,18 @@ void  LLGLTexture::setCategory(S32 category)
 	mGLTexturep->setCategory(category) ;
 }
 
+void LLGLTexture::setTexName(LLGLuint texName)
+{
+    llassert(mGLTexturep.notNull());
+    return mGLTexturep->setTexName(texName); 
+}
+
+void LLGLTexture::setTarget(const LLGLenum target, const LLTexUnit::eTextureType bind_target)
+{
+    llassert(mGLTexturep.notNull());
+    return mGLTexturep->setTarget(target, bind_target); 
+}
+
 LLTexUnit::eTextureAddressMode LLGLTexture::getAddressMode(void) const
 {
 	llassert(mGLTexturep.notNull()) ;
@@ -389,9 +401,11 @@ void LLGLTexture::destroyGLTexture()
 
 void LLGLTexture::setTexelsPerImage()
 {
-	S32 fullwidth = llmin(mFullWidth,(S32)MAX_IMAGE_SIZE_DEFAULT);
-	S32 fullheight = llmin(mFullHeight,(S32)MAX_IMAGE_SIZE_DEFAULT);
-	mTexelsPerImage = (F32)fullwidth * fullheight;
+	U32 fullwidth = llmin(mFullWidth,U32(MAX_IMAGE_SIZE_DEFAULT));
+	U32 fullheight = llmin(mFullHeight,U32(MAX_IMAGE_SIZE_DEFAULT));
+	mTexelsPerImage = (U32)fullwidth * fullheight;
 }
 
+static LLUUID sStubUUID;
 
+const LLUUID& LLGLTexture::getID() const { return sStubUUID; }
diff --git a/indra/llrender/llgltexture.h b/indra/llrender/llgltexture.h
index 70610d9626..071912c2c2 100644
--- a/indra/llrender/llgltexture.h
+++ b/indra/llrender/llgltexture.h
@@ -1,5 +1,5 @@
 /** 
- * @file llglviewertexture.h
+ * @file llgltexture.h
  * @brief Object for managing opengl textures
  *
  * $LicenseInfo:firstyear=2012&license=viewerlgpl$
@@ -104,7 +104,7 @@ public:
 
 	virtual void dump();	// debug info to LL_INFOS()
 
-	virtual const LLUUID& getID() const = 0;
+	virtual const LLUUID& getID() const;
 
 	void setBoostLevel(S32 level);
 	S32  getBoostLevel() { return mBoostLevel; }
@@ -133,6 +133,8 @@ public:
 	BOOL       setSubImage(const U8* datap, S32 data_width, S32 data_height, S32 x_pos, S32 y_pos, S32 width, S32 height);
 	void       setGLTextureCreated (bool initialized);
 	void       setCategory(S32 category) ;
+    void       setTexName(LLGLuint); // for forcing w/ externally created textures only
+    void       setTarget(const LLGLenum target, const LLTexUnit::eTextureType bind_target);
 
 	LLTexUnit::eTextureAddressMode getAddressMode(void) const ;
 	S32        getMaxDiscardLevel() const;
@@ -179,11 +181,11 @@ protected:
 
 protected:
 	S32 mBoostLevel;				// enum describing priority level
-	S32 mFullWidth;
-	S32 mFullHeight;
+	U32 mFullWidth;
+	U32 mFullHeight;
 	BOOL mUseMipMaps;
 	S8  mComponents;
-	F32 mTexelsPerImage;			// Texels per image.
+	U32 mTexelsPerImage;			// Texels per image.
 	mutable S8  mNeedsGLTexture;
 
 	//GL texture
diff --git a/indra/llrender/llimagegl.cpp b/indra/llrender/llimagegl.cpp
index 40217b2e80..ff74380217 100644
--- a/indra/llrender/llimagegl.cpp
+++ b/indra/llrender/llimagegl.cpp
@@ -184,34 +184,47 @@ void LLImageGL::cleanupClass()
 //static
 S32 LLImageGL::dataFormatBits(S32 dataformat)
 {
-	switch (dataformat)
-	{
-	  case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:	return 4;
-	  case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:	return 8;
-	  case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:	return 8;
-	  case GL_LUMINANCE:						return 8;
-	  case GL_ALPHA:							return 8;
-	  case GL_COLOR_INDEX:						return 8;
-	  case GL_LUMINANCE_ALPHA:					return 16;
-	  case GL_RGB:								return 24;
-	  case GL_RGB8:								return 24;
-	  case GL_RGBA:								return 32;
-	  case GL_BGRA:								return 32;		// Used for QuickTime media textures on the Mac
-	  default:
-		LL_ERRS() << "LLImageGL::Unknown format: " << dataformat << LL_ENDL;
-		return 0;
-	}
+    switch (dataformat)
+    {
+    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:	        return 4;
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:    return 4;
+    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:	        return 8;
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:    return 8;
+    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:	        return 8;
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:    return 8;
+    case GL_LUMINANCE:						        return 8;
+    case GL_ALPHA:							        return 8;
+    case GL_COLOR_INDEX:						    return 8;
+    case GL_LUMINANCE_ALPHA:					    return 16;
+    case GL_RGB:								    return 24;
+    case GL_SRGB:								    return 24;
+    case GL_RGB8:								    return 24;
+    case GL_RGBA:								    return 32;
+    case GL_SRGB_ALPHA:						        return 32;
+    case GL_BGRA:								    return 32;		// Used for QuickTime media textures on the Mac
+    default:
+        LL_ERRS() << "LLImageGL::Unknown format: " << dataformat << LL_ENDL;
+        return 0;
+    }
 }
 
 //static
 S32 LLImageGL::dataFormatBytes(S32 dataformat, S32 width, S32 height)
 {
-	if (dataformat >= GL_COMPRESSED_RGB_S3TC_DXT1_EXT &&
-		dataformat <= GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)
-	{
-		if (width < 4) width = 4;
-		if (height < 4) height = 4;
-	}
+    switch (dataformat)
+    {
+    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+        if (width < 4) width = 4;
+        if (height < 4) height = 4;
+        break;
+    default:
+        break;
+    }
 	S32 bytes ((width*height*dataFormatBits(dataformat)+7)>>3);
 	S32 aligned = (bytes+3)&~3;
 	return aligned;
@@ -223,14 +236,19 @@ S32 LLImageGL::dataFormatComponents(S32 dataformat)
 	switch (dataformat)
 	{
 	  case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:	return 3;
+	  case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: return 3;
 	  case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:	return 4;
+	  case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: return 4;
 	  case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:	return 4;
+	  case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT: return 4;
 	  case GL_LUMINANCE:						return 1;
 	  case GL_ALPHA:							return 1;
 	  case GL_COLOR_INDEX:						return 1;
 	  case GL_LUMINANCE_ALPHA:					return 2;
 	  case GL_RGB:								return 3;
+	  case GL_SRGB:								return 3;
 	  case GL_RGBA:								return 4;
+	  case GL_SRGB_ALPHA:						return 4;
 	  case GL_BGRA:								return 4;		// Used for QuickTime media textures on the Mac
 	  default:
 		LL_ERRS() << "LLImageGL::Unknown format: " << dataformat << LL_ENDL;
@@ -355,7 +373,7 @@ BOOL LLImageGL::create(LLPointer<LLImageGL>& dest, const LLImageRaw* imageraw, B
 
 LLImageGL::LLImageGL(BOOL usemipmaps)
 :	LLTrace::MemTrackable<LLImageGL>("LLImageGL"),
-	mSaveData(0)
+    mSaveData(0), mExternalTexture(FALSE)
 {
 	init(usemipmaps);
 	setSize(0, 0, 0);
@@ -365,7 +383,7 @@ LLImageGL::LLImageGL(BOOL usemipmaps)
 
 LLImageGL::LLImageGL(U32 width, U32 height, U8 components, BOOL usemipmaps)
 :	LLTrace::MemTrackable<LLImageGL>("LLImageGL"),
-	mSaveData(0)
+    mSaveData(0), mExternalTexture(FALSE)
 {
 	llassert( components <= 4 );
 	init(usemipmaps);
@@ -376,7 +394,7 @@ LLImageGL::LLImageGL(U32 width, U32 height, U8 components, BOOL usemipmaps)
 
 LLImageGL::LLImageGL(const LLImageRaw* imageraw, BOOL usemipmaps)
 :	LLTrace::MemTrackable<LLImageGL>("LLImageGL"),
-	mSaveData(0)
+    mSaveData(0), mExternalTexture(FALSE)
 {
 	init(usemipmaps);
 	setSize(0, 0, 0);
@@ -386,12 +404,36 @@ LLImageGL::LLImageGL(const LLImageRaw* imageraw, BOOL usemipmaps)
 	createGLTexture(0, imageraw); 
 }
 
+LLImageGL::LLImageGL(
+    LLGLuint texName,
+    U32 components,
+    LLGLenum target,
+    LLGLint  formatInternal,
+    LLGLenum formatPrimary,
+    LLGLenum formatType,
+    LLTexUnit::eTextureAddressMode addressMode)
+    : LLTrace::MemTrackable<LLImageGL>("LLImageGL"), mSaveData(0), mExternalTexture(TRUE)
+{
+    init(false);
+    mTexName = texName;
+    mTarget = target;
+    mComponents = components;
+    mAddressMode = addressMode;
+    mFormatType = formatType;
+    mFormatInternal = formatInternal;
+    mFormatPrimary = formatPrimary;
+}
+
+
 LLImageGL::~LLImageGL()
 {
-	LLImageGL::cleanup();
-	sImageList.erase(this);
-	freePickMask();
-	sCount--;
+    if (!mExternalTexture)
+    {
+	    LLImageGL::cleanup();
+	    sImageList.erase(this);
+	    freePickMask();
+	    sCount--;
+    }
 }
 
 void LLImageGL::init(BOOL usemipmaps)
@@ -626,10 +668,20 @@ BOOL LLImageGL::setImage(const U8* data_in, BOOL data_hasmips)
 {
 	LL_RECORD_BLOCK_TIME(FTM_SET_IMAGE);
 	bool is_compressed = false;
-	if (mFormatPrimary >= GL_COMPRESSED_RGBA_S3TC_DXT1_EXT && mFormatPrimary <= GL_COMPRESSED_RGBA_S3TC_DXT5_EXT)
-	{
-		is_compressed = true;
-	}
+
+    switch (mFormatPrimary)
+    {
+    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
+    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
+    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
+    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
+        is_compressed = true;
+        break;
+    default:
+        break;
+    }
 	
 	
 	
@@ -1203,10 +1255,18 @@ void LLImageGL::setManualImage(U32 target, S32 miplevel, S32 intformat, S32 widt
 			case GL_RGB8:
 				intformat = GL_COMPRESSED_RGB; 
 				break;
+            case GL_SRGB:
+            case GL_SRGB8:
+                intformat = GL_COMPRESSED_SRGB;
+                break;
 			case GL_RGBA:
 			case GL_RGBA8:
 				intformat = GL_COMPRESSED_RGBA; 
 				break;
+            case GL_SRGB_ALPHA:
+            case GL_SRGB8_ALPHA8:
+                intformat = GL_COMPRESSED_SRGB_ALPHA;
+                break;
 			case GL_LUMINANCE:
 			case GL_LUMINANCE8:
 				intformat = GL_COMPRESSED_LUMINANCE;
@@ -1310,33 +1370,51 @@ BOOL LLImageGL::createGLTexture(S32 discard_level, const LLImageRaw* imageraw, S
 
 	if( !mHasExplicitFormat )
 	{
-		switch (mComponents)
-		{
-			case 1:
-			// Use luminance alpha (for fonts)
-			mFormatInternal = GL_LUMINANCE8;
-			mFormatPrimary = GL_LUMINANCE;
-			mFormatType = GL_UNSIGNED_BYTE;
-			break;
-			case 2:
-			// Use luminance alpha (for fonts)
-			mFormatInternal = GL_LUMINANCE8_ALPHA8;
-			mFormatPrimary = GL_LUMINANCE_ALPHA;
-			mFormatType = GL_UNSIGNED_BYTE;
-			break;
-			case 3:
-			mFormatInternal = GL_RGB8;
-			mFormatPrimary = GL_RGB;
-			mFormatType = GL_UNSIGNED_BYTE;
-			break;
-			case 4:
-			mFormatInternal = GL_RGBA8;
-			mFormatPrimary = GL_RGBA;
-			mFormatType = GL_UNSIGNED_BYTE;
-			break;
-			default:
-			LL_ERRS() << "Bad number of components for texture: " << (U32)getComponents() << LL_ENDL;
-		}
+        switch (mComponents)
+        {
+        case 1:
+            // Use luminance alpha (for fonts)
+            mFormatInternal = GL_LUMINANCE8;
+            mFormatPrimary = GL_LUMINANCE;
+            mFormatType = GL_UNSIGNED_BYTE;
+            break;
+        case 2:
+            // Use luminance alpha (for fonts)
+            mFormatInternal = GL_LUMINANCE8_ALPHA8;
+            mFormatPrimary = GL_LUMINANCE_ALPHA;
+            mFormatType = GL_UNSIGNED_BYTE;
+            break;
+        case 3:
+        #if USE_SRGB_DECODE
+            if (gGLManager.mHasTexturesRGBDecode)
+            {
+                mFormatInternal = GL_SRGB8;
+            }
+            else
+        #endif
+            {
+                mFormatInternal = GL_RGB8;
+            }
+            mFormatPrimary = GL_RGB;
+            mFormatType = GL_UNSIGNED_BYTE;
+            break;
+        case 4:
+        #if USE_SRGB_DECODE
+            if (gGLManager.mHasTexturesRGBDecode)
+            {
+                mFormatInternal = GL_SRGB8_ALPHA8;
+            }
+            else
+        #endif
+            {
+                mFormatInternal = GL_RGBA8;
+            }
+            mFormatPrimary = GL_RGBA;
+            mFormatType = GL_UNSIGNED_BYTE;
+            break;
+        default:
+            LL_ERRS() << "Bad number of components for texture: " << (U32)getComponents() << LL_ENDL;
+        }
 
 		calcAlphaChannelOffsetAndStride() ;
 	}
@@ -1764,28 +1842,30 @@ void LLImageGL::calcAlphaChannelOffsetAndStride()
 	}
 
 	mAlphaStride = -1 ;
-	switch (mFormatPrimary)
-	{
-	case GL_LUMINANCE:
-	case GL_ALPHA:
-		mAlphaStride = 1;
-		break;
-	case GL_LUMINANCE_ALPHA:
-		mAlphaStride = 2;
-		break;
-	case GL_RGB:
-		mNeedsAlphaAndPickMask = FALSE ;
-		mIsMask = FALSE;
-		return ; //no alpha channel.
-	case GL_RGBA:
-		mAlphaStride = 4;
-		break;
-	case GL_BGRA_EXT:
-		mAlphaStride = 4;
-		break;
-	default:
-		break;
-	}
+    switch (mFormatPrimary)
+    {
+    case GL_LUMINANCE:
+    case GL_ALPHA:
+        mAlphaStride = 1;
+        break;
+    case GL_LUMINANCE_ALPHA:
+        mAlphaStride = 2;
+        break;
+    case GL_RGB:
+    case GL_SRGB:
+        mNeedsAlphaAndPickMask = FALSE;
+        mIsMask = FALSE;
+        return; //no alpha channel.
+    case GL_RGBA:
+    case GL_SRGB_ALPHA:
+        mAlphaStride = 4;
+        break;
+    case GL_BGRA_EXT:
+        mAlphaStride = 4;
+        break;
+    default:
+        break;
+    }
 
 	mAlphaOffset = -1 ;
 	if (mFormatType == GL_UNSIGNED_BYTE)
@@ -1968,12 +2048,13 @@ void LLImageGL::updatePickMask(S32 width, S32 height, const U8* data_in)
 
 	freePickMask();
 
-	if (mFormatType != GL_UNSIGNED_BYTE ||
-	    mFormatPrimary != GL_RGBA)
-	{
-		//cannot generate a pick mask for this texture
-		return;
-	}
+    if (mFormatType != GL_UNSIGNED_BYTE ||
+        ((mFormatPrimary != GL_RGBA)
+      && (mFormatPrimary != GL_SRGB_ALPHA)))
+    {
+        //cannot generate a pick mask for this texture
+        return;
+    }
 
 #ifdef SHOW_ASSERT
 	const U32 pickSize = createPickMask(width, height);
diff --git a/indra/llrender/llimagegl.h b/indra/llrender/llimagegl.h
index 2be54be062..4f3d7eed0a 100644
--- a/indra/llrender/llimagegl.h
+++ b/indra/llrender/llimagegl.h
@@ -84,7 +84,10 @@ public:
 	LLImageGL(BOOL usemipmaps = TRUE);
 	LLImageGL(U32 width, U32 height, U8 components, BOOL usemipmaps = TRUE);
 	LLImageGL(const LLImageRaw* imageraw, BOOL usemipmaps = TRUE);
-	
+
+    // For wrapping textures created via GL elsewhere with our API only. Use with caution.
+    LLImageGL(LLGLuint mTexName, U32 components, LLGLenum target, LLGLint  formatInternal, LLGLenum formatPrimary, LLGLenum formatType, LLTexUnit::eTextureAddressMode addressMode);
+
 protected:
 	virtual ~LLImageGL();
 
@@ -234,6 +237,8 @@ protected:
 	LLGLenum mFormatType;
 	BOOL	 mFormatSwapBytes;// if true, use glPixelStorei(GL_UNPACK_SWAP_BYTES, 1)
 	
+    BOOL mExternalTexture;
+
 	// STATICS
 public:	
 	static std::set<LLImageGL*> sImageList;
@@ -279,6 +284,8 @@ public:
 	void setCategory(S32 category) {mCategory = category;}
 	S32  getCategory()const {return mCategory;}
 	
+    void setTexName(GLuint texName) { mTexName = texName; }
+
 	//for debug use: show texture size distribution 
 	//----------------------------------------
 	static S32 sCurTexSizeBar ;
diff --git a/indra/llrender/llrender.cpp b/indra/llrender/llrender.cpp
index 5bcccb35af..c3345c5c16 100644
--- a/indra/llrender/llrender.cpp
+++ b/indra/llrender/llrender.cpp
@@ -59,7 +59,8 @@ static const GLenum sGLTextureType[] =
 	GL_TEXTURE_2D,
 	GL_TEXTURE_RECTANGLE_ARB,
 	GL_TEXTURE_CUBE_MAP_ARB,
-	GL_TEXTURE_2D_MULTISAMPLE
+	GL_TEXTURE_2D_MULTISAMPLE,
+    GL_TEXTURE_3D
 };
 
 static const GLint sGLAddressMode[] =
@@ -104,7 +105,7 @@ LLTexUnit::LLTexUnit(S32 index)
 	mCurrColorOp(TBO_MULT), mCurrAlphaOp(TBO_MULT),
 	mCurrColorSrc1(TBS_TEX_COLOR), mCurrColorSrc2(TBS_PREV_COLOR),
 	mCurrAlphaSrc1(TBS_TEX_ALPHA), mCurrAlphaSrc2(TBS_PREV_ALPHA),
-	mCurrColorScale(1), mCurrAlphaScale(1), mCurrTexture(0),
+    mCurrColorScale(1), mCurrAlphaScale(1), mCurrTexture(0), mTexColorSpace(TCS_LINEAR),
 	mHasMipMaps(false),
 	mIndex(index)
 {
@@ -161,6 +162,8 @@ void LLTexUnit::refreshState(void)
 		setTextureCombiner(mCurrColorOp, mCurrColorSrc1, mCurrColorSrc2, false);
 		setTextureCombiner(mCurrAlphaOp, mCurrAlphaSrc1, mCurrAlphaSrc2, true);
 	}
+
+    setTextureColorSpace(mTexColorSpace);
 }
 
 void LLTexUnit::activate(void)
@@ -218,6 +221,8 @@ void LLTexUnit::disable(void)
 		{
 			glDisable(sGLTextureType[mCurrTexType]);
 		}
+
+        setTextureColorSpace(TCS_LINEAR);
 		
 		mCurrTexType = TT_NONE;
 	}
@@ -254,7 +259,8 @@ bool LLTexUnit::bind(LLTexture* texture, bool for_rendering, bool forceBind)
 						gl_tex->mTexOptionsDirty = false;
 						setTextureAddressMode(gl_tex->mAddressMode);
 						setTextureFilteringOption(gl_tex->mFilterOption);
-					}
+                    }
+                    setTextureColorSpace(mTexColorSpace);
 				}
 			}
 			else
@@ -329,6 +335,7 @@ bool LLTexUnit::bind(LLImageGL* texture, bool for_rendering, bool forceBind)
 			setTextureFilteringOption(texture->mFilterOption);
 			stop_glerror();
 		}
+        setTextureColorSpace(mTexColorSpace);
 	}
 
 	stop_glerror();
@@ -354,7 +361,7 @@ bool LLTexUnit::bind(LLCubeMap* cubeMap)
 		{
 			activate();
 			enable(LLTexUnit::TT_CUBE_MAP);
-			mCurrTexture = cubeMap->mImages[0]->getTexName();
+            mCurrTexture = cubeMap->mImages[0]->getTexName();
 			glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, mCurrTexture);
 			mHasMipMaps = cubeMap->mImages[0]->mHasMipMaps;
 			cubeMap->mImages[0]->updateBindStats(cubeMap->mImages[0]->mTextureMemory);
@@ -363,7 +370,8 @@ bool LLTexUnit::bind(LLCubeMap* cubeMap)
 				cubeMap->mImages[0]->mTexOptionsDirty = false;
 				setTextureAddressMode(cubeMap->mImages[0]->mAddressMode);
 				setTextureFilteringOption(cubeMap->mImages[0]->mFilterOption);
-			}
+            }
+            setTextureColorSpace(mTexColorSpace);
 			return true;
 		}
 		else
@@ -414,7 +422,8 @@ bool LLTexUnit::bindManual(eTextureType type, U32 texture, bool hasMips)
 		enable(type);
 		mCurrTexture = texture;
 		glBindTexture(sGLTextureType[type], texture);
-		mHasMipMaps = hasMips;
+        mHasMipMaps = hasMips;
+        setTextureColorSpace(mTexColorSpace);
 	}
 	return true;
 }
@@ -434,6 +443,9 @@ void LLTexUnit::unbind(eTextureType type)
 	if (mCurrTexType == type)
 	{
 		mCurrTexture = 0;
+
+        // Always make sure our texture color space is reset to linear.  SRGB sampling should be opt-in in the vast majority of cases.  Also prevents color space "popping".
+        mTexColorSpace = TCS_LINEAR;
 		if (LLGLSLShader::sNoFixedFunction && type == LLTexUnit::TT_TEXTURE)
 		{
 			glBindTexture(sGLTextureType[type], sWhiteTexture);
@@ -837,6 +849,28 @@ void LLTexUnit::debugTextureUnit(void)
 	}
 }
 
+void LLTexUnit::setTextureColorSpace(eTextureColorSpace space) {
+    mTexColorSpace = space;
+
+#if USE_SRGB_DECODE
+    if (gGLManager.mHasTexturesRGBDecode) {
+
+        if (space == TCS_SRGB) {
+            glTexParameteri(sGLTextureType[mCurrTexType], GL_TEXTURE_SRGB_DECODE_EXT, GL_DECODE_EXT);
+        }
+        else {
+            glTexParameteri(sGLTextureType[mCurrTexType], GL_TEXTURE_SRGB_DECODE_EXT, GL_SKIP_DECODE_EXT);
+        }
+
+        if (gDebugGL) {
+            assert_glerror();
+        }
+    }
+#endif
+    glTexParameteri(sGLTextureType[mCurrTexType], GL_TEXTURE_SRGB_DECODE_EXT, GL_SKIP_DECODE_EXT);
+
+}
+
 LLLightState::LLLightState(S32 index)
 : mIndex(index),
   mEnabled(false),
@@ -849,9 +883,12 @@ LLLightState::LLLightState(S32 index)
 	if (mIndex == 0)
 	{
 		mDiffuse.set(1,1,1,1);
+        mDiffuseB.set(0,0,0,0);
 		mSpecular.set(1,1,1,1);
 	}
 
+    mSunIsPrimary = true;
+
 	mAmbient.set(0,0,0,1);
 	mPosition.set(0,0,1,0);
 	mSpotDirection.set(0,0,-1);
@@ -894,6 +931,24 @@ void LLLightState::setDiffuse(const LLColor4& diffuse)
 	}
 }
 
+void LLLightState::setDiffuseB(const LLColor4& diffuse)
+{
+    if (mDiffuseB != diffuse)
+	{
+		++gGL.mLightHash;
+		mDiffuseB = diffuse;
+	}
+}
+
+void LLLightState::setSunPrimary(bool v)
+{
+    if (mSunIsPrimary != v)
+    {
+        ++gGL.mLightHash;
+		mSunIsPrimary = v;
+    }
+}
+
 void LLLightState::setAmbient(const LLColor4& ambient)
 {
 	if (mAmbient != ambient)
@@ -1150,8 +1205,10 @@ void LLRender::syncLightState()
 
 		LLVector4 position[8];
 		LLVector3 direction[8];
-		LLVector3 attenuation[8];
+		LLVector4 attenuation[8];
 		LLVector3 diffuse[8];
+        LLVector3 diffuse_b[8];
+        bool      sun_primary[8];
 
 		for (U32 i = 0; i < 8; i++)
 		{
@@ -1159,17 +1216,21 @@ void LLRender::syncLightState()
 
 			position[i] = light->mPosition;
 			direction[i] = light->mSpotDirection;
-			attenuation[i].set(light->mLinearAtten, light->mQuadraticAtten, light->mSpecular.mV[3]);
+            attenuation[i].set(light->mLinearAtten, light->mQuadraticAtten, light->mSpecular.mV[2], light->mSpecular.mV[3]);
 			diffuse[i].set(light->mDiffuse.mV);
+            diffuse_b[i].set(light->mDiffuseB.mV);
+            sun_primary[i] = light->mSunIsPrimary;
 		}
 
 		shader->uniform4fv(LLShaderMgr::LIGHT_POSITION, 8, position[0].mV);
 		shader->uniform3fv(LLShaderMgr::LIGHT_DIRECTION, 8, direction[0].mV);
-		shader->uniform3fv(LLShaderMgr::LIGHT_ATTENUATION, 8, attenuation[0].mV);
+		shader->uniform4fv(LLShaderMgr::LIGHT_ATTENUATION, 8, attenuation[0].mV);
 		shader->uniform3fv(LLShaderMgr::LIGHT_DIFFUSE, 8, diffuse[0].mV);
 		shader->uniform4fv(LLShaderMgr::LIGHT_AMBIENT, 1, mAmbientLightColor.mV);
-		//HACK -- duplicate sunlight color for compatibility with drivers that can't deal with multiple shader objects referencing the same uniform
-		shader->uniform4fv(LLShaderMgr::SUNLIGHT_COLOR, 1, diffuse[0].mV);
+        shader->uniform1i(LLShaderMgr::SUN_UP_FACTOR, sun_primary[0] ? 1 : 0);
+        shader->uniform4fv(LLShaderMgr::AMBIENT, 1, mAmbientLightColor.mV);
+        shader->uniform4fv(LLShaderMgr::SUNLIGHT_COLOR, 1, diffuse[0].mV);
+        shader->uniform4fv(LLShaderMgr::MOONLIGHT_COLOR, 1, diffuse_b[0].mV);
 	}
 }
 
@@ -1190,6 +1251,7 @@ void LLRender::syncMatrices()
 	LLGLSLShader* shader = LLGLSLShader::sCurBoundShaderPtr;
 
 	static glh::matrix4f cached_mvp;
+    static glh::matrix4f cached_inv_mdv;
 	static U32 cached_mvp_mdv_hash = 0xFFFFFFFF;
 	static U32 cached_mvp_proj_hash = 0xFFFFFFFF;
 	
@@ -1203,12 +1265,18 @@ void LLRender::syncMatrices()
 		bool mvp_done = false;
 
 		U32 i = MM_MODELVIEW;
-		if (mMatHash[i] != shader->mMatHash[i])
+		if (mMatHash[MM_MODELVIEW] != shader->mMatHash[MM_MODELVIEW])
 		{ //update modelview, normal, and MVP
-			glh::matrix4f& mat = mMatrix[i][mMatIdx[i]];
+			glh::matrix4f& mat = mMatrix[MM_MODELVIEW][mMatIdx[MM_MODELVIEW]];
 
-			shader->uniformMatrix4fv(name[i], 1, GL_FALSE, mat.m);
-			shader->mMatHash[i] = mMatHash[i];
+            // if MDV has changed, update the cached inverse as well
+            if (cached_mvp_mdv_hash != mMatHash[MM_MODELVIEW])
+            {
+                cached_inv_mdv = mat.inverse();
+            }
+
+			shader->uniformMatrix4fv(name[MM_MODELVIEW], 1, GL_FALSE, mat.m);
+			shader->mMatHash[MM_MODELVIEW] = mMatHash[MM_MODELVIEW];
 
 			//update normal matrix
 			S32 loc = shader->getUniformLocation(LLShaderMgr::NORMAL_MATRIX);
@@ -1216,7 +1284,7 @@ void LLRender::syncMatrices()
 			{
 				if (cached_normal_hash != mMatHash[i])
 				{
-					cached_normal = mat.inverse().transpose();
+					cached_normal = cached_inv_mdv.transpose();
 					cached_normal_hash = mMatHash[i];
 				}
 
@@ -1232,6 +1300,11 @@ void LLRender::syncMatrices()
 				shader->uniformMatrix3fv(LLShaderMgr::NORMAL_MATRIX, 1, GL_FALSE, norm_mat);
 			}
 
+            if (shader->getUniformLocation(LLShaderMgr::INVERSE_MODELVIEW_MATRIX))
+            {                
+	            shader->uniformMatrix4fv(LLShaderMgr::INVERSE_MODELVIEW_MATRIX, 1, GL_FALSE, cached_inv_mdv.m); 
+            }
+
 			//update MVP matrix
 			mvp_done = true;
 			loc = shader->getUniformLocation(LLShaderMgr::MODELVIEW_PROJECTION_MATRIX);
@@ -1251,14 +1324,21 @@ void LLRender::syncMatrices()
 			}
 		}
 
-
 		i = MM_PROJECTION;
-		if (mMatHash[i] != shader->mMatHash[i])
+		if (mMatHash[MM_PROJECTION] != shader->mMatHash[MM_PROJECTION])
 		{ //update projection matrix, normal, and MVP
-			glh::matrix4f& mat = mMatrix[i][mMatIdx[i]];
+			glh::matrix4f& mat = mMatrix[MM_PROJECTION][mMatIdx[MM_PROJECTION]];
+
+            // it would be nice to have this automatically track the state of the proj matrix
+            // but certain render paths (deferred lighting) require it to be mismatched *sigh*
+            //if (shader->getUniformLocation(LLShaderMgr::INVERSE_PROJECTION_MATRIX))
+            //{
+	        //    glh::matrix4f inv_proj = mat.inverse();
+	        //    shader->uniformMatrix4fv(LLShaderMgr::INVERSE_PROJECTION_MATRIX, 1, FALSE, inv_proj.m);
+            //}
 
-			shader->uniformMatrix4fv(name[i], 1, GL_FALSE, mat.m);
-			shader->mMatHash[i] = mMatHash[i];
+			shader->uniformMatrix4fv(name[MM_PROJECTION], 1, GL_FALSE, mat.m);
+			shader->mMatHash[MM_PROJECTION] = mMatHash[MM_PROJECTION];
 
 			if (!mvp_done)
 			{
@@ -1266,7 +1346,7 @@ void LLRender::syncMatrices()
 				S32 loc = shader->getUniformLocation(LLShaderMgr::MODELVIEW_PROJECTION_MATRIX);
 				if (loc > -1)
 				{
-					if (cached_mvp_mdv_hash != mMatHash[i] || cached_mvp_proj_hash != mMatHash[MM_PROJECTION])
+					if (cached_mvp_mdv_hash != mMatHash[MM_PROJECTION] || cached_mvp_proj_hash != mMatHash[MM_PROJECTION])
 					{
 						U32 mdv = MM_MODELVIEW;
 						cached_mvp = mat;
@@ -1290,7 +1370,7 @@ void LLRender::syncMatrices()
 		}
 
 
-		if (shader->mFeatures.hasLighting || shader->mFeatures.calculatesLighting)
+		if (shader->mFeatures.hasLighting || shader->mFeatures.calculatesLighting || shader->mFeatures.calculatesAtmospherics)
 		{ //also sync light state
 			syncLightState();
 		}
@@ -1307,7 +1387,7 @@ void LLRender::syncMatrices()
 			GL_TEXTURE,
 		};
 
-		for (U32 i = 0; i < 2; ++i)
+		for (U32 i = 0; i < MM_TEXTURE0; ++i)
 		{
 			if (mMatHash[i] != mCurMatHash[i])
 			{
@@ -1317,11 +1397,11 @@ void LLRender::syncMatrices()
 			}
 		}
 
-		for (U32 i = 2; i < NUM_MATRIX_MODES; ++i)
+		for (U32 i = MM_TEXTURE0; i < NUM_MATRIX_MODES; ++i)
 		{
 			if (mMatHash[i] != mCurMatHash[i])
 			{
-				gGL.getTexUnit(i-2)->activate();
+				gGL.getTexUnit(i-MM_TEXTURE0)->activate();
 				glMatrixMode(mode[i]);
 				glLoadMatrixf(mMatrix[i][mMatIdx[i]].m);
 				mCurMatHash[i] = mMatHash[i];
@@ -1453,24 +1533,20 @@ void LLRender::multMatrix(const GLfloat* m)
 	}
 }
 
-void LLRender::matrixMode(U32 mode)
+void LLRender::matrixMode(eMatrixMode mode)
 {
 	if (mode == MM_TEXTURE)
 	{
-		mode = MM_TEXTURE0 + gGL.getCurrentTexUnitIndex();
-		if (mode > MM_TEXTURE3)
-		{
-			// getCurrentTexUnitIndex() can go as high as 32 (LL_NUM_TEXTURE_LAYERS)
-			// Large value will result in a crash at mMatrix
-			LL_WARNS_ONCE() << "Attempted to assign matrix mode out of bounds: " << mode << LL_ENDL;
-			mode = MM_TEXTURE0;
-		}
+        U32 tex_index = gGL.getCurrentTexUnitIndex();
+        // the shaders don't actually reference anything beyond texture_matrix0/1 outside of terrain rendering
+        llassert_always(tex_index <= 3);
+		mode = eMatrixMode(MM_TEXTURE0 + gGL.getCurrentTexUnitIndex());
 	}
 
 	mMatrixMode = mode;
 }
 
-U32 LLRender::getMatrixMode()
+LLRender::eMatrixMode LLRender::getMatrixMode()
 {
 	if (mMatrixMode >= MM_TEXTURE0 && mMatrixMode <= MM_TEXTURE3)
 	{ //always return MM_TEXTURE if current matrix mode points at any texture matrix
@@ -2337,3 +2413,85 @@ void LLRender::debugTexUnits(void)
 	LL_INFOS("TextureUnit") << "Active TexUnit Enabled : " << active_enabled << LL_ENDL;
 }
 
+
+
+glh::matrix4f copy_matrix(F32* src)
+{
+	glh::matrix4f ret;
+	ret.set_value(src);
+	return ret;
+}
+
+glh::matrix4f get_current_modelview()
+{
+	return copy_matrix(gGLModelView);
+}
+
+glh::matrix4f get_current_projection()
+{
+	return copy_matrix(gGLProjection);
+}
+
+glh::matrix4f get_last_modelview()
+{
+	return copy_matrix(gGLLastModelView);
+}
+
+glh::matrix4f get_last_projection()
+{
+	return copy_matrix(gGLLastProjection);
+}
+
+void copy_matrix(const glh::matrix4f& src, F32* dst)
+{
+	for (U32 i = 0; i < 16; i++)
+	{
+		dst[i] = src.m[i];
+	}
+}
+
+void set_current_modelview(const glh::matrix4f& mat)
+{
+	copy_matrix(mat, gGLModelView);
+}
+
+void set_current_projection(glh::matrix4f& mat)
+{
+	copy_matrix(mat, gGLProjection);
+}
+
+glh::matrix4f gl_ortho(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat znear, GLfloat zfar)
+{
+	glh::matrix4f ret(
+		2.f/(right-left), 0.f, 0.f, -(right+left)/(right-left),
+		0.f, 2.f/(top-bottom), 0.f, -(top+bottom)/(top-bottom),
+		0.f, 0.f, -2.f/(zfar-znear),  -(zfar+znear)/(zfar-znear),
+		0.f, 0.f, 0.f, 1.f);
+
+	return ret;
+}
+
+glh::matrix4f gl_perspective(GLfloat fovy, GLfloat aspect, GLfloat zNear, GLfloat zFar)
+{
+	GLfloat f = 1.f/tanf(DEG_TO_RAD*fovy/2.f);
+
+	return glh::matrix4f(f/aspect, 0, 0, 0,
+						 0, f, 0, 0,
+						 0, 0, (zFar+zNear)/(zNear-zFar), (2.f*zFar*zNear)/(zNear-zFar),
+						 0, 0, -1.f, 0);
+}
+
+glh::matrix4f gl_lookat(LLVector3 eye, LLVector3 center, LLVector3 up)
+{
+	LLVector3 f = center-eye;
+	f.normVec();
+	up.normVec();
+	LLVector3 s = f % up;
+	LLVector3 u = s % f;
+
+	return glh::matrix4f(s[0], s[1], s[2], 0,
+					  u[0], u[1], u[2], 0,
+					  -f[0], -f[1], -f[2], 0,
+					  0, 0, 0, 1);
+	
+}
diff --git a/indra/llrender/llrender.h b/indra/llrender/llrender.h
index 32bb728d8a..41f4fe4017 100644
--- a/indra/llrender/llrender.h
+++ b/indra/llrender/llrender.h
@@ -61,10 +61,11 @@ public:
 	typedef enum
 	{
 		TT_TEXTURE = 0,			// Standard 2D Texture
-		TT_RECT_TEXTURE,	// Non power of 2 texture
-		TT_CUBE_MAP,		// 6-sided cube map texture
+		TT_RECT_TEXTURE,	    // Non power of 2 texture
+		TT_CUBE_MAP,		    // 6-sided cube map texture
 		TT_MULTISAMPLE_TEXTURE, // see GL_ARB_texture_multisample
-		TT_NONE 		// No texture type is currently enabled
+        TT_TEXTURE_3D,          // standard 3D Texture
+		TT_NONE, 		        // No texture type is currently enabled        
 	} eTextureType;
 
 	typedef enum
@@ -130,6 +131,12 @@ public:
 		TBS_ONE_MINUS_CONST_ALPHA
 	} eTextureBlendSrc;
 
+    typedef enum
+    {
+        TCS_LINEAR = 0,
+        TCS_SRGB
+    } eTextureColorSpace;
+
 	LLTexUnit(S32 index);
 
 	// Refreshes renderer state of the texture unit to the cached values
@@ -152,7 +159,7 @@ public:
 	// Binds the LLImageGL to this texture unit 
 	// (automatically enables the unit for the LLImageGL's texture type)
 	bool bind(LLImageGL* texture, bool for_rendering = false, bool forceBind = false);
-	bool bind(LLTexture* texture, bool for_rendering = false, bool forceBind = false);
+    bool bind(LLTexture* texture, bool for_rendering = false, bool forceBind = false);
 
 	// Binds a cubemap to this texture unit 
 	// (automatically enables the texture unit for cubemaps)
@@ -197,6 +204,10 @@ public:
 
 	void setHasMipMaps(bool hasMips) { mHasMipMaps = hasMips; }
 
+    void setTextureColorSpace(eTextureColorSpace space);
+
+    eTextureColorSpace getCurrColorSpace() { return mTexColorSpace; }
+
 protected:
 	const S32			mIndex;
 	U32					mCurrTexture;
@@ -208,6 +219,7 @@ protected:
 	eTextureBlendOp		mCurrAlphaOp;
 	eTextureBlendSrc	mCurrAlphaSrc1;
 	eTextureBlendSrc	mCurrAlphaSrc2;
+    eTextureColorSpace  mTexColorSpace;
 	S32					mCurrColorScale;
 	S32					mCurrAlphaScale;
 	bool				mHasMipMaps;
@@ -228,6 +240,7 @@ public:
 	void enable();
 	void disable();
 	void setDiffuse(const LLColor4& diffuse);
+    void setDiffuseB(const LLColor4& diffuse);
 	void setAmbient(const LLColor4& ambient);
 	void setSpecular(const LLColor4& specular);
 	void setPosition(const LLVector4& position);
@@ -237,6 +250,7 @@ public:
 	void setSpotExponent(const F32& exponent);
 	void setSpotCutoff(const F32& cutoff);
 	void setSpotDirection(const LLVector3& direction);
+    void setSunPrimary(bool v);
 
 protected:
 	friend class LLRender;
@@ -244,6 +258,8 @@ protected:
 	S32 mIndex;
 	bool mEnabled;
 	LLColor4 mDiffuse;
+    LLColor4 mDiffuseB;
+    bool     mSunIsPrimary;
 	LLColor4 mAmbient;
 	LLColor4 mSpecular;
 	LLVector4 mPosition;
@@ -264,10 +280,11 @@ public:
 
 	enum eTexIndex
 	{
-		DIFFUSE_MAP = 0,
-		NORMAL_MAP,
-		SPECULAR_MAP,
-		NUM_TEXTURE_CHANNELS,
+		DIFFUSE_MAP           = 0,
+        ALTERNATE_DIFFUSE_MAP = 1,
+		NORMAL_MAP            = 1,
+		SPECULAR_MAP          = 2,        
+		NUM_TEXTURE_CHANNELS  = 3,
 	};
 
 	enum eVolumeTexIndex
@@ -360,8 +377,8 @@ public:
 	void loadMatrix(const GLfloat* m);
 	void loadIdentity();
 	void multMatrix(const GLfloat* m);
-	void matrixMode(U32 mode);	
-	U32 getMatrixMode();
+	void matrixMode(eMatrixMode mode);	
+	eMatrixMode getMatrixMode();
 
 	const glh::matrix4f& getModelviewMatrix();
 	const glh::matrix4f& getProjectionMatrix();
@@ -450,7 +467,7 @@ public:
 private:
 	friend class LLLightState;
 
-	U32 mMatrixMode;
+	eMatrixMode mMatrixMode;
 	U32 mMatIdx[NUM_MATRIX_MODES];
 	U32 mMatHash[NUM_MATRIX_MODES];
 	glh::matrix4f mMatrix[NUM_MATRIX_MODES][LL_MATRIX_STACK_DEPTH];
@@ -495,4 +512,33 @@ extern S32 gGLViewport[4];
 
 extern LLRender gGL;
 
+// This rotation matrix moves the default OpenGL reference frame 
+// (-Z at, Y up) to Cory's favorite reference frame (X at, Z up)
+const F32 OGL_TO_CFR_ROTATION[16] = {  0.f,  0.f, -1.f,  0.f, 	// -Z becomes X
+									  -1.f,  0.f,  0.f,  0.f, 	// -X becomes Y
+									   0.f,  1.f,  0.f,  0.f,	//  Y becomes Z
+									   0.f,  0.f,  0.f,  1.f };
+
+glh::matrix4f copy_matrix(F32* src);
+glh::matrix4f get_current_modelview();
+glh::matrix4f get_current_projection();
+glh::matrix4f get_last_modelview();
+glh::matrix4f get_last_projection();
+
+void copy_matrix(const glh::matrix4f& src, F32* dst);
+void set_current_modelview(const glh::matrix4f& mat);
+void set_current_projection(glh::matrix4f& mat);
+
+glh::matrix4f gl_ortho(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat znear, GLfloat zfar);
+glh::matrix4f gl_perspective(GLfloat fovy, GLfloat aspect, GLfloat zNear, GLfloat zFar);
+glh::matrix4f gl_lookat(LLVector3 eye, LLVector3 center, LLVector3 up);
+
+#if LL_RELEASE_FOR_DOWNLOAD
+    #define LL_SHADER_LOADING_WARNS(...) LL_WARNS_ONCE("ShaderLoading")
+    #define LL_SHADER_UNIFORM_ERRS(...)  LL_WARNS_ONCE("Shader")
+#else
+    #define LL_SHADER_LOADING_WARNS(...) LL_WARNS()
+    #define LL_SHADER_UNIFORM_ERRS(...)  LL_ERRS("Shader")    
+#endif
+
 #endif
diff --git a/indra/llrender/llrendertarget.cpp b/indra/llrender/llrendertarget.cpp
index cd484b4fe9..9fb4f7f2b0 100644
--- a/indra/llrender/llrendertarget.cpp
+++ b/indra/llrender/llrendertarget.cpp
@@ -502,9 +502,26 @@ U32 LLRenderTarget::getNumTextures() const
 }
 
 
-void LLRenderTarget::bindTexture(U32 index, S32 channel)
+void LLRenderTarget::bindTexture(U32 index, S32 channel, LLTexUnit::eTextureFilterOptions filter_options)
 {
 	gGL.getTexUnit(channel)->bindManual(mUsage, getTexture(index));
+
+    bool isSRGB = false;
+    llassert(mInternalFormat.size() > index);
+    switch (mInternalFormat[index])
+    {
+        case GL_SRGB_ALPHA:
+        case GL_SRGB:
+        case GL_SRGB8_ALPHA8:
+            isSRGB = true;
+        break;
+
+        default:
+        break;
+    }
+
+    gGL.getTexUnit(channel)->setTextureFilteringOption(filter_options);
+    gGL.getTexUnit(channel)->setTextureColorSpace(isSRGB ? LLTexUnit::TCS_SRGB : LLTexUnit::TCS_LINEAR);
 }
 
 void LLRenderTarget::flush(bool fetch_depth)
diff --git a/indra/llrender/llrendertarget.h b/indra/llrender/llrendertarget.h
index 6dc84d978d..6c07ac5b1c 100644
--- a/indra/llrender/llrendertarget.h
+++ b/indra/llrender/llrendertarget.h
@@ -120,7 +120,7 @@ public:
 	U32 getDepth(void) const { return mDepth; }
 	bool hasStencil() const { return mStencil; }
 
-	void bindTexture(U32 index, S32 channel);
+	void bindTexture(U32 index, S32 channel, LLTexUnit::eTextureFilterOptions filter_options = LLTexUnit::TFO_BILINEAR);
 
 	//flush rendering operations
 	//must be called when rendering is complete
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index 643c368870..1383020873 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -25,22 +25,14 @@
  */
 
 #include "linden_common.h"
-
 #include "llshadermgr.h"
-
-#include "llfile.h"
 #include "llrender.h"
+#include "llfile.h"
 
 #if LL_DARWIN
 #include "OpenGL/OpenGL.h"
 #endif
 
-#ifdef LL_RELEASE_FOR_DOWNLOAD
-#define UNIFORM_ERRS LL_WARNS_ONCE("Shader")
-#else
-#define UNIFORM_ERRS LL_ERRS("Shader")
-#endif
-
 // Lots of STL stuff in here, using namespace std to keep things more readable
 using std::vector;
 using std::pair;
@@ -87,20 +79,20 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	{
 		if (features->hasWaterFog)
 		{
-			if (!shader->attachObject("windlight/atmosphericsVarsWaterV.glsl"))
+			if (!shader->attachVertexObject("windlight/atmosphericsVarsWaterV.glsl"))
 			{
 				return FALSE;
 			}
 		}
-		else if (!shader->attachObject("windlight/atmosphericsVarsV.glsl"))
+        else if (!shader->attachVertexObject("windlight/atmosphericsVarsV.glsl"))
 		{
 			return FALSE;
 		}
 	}
 
-	if (features->calculatesLighting || features->atmosphericHelpers)
+	if (features->calculatesLighting || features->calculatesAtmospherics)
 	{
-		if (!shader->attachObject("windlight/atmosphericsHelpersV.glsl"))
+		if (!shader->attachVertexObject("windlight/atmosphericsHelpersV.glsl"))
 		{
 			return FALSE;
 		}
@@ -110,40 +102,40 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	{
 		if (features->isSpecular)
 		{
-			if (!shader->attachObject("lighting/lightFuncSpecularV.glsl"))
+            if (!shader->attachVertexObject("lighting/lightFuncSpecularV.glsl"))
 			{
 				return FALSE;
 			}
 		
 			if (!features->isAlphaLighting)
 			{
-				if (!shader->attachObject("lighting/sumLightsSpecularV.glsl"))
+                if (!shader->attachVertexObject("lighting/sumLightsSpecularV.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			
-			if (!shader->attachObject("lighting/lightSpecularV.glsl"))
+            if (!shader->attachVertexObject("lighting/lightSpecularV.glsl"))
 			{
 				return FALSE;
 			}
 		}
 		else 
 		{
-			if (!shader->attachObject("lighting/lightFuncV.glsl"))
+            if (!shader->attachVertexObject("lighting/lightFuncV.glsl"))
 			{
 				return FALSE;
 			}
 			
 			if (!features->isAlphaLighting)
 			{
-				if (!shader->attachObject("lighting/sumLightsV.glsl"))
+                if (!shader->attachVertexObject("lighting/sumLightsV.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			
-			if (!shader->attachObject("lighting/lightV.glsl"))
+            if (!shader->attachVertexObject("lighting/lightV.glsl"))
 			{
 				return FALSE;
 			}
@@ -152,8 +144,12 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	
 	// NOTE order of shader object attaching is VERY IMPORTANT!!!
 	if (features->calculatesAtmospherics)
-	{
-		if (!shader->attachObject("windlight/atmosphericsV.glsl"))
+    {
+        if (!shader->attachVertexObject("windlight/atmosphericsFuncs.glsl")) {
+            return FALSE;
+        }
+
+        if (!shader->attachVertexObject("windlight/atmosphericsV.glsl"))
 		{
 			return FALSE;
 		}
@@ -161,7 +157,7 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 
 	if (features->hasSkinning)
 	{
-		if (!shader->attachObject("avatar/avatarSkinV.glsl"))
+        if (!shader->attachVertexObject("avatar/avatarSkinV.glsl"))
 		{
 			return FALSE;
 		}
@@ -169,7 +165,7 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 
 	if (features->hasObjectSkinning)
 	{
-		if (!shader->attachObject("avatar/objectSkinV.glsl"))
+        if (!shader->attachVertexObject("avatar/objectSkinV.glsl"))
 		{
 			return FALSE;
 		}
@@ -179,33 +175,95 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	// Attach Fragment Shader Features Next
 	///////////////////////////////////////
 
+// NOTE order of shader object attaching is VERY IMPORTANT!!!
+
 	if(features->calculatesAtmospherics)
 	{
 		if (features->hasWaterFog)
 		{
-			if (!shader->attachObject("windlight/atmosphericsVarsWaterF.glsl"))
+			if (!shader->attachFragmentObject("windlight/atmosphericsVarsWaterF.glsl"))
 			{
 				return FALSE;
 			}
 		}
-		else if (!shader->attachObject("windlight/atmosphericsVarsF.glsl"))
+        else if (!shader->attachFragmentObject("windlight/atmosphericsVarsF.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->calculatesLighting || features->calculatesAtmospherics)
+	{
+        if (!shader->attachFragmentObject("windlight/atmosphericsHelpersF.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    // we want this BEFORE shadows and AO because those facilities use pos/norm access
+    if (features->isDeferred)
+	{
+        if (!shader->attachFragmentObject("deferred/deferredUtil.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->hasShadows)
+	{
+        if (!shader->attachFragmentObject("deferred/shadowUtil.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->hasAmbientOcclusion)
+	{
+        if (!shader->attachFragmentObject("deferred/aoUtil.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->hasIndirect)
+	{
+        if (!shader->attachFragmentObject("deferred/indirect.glsl"))
 		{
 			return FALSE;
 		}
 	}
 
-	// NOTE order of shader object attaching is VERY IMPORTANT!!!
 	if (features->hasGamma)
 	{
-		if (!shader->attachObject("windlight/gammaF.glsl"))
+        if (!shader->attachFragmentObject("windlight/gammaF.glsl"))
 		{
 			return FALSE;
 		}
 	}
-	
-	if (features->hasAtmospherics)
+
+	if (features->hasSrgb)
 	{
-		if (!shader->attachObject("windlight/atmosphericsF.glsl"))
+        if (!shader->attachFragmentObject("environment/srgbF.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+    if (features->encodesNormal)
+	{
+        if (!shader->attachFragmentObject("environment/encodeNormF.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
+	if (features->hasAtmospherics)
+    {
+        if (!shader->attachFragmentObject("windlight/atmosphericsFuncs.glsl")) {
+            return FALSE;
+        }
+
+        if (!shader->attachFragmentObject("windlight/atmosphericsF.glsl"))
 		{
 			return FALSE;
 		}
@@ -213,7 +271,7 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	
 	if (features->hasTransport)
 	{
-		if (!shader->attachObject("windlight/transportF.glsl"))
+        if (!shader->attachFragmentObject("windlight/transportF.glsl"))
 		{
 			return FALSE;
 		}
@@ -225,7 +283,7 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 	// NOTE order of shader object attaching is VERY IMPORTANT!!!
 	if (features->hasWaterFog)
 	{
-		if (!shader->attachObject("environment/waterFogF.glsl"))
+        if (!shader->attachFragmentObject("environment/waterFogF.glsl"))
 		{
 			return FALSE;
 		}
@@ -239,14 +297,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightWaterAlphaMaskNonIndexedF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightWaterAlphaMaskNonIndexedF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightWaterNonIndexedF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightWaterNonIndexedF.glsl"))
 					{
 						return FALSE;
 					}
@@ -256,14 +314,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightWaterAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightWaterAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightWaterF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightWaterF.glsl"))
 					{
 						return FALSE;
 					}
@@ -278,14 +336,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightAlphaMaskNonIndexedF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightAlphaMaskNonIndexedF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightNonIndexedF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightNonIndexedF.glsl"))
 					{
 						return FALSE;
 					}
@@ -295,14 +353,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightF.glsl"))
 					{
 						return FALSE;
 					}
@@ -320,14 +378,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		{
 			if (features->disableTextureIndex)
 			{
-				if (!shader->attachObject("lighting/lightFullbrightShinyWaterNonIndexedF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightFullbrightShinyWaterNonIndexedF.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			else 
 			{
-				if (!shader->attachObject("lighting/lightFullbrightShinyWaterF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightFullbrightShinyWaterF.glsl"))
 				{
 					return FALSE;
 				}
@@ -340,12 +398,12 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightWaterNonIndexedAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
-				else if (!shader->attachObject("lighting/lightFullbrightWaterNonIndexedF.glsl"))
+                else if (!shader->attachFragmentObject("lighting/lightFullbrightWaterNonIndexedF.glsl"))
 				{
 					return FALSE;
 				}
@@ -354,12 +412,12 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightFullbrightWaterAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightWaterAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
-				else if (!shader->attachObject("lighting/lightFullbrightWaterF.glsl"))
+                else if (!shader->attachFragmentObject("lighting/lightFullbrightWaterF.glsl"))
 				{
 					return FALSE;
 				}
@@ -371,14 +429,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		{
 			if (features->disableTextureIndex)
 			{
-				if (!shader->attachObject("lighting/lightFullbrightShinyNonIndexedF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightFullbrightShinyNonIndexedF.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			else 
 			{
-				if (!shader->attachObject("lighting/lightFullbrightShinyF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightFullbrightShinyF.glsl"))
 				{
 					return FALSE;
 				}
@@ -393,14 +451,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightFullbrightNonIndexedAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightNonIndexedAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightFullbrightNonIndexedF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightNonIndexedF.glsl"))
 					{
 						return FALSE;
 					}
@@ -410,14 +468,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			{
 				if (features->hasAlphaMask)
 				{
-					if (!shader->attachObject("lighting/lightFullbrightAlphaMaskF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightAlphaMaskF.glsl"))
 					{
 						return FALSE;
 					}
 				}
 				else
 				{
-					if (!shader->attachObject("lighting/lightFullbrightF.glsl"))
+                    if (!shader->attachFragmentObject("lighting/lightFullbrightF.glsl"))
 					{
 						return FALSE;
 					}
@@ -435,14 +493,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		{
 			if (features->disableTextureIndex)
 			{
-				if (!shader->attachObject("lighting/lightShinyWaterNonIndexedF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightShinyWaterNonIndexedF.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			else 
 			{
-				if (!shader->attachObject("lighting/lightShinyWaterF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightShinyWaterF.glsl"))
 				{
 					return FALSE;
 				}
@@ -454,14 +512,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 		{
 			if (features->disableTextureIndex)
 			{
-				if (!shader->attachObject("lighting/lightShinyNonIndexedF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightShinyNonIndexedF.glsl"))
 				{
 					return FALSE;
 				}
 			}
 			else 
 			{
-				if (!shader->attachObject("lighting/lightShinyF.glsl"))
+                if (!shader->attachFragmentObject("lighting/lightShinyF.glsl"))
 				{
 					return FALSE;
 				}
@@ -472,14 +530,14 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 
 	if (features->mIndexedTextureChannels <= 1)
 	{
-		if (!shader->attachObject("objects/nonindexedTextureV.glsl"))
+		if (!shader->attachVertexObject("objects/nonindexedTextureV.glsl"))
 		{
 			return FALSE;
 		}
 	}
 	else
 	{
-		if (!shader->attachObject("objects/indexedTextureV.glsl"))
+        if (!shader->attachVertexObject("objects/indexedTextureV.glsl"))
 		{
 			return FALSE;
 		}
@@ -509,31 +567,56 @@ static std::string get_object_log(GLhandleARB ret)
 	return res;
 }
 
+//dump shader source for debugging
+void LLShaderMgr::dumpShaderSource(U32 shader_code_count, GLcharARB** shader_code_text)
+{
+	char num_str[16]; // U32 = max 10 digits
+
+	LL_SHADER_LOADING_WARNS() << "\n";
+
+	for (U32 i = 0; i < shader_code_count; i++)
+	{
+		snprintf(num_str, sizeof(num_str), "%4d: ", i+1);
+		std::string line_number(num_str);
+		LL_CONT << line_number << shader_code_text[i];
+	}
+    LL_CONT << LL_ENDL;
+}
+
 void LLShaderMgr::dumpObjectLog(GLhandleARB ret, BOOL warns, const std::string& filename) 
 {
 	std::string log = get_object_log(ret);
+    std::string fname = filename;
+    if (filename.empty())
+    {
+        fname = "unknown shader file";
+    }
 
-	if (log.length() > 0 || warns)
+	if (log.length() > 0)
 	{
-        LL_DEBUGS("ShaderLoading") << "Shader loading ";
-        
-		if (!filename.empty())
-		{
-            LL_CONT << "From " << filename << ":\n";
-		}
-        LL_CONT << log << LL_ENDL;
+        LL_SHADER_LOADING_WARNS() << "Shader loading from " << fname << LL_ENDL;
+        LL_SHADER_LOADING_WARNS() << "\n" << log << LL_ENDL;
 	}
  }
 
 GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, boost::unordered_map<std::string, std::string>* defines, S32 texture_index_channels)
 {
+
+// endsure work-around for missing GLSL funcs gets propogated to feature shader files (e.g. srgbF.glsl)
+#if LL_DARWIN
+    if (defines)
+    {
+        (*defines)["OLD_SELECT"] = "1";
+    }
+#endif
+
 	GLenum error = GL_NO_ERROR;
 	if (gDebugGL)
 	{
 		error = glGetError();
 		if (error != GL_NO_ERROR)
 		{
-			LL_WARNS("ShaderLoading") << "GL ERROR entering loadShaderFile(): " << error << LL_ENDL;
+			LL_SHADER_LOADING_WARNS() << "GL ERROR entering loadShaderFile(): " << error << LL_ENDL;
 		}
 	}
 	
@@ -549,6 +632,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 	S32 try_gpu_class = shader_level;
 	S32 gpu_class;
 
+    std::string open_file_name;
 	//find the most relevant file
 	for (gpu_class = try_gpu_class; gpu_class > 0; gpu_class--)
 	{	//search from the current gpu class down to class 1 to find the most relevant shader
@@ -556,18 +640,33 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 		fname << getShaderDirPrefix();
 		fname << gpu_class << "/" << filename;
 		
- 		
-		file = LLFile::fopen(fname.str(), "r");		/* Flawfinder: ignore */
+        open_file_name = fname.str();
+
+        /*
+        Would be awesome, if we didn't have shaders that re-use files
+        with different environments to say, add skinning, etc
+        can't depend on cached version to have evaluate ifdefs identically...
+        if we can define a deterministic hash for the shader based on
+        all the inputs, maybe we can save some time here.
+        if (mShaderObjects.count(filename) > 0)
+        {
+            return mShaderObjects[filename];
+        }
+
+        */
+
+ 		LL_DEBUGS("ShaderLoading") << "Looking in " << open_file_name << LL_ENDL;
+		file = LLFile::fopen(open_file_name, "r");		/* Flawfinder: ignore */
 		if (file)
 		{
-			LL_DEBUGS("ShaderLoading") << "Loading file: shaders/class" << gpu_class << "/" << filename << " (Want class " << gpu_class << ")" << LL_ENDL;
+			LL_DEBUGS("ShaderLoading") << "Loading file: " << open_file_name << " (Want class " << gpu_class << ")" << LL_ENDL;            
 			break; // done
 		}
 	}
 	
 	if (file == NULL)
 	{
-		LL_WARNS("ShaderLoading") << "GLSL Shader file not found: " << filename << LL_ENDL;
+		LL_SHADER_LOADING_WARNS() << "GLSL Shader file not found: " << open_file_name << LL_ENDL;
 		return 0;
 	}
 
@@ -612,7 +711,31 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 	}
 	else
 	{  
-		if (major_version < 4)
+        if (major_version >= 4)
+        {
+            //set version to 400
+			shader_code_text[shader_code_count++] = strdup("#version 400\n");
+        }
+        else if (major_version == 3)
+        {
+            if (minor_version < 10)
+		    {
+			    shader_code_text[shader_code_count++] = strdup("#version 300\n");
+		    }
+		    else if (minor_version <= 19)
+		    {
+			    shader_code_text[shader_code_count++] = strdup("#version 310\n");
+		    }
+		    else if (minor_version <= 29)
+		    {
+			    shader_code_text[shader_code_count++] = strdup("#version 320\n");
+		    }
+            else
+            {
+                shader_code_text[shader_code_count++] = strdup("#version 330\n");
+            }
+        }
+		else
 		{
 			//set version to 1.30
 			shader_code_text[shader_code_count++] = strdup("#version 130\n");
@@ -620,10 +743,6 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 			extra_code_text[extra_code_count++] = strdup("precision mediump int;\n");
 			extra_code_text[extra_code_count++] = strdup("precision highp float;\n");
 		}
-		else
-		{ //set version to 400
-			shader_code_text[shader_code_count++] = strdup("#version 400\n");
-		}
 
 		extra_code_text[extra_code_count++] = strdup("#define DEFINE_GL_FRAGCOLOR 1\n");
 		extra_code_text[extra_code_count++] = strdup("#define FXAA_GLSL_130 1\n");
@@ -646,7 +765,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 		extra_code_text[extra_code_count++] = strdup("#define texture2D texture\n");
 		extra_code_text[extra_code_count++] = strdup("#define textureCube texture\n");
 		extra_code_text[extra_code_count++] = strdup("#define texture2DLod textureLod\n");
-		extra_code_text[extra_code_count++] = strdup("#define	shadow2D(a,b) vec2(texture(a,b))\n");
+		extra_code_text[extra_code_count++] = strdup("#define shadow2D(a,b) vec2(texture(a,b))\n");
 		
 		if (major_version > 1 || minor_version >= 40)
 		{ //GLSL 1.40 replaces texture2DRect et al with texture
@@ -704,7 +823,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 		}
 		*/
 
-		extra_code_text[extra_code_count++] = strdup("#define HAS_DIFFUSE_LOOKUP 1\n");
+		extra_code_text[extra_code_count++] = strdup("#define HAS_DIFFUSE_LOOKUP\n");
 
 		//uniform declartion
 		for (S32 i = 0; i < texture_index_channels; ++i)
@@ -763,11 +882,6 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 			LL_ERRS() << "Indexed texture rendering requires GLSL 1.30 or later." << LL_ENDL;
 		}
 	}
-	else
-	{
-		extra_code_text[extra_code_count++] = strdup("#define HAS_DIFFUSE_LOOKUP 0\n");
-	}
-
     
 	//copy file into memory
 	enum {
@@ -897,38 +1011,8 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 			{
 				//an error occured, print log
 				LL_WARNS("ShaderLoading") << "GLSL Compilation Error:" << LL_ENDL;
-				dumpObjectLog(ret, TRUE, filename);
-#if LL_WINDOWS
-				std::stringstream ostr;
-				//dump shader source for debugging
-				for (GLuint i = 0; i < shader_code_count; i++)
-				{
-					ostr << i << ": " << shader_code_text[i];
-
-					if (i % 128 == 0)
-					{ //dump every 128 lines
-
-						LL_WARNS("ShaderLoading") << "\n" << ostr.str() << LL_ENDL;
-						ostr = std::stringstream();
-					}
-
-				}
-
-				LL_WARNS("ShaderLoading") << "\n" << ostr.str() << LL_ENDL;
-#else
-				std::string str;
-				
-				for (GLuint i = 0; i < shader_code_count; i++) {
-					str.append(shader_code_text[i]);
-					
-					if (i % 128 == 0)
-					{
-						LL_WARNS("ShaderLoading") << str << LL_ENDL;
-						str = "";
-					}
-				}
-#endif
-
+				dumpObjectLog(ret, TRUE, open_file_name);
+                dumpShaderSource(shader_code_count, shader_code_text);
 				ret = 0;
 			}
 		}
@@ -949,7 +1033,12 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 	if (ret)
 	{
 		// Add shader file to map
-		mShaderObjects[filename] = ret;
+        if (type == GL_VERTEX_SHADER_ARB) {
+            mVertexShaderObjects[filename] = ret;
+        }
+        else if (type == GL_FRAGMENT_SHADER_ARB) {
+            mFragmentShaderObjects[filename] = ret;
+        }
 		shader_level = try_gpu_class;
 	}
 	else
@@ -957,7 +1046,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 		if (shader_level > 1)
 		{
 			shader_level--;
-			return loadShaderFile(filename,shader_level,type, defines, texture_index_channels);
+			return loadShaderFile(filename, shader_level, type, defines, texture_index_channels);
 		}
 		LL_WARNS("ShaderLoading") << "Failed to load " << filename << LL_ENDL;	
 	}
@@ -973,7 +1062,7 @@ BOOL LLShaderMgr::linkProgramObject(GLhandleARB obj, BOOL suppress_errors)
 	if (!suppress_errors && success == GL_FALSE) 
 	{
 		//an error occured, print log
-		LL_WARNS("ShaderLoading") << "GLSL Linker Error:" << LL_ENDL;
+		LL_SHADER_LOADING_WARNS() << "GLSL Linker Error:" << LL_ENDL;
 	}
 
 #if LL_DARWIN
@@ -1006,7 +1095,7 @@ BOOL LLShaderMgr::linkProgramObject(GLhandleARB obj, BOOL suppress_errors)
 		CGLGetParameter(ctx, kCGLCPGPUFragmentProcessing, &fragmentGPUProcessing);
 		if (!fragmentGPUProcessing || !vertexGPUProcessing)
 		{
-			LL_WARNS("ShaderLoading") << "GLSL Linker: Running in Software:" << LL_ENDL;
+			LL_SHADER_LOADING_WARNS() << "GLSL Linker: Running in Software:" << LL_ENDL;
 			success = GL_FALSE;
 			suppress_errors = FALSE;		
 		}
@@ -1017,7 +1106,7 @@ BOOL LLShaderMgr::linkProgramObject(GLhandleARB obj, BOOL suppress_errors)
 	LLStringUtil::toLower(log);
 	if (log.find("software") != std::string::npos)
 	{
-		LL_WARNS("ShaderLoading") << "GLSL Linker: Running in Software:" << LL_ENDL;
+		LL_SHADER_LOADING_WARNS() << "GLSL Linker: Running in Software:" << LL_ENDL;
 		success = GL_FALSE;
 		suppress_errors = FALSE;
 	}
@@ -1033,7 +1122,7 @@ BOOL LLShaderMgr::validateProgramObject(GLhandleARB obj)
 	glGetObjectParameterivARB(obj, GL_OBJECT_VALIDATE_STATUS_ARB, &success);
 	if (success == GL_FALSE)
 	{
-		LL_WARNS("ShaderLoading") << "GLSL program not valid: " << LL_ENDL;
+		LL_SHADER_LOADING_WARNS() << "GLSL program not valid: " << LL_ENDL;
 		dumpObjectLog(obj);
 	}
 	else
@@ -1067,6 +1156,7 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("projection_matrix");
 	mReservedUniforms.push_back("inv_proj");
 	mReservedUniforms.push_back("modelview_projection_matrix");
+    mReservedUniforms.push_back("inv_modelview");
 	mReservedUniforms.push_back("normal_matrix");
 	mReservedUniforms.push_back("texture_matrix0");
 	mReservedUniforms.push_back("texture_matrix1");
@@ -1109,14 +1199,17 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("color");
 		
 	mReservedUniforms.push_back("diffuseMap");
+    mReservedUniforms.push_back("altDiffuseMap");
 	mReservedUniforms.push_back("specularMap");
 	mReservedUniforms.push_back("bumpMap");
+    mReservedUniforms.push_back("bumpMap2");
 	mReservedUniforms.push_back("environmentMap");
-	mReservedUniforms.push_back("cloude_noise_texture");
+	mReservedUniforms.push_back("cloud_noise_texture");
+    mReservedUniforms.push_back("cloud_noise_texture_next");
 	mReservedUniforms.push_back("fullbright");
 	mReservedUniforms.push_back("lightnorm");
-	mReservedUniforms.push_back("sunlight_color_copy");
-	mReservedUniforms.push_back("ambient");
+	mReservedUniforms.push_back("sunlight_color");
+	mReservedUniforms.push_back("ambient_color");
 	mReservedUniforms.push_back("blue_horizon");
 	mReservedUniforms.push_back("blue_density");
 	mReservedUniforms.push_back("haze_horizon");
@@ -1175,6 +1268,7 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("spot_shadow_bias");
 	mReservedUniforms.push_back("spot_shadow_offset");
 	mReservedUniforms.push_back("sun_dir");
+    mReservedUniforms.push_back("moon_dir");
 	mReservedUniforms.push_back("shadow_res");
 	mReservedUniforms.push_back("proj_shadow_res");
 	mReservedUniforms.push_back("depth_cutoff");
@@ -1217,8 +1311,6 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("bloomMap");
 	mReservedUniforms.push_back("projectionMap");
 	mReservedUniforms.push_back("norm_mat");
-
-	mReservedUniforms.push_back("global_gamma");
 	mReservedUniforms.push_back("texture_gamma");
 	
 	mReservedUniforms.push_back("specular_color");
@@ -1232,8 +1324,8 @@ void LLShaderMgr::initAttribsAndUniforms()
 	mReservedUniforms.push_back("refTex");
 	mReservedUniforms.push_back("eyeVec");
 	mReservedUniforms.push_back("time");
-	mReservedUniforms.push_back("d1");
-	mReservedUniforms.push_back("d2");
+	mReservedUniforms.push_back("waveDir1");
+	mReservedUniforms.push_back("waveDir2");
 	mReservedUniforms.push_back("lightDir");
 	mReservedUniforms.push_back("specular");
 	mReservedUniforms.push_back("lightExp");
@@ -1265,6 +1357,34 @@ void LLShaderMgr::initAttribsAndUniforms()
 
 	mReservedUniforms.push_back("origin");
 	mReservedUniforms.push_back("display_gamma");
+
+    mReservedUniforms.push_back("inscatter");
+    mReservedUniforms.push_back("sun_size");
+    mReservedUniforms.push_back("fog_color");
+
+    mReservedUniforms.push_back("transmittance_texture");
+    mReservedUniforms.push_back("scattering_texture");
+    mReservedUniforms.push_back("single_mie_scattering_texture");
+    mReservedUniforms.push_back("irradiance_texture");
+    mReservedUniforms.push_back("blend_factor");
+    mReservedUniforms.push_back("no_atmo");
+    mReservedUniforms.push_back("moisture_level");
+    mReservedUniforms.push_back("droplet_radius");
+    mReservedUniforms.push_back("ice_level");
+    mReservedUniforms.push_back("rainbow_map");
+    mReservedUniforms.push_back("halo_map");
+    mReservedUniforms.push_back("moon_brightness");
+    mReservedUniforms.push_back("cloud_variance");
+
+    mReservedUniforms.push_back("sh_input_r");
+    mReservedUniforms.push_back("sh_input_g");
+    mReservedUniforms.push_back("sh_input_b");
+
+    mReservedUniforms.push_back("sun_moon_glow_factor");
+    mReservedUniforms.push_back("water_edge");
+    mReservedUniforms.push_back("sun_up_factor");
+    mReservedUniforms.push_back("moonlight_color");
+
 	llassert(mReservedUniforms.size() == END_RESERVED_UNIFORMS);
 
 	std::set<std::string> dupe_check;
diff --git a/indra/llrender/llshadermgr.h b/indra/llrender/llshadermgr.h
index 394b38f832..127b5ce5b6 100644
--- a/indra/llrender/llshadermgr.h
+++ b/indra/llrender/llshadermgr.h
@@ -42,6 +42,7 @@ public:
 		PROJECTION_MATRIX,
 		INVERSE_PROJECTION_MATRIX,
 		MODELVIEW_PROJECTION_MATRIX,
+        INVERSE_MODELVIEW_MATRIX,
 		NORMAL_MATRIX,
 		TEXTURE_MATRIX0,
 		TEXTURE_MATRIX1,
@@ -73,10 +74,13 @@ public:
 		PROJECTOR_AMBIENT_LOD,
 		DIFFUSE_COLOR,
 		DIFFUSE_MAP,
+        ALTERNATE_DIFFUSE_MAP,
 		SPECULAR_MAP,
 		BUMP_MAP,
+        BUMP_MAP2,
 		ENVIRONMENT_MAP,
 		CLOUD_NOISE_MAP,
+        CLOUD_NOISE_MAP_NEXT,
 		FULLBRIGHT,
 		LIGHTNORM,
 		SUNLIGHT_COLOR,
@@ -131,6 +135,7 @@ public:
 		DEFERRED_SPOT_SHADOW_BIAS,
 		DEFERRED_SPOT_SHADOW_OFFSET,
 		DEFERRED_SUN_DIR,
+        DEFERRED_MOON_DIR,
 		DEFERRED_SHADOW_RES,
 		DEFERRED_PROJ_SHADOW_RES,
 		DEFERRED_DEPTH_CUTOFF,
@@ -168,10 +173,7 @@ public:
 		DEFERRED_BLOOM,
 		DEFERRED_PROJECTION,
 		DEFERRED_NORM_MATRIX,
-
-		GLOBAL_GAMMA,
-		TEXTURE_GAMMA,
-		
+		TEXTURE_GAMMA,		
 		SPECULAR_COLOR,
 		ENVIRONMENT_INTENSITY,
 		
@@ -215,7 +217,38 @@ public:
 		TERRAIN_ALPHARAMP,
 		
 		SHINY_ORIGIN,
-DISPLAY_GAMMA,
+        DISPLAY_GAMMA,
+
+        INSCATTER_RT,
+        SUN_SIZE,
+        FOG_COLOR,
+
+        // precomputed textures
+        TRANSMITTANCE_TEX,
+        SCATTER_TEX,
+        SINGLE_MIE_SCATTER_TEX,
+        ILLUMINANCE_TEX,
+        BLEND_FACTOR,
+
+        NO_ATMO,
+        MOISTURE_LEVEL,
+        DROPLET_RADIUS,
+        ICE_LEVEL,
+        RAINBOW_MAP,
+        HALO_MAP,
+
+        MOON_BRIGHTNESS,
+
+        CLOUD_VARIANCE,
+
+        SH_INPUT_L1R,
+        SH_INPUT_L1G,
+        SH_INPUT_L1B,
+
+        SUN_MOON_GLOW_FACTOR,
+        WATER_EDGE_FACTOR,
+        SUN_UP_FACTOR,
+        MOONLIGHT_COLOR,
 		END_RESERVED_UNIFORMS
 	} eGLSLReservedUniforms;
 
@@ -226,6 +259,7 @@ DISPLAY_GAMMA,
 
 	BOOL attachShaderFeatures(LLGLSLShader * shader);
 	void dumpObjectLog(GLhandleARB ret, BOOL warns = TRUE, const std::string& filename = "");
+    void dumpShaderSource(U32 shader_code_count, GLcharARB** shader_code_text);
 	BOOL	linkProgramObject(GLhandleARB obj, BOOL suppress_errors = FALSE);
 	BOOL	validateProgramObject(GLhandleARB obj);
 	GLhandleARB loadShaderFile(const std::string& filename, S32 & shader_level, GLenum type, boost::unordered_map<std::string, std::string>* defines = NULL, S32 texture_index_channels = -1);
@@ -238,7 +272,8 @@ DISPLAY_GAMMA,
 
 public:
 	// Map of shader names to compiled
-	std::map<std::string, GLhandleARB> mShaderObjects;
+    std::map<std::string, GLhandleARB> mVertexShaderObjects;
+    std::map<std::string, GLhandleARB> mFragmentShaderObjects;
 
 	//global (reserved slot) shader parameters
 	std::vector<std::string> mReservedAttribs;
diff --git a/indra/llrender/lltexture.cpp b/indra/llrender/lltexture.cpp
index 90fbcec2be..6eef36216c 100644
--- a/indra/llrender/lltexture.cpp
+++ b/indra/llrender/lltexture.cpp
@@ -29,3 +29,15 @@
 LLTexture::~LLTexture()
 {
 }
+
+S8   LLTexture::getType() const { llassert(false); return 0; }
+void LLTexture::setKnownDrawSize(S32 width, S32 height) { llassert(false); }
+bool LLTexture::bindDefaultImage(const S32 stage) { llassert(false); return false; }
+bool LLTexture::bindDebugImage(const S32 stage) { llassert(false); return false; }
+void LLTexture::forceImmediateUpdate() { llassert(false); }
+void LLTexture::setActive() { llassert(false);  }
+S32	 LLTexture::getWidth(S32 discard_level) const { llassert(false); return 0; }
+S32	 LLTexture::getHeight(S32 discard_level) const { llassert(false); return 0; }
+bool LLTexture::isActiveFetching() { llassert(false); return false; }
+LLImageGL* LLTexture::getGLTexture() const { llassert(false); return nullptr; }
+void LLTexture::updateBindStatsForTester() { }
diff --git a/indra/llrender/lltexture.h b/indra/llrender/lltexture.h
index 9fca8b8cd3..41481fb8a7 100644
--- a/indra/llrender/lltexture.h
+++ b/indra/llrender/lltexture.h
@@ -58,21 +58,21 @@ public:
 	//
 	//interfaces to access LLGLTexture
 	//
-	virtual S8         getType() const = 0 ;
-	virtual void       setKnownDrawSize(S32 width, S32 height) = 0 ;
-	virtual bool       bindDefaultImage(const S32 stage = 0) = 0 ;
-	virtual bool       bindDebugImage(const S32 stage = 0) = 0;
-	virtual void       forceImmediateUpdate() = 0 ;
-	virtual void       setActive() = 0 ;
-	virtual S32	       getWidth(S32 discard_level = -1) const = 0 ;
-	virtual S32	       getHeight(S32 discard_level = -1) const = 0 ;
-	virtual bool       isActiveFetching() = 0;
+	virtual S8         getType() const;
+	virtual void       setKnownDrawSize(S32 width, S32 height);
+	virtual bool       bindDefaultImage(const S32 stage = 0);
+	virtual bool       bindDebugImage(const S32 stage = 0);
+	virtual void       forceImmediateUpdate();
+	virtual void       setActive();
+	virtual S32	       getWidth(S32 discard_level = -1) const;
+	virtual S32	       getHeight(S32 discard_level = -1) const;
+	virtual bool       isActiveFetching();
 
 private:
 	//note: do not make this function public.
-	virtual LLImageGL* getGLTexture() const = 0 ;
+	virtual LLImageGL* getGLTexture() const;
 
-	virtual void updateBindStatsForTester() = 0 ;
+	virtual void updateBindStatsForTester();
 };
 #endif
 
diff --git a/indra/llrender/lluiimage.cpp b/indra/llrender/lluiimage.cpp
index c8337feabb..424672fe8e 100644
--- a/indra/llrender/lluiimage.cpp
+++ b/indra/llrender/lluiimage.cpp
@@ -31,7 +31,6 @@
 
 // Project includes
 #include "lluiimage.h"
-#include "llrender2dutils.h"
 
 LLUIImage::LLUIImage(const std::string& name, LLPointer<LLTexture> image)
 :	mName(name),
@@ -39,67 +38,29 @@ LLUIImage::LLUIImage(const std::string& name, LLPointer<LLTexture> image)
 	mScaleRegion(0.f, 1.f, 1.f, 0.f),
 	mClipRegion(0.f, 1.f, 1.f, 0.f),
 	mImageLoaded(NULL),
-	mScaleStyle(SCALE_INNER)
-{}
+	mScaleStyle(SCALE_INNER),
+    mCachedW(-1),
+    mCachedH(-1)
+{
+    getTextureWidth();
+    getTextureHeight();
+}
 
 LLUIImage::~LLUIImage()
 {
 	delete mImageLoaded;
 }
 
-void LLUIImage::setClipRegion(const LLRectf& region) 
+S32 LLUIImage::getWidth() const
 { 
-	mClipRegion = region; 
+	// return clipped dimensions of actual image area
+	return ll_round((F32)mImage->getWidth(0) * mClipRegion.getWidth()); 
 }
 
-void LLUIImage::setScaleRegion(const LLRectf& region) 
+S32 LLUIImage::getHeight() const
 { 
-	mScaleRegion = region; 
-}
-
-void LLUIImage::setScaleStyle(LLUIImage::EScaleStyle style)
-{
-	mScaleStyle = style;
-}
-
-//TODO: move drawing implementation inside class
-void LLUIImage::draw(S32 x, S32 y, const LLColor4& color) const
-{
-	draw(x, y, getWidth(), getHeight(), color);
-}
-
-void LLUIImage::draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
-{
-	gl_draw_scaled_image_with_border(
-		x, y, 
-		width, height, 
-		mImage, 
-		color,
-		FALSE,
-		mClipRegion,
-		mScaleRegion,
-		mScaleStyle == SCALE_INNER);
-}
-
-void LLUIImage::drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
-{
-	gl_draw_scaled_image_with_border(
-		x, y, 
-		width, height, 
-		mImage, 
-		color, 
-		TRUE,
-		mClipRegion,
-		mScaleRegion,
-		mScaleStyle == SCALE_INNER);
-}
-
-void LLUIImage::drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const
-{
-	LLRect border_rect;
-	border_rect.setOriginAndSize(x, y, width, height);
-	border_rect.stretch(border_width, border_width);
-	drawSolid(border_rect, color);
+	// return clipped dimensions of actual image area
+	return ll_round((F32)mImage->getHeight(0) * mClipRegion.getHeight()); 
 }
 
 void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, const LLVector3& y_axis, 
@@ -145,28 +106,7 @@ void LLUIImage::draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, c
 	} LLRender2D::getInstance()->popMatrix();
 }
 
-
-S32 LLUIImage::getWidth() const
-{ 
-	// return clipped dimensions of actual image area
-	return ll_round((F32)mImage->getWidth(0) * mClipRegion.getWidth()); 
-}
-
-S32 LLUIImage::getHeight() const
-{ 
-	// return clipped dimensions of actual image area
-	return ll_round((F32)mImage->getHeight(0) * mClipRegion.getHeight()); 
-}
-
-S32 LLUIImage::getTextureWidth() const
-{
-	return mImage->getWidth(0);
-}
-
-S32 LLUIImage::getTextureHeight() const
-{
-	return mImage->getHeight(0);
-}
+//#include "lluiimage.inl"
 
 boost::signals2::connection LLUIImage::addLoadedCallback( const image_loaded_signal_t::slot_type& cb ) 
 {
@@ -186,7 +126,6 @@ void LLUIImage::onImageLoaded()
 	}
 }
 
-
 namespace LLInitParam
 {
 	void ParamValue<LLUIImage*>::updateValueFromBlock()
diff --git a/indra/llrender/lluiimage.h b/indra/llrender/lluiimage.h
index 6f47385eb0..e462e19004 100644
--- a/indra/llrender/lluiimage.h
+++ b/indra/llrender/lluiimage.h
@@ -36,6 +36,7 @@
 #include <boost/signals2.hpp>
 #include "llinitparam.h"
 #include "lltexture.h"
+#include "llrender2dutils.h"
 
 extern const LLColor4 UI_VERTEX_COLOR;
 
@@ -53,35 +54,46 @@ public:
 	LLUIImage(const std::string& name, LLPointer<LLTexture> image);
 	virtual ~LLUIImage();
 
-	void setClipRegion(const LLRectf& region);
-	void setScaleRegion(const LLRectf& region);
-	void setScaleStyle(EScaleStyle style);
+	LL_FORCE_INLINE void setClipRegion(const LLRectf& region)
+    { 
+	    mClipRegion = region; 
+    }
 
-	LLPointer<LLTexture> getImage() { return mImage; }
-	const LLPointer<LLTexture>& getImage() const { return mImage; }
+	LL_FORCE_INLINE void setScaleRegion(const LLRectf& region)
+    { 
+	    mScaleRegion = region; 
+    }
 
-	void draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color = UI_VERTEX_COLOR) const;
-	void draw(S32 x, S32 y, const LLColor4& color = UI_VERTEX_COLOR) const;
-	void draw(const LLRect& rect, const LLColor4& color = UI_VERTEX_COLOR) const { draw(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
+	LL_FORCE_INLINE void setScaleStyle(EScaleStyle style)
+    {
+	    mScaleStyle = style;
+    }
+
+	LL_FORCE_INLINE LLPointer<LLTexture> getImage() { return mImage; }
+	LL_FORCE_INLINE const LLPointer<LLTexture>& getImage() const { return mImage; }
+
+	LL_FORCE_INLINE void draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color = UI_VERTEX_COLOR) const;
+	LL_FORCE_INLINE void draw(S32 x, S32 y, const LLColor4& color = UI_VERTEX_COLOR) const;
+	LL_FORCE_INLINE void draw(const LLRect& rect, const LLColor4& color = UI_VERTEX_COLOR) const { draw(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
 	
-	void drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const;
-	void drawSolid(const LLRect& rect, const LLColor4& color) const { drawSolid(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
-	void drawSolid(S32 x, S32 y, const LLColor4& color) const { drawSolid(x, y, getWidth(), getHeight(), color); }
+	LL_FORCE_INLINE void drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const;
+	LL_FORCE_INLINE void drawSolid(const LLRect& rect, const LLColor4& color) const { drawSolid(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color); }
+	LL_FORCE_INLINE void drawSolid(S32 x, S32 y, const LLColor4& color) const { drawSolid(x, y, getWidth(), getHeight(), color); }
 
-	void drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const;
-	void drawBorder(const LLRect& rect, const LLColor4& color, S32 border_width) const { drawBorder(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color, border_width); }
-	void drawBorder(S32 x, S32 y, const LLColor4& color, S32 border_width) const { drawBorder(x, y, getWidth(), getHeight(), color, border_width); }
+	LL_FORCE_INLINE void drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const;
+	LL_FORCE_INLINE void drawBorder(const LLRect& rect, const LLColor4& color, S32 border_width) const { drawBorder(rect.mLeft, rect.mBottom, rect.getWidth(), rect.getHeight(), color, border_width); }
+	LL_FORCE_INLINE void drawBorder(S32 x, S32 y, const LLColor4& color, S32 border_width) const { drawBorder(x, y, getWidth(), getHeight(), color, border_width); }
 
 	void draw3D(const LLVector3& origin_agent, const LLVector3& x_axis, const LLVector3& y_axis, const LLRect& rect, const LLColor4& color);
 
-	const std::string& getName() const { return mName; }
+	LL_FORCE_INLINE const std::string& getName() const { return mName; }
 
 	virtual S32 getWidth() const;
 	virtual S32 getHeight() const;
 
 	// returns dimensions of underlying textures, which might not be equal to ui image portion
-	S32 getTextureWidth() const;
-	S32 getTextureHeight() const;
+	LL_FORCE_INLINE S32 getTextureWidth() const;
+	LL_FORCE_INLINE S32 getTextureHeight() const;
 
 	boost::signals2::connection addLoadedCallback( const image_loaded_signal_t::slot_type& cb );
 
@@ -95,8 +107,12 @@ protected:
 	LLRectf					mClipRegion;
 	LLPointer<LLTexture>	mImage;
 	EScaleStyle				mScaleStyle;
+    mutable S32             mCachedW;
+    mutable S32             mCachedH;
 };
 
+#include "lluiimage.inl"
+
 namespace LLInitParam
 {
 	template<>
diff --git a/indra/llrender/lluiimage.inl b/indra/llrender/lluiimage.inl
new file mode 100644
index 0000000000..f5227556f0
--- /dev/null
+++ b/indra/llrender/lluiimage.inl
@@ -0,0 +1,77 @@
+/** 
+ * @file lluiimage.inl
+ * @brief UI inline func implementation
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+void LLUIImage::draw(S32 x, S32 y, const LLColor4& color) const
+{
+	draw(x, y, getWidth(), getHeight(), color);
+}
+
+void LLUIImage::draw(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
+{
+	gl_draw_scaled_image_with_border(
+		x, y, 
+		width, height, 
+		mImage, 
+		color,
+		FALSE,
+		mClipRegion,
+		mScaleRegion,
+		mScaleStyle == SCALE_INNER);
+}
+
+void LLUIImage::drawSolid(S32 x, S32 y, S32 width, S32 height, const LLColor4& color) const
+{
+	gl_draw_scaled_image_with_border(
+		x, y, 
+		width, height, 
+		mImage, 
+		color, 
+		TRUE,
+		mClipRegion,
+		mScaleRegion,
+		mScaleStyle == SCALE_INNER);
+}
+
+void LLUIImage::drawBorder(S32 x, S32 y, S32 width, S32 height, const LLColor4& color, S32 border_width) const
+{
+	LLRect border_rect;
+	border_rect.setOriginAndSize(x, y, width, height);
+	border_rect.stretch(border_width, border_width);
+	drawSolid(border_rect, color);
+}
+
+// returns dimensions of underlying textures, which might not be equal to ui image portion
+S32 LLUIImage::getTextureWidth() const
+{
+    mCachedW = (mCachedW == -1) ? getWidth() : mCachedW;
+    return mCachedW;
+}
+
+S32 LLUIImage::getTextureHeight() const
+{
+    mCachedH = (mCachedH == -1) ? getHeight() : mCachedH;
+    return mCachedH;
+}
diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
index 1312f6afda..94a04d4ddb 100644
--- a/indra/llrender/llvertexbuffer.cpp
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -660,6 +660,9 @@ void LLVertexBuffer::drawElements(U32 mode, const LLVector4a* pos, const LLVecto
 
 void LLVertexBuffer::validateRange(U32 start, U32 end, U32 count, U32 indices_offset) const
 {
+    llassert(start < (U32)mNumVerts);
+    llassert(end < (U32)mNumVerts);
+
 	if (start >= (U32) mNumVerts ||
 	    end >= (U32) mNumVerts)
 	{
@@ -679,6 +682,9 @@ void LLVertexBuffer::validateRange(U32 start, U32 end, U32 count, U32 indices_of
 		U16* idx = ((U16*) getIndicesPointer())+indices_offset;
 		for (U32 i = 0; i < count; ++i)
 		{
+            llassert(idx[i] >= start);
+            llassert(idx[i] <= end);
+
 			if (idx[i] < start || idx[i] > end)
 			{
 				LL_ERRS() << "Index out of range: " << idx[i] << " not in [" << start << ", " << end << "]" << LL_ENDL;
@@ -697,6 +703,7 @@ void LLVertexBuffer::validateRange(U32 start, U32 end, U32 count, U32 indices_of
 			for (U32 i = start; i < end; i++)
 			{
 				S32 idx = (S32) (v[i][3]+0.25f);
+                llassert(idx >= 0);
 				if (idx < 0 || idx >= shader->mFeatures.mIndexedTextureChannels)
 				{
 					LL_ERRS() << "Bad texture index found in vertex data stream." << LL_ENDL;
@@ -942,15 +949,15 @@ S32 LLVertexBuffer::determineUsage(S32 usage)
 	{ //only stream_draw and dynamic_draw are supported when using VBOs, dynamic draw is the default
 		if (ret_usage != GL_DYNAMIC_COPY_ARB)
 		{
-		if (sDisableVBOMapping)
-		{ //always use stream draw if VBO mapping is disabled
-			ret_usage = GL_STREAM_DRAW_ARB;
-		}
-		else
-		{
-			ret_usage = GL_DYNAMIC_DRAW_ARB;
-		}
-	}
+		    if (sDisableVBOMapping)
+		    { //always use stream draw if VBO mapping is disabled
+			    ret_usage = GL_STREAM_DRAW_ARB;
+		    }
+		    else
+		    {
+			    ret_usage = GL_DYNAMIC_DRAW_ARB;
+		    }
+	    }
 	}
 	
 	return ret_usage;
@@ -1506,10 +1513,10 @@ bool LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 	llassert(newnverts >= 0);
 	llassert(newnindices >= 0);
 
-	bool sucsess = true;
+	bool success = true;
 
-	sucsess &= updateNumVerts(newnverts);		
-	sucsess &= updateNumIndices(newnindices);
+	success &= updateNumVerts(newnverts);		
+	success &= updateNumIndices(newnindices);
 	
 	if (useVBOs())
 	{
@@ -1521,7 +1528,7 @@ bool LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
 		}
 	}
 
-	return sucsess;
+	return success;
 }
 
 bool LLVertexBuffer::useVBOs() const
@@ -2319,34 +2326,35 @@ void LLVertexBuffer::setBuffer(U32 data_mask)
 			{
 				
 				U32 unsatisfied_mask = (required_mask & ~data_mask);
-				U32 i = 0;
 
-				while (i < TYPE_MAX)
-				{
+                for (U32 i = 0; i < TYPE_MAX; i++)
+                {
                     U32 unsatisfied_flag = unsatisfied_mask & (1 << i);
-					switch (unsatisfied_flag)
-					{
-						case MAP_VERTEX: LL_INFOS() << "Missing vert pos" << LL_ENDL; break;
-						case MAP_NORMAL: LL_INFOS() << "Missing normals" << LL_ENDL; break;
-						case MAP_TEXCOORD0: LL_INFOS() << "Missing TC 0" << LL_ENDL; break;
-						case MAP_TEXCOORD1: LL_INFOS() << "Missing TC 1" << LL_ENDL; break;
-						case MAP_TEXCOORD2: LL_INFOS() << "Missing TC 2" << LL_ENDL; break;
-						case MAP_TEXCOORD3: LL_INFOS() << "Missing TC 3" << LL_ENDL; break;
-						case MAP_COLOR: LL_INFOS() << "Missing vert color" << LL_ENDL; break;
-						case MAP_EMISSIVE: LL_INFOS() << "Missing emissive" << LL_ENDL; break;
-						case MAP_TANGENT: LL_INFOS() << "Missing tangent" << LL_ENDL; break;
-						case MAP_WEIGHT: LL_INFOS() << "Missing weight" << LL_ENDL; break;
-						case MAP_WEIGHT4: LL_INFOS() << "Missing weightx4" << LL_ENDL; break;
-						case MAP_CLOTHWEIGHT: LL_INFOS() << "Missing clothweight" << LL_ENDL; break;
-						case MAP_TEXTURE_INDEX: LL_INFOS() << "Missing tex index" << LL_ENDL; break;
-						default: LL_INFOS() << "Missing who effin knows: " << unsatisfied_flag << LL_ENDL;
-					}					
-				}
-
-            if (unsatisfied_mask & (1 << TYPE_INDEX))
-            {
-               LL_INFOS() << "Missing indices" << LL_ENDL;
-            }
+                    switch (unsatisfied_flag)
+                    {
+                        case 0: break;
+                        case MAP_VERTEX: LL_INFOS() << "Missing vert pos" << LL_ENDL; break;
+                        case MAP_NORMAL: LL_INFOS() << "Missing normals" << LL_ENDL; break;
+                        case MAP_TEXCOORD0: LL_INFOS() << "Missing TC 0" << LL_ENDL; break;
+                        case MAP_TEXCOORD1: LL_INFOS() << "Missing TC 1" << LL_ENDL; break;
+                        case MAP_TEXCOORD2: LL_INFOS() << "Missing TC 2" << LL_ENDL; break;
+                        case MAP_TEXCOORD3: LL_INFOS() << "Missing TC 3" << LL_ENDL; break;
+                        case MAP_COLOR: LL_INFOS() << "Missing vert color" << LL_ENDL; break;
+                        case MAP_EMISSIVE: LL_INFOS() << "Missing emissive" << LL_ENDL; break;
+                        case MAP_TANGENT: LL_INFOS() << "Missing tangent" << LL_ENDL; break;
+                        case MAP_WEIGHT: LL_INFOS() << "Missing weight" << LL_ENDL; break;
+                        case MAP_WEIGHT4: LL_INFOS() << "Missing weightx4" << LL_ENDL; break;
+                        case MAP_CLOTHWEIGHT: LL_INFOS() << "Missing clothweight" << LL_ENDL; break;
+                        case MAP_TEXTURE_INDEX: LL_INFOS() << "Missing tex index" << LL_ENDL; break;
+                        default: LL_INFOS() << "Missing who effin knows: " << unsatisfied_flag << LL_ENDL;
+                    }
+                }
+
+                // TYPE_INDEX is beyond TYPE_MAX, so check for it individually
+                if (unsatisfied_mask & (1 << TYPE_INDEX))
+                {
+                   LL_INFOS() << "Missing indices" << LL_ENDL;
+                }
 
 				LL_ERRS() << "Shader consumption mismatches data provision." << LL_ENDL;
 			}
diff --git a/indra/llrender/llvertexbuffer.h b/indra/llrender/llvertexbuffer.h
index c89d7e3958..9867bd16d6 100644
--- a/indra/llrender/llvertexbuffer.h
+++ b/indra/llrender/llvertexbuffer.h
@@ -179,8 +179,8 @@ public:
 		TYPE_WEIGHT4,
 		TYPE_CLOTHWEIGHT,
 		TYPE_TEXTURE_INDEX,
-		TYPE_MAX,
-		TYPE_INDEX,		
+		TYPE_MAX,   // TYPE_MAX is the size/boundary marker for attributes that go in the vertex buffer
+		TYPE_INDEX,	// TYPE_INDEX is beyond _MAX because it lives in a separate (index) buffer	
 	};
 	enum {
 		MAP_VERTEX = (1<<TYPE_VERTEX),