De-duplicate sRGB conversion funcs from many shaders

and unify on using the version that works on OSX.

Add more logging to shader loading about fallbacks and loading succcess.

Add frag shaders for sharing sRGB and normal encode/decode via GL shader linkage.

25 files changed, 271 insertions, 489 deletions

diff --git a/indra/llrender/llglslshader.cpp b/indra/llrender/llglslshader.cpp
index b09ec53bc0..6bea2e7a76 100644
--- a/indra/llrender/llglslshader.cpp
+++ b/indra/llrender/llglslshader.cpp
@@ -84,6 +84,7 @@ LLShaderFeatures::LLShaderFeatures()
     , hasObjectSkinning(false)
     , hasAtmospherics(false)
     , hasGamma(false)
+    , hasSrgb(false)
     , mIndexedTextureChannels(0)
     , disableTextureIndex(false)
     , hasAlphaMask(false)
diff --git a/indra/llrender/llglslshader.h b/indra/llrender/llglslshader.h
index a7a9e27fcd..b6c54a0bf8 100644
--- a/indra/llrender/llglslshader.h
+++ b/indra/llrender/llglslshader.h
@@ -48,6 +48,7 @@ public:
 	bool hasObjectSkinning;
 	bool hasAtmospherics;
 	bool hasGamma;
+	bool hasSrgb;
 	S32 mIndexedTextureChannels;
 	bool disableTextureIndex;
 	bool hasAlphaMask;
diff --git a/indra/llrender/llshadermgr.cpp b/indra/llrender/llshadermgr.cpp
index 287f22783f..6c816d0dc4 100644
--- a/indra/llrender/llshadermgr.cpp
+++ b/indra/llrender/llshadermgr.cpp
@@ -41,6 +41,8 @@
 #define UNIFORM_ERRS LL_ERRS("Shader")
 #endif
 
+#pragma optimize("", off)
+
 // Lots of STL stuff in here, using namespace std to keep things more readable
 using std::vector;
 using std::pair;
@@ -202,7 +204,15 @@ BOOL LLShaderMgr::attachShaderFeatures(LLGLSLShader * shader)
 			return FALSE;
 		}
 	}
-	
+
+	if (features->hasSrgb)
+	{
+		if (!shader->attachObject("environment/srgbF.glsl"))
+		{
+			return FALSE;
+		}
+	}
+
 	if (features->hasAtmospherics)
 	{
 		if (!shader->attachObject("windlight/atmosphericsF.glsl"))
diff --git a/indra/llui/llui.h b/indra/llui/llui.h
index d7151dbee9..111f6472cd 100644
--- a/indra/llui/llui.h
+++ b/indra/llui/llui.h
@@ -33,7 +33,6 @@
 #include "llcontrol.h"
 #include "llcoord.h"
 #include "llcontrol.h"
-#include "llglslshader.h"
 #include "llinitparam.h"
 #include "llregistry.h"
 #include "llrender2dutils.h"
@@ -49,7 +48,6 @@
 // for initparam specialization
 #include "llfontgl.h"
 
-
 class LLUUID;
 class LLWindow;
 class LLView;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index b36016529c..090aa3d27f 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -102,42 +102,8 @@ uniform vec3 light_diffuse[8];
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec2 encode_normal(vec3 n)
 {
@@ -527,7 +493,7 @@ void main()
 	calcAtmospherics(pos.xyz, 1.0);
 
 	vec2 abnormal	= encode_normal(norm.xyz);
-		 norm.xyz   = decode_normal(abnormal.xy);
+	 norm.xyz   = decode_normal(abnormal.xy);
 
 	float da = dot(norm.xyz, sun_dir.xyz);
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index d554377220..134e9c3b4c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -45,42 +45,8 @@ VARYING vec2 vary_texcoord0;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec3 fullbrightAtmosTransportDeferred(vec3 light)
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
index 4818afc910..6ba16b169c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/impostorF.glsl
@@ -40,41 +40,7 @@ uniform sampler2D specularMap;
 
 VARYING vec2 vary_texcoord0;
 
-vec3 decode_normal (vec2 enc)
-{
-    vec2 fenc = enc*4-2;
-    float f = dot(fenc,fenc);
-    float g = sqrt(1-f/4);
-    vec3 n;
-    n.xy = fenc*g;
-    n.z = 1-f/2;
-    return n;
-}
-
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 linear_to_srgb(vec3 cl);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index 6fa625765a..e1b582c08c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -37,42 +37,8 @@ uniform float display_gamma;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 #if (DIFFUSE_ALPHA_MODE == DIFFUSE_ALPHA_MODE_BLEND)
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
index b35b3e62c5..eeb2fe39cc 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
@@ -72,12 +72,6 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
 vec3 decode_normal (vec2 enc)
 {
     vec2 fenc = enc*4-2;
@@ -88,43 +82,9 @@ vec3 decode_normal (vec2 enc)
     n.z = 1-f/2;
     return n;
 }
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
 
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
index aba4a01754..4f02365f45 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -56,12 +56,6 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 uniform vec4 viewport;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
 vec3 decode_normal (vec2 enc)
 {
     vec2 fenc = enc*4-2;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
index 6669947d1b..cbc19bbba3 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
@@ -40,25 +40,7 @@ VARYING vec2 vary_fragcoord;
 
 uniform float display_gamma;
 
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
+vec3 linear_to_srgb(vec3 cl);
 
 void main() 
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl
new file mode 100644
index 0000000000..12bc690553
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendF.glsl
@@ -0,0 +1,55 @@
+/** 
+ * @file shadowAlphaMaskF.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, 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
+ * $/LicenseInfo$
+ */
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform sampler2D diffuseMap;
+
+#if !DEPTH_CLAMP
+VARYING float pos_zd2;
+#endif
+
+VARYING float pos_w;
+
+VARYING float target_pos_x;
+VARYING vec4 vertex_color;
+VARYING vec2 vary_texcoord0;
+
+void main() 
+{
+	float alpha = diffuseLookup(vary_texcoord0.xy).a * vertex_color.a;
+
+	frag_color = vec4(alpha, alpha, alpha, 1);
+	
+#if !DEPTH_CLAMP
+	gl_FragDepth = max(pos_zd2/pos_w+0.5, 0.0);
+#endif
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
new file mode 100644
index 0000000000..11411a605c
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/deferred/shadowAlphaBlendV.glsl
@@ -0,0 +1,67 @@
+/** 
+ * @file shadowAlphaMaskV.glsl
+ *
+ * $LicenseInfo:firstyear=2011&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2011, 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
+ * $/LicenseInfo$
+ */
+
+uniform mat4 texture_matrix0;
+uniform mat4 modelview_projection_matrix;
+uniform float shadow_target_width;
+
+ATTRIBUTE vec3 position;
+ATTRIBUTE vec4 diffuse_color;
+ATTRIBUTE vec2 texcoord0;
+
+#if !DEPTH_CLAMP
+VARYING float pos_zd2;
+#endif
+
+VARYING float pos_w;
+
+VARYING float target_pos_x;
+VARYING vec4 vertex_color;
+VARYING vec2 vary_texcoord0;
+
+void passTextureIndex();
+
+void main()
+{
+	//transform vertex
+	vec4 pre_pos = vec4(position.xyz, 1.0);
+	vec4 pos = modelview_projection_matrix * pre_pos;
+	target_pos_x = 0.5 * (shadow_target_width - 1.0) * pos.x;
+
+	pos_w = pos.w;
+
+#if !DEPTH_CLAMP
+	pos_zd2 = pos.z * 0.5;
+	
+	gl_Position = vec4(pos.x, pos.y, pos.w*0.5, pos.w);
+#else
+	gl_Position = pos;
+#endif
+	
+	passTextureIndex();
+
+	vary_texcoord0 = (texture_matrix0 * vec4(texcoord0,0,1)).xy;
+	vertex_color = diffuse_color;
+}
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
index b294dba167..0703f75d60 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl
@@ -85,42 +85,8 @@ uniform vec2 screen_res;
 vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
-
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec3 decode_normal (vec2 enc)
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
index f1aec315cc..88e79a8c46 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
@@ -70,12 +70,6 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
 vec3 decode_normal (vec2 enc)
 {
     vec2 fenc = enc*4-2;
@@ -87,42 +81,8 @@ vec3 decode_normal (vec2 enc)
     return n;
 }
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec4 correctWithGamma(vec4 col)
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
index 930255729b..3a31173fab 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/sunLightSSAOF.glsl
@@ -51,12 +51,6 @@ VARYING vec2 vary_fragcoord;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
 vec3 decode_normal (vec2 enc)
 {
     vec2 fenc = enc*4-2;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
index b173f233a5..5e676b23f0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/underWaterF.glsl
@@ -58,42 +58,8 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec2 encode_normal(vec3 n)
 {
diff --git a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
index 37dcd3ad34..99c84c67e9 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/waterF.glsl
@@ -69,42 +69,7 @@ VARYING vec4 littleWave;
 VARYING vec4 view;
 VARYING vec4 vary_position;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
 
 vec2 encode_normal(vec3 n)
 {
diff --git a/indra/newview/app_settings/shaders/class1/environment/decodeNorm.glsl b/indra/newview/app_settings/shaders/class1/environment/decodeNorm.glsl
new file mode 100644
index 0000000000..0abb1e43db
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/environment/decodeNorm.glsl
@@ -0,0 +1,11 @@
+vec3 decode_normal (vec2 enc)
+{
+    vec2 fenc = enc*4-2;
+    float f = dot(fenc,fenc);
+    float g = sqrt(1-f/4);
+    vec3 n;
+    n.xy = fenc*g;
+    n.z = 1-f/2;
+    return n;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/environment/encodeNorm.glsl b/indra/newview/app_settings/shaders/class1/environment/encodeNorm.glsl
new file mode 100644
index 0000000000..ee21715c1d
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/environment/encodeNorm.glsl
@@ -0,0 +1,7 @@
+
+vec2 encode_normal(vec3 n)
+{
+	float f = sqrt(8 * n.z + 8);
+	return n.xy / f + 0.5;
+}
+
diff --git a/indra/newview/app_settings/shaders/class1/deferred/srgb_mac.glsl b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
index 6cc1e6e798..835662732a 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/srgb_mac.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
@@ -1,5 +1,5 @@
 /** 
- * @file srgb.glsl
+ * @file srgbF.glsl
  *
  * $LicenseInfo:firstyear=2007&license=viewerlgpl$
  * Second Life Viewer Source Code
@@ -27,14 +27,18 @@ vec3 srgb_to_linear(vec3 cs)
 {
 	vec3 low_range = cs / vec3(12.92);
 	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-
 	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
 
+#ifdef OLD_SELECT
 	vec3 result;
 	result.r = lte.r ? low_range.r : high_range.r;
 	result.g = lte.g ? low_range.g : high_range.g;
 	result.b = lte.b ? low_range.b : high_range.b;
     return result;
+#else
+	return mix(high_range, low_range, lte);
+#endif
+
 }
 
 vec3 linear_to_srgb(vec3 cl)
@@ -42,13 +46,17 @@ vec3 linear_to_srgb(vec3 cl)
 	cl = clamp(cl, vec3(0), vec3(1));
 	vec3 low_range  = cl * 12.92;
 	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-
 	bvec3 lt = lessThan(cl,vec3(0.0031308));
 
+#ifdef OLD_SELECT
 	vec3 result;
 	result.r = lt.r ? low_range.r : high_range.r;
 	result.g = lt.g ? low_range.g : high_range.g;
 	result.b = lt.b ? low_range.b : high_range.b;
-	return result;
+    return result;
+#else
+	return mix(high_range, low_range, lt);
+#endif
+
 }
 
diff --git a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
index b9bb522842..ac7329e3eb 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
@@ -71,42 +71,8 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec2 encode_normal(vec3 n)
 {
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index cf076d156a..9912f30731 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -80,42 +80,8 @@ vec3 vary_AtmosAttenuation;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec2 encode_normal(vec3 n)
 {
diff --git a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
index b2d9de6e73..440f4aa157 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
@@ -88,42 +88,8 @@ vec3 decode_normal (vec2 enc)
     return n;
 }
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	vec3 low_range = cs / vec3(12.92);
-	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lte.r ? low_range.r : high_range.r;
-	result.g = lte.g ? low_range.g : high_range.g;
-	result.b = lte.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lte);
-#endif
-
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	cl = clamp(cl, vec3(0), vec3(1));
-	vec3 low_range  = cl * 12.92;
-	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-	bvec3 lt = lessThan(cl,vec3(0.0031308));
-
-#ifdef OLD_SELECT
-	vec3 result;
-	result.r = lt.r ? low_range.r : high_range.r;
-	result.g = lt.g ? low_range.g : high_range.g;
-	result.b = lt.b ? low_range.b : high_range.b;
-    return result;
-#else
-	return mix(high_range, low_range, lt);
-#endif
-
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec4 correctWithGamma(vec4 col)
 {
diff --git a/indra/newview/llviewershadermgr.cpp b/indra/newview/llviewershadermgr.cpp
index 5f392233bf..649997a4c6 100644
--- a/indra/newview/llviewershadermgr.cpp
+++ b/indra/newview/llviewershadermgr.cpp
@@ -549,27 +549,67 @@ void LLViewerShaderMgr::setShaders()
 			if (loaded)
 			{
 				loaded = loadShadersWater();
+                if (loaded)
+                {
+                    LL_INFOS() << "Loaded water shaders." << LL_ENDL;
+                }
+                else
+                {
+                    LL_WARNS() << "Failed to load water shaders." << LL_ENDL;
+                }
 			}
 
 			if (loaded)
 			{
 				loaded = loadShadersWindLight();
+                if (loaded)
+                {
+                    LL_INFOS() << "Loaded windlight shaders." << LL_ENDL;
+                }
+                else
+                {
+                    LL_WARNS() << "Failed to load windlight shaders." << LL_ENDL;
+                }
 			}
 
 			if (loaded)
 			{
 				loaded = loadShadersEffects();
+                if (loaded)
+                {
+                    LL_INFOS() << "Loaded effects shaders." << LL_ENDL;
+                }
+                else
+                {
+                    LL_WARNS() << "Failed to load effects shaders." << LL_ENDL;
+                }
 			}
 
 			if (loaded)
 			{
 				loaded = loadShadersInterface();
+                if (loaded)
+                {
+                    LL_INFOS() << "Loaded interface shaders." << LL_ENDL;
+                }
+                else
+                {
+                    LL_WARNS() << "Failed to load interface shaders." << LL_ENDL;
+                }
 			}
 
 			if (loaded)
 
 		    {
 				loaded = loadTransformShaders();
+                if (loaded)
+                {
+                    LL_INFOS() << "Loaded transform shaders." << LL_ENDL;
+                }
+                else
+                {
+                    LL_WARNS() << "Failed to load transform shaders." << LL_ENDL;
+                }
 			}
 
 			if (loaded)
@@ -628,6 +668,7 @@ void LLViewerShaderMgr::setShaders()
 				if (gSavedSettings.getBOOL("WindLightUseAtmosShaders"))
 				{ //disable windlight and try again
 					gSavedSettings.setBOOL("WindLightUseAtmosShaders", FALSE);
+                    LL_WARNS() << "Falling back to no windlight shaders." << LL_ENDL;
 					reentrance = false;
 					setShaders();
 					return;
@@ -636,6 +677,7 @@ void LLViewerShaderMgr::setShaders()
 				if (gSavedSettings.getBOOL("VertexShaderEnable"))
 				{ //disable shaders outright and try again
 					gSavedSettings.setBOOL("VertexShaderEnable", FALSE);
+                    LL_WARNS() << "Falling back to no vertex shaders." << LL_ENDL;
 					reentrance = false;
 					setShaders();
 					return;
@@ -645,6 +687,7 @@ void LLViewerShaderMgr::setShaders()
 			if (loaded && !loadShadersDeferred())
 			{ //everything else succeeded but deferred failed, disable deferred and try again
 				gSavedSettings.setBOOL("RenderDeferred", FALSE);
+                LL_WARNS() << "Falling back to no deferred shaders." << LL_ENDL;
 				reentrance = false;
 				setShaders();
 				return;
@@ -905,6 +948,7 @@ BOOL LLViewerShaderMgr::loadBasicShaders()
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "windlight/atmosphericsF.glsl",			mVertexShaderLevel[SHADER_WINDLIGHT] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "windlight/transportF.glsl",				mVertexShaderLevel[SHADER_WINDLIGHT] ) );	
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "environment/waterFogF.glsl",				mVertexShaderLevel[SHADER_WATER] ) );
+    index_channels.push_back(-1);	 shaders.push_back( make_pair( "environment/srgbF.glsl",				    mVertexShaderLevel[SHADER_ENVIRONMENT] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightNonIndexedF.glsl",					mVertexShaderLevel[SHADER_LIGHTING] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightAlphaMaskNonIndexedF.glsl",					mVertexShaderLevel[SHADER_LIGHTING] ) );
 	index_channels.push_back(-1);	 shaders.push_back( make_pair( "lighting/lightFullbrightNonIndexedF.glsl",			mVertexShaderLevel[SHADER_LIGHTING] ) );
@@ -1260,6 +1304,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSkinnedAlphaProgram.mFeatures.hasLighting = false;
 		gDeferredSkinnedAlphaProgram.mFeatures.isAlphaLighting = true;
 		gDeferredSkinnedAlphaProgram.mFeatures.disableTextureIndex = true;
+		gDeferredSkinnedAlphaProgram.mFeatures.hasSrgb = true;
 		gDeferredSkinnedAlphaProgram.mShaderFiles.clear();
 		gDeferredSkinnedAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSkinnedAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1322,6 +1367,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 			bool has_skin = i & 0x10;
 			gDeferredMaterialProgram[i].addPermutation("HAS_SKIN",has_skin ? "1" : "0");
 
+			gDeferredMaterialProgram[i].mFeatures.hasSrgb = true;
+
 			if (has_skin)
 			{
 				gDeferredMaterialProgram[i].mFeatures.hasObjectSkinning = true;
@@ -1350,8 +1397,9 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 			gDeferredMaterialWaterProgram[i].addPermutation("HAS_SKIN",has_skin ? "1" : "0");
 			gDeferredMaterialWaterProgram[i].addPermutation("WATER_FOG","1");
 
-            gDeferredMaterialWaterProgram[i].mFeatures.hasWaterFog = true;
-
+			gDeferredMaterialWaterProgram[i].mFeatures.hasWaterFog = true;
+			gDeferredMaterialWaterProgram[i].mFeatures.hasSrgb = true;
+            
 			if (has_skin)
 			{
 				gDeferredMaterialWaterProgram[i].mFeatures.hasObjectSkinning = true;
@@ -1403,6 +1451,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredImpostorProgram.mName = "Deferred Impostor Shader";
+		gDeferredImpostorProgram.mFeatures.hasSrgb = true;
 		gDeferredImpostorProgram.mShaderFiles.clear();
 		gDeferredImpostorProgram.mShaderFiles.push_back(make_pair("deferred/impostorV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredImpostorProgram.mShaderFiles.push_back(make_pair("deferred/impostorF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1439,6 +1488,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredSpotLightProgram.mName = "Deferred SpotLight Shader";
 		gDeferredSpotLightProgram.mShaderFiles.clear();
+		gDeferredSpotLightProgram.mFeatures.hasSrgb = true;
 		gDeferredSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/pointLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/spotLightF.glsl", GL_FRAGMENT_SHADER_ARB));
 		gDeferredSpotLightProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
@@ -1449,6 +1499,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredMultiSpotLightProgram.mName = "Deferred MultiSpotLight Shader";
+		gDeferredMultiSpotLightProgram.mFeatures.hasSrgb = true;
 		gDeferredMultiSpotLightProgram.mShaderFiles.clear();
 		gDeferredMultiSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/multiPointLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredMultiSpotLightProgram.mShaderFiles.push_back(make_pair("deferred/multiSpotLightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1503,6 +1554,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaProgram.mFeatures.hasLighting = false;
 		gDeferredAlphaProgram.mFeatures.isAlphaLighting = true;
 		gDeferredAlphaProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
+        gDeferredAlphaProgram.mFeatures.hasSrgb = true;
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
 			gDeferredAlphaProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
@@ -1529,11 +1581,12 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 
 	if (success)
 	{
-		gDeferredAlphaImpostorProgram.mName = "Deferred Alpha Shader";
+		gDeferredAlphaImpostorProgram.mName = "Deferred Alpha Impostor Shader";
 
 		gDeferredAlphaImpostorProgram.mFeatures.calculatesLighting = false;
 		gDeferredAlphaImpostorProgram.mFeatures.hasLighting = false;
 		gDeferredAlphaImpostorProgram.mFeatures.isAlphaLighting = true;
+		gDeferredAlphaImpostorProgram.mFeatures.hasSrgb = true;
 		gDeferredAlphaImpostorProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
@@ -1568,7 +1621,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAlphaWaterProgram.mFeatures.hasLighting = false;
 		gDeferredAlphaWaterProgram.mFeatures.isAlphaLighting = true;
 		gDeferredAlphaWaterProgram.mFeatures.disableTextureIndex = true; //hack to disable auto-setup of texture channels
-        gDeferredAlphaWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredAlphaWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredAlphaWaterProgram.mFeatures.hasSrgb = true;
 		if (mVertexShaderLevel[SHADER_DEFERRED] < 1)
 		{
 			gDeferredAlphaWaterProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
@@ -1601,6 +1655,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAvatarEyesProgram.mFeatures.hasGamma = true;
 		gDeferredAvatarEyesProgram.mFeatures.hasTransport = true;
 		gDeferredAvatarEyesProgram.mFeatures.disableTextureIndex = true;
+        gDeferredAvatarEyesProgram.mFeatures.hasSrgb = true;
 		gDeferredAvatarEyesProgram.mShaderFiles.clear();
 		gDeferredAvatarEyesProgram.mShaderFiles.push_back(make_pair("deferred/avatarEyesV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAvatarEyesProgram.mShaderFiles.push_back(make_pair("deferred/diffuseF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1614,6 +1669,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightProgram.mFeatures.hasTransport = true;
+		gDeferredFullbrightProgram.mFeatures.hasSrgb = true;
 		gDeferredFullbrightProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightProgram.mShaderFiles.clear();
 		gDeferredFullbrightProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1628,6 +1684,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasTransport = true;
+		gDeferredFullbrightAlphaMaskProgram.mFeatures.hasSrgb = true;
 		gDeferredFullbrightAlphaMaskProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightAlphaMaskProgram.mShaderFiles.clear();
 		gDeferredFullbrightAlphaMaskProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1643,7 +1700,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightWaterProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightWaterProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightWaterProgram.mFeatures.hasTransport = true;
-        gDeferredFullbrightWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredFullbrightWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredFullbrightWaterProgram.mFeatures.hasSrgb = true;
 		gDeferredFullbrightWaterProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightWaterProgram.mShaderFiles.clear();
 		gDeferredFullbrightWaterProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1660,7 +1718,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasGamma = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasTransport = true;
-        gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.hasSrgb = true;
 		gDeferredFullbrightAlphaMaskWaterProgram.mFeatures.mIndexedTextureChannels = LLGLSLShader::sIndexedTextureChannels;
 		gDeferredFullbrightAlphaMaskWaterProgram.mShaderFiles.clear();
 		gDeferredFullbrightAlphaMaskWaterProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -1694,6 +1753,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSkinnedFullbrightProgram.mFeatures.hasTransport = true;
 		gDeferredSkinnedFullbrightProgram.mFeatures.hasObjectSkinning = true;
 		gDeferredSkinnedFullbrightProgram.mFeatures.disableTextureIndex = true;
+		gDeferredSkinnedFullbrightProgram.mFeatures.hasSrgb = true;
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.clear();
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.push_back(make_pair("objects/fullbrightSkinnedV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSkinnedFullbrightProgram.mShaderFiles.push_back(make_pair("deferred/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1751,6 +1811,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredUnderWaterProgram.mFeatures.calculatesAtmospherics = true;
 		gDeferredUnderWaterProgram.mFeatures.hasGamma = true;
 		gDeferredUnderWaterProgram.mFeatures.hasTransport = true;
+		gDeferredUnderWaterProgram.mFeatures.hasSrgb = true;
 		gDeferredUnderWaterProgram.mShaderFiles.clear();
 		gDeferredUnderWaterProgram.mShaderFiles.push_back(make_pair("deferred/waterV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredUnderWaterProgram.mShaderFiles.push_back(make_pair("deferred/underWaterF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1762,6 +1823,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	{
 		gDeferredSoftenProgram.mName = "Deferred Soften Shader";
 		gDeferredSoftenProgram.mShaderFiles.clear();
+		gDeferredSoftenProgram.mFeatures.hasSrgb = true;
 		gDeferredSoftenProgram.mShaderFiles.push_back(make_pair("deferred/softenLightV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredSoftenProgram.mShaderFiles.push_back(make_pair("deferred/softenLightF.glsl", GL_FRAGMENT_SHADER_ARB));
 
@@ -1785,7 +1847,8 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredSoftenWaterProgram.mShaderLevel = mVertexShaderLevel[SHADER_DEFERRED];
 		gDeferredSoftenWaterProgram.addPermutation("WATER_FOG", "1");
 		gDeferredSoftenWaterProgram.mShaderGroup = LLGLSLShader::SG_WATER;
-        gDeferredSoftenWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredSoftenWaterProgram.mFeatures.hasWaterFog = true;
+		gDeferredSoftenWaterProgram.mFeatures.hasSrgb = true;
 
 		if (gSavedSettings.getBOOL("RenderDeferredSSAO"))
 		{ //if using SSAO, take screen space light map into account as if shadows are enabled
@@ -1882,6 +1945,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 		gDeferredAvatarAlphaProgram.mFeatures.hasLighting = false;
 		gDeferredAvatarAlphaProgram.mFeatures.isAlphaLighting = true;
 		gDeferredAvatarAlphaProgram.mFeatures.disableTextureIndex = true;
+		gDeferredAvatarAlphaProgram.mFeatures.hasSrgb = true;
 		gDeferredAvatarAlphaProgram.mShaderFiles.clear();
 		gDeferredAvatarAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredAvatarAlphaProgram.mShaderFiles.push_back(make_pair("deferred/alphaF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -1899,6 +1963,7 @@ BOOL LLViewerShaderMgr::loadShadersDeferred()
 	if (success)
 	{
 		gDeferredPostGammaCorrectProgram.mName = "Deferred Gamma Correction Post Process";
+		gDeferredPostGammaCorrectProgram.mFeatures.hasSrgb = true;
 		gDeferredPostGammaCorrectProgram.mShaderFiles.clear();
 		gDeferredPostGammaCorrectProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredNoTCV.glsl", GL_VERTEX_SHADER_ARB));
 		gDeferredPostGammaCorrectProgram.mShaderFiles.push_back(make_pair("deferred/postDeferredGammaCorrect.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2245,6 +2310,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectFullbrightNonIndexedProgram.mFeatures.hasTransport = true;
 		gObjectFullbrightNonIndexedProgram.mFeatures.isFullbright = true;
 		gObjectFullbrightNonIndexedProgram.mFeatures.disableTextureIndex = true;
+		gObjectFullbrightNonIndexedProgram.mFeatures.hasSrgb = true;
 		gObjectFullbrightNonIndexedProgram.mShaderFiles.clear();
 		gObjectFullbrightNonIndexedProgram.mShaderFiles.push_back(make_pair("objects/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
 		gObjectFullbrightNonIndexedProgram.mShaderFiles.push_back(make_pair("objects/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2260,6 +2326,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectFullbrightNonIndexedWaterProgram.mFeatures.hasWaterFog = true;		
 		gObjectFullbrightNonIndexedWaterProgram.mFeatures.hasTransport = true;
 		gObjectFullbrightNonIndexedWaterProgram.mFeatures.disableTextureIndex = true;
+		gObjectFullbrightNonIndexedWaterProgram.mFeatures.hasSrgb = true;
 		gObjectFullbrightNonIndexedWaterProgram.mShaderFiles.clear();
 		gObjectFullbrightNonIndexedWaterProgram.mShaderFiles.push_back(make_pair("objects/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
 		gObjectFullbrightNonIndexedWaterProgram.mShaderFiles.push_back(make_pair("objects/fullbrightWaterF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2276,6 +2343,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectEmissiveNonIndexedProgram.mFeatures.hasTransport = true;
 		gObjectEmissiveNonIndexedProgram.mFeatures.isFullbright = true;
 		gObjectEmissiveNonIndexedProgram.mFeatures.disableTextureIndex = true;
+		gObjectEmissiveNonIndexedProgram.mFeatures.hasSrgb = true;
 		gObjectEmissiveNonIndexedProgram.mShaderFiles.clear();
 		gObjectEmissiveNonIndexedProgram.mShaderFiles.push_back(make_pair("objects/emissiveV.glsl", GL_VERTEX_SHADER_ARB));
 		gObjectEmissiveNonIndexedProgram.mShaderFiles.push_back(make_pair("objects/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2306,6 +2374,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectFullbrightNoColorProgram.mFeatures.hasGamma = true;
 		gObjectFullbrightNoColorProgram.mFeatures.hasTransport = true;
 		gObjectFullbrightNoColorProgram.mFeatures.isFullbright = true;
+		gObjectFullbrightNoColorProgram.mFeatures.hasSrgb = true;
 		gObjectFullbrightNoColorProgram.mFeatures.disableTextureIndex = true;
 		gObjectFullbrightNoColorProgram.mShaderFiles.clear();
 		gObjectFullbrightNoColorProgram.mShaderFiles.push_back(make_pair("objects/fullbrightNoColorV.glsl", GL_VERTEX_SHADER_ARB));
@@ -2401,6 +2470,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 	{
 		gImpostorProgram.mName = "Impostor Shader";
 		gImpostorProgram.mFeatures.disableTextureIndex = true;
+		gImpostorProgram.mFeatures.hasSrgb = true;
 		gImpostorProgram.mShaderFiles.clear();
 		gImpostorProgram.mShaderFiles.push_back(make_pair("objects/impostorV.glsl", GL_VERTEX_SHADER_ARB));
 		gImpostorProgram.mShaderFiles.push_back(make_pair("objects/impostorF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2546,6 +2616,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectFullbrightProgram.mFeatures.hasGamma = true;
 		gObjectFullbrightProgram.mFeatures.hasTransport = true;
 		gObjectFullbrightProgram.mFeatures.isFullbright = true;
+		gObjectFullbrightProgram.mFeatures.hasSrgb = true;
 		gObjectFullbrightProgram.mFeatures.mIndexedTextureChannels = 0;
 		gObjectFullbrightProgram.mShaderFiles.clear();
 		gObjectFullbrightProgram.mShaderFiles.push_back(make_pair("objects/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -2577,6 +2648,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectEmissiveProgram.mFeatures.hasGamma = true;
 		gObjectEmissiveProgram.mFeatures.hasTransport = true;
 		gObjectEmissiveProgram.mFeatures.isFullbright = true;
+		gObjectEmissiveProgram.mFeatures.hasSrgb = true;
 		gObjectEmissiveProgram.mFeatures.mIndexedTextureChannels = 0;
 		gObjectEmissiveProgram.mShaderFiles.clear();
 		gObjectEmissiveProgram.mShaderFiles.push_back(make_pair("objects/emissiveV.glsl", GL_VERTEX_SHADER_ARB));
@@ -2609,6 +2681,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 		gObjectFullbrightAlphaMaskProgram.mFeatures.hasTransport = true;
 		gObjectFullbrightAlphaMaskProgram.mFeatures.isFullbright = true;
 		gObjectFullbrightAlphaMaskProgram.mFeatures.hasAlphaMask = true;
+		gObjectFullbrightAlphaMaskProgram.mFeatures.hasSrgb = true;
 		gObjectFullbrightAlphaMaskProgram.mFeatures.mIndexedTextureChannels = 0;
 		gObjectFullbrightAlphaMaskProgram.mShaderFiles.clear();
 		gObjectFullbrightAlphaMaskProgram.mShaderFiles.push_back(make_pair("objects/fullbrightV.glsl", GL_VERTEX_SHADER_ARB));
@@ -2731,6 +2804,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 			gSkinnedObjectFullbrightProgram.mFeatures.hasObjectSkinning = true;
 			gSkinnedObjectFullbrightProgram.mFeatures.hasAlphaMask = true;			
 			gSkinnedObjectFullbrightProgram.mFeatures.disableTextureIndex = true;
+			gSkinnedObjectFullbrightProgram.mFeatures.hasSrgb = true;
 			gSkinnedObjectFullbrightProgram.mShaderFiles.clear();
 			gSkinnedObjectFullbrightProgram.mShaderFiles.push_back(make_pair("objects/fullbrightSkinnedV.glsl", GL_VERTEX_SHADER_ARB));
 			gSkinnedObjectFullbrightProgram.mShaderFiles.push_back(make_pair("objects/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));
@@ -2747,6 +2821,7 @@ BOOL LLViewerShaderMgr::loadShadersObject()
 			gSkinnedObjectEmissiveProgram.mFeatures.isFullbright = true;
 			gSkinnedObjectEmissiveProgram.mFeatures.hasObjectSkinning = true;
 			gSkinnedObjectEmissiveProgram.mFeatures.disableTextureIndex = true;
+			gSkinnedObjectEmissiveProgram.mFeatures.hasSrgb = true;
 			gSkinnedObjectEmissiveProgram.mShaderFiles.clear();
 			gSkinnedObjectEmissiveProgram.mShaderFiles.push_back(make_pair("objects/emissiveSkinnedV.glsl", GL_VERTEX_SHADER_ARB));
 			gSkinnedObjectEmissiveProgram.mShaderFiles.push_back(make_pair("objects/fullbrightF.glsl", GL_FRAGMENT_SHADER_ARB));