WIP - Windlight sun lighting should happen in sRGB space, not linear space. This keeps ambient from getting overblown and better matches environment lighting with ALM on/off.

3 files changed, 10 insertions, 7 deletions

diff --git a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
index 7cde67d11b..5d7a28c359 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
@@ -192,8 +192,9 @@ void main()
         
     vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb;
     // SL-12005 Projector light pops as we get closer, more objectionable than being in wrong color space.
-    //          We can't switch to linear here unless we do it everywhere
-    //diff_tex.rgb = srgb_to_linear(diff_tex.rgb);
+    //          We can't switch to linear here unless we do it everywhere*
+    // *gbuffer IS sRGB, convert to linear since this shader outputs linear
+    diff_tex.rgb = srgb_to_linear(diff_tex.rgb);
  
     vec4 spec = texture2DRect(specularRect, frag.xy);
 
@@ -296,6 +297,7 @@ void main()
     //not sure why, but this line prevents MATBUG-194
     col = max(col, vec3(0.0));
 
-    frag_color.rgb = col;   
+    //output linear
+    frag_color.rgb = col;
     frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index bacdb6f70f..58d573c724 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -106,7 +106,7 @@ void main()
         vec3 atten;
     
         calcAtmosphericVars(pos.xyz, light_dir, ambocc, sunlit, amblit, additive, atten, true);
-
+        
         float ambient = da;
         ambient *= 0.5;
         ambient *= ambient;
@@ -127,7 +127,7 @@ vec3 post_ambient = color.rgb;
 
 vec3 post_sunlight = color.rgb;
 
-        color.rgb *= diffuse_linear.rgb;
+        color.rgb *= diffuse_srgb.rgb;
 
 vec3 post_diffuse = color.rgb;
 
@@ -218,6 +218,6 @@ vec3 post_atmo = color.rgb;
 
         //output linear RGB as lights are summed up in linear space and then gamma corrected prior to the 
         //post deferred passes
-    frag_color.rgb = color.rgb;
+    frag_color.rgb = srgb_to_linear(color.rgb);
     frag_color.a = bloom;
 }
diff --git a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
index 77f6e6f7ac..5ab0b5c5b4 100644
--- a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
@@ -189,7 +189,7 @@ void main()
 	lv = normalize(lv);
 	float da = dot(norm, lv);
 		
-	vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb;
+	vec3 diff_tex = srgb_to_linear(texture2DRect(diffuseRect, frag.xy).rgb);
 	vec4 spec = texture2DRect(specularRect, frag.xy);
 	vec3 dlit = vec3(0, 0, 0);
 
@@ -287,6 +287,7 @@ void main()
 	//not sure why, but this line prevents MATBUG-194
 	col = max(col, vec3(0.0));
 
+	//output linear colors as gamma correction happens down stream
 	frag_color.rgb = col;	
 	frag_color.a = 0.0;
 }