From c4032528aff8ef1938e897ec583bbf25a3e713e1 Mon Sep 17 00:00:00 2001
From: Graham Linden <graham@lindenlab.com>
Date: Thu, 2 May 2019 13:49:35 -0700
Subject: Roll back sRGB decode changes from contrib for now.

Fix direct light matching across alpha/blended-material/deferred.

Get diffuse lighting to match from Low to Ultra.
---
 .../shaders/class3/deferred/multiSpotLightF.glsl         | 16 ++--------------
 .../app_settings/shaders/class3/deferred/spotLightF.glsl | 11 -----------
 .../shaders/class3/deferred/underWaterF.glsl             |  3 ---
 .../app_settings/shaders/class3/deferred/waterF.glsl     |  1 -
 .../app_settings/shaders/class3/lighting/lightV.glsl     |  6 +++---
 5 files changed, 5 insertions(+), 32 deletions(-)

(limited to 'indra/newview/app_settings/shaders/class3')

diff --git a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
index abb6a3a5d8..52de7ceaad 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/multiSpotLightF.glsl
@@ -71,19 +71,11 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
 vec3 getNorm(vec2 pos_screen);
 
-vec4 correctWithGamma(vec4 col)
-{
-    return vec4(srgb_to_linear(col.rgb), col.a);
-}
-
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret.rgb = srgb_to_linear(ret.rgb);
     
     vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
     
@@ -103,7 +95,6 @@ vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret = correctWithGamma(ret);
 
     vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
     
@@ -121,7 +112,6 @@ vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret = correctWithGamma(ret);
 
     vec2 dist = tc-vec2(0.5);
     
@@ -260,10 +250,6 @@ void main()
             //col += spec.rgb;
         }
     }   
-    
-    
-    
-    
 
     if (envIntensity > 0.0)
     {
@@ -297,6 +283,8 @@ void main()
     //not sure why, but this line prevents MATBUG-194
     col = max(col, vec3(0.0));
 
+    col = scaleDownLight(col);
+
     frag_color.rgb = col;   
     frag_color.a = 0.0;
 }
diff --git a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
index afc542b8bc..bccd819a43 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/spotLightF.glsl
@@ -72,18 +72,10 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 
 vec3 getNorm(vec2 pos_screen);
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
-vec4 correctWithGamma(vec4 col)
-{
-    return vec4(srgb_to_linear(col.rgb), col.a);
-}
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret.rgb = srgb_to_linear(ret.rgb);
     
     vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
     
@@ -103,7 +95,6 @@ vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret = correctWithGamma(ret);
     
     vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
     
@@ -121,7 +112,6 @@ vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
 vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
 {
     vec4 ret = texture2DLod(projectionMap, tc, lod);
-    ret = correctWithGamma(ret);
     
     vec2 dist = tc-vec2(0.5);
     
@@ -256,7 +246,6 @@ void main()
         {
             float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
             col += dlit*scol*spec.rgb*shadow;
-            //col += spec.rgb;
         }
     }   
     
diff --git a/indra/newview/app_settings/shaders/class3/deferred/underWaterF.glsl b/indra/newview/app_settings/shaders/class3/deferred/underWaterF.glsl
index 9d18d1afd8..540226e672 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/underWaterF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/underWaterF.glsl
@@ -58,9 +58,6 @@ VARYING vec4 refCoord;
 VARYING vec4 littleWave;
 VARYING vec4 view;
 
-vec3 srgb_to_linear(vec3 cs);
-vec3 linear_to_srgb(vec3 cl);
-
 vec2 encode_normal(vec3 n);
 
 vec4 applyWaterFog(vec4 color, vec3 viewVec)
diff --git a/indra/newview/app_settings/shaders/class3/deferred/waterF.glsl b/indra/newview/app_settings/shaders/class3/deferred/waterF.glsl
index 2a144ba23a..c65cf48c67 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/waterF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/waterF.glsl
@@ -61,7 +61,6 @@ VARYING vec4 view;
 VARYING vec4 vary_position;
 
 vec3 scaleSoftClip(vec3 c);
-vec3 srgb_to_linear(vec3 cs);
 vec2 encode_normal(vec3 n);
 
 vec3 BlendNormal(vec3 bump1, vec3 bump2)
diff --git a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
index f5428077fa..69267621a3 100644
--- a/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
+++ b/indra/newview/app_settings/shaders/class3/lighting/lightV.glsl
@@ -31,8 +31,8 @@ vec4 sumLights(vec3 pos, vec3 norm, vec4 color);
 
 vec4 calcLighting(vec3 pos, vec3 norm, vec4 color)
 {
-	vec4 c = sumLights(pos, norm, color) * 2.0;
-    c.rgb += atmosAmbient() * color.rgb * 0.5;
-    return c; 
+	vec4 c = sumLights(pos, norm, color * 2.0);
+    c.rgb += atmosAmbient() * color.rgb;
+    return c * 2.0; 
 }
 
-- 
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