NORSPEC-325 WIP restore gamma (uncorrected) attenuation and unify sRGB conversion in one place

3 files changed, 16 insertions, 56 deletions

diff --git a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
index 4af0970726..6d1cedee39 100755
--- a/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/multiSpotLightF.glsl
@@ -68,6 +68,9 @@ uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
+
 vec2 encode_normal(vec3 n)
 {
 	float f = sqrt(8 * n.z + 8);
@@ -85,22 +88,11 @@ vec3 decode_normal (vec2 enc)
     return n;
 }
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	
-/*        {  cs / 12.92,                 cs <= 0.04045
-    cl = {
-        {  ((cs + 0.055)/1.055)^2.4,   cs >  0.04045*/
-
-	return pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-}
-
 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);
@@ -207,7 +199,7 @@ void main()
 	
 	proj_tc.xyz /= proj_tc.w;
 	
-	float fa = falloff;
+	float fa = falloff+1.0;
 	float dist_atten = min(1.0-(dist-1.0*(1.0-fa))/fa, 1.0);
 	dist_atten *= dist_atten;
 	dist_atten *= 2.0;
diff --git a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
index fa67c4ecea..db2faa65d7 100755
--- a/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/softenLightF.glsl
@@ -78,35 +78,8 @@ vec3 vary_AtmosAttenuation;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	
-/*        {  cs / 12.92,                 cs <= 0.04045
-    cl = {
-        {  ((cs + 0.055)/1.055)^2.4,   cs >  0.04045*/
-
-	vec3 low_range = cs / vec3(12.92);
-
-	if (((cs.r + cs.g + cs.b) / 3) <= 0.04045)
-		return low_range;
-
-	return pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-}
-
-vec3 linear_to_srgb(vec3 cl)
-{
-	    /*{  0.0,                          0         <= cl
-            {  12.92 * c,                    0         <  cl < 0.0031308
-    cs = {  1.055 * cl^0.41666 - 0.055,   0.0031308 <= cl < 1
-            {  1.0,                                       cl >= 1*/
-
-	cl = clamp(cl, vec3(0), vec3(1));
-
-	if ((cl.r+cl.g+cl.b) < 0.0031308)
-		return 12.92 * cl;
-
-	return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec2 encode_normal(vec3 n)
 {
@@ -395,8 +368,8 @@ void main()
 		
 	float da = max(dot(norm.xyz, sun_dir.xyz), 0.0);
 
-	//float light_gamma = 1.0/1.3;
-	//da = pow(da, light_gamma);
+	float light_gamma = 1.0/1.3;
+	da = pow(da, light_gamma);
 
 
 	vec4 diffuse = texture2DRect(diffuseRect, tc);
@@ -410,10 +383,12 @@ void main()
 		vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
 		
 		vec2 scol_ambocc = texture2DRect(lightMap, vary_fragcoord.xy).rg;
-		//scol_ambocc = pow(scol_ambocc, vec2(light_gamma));
+		scol_ambocc = pow(scol_ambocc, vec2(light_gamma));
 
 		float scol = max(scol_ambocc.r, diffuse.a); 
 
+		
+
 		float ambocc = scol_ambocc.g;
 	
 		calcAtmospherics(pos.xyz, ambocc);
@@ -430,7 +405,6 @@ void main()
 	
 		col *= diffuse.rgb;
 	
-
 		vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
 
 		if (spec.a > 0.0) // specular reflection
@@ -456,7 +430,8 @@ void main()
 			
 			vec3 refcol = textureCube(environmentMap, env_vec).rgb;
 
-			col = mix(col.rgb, refcol, envIntensity);  
+			col = mix(col.rgb, refcol, 
+				envIntensity);  
 
 		}
 	
diff --git a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
index 544a0a6730..cfb483ab54 100755
--- a/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class2/deferred/spotLightF.glsl
@@ -85,15 +85,8 @@ vec3 decode_normal (vec2 enc)
     return n;
 }
 
-vec3 srgb_to_linear(vec3 cs)
-{
-	
-/*        {  cs / 12.92,                 cs <= 0.04045
-    cl = {
-        {  ((cs + 0.055)/1.055)^2.4,   cs >  0.04045*/
-
-	return pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
-}
+vec3 srgb_to_linear(vec3 cs);
+vec3 linear_to_srgb(vec3 cl);
 
 vec4 correctWithGamma(vec4 col)
 {
@@ -204,7 +197,7 @@ void main()
 	
 	proj_tc.xyz /= proj_tc.w;
 	
-	float fa = falloff;
+	float fa = falloff+1.0;
 	float dist_atten = min(1.0-(dist-1.0*(1.0-fa))/fa, 1.0);
 	dist_atten *= dist_atten;
 	dist_atten *= 2.0;