NORSPEC-293 better fix incorporating srgb_to_linear curve and applying texture gamma corrections to spot inputs

3 files changed, 64 insertions, 6 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightAlphaMaskF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightAlphaMaskF.glsl
index 5aa31b96df..3d93583e1e 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightAlphaMaskF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightAlphaMaskF.glsl
@@ -41,6 +41,26 @@ VARYING vec2 vary_texcoord0;
 vec3 fullbrightAtmosTransport(vec3 light);
 vec3 fullbrightScaleSoftClip(vec3 light);
 
+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 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*/
+
+	return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
+}
+
 uniform float minimum_alpha;
 
 void main() 
@@ -56,13 +76,13 @@ void main()
 		discard;
 	}
 
-	color.rgb = pow(color.rgb,vec3(2.2f,2.2f,2.2f));
+	color.rgb = srgb_to_linear(color.rgb);
 	color.rgb *= vertex_color.rgb;
 
 	color.rgb = fullbrightAtmosTransport(color.rgb);
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
 
-	color.rgb = pow(color.rgb, vec3(1.0/2.2));
+	color.rgb = linear_to_srgb(color.rgb);
 
 	frag_color.rgb = color.rgb;
 	frag_color.a   = color.a;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index 5bdb3115d9..ec25f52ef5 100755
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -41,6 +41,25 @@ VARYING vec2 vary_texcoord0;
 vec3 fullbrightAtmosTransport(vec3 light);
 vec3 fullbrightScaleSoftClip(vec3 light);
 
+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 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*/
+
+	return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
+}
 
 void main() 
 {
@@ -50,14 +69,13 @@ void main()
 	vec4 color = texture2D(diffuseMap, vary_texcoord0.xy);
 #endif
 
-	color.rgb = pow(color.rgb,vec3(2.2f,2.2f,2.2f));
+	color.rgb = srgb_to_linear(color.rgb);
 	color.rgb *= vertex_color.rgb;
 
 	color.rgb = fullbrightAtmosTransport(color.rgb);
 	color.rgb = fullbrightScaleSoftClip(color.rgb);
 
-	// NORSPEC-293
-	//color.rgb = pow(color.rgb, vec3(1.0/2.2));
+	color.rgb = linear_to_srgb(color.rgb);
 
 	frag_color.rgb = color.rgb;
 	frag_color.a   = color.a;
diff --git a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
index 045d1a00cd..61262c9eb5 100755
--- a/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/spotLightF.glsl
@@ -82,9 +82,29 @@ 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 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*/
+
+	return 1.055 * pow(cl, vec3(0.41666)) - 0.055;
+}
+
 vec4 correctWithGamma(vec4 col)
 {
-	return vec4(pow(col.rgb, vec3(2.2)), col.a);
+	return vec4(srgb_to_linear(col.rgb), col.a);
 }
 
 vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)