SL-18190 WIP -- Take 2 on linear space windlight (more methodical approach -- make desired interface but brute force color conversions). Placeholder PBR water and move to deprecate forward rendering shaders.

1 files changed, 16 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl b/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl
index 68db7fcbb1..6dfb2e7cf6 100644
--- a/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl
+++ b/indra/newview/app_settings/shaders/class2/windlight/gammaF.glsl
@@ -28,6 +28,22 @@ uniform int no_atmo;
 vec3 getAtmosAttenuation();
 vec3 getAdditiveColor();
 
+vec3 srgb_to_linear(vec3 col);
+vec3 linear_to_srgb(vec3 col);
+
+vec3 scaleSoftClipFragLinear(vec3 light)
+{
+    if (no_atmo == 1)
+    {
+        return light;
+    }
+    light = linear_to_srgb(light);
+    //soft clip effect:
+    light = 1. - clamp(light, vec3(0.), vec3(1.));
+    light = 1. - pow(light, vec3(gamma)); // s/b inverted already CPU-side
+    return srgb_to_linear(light);
+}
+
 vec3 scaleSoftClipFrag(vec3 light)
 {
     if (no_atmo == 1)