1 files changed, 16 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/globalF.glsl b/indra/newview/app_settings/shaders/class1/deferred/globalF.glsl
index d493976eba..9060d358cf 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/globalF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/globalF.glsl
@@ -43,3 +43,19 @@ void mirrorClip(vec3 pos)
     }
 }
 
+vec4 encodeNormal(vec3 n, float env, float gbuffer_flag)
+{
+    float f = sqrt(8 * n.z + 8);
+    return vec4(n.xy / f + 0.5, env, gbuffer_flag);
+}
+
+vec4 decodeNormal(vec4 norm)
+{
+    vec2 fenc = norm.xy*4-2;
+    float f = dot(fenc,fenc);
+    float g = sqrt(1-f/4);
+    vec4 n;
+    n.xy = fenc*g;
+    n.z = 1-f/2;
+    return n;
+}