1 files changed, 42 insertions, 33 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
index 5ef3d63eb2..3ea2248bec 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
@@ -50,6 +50,7 @@ SOFTWARE.
 
 uniform sampler2D   normalMap;
 uniform sampler2D   depthMap;
+uniform sampler2D emissiveRect;
 uniform sampler2D projectionMap; // rgba
 uniform sampler2D brdfLut;
 
@@ -140,40 +141,11 @@ vec2 getScreenCoordinate(vec2 screenpos)
     return sc - vec2(1.0, 1.0);
 }
 
-// See: https://aras-p.info/texts/CompactNormalStorage.html
-//      Method #4: Spheremap Transform, Lambert Azimuthal Equal-Area projection
-vec3 getNorm(vec2 screenpos)
+vec4 getNorm(vec2 screenpos)
 {
-   vec2 enc = texture(normalMap, screenpos.xy).xy;
-   vec2 fenc = enc*4-2;
-   float f = dot(fenc,fenc);
-   float g = sqrt(1-f/4);
-   vec3 n;
-   n.xy = fenc*g;
-   n.z = 1-f/2;
-   return n;
-}
-
-vec3 getNormalFromPacked(vec4 packedNormalEnvIntensityFlags)
-{
-   vec2 enc = packedNormalEnvIntensityFlags.xy;
-   vec2 fenc = enc*4-2;
-   float f = dot(fenc,fenc);
-   float g = sqrt(1-f/4);
-   vec3 n;
-   n.xy = fenc*g;
-   n.z = 1-f/2;
-   return normalize(n); // TODO: Is this normalize redundant?
-}
-
-// return packedNormalEnvIntensityFlags since GBUFFER_FLAG_HAS_PBR needs .w
-// See: C++: addDeferredAttachments(), GLSL: softenLightF
-vec4 getNormalEnvIntensityFlags(vec2 screenpos, out vec3 n, out float envIntensity)
-{
-    vec4 packedNormalEnvIntensityFlags = texture(normalMap, screenpos.xy);
-    n = getNormalFromPacked( packedNormalEnvIntensityFlags );
-    envIntensity = packedNormalEnvIntensityFlags.z;
-    return packedNormalEnvIntensityFlags;
+    vec4 norm = texture(normalMap, screenpos.xy);
+    norm.xyz = normalize(norm.xyz);
+    return norm;
 }
 
 // get linear depth value given a depth buffer sample d and znear and zfar values
@@ -515,6 +487,43 @@ vec3 pbrPunctual(vec3 diffuseColor, vec3 specularColor,
     return clamp(color, vec3(0), vec3(10));
 }
 
+vec3 pbrCalcPointLightOrSpotLight(vec3 diffuseColor, vec3 specularColor,
+                    float perceptualRoughness,
+                    float metallic,
+                    vec3 n, // normal
+                    vec3 p, // pixel position
+                    vec3 v, // view vector (negative normalized pixel position)
+                    vec3 lp, // light position
+                    vec3 ld, // light direction (for spotlights)
+                    vec3 lightColor,
+                    float lightSize, float falloff, float is_pointlight, float ambiance)
+{
+    vec3 color = vec3(0,0,0);
+
+    vec3 lv = lp.xyz - p;
+
+    float lightDist = length(lv);
+
+    float dist = lightDist / lightSize;
+    if (dist <= 1.0)
+    {
+        lv /= lightDist;
+
+        float dist_atten = calcLegacyDistanceAttenuation(dist, falloff);
+
+        // spotlight coefficient.
+        float spot = max(dot(-ld, lv), is_pointlight);
+        // spot*spot => GL_SPOT_EXPONENT=2
+        float spot_atten = spot*spot;
+
+        vec3 intensity = spot_atten * dist_atten * lightColor * 3.0; //magic number to balance with legacy materials
+
+        color = intensity*pbrPunctual(diffuseColor, specularColor, perceptualRoughness, metallic, n.xyz, v, lv);
+    }
+
+    return color;
+}
+
 void calcDiffuseSpecular(vec3 baseColor, float metallic, inout vec3 diffuseColor, inout vec3 specularColor)
 {
     vec3 f0 = vec3(0.04);