From 0940e8871894e08da80730d11c31cbd252a05b35 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Tue, 24 May 2022 10:34:47 -0500
Subject: SL-17472 Add checkbox to preferences for enabling "PBR" that uses
 "class3" deferred shaders.  Move reflection probe shaders to class3 and
 restore class2 shaders to non-reflection probe versions.

---
 .../shaders/class1/deferred/materialF.glsl         | 64 +++++++++++-----------
 1 file changed, 31 insertions(+), 33 deletions(-)

(limited to 'indra/newview/app_settings/shaders/class1/deferred/materialF.glsl')

diff --git a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
index c5b1937cfb..02d83925ea 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/materialF.glsl
@@ -64,13 +64,6 @@ out vec4 frag_color;
 float sampleDirectionalShadow(vec3 pos, vec3 norm, vec2 pos_screen);
 #endif
 
-#ifdef HAS_REFLECTION_PROBES
-void sampleReflectionProbes(inout vec3 ambenv, inout vec3 glossenv, inout vec3 legacyenv, 
-        vec3 pos, vec3 norm, float glossiness, float envIntensity);
-void applyGlossEnv(inout vec3 color, vec3 glossenv, vec4 spec, vec3 pos, vec3 norm);
-void applyLegacyEnv(inout vec3 color, vec3 legacyenv, vec4 spec, vec3 pos, vec3 norm, float envIntensity);
-#endif
-
 uniform samplerCube environmentMap;
 uniform sampler2D     lightFunc;
 
@@ -329,16 +322,6 @@ void main()
     // lighting from the sun stays sharp
     float da = clamp(dot(normalize(norm.xyz), light_dir.xyz), 0.0, 1.0);
     da = pow(da, 1.0 / 1.3);
-    vec3 sun_contrib = min(da, shadow) * sunlit;
-
-#ifdef HAS_REFLECTION_PROBES
-    vec3 ambenv;
-    vec3 glossenv;
-    vec3 legacyenv;
-    sampleReflectionProbes(ambenv, glossenv, legacyenv, pos.xyz, norm.xyz, spec.a, envIntensity);
-    amblit = max(ambenv, amblit);
-    color.rgb = amblit;
-#else
 
     color = amblit;
 
@@ -350,8 +333,9 @@ void main()
     ambient *= ambient;
     ambient = (1.0 - ambient);
 
+    vec3 sun_contrib = min(da, shadow) * sunlit;
+    
     color *= ambient;
-#endif
 
     color += sun_contrib;
 
@@ -361,6 +345,35 @@ void main()
 
     if (spec.a > 0.0)  // specular reflection
     {
+        /*  // Reverting this specular calculation to previous 'dumbshiny' version - DJH 6/17/2020
+            // Preserving the refactored version as a comment for potential reconsideration,
+            // overriding the general rule to avoid pollutiong the source with commented code.
+            //
+            //  If you're reading this in 2021+, feel free to obliterate.
+
+        vec3 npos = -normalize(pos.xyz);
+
+        //vec3 ref = dot(pos+lv, norm);
+        vec3 h = normalize(light_dir.xyz + npos);
+        float nh = dot(norm.xyz, h);
+        float nv = dot(norm.xyz, npos);
+        float vh = dot(npos, h);
+        float sa = nh;
+        float fres = pow(1 - dot(h, npos), 5)*0.4 + 0.5;
+
+        float gtdenom = 2 * nh;
+        float gt = max(0, min(gtdenom * nv / vh, gtdenom * da / vh));
+
+        if (nh > 0.0)
+        {
+            float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt / (nh*da);
+            vec3 sp = sun_contrib*scol / 6.0f;
+            sp = clamp(sp, vec3(0), vec3(1));
+            bloom = dot(sp, sp) / 4.0;
+            color += sp * spec.rgb;
+        }
+        */
+
         float sa        = dot(refnormpersp, sun_dir.xyz);
         vec3  dumbshiny = sunlit * shadow * (texture2D(lightFunc, vec2(sa, spec.a)).r);
 
@@ -372,24 +385,10 @@ void main()
         glare = max(glare, spec_contrib.b);
 
         color += spec_contrib;
-
-#ifdef HAS_REFLECTION_PROBES
-        applyGlossEnv(color, glossenv, spec, pos.xyz, norm.xyz);
-#endif
     }
 
-
     color = mix(color.rgb, diffcol.rgb, diffuse.a);
 
-#ifdef HAS_REFLECTION_PROBES
-    if (envIntensity > 0.0)
-    {  // add environmentmap
-        //fudge darker
-        legacyenv *= 0.5*diffuse.a+0.5;
-        
-        applyLegacyEnv(color, legacyenv, spec, pos.xyz, norm.xyz, envIntensity);
-    }
-#else
     if (envIntensity > 0.0)
     {
         //add environmentmap
@@ -404,7 +403,6 @@ void main()
         cur_glare *= envIntensity*4.0;
         glare += cur_glare;
     }
-#endif
 
     color = atmosFragLighting(color, additive, atten);
     color = scaleSoftClipFrag(color);
-- 
cgit v1.2.3