SL-19564 Rebalance exposure and sky. Hack legacy diffuse map saturation and brightness to allow ACES Hill all the time.

5 files changed, 43 insertions, 19 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/exposureF.glsl b/indra/newview/app_settings/shaders/class1/deferred/exposureF.glsl
index 7ed8e4c8ce..81f1e9aed0 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/exposureF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/exposureF.glsl
@@ -48,8 +48,11 @@ void main()
     vec2 tc = vec2(0.5,0.5);
 
     float L = textureLod(emissiveRect, tc, 8).r;
-
-    float s = clamp(dynamic_exposure_params.x/L, dynamic_exposure_params.y, dynamic_exposure_params.z);
+    float max_L = dynamic_exposure_params.x;
+    L = clamp(L, 0.0, max_L);
+    L /= max_L;
+    L = pow(L, 2.0);
+    float s = mix(dynamic_exposure_params.z, dynamic_exposure_params.y, L);
 
     float prev = texture(exposureMap, vec2(0.5,0.5)).r;
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
index b5eae3a1d5..11532135dd 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/fullbrightF.glsl
@@ -42,6 +42,7 @@ vec4 applyWaterFogView(vec3 pos, vec4 color);
 #endif
 
 vec3 srgb_to_linear(vec3 cs);
+vec3 legacy_adjust(vec3 c);
 vec3 linear_to_srgb(vec3 cl);
 vec3 fullbrightAtmosTransport(vec3 light);
 
@@ -87,6 +88,7 @@ void main()
 #endif
 
 #ifndef IS_HUD
+    color.rgb = legacy_adjust(color.rgb);
     color.rgb = srgb_to_linear(color.rgb);
     color.rgb = fullbrightAtmosTransport(color.rgb);
     
diff --git a/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl b/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
index e63e666778..e0eb91480e 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/luminanceF.glsl
@@ -44,9 +44,9 @@ float lum(vec3 col)
 void main() 
 {
     vec2 tc = vary_fragcoord*0.6+0.2;
+    tc.y -= 0.1;
     vec3 c = texture(diffuseRect, tc).rgb + texture(emissiveRect, tc).rgb;
     float L = lum(c);
-
     frag_color = vec4(L);
 }
 
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
index ae6bdbba95..de766d6bc7 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredGammaCorrect.glsl
@@ -105,29 +105,21 @@ vec3 toneMapACES_Hill(vec3 color)
 uniform float exposure;
 uniform float gamma;
 
+vec3 legacy_adjust_post(vec3 c);
+
 vec3 toneMap(vec3 color, float gs)
 {
     float exp_scale = texture(exposureMap, vec2(0.5,0.5)).r;
 
     color *= exposure * exp_scale * gs;
 
-#ifdef TONEMAP_ACES_NARKOWICZ
-    color = toneMapACES_Narkowicz(color);
-#endif
-
-#ifdef TONEMAP_ACES_HILL
     color = toneMapACES_Hill(color);
-#endif
 
-#ifdef TONEMAP_ACES_HILL_EXPOSURE_BOOST
-    // boost exposure as discussed in https://github.com/mrdoob/three.js/pull/19621
-    // this factor is based on the exposure correction of Krzysztof Narkowicz in his
-    // implemetation of ACES tone mapping
-    color *= 1.0/0.6;
-    color = toneMapACES_Hill(color);
-#endif
+    color = linear_to_srgb(color);
 
-    return linear_to_srgb(color);
+    color = legacy_adjust_post(color);
+
+    return color;
 }
 
 //===============================================================
@@ -181,7 +173,7 @@ vec3 legacyGamma(vec3 color)
 
 float legacyGammaApprox()
 {
- //TODO -- figure out how to plumb this in as a uniform
+    //TODO -- figure out how to plumb this in as a uniform
     float c = 0.5;
     float gc = 1.0-pow(c, gamma);
     
diff --git a/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
index 4a8b892c3a..a3b48e0898 100644
--- a/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
+++ b/indra/newview/app_settings/shaders/class1/environment/srgbF.glsl
@@ -72,7 +72,7 @@ vec3 rgb2hsv(vec3 c)
     vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
 
     float d = q.x - min(q.w, q.y);
-    float e = 1.0e-10;
+    float e = 1.0e-3;
     return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
 }
 
@@ -82,3 +82,30 @@ vec3 hsv2rgb(vec3 c)
     vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
     return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
 }
+
+vec3 legacy_adjust_no_brighten(vec3 c)
+{
+    vec3 desat = rgb2hsv(c.rgb);
+    desat.g *= 0.75;
+    desat.rgb = hsv2rgb(desat);
+    return desat;
+}
+
+vec3 legacy_adjust(vec3 c)
+{
+#if 1
+    vec3 desat = rgb2hsv(c.rgb);
+    desat.g *= 1.0-(1.0-desat.b)*0.5;
+    //desat.g = max(desat.g-0.1*c.b-0.1, 0.0);
+    desat.b += (1.0-desat.b)*0.1f;
+    desat.rgb = hsv2rgb(desat);
+    return desat;
+#else
+    return c;
+#endif
+}
+
+vec3 legacy_adjust_post(vec3 c)
+{
+    return c;
+}