From 68875523e09f9fe06fc4b3cd5225995bb13966c3 Mon Sep 17 00:00:00 2001
From: RunitaiLinden <davep@lindenlab.com>
Date: Thu, 30 Nov 2023 12:01:45 -0600
Subject: SL-20611 Incorporate water haze into new post effect atmospherics
 goodness

---
 .../shaders/class3/deferred/hazeF.glsl             | 16 +++---
 .../shaders/class3/deferred/waterHazeF.glsl        | 13 +----
 .../shaders/class3/deferred/waterHazeV.glsl        | 59 ++++++++++++++++++++++
 3 files changed, 68 insertions(+), 20 deletions(-)
 create mode 100644 indra/newview/app_settings/shaders/class3/deferred/waterHazeV.glsl

(limited to 'indra/newview/app_settings/shaders/class3/deferred')

diff --git a/indra/newview/app_settings/shaders/class3/deferred/hazeF.glsl b/indra/newview/app_settings/shaders/class3/deferred/hazeF.glsl
index 7b77a2f5fb..e8f7d73f1f 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/hazeF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/hazeF.glsl
@@ -68,23 +68,21 @@ void main()
     calcAtmosphericVarsLinear(pos.xyz, norm.xyz, light_dir, sunlit, amblit, additive, atten);
 
     vec3 sunlit_linear = srgb_to_linear(sunlit);
-    vec3 amblit_linear = amblit;
-
+    
+    // mask off atmospherics below water (when camera is under water)
     bool do_atmospherics = false;
-
-    // mask off atmospherics below water
-    if (dot(pos.xyz, waterPlane.xyz) + waterPlane.w > 0.0)
+        
+    if (dot(vec3(0), waterPlane.xyz) + waterPlane.w > 0.0 ||
+        dot(pos.xyz, waterPlane.xyz) + waterPlane.w > 0.0)
     {
         do_atmospherics = true;
     }
+    
 
     vec3  irradiance = vec3(0);
     vec3  radiance  = vec3(0);
 
-    if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
-    {
-    }
-    else if (!GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_ATMOS))
+    if (depth >= 1.0)
     {
         //should only be true of WL sky, just port over base color value
         discard;
diff --git a/indra/newview/app_settings/shaders/class3/deferred/waterHazeF.glsl b/indra/newview/app_settings/shaders/class3/deferred/waterHazeF.glsl
index f63d70cbd7..025bcdaf3e 100644
--- a/indra/newview/app_settings/shaders/class3/deferred/waterHazeF.glsl
+++ b/indra/newview/app_settings/shaders/class3/deferred/waterHazeF.glsl
@@ -26,7 +26,7 @@
 out vec4 frag_color;
 
 // Inputs
-in vec2 vary_fragcoord;
+in vec4 vary_fragcoord;
 
 uniform sampler2D normalMap;
 
@@ -37,20 +37,11 @@ vec4 getWaterFogView(vec3 pos);
 
 void main()
 {
-    vec2  tc           = vary_fragcoord.xy;
+    vec2  tc           = vary_fragcoord.xy/vary_fragcoord.w*0.5+0.5;
     float depth        = getDepth(tc.xy);
     vec4  pos          = getPositionWithDepth(tc, depth);
     vec4  norm         = texture(normalMap, tc);
 
-    if (GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_PBR))
-    {
-    }
-    else if (!GET_GBUFFER_FLAG(GBUFFER_FLAG_HAS_ATMOS))
-    {
-        //should only be true of WL sky, just port over base color value
-        discard;
-    }
-
     vec4 fogged = getWaterFogView(pos.xyz);
 
     frag_color.rgb = max(fogged.rgb, vec3(0)); //output linear since local lights will be added to this shader's results
diff --git a/indra/newview/app_settings/shaders/class3/deferred/waterHazeV.glsl b/indra/newview/app_settings/shaders/class3/deferred/waterHazeV.glsl
new file mode 100644
index 0000000000..16381a5d51
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class3/deferred/waterHazeV.glsl
@@ -0,0 +1,59 @@
+/**
+ * @file class3/deferred/waterHazeV.glsl
+ *
+ * $LicenseInfo:firstyear=2023&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2023, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+in vec3 position;
+
+uniform vec2 screen_res;
+
+out vec4 vary_fragcoord;
+
+// forwards
+void setAtmosAttenuation(vec3 c);
+void setAdditiveColor(vec3 c);
+
+uniform vec4 waterPlane;
+
+uniform int above_water;
+
+uniform mat4 modelview_projection_matrix;
+
+void main()
+{
+	//transform vertex
+	vec4 pos = vec4(position.xyz, 1.0);
+
+    if (above_water > 0)
+    {
+        pos = modelview_projection_matrix*pos;
+    }
+
+    gl_Position = pos; 
+
+    // appease OSX GLSL compiler/linker by touching all the varyings we said we would
+    setAtmosAttenuation(vec3(1));
+    setAdditiveColor(vec3(0));
+
+	vary_fragcoord = pos;
+}
-- 
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