1 files changed, 66 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
new file mode 100644
index 0000000000..2425a2ad04
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+++ b/indra/newview/app_settings/shaders/class1/windlight/moonF.glsl
@@ -0,0 +1,66 @@
+/** 
+ * @file class1\wl\moonF.glsl
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, 2020 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
+ * $/LicenseInfo$
+ */
+ 
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+uniform vec4 color;
+uniform vec4 sunlight_color;
+uniform vec4 moonlight_color;
+uniform vec3 moon_dir;
+uniform float moon_brightness;
+uniform sampler2D diffuseMap;
+
+VARYING vec2 vary_texcoord0;
+
+vec3 scaleSoftClip(vec3 light);
+
+void main() 
+{
+    // Restore Pre-EEP alpha fade moon near horizon
+    float fade = 1.0;
+    if( moon_dir.z > 0 )
+        fade = clamp( moon_dir.z*moon_dir.z*4.0, 0.0, 1.0 );
+
+    vec4 c     = texture2D(diffuseMap, vary_texcoord0.xy);
+//       c.rgb = pow(c.rgb, vec3(0.7f)); // can't use "srgb_to_linear(color.rgb)" as that is a deferred only function
+         c.rgb *= moonlight_color.rgb;
+         c.rgb *= moon_brightness;
+
+         c.rgb *= fade;
+         c.a   *= fade;
+
+         c.rgb  = scaleSoftClip(c.rgb);
+
+    frag_color = vec4(c.rgb, c.a);
+}
+