Merge branch 'master' into DRTVWR-507-maint

1 files changed, 51 insertions, 0 deletions

diff --git a/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl
new file mode 100644
index 0000000000..206a51db27
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class1/windlight/atmosphericsHelpersF.glsl
@@ -0,0 +1,51 @@
+/** 
+ * @file class1\windlight\atmosphericsHelpersF.glsl 
+ *
+ * $LicenseInfo:firstyear=2005&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2005, 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
+ * $/LicenseInfo$
+ */
+ 
+uniform vec4 sunlight_color;
+uniform vec4 light_ambient;
+uniform int no_atmo;
+
+vec3 atmosAmbient()
+{
+    if (no_atmo == 1) return vec3(0.16);
+    return light_ambient.rgb;
+}
+
+vec3 atmosAffectDirectionalLight(float lightIntensity)
+{
+    return sunlight_color.rgb * lightIntensity;
+}
+
+vec3 atmosGetDiffuseSunlightColor()
+{
+    return sunlight_color.rgb;
+}
+
+vec3 scaleDownLight(vec3 light)
+{
+    /* stub function for fallback compatibility on class1 hardware */
+    return light;
+}
+