1 files changed, 22 insertions, 0 deletions

diff --git a/linden/indra/newview/app_settings/shaders/class3/effects/extractF.glsl b/linden/indra/newview/app_settings/shaders/class3/effects/extractF.glsl
new file mode 100644
index 0000000..a1583b1
--- /dev/null
+++ b/linden/indra/newview/app_settings/shaders/class3/effects/extractF.glsl
@@ -0,0 +1,22 @@
+/**
+ * @file extractF.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+uniform sampler2DRect RenderTexture;
+uniform float extractLow;
+uniform float extractHigh;
+uniform vec3 lumWeights;
+
+void main(void) 
+{
+        /// Get scene color
+        vec3 color = vec3(texture2DRect(RenderTexture, gl_TexCoord[0].st));
+        
+        /// Extract luminance and scale up by night vision brightness
+        float lum = smoothstep(extractLow, extractHigh, dot(color, lumWeights));
+
+        gl_FragColor = vec4(vec3(lum), 1.0);
+}