1 files changed, 28 insertions, 0 deletions

diff --git a/linden/indra/newview/app_settings/shaders/class1/effects/glowExtractF.glsl b/linden/indra/newview/app_settings/shaders/class1/effects/glowExtractF.glsl
new file mode 100644
index 0000000..dbdfe11
--- /dev/null
+++ b/linden/indra/newview/app_settings/shaders/class1/effects/glowExtractF.glsl
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+/** 
+ * @file glowExtractF.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+
+uniform sampler2DRect diffuseMap;
+uniform float minLuminance;
+uniform float maxExtractAlpha;
+uniform vec3 lumWeights;
+uniform vec3 warmthWeights;
+uniform float warmthAmount;
+
+void main()
+{
+        vec4 col = texture2DRect(diffuseMap, gl_TexCoord[0].xy);        
+
+        /// CALCULATING LUMINANCE (Using NTSC lum weights)
+        /// http://en.wikipedia.org/wiki/Luma_%28video%29
+        float lum = smoothstep(minLuminance, 1.0, dot(col.rgb, lumWeights ) );
+        float warmth = smoothstep(minLuminance, 1.0, max(col.r * warmthWeights.r, max(col.g * warmthWeights.g, col.b * warmthWeights.b)) ); 
+        
+        gl_FragColor.rgb = col.rgb; 
+        gl_FragColor.a = max(col.a, mix(lum, warmth, warmthAmount) * maxExtractAlpha);
+}