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diff --git a/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
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+++ b/indra/newview/app_settings/shaders/class1/deferred/deferredUtil.glsl
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+/** 
+ * @file class1/deferred/deferredUtil.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2007, 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 sampler2DRect   normalMap;
+uniform sampler2DRect   depthMap;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+vec2 getScreenCoordinate(vec2 screenpos)
+{
+    vec2 sc = screenpos.xy * 2.0;
+    if (screen_res.x > 0 && screen_res.y > 0)
+    {
+       sc /= screen_res;
+    }
+    return sc - vec2(1.0, 1.0);
+}
+
+vec3 getNorm(vec2 screenpos)
+{
+   vec2 enc = texture2DRect(normalMap, screenpos.xy).xy;
+   vec2 fenc = enc*4-2;
+   float f = dot(fenc,fenc);
+   float g = sqrt(1-f/4);
+   vec3 n;
+   n.xy = fenc*g;
+   n.z = 1-f/2;
+   return n;
+}
+
+float getDepth(vec2 pos_screen)
+{
+    float depth = texture2DRect(depthMap, pos_screen).r;
+    return depth;
+}
+
+vec4 getPosition(vec2 pos_screen)
+{
+    float depth = getDepth(pos_screen);
+    vec2 sc = getScreenCoordinate(pos_screen);
+    vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+    vec4 pos = inv_proj * ndc;
+    pos /= pos.w;
+    pos.w = 1.0;
+    return pos;
+}
+
+vec4 getPositionWithDepth(vec2 pos_screen, float depth)
+{
+    vec2 sc = getScreenCoordinate(pos_screen);
+    vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+    vec4 pos = inv_proj * ndc;
+    pos /= pos.w;
+    pos.w = 1.0;
+    return pos;
+}