1 files changed, 41 insertions, 16 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index 258a9b7c40..3609cc054b 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
@@ -2,8 +2,28 @@
  * @file blurLightF.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
  * $/LicenseInfo$
  */
+ 
+
 
 #extension GL_ARB_texture_rectangle : enable
 
@@ -24,7 +44,7 @@ uniform vec2 screen_res;
 
 vec4 getPosition(vec2 pos_screen)
 {
-	float depth = texture2DRect(depthMap, pos_screen.xy).a;
+	float depth = texture2DRect(depthMap, pos_screen.xy).r;
 	vec2 sc = pos_screen.xy*2.0;
 	sc /= screen_res;
 	sc -= vec2(1.0,1.0);
@@ -37,44 +57,49 @@ vec4 getPosition(vec2 pos_screen)
 
 void main() 
 {
-	vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz;
+    vec2 tc = vary_fragcoord.xy;
+	vec3 norm = texture2DRect(normalMap, tc).xyz;
 	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
-	vec3 pos = getPosition(vary_fragcoord.xy).xyz;
-	vec4 ccol = texture2DRect(lightMap, vary_fragcoord.xy).rgba;
+	vec3 pos = getPosition(tc).xyz;
+	vec4 ccol = texture2DRect(lightMap, tc).rgba;
 	
 	vec2 dlt = kern_scale * delta / (1.0+norm.xy*norm.xy);
-	
 	dlt /= max(-pos.z*dist_factor, 1.0);
 	
 	vec2 defined_weight = kern[0].xy; // special case the first (centre) sample's weight in the blur; we have to sample it anyway so we get it for 'free'
 	vec4 col = defined_weight.xyxx * ccol;
-	
+
+	// relax tolerance according to distance to avoid speckling artifacts, as angles and distances are a lot more abrupt within a small screen area at larger distances
+	float pointplanedist_tolerance_pow2 = pos.z*pos.z*0.00005;
+
+	// perturb sampling origin slightly in screen-space to hide edge-ghosting artifacts where smoothing radius is quite large
+	tc += ( (mod(tc.x+tc.y,2) - 0.5) * kern[1].z * dlt * 0.5 );
+
 	for (int i = 1; i < 4; i++)
 	{
-		vec2 tc = vary_fragcoord.xy + kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
+		vec2 samptc = tc + kern[i].z*dlt;
+	        vec3 samppos = getPosition(samptc).xyz; 
 		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
+		if (d*d <= pointplanedist_tolerance_pow2)
 		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
+			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
 			defined_weight += kern[i].xy;
 		}
 	}
 	for (int i = 1; i < 4; i++)
 	{
-		vec2 tc = vary_fragcoord.xy - kern[i].z*dlt;
-	        vec3 samppos = getPosition(tc).xyz; 
+		vec2 samptc = tc - kern[i].z*dlt;
+	        vec3 samppos = getPosition(samptc).xyz; 
 		float d = dot(norm.xyz, samppos.xyz-pos.xyz);// dist from plane
-		if (d*d <= 0.003)
+		if (d*d <= pointplanedist_tolerance_pow2)
 		{
-			col += texture2DRect(lightMap, tc)*kern[i].xyxx;
+			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
 			defined_weight += kern[i].xy;
 		}
 	}
 
-
-
 	col /= defined_weight.xyxx;
+	col.y *= col.y;
 	
 	gl_FragColor = col;
 }