From ca4eab69b9b1ed42f3128635ef1f278600b59118 Mon Sep 17 00:00:00 2001
From: Dave Parks <davep@lindenlab.com>
Date: Thu, 8 Dec 2011 17:49:56 -0600
Subject: SH-2680 Bring back blurred edges on objects closer than the near
 focal plane.

---
 .../app_settings/shaders/class1/deferred/cofF.glsl |  7 ++--
 .../shaders/class1/deferred/dofCombineF.glsl       |  2 +-
 .../shaders/class1/deferred/postDeferredF.glsl     | 40 +++++++++++++++++++---
 3 files changed, 41 insertions(+), 8 deletions(-)

(limited to 'indra/newview/app_settings')

diff --git a/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl b/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
index 88fe3c3dee..e612efba61 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/cofF.glsl
@@ -57,7 +57,7 @@ float getDepth(vec2 pos_screen)
 
 float calc_cof(float depth)
 {
-	float sc = abs(depth-focal_distance)/-depth*blur_constant;
+	float sc = (depth-focal_distance)/-depth*blur_constant;
 		
 	sc /= magnification;
 	
@@ -79,9 +79,10 @@ void main()
 	vec4 diff = texture2DRect(diffuseRect, vary_fragcoord.xy);
 	
 	float sc = calc_cof(depth);
-	sc = min(abs(sc), max_cof);
+	sc = min(sc, max_cof);
+	sc = max(sc, -max_cof);
 	
 	vec4 bloom = texture2D(bloomMap, vary_fragcoord.xy/screen_res);
 	gl_FragColor.rgb = diff.rgb + bloom.rgb;
-	gl_FragColor.a = sc/max_cof;
+	gl_FragColor.a = sc/max_cof*0.5+0.5;
 }
diff --git a/indra/newview/app_settings/shaders/class1/deferred/dofCombineF.glsl b/indra/newview/app_settings/shaders/class1/deferred/dofCombineF.glsl
index 21453aefaa..01e3505359 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/dofCombineF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/dofCombineF.glsl
@@ -48,7 +48,7 @@ void main()
 	
 	vec4 diff = texture2DRect(lightMap, vary_fragcoord.xy);
 
-	float a = min(diff.a * max_cof*res_scale*res_scale, 1.0);
+	float a = min(abs(diff.a*2.0-1.0) * max_cof*res_scale*res_scale, 1.0);
 
 	if (a > 0.25 && a < 0.75)
 	{ //help out the transition a bit
diff --git a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
index 4603d99c5e..18d451bf87 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/postDeferredF.glsl
@@ -42,7 +42,7 @@ void dofSample(inout vec4 diff, inout float w, float min_sc, vec2 tc)
 {
 	vec4 s = texture2DRect(diffuseRect, tc);
 
-	float sc = s.a*max_cof;
+	float sc = abs(s.a*2.0-1.0)*max_cof;
 
 	if (sc > min_sc) //sampled pixel is more "out of focus" than current sample radius
 	{
@@ -57,6 +57,20 @@ void dofSample(inout vec4 diff, inout float w, float min_sc, vec2 tc)
 	}
 }
 
+void dofSampleNear(inout vec4 diff, inout float w, float min_sc, vec2 tc)
+{
+	vec4 s = texture2DRect(diffuseRect, tc);
+
+	float wg = 0.25;
+
+	// de-weight dull areas to make highlights 'pop'
+	wg += s.r+s.g+s.b;
+
+	diff += wg*s;
+		
+	w += wg;
+}
+
 void main() 
 {
 	vec2 tc = vary_fragcoord.xy;
@@ -66,12 +80,30 @@ void main()
 	{ 
 		float w = 1.0;
 		
-		float sc = diff.a*max_cof;
-				
+		float sc = (diff.a*2.0-1.0)*max_cof;
+			
 		float PI = 3.14159265358979323846264;
 
 		// sample quite uniformly spaced points within a circle, for a circular 'bokeh'		
+		if (sc > 0.5)
+		{
+			while (sc > 0.5)
+			{
+				int its = int(max(1.0,(sc*3.7)));
+				for (int i=0; i<its; ++i)
+				{
+					float ang = sc+i*2*PI/its; // sc is added for rotary perturbance
+					float samp_x = sc*sin(ang);
+					float samp_y = sc*cos(ang);
+					// you could test sample coords against an interesting non-circular aperture shape here, if desired.
+					dofSampleNear(diff, w, sc, vary_fragcoord.xy + vec2(samp_x,samp_y));
+				}
+				sc -= 1.0;
+			}
+		}
+		else if (sc < -0.5)
 		{
+			sc = abs(sc);
 			while (sc > 0.5)
 			{
 				int its = int(max(1.0,(sc*3.7)));
@@ -86,7 +118,7 @@ void main()
 				sc -= 1.0;
 			}
 		}
-		
+
 		diff /= w;
 	}
 		
-- 
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