1 files changed, 84 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/giDownsampleF.glsl b/indra/newview/app_settings/shaders/class3/deferred/giDownsampleF.glsl
new file mode 100644
index 0000000000..7325825d6d
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class3/deferred/giDownsampleF.glsl
@@ -0,0 +1,84 @@
+/** 
+ * @file giDownsampleF.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+uniform sampler2DRect giLightMap;
+
+uniform vec2 kern[32];
+uniform float dist_factor;
+uniform float blur_size;
+uniform vec2 delta;
+uniform int kern_length;
+uniform float kern_scale;
+uniform vec3 blur_quad;
+
+varying vec2 vary_fragcoord;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+vec4 getPosition(vec2 pos_screen)
+{
+	float depth = texture2DRect(depthMap, pos_screen.xy).a;
+	vec2 sc = pos_screen.xy*2.0;
+	sc /= screen_res;
+	sc -= vec2(1.0,1.0);
+	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;
+}
+
+float getDepth(vec2 pos_screen)
+{
+	float z = texture2DRect(depthMap, pos_screen.xy).a;
+	z = z*2.0-1.0;
+	vec4 ndc = vec4(0.0, 0.0, z, 1.0);
+	vec4 p = inv_proj*ndc;
+	return p.z/p.w;
+}
+
+void main() 
+{
+	vec3 norm = texture2DRect(normalMap, vary_fragcoord.xy).xyz*2.0-1.0;
+	float depth = getDepth(vary_fragcoord.xy);
+		
+	vec3 ccol = texture2DRect(giLightMap, vary_fragcoord.xy).rgb;
+	vec2 dlt = kern_scale * delta/(vec2(1.0,1.0)+norm.xy*norm.xy);
+	dlt /= clamp(-depth*blur_quad.x, 1.0, 3.0);
+	float defined_weight = kern[0].x;
+	vec3 col = ccol*kern[0].x;
+	
+	for (int i = 0; i < kern_length; i++)
+	{
+		vec2 tc = vary_fragcoord.xy + kern[i].y*dlt;
+	    vec3 sampNorm = texture2DRect(normalMap, tc.xy).xyz*2.0-1.0;
+	    
+	   float d = dot(norm.xyz, sampNorm);
+		
+		if (d > 0.5)
+		{
+			float sampdepth = getDepth(tc.xy);
+			sampdepth -= depth;
+			if (sampdepth*sampdepth < blur_quad.z)
+			{
+	    		col += texture2DRect(giLightMap, tc).rgb*kern[i].x;
+				defined_weight += kern[i].x;
+			}
+		}
+	}
+
+	col /= defined_weight;
+	
+	//col = ccol;
+	
+	col = col*blur_quad.y;
+	
+	gl_FragData[0].xyz = col;
+	
+	//gl_FragColor = ccol;
+}