1 files changed, 68 insertions, 96 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
index aba4a01754..f8264d971c 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/pointLightF.glsl
@@ -56,103 +56,75 @@ uniform vec2 screen_res;
 uniform mat4 inv_proj;
 uniform vec4 viewport;
 
-vec2 encode_normal(vec3 n)
-{
-	float f = sqrt(8 * n.z + 8);
-	return n.xy / f + 0.5;
-}
-
-vec3 decode_normal (vec2 enc)
-{
-    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;
-}
-
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	vec2 sc = (pos_screen.xy-viewport.xy)*2.0;
-	sc /= viewport.zw;
-	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;
-}
+vec3 getNorm(vec2 pos_screen);
+vec4 getPosition(vec2 pos_screen);
 
 void main() 
 {
-	vec4 frag = vary_fragcoord;
-	frag.xyz /= frag.w;
-	frag.xyz = frag.xyz*0.5+0.5;
-	frag.xy *= screen_res;
-	
-	vec3 pos = getPosition(frag.xy).xyz;
-	vec3 lv = trans_center.xyz-pos;
-	float dist = length(lv);
-	dist /= size;
-	if (dist > 1.0)
-	{
-		discard;
-	}
-	
-	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
-	float da = dot(norm, lv);
-	if (da < 0.0)
-	{
-		discard;
-	}
-	
-	norm = normalize(norm);
-	lv = normalize(lv);
-	da = dot(norm, lv);
-	
-	float noise = texture2D(noiseMap, frag.xy/128.0).b;
-	
-	vec3 col = texture2DRect(diffuseRect, frag.xy).rgb;
-	float fa = falloff+1.0;
-	float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
-	dist_atten *= dist_atten;
-	dist_atten *= 2.0;
-	
-	float lit = da * dist_atten * noise;
-
-	col = color.rgb*lit*col;
-
-	vec4 spec = texture2DRect(specularRect, frag.xy);
-	if (spec.a > 0.0)
-	{
-		lit = min(da*6.0, 1.0) * dist_atten;
-
-		vec3 npos = -normalize(pos);
-		vec3 h = normalize(lv+npos);
-		float nh = dot(norm, h);
-		float nv = dot(norm, npos);
-		float vh = dot(npos, h);
-		float sa = nh;
-		float fres = pow(1 - dot(h, npos), 5) * 0.4+0.5;
-		float gtdenom = 2 * nh;
-		float gt = max(0,(min(gtdenom * nv / vh, gtdenom * da / vh)));
-
-		if (nh > 0.0)
-		{
-			float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
-			col += lit*scol*color.rgb*spec.rgb;
-		}
-	}
-	
-	if (dot(col, col) <= 0.0)
-	{
-		discard;
-	}
-		
-	frag_color.rgb = col;	
-	frag_color.a = 0.0;
+    vec4 frag = vary_fragcoord;
+    frag.xyz /= frag.w;
+    frag.xyz = frag.xyz*0.5+0.5;
+    frag.xy *= screen_res;
+    
+    vec3 pos = getPosition(frag.xy).xyz;
+    vec3 lv = trans_center.xyz-pos;
+    float dist = length(lv);
+    dist /= size;
+    if (dist > 1.0)
+    {
+        discard;
+    }
+    
+    vec3 norm = getNorm(frag.xy);
+
+    float da = dot(norm, lv);
+    if (da < 0.0)
+    {
+        discard;
+    }
+    
+    lv = normalize(lv);
+    da = dot(norm, lv);
+    
+    float noise = texture2D(noiseMap, frag.xy/128.0).b;
+    
+    vec3 col = texture2DRect(diffuseRect, frag.xy).rgb;
+    float fa = falloff+1.0;
+    float dist_atten = clamp(1.0-(dist-1.0*(1.0-fa))/fa, 0.0, 1.0);
+    dist_atten *= dist_atten;
+    dist_atten *= 2.0;
+    
+    float lit = da * dist_atten * noise;
+
+    col = color.rgb*lit*col;
+
+    vec4 spec = texture2DRect(specularRect, frag.xy);
+    if (spec.a > 0.0)
+    {
+        lit = min(da*6.0, 1.0) * dist_atten;
+
+        vec3 npos = -normalize(pos);
+        vec3 h = normalize(lv+npos);
+        float nh = dot(norm, h);
+        float nv = dot(norm, npos);
+        float vh = dot(npos, h);
+        float sa = nh;
+        float fres = pow(1 - dot(h, npos), 5) * 0.4+0.5;
+        float gtdenom = 2 * nh;
+        float gt = max(0,(min(gtdenom * nv / vh, gtdenom * da / vh)));
+
+        if (nh > 0.0)
+        {
+            float scol = fres*texture2D(lightFunc, vec2(nh, spec.a)).r*gt/(nh*da);
+            col += lit*scol*color.rgb*spec.rgb;
+        }
+    }
+    
+    if (dot(col, col) <= 0.0)
+    {
+        discard;
+    }
+        
+    frag_color.rgb = col;   
+    frag_color.a = 0.0;
 }