De-duplicate deferred gbuffer access for getPosition/getNorm.

De-duplicate ambient occlusion shader code and move to new aoUtil.glsl

Split shared shadow tap funcs into shadowUtil.glsl

1 files changed, 56 insertions, 69 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
index b56abb66d1..868eec3926 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/blurLightF.glsl
@@ -48,82 +48,69 @@ VARYING vec2 vary_fragcoord;
 uniform mat4 inv_proj;
 uniform vec2 screen_res;
 
-vec4 getPosition(vec2 pos_screen)
-{
-	float depth = texture2DRect(depthMap, pos_screen.xy).r;
-	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;
-}
-
+vec4 getPosition(vec2 pos_screen);
+vec3 getNorm(vec2 pos_screen);
 vec3 decode_normal (vec2 enc);
 
 void main() 
 {
     vec2 tc = vary_fragcoord.xy;
-	vec3 norm = texture2DRect(normalMap, tc).xyz;
-	norm = decode_normal(norm.xy); // unpack norm
-
-	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
-	float tc_mod = 0.5*(tc.x + tc.y); // mod(tc.x+tc.y,2)
-	tc_mod -= floor(tc_mod);
-	tc_mod *= 2.0;
-	tc += ( (tc_mod - 0.5) * kern[1].z * dlt * 0.5 );
-
-	for (int i = 1; i < 4; i++)
-	{
-		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 <= pointplanedist_tolerance_pow2)
-		{
-			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-
-	for (int i = 1; i < 4; i++)
-	{
-		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 <= pointplanedist_tolerance_pow2)
-		{
-			col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
-			defined_weight += kern[i].xy;
-		}
-	}
-
-	col /= defined_weight.xyxx;
-	col.y *= col.y;
-	
-	frag_color = col;
+    vec3 norm = getNorm(tc);
+    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
+    float tc_mod = 0.5*(tc.x + tc.y); // mod(tc.x+tc.y,2)
+    tc_mod -= floor(tc_mod);
+    tc_mod *= 2.0;
+    tc += ( (tc_mod - 0.5) * kern[1].z * dlt * 0.5 );
+
+    for (int i = 1; i < 4; i++)
+    {
+        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 <= pointplanedist_tolerance_pow2)
+        {
+            col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
+            defined_weight += kern[i].xy;
+        }
+    }
+
+    for (int i = 1; i < 4; i++)
+    {
+        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 <= pointplanedist_tolerance_pow2)
+        {
+            col += texture2DRect(lightMap, samptc)*kern[i].xyxx;
+            defined_weight += kern[i].xy;
+        }
+    }
+
+    col /= defined_weight.xyxx;
+    col.y *= col.y;
+    
+    frag_color = col;
 
 #ifdef IS_AMD_CARD
-	// If it's AMD make sure the GLSL compiler sees the arrays referenced once by static index. Otherwise it seems to optimise the storage awawy which leads to unfun crashes and artifacts.
-	vec3 dummy1 = kern[0];
-	vec3 dummy2 = kern[3];
+    // If it's AMD make sure the GLSL compiler sees the arrays referenced once by static index. Otherwise it seems to optimise the storage awawy which leads to unfun crashes and artifacts.
+    vec3 dummy1 = kern[0];
+    vec3 dummy2 = kern[3];
 #endif
 }