1 files changed, 207 insertions, 49 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
index 28bcd720c0..c08e9d361a 100644..100755
--- a/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/multiSpotLightF.glsl
@@ -1,14 +1,38 @@
 /** 
  * @file multiSpotLightF.glsl
  *
- * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
- * $License$
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
  */
 
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
 
-#version 120
+//class 1 -- no shadows
 
 #extension GL_ARB_texture_rectangle : enable
+#extension GL_ARB_shader_texture_lod : enable
 
 uniform sampler2DRect diffuseRect;
 uniform sampler2DRect specularRect;
@@ -16,8 +40,8 @@ uniform sampler2DRect depthMap;
 uniform sampler2DRect normalMap;
 uniform samplerCube environmentMap;
 uniform sampler2D noiseMap;
-uniform sampler2D lightFunc;
 uniform sampler2D projectionMap;
+uniform sampler2D lightFunc;
 
 uniform mat4 proj_mat; //screen space to light space
 uniform float proj_near; //near clip for projection
@@ -26,6 +50,7 @@ uniform vec3 proj_n;
 uniform float proj_focus; //distance from plane to begin blurring
 uniform float proj_lod;  //(number of mips in proj map)
 uniform float proj_range; //range between near clip and far clip plane of projection
+uniform float proj_ambient_lod;
 uniform float proj_ambiance;
 uniform float near_clip;
 uniform float far_clip;
@@ -33,16 +58,126 @@ uniform float far_clip;
 uniform vec3 proj_origin; //origin of projection to be used for angular attenuation
 uniform float sun_wash;
 
-varying vec4 vary_light;
+uniform vec3 center;
+uniform vec3 color;
+uniform float falloff;
+uniform float size;
 
-varying vec4 vary_fragcoord;
+VARYING vec4 vary_fragcoord;
 uniform vec2 screen_res;
 
 uniform mat4 inv_proj;
 
+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;
+}
+vec3 srgb_to_linear(vec3 cs)
+{
+	vec3 low_range = cs / vec3(12.92);
+	vec3 high_range = pow((cs+vec3(0.055))/vec3(1.055), vec3(2.4));
+	bvec3 lte = lessThanEqual(cs,vec3(0.04045));
+
+#ifdef OLD_SELECT
+	vec3 result;
+	result.r = lte.r ? low_range.r : high_range.r;
+	result.g = lte.g ? low_range.g : high_range.g;
+	result.b = lte.b ? low_range.b : high_range.b;
+    return result;
+#else
+	return mix(high_range, low_range, lte);
+#endif
+
+}
+
+vec3 linear_to_srgb(vec3 cl)
+{
+	cl = clamp(cl, vec3(0), vec3(1));
+	vec3 low_range  = cl * 12.92;
+	vec3 high_range = 1.055 * pow(cl, vec3(0.41666)) - 0.055;
+	bvec3 lt = lessThan(cl,vec3(0.0031308));
+
+#ifdef OLD_SELECT
+	vec3 result;
+	result.r = lt.r ? low_range.r : high_range.r;
+	result.g = lt.g ? low_range.g : high_range.g;
+	result.b = lt.b ? low_range.b : high_range.b;
+    return result;
+#else
+	return mix(high_range, low_range, lt);
+#endif
+
+}
+
+
+vec4 texture2DLodSpecular(sampler2D projectionMap, vec2 tc, float lod)
+{
+	vec4 ret = texture2DLod(projectionMap, tc, lod);
+	ret.rgb = srgb_to_linear(ret.rgb);
+	
+	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
+	
+	float det = min(lod/(proj_lod*0.5), 1.0);
+	
+	float d = min(dist.x, dist.y);
+    
+    d *= min(1, d * (proj_lod - lod));
+	
+	float edge = 0.25*det;
+    
+	ret *= clamp(d/edge, 0.0, 1.0);
+	
+	return ret;
+}
+
+vec4 texture2DLodDiffuse(sampler2D projectionMap, vec2 tc, float lod)
+{
+	vec4 ret = texture2DLod(projectionMap, tc, lod);
+	ret.rgb = srgb_to_linear(ret.rgb);
+	
+	vec2 dist = vec2(0.5) - abs(tc-vec2(0.5));
+	
+	float det = min(lod/(proj_lod*0.5), 1.0);
+	
+	float d = min(dist.x, dist.y);
+	
+	float edge = 0.25*det;
+		
+	ret *= clamp(d/edge, 0.0, 1.0);
+	
+	return ret;
+}
+
+vec4 texture2DLodAmbient(sampler2D projectionMap, vec2 tc, float lod)
+{
+	vec4 ret = texture2DLod(projectionMap, tc, lod);
+	ret.rgb = srgb_to_linear(ret.rgb);
+	
+	vec2 dist = tc-vec2(0.5);
+	
+	float d = dot(dist,dist);
+		
+	ret *= min(clamp((0.25-d)/0.25, 0.0, 1.0), 1.0);
+	
+	return ret;
+}
+
+
 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);
@@ -61,15 +196,18 @@ void main()
 	frag.xy *= screen_res;
 	
 	vec3 pos = getPosition(frag.xy).xyz;
-	vec3 lv = vary_light.xyz-pos.xyz;
-	float dist2 = dot(lv,lv);
-	dist2 /= vary_light.w;
-	if (dist2 > 1.0)
+	vec3 lv = center.xyz-pos.xyz;
+	float dist = length(lv);
+	dist /= size;
+	if (dist > 1.0)
 	{
 		discard;
 	}
-	
-	vec3 norm = texture2DRect(normalMap, frag.xy).xyz*2.0-1.0;
+		
+	vec3 norm = texture2DRect(normalMap, frag.xy).xyz;
+	float envIntensity = norm.z;
+
+	norm = decode_normal(norm.xy);
 	
 	norm = normalize(norm);
 	float l_dist = -dot(lv, proj_n);
@@ -82,8 +220,15 @@ void main()
 	
 	proj_tc.xyz /= proj_tc.w;
 	
-	float fa = gl_Color.a+1.0;
-	float dist_atten = clamp(1.0-(dist2-1.0*(1.0-fa))/fa, 0.0, 1.0);
+	float fa = falloff+1.0;
+	float dist_atten = min(1.0-(dist-1.0*(1.0-fa))/fa, 1.0);
+	dist_atten *= dist_atten;
+	dist_atten *= 2.0;
+
+	if (dist_atten <= 0.0)
+	{
+		discard;
+	}
 	
 	lv = proj_origin-pos.xyz;
 	lv = normalize(lv);
@@ -92,7 +237,8 @@ void main()
 	vec3 col = vec3(0,0,0);
 		
 	vec3 diff_tex = texture2DRect(diffuseRect, frag.xy).rgb;
-		
+	vec3 dlit = vec3(0, 0, 0);
+	
 	float noise = texture2D(noiseMap, frag.xy/128.0).b;
 	if (proj_tc.z > 0.0 &&
 		proj_tc.x < 1.0 &&
@@ -101,39 +247,63 @@ void main()
 		proj_tc.y > 0.0)
 	{
 		float lit = 0.0;
+		float amb_da = proj_ambiance;
+		
 		if (da > 0.0)
 		{
 			float diff = clamp((l_dist-proj_focus)/proj_range, 0.0, 1.0);
 			float lod = diff * proj_lod;
 			
-			vec4 plcol = texture2DLod(projectionMap, proj_tc.xy, lod);
+			vec4 plcol = texture2DLodDiffuse(projectionMap, proj_tc.xy, lod);
 		
-			vec3 lcol = gl_Color.rgb * plcol.rgb * plcol.a;
+			dlit = color.rgb * plcol.rgb * plcol.a;
 			
 			lit = da * dist_atten * noise;
 			
-			col = lcol*lit*diff_tex;
+			col = dlit*lit*diff_tex;
+			amb_da += (da*0.5)*proj_ambiance;
 		}
-		
-		float diff = clamp((proj_range-proj_focus)/proj_range, 0.0, 1.0);
-		float lod = diff * proj_lod;
-		vec4 amb_plcol = texture2DLod(projectionMap, proj_tc.xy, lod);
-		//float amb_da = mix(proj_ambiance, proj_ambiance*max(-da, 0.0), max(da, 0.0));
-		float amb_da = proj_ambiance;
-		
+		//float diff = clamp((proj_range-proj_focus)/proj_range, 0.0, 1.0);
+		vec4 amb_plcol = texture2DLodAmbient(projectionMap, proj_tc.xy, proj_lod);
+							
 		amb_da += (da*da*0.5+0.5)*proj_ambiance;
-			
+				
 		amb_da *= dist_atten * noise;
-		
+			
 		amb_da = min(amb_da, 1.0-lit);
-		
-		col += amb_da*gl_Color.rgb*diff_tex.rgb*amb_plcol.rgb*amb_plcol.a;
+		col += amb_da*color.rgb*diff_tex*amb_plcol.rgb*amb_plcol.a;
 	}
 	
 	
 	vec4 spec = texture2DRect(specularRect, frag.xy);
+	
 	if (spec.a > 0.0)
 	{
+		dlit *= min(da*6.0, 1.0) * dist_atten;
+
+		vec3 npos = -normalize(pos);
+
+		//vec3 ref = dot(pos+lv, norm);
+		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 += dlit*scol*spec.rgb;
+			//col += spec.rgb;
+		}
+	}	
+
+	if (envIntensity > 0.0)
+	{
 		vec3 ref = reflect(normalize(pos), norm);
 		
 		//project from point pos in direction ref to plane proj_p, proj_n
@@ -144,35 +314,23 @@ void main()
 		{
 			vec3 pfinal = pos + ref * dot(pdelta, proj_n)/ds;
 			
-			vec3 stc = (proj_mat * vec4(pfinal.xyz, 1.0)).xyz;
-
+			vec4 stc = (proj_mat * vec4(pfinal.xyz, 1.0));
+            
 			if (stc.z > 0.0)
 			{
-				stc.xy /= stc.z+proj_near;
-					
+                stc /= stc.w;
+								
 				if (stc.x < 1.0 &&
 					stc.y < 1.0 &&
 					stc.x > 0.0 &&
 					stc.y > 0.0)
 				{
-					vec4 scol = texture2DLod(projectionMap, stc.xy, proj_lod-spec.a*proj_lod);
-					col += dist_atten*scol.rgb*gl_Color.rgb*scol.a*spec.rgb;
+					col += color.rgb * texture2DLodSpecular(projectionMap, stc.xy, (1 - spec.a) * (proj_lod * 0.6)).rgb * envIntensity;
 				}
 			}
 		}
 	}
 	
-	/*if (spec.a > 0.0)
-	{
-		//vec3 ref = reflect(normalize(pos), norm);
-		float sa = dot(normalize(lv-normalize(pos)),norm);;
-		//sa = max(sa, 0.0);
-		//sa = pow(sa, 128.0 * spec.a*spec.a/dist_atten)*min(dist_atten*4.0, 1.0);
-		sa = texture2D(lightFunc, vec2(sa, spec.a)).a * min(dist_atten*4.0, 1.0);
-		sa *= noise;
-		col += da*sa*lcol*spec.rgb;
-	}*/
-	
-	gl_FragColor.rgb = col;	
-	gl_FragColor.a = 0.0;
+	frag_color.rgb = col;	
+	frag_color.a = 0.0;
 }