1 files changed, 190 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/giF.glsl b/indra/newview/app_settings/shaders/class3/deferred/giF.glsl
new file mode 100644
index 0000000000..939710cb56
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+++ b/indra/newview/app_settings/shaders/class3/deferred/giF.glsl
@@ -0,0 +1,190 @@
+/** 
+ * @file giF.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+
+uniform sampler2DRect depthMap;
+uniform sampler2DRect normalMap;
+uniform sampler2DRect lightMap;
+uniform sampler2DRect specularRect;
+
+uniform sampler2D noiseMap;
+
+uniform sampler2D		diffuseGIMap;
+uniform sampler2D		specularGIMap;
+uniform sampler2D		normalGIMap;
+uniform sampler2D		depthGIMap;
+
+uniform sampler2D		lightFunc;
+
+// Inputs
+varying vec2 vary_fragcoord;
+
+uniform vec2 screen_res;
+
+uniform vec4 sunlight_color;
+
+uniform mat4 inv_proj;
+uniform mat4 gi_mat;  //gPipeline.mGIMatrix - eye space to sun space
+uniform mat4 gi_mat_proj; //gPipeline.mGIMatrixProj - eye space to projected sun space
+uniform mat4 gi_norm_mat; //gPipeline.mGINormalMatrix - eye space normal to sun space normal matrix
+uniform mat4 gi_inv_proj; //gPipeline.mGIInvProj - projected sun space to sun space
+uniform float gi_sample_width;
+uniform float gi_noise;
+uniform float gi_attenuation;
+uniform float gi_range;
+
+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;
+}
+
+vec4 getGIPosition(vec2 gi_tc)
+{
+	float depth = texture2D(depthGIMap, gi_tc).a;
+	vec2 sc = gi_tc*2.0;
+	sc -= vec2(1.0, 1.0);
+	vec4 ndc = vec4(sc.x, sc.y, 2.0*depth-1.0, 1.0);
+	vec4 pos = gi_inv_proj*ndc;
+	pos.xyz /= pos.w;
+	pos.w = 1.0;
+	return pos;
+}
+
+vec3 giAmbient(vec3 pos, vec3 norm)
+{
+	vec4 gi_c = gi_mat_proj * vec4(pos, 1.0);
+	gi_c.xyz /= gi_c.w;
+
+	vec4 gi_pos = gi_mat*vec4(pos,1.0);
+	vec3 gi_norm = (gi_norm_mat*vec4(norm,1.0)).xyz;
+	gi_norm = normalize(gi_norm);
+	
+	vec4 c_spec = texture2DRect(specularRect, vary_fragcoord.xy);
+	vec3 nz = texture2D(noiseMap, vary_fragcoord.xy/128.0).rgb;
+	gi_pos.xyz += nz.x*gi_noise*gi_norm.xyz;
+	vec2 tcx = gi_norm.xy;
+	vec2 tcy = gi_norm.yx;
+	
+	vec4 eye_pos = gi_mat*vec4(0,0,0,1.0);
+	
+	vec3 eye_dir = normalize(gi_pos.xyz-eye_pos.xyz);
+	vec3 eye_ref = reflect(eye_dir, gi_norm);
+	
+	float da = 0.0; //texture2DRect(lightMap, vary_fragcoord.xy).r*0.5;
+	vec3 fdiff = vec3(da);
+	float fda = da;
+	
+	vec3 rcol = vec3(0,0,0);
+	
+	float fsa = 0.0;
+	
+
+	for (int i = -1; i <= 1; i += 2 )
+	{
+		for (int j = -1; j <= 1; j+= 2)
+		{
+			vec2 tc = vec2(i, j)*0.75+gi_norm.xy*nz.z;
+			tc += nz.xy*2.0;
+			tc *= gi_sample_width*0.25;
+			tc += gi_c.xy;
+			
+			vec3 lnorm = -(texture2D(normalGIMap, tc.xy).xyz*2.0-1.0);
+			vec3 lpos = getGIPosition(tc.xy).xyz;
+							
+			vec3 at = lpos-gi_pos.xyz;
+			float dist = length(at);
+			float dist_atten = clamp(1.0/(gi_attenuation*dist), 0.0, 1.0);
+			
+						
+			if (dist_atten > 0.01)
+			{ //possible contribution of indirect light to this surface
+				vec3 ldir = at;
+				
+				float ld = -dot(ldir, lnorm);
+				
+				if (ld < 0.0)
+				{  					
+					float ang_atten = dot(ldir, gi_norm);
+				
+					if (ang_atten > 0.0)
+					{  
+						vec4 spec = texture2D(specularGIMap, tc.xy);
+						at = normalize(at);
+						vec3 diff;		
+						
+						float da = 0.0;
+												
+						//contribution from indirect source to visible pixel
+						vec3 ha = at;
+						ha.z -= 1.0;
+						ha = normalize(ha);
+						if (spec.a > 0.0)
+						{
+							float sa = dot(ha,lnorm);
+							da = texture2D(lightFunc, vec2(sa, spec.a)).a;
+						}
+						else
+						{
+							da = -lnorm.z;
+						}
+						
+						diff = texture2D(diffuseGIMap, tc.xy).rgb+spec.rgb*spec.a*2.0;
+												
+						if (da > 0.0)
+						{ //contribution from visible pixel to eye
+							vec3 ha = normalize(at-eye_dir);
+							if (c_spec.a > 0.0)
+							{
+								float sa = dot(ha, gi_norm);
+								da = dist_atten*texture2D(lightFunc, vec2(sa, c_spec.a)).a;
+							}
+							else
+							{
+								da = dist_atten*dot(gi_norm, normalize(ldir));
+							}
+							fda += da;
+							fdiff += da*(c_spec.rgb*c_spec.a*2.0+vec3(1,1,1))*diff.rgb;
+						}
+					}
+				}
+			}
+		}
+	}
+
+	fdiff *= sunlight_color.rgb;
+	
+	vec3 ret = fda*fdiff;
+	
+	return clamp(ret,vec3(0.0), vec3(1.0));
+}
+
+void main() 
+{
+	vec2 pos_screen = vary_fragcoord.xy;
+	vec4 pos = getPosition(pos_screen);
+	
+	float rad = gi_range*0.5;
+	
+	vec3 norm = texture2DRect(normalMap, pos_screen).xyz*2.0-1.0;
+	float dist = max(length(pos.xyz)-rad, 0.0);
+	
+	float da = clamp(1.0-dist/rad, 0.0, 1.0);
+	
+	vec3 ambient = da > 0.0 ? giAmbient(pos.xyz, norm) : vec3(0);
+	
+		
+	gl_FragData[0].xyz = mix(vec3(0), ambient, da);
+}