1 files changed, 247 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl
new file mode 100644
index 0000000000..aa5e99a2f7
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+++ b/indra/newview/app_settings/shaders/class3/deferred/sunLightF.glsl
@@ -0,0 +1,247 @@
+/** 
+ * @file sunLightF.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+
+/*[EXTRA_CODE_HERE]*/
+
+#ifdef DEFINE_GL_FRAGCOLOR
+out vec4 frag_color;
+#else
+#define frag_color gl_FragColor
+#endif
+
+//class 2, shadows, no SSAO
+
+uniform sampler2DRect depthMap;
+uniform sampler2DRect normalMap;
+uniform sampler2DShadow shadowMap0;
+uniform sampler2DShadow shadowMap1;
+uniform sampler2DShadow shadowMap2;
+uniform sampler2DShadow shadowMap3;
+uniform sampler2DShadow shadowMap4;
+uniform sampler2DShadow shadowMap5;
+
+
+// Inputs
+uniform mat4 shadow_matrix[6];
+uniform vec4 shadow_clip;
+uniform float ssao_radius;
+uniform float ssao_max_radius;
+uniform float ssao_factor;
+uniform float ssao_factor_inv;
+
+VARYING vec2 vary_fragcoord;
+
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+uniform vec2 proj_shadow_res;
+uniform vec3 sun_dir;
+
+uniform vec2 shadow_res;
+uniform float shadow_bias;
+uniform float shadow_offset;
+
+uniform float spot_shadow_bias;
+uniform float spot_shadow_offset;
+
+vec3 decode_normal (vec2 enc);
+
+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;
+}
+
+float pcfShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
+{
+	stc.xyz /= stc.w;
+	stc.z += shadow_bias;
+
+	stc.x = floor(stc.x*shadow_res.x + fract(pos_screen.y*0.666666666))/shadow_res.x; // add some jitter to X sample pos according to Y to disguise the snapping going on here
+	float cs = shadow2D(shadowMap, stc.xyz).x;
+
+	float shadow = cs;
+
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(2.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(1.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(-2.0/shadow_res.x, 1.5/shadow_res.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(-1.0/shadow_res.x, -1.5/shadow_res.y, 0.0)).x;
+
+			
+    return shadow*0.2;
+}
+
+float pcfSpotShadow(sampler2DShadow shadowMap, vec4 stc, float scl, vec2 pos_screen)
+{
+	stc.xyz /= stc.w;
+	stc.z += spot_shadow_bias*scl;
+	stc.x = floor(proj_shadow_res.x * stc.x + fract(pos_screen.y*0.666666666)) / proj_shadow_res.x; // snap
+
+	float cs = shadow2D(shadowMap, stc.xyz).x;
+	float shadow = cs;
+
+	vec2 off = 1.0/proj_shadow_res;
+	off.y *= 1.5;
+	
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x*2.0, off.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(off.x, -off.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x, off.y, 0.0)).x;
+	shadow += shadow2D(shadowMap, stc.xyz+vec3(-off.x*2.0, -off.y, 0.0)).x;
+
+        return shadow*0.2;
+}
+
+void main() 
+{
+	vec2 pos_screen = vary_fragcoord.xy;
+	
+	//try doing an unproject here
+	
+	vec4 pos = getPosition(pos_screen);
+	
+	vec3 norm = texture2DRect(normalMap, pos_screen).xyz;
+	norm = decode_normal(norm.xy); // unpack norm
+		
+	/*if (pos.z == 0.0) // do nothing for sky *FIX: REMOVE THIS IF/WHEN THE POSITION MAP IS BEING USED AS A STENCIL
+	{
+		frag_color = vec4(0.0); // doesn't matter
+		return;
+	}*/
+	
+	float shadow = 0.0;
+	float dp_directional_light = max(0.0, dot(norm, sun_dir.xyz));
+	
+	vec3 shadow_pos = pos.xyz;
+	vec3 offset = sun_dir.xyz * (1.0-dp_directional_light);
+	
+	vec4 spos = vec4(shadow_pos+offset*shadow_offset, 1.0);
+	
+	if (spos.z > -shadow_clip.w)
+	{	
+		if (dp_directional_light == 0.0)
+		{
+			// if we know this point is facing away from the sun then we know it's in shadow without having to do a squirrelly shadow-map lookup
+			shadow = 0.0;
+		}
+		else
+		{
+			vec4 lpos;
+			
+			vec4 near_split = shadow_clip*-0.75;
+			vec4 far_split = shadow_clip*-1.25;
+			vec4 transition_domain = near_split-far_split;
+			float weight = 0.0;
+
+			if (spos.z < near_split.z)
+			{
+				lpos = shadow_matrix[3]*spos;
+				
+				float w = 1.0;
+				w -= max(spos.z-far_split.z, 0.0)/transition_domain.z;
+				shadow += pcfShadow(shadowMap3, lpos, 0.25, pos_screen)*w;
+				weight += w;
+				shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
+			}
+
+			if (spos.z < near_split.y && spos.z > far_split.z)
+			{
+				lpos = shadow_matrix[2]*spos;
+				
+				float w = 1.0;
+				w -= max(spos.z-far_split.y, 0.0)/transition_domain.y;
+				w -= max(near_split.z-spos.z, 0.0)/transition_domain.z;
+				shadow += pcfShadow(shadowMap2, lpos, 0.5, pos_screen)*w;
+				weight += w;
+			}
+
+			if (spos.z < near_split.x && spos.z > far_split.y)
+			{
+				lpos = shadow_matrix[1]*spos;
+
+				float w = 1.0;
+				w -= max(spos.z-far_split.x, 0.0)/transition_domain.x;
+				w -= max(near_split.y-spos.z, 0.0)/transition_domain.y;
+				shadow += pcfShadow(shadowMap1, lpos, 0.75, pos_screen)*w;
+				weight += w;
+			}
+
+			if (spos.z > far_split.x)
+			{
+				lpos = shadow_matrix[0]*spos;
+				
+				float w = 1.0;
+				w -= max(near_split.x-spos.z, 0.0)/transition_domain.x;
+				
+				shadow += pcfShadow(shadowMap0, lpos, 1.0, pos_screen)*w;
+				weight += w;
+			}
+		
+
+			shadow /= weight;
+
+			// take the most-shadowed value out of these two:
+			//  * the blurred sun shadow in the light (shadow) map
+			//  * an unblurred dot product between the sun and this norm
+			// the goal is to err on the side of most-shadow to fill-in shadow holes and reduce artifacting
+			shadow = min(shadow, dp_directional_light);
+			
+			//lpos.xy /= lpos.w*32.0;
+			//if (fract(lpos.x) < 0.1 || fract(lpos.y) < 0.1)
+			//{
+			//	shadow = 0.0;
+			//}
+			
+		}
+	}
+	else
+	{
+		// more distant than the shadow map covers
+		shadow = 1.0;
+	}
+	
+	frag_color[0] = shadow;
+	frag_color[1] = 1.0;
+	
+	spos = vec4(shadow_pos+norm*spot_shadow_offset, 1.0);
+	
+	//spotlight shadow 1
+	vec4 lpos = shadow_matrix[4]*spos;
+	frag_color[2] = pcfSpotShadow(shadowMap4, lpos, 0.8, pos_screen); 
+	
+	//spotlight shadow 2
+	lpos = shadow_matrix[5]*spos;
+	frag_color[3] = pcfSpotShadow(shadowMap5, lpos, 0.8, pos_screen); 
+
+	//frag_color.rgb = pos.xyz;
+	//frag_color.b = shadow;
+}