1 files changed, 356 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
new file mode 100644
index 0000000000..a2db247331
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class3/deferred/softenLightF.glsl
@@ -0,0 +1,356 @@
+/** 
+ * @file softenLightF.glsl
+ *
+ * $LicenseInfo:firstyear=2007&license=viewerlgpl$
+ * $/LicenseInfo$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+
+uniform sampler2DRect diffuseRect;
+uniform sampler2DRect specularRect;
+uniform sampler2DRect normalMap;
+uniform sampler2DRect lightMap;
+uniform sampler2D	  noiseMap;
+uniform samplerCube environmentMap;
+uniform sampler2D	  lightFunc;
+uniform vec3 gi_quad;
+
+uniform float blur_size;
+uniform float blur_fidelity;
+
+// Inputs
+uniform vec4 morphFactor;
+uniform vec3 camPosLocal;
+//uniform vec4 camPosWorld;
+uniform vec4 gamma;
+uniform vec4 lightnorm;
+uniform vec4 sunlight_color;
+uniform vec4 ambient;
+uniform vec4 blue_horizon;
+uniform vec4 blue_density;
+uniform vec4 haze_horizon;
+uniform vec4 haze_density;
+uniform vec4 cloud_shadow;
+uniform vec4 density_multiplier;
+uniform vec4 distance_multiplier;
+uniform vec4 max_y;
+uniform vec4 glow;
+uniform float scene_light_strength;
+uniform vec3 env_mat[3];
+uniform vec4 shadow_clip;
+uniform mat3 ssao_effect_mat;
+
+uniform sampler2DRect depthMap;
+uniform mat4 inv_proj;
+uniform vec2 screen_res;
+
+varying vec4 vary_light;
+varying vec2 vary_fragcoord;
+
+vec3 vary_PositionEye;
+
+vec3 vary_SunlitColor;
+vec3 vary_AmblitColor;
+vec3 vary_AdditiveColor;
+vec3 vary_AtmosAttenuation;
+uniform float gi_ambiance;
+
+vec4 getPosition_d(vec2 pos_screen, float depth)
+{
+	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)
+{ //get position in screen space (world units) given window coordinate and depth map
+	float depth = texture2DRect(depthMap, pos_screen.xy).a;
+	return getPosition_d(pos_screen, depth);
+}
+
+vec3 getPositionEye()
+{
+	return vary_PositionEye;
+}
+vec3 getSunlitColor()
+{
+	return vary_SunlitColor;
+}
+vec3 getAmblitColor()
+{
+	return vary_AmblitColor;
+}
+vec3 getAdditiveColor()
+{
+	return vary_AdditiveColor;
+}
+vec3 getAtmosAttenuation()
+{
+	return vary_AtmosAttenuation;
+}
+
+
+void setPositionEye(vec3 v)
+{
+	vary_PositionEye = v;
+}
+
+void setSunlitColor(vec3 v)
+{
+	vary_SunlitColor = v;
+}
+
+void setAmblitColor(vec3 v)
+{
+	vary_AmblitColor = v;
+}
+
+void setAdditiveColor(vec3 v)
+{
+	vary_AdditiveColor = v;
+}
+
+void setAtmosAttenuation(vec3 v)
+{
+	vary_AtmosAttenuation = v;
+}
+
+void calcAtmospherics(vec3 inPositionEye, float ambFactor) {
+
+	vec3 P = inPositionEye;
+	setPositionEye(P);
+	
+	//(TERRAIN) limit altitude
+	if (P.y > max_y.x) P *= (max_y.x / P.y);
+	if (P.y < -max_y.x) P *= (-max_y.x / P.y);
+
+	vec3 tmpLightnorm = lightnorm.xyz;
+
+	vec3 Pn = normalize(P);
+	float Plen = length(P);
+
+	vec4 temp1 = vec4(0);
+	vec3 temp2 = vec3(0);
+	vec4 blue_weight;
+	vec4 haze_weight;
+	vec4 sunlight = sunlight_color;
+	vec4 light_atten;
+
+	//sunlight attenuation effect (hue and brightness) due to atmosphere
+	//this is used later for sunlight modulation at various altitudes
+	light_atten = (blue_density * 1.0 + vec4(haze_density.r) * 0.25) * (density_multiplier.x * max_y.x);
+		//I had thought blue_density and haze_density should have equal weighting,
+		//but attenuation due to haze_density tends to seem too strong
+
+	temp1 = blue_density + vec4(haze_density.r);
+	blue_weight = blue_density / temp1;
+	haze_weight = vec4(haze_density.r) / temp1;
+
+	//(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain)
+	temp2.y = max(0.0, tmpLightnorm.y);
+	temp2.y = 1. / temp2.y;
+	sunlight *= exp( - light_atten * temp2.y);
+
+	// main atmospheric scattering line integral
+	temp2.z = Plen * density_multiplier.x;
+
+	// Transparency (-> temp1)
+	// ATI Bugfix -- can't store temp1*temp2.z*distance_multiplier.x in a variable because the ati
+	// compiler gets confused.
+	temp1 = exp(-temp1 * temp2.z * distance_multiplier.x);
+
+	//final atmosphere attenuation factor
+	setAtmosAttenuation(temp1.rgb);
+	
+	//compute haze glow
+	//(can use temp2.x as temp because we haven't used it yet)
+	temp2.x = dot(Pn, tmpLightnorm.xyz);
+	temp2.x = 1. - temp2.x;
+		//temp2.x is 0 at the sun and increases away from sun
+	temp2.x = max(temp2.x, .03);	//was glow.y
+		//set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot)
+	temp2.x *= glow.x;
+		//higher glow.x gives dimmer glow (because next step is 1 / "angle")
+	temp2.x = pow(temp2.x, glow.z);
+		//glow.z should be negative, so we're doing a sort of (1 / "angle") function
+
+	//add "minimum anti-solar illumination"
+	temp2.x += .25;
+	
+	//increase ambient when there are more clouds
+	vec4 tmpAmbient = ambient*gi_ambiance + (vec4(1.) - ambient*gi_ambiance) * cloud_shadow.x * 0.5;
+	
+	/*  decrease value and saturation (that in HSV, not HSL) for occluded areas
+	 * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html
+	 * // The following line of code performs the equivalent of:
+	 * float ambAlpha = tmpAmbient.a;
+	 * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis
+	 * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue);
+	 * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha);
+	 */
+	tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a);
+
+	//haze color
+	setAdditiveColor(
+		vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow.x) + tmpAmbient)
+	  + (haze_horizon.r * haze_weight) * (sunlight*(1.-cloud_shadow.x) * temp2.x
+		  + tmpAmbient)));
+
+	//brightness of surface both sunlight and ambient
+	setSunlitColor(vec3(sunlight * .5));
+	setAmblitColor(vec3(tmpAmbient * .25));
+	setAdditiveColor(getAdditiveColor() * vec3(1.0 - temp1));
+}
+
+vec3 atmosLighting(vec3 light)
+{
+	light *= getAtmosAttenuation().r;
+	light += getAdditiveColor();
+	return (2.0 * light);
+}
+
+vec3 atmosTransport(vec3 light) {
+	light *= getAtmosAttenuation().r;
+	light += getAdditiveColor() * 2.0;
+	return light;
+}
+vec3 atmosGetDiffuseSunlightColor()
+{
+	return getSunlitColor();
+}
+
+vec3 scaleDownLight(vec3 light)
+{
+	return (light / scene_light_strength );
+}
+
+vec3 scaleUpLight(vec3 light)
+{
+	return (light * scene_light_strength);
+}
+
+vec3 atmosAmbient(vec3 light)
+{
+	return getAmblitColor() + light / 2.0;
+}
+
+vec3 atmosAffectDirectionalLight(float lightIntensity)
+{
+	return getSunlitColor() * lightIntensity;
+}
+
+vec3 scaleSoftClip(vec3 light)
+{
+	//soft clip effect:
+	light = 1. - clamp(light, vec3(0.), vec3(1.));
+	light = 1. - pow(light, gamma.xxx);
+
+	return light;
+}
+
+void main() 
+{
+	vec2 tc = vary_fragcoord.xy;
+	float depth = texture2DRect(depthMap, tc.xy).a;
+	vec3 pos = getPosition_d(tc, depth).xyz;
+	vec3 norm = texture2DRect(normalMap, tc).xyz;
+	norm = vec3((norm.xy-0.5)*2.0,norm.z); // unpack norm
+	//vec3 nz = texture2D(noiseMap, vary_fragcoord.xy/128.0).xyz;
+	
+	float da = max(dot(norm.xyz, vary_light.xyz), 0.0);
+	
+	vec4 diffuse = texture2DRect(diffuseRect, tc);
+	vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy);
+	
+	da = texture2D(lightFunc, vec2(da, 0.0)).a;
+		
+	vec2 scol_ambocc = texture2DRect(lightMap, vary_fragcoord.xy).rg;
+	float scol = max(scol_ambocc.r, diffuse.a); 
+	float ambocc = scol_ambocc.g;
+	
+	calcAtmospherics(pos.xyz, ambocc);
+	
+	vec3 col = atmosAmbient(vec3(0));
+	col += atmosAffectDirectionalLight(max(min(da, scol), diffuse.a));
+	
+	col *= diffuse.rgb;
+	
+	if (spec.a > 0.0) // specular reflection
+	{
+		// the old infinite-sky shiny reflection
+		//
+		vec3 refnormpersp = normalize(reflect(pos.xyz, norm.xyz));
+		float sa = dot(refnormpersp, vary_light.xyz);
+		vec3 dumbshiny = vary_SunlitColor*scol*texture2D(lightFunc, vec2(sa, spec.a)).a;
+
+		/*
+		// screen-space cheap fakey reflection map
+		//
+		vec3 refnorm = normalize(reflect(vec3(0,0,-1), norm.xyz));
+		depth -= 0.5; // unbias depth
+		// first figure out where we'll make our 2D guess from
+		vec2 ref2d = (0.25 * screen_res.y) * (refnorm.xy) * abs(refnorm.z) / depth;
+		// Offset the guess source a little according to a trivial
+		// checkerboard dither function and spec.a.
+		// This is meant to be similar to sampling a blurred version
+		// of the diffuse map.  LOD would be better in that regard.
+		// The goal of the blur is to soften reflections in surfaces
+		// with low shinyness, and also to disguise our lameness.
+		float checkerboard = floor(mod(tc.x+tc.y, 2.0)); // 0.0, 1.0
+		float checkoffset = (3.0 + (7.0*(1.0-spec.a)))*(checkerboard-0.5);
+
+		ref2d += vec2(checkoffset, checkoffset);
+		ref2d += tc.xy; // use as offset from destination
+		// Get attributes from the 2D guess point.
+		// We average two samples of diffuse (not of anything else) per
+		// pixel to try to reduce aliasing some more.
+		vec3 refcol = 0.5 * (texture2DRect(diffuseRect, ref2d + vec2(0.0, -checkoffset)).rgb +
+				     texture2DRect(diffuseRect, ref2d + vec2(-checkoffset, 0.0)).rgb);
+		float refdepth = texture2DRect(depthMap, ref2d).a;
+		vec3 refpos = getPosition_d(ref2d, refdepth).xyz;
+		float refshad = texture2DRect(lightMap, ref2d).r;
+		vec3 refn = texture2DRect(normalMap, ref2d).rgb;
+		refn = vec3((refn.xy-0.5)*2.0,refn.z); // unpack norm
+		refn = normalize(refn);
+		// figure out how appropriate our guess actually was
+		float refapprop = max(0.0, dot(-refnorm, normalize(pos - refpos)));
+		// darken reflections from points which face away from the reflected ray - our guess was a back-face
+		//refapprop *= step(dot(refnorm, refn), 0.0);
+		refapprop = min(refapprop, max(0.0, -dot(refnorm, refn))); // more conservative variant
+		// get appropriate light strength for guess-point.
+		// reflect light direction to increase the illusion that
+		// these are reflections.
+		vec3 reflight = reflect(lightnorm.xyz, norm.xyz);
+		float reflit = min(max(dot(refn, reflight.xyz), 0.0), refshad);
+		// apply sun color to guess-point, dampen according to inappropriateness of guess
+		float refmod = min(refapprop, reflit);
+		vec3 refprod = vary_SunlitColor * refcol.rgb * refmod;
+		vec3 ssshiny = (refprod * spec.a);
+		ssshiny *= 0.3; // dampen it even more
+		*/
+		vec3 ssshiny = vec3(0,0,0);
+
+		// add the two types of shiny together
+		col += (ssshiny + dumbshiny) * spec.rgb;
+	}
+	
+	col = atmosLighting(col);
+	col = scaleSoftClip(col);
+		
+	gl_FragColor.rgb = col;
+	
+	//gl_FragColor.rgb = gi_col.rgb;
+	gl_FragColor.a = 0.0;
+	
+	//gl_FragColor.rg = scol_ambocc.rg;
+	//gl_FragColor.rgb = texture2DRect(lightMap, vary_fragcoord.xy).rgb;
+	//gl_FragColor.rgb = norm.rgb*0.5+0.5;
+	//gl_FragColor.rgb = vec3(ambocc);
+	//gl_FragColor.rgb = vec3(scol);
+}