1 files changed, 132 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
new file mode 100644
index 0000000000..ad16de6d81
--- /dev/null
+++ b/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
@@ -0,0 +1,132 @@
+/** 
+ * @file alphaF.glsl
+ *
+ * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#extension GL_ARB_texture_rectangle : enable
+
+uniform sampler2D diffuseMap;
+uniform sampler2DRectShadow shadowMap0;
+uniform sampler2DRectShadow shadowMap1;
+uniform sampler2DRectShadow shadowMap2;
+uniform sampler2DRectShadow shadowMap3;
+uniform sampler2D noiseMap;
+uniform sampler2DRect depthMap;
+
+uniform mat4 shadow_matrix[6];
+uniform vec4 shadow_clip;
+uniform vec2 screen_res;
+uniform vec2 shadow_res;
+
+vec3 atmosLighting(vec3 light);
+vec3 scaleSoftClip(vec3 light);
+
+varying vec3 vary_ambient;
+varying vec3 vary_directional;
+varying vec3 vary_fragcoord;
+varying vec3 vary_position;
+varying vec3 vary_light;
+
+uniform float alpha_soften;
+
+uniform float shadow_bias;
+
+uniform mat4 inv_proj;
+
+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.xyz /= pos.w;
+	pos.w = 1.0;
+	return pos;
+}
+
+float pcfShadow(sampler2DRectShadow shadowMap, vec4 stc, float scl)
+{
+	stc.xyz /= stc.w;
+	stc.z += shadow_bias;
+	
+	float cs = shadow2DRect(shadowMap, stc.xyz).x;
+	float shadow = cs;
+
+	shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(scl, scl, 0.0)).x, cs);
+	shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(scl, -scl, 0.0)).x, cs);
+	shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-scl, scl, 0.0)).x, cs);
+	shadow += max(shadow2DRect(shadowMap, stc.xyz+vec3(-scl, -scl, 0.0)).x, cs);
+			
+	return shadow/5.0;
+}
+
+
+void main() 
+{
+	vec2 frag = vary_fragcoord.xy/vary_fragcoord.z*0.5+0.5;
+	frag *= screen_res;
+	
+	vec3 samp_pos = getPosition(frag).xyz;
+	
+	float shadow = 1.0;
+	vec4 pos = vec4(vary_position, 1.0);
+	
+	vec4 spos = pos;
+		
+	if (spos.z > -shadow_clip.w)
+	{	
+		vec4 lpos;
+		
+		if (spos.z < -shadow_clip.z)
+		{
+			lpos = shadow_matrix[3]*spos;
+			lpos.xy *= shadow_res;
+			shadow = pcfShadow(shadowMap3, lpos, 1.5);
+			shadow += max((pos.z+shadow_clip.z)/(shadow_clip.z-shadow_clip.w)*2.0-1.0, 0.0);
+		}
+		else if (spos.z < -shadow_clip.y)
+		{
+			lpos = shadow_matrix[2]*spos;
+			lpos.xy *= shadow_res;
+			shadow = pcfShadow(shadowMap2, lpos, 1.5);
+		}
+		else if (spos.z < -shadow_clip.x)
+		{
+			lpos = shadow_matrix[1]*spos;
+			lpos.xy *= shadow_res;
+			shadow = pcfShadow(shadowMap1, lpos, 1.5);
+		}
+		else
+		{
+			lpos = shadow_matrix[0]*spos;
+			lpos.xy *= shadow_res;
+			shadow = pcfShadow(shadowMap0, lpos, 1.5);
+		}
+	}
+	
+	vec4 col = vec4(vary_ambient + vary_directional.rgb*shadow, gl_Color.a);
+	vec4 color = texture2D(diffuseMap, gl_TexCoord[0].xy) * col;
+	
+	color.rgb = atmosLighting(color.rgb);
+
+	color.rgb = scaleSoftClip(color.rgb);
+
+	if (samp_pos.z != 0.0 && gl_Color.a < 1.0)
+	{
+		float dist_factor = alpha_soften;
+		float a = gl_Color.a;
+		a *= a;
+		dist_factor *= 1.0/(1.0-a);
+		color.a *= min((pos.z-samp_pos.z)*dist_factor, 1.0);
+	}
+	
+	//gl_FragColor = gl_Color;
+	gl_FragColor = color;
+	//gl_FragColor = vec4(1,0,1,1)*shadow;
+	
+}
+