1 files changed, 112 insertions, 0 deletions

diff --git a/linden/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl b/linden/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
new file mode 100644
index 0000000..0055a73
--- /dev/null
+++ b/linden/indra/newview/app_settings/shaders/class2/deferred/alphaF.glsl
@@ -0,0 +1,112 @@
+/** 
+ * @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;
+
+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 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 /= pos.w;
+        pos.w = 1.0;
+        return pos;
+}
+
+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 *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap3, lpos).x;
+                        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 *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap2, lpos).x;
+                }
+                else if (spos.z < -shadow_clip.x)
+                {
+                        lpos = shadow_matrix[1]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap1, lpos).x;
+                }
+                else
+                {
+                        lpos = shadow_matrix[0]*spos;
+                        lpos.xy *= screen_res;
+                        shadow = shadow2DRectProj(shadowMap0, lpos).x;
+                }
+        }
+        
+        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)
+        {
+                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;
+        
+}
+