SL-17194 Impostor quality pass 2 (and fix for fully transparent rigged attachments rendering to depth buffer)

1 files changed, 16 insertions, 13 deletions

diff --git a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
index 38afd82c8d..02b2daf0ac 100644
--- a/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
+++ b/indra/newview/app_settings/shaders/class1/deferred/alphaF.glsl
@@ -56,7 +56,7 @@ VARYING vec3 vary_norm;
 VARYING vec4 vertex_color; //vertex color should be treated as sRGB
 #endif
 
-#ifdef FOR_IMPOSTOR
+#ifdef HAS_ALPHA_MASK
 uniform float minimum_alpha;
 #endif
 
@@ -195,7 +195,6 @@ void main()
 #endif
 
     vec4 diffuse_srgb = diffuse_tap;
-    vec4 diffuse_linear = vec4(srgb_to_linear(diffuse_srgb.rgb), diffuse_srgb.a);
 
 #ifdef FOR_IMPOSTOR
     vec4 color;
@@ -204,33 +203,37 @@ void main()
 
     float final_alpha = diffuse_srgb.a * vertex_color.a;
     diffuse_srgb.rgb *= vertex_color.rgb;
-    diffuse_linear.rgb = srgb_to_linear(diffuse_srgb.rgb); 
     
     // Insure we don't pollute depth with invis pixels in impostor rendering
     //
-    if (final_alpha <  minimum_alpha)
+    if (final_alpha < minimum_alpha)
     {
         discard;
     }
 
     color.rgb = diffuse_srgb.rgb;
     color.a = final_alpha;
-#else
-    
+
+#else // FOR_IMPOSTOR
+
+    vec4 diffuse_linear = vec4(srgb_to_linear(diffuse_srgb.rgb), diffuse_srgb.a);
+
     vec3 light_dir = (sun_up_factor == 1) ? sun_dir: moon_dir;
 
     float final_alpha = diffuse_linear.a;
 
 #ifdef USE_VERTEX_COLOR
-    if (vertex_color.a <= 0.0)
+    final_alpha *= vertex_color.a;
+
+    if (final_alpha < minimum_alpha)
     { // TODO: figure out how to get invisible faces out of 
         // render batches without breaking glow
         discard;
     }
-    final_alpha *= vertex_color.a;
+
     diffuse_srgb.rgb *= vertex_color.rgb;
     diffuse_linear.rgb = srgb_to_linear(diffuse_srgb.rgb);
-#endif
+#endif // USE_VERTEX_COLOR
 
     vec3 sunlit;
     vec3 amblit;
@@ -262,13 +265,13 @@ void main()
 #if !defined(AMBIENT_KILL)
     color.rgb = amblit;
     color.rgb *= ambient;
-#endif
+#endif // !defined(AMBIENT_KILL)
 
 vec3 post_ambient = color.rgb;
 
 #if !defined(SUNLIGHT_KILL)
     color.rgb += sun_contrib;
-#endif
+#endif // !defined(SUNLIGHT_KILL)
 
 vec3 post_sunlight = color.rgb;
 
@@ -300,7 +303,7 @@ vec3 post_atmo = color.rgb;
     // sum local light contrib in linear colorspace
 #if !defined(LOCAL_LIGHT_KILL)
     color.rgb += light.rgb;
-#endif
+#endif // !defined(LOCAL_LIGHT_KILL)
     // back to sRGB as we're going directly to the final RT post-deferred gamma correction
     color.rgb = linear_to_srgb(color.rgb);
 
@@ -319,7 +322,7 @@ vec3 post_atmo = color.rgb;
     color = applyWaterFogView(pos.xyz, color);
 #endif // WATER_FOG
 
-#endif
+#endif // #else // FOR_IMPOSTOR
 
     frag_color = color;
 }