Index: src/base/ftlcdfil.c
===================================================================
--- src/base/ftlcdfil.c.orig	2008-12-17 22:43:42.000000000 -0800
+++ src/base/ftlcdfil.c	2008-12-20 23:52:26.000000000 -0800
@@ -274,9 +274,45 @@
                             { 0, 85, 86, 85, 0 };
     /* the values here sum up to a value larger than 256, */
     /* providing a cheap gamma correction                 */
-    static const FT_Byte  default_filter[5] =
+    static FT_Byte  default_filter[5] =
                             { 0x10, 0x40, 0x70, 0x40, 0x10 };
 
+    static int checked_filter_params_env = 0;
+
+    if (!checked_filter_params_env) {
+        char *filter_params = getenv( "FT_FILTER_PARAMS" );
+        if (filter_params != NULL ) {
+            float mid, peak, edge;
+            float peak_mult, mid_mult;
+            sscanf(filter_params, "%f %f",
+                   &peak_mult,
+                   &mid_mult
+                  );
+
+
+            peak = peak_mult;
+            mid = (1.0f - peak) * mid_mult * 0.5f;
+            edge = (1.0f - peak) * (1.0f - mid_mult) * 0.5f;
+
+	    fprintf(stderr, "-- weights: %f %f %f %f %f\n",
+                    edge, mid, peak, mid, edge);
+
+            default_filter[2] = (FT_Byte) (peak * 255.0f + 0.5f);
+            default_filter[0] = (FT_Byte) (edge * 255.0f + 0.5f);
+            default_filter[4] = default_filter[0];
+            default_filter[1] = (FT_Byte) (mid  * 255.0f + 0.5f);
+            default_filter[3] = default_filter[1];
+
+            fprintf(stderr, "-- calc'ed weights %d %d %d %d %d\n",
+                    default_filter[0],
+                    default_filter[1],
+                    default_filter[2],
+                    default_filter[3],
+                    default_filter[4]);
+
+        }
+	checked_filter_params_env = 1;
+    }
 
     if ( library == NULL )
       return FT_Err_Invalid_Argument;