Compass mixin to simulate text-stroke using text-shadow

gistfile1.txt

@import "compass/css3/text-shadow";

@mixin text-stroke-with-shadow($thickness, $color, $blur) {
   @include text-shadow( $thickness 0 $blur $color, 
                        (-$thickness) 0 $blur $color, 
                        0 $thickness $blur $color, 
                        0 (-$thickness) $blur $color, 
                        ($thickness/2) ($thickness/2) $blur $color, 
                        ((-$thickness)/2) ((-$thickness)/2) $blur $color, 
                        ($thickness/2) ((-$thickness)/2) $blur $color, 
                        ((-$thickness)/2) ($thickness/2) $blur $color);
}