Compass better spriting

gistfile1.sass

$sprite-layout: smart;
$sprite: sprite-map('sprite/*.png');

@mixin sprite-with-demension($map, $sprite-image) {
  background-image: $map;
  @include sprite-dimensions($map, $sprite-image);
  @include sprite-background-position($map, $sprite-image);
}

@mixin sprite-without-demension($map, $sprite-image) {
  background-image: $map;
}