=image-dimensions($file)
  height: image-height($file)
  width: image-width($file)

=sprite-image($file)
  background: sprite-image($file) $repeat

=sized-sprite-image($file)
  background: sprite-image($file)
  +image-dimensions($file)

=sprite-folder($folder, $image-dimensions: false)
  .#{$folder}
    @if $image-dimensions
      background: sprite-url($folder)
    @else
      background: sprite-url($folder) no-repeat
  @for $i from 0 to sprite-files-in-folder($folder)
    $file: sprite-file-from-folder($folder, $i)
    .#{$folder}-#{image-basename($file)}
      @extend .#{$folder}
      background-position: sprite-position(sprite-file-from-folder($folder, $i))
      @if $image-dimensions
        +image-dimensions($file)

=sized-sprite-folder($folder)
  +sprite-folder($folder, true)