# File lib/compass/sass_extensions/sprites/sprite_map.rb, line 37
        def initialize(sprites, path, name, context, kwargs)
          @image_names = sprites
          @path = path
          @name = name
          @kwargs = kwargs
          @kwargs['cleanup'] ||= bool(true)
          @kwargs['layout'] ||= identifier('vertical')
          @kwargs['sort_by'] ||= identifier('none')
          @images = nil
          @width = nil
          @height = nil
          @engine = nil
          @evaluation_context = context
          compute_image_metadata!
        end