class Magick::RVG::Pattern

def add_primitives(gc, style)
  name = __id__.to_s
  gc.pattern(name, @x, @y, @width, @height) do
    add_viewbox_primitives(@width, @height, gc)
    @content.each { |element| element.add_primitives(gc) }
  end
  gc.__send__(style, name)
end