class RQRCode::Export::SVG::Rect

def build(module_size, options = {})
  # Extract values from options
  color = options[:color]
  offset_x = options[:offset_x].to_i
  offset_y = options[:offset_y].to_i
  # Prefix hexadecimal colors unless using a named color (symbol)
  color = "##{color}" unless color.is_a?(Symbol)
  @qrcode.modules.each_index do |c|
    tmp = []
    @qrcode.modules.each_index do |r|
      x = r * module_size + offset_x
      y = c * module_size + offset_y
      next unless @qrcode.checked?(c, r)
      tmp << %(<rect width="#{module_size}" height="#{module_size}" x="#{x}" y="#{y}" fill="#{color}"/>)
    end
    @result << tmp.join
  end
end