Module: RQRCode::Export::SVG

Defined in:
lib/rqrcode/export/svg.rb

Instance Method Summary collapse

Instance Method Details

#as_svg(options = {}) ⇒ Object

Render the SVG from the Qrcode.

Options: offset - Padding around the QR Code (e.g. 10) fill - Background color (e.g “ffffff” or :white) color - Foreground color for the code (e.g. “000000” or :black) module_size - The Pixel size of each module (e.g. 11) shape_rendering - Defaults to crispEdges



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# File 'lib/rqrcode/export/svg.rb', line 17

def as_svg(options={})
  offset = options[:offset].to_i || 0
  color = options[:color] || "000"
  shape_rendering = options[:shape_rendering] || "crispEdges"
  module_size = options[:module_size] || 11

  # height and width dependent on offset and QR complexity
  dimension = (self.module_count*module_size) + (2*offset)

  xml_tag = %{<?xml version="1.0" standalone="yes"?>}
  open_tag = %{<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ev="http://www.w3.org/2001/xml-events" width="#{dimension}" height="#{dimension}" shape-rendering="#{shape_rendering}">}
  close_tag = "</svg>"

  result = []
  self.modules.each_index do |c|
    tmp = []
    self.modules.each_index do |r|
      y = c*module_size + offset
      x = r*module_size + offset

      next unless self.is_dark(c, r)
      tmp << %{<rect width="#{module_size}" height="#{module_size}" x="#{x}" y="#{y}" style="fill:##{color}"/>}
    end
    result << tmp.join
  end

  if options[:fill]
    result.unshift %{<rect width="#{dimension}" height="#{dimension}" x="0" y="0" style="fill:##{options[:fill]}"/>}
  end

  [xml_tag, open_tag, result, close_tag].flatten.join("\n")
end