Class: RQRCode::Renderers::SVG

Inherits:
Object
  • Object
show all
Defined in:
lib/rqrcode_rails3/renderers/svg.rb

Class Method Summary collapse

Class Method Details

.render(qrcode, options = {}) ⇒ Object 



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# File 'lib/rqrcode_rails3/renderers/svg.rb', line 5

def render(qrcode, options={})
  # Padding around the qrcode 
  offset = options[:offset] || 0

  # height and width dependent on offset and QR complexity
  dimension = (qrcode.module_count*11) + (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}">}
  close_tag = "</svg>"

  result = []
  qrcode.modules.each_index do |c|
    tmp = []
    qrcode.modules.each_index do |r|
      y = c*11 + offset
      x = r*11 + offset
      row = %{<rect width="11" height="11" x="#{x}" y="#{y}" style="fill:#000"/>}
      col = options[:fill] ? %{<rect width="11" height="11" x="#{x}" y="#{y}" style="fill:#fff"/>} : ""
      if qrcode.is_dark(c,r)
        tmp << row 
      else
        tmp << col 
      end
    end 
    result << tmp.join
  end
  svg = [xml_tag, open_tag, result, close_tag].flatten.join("\n")
end