class RQRCode::Renderers::SVG
Public Class Methods
render(qrcode, options={})
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Render the SVG from the qrcode string provided from the RQRCode gem
Options: offset - Padding around the QR Code (e.g. 10) unit - How many pixels per module (Default: 11) fill - Background color (e.g "ffffff" or :white) color - Foreground color for the code (e.g. "000000" or :black)
# File lib/rqrcode-rails3/renderers/svg.rb, line 12 def render(qrcode, options={}) offset = options[:offset].to_i || 0 color = options[:color] || "000" unit = options[:unit] || 11 # height and width dependent on offset and QR complexity dimension = (qrcode.module_count*unit) + (2*offset) xml_tag = %Q{<?xml version="1.0" standalone="yes"?>} open_tag = %Q{<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*unit + offset x = r*unit + offset next unless qrcode.is_dark(c, r) tmp << %Q{<rect width="#{unit}" height="#{unit}" x="#{x}" y="#{y}" style="fill:##{color}"/>} end result << tmp.join end if options[:fill] result.unshift %Q{<rect width="#{dimension}" height="#{dimension}" x="0" y="0" style="fill:##{options[:fill]}"/>} end svg = [xml_tag, open_tag, result, close_tag].flatten.join("\n") end