From: Tobias Reif <tobiasreif@...>
Date: 2002-05-26T06:10:15+09:00
Subject: base64

Hi,

how can I base64 encode an image so I can inline it in SVG like

<image width="400" height="300"
xlink:href="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAYABgAAD/2wBDAAs...

?

This is from RDoc's web/images/conv.rb; would it to what I want? Will it 
work for PNGs and JPEGs as well?:
----------8<----------
# Convert a binary .gif file into a String so we can write it out
# from inside a Ruby program

name = ARGV.shift || raise("Missing name")

content = File.open(name, "rb") {|f| f.read}

content = [content].pack("m*").split("\n")

name.gsub!(/\./, '_').upcase!

puts "#{name} = ("
puts(content.collect {|line| "\t" + line.dump} .join(" +\n") +
   ").unpack('m*')[0]")
----------8<----------

Tobi

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