gistfile1.rb

require 'rubygems'
require 'prawn'
require 'prawn/measurement_extensions'
require 'RMagick'

show_name = ARGV[0]
output_name = ARGV[1]

Prawn::Document.generate("#{output_name}.pdf", :page_size => [11.in, 17.in], :left_margin => 0, :top_margin => 0, :right_margin => 0, :bottom_margin => 0) do
  background = File.join(File.dirname(__FILE__),'assets/poster-background.jpg')
  image background, :at => [0,17.in], :fit => [11.in,17.in] 
  
  font(File.join(File.dirname(__FILE__), '../fonts/FFF-Tusj.ttf'))
  
  name_size = 150
  
  bounding_box [0.5.in,16.in], :width => 10.in, :height => 12.in do
    font_size name_size
    words = show_name.split(" ")
    while words.collect{ |w| width_of(w) }.max > 10.in
      name_size -= 10
      font_size name_size
    end 
    
    if words.length == 1
      # there's a bug with the valign, so we do this...
      text_box "\n\n"+show_name, :align => :center, :overflow => :shrink_to_fit
    else
      text_box show_name, :align => :center, :valign => :center, :overflow => :shrink_to_fit
    end
  end
    
end

img = Magick::Image::read("#{output_name}.pdf").first
img.write("#{output_name}.jpg")