gistfile1.rb

module Prawn
  class Document
    #module CropMarks
 
    def draw_crop_marks(spacing, margin, lineweight)
      #crop mark line thickness
      line_width(lineweight)
  
      #spacing = 2.125
      #margin = 9
  
      #Draw crop marks
      canvas do
        # topleft corner
        stroke_line [bounds.left + spacing, bounds.top - margin], 
                    [bounds.left + margin - spacing, bounds.top - margin]
        stroke_line [bounds.left + margin, bounds.top - spacing], 
                    [bounds.left + margin, bounds.top - margin + spacing]
        # topright corner
        stroke_line [bounds.right - spacing, bounds.top - margin], 
                    [bounds.right - margin + spacing, bounds.top - margin]
        stroke_line [bounds.right - margin, bounds.top - spacing], 
                    [bounds.right - margin, bounds.top - margin + spacing]
 
        # bottomleft corner
        stroke_line [bounds.left + spacing, bounds.bottom + margin], 
                    [bounds.left + margin - spacing, bounds.bottom + margin]
        stroke_line [bounds.left + margin, bounds.bottom + spacing], 
                    [bounds.left + margin, bounds.bottom + margin - spacing]
 
        # bottomright corner
        stroke_line [bounds.right - spacing, bounds.bottom + margin], 
                    [bounds.right - margin + spacing, bounds.bottom + margin]
        stroke_line [bounds.right - margin, bounds.bottom + spacing], 
                    [bounds.right - margin, bounds.bottom + margin - spacing]
      end
    end
  end
end