class PDF::Writer::Object::Procset

The document Procedure Set. Not necessary in PDF 1.4 or later, but producing applications are recommended to provide the /ProcSet /Resource in any case for older viewers. Viewing applications are not recommended to rely on this information being correct.

These procedure sets are used only when the content stream is printed to a PostScript output device; the names identify PostScript procedure sets that must be sent to the device to interpret the PDF operators in the content stream. Each element of this array must be one of the following predefined names: ‘PDF’, ‘Text’, ‘ImageB’, ‘ImageC’, and ‘ImageI’. See also Appendix H note 102.

Public Class Methods

new(parent) click to toggle source
Calls superclass method PDF::Writer::Object::new
   # File lib/pdf/writer/object/procset.rb
23 def initialize(parent)
24   super
25 
26   @info = ["PDF", "Text"]
27   @parent.pages.procset = self
28   @parent.procset = self
29 end

Public Instance Methods

<<(p) click to toggle source

This is to add new items to the procset list, despite the fact that this is considered obselete, the items are required for printing to some PostsCript printers.

p may be ‘ImageB’, ‘ImageC’, or ‘ImageI’.

   # File lib/pdf/writer/object/procset.rb
36 def <<(p)
37   @info << p
38 end
to_s() click to toggle source
   # File lib/pdf/writer/object/procset.rb
40 def to_s
41   info = @info.uniq
42   res = "\n#{@oid} 0 obj\n["
43   @info.each { |k| res << "/#{k} " }
44   res << "]\nendobj"
45 end