Class: PDF::Writer::Object::Procset

Inherits:
PDF::Writer::Object show all
Defined in:
lib/pdf/writer/object/procset.rb

Overview

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.

Instance Attribute Summary

Attributes inherited from PDF::Writer::Object

#oid

Instance Method Summary collapse

Constructor Details

#initialize(parent) ⇒ Procset

Returns a new instance of Procset.



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# File 'lib/pdf/writer/object/procset.rb', line 23

def initialize(parent)
  super

  @info = ["PDF", "Text"]
  @parent.pages.procset = self
  @parent.procset = self
end

Instance Method Details

#<<(p) ⇒ Object

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’.



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# File 'lib/pdf/writer/object/procset.rb', line 36

def <<(p)
  @info << p
end

#to_s ⇒ Object 



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# File 'lib/pdf/writer/object/procset.rb', line 40

def to_s
  info = @info.uniq
  res = "\n#{@oid} 0 obj\n["
  @info.each { |k| res << "/#{k} " }
  res << "]\nendobj"
end