Class: Pdfrb::Font::CMap::Writer

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfrb/font/cmap/writer.rb

Overview

Writes a CMap text file from a bfchar mapping. Used when embedding CID fonts with a subset of glyphs.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(cmap_name:, cid_system_info:, mapping:) ⇒ Writer

Returns a new instance of Writer.



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# File 'lib/pdfrb/font/cmap/writer.rb', line 11

def initialize(cmap_name:, cid_system_info:, mapping:)
  @cmap_name = cmap_name
  @cid_system_info = cid_system_info
  @mapping = mapping
end

Instance Attribute Details

#cid_system_info ⇒ Object (readonly)

Returns the value of attribute cid_system_info.



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# File 'lib/pdfrb/font/cmap/writer.rb', line 9

def cid_system_info
  @cid_system_info
end

#cmap_name ⇒ Object (readonly)

Returns the value of attribute cmap_name.



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# File 'lib/pdfrb/font/cmap/writer.rb', line 9

def cmap_name
  @cmap_name
end

#mapping ⇒ Object (readonly)

Returns the value of attribute mapping.



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# File 'lib/pdfrb/font/cmap/writer.rb', line 9

def mapping
  @mapping
end

Instance Method Details

#to_s ⇒ Object 



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# File 'lib/pdfrb/font/cmap/writer.rb', line 17

def to_s
  buffer = +""
  buffer << "/CIDInit /ProcSet findresource begin\n"
  buffer << "12 dict begin\n"
  buffer << "begincmap\n"
  buffer << "/CIDSystemInfo <<\n"
  buffer << "  /Registry (Adobe)\n"
  buffer << "  /Ordering (#{@cid_system_info[:ordering]})\n"
  buffer << "  /Supplement #{@cid_system_info[:supplement]}\n"
  buffer << ">> def\n"
  buffer << "/CMapName /#{@cmap_name} def\n"
  buffer << "/CMapType 1 def\n"
  buffer << "1 begincodespacerange\n"
  buffer << "  <0000> <FFFF>\n"
  buffer << "endcodespacerange\n"
  buffer << "#{@mapping.length} beginbfchar\n"
  @mapping.each do |code, unicode|
    buffer << "<%04X> <%04X>\n" % [code, unicode]
  end
  buffer << "endbfchar\n"
  buffer << "endcmap\n"
  buffer << "CMapName currentdict /CMap defineresource pop\n"
  buffer << "end\n"
  buffer << "end\n"
  buffer.force_encoding(Encoding::BINARY)
end