module HexaPDF::Font::TrueType::Table::CmapSubtable::Format6

Cmap format 6

Public Class Methods

parse(io, length) → code_map click to toggle source

Parses the format 6 cmap subtable from the given IO at the current position and returns the contained code map.

It is assumed that the first six bytes of the subtable have already been consumed.

# File lib/hexapdf/font/true_type/table/cmap_subtable.rb, line 321
def self.parse(io, _length)
  first_code, entry_count = io.read(4).unpack('n2')
  code_map = io.read(2 * entry_count).unpack('n*')
  gid_map = {}
  code_map = code_map.each_with_index.with_object({}) do |(g, i), hash|
    hash[first_code + i] = g
    gid_map[g] = first_code + i
  end
  [code_map, gid_map]
end