Module: TTFunk::Table::Cmap::Format12

Defined in:
lib/ttfunk/table/cmap/format12.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#code_map ⇒ Object (readonly)

Returns the value of attribute code_map.



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# File 'lib/ttfunk/table/cmap/format12.rb', line 7

def code_map
  @code_map
end

#language ⇒ Object (readonly)

Returns the value of attribute language.



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# File 'lib/ttfunk/table/cmap/format12.rb', line 6

def language
  @language
end

Class Method Details

.encode(charmap) ⇒ Object 



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# File 'lib/ttfunk/table/cmap/format12.rb', line 9

def self.encode(charmap)
  next_id = 0
  glyph_map = { 0 => 0 }
  range_firstglyphs, range_firstcodes, range_lengths = [], [], []
  last_glyph = last_code = -999

  new_map = charmap.keys.sort.inject({}) do |map, code|
    glyph_map[charmap[code]] ||= next_id += 1
    map[code] = { :old => charmap[code], :new => glyph_map[charmap[code]] }

    if code > last_code+1 || glyph_map[charmap[code]] > last_glyph+1
      range_firstcodes << code
      range_firstglyphs << glyph_map[charmap[code]]
      range_lengths << 1
    else
      range_lengths.push(range_lengths.pop) + 1
    end
    last_code = code
    last_glyph = glyph_map[charmap[code]]

    map
  end

  subtable = [12, 0, 16+12*range_lengths.size, 0, range_lengths.size].pack('nnNNN')
  range_lengths.each_with_index do |length, i|
    firstglyph, firstcode = range_firstglyphs[i], range_firstcodes[i]
    subtable << [firstcode, firstcode+length-1, firstglyph].pack('NNN')
  end

  { :charmap => new_map, :subtable => subtable, :max_glyph_id => next_id+1 }
end

Instance Method Details

#[](code) ⇒ Object 



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# File 'lib/ttfunk/table/cmap/format12.rb', line 41

def [](code)
  @code_map[code] || 0
end

#supported? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/ttfunk/table/cmap/format12.rb', line 45

def supported?
  true
end