module TTFunk::Table::Cmap::Format00
Format 0: Byte encoding table.
This module conditionally extends {TTFunk::Table::Cmap::Subtable}.
Attributes
Code map. @return [Array<Integer>]
Language. @return [Integer]
Public Class Methods
Source
# File lib/ttfunk/table/cmap/format00.rb, line 30 def self.encode(charmap) next_id = 0 glyph_indexes = Array.new(256, 0) glyph_map = { 0 => 0 } new_map = charmap.keys.sort.each_with_object({}) do |code, map| glyph_map[charmap[code]] ||= next_id += 1 map[code] = { old: charmap[code], new: glyph_map[charmap[code]] } glyph_indexes[code] = glyph_map[charmap[code]] map end # format, length, language, indices subtable = [0, 262, 0, *glyph_indexes].pack('nnnC*') { charmap: new_map, subtable: subtable, max_glyph_id: next_id + 1 } end
Encode the encoding record to format 0.
@param charmap [Hash{Integer => Integer}] a hash mapping character
codes to glyph ids (where the glyph ids are from the original font).
@return [Hash]
* `:charmap` (<tt>Hash{Integer => Hash}</tt>) keys are the characrers in `charset`, values are hashes: * `:old` (<tt>Integer</tt>) - glyph ID in the original font. * `:new` (<tt>Integer</tt>) - glyph ID in the subset font. that maps the characters in charmap to a * `:subtable` (<tt>String</tt>) - serialized encoding record. * `:max_glyph_id` (<tt>Integer</tt>) - maximum glyph ID in the new font.
Public Instance Methods
Source
# File lib/ttfunk/table/cmap/format00.rb, line 53 def [](code) @code_map[code] || 0 end
Get glyph ID for character code.
@param code [Integer] character code. @return [Integer] glyph ID.
Source
# File lib/ttfunk/table/cmap/format00.rb, line 60 def supported? true end
Is this encoding record format supported?
@return [true]
Private Instance Methods
Source
# File lib/ttfunk/table/cmap/format00.rb, line 66 def parse_cmap! @language = read(4, 'x2n') @code_map = read(256, 'C*') end