class TTFunk::Table::Head
Attributes
Public Class Methods
Source
# File lib/ttfunk/table/head.rb, line 28 def encode(head, loca, mapping) EncodedString.new do |table| table << [head.version, head.font_revision].pack('N2') << Placeholder.new(:checksum, length: 4) << [ head.magic_number, head.flags, head.units_per_em, head.created, head.modified, *min_max_values_for(head, mapping), head.mac_style, head.lowest_rec_ppem, head.font_direction_hint, loca[:type] || 0, head.glyph_data_format ].pack('Nn2q2n*') end end
mapping is new -> old glyph ids
Private Class Methods
Source
# File lib/ttfunk/table/head.rb, line 46 def min_max_values_for(head, mapping) x_min = Min.new x_max = Max.new y_min = Min.new y_max = Max.new mapping.each do |_, old_glyph_id| glyph = head.file.find_glyph(old_glyph_id) next unless glyph x_min << glyph.x_min x_max << glyph.x_max y_min << glyph.y_min y_max << glyph.y_max end [ x_min.value_or(0), y_min.value_or(0), x_max.value_or(0), y_max.value_or(0) ] end
Private Instance Methods
Source
# File lib/ttfunk/table/head.rb, line 71 def parse! @version, @font_revision, @check_sum_adjustment, @magic_number, @flags, @units_per_em, @created, @modified = read(36, 'N4n2q2') @x_min, @y_min, @x_max, @y_max = read_signed(4) @mac_style, @lowest_rec_ppem, @font_direction_hint, @index_to_loc_format, @glyph_data_format = read(10, 'n*') end