Gecko [ lorencats.com ]

Name	Size	Permission	Action
metrics.rb	1.64 KB	-rwxr-xr-x

Code Editor : metrics.rb

#!/usr/bin/ruby
# encoding: utf-8
require 'ttfunk'

def character_lookup(file, character)
  puts "character     : #{character}"

character_code = character.unpack('U*').first
  puts "character code: #{character_code}"

glyph_id = file.cmap.unicode.first[character_code]
  puts "glyph id      : #{glyph_id}"

glyph = file.glyph_outlines.for(glyph_id)
  puts format('glyph type    : %s', glyph.class.name.split(/::/).last.downcase)
  puts format('glyph size    : %db', glyph.raw.length)
  puts format('glyph bbox    : (%d,%d)-(%d,%d)',
    glyph.x_min, glyph.y_min, glyph.x_max, glyph.y_max)

if glyph.compound?
    puts format('components    : %d %s',
      glyph.glyph_ids.length, glyph.glyph_ids.inspect)
  end
end

file_name = ARGV.first || File.join(__dir__, '../data/fonts/DejaVuSans.ttf')
file_name = ARGV.first || '/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf'
file = TTFunk::File.open(file_name)

puts '-- FONT ------------------------------------'

puts format('revision  : %08x', file.header.font_revision)
puts "name      : #{file.name.font_name.join(', ')}"
puts "family    : #{file.name.font_family.join(', ')}"
puts "subfamily : #{file.name.font_subfamily.join(', ')}"
puts "postscript: #{file.name.postscript_name}"

puts '-- FONT METRICS ----------------------------'

puts "units/em  : #{file.header.units_per_em}"
puts "ascent    : #{file.ascent}"
puts "descent   : #{file.descent}"
puts "line gap  : #{file.line_gap}"
puts format('bbox      : (%d,%d)-(%d,%d)', *file.bbox)

puts '-- SIMPLE CHARACTER -> GLYPH LOOKUP --------'
character_lookup(file, "\xE2\x98\x9C")

puts '-- COMPOUND CHARACTER -> GLYPH LOOKUP ------'
character_lookup(file, 'ë')

${this.title}

Code Editor : metrics.rb