class AFM::Font
Attributes
Public Class Methods
Source
# File lib/afm.rb, line 80 def self.from_file(file) new(file) end
alias for new()
Source
# File lib/afm.rb, line 36 def initialize(filename) @metadata = {} @char_metrics = {} @char_metrics_by_code = {} @kern_pairs = [] File.open(filename) do |file| mode = :meta file.each_line do |line| case line when /^StartFontMetrics/ then mode = :meta when /^StartCharMetrics/ then mode = :char_metrics when /^EndCharMetrics/ then mode = :meta when /^StartKernData/ then mode = :kern_data when /^StartKernPairs/ then mode = :kern_pairs when /^EndKernPairs/ then mode = :kern_data when /^EndKernData/ then mode = :meta else case mode when :meta if (match = line.match(/^([\w]+) (.*)$/)) @metadata[match[1]] = match[2] end when :char_metrics metrics = {} metrics[:charcode] = match[1].to_i if (match = line.match(/C (-?\d+) *?;/)) metrics[:wx] = match[1].to_i if (match = line.match(/WX (-?\d+) *?;/)) metrics[:name] = match[1] if (match = line.match(/N ([.\w]+) *?;/)) if (match = line.match(/B (-?\d+) (-?\d+) (-?\d+) (-?\d+) *?;/)) metrics[:boundingbox] = [match[1].to_i, match[2].to_i, match[3].to_i, match[4].to_i] end @char_metrics[metrics[:name]] = metrics if metrics[:name] @char_metrics_by_code[metrics[:charcode]] = metrics if metrics[:charcode] && metrics[:charcode] > 0 when :kern_pairs if (match = line.match(/^KPX ([.\w]+) ([.\w]+) (-?\d+)$/)) @kern_pairs << [match[1], match[2], match[3].to_i] end end end end end end
Loading a Font
Metrics file by absolute path (no automatic font path resolution)
Public Instance Methods
Source
# File lib/afm.rb, line 95 def metrics_for(char) glyph = if char.is_a?(Integer) ISO_LATIN1_ENCODING[char] else ISO_LATIN1_ENCODING[char.unpack1("C")] end @char_metrics[glyph] end
Get metrics for character. Takes an integer (charcode) or a one-char string. currently works only for Latin1 strings, since we only have a chartable for the Latin1 charset so far. (shamelessly stolen from AFM.pm by Gisle Aas)