lib/ttfunk/directory.rb in ttfunk-1.5.1 vs lib/ttfunk/directory.rb in ttfunk-1.6.0

@@ -1,11 +1,17 @@
+# frozen_string_literal: true
+
 module TTFunk
   class Directory
     attr_reader :tables
     attr_reader :scaler_type
 
     def initialize(io, offset = 0)
       io.seek(offset)
+
+      # https://www.microsoft.com/typography/otspec/otff.htm#offsetTable
+      # We're ignoring searchRange, entrySelector, and rangeShift here, but
+      # skipping past them to get to the table information.
       @scaler_type, table_count = io.read(12).unpack('Nn')
 
       @tables = {}
       table_count.times do
         tag, checksum, offset, length = io.read(16).unpack('a4N*')