Font::TTF::OTTags - Utilities for TrueType/OpenType tags

  use Font::TTF::OTTags qw( %tttags %ttnames %iso639 readtagsfile );

  # Look at built-in stuff:
  $script_tag = $tttags{'SCRIPT'}{'Cypriot Syllabary'};  # returns 'cprt'
  $lang_name = $ttnames{'LANGUAGE'}{'ALT '};             # returns 'Altai'

  # Map iso639 tag to/from OT lang tag
  @isotags = $iso639{'ALT '};    # returns [ 'atv', 'alt' ]
  $lang_tag = $iso639{'atv'};    # returns 'ALT '

  # Read latest tags file to add to built-in definitions
  readtagsfile ("C:\\Program Files\\Microsoft VOLT\\TAGS.txt");

First-level keys to %tttags and %ttnames are:

'SCRIPT' -- retrieve script tag or name

'LANGUAGE' -- retrieve language tag or name

'FEATURE' -- retrieve feature tag or name

Built-in data has been derived from Microsofts tag registry at http://www.microsoft.com/typography/otspec/ttoreg.htm, updated to draft v1.5 of the OpenType Spec.

Read a file in the syntax of Tags.txt (included with Microsoft VOLT) to obtain additional/replacement tag definitions.

Returns 0 if cannot open the file; else 1.