Martin Hosken > Font-TTF-1.03 > Font::TTF::Dumper



Annotate this POD


Open  2
View/Report Bugs
Source   Latest Release: Font-TTF-1.04


Font::TTF::Dumper - Debug dump of a font datastructure, avoiding recursion on ' PARENT'


    use Font::TTF::Dumper;
    # Print a table from the font structure:
    print ttfdump($font->{$tag});
    # Print font table with name
    print ttfdump($font->{'head'}, 'head');
    # Print one glyph's data:
    print ttfdump($font->{'loca'}->read->{'glyphs'}[$gid], "glyph_$gid");


Font::TTF data structures are trees created from hashes and arrays. When trying to figure out how the structures work, sometimes it is helpful to use Data::Dumper on them. However, many of the object structures have ' PARENT' links that refer back to the object's parent, which means that Data::Dumper ends up dumping the whole font no matter what.

The purpose of this module is to do just one thing: invoke Data::Dumper with a filter that skips over the ' PARENT' element of any hash.

To reduce output further, this module also skips over ' CACHE' elements and any hash element whose value is a Font::TTF::Glyph or Font::TTF::Font object. (Really should make this configurable.)


Bob Hallissy


Copyright (c) 1998-2013, SIL International (

This module is released under the terms of the Artistic License 2.0. For details, see the full text of the license in the file LICENSE.

The test suite contains test fonts released under the SIL Open Font License 1.1, see OFL.txt.

syntax highlighting: