Font::TTF::GDEF - phpMan

NAME
    Font::TTF::GDEF - Opentype GDEF table support

DESCRIPTION
    The GDEF table contains various global lists of information which are
    apparantly used in other places in an OpenType renderer. But precisely
    where is open to speculation...

INSTANCE VARIABLES
    There are up to 5 tables in the GDEF table, each with their own
    structure:

    GLYPH
        This is an Font::TTF::Coverage Class Definition table containing
        information as to what type each glyph is.

    ATTACH
        The attach table consists of a coverage table and then attachment
        points for each glyph in the coverage table:

        COVERAGE
                This is a coverage table

        POINTS  This is an array of point elements. Each element is an array
                of curve points corresponding to the attachment points on
                that glyph. The order of the curve points in the array
                corresponds to the attachment point number specified in the
                MARKS coverage table (see below).

    LIG This contains the ligature caret positioning information for
        ligature glyphs

        COVERAGE
                A coverage table to say which glyphs are ligatures

        LIGS    An array of elements for each ligature. Each element is an
                array of information for each caret position in the ligature
                (there being number of components - 1 of these, generally)

                FMT         This is the format of the information and is
                            important to provide the semantics for the
                            value. This value must be set correctly before
                            output

                VAL         The value which has meaning according to FMT

                DEVICE      For FMT = 3, a device table is also referenced
                            which is stored here

    MARKS
        This class definition table defines the classes of mark glyphs that
        can be selected for processing using the MarkAttachmentType field of
        lookup FLAG words.

    MARKSETS
        Contains an array of coverage tables indexed by the FILTER value of
        a lookup.

METHODS
  $t->read
    Reads the table into the data structure

  $t->out($fh)
    Writes out this table.

  $t->minsize()
    Returns the minimum size this table can be. If it is smaller than this,
    then the table must be bad and should be deleted or whatever.

  $t->update
    Sort COVERAGE tables.

AUTHOR
    Martin Hosken <http://scripts.sil.org/FontUtils>.

LICENSING
    Copyright (c) 1998-2016, SIL International (http://www.sil.org)

    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.