phpman > perldoc > Font::TTF::GDEF(3pm)

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.