1Font::TTF::GDEF(3)    User Contributed Perl Documentation   Font::TTF::GDEF(3)
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NAME

6       Font::TTF::GDEF - Opentype GDEF table support
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DESCRIPTION

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

14       There are 4 tables in the GDEF table, each with their own structure:
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16       GLYPH
17           This is an Font::TTF::Coverage Class Definition table containing
18           information as to what type each glyph is.
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20       ATTACH
21           The attach table consists of a coverage table and then attachment
22           points for each glyph in the coverage table:
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24           COVERAGE
25                   This is a coverage table
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27           POINTS  This is an array of point elements. Each element is an
28                   array of curve points corresponding to the attachment
29                   points on that glyph. The order of the curve points in the
30                   array corresponds to the attachment point number specified
31                   in the MARKS coverage table (see below).
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33       LIG This contains the ligature caret positioning information for liga‐
34           ture glyphs
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36           COVERAGE
37                   A coverage table to say which glyphs are ligatures
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39           LIGS    An array of elements for each ligature. Each element is an
40                   array of information for each caret position in the liga‐
41                   ture (there being number of components - 1 of these, gener‐
42                   ally)
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44                   FMT         This is the format of the information and is
45                               important to provide the semantics for the
46                               value. This value must be set correctly before
47                               output
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49                   VAL         The value which has meaning according to FMT
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51                   DEVICE      For FMT = 3, a device table is also referenced
52                               which is stored here
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54       MARKS
55           Due to confusion in the GDEF specification, this field is currently
56           withdrawn until the confusion is resolved. That way, perhaps this
57           stuff will work!
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59           This class definition table stores the mark attachment point num‐
60           bers for each attachment mark, to indicate which attachment point
61           the mark attaches to on its base glyph.
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METHODS

64       $t->read
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66       Reads the table into the data structure
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68       $t->out($fh)
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70       Writes out this table.
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74perl v5.8.8                       2005-06-14                Font::TTF::GDEF(3)
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