Font::TTF::Loca(3pm) User Contributed Perl Documentation Font::TTF::Loca(3pm)
NAME
Font::TTF::Loca - the Locations table, which is intimately tied to the
glyf table
DESCRIPTION
The location table holds the directory of locations of each glyph
within the glyf table. Due to this relationship and the unimportance of
the actual locations when it comes to holding glyphs in memory, reading
the location table results in the creation of glyph objects for each
glyph and stores them here. So if you are looking for glyphs, do not
look in the "glyf" table, look here instead.
Things get complicated if you try to change the glyph list within the
one table. The recommendation is to create another clean location
object to replace this table in the font, ensuring that the old table
is read first and to transfer or copy glyphs across from the read table
to the new table.
INSTANCE VARIABLES
The instance variables do not start with a space
glyphs
An array of glyph objects for each glyph.
glyphtype
A string containing the class name to create for each new glyph. If
empty, defaults to Font::TTF::Glyph.
METHODS
$t->new
Creates a new location table making sure it has a glyphs array
$t->read
Reads the location table creating glyph objects (Font::TTF::Glyph) for
each glyph allowing their later reading.
$t->out($fh)
Writes the location table out to $fh. Notice that not having read the
location table implies that the glyf table has not been read either, so
the numbers in the location table are still valid. Let's hope that
"maxp/numGlyphs" and "head/indexToLocFmt" haven't changed otherwise we
are in big trouble.
The function uses the OUTLOC location in the glyph calculated when the
glyf table was attempted to be output.
$t->out_xml($context, $depth)
No need to output a loca table, this is dynamically generated
$t->glyphs_do(&func)
Calls func for each glyph in this location table in numerical order:
&func($glyph, $glyph_num)
BUGS
None known
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.
perl v5.32.0 2020-12-27 Font::TTF::Loca(3pm)
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