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Font::TTF::Coverage(3)User Contributed Perl DocumentatioFont::TTF::Coverage(3)

       Font::TTF::Coverage - Opentype coverage and class definition objects

       Coverage	tables and class definition objects are	virtually identical
       concepts	in OpenType. Their difference comes purely in their storage.
       Therefore we can	say that a coverage table is a class definition	in
       which the class definition for each glyph is the	corresponding index in
       the coverage table. The resulting data structure	is that	a Coverage
       table has the following fields:

	   A boolean to	indicate whether this table is a coverage table	(TRUE)
	   or a	class definition (FALSE)

       val A hash of glyph ids against values (either coverage index or	class

       fmt The storage format used is given here, but is recalculated when the
	   table is written out.

	   A count of the elements in a	coverage table for use with add. Each
	   subsequent addition is added	with the current count and increments
	   the count.

       max Maximum class value in a class table.

   new($isCover	[, vals])
       Creates a new coverage table or class definition	table, depending upon
       the value of $isCover. if $isCover then vals may	be a list of glyphs to
       include in order.  If no	$isCover, then vals is a hash of glyphs
       against class values.

       Reads the coverage/class	table from the given file handle

   out($fh, $state)
       Writes the coverage/class table to the given file handle. If $state is
       1 then the output string	is returned rather than	being output to	a

   $c->add($glyphid[, $class])
       Adds a glyph id to the coverage or class	table.	Returns	the index or
       class number of the glyphid added.

       Returns a vector	of all the glyph ids covered by	this coverage table or

       Sorts the coverage table	so that	indexes	are in ascending order of
       glyphid.	 Returns a map such that $map[$new_index]=$old_index.

       Outputs this coverage/class in XML

       Martin Hosken <>.

       Copyright (c) 1998-2016,	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.

perl v5.24.1			  2016-08-03		Font::TTF::Coverage(3)


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