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:
cover
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 value) | ||
|
fmt |
The storage format used is given here, but is recalculated when the table is written out. |
count
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 $isCover,
then vals is a hash of glyphs against class values.
read($fh)
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 filehandle.
$c−>add($glyphid[,
$class])
Adds a glyph id to the coverage or class table. Returns the
index or class number of the glyphid added.
$c−>signature
Returns a vector of all the glyph ids covered by this
coverage table or class
@map=$c−>sort
Sorts the coverage table so that indexes are in ascending
order of glyphid. Returns a map such that
$map[$new_index]=$old_index.
$c−>out_xml($context)
Outputs this coverage/class in XML
Martin Hosken <http://scripts.sil.org/FontUtils>.
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.