1Font::TTF::Coverage(3)User Contributed Perl DocumentationFont::TTF::Coverage(3)
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NAME

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

9       Coverage tables and class definition objects are virtually identical
10       concepts in OpenType. Their difference comes purely in their storage.
11       Therefore we can say that a coverage table is a class definition in
12       which the class definition for each glyph is the corresponding index in
13       the coverage table. The resulting data structure is that a Coverage
14       table has the following fields:
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16       cover
17           A boolean to indicate whether this table is a coverage table (TRUE)
18           or a class definition (FALSE)
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20       val A hash of glyph ids against values (either coverage index or class
21           value)
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23       fmt The storage format used is given here, but is recalculated when the
24           table is written out.
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26       count
27           A count of the elements in a coverage table for use with add. Each
28           subsequent addition is added with the current count and increments
29           the count.
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31       max Maximum class value in a class table.
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METHODS

34   new($isCover [, vals])
35       Creates a new coverage table or class definition table, depending upon
36       the value of $isCover. if $isCover then vals may be a list of glyphs to
37       include in order.  If no $isCover, then vals is a hash of glyphs
38       against class values.
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40   read($fh)
41       Reads the coverage/class table from the given file handle
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43   out($fh, $state)
44       Writes the coverage/class table to the given file handle. If $state is
45       1 then the output string is returned rather than being output to a
46       filehandle.
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48   $c->add($glyphid[, $class])
49       Adds a glyph id to the coverage or class table.  Returns the index or
50       class number of the glyphid added.
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52   $c->signature
53       Returns a vector of all the glyph ids covered by this coverage table or
54       class
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56   @map=$c->sort
57       Sorts the coverage table so that indexes are in ascending order of
58       glyphid.  Returns a map such that $map[$new_index]=$old_index.
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60   $c->out_xml($context)
61       Outputs this coverage/class in XML
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AUTHOR

64       Martin Hosken <http://scripts.sil.org/FontUtils>.
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LICENSING

67       Copyright (c) 1998-2016, SIL International (http://www.sil.org)
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69       This module is released under the terms of the Artistic License 2.0.
70       For details, see the full text of the license in the file LICENSE.
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74perl v5.38.0                      2023-07-20            Font::TTF::Coverage(3)
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