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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METHODS

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

63       Martin Hosken Martin_Hosken@sil.org. See Font::TTF::Font for copyright
64       and licensing.
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POD ERRORS

67       Hey! The above document had some coding errors, which are explained
68       below:
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70       Around line 15:
71           '=item' outside of any '=over'
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73       Around line 34:
74           You forgot a '=back' before '=head1'
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78perl v5.16.3                      2011-10-13            Font::TTF::Coverage(3)