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font::ttf::coverage(3pm) [debian man page]

Font::TTF::Coverage(3pm)				User Contributed Perl Documentation				  Font::TTF::Coverage(3pm)

NAME

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

DESCRIPTION

       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.

METHODS

   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 table incrementing the count so that each subsequent addition has the next sequential number. Returns the
       index 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

AUTHOR

       Martin Hosken Martin_Hosken@sil.org. See Font::TTF::Font for copyright and licensing.

perl v5.10.1							    2011-02-25						  Font::TTF::Coverage(3pm)

Check Out this Related Man Page

Font::TTF::GDEF(3)					User Contributed Perl Documentation					Font::TTF::GDEF(3)

NAME

       Font::TTF::GDEF - Opentype GDEF table support

DESCRIPTION

       The GDEF table contains various global lists of information which are apparantly used in other places in an OpenType renderer. But
       precisely where is open to speculation...

INSTANCE VARIABLES

       There are up to 5 tables in the GDEF table, each with their own structure:

       GLYPH
	   This is an Font::TTF::Coverage Class Definition table containing information as to what type each glyph is.

       ATTACH
	   The attach table consists of a coverage table and then attachment points for each glyph in the coverage table:

	   COVERAGE
		   This is a coverage table

	   POINTS  This is an array of point elements. Each element is an array of curve points corresponding to the attachment points on that
		   glyph. The order of the curve points in the array corresponds to the attachment point number specified in the MARKS coverage
		   table (see below).

       LIG This contains the ligature caret positioning information for ligature glyphs

	   COVERAGE
		   A coverage table to say which glyphs are ligatures

	   LIGS    An array of elements for each ligature. Each element is an array of information for each caret position in the ligature (there
		   being number of components - 1 of these, generally)

		   FMT	       This is the format of the information and is important to provide the semantics for the value. This value must be
			       set correctly before output

		   VAL	       The value which has meaning according to FMT

		   DEVICE      For FMT = 3, a device table is also referenced which is stored here

       MARKS
	   This class definition table defines the classes of mark glyphs that can be selected for processing using the MarkAttachmentType field
	   of lookup FLAG words.

       MARKSETS
	   Contains an array of coverage tables indexed by the FILTER value of a lookup.

METHODS

   $t->read
       Reads the table into the data structure

   $t->out($fh)
       Writes out this table.

   $t->update
       Sort COVERAGE tables.

perl v5.16.3							    2012-08-08							Font::TTF::GDEF(3)
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