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

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

NAME

       Font::TTF::OldMort - Glyph Metamorphosis table in a font

DESCRIPTION

INSTANCE VARIABLES

       version
	   table version number (Fixed: currently 1.0)

       chains
	   list of metamorphosis chains, each of which has its own fields:

	   defaultFlags
	       chain's default subfeature flags (UInt32)

	   featureEntries
	       list of feature entries, each of which has fields:

	       type
	       setting
	       enable
	       disable
	   subtables
	       list of metamorphosis subtables, each of which has fields:

	       type
		   subtable type (0: rearrangement; 1: contextual substitution; 2: ligature; 4: non-contextual substitution; 5: insertion)

	       direction
		   processing direction ('LR' or 'RL')

	       orientation
		   applies to text in which orientation ('VH', 'V', or 'H')

	       subFeatureFlags
		   the subfeature flags controlling whether the table is used (UInt32)

	       Further fields depend on the type of subtable:

		   Rearrangement table:

		   classes
		       array of lists of glyphs

		   states
		       array of arrays of hashes{'nextState', 'flags'}

		   Contextual substitution table:

		   classes
		       array of lists of glyphs

		   states
		       array of array of hashes{'nextState', 'flags', 'actions'}, where "actions" is an array of two elements which are offsets to
		       be added to [marked, current] glyph to get index into "mappings" (or "undef" if no mapping to be applied)

		   mappings
		       list of glyph codes mapped to through the state table mappings

		   Ligature table:

		   Non-contextual substitution table:

		   Insertion table:

METHODS

   $t->read
       Reads the table into memory

   $t->out($fh)
       Writes the table to a file either from memory or by copying

   $t->print($fh)
       Prints a human-readable representation of the table

BUGS

       None known

AUTHOR

       Jonathan Kew Jonathan_Kew@sil.org. See Font::TTF::Font for copyright and licensing.

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

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

NAME

       Font::TTF::Kern - Kerning tables

DESCRIPTION

       Kerning tables are held as an ordered collection of subtables each giving incremental information regarding the kerning of various pairs of
       glyphs.

       The basic structure of the kerning data structure is:

	   $kern = $f->{'kern'}{'tables'}[$tnum]{'kerns'}{$leftnum}{$rightnum};

       Due to the possible complexity of some kerning tables the above information is insufficient. Reference also needs to be made to the type of
       the table and the coverage field.

INSTANCE VARIABLES

       The instance variables for a kerning table are relatively straightforward.

       Version
	   Version number of the kerning table

       Num Number of subtables in the kerning table

       tables
	   Array of subtables in the kerning table

	   Each subtable has a number of instance variables.

	   kern
	       A two level hash array containing kerning values. The indexing is left value and then right value. In the case of type 2 tables,
	       the indexing is via left class and right class. It may seem using hashes is strange, but most tables are not type 2 and this method
	       saves empty array values.

	   type
	       Stores the table type. Only type 0 and type 2 tables are specified for TrueType so far.

	   coverage
	       A bit field of coverage information regarding the kerning value. See the TrueType specification for details.

	   Version
	       Contains the version number of the table.

	   Num Number of kerning pairs in this type 0 table.

	   left
	       An array indexed by glyph - left_first which returns a class number for the glyph in type 2 tables.

	   right
	       An array indexed by glyph - right_first which returns a class number for the glyph in type 2 tables.

	   left_first
	       the glyph number of the first element in the left array for type 2 tables.

	   right_first
	       the glyph number of the first element in the right array for type 2 tables.

	   num_left
	       Number of left classes

	   num_right
	       Number of right classes

METHODS

   $t->read
       Reads the whole kerning table into structures

   $t->out($fh)
       Outputs the kerning tables to the given file

   $t->XML_element($context, $depth, $key, $value)
       Handles outputting the kern hash into XML a little more tidily

BUGS

       o   Only supports kerning table types 0 & 2.

       o   No real support functions to do anything with the kerning tables yet.

AUTHOR

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

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