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PDF::API2::Basic::TTF::OldMort
Glyph Metamorphosis table in a font

PDF::API2::Basic::TTF::OldMort - Glyph Metamorphosis table in a font


NAME

PDF::API2::Basic::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 the PDF::API2::Basic::TTF::Font manpage for copyright and licensing.

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