|
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 PDF::API2::TTF::Font for copyright and
licensing.
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