NAME

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