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:
-
Rearrangement table:
-
-