def _add_MVAR(font, model, master_ttfs, axisTags):
log.info("Generating MVAR")
store_builder = builder.OnlineVarStoreBuilder(axisTags)
store_builder.setModel(model)
records = []
lastTableTag = None
fontTable = None
tables = None
for tag, (tableTag, itemName) in sorted(_MVAR_entries.items(),
key=lambda kv: kv[1]):
if tableTag != lastTableTag:
tables = fontTable = None
if tableTag in font:
# TODO Check all masters have same table set?
fontTable = font[tableTag]
tables = [master[tableTag] for master in master_ttfs]
lastTableTag = tableTag
if tables is None:
continue
# TODO support gasp entries
master_values = [getattr(table, itemName) for table in tables]
if _all_equal(master_values):
base, varIdx = master_values[0], None
else:
base, varIdx = store_builder.storeMasters(master_values)
setattr(fontTable, itemName, base)
if varIdx is None:
continue
log.info(' %s: %s.%s %s', tag, tableTag, itemName, master_values)
rec = ot.MetricsValueRecord()
rec.ValueTag = tag
rec.VarIdx = varIdx
records.append(rec)
assert "MVAR" not in font
if records:
MVAR = font["MVAR"] = newTable('MVAR')
mvar = MVAR.table = ot.MVAR()
mvar.Version = 0x00010000
mvar.Reserved = 0
mvar.VarStore = store_builder.finish()
# XXX these should not be hard-coded but computed automatically
mvar.ValueRecordSize = 8
mvar.ValueRecordCount = len(records)
mvar.ValueRecord = sorted(records, key=lambda r: r.ValueTag)
def __init__(self, model, axisTags):
self.model = model
self.store_builder = builder.OnlineVarStoreBuilder(axisTags)
self.store_builder.setModel(model)