def _add_MVAR(font, model, master_ttfs, axisTags):
log.info("Generating MVAR")
store_builder = varStore.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:
store = store_builder.finish()
# Optimize
mapping = store.optimize()
for rec in records:
rec.VarIdx = mapping[rec.VarIdx]
MVAR = font["MVAR"] = newTable('MVAR')
mvar = MVAR.table = ot.MVAR()
mvar.Version = 0x00010000
mvar.Reserved = 0
mvar.VarStore = store
# 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, font):
Merger.__init__(self, font)
self.store_builder = varStore.OnlineVarStoreBuilder(axisTags)
self.setModel(model)
def _add_MVAR(font, masterModel, master_ttfs, axisTags):
log.info("Generating MVAR")
store_builder = varStore.OnlineVarStoreBuilder(axisTags)
records = []
lastTableTag = None
fontTable = None
tables = None
# HACK: we need to special-case post.underlineThickness and .underlinePosition
# and unilaterally/arbitrarily define a sentinel value to distinguish the case
# when a post table is present in a given master simply because that's where
# the glyph names in TrueType must be stored, but the underline values are not
# meant to be used for building MVAR's deltas. The value of -0x8000 (-36768)
# the minimum FWord (int16) value, was chosen for its unlikelyhood to appear
# in real-world underline position/thickness values.
specialTags = {"unds": -0x8000, "undo": -0x8000}
for tag, (tableTag, itemName) in sorted(MVAR_ENTRIES.items(),
key=lambda kv: kv[1]):
# For each tag, fetch the associated table from all fonts (or not when we are
# still looking at a tag from the same tables) and set up the variation model
# for them.
if tableTag != lastTableTag:
tables = fontTable = None
if tableTag in font:
fontTable = font[tableTag]
tables = []
for master in master_ttfs:
if tableTag not in master or (
tag in specialTags
and getattr(master[tableTag],
itemName) == specialTags[tag]):
tables.append(None)
else:
tables.append(master[tableTag])
model, tables = masterModel.getSubModel(tables)
store_builder.setModel(model)
lastTableTag = tableTag
if tables is None: # Tag not applicable to the master font.
continue
# TODO support gasp entries
master_values = [getattr(table, itemName) for table in tables]
if models.allEqual(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:
store = store_builder.finish()
# Optimize
mapping = store.optimize()
for rec in records:
rec.VarIdx = mapping[rec.VarIdx]
MVAR = font["MVAR"] = newTable('MVAR')
mvar = MVAR.table = ot.MVAR()
mvar.Version = 0x00010000
mvar.Reserved = 0
mvar.VarStore = store
# 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 _get_advance_metrics(font,
masterModel,
master_ttfs,
axisTags,
glyphOrder,
advMetricses,
vOrigMetricses=None):
vhAdvanceDeltasAndSupports = {}
vOrigDeltasAndSupports = {}
for glyph in glyphOrder:
vhAdvances = [
metrics[glyph][0] if glyph in metrics else None
for metrics in advMetricses
]
vhAdvanceDeltasAndSupports[glyph] = masterModel.getDeltasAndSupports(
vhAdvances, round=round)
singleModel = models.allEqual(
id(v[1]) for v in vhAdvanceDeltasAndSupports.values())
if vOrigMetricses:
singleModel = False
for glyph in glyphOrder:
# We need to supply a vOrigs tuple with non-None default values
# for each glyph. vOrigMetricses contains values only for those
# glyphs which have a non-default vOrig.
vOrigs = [
metrics[glyph] if glyph in metrics else defaultVOrig
for metrics, defaultVOrig in vOrigMetricses
]
vOrigDeltasAndSupports[glyph] = masterModel.getDeltasAndSupports(
vOrigs, round=round)
directStore = None
if singleModel:
# Build direct mapping
supports = next(iter(vhAdvanceDeltasAndSupports.values()))[1][1:]
varTupleList = builder.buildVarRegionList(supports, axisTags)
varTupleIndexes = list(range(len(supports)))
varData = builder.buildVarData(varTupleIndexes, [], optimize=False)
for glyphName in glyphOrder:
varData.addItem(vhAdvanceDeltasAndSupports[glyphName][0],
round=noRound)
varData.optimize()
directStore = builder.buildVarStore(varTupleList, [varData])
# Build optimized indirect mapping
storeBuilder = varStore.OnlineVarStoreBuilder(axisTags)
advMapping = {}
for glyphName in glyphOrder:
deltas, supports = vhAdvanceDeltasAndSupports[glyphName]
storeBuilder.setSupports(supports)
advMapping[glyphName] = storeBuilder.storeDeltas(deltas, round=noRound)
if vOrigMetricses:
vOrigMap = {}
for glyphName in glyphOrder:
deltas, supports = vOrigDeltasAndSupports[glyphName]
storeBuilder.setSupports(supports)
vOrigMap[glyphName] = storeBuilder.storeDeltas(deltas,
round=noRound)
indirectStore = storeBuilder.finish()
mapping2 = indirectStore.optimize()
advMapping = [mapping2[advMapping[g]] for g in glyphOrder]
advanceMapping = builder.buildVarIdxMap(advMapping, glyphOrder)
if vOrigMetricses:
vOrigMap = [mapping2[vOrigMap[g]] for g in glyphOrder]
useDirect = False
vOrigMapping = None
if directStore:
# Compile both, see which is more compact
writer = OTTableWriter()
directStore.compile(writer, font)
directSize = len(writer.getAllData())
writer = OTTableWriter()
indirectStore.compile(writer, font)
advanceMapping.compile(writer, font)
indirectSize = len(writer.getAllData())
useDirect = directSize < indirectSize
if useDirect:
metricsStore = directStore
advanceMapping = None
else:
metricsStore = indirectStore
if vOrigMetricses:
vOrigMapping = builder.buildVarIdxMap(vOrigMap, glyphOrder)
return metricsStore, advanceMapping, vOrigMapping
def _add_HVAR(font, masterModel, master_ttfs, axisTags):
log.info("Generating HVAR")
glyphOrder = font.getGlyphOrder()
hAdvanceDeltasAndSupports = {}
metricses = [m["hmtx"].metrics for m in master_ttfs]
for glyph in glyphOrder:
hAdvances = [
metrics[glyph][0] if glyph in metrics else None
for metrics in metricses
]
hAdvanceDeltasAndSupports[glyph] = masterModel.getDeltasAndSupports(
hAdvances)
singleModel = models.allEqual(
id(v[1]) for v in hAdvanceDeltasAndSupports.values())
directStore = None
if singleModel:
# Build direct mapping
supports = next(iter(hAdvanceDeltasAndSupports.values()))[1][1:]
varTupleList = builder.buildVarRegionList(supports, axisTags)
varTupleIndexes = list(range(len(supports)))
varData = builder.buildVarData(varTupleIndexes, [], optimize=False)
for glyphName in glyphOrder:
varData.addItem(hAdvanceDeltasAndSupports[glyphName][0])
varData.optimize()
directStore = builder.buildVarStore(varTupleList, [varData])
# Build optimized indirect mapping
storeBuilder = varStore.OnlineVarStoreBuilder(axisTags)
mapping = {}
for glyphName in glyphOrder:
deltas, supports = hAdvanceDeltasAndSupports[glyphName]
storeBuilder.setSupports(supports)
mapping[glyphName] = storeBuilder.storeDeltas(deltas)
indirectStore = storeBuilder.finish()
mapping2 = indirectStore.optimize()
mapping = [mapping2[mapping[g]] for g in glyphOrder]
advanceMapping = builder.buildVarIdxMap(mapping, glyphOrder)
use_direct = False
if directStore:
# Compile both, see which is more compact
writer = OTTableWriter()
directStore.compile(writer, font)
directSize = len(writer.getAllData())
writer = OTTableWriter()
indirectStore.compile(writer, font)
advanceMapping.compile(writer, font)
indirectSize = len(writer.getAllData())
use_direct = directSize < indirectSize
# Done; put it all together.
assert "HVAR" not in font
HVAR = font["HVAR"] = newTable('HVAR')
hvar = HVAR.table = ot.HVAR()
hvar.Version = 0x00010000
hvar.LsbMap = hvar.RsbMap = None
if use_direct:
hvar.VarStore = directStore
hvar.AdvWidthMap = None
else:
hvar.VarStore = indirectStore
hvar.AdvWidthMap = advanceMapping
