def _add_HVAR(font, model, master_ttfs, axisTags):
print("Generating HVAR")
hAdvanceDeltas = {}
metricses = [m["hmtx"].metrics for m in master_ttfs]
for glyph in font.getGlyphOrder():
hAdvances = [metrics[glyph][0] for metrics in metricses]
# TODO move round somewhere else?
hAdvanceDeltas[glyph] = tuple(
round(d) for d in model.getDeltas(hAdvances)[1:])
# We only support the direct mapping right now.
supports = model.supports[1:]
varTupleList = builder.buildVarRegionList(supports, axisTags)
varTupleIndexes = list(range(len(supports)))
n = len(supports)
items = []
zeroes = [0] * n
for glyphName in font.getGlyphOrder():
items.append(hAdvanceDeltas.get(glyphName, zeroes))
while items and items[-1] is zeroes:
del items[-1]
advanceMapping = None
# Add indirect mapping to save on duplicates
uniq = set(items)
# TODO Improve heuristic
if (len(items) - len(uniq)) * len(varTupleIndexes) > len(items):
newItems = sorted(uniq)
mapper = {v: i for i, v in enumerate(newItems)}
mapping = [mapper[item] for item in items]
while len(mapping) > 1 and mapping[-1] == mapping[-2]:
del mapping[-1]
advanceMapping = builder.buildVarIdxMap(mapping)
items = newItems
del mapper, mapping, newItems
del uniq
varData = builder.buildVarData(varTupleIndexes, items)
varStore = builder.buildVarStore(varTupleList, [varData])
assert "HVAR" not in font
HVAR = font["HVAR"] = newTable('HVAR')
hvar = HVAR.table = ot.HVAR()
hvar.Version = 0x00010000
hvar.VarStore = varStore
hvar.AdvWidthMap = advanceMapping
hvar.LsbMap = hvar.RsbMap = None
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
def _add_HVAR(font, model, master_ttfs, axisTags):
log.info("Generating HVAR")
hAdvanceDeltas = {}
metricses = [m["hmtx"].metrics for m in master_ttfs]
for glyph in font.getGlyphOrder():
hAdvances = [metrics[glyph][0] for metrics in metricses]
# TODO move round somewhere else?
hAdvanceDeltas[glyph] = tuple(
round(d) for d in model.getDeltas(hAdvances)[1:])
# Direct mapping
supports = model.supports[1:]
varTupleList = builder.buildVarRegionList(supports, axisTags)
varTupleIndexes = list(range(len(supports)))
n = len(supports)
items = []
for glyphName in font.getGlyphOrder():
items.append(hAdvanceDeltas[glyphName])
# Build indirect mapping to save on duplicates, compare both sizes
uniq = list(set(items))
mapper = {v: i for i, v in enumerate(uniq)}
mapping = [mapper[item] for item in items]
advanceMapping = builder.buildVarIdxMap(mapping, font.getGlyphOrder())
# Direct
varData = builder.buildVarData(varTupleIndexes, items)
directStore = builder.buildVarStore(varTupleList, [varData])
# Indirect
varData = builder.buildVarData(varTupleIndexes, uniq)
indirectStore = builder.buildVarStore(varTupleList, [varData])
mapping = indirectStore.optimize()
advanceMapping.mapping = {
k: mapping[v]
for k, v in advanceMapping.mapping.items()
}
# 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
