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from fontTools.misc.roundTools import noRound, otRound
from fontTools.misc.intTools import bit_count
from fontTools.misc.vector import Vector
from fontTools.ttLib.tables import otTables as ot
from fontTools.varLib.models import supportScalar
import fontTools.varLib.varStore # For monkey-patching
from fontTools.varLib.builder import (
buildVarRegionList,
buildSparseVarRegionList,
buildSparseVarRegion,
buildMultiVarStore,
buildMultiVarData,
)
from fontTools.misc.iterTools import batched
from functools import partial
from collections import defaultdict
from heapq import heappush, heappop
NO_VARIATION_INDEX = ot.NO_VARIATION_INDEX
ot.MultiVarStore.NO_VARIATION_INDEX = NO_VARIATION_INDEX
def _getLocationKey(loc):
return tuple(sorted(loc.items(), key=lambda kv: kv[0]))
class OnlineMultiVarStoreBuilder(object):
def __init__(self, axisTags):
self._axisTags = axisTags
self._regionMap = {}
self._regionList = buildSparseVarRegionList([], axisTags)
self._store = buildMultiVarStore(self._regionList, [])
self._data = None
self._model = None
self._supports = None
self._varDataIndices = {}
self._varDataCaches = {}
self._cache = None
def setModel(self, model):
self.setSupports(model.supports)
self._model = model
def setSupports(self, supports):
self._model = None
self._supports = list(supports)
if not self._supports[0]:
del self._supports[0] # Drop base master support
self._cache = None
self._data = None
def finish(self, optimize=True):
self._regionList.RegionCount = len(self._regionList.Region)
self._store.MultiVarDataCount = len(self._store.MultiVarData)
return self._store
def _add_MultiVarData(self):
regionMap = self._regionMap
regionList = self._regionList
regions = self._supports
regionIndices = []
for region in regions:
key = _getLocationKey(region)
idx = regionMap.get(key)
if idx is None:
varRegion = buildSparseVarRegion(region, self._axisTags)
idx = regionMap[key] = len(regionList.Region)
regionList.Region.append(varRegion)
regionIndices.append(idx)
# Check if we have one already...
key = tuple(regionIndices)
varDataIdx = self._varDataIndices.get(key)
if varDataIdx is not None:
self._outer = varDataIdx
self._data = self._store.MultiVarData[varDataIdx]
self._cache = self._varDataCaches[key]
if len(self._data.Item) == 0xFFFF:
# This is full. Need new one.
varDataIdx = None
if varDataIdx is None:
self._data = buildMultiVarData(regionIndices, [])
self._outer = len(self._store.MultiVarData)
self._store.MultiVarData.append(self._data)
self._varDataIndices[key] = self._outer
if key not in self._varDataCaches:
self._varDataCaches[key] = {}
self._cache = self._varDataCaches[key]
def storeMasters(self, master_values, *, round=round):
deltas = self._model.getDeltas(master_values, round=round)
base = deltas.pop(0)
return base, self.storeDeltas(deltas, round=noRound)
def storeDeltas(self, deltas, *, round=round):
deltas = tuple(round(d) for d in deltas)
if not any(deltas):
return NO_VARIATION_INDEX
deltas_tuple = tuple(tuple(d) for d in deltas)
if not self._data:
self._add_MultiVarData()
varIdx = self._cache.get(deltas_tuple)
if varIdx is not None:
return varIdx
inner = len(self._data.Item)
if inner == 0xFFFF:
# Full array. Start new one.
self._add_MultiVarData()
return self.storeDeltas(deltas, round=noRound)
self._data.addItem(deltas, round=noRound)
varIdx = (self._outer << 16) + inner
self._cache[deltas_tuple] = varIdx
return varIdx
def MultiVarData_addItem(self, deltas, *, round=round):
deltas = tuple(round(d) for d in deltas)
assert len(deltas) == self.VarRegionCount
values = []
for d in deltas:
values.extend(d)
self.Item.append(values)
self.ItemCount = len(self.Item)
ot.MultiVarData.addItem = MultiVarData_addItem
def SparseVarRegion_get_support(self, fvar_axes):
return {
fvar_axes[reg.AxisIndex].axisTag: (reg.StartCoord, reg.PeakCoord, reg.EndCoord)
for reg in self.SparseVarRegionAxis
}
ot.SparseVarRegion.get_support = SparseVarRegion_get_support
def MultiVarStore___bool__(self):
return bool(self.MultiVarData)
ot.MultiVarStore.__bool__ = MultiVarStore___bool__
class MultiVarStoreInstancer(object):
def __init__(self, multivarstore, fvar_axes, location={}):
self.fvar_axes = fvar_axes
assert multivarstore is None or multivarstore.Format == 1
self._varData = multivarstore.MultiVarData if multivarstore else []
self._regions = (
multivarstore.SparseVarRegionList.Region if multivarstore else []
)
self.setLocation(location)
def setLocation(self, location):
self.location = dict(location)
self._clearCaches()
def _clearCaches(self):
self._scalars = {}
def _getScalar(self, regionIdx):
scalar = self._scalars.get(regionIdx)
if scalar is None:
support = self._regions[regionIdx].get_support(self.fvar_axes)
scalar = supportScalar(self.location, support)
self._scalars[regionIdx] = scalar
return scalar
@staticmethod
def interpolateFromDeltasAndScalars(deltas, scalars):
if not deltas:
return Vector([])
assert len(deltas) % len(scalars) == 0, (len(deltas), len(scalars))
m = len(deltas) // len(scalars)
delta = Vector([0] * m)
for d, s in zip(batched(deltas, m), scalars):
if not s:
continue
delta += Vector(d) * s
return delta
def __getitem__(self, varidx):
major, minor = varidx >> 16, varidx & 0xFFFF
if varidx == NO_VARIATION_INDEX:
return Vector([])
varData = self._varData
scalars = [self._getScalar(ri) for ri in varData[major].VarRegionIndex]
deltas = varData[major].Item[minor]
return self.interpolateFromDeltasAndScalars(deltas, scalars)
def interpolateFromDeltas(self, varDataIndex, deltas):
varData = self._varData
scalars = [self._getScalar(ri) for ri in varData[varDataIndex].VarRegionIndex]
return self.interpolateFromDeltasAndScalars(deltas, scalars)
def MultiVarStore_subset_varidxes(self, varIdxes):
return ot.VarStore.subset_varidxes(self, varIdxes, VarData="MultiVarData")
def MultiVarStore_prune_regions(self):
return ot.VarStore.prune_regions(
self, VarData="MultiVarData", VarRegionList="SparseVarRegionList"
)
ot.MultiVarStore.prune_regions = MultiVarStore_prune_regions
ot.MultiVarStore.subset_varidxes = MultiVarStore_subset_varidxes
def MultiVarStore_get_supports(self, major, fvarAxes):
supports = []
varData = self.MultiVarData[major]
for regionIdx in varData.VarRegionIndex:
region = self.SparseVarRegionList.Region[regionIdx]
support = region.get_support(fvarAxes)
supports.append(support)
return supports
ot.MultiVarStore.get_supports = MultiVarStore_get_supports
def VARC_collect_varidxes(self, varidxes):
for glyph in self.VarCompositeGlyphs.VarCompositeGlyph:
for component in glyph.components:
varidxes.add(component.axisValuesVarIndex)
varidxes.add(component.transformVarIndex)
def VARC_remap_varidxes(self, varidxes_map):
for glyph in self.VarCompositeGlyphs.VarCompositeGlyph:
for component in glyph.components:
component.axisValuesVarIndex = varidxes_map[component.axisValuesVarIndex]
component.transformVarIndex = varidxes_map[component.transformVarIndex]
ot.VARC.collect_varidxes = VARC_collect_varidxes
ot.VARC.remap_varidxes = VARC_remap_varidxes
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