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115 lines
3.2 KiB
115 lines
3.2 KiB
from fontTools import ttLib
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from fontTools.ttLib.tables import otTables as ot
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# VariationStore
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def buildVarRegionAxis(axisSupport):
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self = ot.VarRegionAxis()
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self.StartCoord, self.PeakCoord, self.EndCoord = [float(v) for v in axisSupport]
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return self
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def buildVarRegion(support, axisTags):
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assert all(tag in axisTags for tag in support.keys()), ("Unknown axis tag found.", support, axisTags)
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self = ot.VarRegion()
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self.VarRegionAxis = []
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for tag in axisTags:
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self.VarRegionAxis.append(buildVarRegionAxis(support.get(tag, (0,0,0))))
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return self
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def buildVarRegionList(supports, axisTags):
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self = ot.VarRegionList()
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self.RegionAxisCount = len(axisTags)
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self.Region = []
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for support in supports:
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self.Region.append(buildVarRegion(support, axisTags))
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self.RegionCount = len(self.Region)
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return self
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def _reorderItem(lst, narrows, zeroes):
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out = []
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count = len(lst)
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for i in range(count):
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if i not in narrows:
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out.append(lst[i])
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for i in range(count):
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if i in narrows and i not in zeroes:
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out.append(lst[i])
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return out
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def VarData_calculateNumShorts(self, optimize=False):
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count = self.VarRegionCount
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items = self.Item
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narrows = set(range(count))
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zeroes = set(range(count))
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for item in items:
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wides = [i for i in narrows if not (-128 <= item[i] <= 127)]
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narrows.difference_update(wides)
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nonzeroes = [i for i in zeroes if item[i]]
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zeroes.difference_update(nonzeroes)
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if not narrows and not zeroes:
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break
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if optimize:
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# Reorder columns such that all SHORT columns come before UINT8
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self.VarRegionIndex = _reorderItem(self.VarRegionIndex, narrows, zeroes)
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self.VarRegionCount = len(self.VarRegionIndex)
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for i in range(len(items)):
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items[i] = _reorderItem(items[i], narrows, zeroes)
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self.NumShorts = count - len(narrows)
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else:
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wides = set(range(count)) - narrows
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self.NumShorts = 1+max(wides) if wides else 0
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self.VarRegionCount = len(self.VarRegionIndex)
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return self
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ot.VarData.calculateNumShorts = VarData_calculateNumShorts
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def VarData_CalculateNumShorts(self, optimize=True):
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"""Deprecated name for VarData_calculateNumShorts() which
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defaults to optimize=True. Use varData.calculateNumShorts()
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or varData.optimize()."""
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return VarData_calculateNumShorts(self, optimize=optimize)
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def VarData_optimize(self):
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return VarData_calculateNumShorts(self, optimize=True)
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ot.VarData.optimize = VarData_optimize
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def buildVarData(varRegionIndices, items, optimize=True):
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self = ot.VarData()
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self.VarRegionIndex = list(varRegionIndices)
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regionCount = self.VarRegionCount = len(self.VarRegionIndex)
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records = self.Item = []
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if items:
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for item in items:
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assert len(item) == regionCount
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records.append(list(item))
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self.ItemCount = len(self.Item)
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self.calculateNumShorts(optimize=optimize)
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return self
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def buildVarStore(varRegionList, varDataList):
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self = ot.VarStore()
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self.Format = 1
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self.VarRegionList = varRegionList
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self.VarData = list(varDataList)
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self.VarDataCount = len(self.VarData)
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return self
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# Variation helpers
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def buildVarIdxMap(varIdxes, glyphOrder):
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self = ot.VarIdxMap()
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self.mapping = {g:v for g,v in zip(glyphOrder, varIdxes)}
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return self
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def buildVarDevTable(varIdx):
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self = ot.Device()
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self.DeltaFormat = 0x8000
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self.StartSize = varIdx >> 16
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self.EndSize = varIdx & 0xFFFF
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return self
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