0010a3cd9a
Do not round them to integer, but let the caller do the rounding immediately before adding them to the default instance (or just before compiling the binary table as with glyf). This ensures that the glyphs' left sidebearings are calculated in the same way as they were by varLib.mutator. If we round deltas too early, then we may get off-by-one differences. See the glyf table setCoordinates method where left sidebearings are computed.
734 lines
26 KiB
Python
734 lines
26 KiB
Python
""" Partially instantiate a variable font.
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This is similar to fontTools.varLib.mutator, but instead of creating full
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instances (i.e. static fonts) from variable fonts, it creates "partial"
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variable fonts, only containing a subset of the variation space.
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For example, if you wish to pin the width axis to a given location while
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keeping the rest of the axes, you can do:
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$ fonttools varLib.instancer ./NotoSans-VF.ttf wdth=85
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NOTE: The module is experimental and both the API and the CLI *will* change.
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"""
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from __future__ import print_function, division, absolute_import
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from fontTools.misc.py23 import *
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from fontTools.misc.fixedTools import floatToFixedToFloat, otRound
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from fontTools.varLib.models import supportScalar, normalizeValue, piecewiseLinearMap
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from fontTools.ttLib import TTFont
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from fontTools.ttLib.tables.TupleVariation import TupleVariation
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from fontTools.ttLib.tables._g_l_y_f import GlyphCoordinates
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from fontTools import varLib
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from fontTools.varLib import builder
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from fontTools.varLib.mvar import MVAR_ENTRIES
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from fontTools.varLib.merger import MutatorMerger
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import collections
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from copy import deepcopy
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import logging
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import os
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import re
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log = logging.getLogger("fontTools.varlib.instancer")
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def instantiateTupleVariationStore(variations, location, origCoords=None, endPts=None):
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newVariations = collections.OrderedDict()
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for var in variations:
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# Compute the scalar support of the axes to be pinned at the desired location,
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# excluding any axes that we are not pinning.
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# If a TupleVariation doesn't mention an axis, it implies that the axis peak
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# is 0 (i.e. the axis does not participate).
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support = {axis: var.axes.pop(axis, (-1, 0, +1)) for axis in location}
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scalar = supportScalar(location, support)
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if scalar == 0.0:
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# no influence, drop the TupleVariation
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continue
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# compute inferred deltas only for gvar ('origCoords' is None for cvar)
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if origCoords is not None:
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var.calcInferredDeltas(origCoords, endPts)
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var.scaleDeltas(scalar)
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# merge TupleVariations with overlapping "tents"
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axes = tuple(var.axes.items())
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if axes in newVariations:
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newVariations[axes] += var
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else:
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newVariations[axes] = var
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# drop TupleVariation if all axes have been pinned (var.axes.items() is empty);
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# its deltas will be added to the default instance's coordinates
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defaultVar = newVariations.pop(tuple(), None)
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for var in newVariations.values():
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var.roundDeltas()
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variations[:] = list(newVariations.values())
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return defaultVar.coordinates if defaultVar is not None else []
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def instantiateGvarGlyph(varfont, glyphname, location, optimize=True):
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glyf = varfont["glyf"]
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coordinates, ctrl = glyf.getCoordinatesAndControls(glyphname, varfont)
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endPts = ctrl.endPts
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gvar = varfont["gvar"]
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tupleVarStore = gvar.variations[glyphname]
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defaultDeltas = instantiateTupleVariationStore(
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tupleVarStore, location, coordinates, endPts
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)
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if defaultDeltas:
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coordinates += GlyphCoordinates(defaultDeltas)
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# this will also set the hmtx/vmtx advance widths and sidebearings from
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# the four phantom points and glyph bounding boxes
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glyf.setCoordinates(glyphname, coordinates, varfont)
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if not tupleVarStore:
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del gvar.variations[glyphname]
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return
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if optimize:
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isComposite = glyf[glyphname].isComposite()
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for var in tupleVarStore:
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var.optimize(coordinates, endPts, isComposite)
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def instantiateGvar(varfont, location, optimize=True):
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log.info("Instantiating glyf/gvar tables")
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gvar = varfont["gvar"]
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glyf = varfont["glyf"]
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# Get list of glyph names in gvar sorted by component depth.
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# If a composite glyph is processed before its base glyph, the bounds may
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# be calculated incorrectly because deltas haven't been applied to the
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# base glyph yet.
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glyphnames = sorted(
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gvar.variations.keys(),
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key=lambda name: (
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glyf[name].getCompositeMaxpValues(glyf).maxComponentDepth
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if glyf[name].isComposite()
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else 0,
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name,
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),
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)
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for glyphname in glyphnames:
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instantiateGvarGlyph(varfont, glyphname, location, optimize=optimize)
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if not gvar.variations:
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del varfont["gvar"]
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def setCvarDeltas(cvt, deltas):
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for i, delta in enumerate(deltas):
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if delta is not None:
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cvt[i] += otRound(delta)
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def instantiateCvar(varfont, location):
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log.info("Instantiating cvt/cvar tables")
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cvar = varfont["cvar"]
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defaultDeltas = instantiateTupleVariationStore(cvar.variations, location)
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if defaultDeltas:
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setCvarDeltas(varfont["cvt "], defaultDeltas)
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if not cvar.variations:
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del varfont["cvar"]
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def setMvarDeltas(varfont, deltas):
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mvar = varfont["MVAR"].table
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records = mvar.ValueRecord
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for rec in records:
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mvarTag = rec.ValueTag
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if mvarTag not in MVAR_ENTRIES:
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continue
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tableTag, itemName = MVAR_ENTRIES[mvarTag]
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delta = deltas[rec.VarIdx]
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if delta != 0:
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setattr(
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varfont[tableTag],
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itemName,
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getattr(varfont[tableTag], itemName) + otRound(delta),
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)
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def instantiateMVAR(varfont, location):
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log.info("Instantiating MVAR table")
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mvar = varfont["MVAR"].table
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fvarAxes = varfont["fvar"].axes
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varStore = mvar.VarStore
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defaultDeltas = instantiateItemVariationStore(varStore, fvarAxes, location)
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setMvarDeltas(varfont, defaultDeltas)
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if varStore.VarRegionList.Region:
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varIndexMapping = varStore.optimize()
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for rec in mvar.ValueRecord:
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rec.VarIdx = varIndexMapping[rec.VarIdx]
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else:
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del varfont["MVAR"]
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def _remapVarIdxMap(table, attrName, varIndexMapping, glyphOrder):
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oldMapping = getattr(table, attrName).mapping
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newMapping = [varIndexMapping[oldMapping[glyphName]] for glyphName in glyphOrder]
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setattr(table, attrName, builder.buildVarIdxMap(newMapping, glyphOrder))
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# TODO(anthrotype) Add support for HVAR/VVAR in CFF2
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def _instantiateVHVAR(varfont, location, tableFields):
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tableTag = tableFields.tableTag
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fvarAxes = varfont["fvar"].axes
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# Deltas from gvar table have already been applied to the hmtx/vmtx. For full
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# instances (i.e. all axes pinned), we can simply drop HVAR/VVAR and return
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if set(location).issuperset(axis.axisTag for axis in fvarAxes):
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log.info("Dropping %s table", tableTag)
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del varfont[tableTag]
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return
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log.info("Instantiating %s table", tableTag)
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vhvar = varfont[tableTag].table
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varStore = vhvar.VarStore
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# since deltas were already applied, the return value here is ignored
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instantiateItemVariationStore(varStore, fvarAxes, location)
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if varStore.VarRegionList.Region:
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# Only re-optimize VarStore if the HVAR/VVAR already uses indirect AdvWidthMap
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# or AdvHeightMap. If a direct, implicit glyphID->VariationIndex mapping is
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# used for advances, skip re-optimizing and maintain original VariationIndex.
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if getattr(vhvar, tableFields.advMapping):
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varIndexMapping = varStore.optimize()
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glyphOrder = varfont.getGlyphOrder()
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_remapVarIdxMap(vhvar, tableFields.advMapping, varIndexMapping, glyphOrder)
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if getattr(vhvar, tableFields.sb1): # left or top sidebearings
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_remapVarIdxMap(vhvar, tableFields.sb1, varIndexMapping, glyphOrder)
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if getattr(vhvar, tableFields.sb2): # right or bottom sidebearings
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_remapVarIdxMap(vhvar, tableFields.sb2, varIndexMapping, glyphOrder)
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if tableTag == "VVAR" and getattr(vhvar, tableFields.vOrigMapping):
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_remapVarIdxMap(
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vhvar, tableFields.vOrigMapping, varIndexMapping, glyphOrder
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)
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else:
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del varfont[tableTag]
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def instantiateHVAR(varfont, location):
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return _instantiateVHVAR(varfont, location, varLib.HVAR_FIELDS)
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def instantiateVVAR(varfont, location):
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return _instantiateVHVAR(varfont, location, varLib.VVAR_FIELDS)
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class _TupleVarStoreAdapter(object):
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def __init__(self, regions, axisOrder, tupleVarData, itemCounts):
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self.regions = regions
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self.axisOrder = axisOrder
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self.tupleVarData = tupleVarData
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self.itemCounts = itemCounts
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@classmethod
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def fromItemVarStore(cls, itemVarStore, fvarAxes):
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axisOrder = [axis.axisTag for axis in fvarAxes]
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regions = [
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region.get_support(fvarAxes) for region in itemVarStore.VarRegionList.Region
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]
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tupleVarData = []
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itemCounts = []
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for varData in itemVarStore.VarData:
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variations = []
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varDataRegions = (regions[i] for i in varData.VarRegionIndex)
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for axes, coordinates in zip(varDataRegions, zip(*varData.Item)):
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variations.append(TupleVariation(axes, list(coordinates)))
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tupleVarData.append(variations)
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itemCounts.append(varData.ItemCount)
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return cls(regions, axisOrder, tupleVarData, itemCounts)
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def dropAxes(self, axes):
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prunedRegions = (
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frozenset(
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(axisTag, support)
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for axisTag, support in region.items()
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if axisTag not in axes
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)
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for region in self.regions
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)
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# dedup regions while keeping original order
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uniqueRegions = collections.OrderedDict.fromkeys(prunedRegions)
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self.regions = [dict(items) for items in uniqueRegions if items]
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self.axisOrder = [axisTag for axisTag in self.axisOrder if axisTag not in axes]
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def instantiate(self, location):
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defaultDeltaArray = []
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for variations, itemCount in zip(self.tupleVarData, self.itemCounts):
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defaultDeltas = instantiateTupleVariationStore(variations, location)
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if not defaultDeltas:
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defaultDeltas = [0] * itemCount
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defaultDeltaArray.append(defaultDeltas)
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# remove pinned axes from all the regions
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self.dropAxes(location.keys())
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return defaultDeltaArray
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def asItemVarStore(self):
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regionOrder = [frozenset(axes.items()) for axes in self.regions]
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varDatas = []
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for variations, itemCount in zip(self.tupleVarData, self.itemCounts):
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if variations:
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assert len(variations[0].coordinates) == itemCount
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varRegionIndices = [
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regionOrder.index(frozenset(var.axes.items())) for var in variations
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]
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varDataItems = list(zip(*(var.coordinates for var in variations)))
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varDatas.append(
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builder.buildVarData(varRegionIndices, varDataItems, optimize=False)
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)
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else:
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varDatas.append(
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builder.buildVarData([], [[] for _ in range(itemCount)])
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)
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regionList = builder.buildVarRegionList(self.regions, self.axisOrder)
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itemVarStore = builder.buildVarStore(regionList, varDatas)
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# remove unused regions from VarRegionList
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itemVarStore.prune_regions()
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return itemVarStore
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def instantiateItemVariationStore(itemVarStore, fvarAxes, location):
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""" Compute deltas at partial location, and update varStore in-place.
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Remove regions in which all axes were instanced, and scale the deltas of
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the remaining regions where only some of the axes were instanced.
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The number of VarData subtables, and the number of items within each, are
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not modified, in order to keep the existing VariationIndex valid.
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One may call VarStore.optimize() method after this to further optimize those.
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Args:
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varStore: An otTables.VarStore object (Item Variation Store)
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fvarAxes: list of fvar's Axis objects
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location: Dict[str, float] mapping axis tags to normalized axis coordinates.
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May not specify coordinates for all the fvar axes.
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Returns:
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defaultDeltas: to be added to the default instance, of type dict of floats
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keyed by VariationIndex compound values: i.e. (outer << 16) + inner.
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"""
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tupleVarStore = _TupleVarStoreAdapter.fromItemVarStore(itemVarStore, fvarAxes)
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defaultDeltaArray = tupleVarStore.instantiate(location)
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newItemVarStore = tupleVarStore.asItemVarStore()
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itemVarStore.VarRegionList = newItemVarStore.VarRegionList
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assert itemVarStore.VarDataCount == newItemVarStore.VarDataCount
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itemVarStore.VarData = newItemVarStore.VarData
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defaultDeltas = {
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((major << 16) + minor): delta
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for major, deltas in enumerate(defaultDeltaArray)
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for minor, delta in enumerate(deltas)
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}
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return defaultDeltas
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def instantiateOTL(varfont, location):
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# TODO(anthrotype) Support partial instancing of JSTF and BASE tables
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if "GDEF" not in varfont:
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return
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if "GPOS" in varfont:
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msg = "Instantiating GDEF and GPOS tables"
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else:
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msg = "Instantiating GDEF table"
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log.info(msg)
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gdef = varfont["GDEF"].table
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varStore = gdef.VarStore
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fvarAxes = varfont["fvar"].axes
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defaultDeltas = instantiateItemVariationStore(varStore, fvarAxes, location)
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# When VF are built, big lookups may overflow and be broken into multiple
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# subtables. MutatorMerger (which inherits from AligningMerger) reattaches
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# them upon instancing, in case they can now fit a single subtable (if not,
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# they will be split again upon compilation).
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# This 'merger' also works as a 'visitor' that traverses the OTL tables and
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# calls specific methods when instances of a given type are found.
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# Specifically, it adds default deltas to GPOS Anchors/ValueRecords and GDEF
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# LigatureCarets, and optionally deletes all VariationIndex tables if the
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# VarStore is fully instanced.
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merger = MutatorMerger(
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varfont, defaultDeltas, deleteVariations=(not varStore.VarRegionList.Region)
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)
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merger.mergeTables(varfont, [varfont], ["GDEF", "GPOS"])
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if varStore.VarRegionList.Region:
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varIndexMapping = varStore.optimize()
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gdef.remap_device_varidxes(varIndexMapping)
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if "GPOS" in varfont:
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varfont["GPOS"].table.remap_device_varidxes(varIndexMapping)
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else:
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# Downgrade GDEF.
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del gdef.VarStore
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gdef.Version = 0x00010002
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if gdef.MarkGlyphSetsDef is None:
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del gdef.MarkGlyphSetsDef
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gdef.Version = 0x00010000
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if not (
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gdef.LigCaretList
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or gdef.MarkAttachClassDef
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or gdef.GlyphClassDef
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or gdef.AttachList
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or (gdef.Version >= 0x00010002 and gdef.MarkGlyphSetsDef)
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):
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del varfont["GDEF"]
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|
|
|
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def instantiateFeatureVariations(varfont, location):
|
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for tableTag in ("GPOS", "GSUB"):
|
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if tableTag not in varfont or not hasattr(
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varfont[tableTag].table, "FeatureVariations"
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):
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continue
|
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log.info("Instantiating FeatureVariations of %s table", tableTag)
|
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_instantiateFeatureVariations(
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varfont[tableTag].table, varfont["fvar"].axes, location
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)
|
|
|
|
|
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def _instantiateFeatureVariations(table, fvarAxes, location):
|
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newRecords = []
|
|
pinnedAxes = set(location.keys())
|
|
featureVariationApplied = False
|
|
for record in table.FeatureVariations.FeatureVariationRecord:
|
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retainRecord = True
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|
applies = True
|
|
newConditions = []
|
|
for condition in record.ConditionSet.ConditionTable:
|
|
axisIdx = condition.AxisIndex
|
|
axisTag = fvarAxes[axisIdx].axisTag
|
|
if condition.Format == 1 and axisTag in pinnedAxes:
|
|
minValue = condition.FilterRangeMinValue
|
|
maxValue = condition.FilterRangeMaxValue
|
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v = location[axisTag]
|
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if not (minValue <= v <= maxValue):
|
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# condition not met so remove entire record
|
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retainRecord = False
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break
|
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else:
|
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applies = False
|
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newConditions.append(condition)
|
|
|
|
if retainRecord and newConditions:
|
|
record.ConditionSet.ConditionTable = newConditions
|
|
newRecords.append(record)
|
|
|
|
if applies and not featureVariationApplied:
|
|
assert record.FeatureTableSubstitution.Version == 0x00010000
|
|
for rec in record.FeatureTableSubstitution.SubstitutionRecord:
|
|
table.FeatureList.FeatureRecord[rec.FeatureIndex].Feature = rec.Feature
|
|
# Set variations only once
|
|
featureVariationApplied = True
|
|
|
|
if newRecords:
|
|
table.FeatureVariations.FeatureVariationRecord = newRecords
|
|
else:
|
|
del table.FeatureVariations
|
|
|
|
|
|
def instantiateAvar(varfont, location):
|
|
segments = varfont["avar"].segments
|
|
|
|
# drop table if we instantiate all the axes
|
|
if set(location).issuperset(segments):
|
|
log.info("Dropping avar table")
|
|
del varfont["avar"]
|
|
return
|
|
|
|
log.info("Instantiating avar table")
|
|
for axis in location:
|
|
if axis in segments:
|
|
del segments[axis]
|
|
|
|
|
|
def instantiateFvar(varfont, location):
|
|
# 'location' dict must contain user-space (non-normalized) coordinates
|
|
|
|
fvar = varfont["fvar"]
|
|
|
|
# drop table if we instantiate all the axes
|
|
if set(location).issuperset(axis.axisTag for axis in fvar.axes):
|
|
log.info("Dropping fvar table")
|
|
del varfont["fvar"]
|
|
return
|
|
|
|
log.info("Instantiating fvar table")
|
|
|
|
fvar.axes = [axis for axis in fvar.axes if axis.axisTag not in location]
|
|
|
|
# only keep NamedInstances whose coordinates == pinned axis location
|
|
instances = []
|
|
for instance in fvar.instances:
|
|
if any(instance.coordinates[axis] != value for axis, value in location.items()):
|
|
continue
|
|
for axis in location:
|
|
del instance.coordinates[axis]
|
|
instances.append(instance)
|
|
fvar.instances = instances
|
|
|
|
|
|
def instantiateSTAT(varfont, location):
|
|
pinnedAxes = set(location.keys())
|
|
|
|
stat = varfont["STAT"].table
|
|
if not stat.DesignAxisRecord:
|
|
return # skip empty STAT table
|
|
|
|
designAxes = stat.DesignAxisRecord.Axis
|
|
pinnedAxisIndices = {
|
|
i for i, axis in enumerate(designAxes) if axis.AxisTag in pinnedAxes
|
|
}
|
|
|
|
if len(pinnedAxisIndices) == len(designAxes):
|
|
log.info("Dropping STAT table")
|
|
del varfont["STAT"]
|
|
return
|
|
|
|
log.info("Instantiating STAT table")
|
|
|
|
# only keep DesignAxis that were not instanced, a build a mapping from old
|
|
# to new axis indices
|
|
newDesignAxes = []
|
|
axisIndexMap = {}
|
|
for i, axis in enumerate(designAxes):
|
|
if i not in pinnedAxisIndices:
|
|
axisIndexMap[i] = len(newDesignAxes)
|
|
newDesignAxes.append(axis)
|
|
|
|
if stat.AxisValueArray and stat.AxisValueArray.AxisValue:
|
|
# drop all AxisValue tables that reference any of the pinned axes
|
|
newAxisValueTables = []
|
|
for axisValueTable in stat.AxisValueArray.AxisValue:
|
|
if axisValueTable.Format in (1, 2, 3):
|
|
if axisValueTable.AxisIndex in pinnedAxisIndices:
|
|
continue
|
|
axisValueTable.AxisIndex = axisIndexMap[axisValueTable.AxisIndex]
|
|
newAxisValueTables.append(axisValueTable)
|
|
elif axisValueTable.Format == 4:
|
|
if any(
|
|
rec.AxisIndex in pinnedAxisIndices
|
|
for rec in axisValueTable.AxisValueRecord
|
|
):
|
|
continue
|
|
for rec in axisValueTable.AxisValueRecord:
|
|
rec.AxisIndex = axisIndexMap[rec.AxisIndex]
|
|
newAxisValueTables.append(axisValueTable)
|
|
else:
|
|
raise NotImplementedError(axisValueTable.Format)
|
|
stat.AxisValueArray.AxisValue = newAxisValueTables
|
|
stat.AxisValueCount = len(stat.AxisValueArray.AxisValue)
|
|
|
|
stat.DesignAxisRecord.Axis[:] = newDesignAxes
|
|
stat.DesignAxisCount = len(stat.DesignAxisRecord.Axis)
|
|
|
|
|
|
def normalize(value, triple, avar_mapping):
|
|
value = normalizeValue(value, triple)
|
|
if avar_mapping:
|
|
value = piecewiseLinearMap(value, avar_mapping)
|
|
# Quantize to F2Dot14, to avoid surprise interpolations.
|
|
return floatToFixedToFloat(value, 14)
|
|
|
|
|
|
def normalizeAxisLimits(varfont, axis_limits):
|
|
fvar = varfont["fvar"]
|
|
bad_limits = axis_limits.keys() - {a.axisTag for a in fvar.axes}
|
|
if bad_limits:
|
|
raise ValueError("Cannot limit: {} not present in fvar".format(bad_limits))
|
|
|
|
axes = {
|
|
a.axisTag: (a.minValue, a.defaultValue, a.maxValue)
|
|
for a in fvar.axes
|
|
if a.axisTag in axis_limits
|
|
}
|
|
|
|
avar_segments = {}
|
|
if "avar" in varfont:
|
|
avar_segments = varfont["avar"].segments
|
|
normalized_limits = {}
|
|
for axis_tag, triple in axes.items():
|
|
avar_mapping = avar_segments.get(axis_tag, None)
|
|
value = axis_limits[axis_tag]
|
|
if isinstance(value, tuple):
|
|
normalized_limits[axis_tag] = tuple(
|
|
normalize(v, triple, avar_mapping) for v in axis_limits[axis_tag]
|
|
)
|
|
else:
|
|
normalized_limits[axis_tag] = normalize(value, triple, avar_mapping)
|
|
return normalized_limits
|
|
|
|
|
|
def sanityCheckVariableTables(varfont):
|
|
if "fvar" not in varfont:
|
|
raise ValueError("Missing required table fvar")
|
|
if "gvar" in varfont:
|
|
if "glyf" not in varfont:
|
|
raise ValueError("Can't have gvar without glyf")
|
|
# TODO(anthrotype) Remove once we do support partial instancing CFF2
|
|
if "CFF2" in varfont:
|
|
raise NotImplementedError("Instancing CFF2 variable fonts is not supported yet")
|
|
|
|
|
|
def instantiateVariableFont(varfont, axis_limits, inplace=False, optimize=True):
|
|
sanityCheckVariableTables(varfont)
|
|
|
|
if not inplace:
|
|
varfont = deepcopy(varfont)
|
|
normalized_limits = normalizeAxisLimits(varfont, axis_limits)
|
|
|
|
log.info("Normalized limits: %s", normalized_limits)
|
|
|
|
# TODO Remove this check once ranges are supported
|
|
if any(isinstance(v, tuple) for v in axis_limits.values()):
|
|
raise NotImplementedError("Axes range limits are not supported yet")
|
|
|
|
if "gvar" in varfont:
|
|
instantiateGvar(varfont, normalized_limits, optimize=optimize)
|
|
|
|
if "cvar" in varfont:
|
|
instantiateCvar(varfont, normalized_limits)
|
|
|
|
if "MVAR" in varfont:
|
|
instantiateMVAR(varfont, normalized_limits)
|
|
|
|
if "HVAR" in varfont:
|
|
instantiateHVAR(varfont, normalized_limits)
|
|
|
|
if "VVAR" in varfont:
|
|
instantiateVVAR(varfont, normalized_limits)
|
|
|
|
instantiateOTL(varfont, normalized_limits)
|
|
|
|
instantiateFeatureVariations(varfont, normalized_limits)
|
|
|
|
if "avar" in varfont:
|
|
instantiateAvar(varfont, normalized_limits)
|
|
|
|
if "STAT" in varfont:
|
|
instantiateSTAT(varfont, axis_limits)
|
|
|
|
instantiateFvar(varfont, axis_limits)
|
|
|
|
return varfont
|
|
|
|
|
|
def parseLimits(limits):
|
|
result = {}
|
|
for limit_string in limits:
|
|
match = re.match(r"^(\w{1,4})=([^:]+)(?:[:](.+))?$", limit_string)
|
|
if not match:
|
|
raise ValueError("invalid location format: %r" % limit_string)
|
|
tag = match.group(1).ljust(4)
|
|
lbound = float(match.group(2))
|
|
ubound = lbound
|
|
if match.group(3):
|
|
ubound = float(match.group(3))
|
|
if lbound != ubound:
|
|
result[tag] = (lbound, ubound)
|
|
else:
|
|
result[tag] = lbound
|
|
return result
|
|
|
|
|
|
def parseArgs(args):
|
|
"""Parse argv.
|
|
|
|
Returns:
|
|
3-tuple (infile, outfile, axis_limits)
|
|
axis_limits is either a Dict[str, int], for pinning variation axes to specific
|
|
coordinates along those axes; or a Dict[str, Tuple(int, int)], meaning limit
|
|
this axis to min/max range.
|
|
Axes locations are in user-space coordinates, as defined in the "fvar" table.
|
|
"""
|
|
from fontTools import configLogger
|
|
import argparse
|
|
|
|
parser = argparse.ArgumentParser(
|
|
"fonttools varLib.instancer",
|
|
description="Partially instantiate a variable font",
|
|
)
|
|
parser.add_argument("input", metavar="INPUT.ttf", help="Input variable TTF file.")
|
|
parser.add_argument(
|
|
"locargs",
|
|
metavar="AXIS=LOC",
|
|
nargs="*",
|
|
help="List of space separated locations. A location consist in "
|
|
"the tag of a variation axis, followed by '=' and a number or"
|
|
"number:number. E.g.: wdth=100 or wght=75.0:125.0",
|
|
)
|
|
parser.add_argument(
|
|
"-o",
|
|
"--output",
|
|
metavar="OUTPUT.ttf",
|
|
default=None,
|
|
help="Output instance TTF file (default: INPUT-instance.ttf).",
|
|
)
|
|
parser.add_argument(
|
|
"--no-optimize",
|
|
dest="optimize",
|
|
action="store_false",
|
|
help="do not perform IUP optimization on the remaining gvar TupleVariations",
|
|
)
|
|
logging_group = parser.add_mutually_exclusive_group(required=False)
|
|
logging_group.add_argument(
|
|
"-v", "--verbose", action="store_true", help="Run more verbosely."
|
|
)
|
|
logging_group.add_argument(
|
|
"-q", "--quiet", action="store_true", help="Turn verbosity off."
|
|
)
|
|
options = parser.parse_args(args)
|
|
|
|
infile = options.input
|
|
outfile = (
|
|
os.path.splitext(infile)[0] + "-instance.ttf"
|
|
if not options.output
|
|
else options.output
|
|
)
|
|
configLogger(
|
|
level=("DEBUG" if options.verbose else "ERROR" if options.quiet else "INFO")
|
|
)
|
|
|
|
axis_limits = parseLimits(options.locargs)
|
|
if len(axis_limits) != len(options.locargs):
|
|
raise ValueError("Specified multiple limits for the same axis")
|
|
return (infile, outfile, axis_limits, options)
|
|
|
|
|
|
def main(args=None):
|
|
infile, outfile, axis_limits, options = parseArgs(args)
|
|
log.info("Restricting axes: %s", axis_limits)
|
|
|
|
log.info("Loading variable font")
|
|
varfont = TTFont(infile)
|
|
|
|
instantiateVariableFont(
|
|
varfont, axis_limits, inplace=True, optimize=options.optimize
|
|
)
|
|
|
|
log.info("Saving partial variable font %s", outfile)
|
|
varfont.save(outfile)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import sys
|
|
|
|
sys.exit(main())
|