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[varLib] Round outline deltas using banker's round as well

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See https://github.com/fonttools/fonttools/pull/2214#issuecomment-790742479
This commit is contained in:
Behdad Esfahbod 2021-03-04 13:00:04 -07:00
parent 07a7dd3eb5
commit d56b844142
2 changed files with 4 additions and 3 deletions
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2
Lib/fontTools/misc/vector.py
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@ -71,7 +71,7 @@ class Vector(tuple):
def __neg__(self):
return self._unaryOp(operator.neg)
def __round__(self):
def __round__(self, *, round=round):
return self._unaryOp(round)
def __eq__(self, other):

5
Lib/fontTools/varLib/__init__.py
View File

@ -34,6 +34,7 @@ from fontTools.varLib.mvar import MVAR_ENTRIES
from fontTools.varLib.iup import iup_delta_optimize
from fontTools.varLib.featureVars import addFeatureVariations
from fontTools.designspaceLib import DesignSpaceDocument
from functools import partial
from collections import OrderedDict, namedtuple
import os.path
import logging
@ -253,7 +254,7 @@ def _add_gvar(font, masterModel, master_ttfs, tolerance=0.5, optimize=True):
# Update gvar
gvar.variations[glyph] = []
deltas = model.getDeltas(allCoords, round=round) # builtin round calls into GlyphCoordinates.__round__()
deltas = model.getDeltas(allCoords, round=partial(GlyphCoordinates.__round__, round=round))
supports = model.supports
assert len(deltas) == len(supports)
@ -363,7 +364,7 @@ def _merge_TTHinting(font, masterModel, master_ttfs):
return
variations = []
deltas, supports = masterModel.getDeltasAndSupports(all_cvs, round=round) # builtin round calls into Vector.__round__
deltas, supports = masterModel.getDeltasAndSupports(all_cvs, round=round) # builtin round calls into Vector.__round__, which uses builtin round as we like
for i,(delta,support) in enumerate(zip(deltas[1:], supports[1:])):
if all(v == 0 for v in delta):
continue