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[varStore] Add optional quantization to optimize()

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This commit is contained in:
Behdad Esfahbod 2023-05-24 17:34:39 -06:00
parent 47813b217c
commit 311bda2021
1 changed files with 9 additions and 3 deletions
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12
Lib/fontTools/varLib/varStore.py
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@ -470,7 +470,7 @@ class _EncodingDict(dict):
return chars
def VarStore_optimize(self, use_NO_VARIATION_INDEX=True):
def VarStore_optimize(self, use_NO_VARIATION_INDEX=True, quantization=1):
"""Optimize storage. Returns mapping from old VarIdxes to new ones."""
# Overview:
@ -551,8 +551,14 @@ def VarStore_optimize(self, use_NO_VARIATION_INDEX=True):
for minor, item in enumerate(data.Item):
row = list(zeroes)
for regionIdx, v in zip(regionIndices, item):
row[regionIdx] += v
if quantization == 1:
for regionIdx, v in zip(regionIndices, item):
row[regionIdx] += v
else:
for regionIdx, v in zip(regionIndices, item):
row[regionIdx] += v // quantization * quantization
row = tuple(row)
if use_NO_VARIATION_INDEX and not any(row):