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[subset] only prune codepage ranges for OS/2.version >= 1

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Fixes #3334
This commit is contained in:
Cosimo Lupo 2023-11-15 12:17:43 +00:00
parent 441228e85a
commit 49bd8adbc4
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1 changed files with 3 additions and 1 deletions
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4
Lib/fontTools/subset/__init__.py
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@ -3455,7 +3455,9 @@ class Subsetter(object):
log.info(
"%s Unicode ranges pruned: %s", tag, sorted(new_uniranges)
)
if self.options.prune_codepage_ranges:
if self.options.prune_codepage_ranges and font[tag].version >= 1:
# codepage range fields were added with OS/2 format 1
# https://learn.microsoft.com/en-us/typography/opentype/spec/os2#version-1
old_codepages = font[tag].getCodePageRanges()
new_codepages = font[tag].recalcCodePageRanges(font, pruneOnly=True)
if old_codepages != new_codepages: