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[subset] Fix subsetting of Khmer fonts

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This commit is contained in:
Behdad Esfahbod 2013-12-16 20:52:52 -05:00
parent 522cd11d51
commit 0be386edb5
1 changed files with 6 additions and 1 deletions
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7
Lib/fontTools/subset.py
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@ -919,8 +919,13 @@ def collect_lookups(self):
@_add_method(otTables.FeatureList) @_add_method(otTables.FeatureList)
def subset_lookups(self, lookup_indices): def subset_lookups(self, lookup_indices):
"Returns the indices of nonempty features." "Returns the indices of nonempty features."
# Note: Never ever drop feature 'pref', even if it's empty.
# HarfBuzz chooses shaper for Khmer based on presence of this
# feature. See thread at:
# http://lists.freedesktop.org/archives/harfbuzz/2012-November/002660.html
feature_indices = [i for i,f in enumerate(self.FeatureRecord) feature_indices = [i for i,f in enumerate(self.FeatureRecord)
if f.Feature.subset_lookups(lookup_indices)] if (f.Feature.subset_lookups(lookup_indices) or
f.FeatureTag == 'pref')]
self.subset_features(feature_indices) self.subset_features(feature_indices)
return feature_indices return feature_indices