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[VARC] Make HAVE_VARIATIONS flag automatic

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This commit is contained in:
Behdad Esfahbod 2023-12-20 00:15:34 -07:00
parent b772f1d686
commit f7337b55af
1 changed files with 6 additions and 4 deletions
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10
Lib/fontTools/ttLib/tables/otTables.py
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@ -97,6 +97,7 @@ class VarTransform:
if flags & VarTransformFlags.HAVE_VARIATIONS: if flags & VarTransformFlags.HAVE_VARIATIONS:
self.varIndex = struct.unpack(">L", data[i : i + 4])[0] self.varIndex = struct.unpack(">L", data[i : i + 4])[0]
i += 4 i += 4
flags = flags & ~VarTransformFlags.HAVE_VARIATIONS
def read_transform_component(data, values): def read_transform_component(data, values):
nonlocal i nonlocal i
@ -141,10 +142,11 @@ class VarTransform:
else: else:
flags = self.flags flags = self.flags
data.append(struct.pack(">H", flags)) if self.varIndex != NO_VARIATION_INDEX:
if flags & VarTransformFlags.HAVE_VARIATIONS:
data.append(struct.pack(">L", self.varIndex)) data.append(struct.pack(">L", self.varIndex))
flags |= VarTransformFlags.HAVE_VARIATIONS
else:
flags &= ~VarTransformFlags.HAVE_VARIATIONS
def write_transform_component(value, values): def write_transform_component(value, values):
if flags & values.flag: if flags & values.flag:
@ -158,7 +160,7 @@ class VarTransform:
value = getattr(self.transform, attr_name) value = getattr(self.transform, attr_name)
data.append(write_transform_component(value, mapping_values)) data.append(write_transform_component(value, mapping_values))
return bytesjoin(data) return struct.pack(">H", flags) + bytesjoin(data)
def toXML(self, writer, ttFont, attrs, name): def toXML(self, writer, ttFont, attrs, name):
if self.varIndex != NO_VARIATION_INDEX: if self.varIndex != NO_VARIATION_INDEX: