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[otConverters] Support read/write of 32bit VarStore

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Part of https://github.com/fonttools/fonttools/issues/2279
This commit is contained in:
Behdad Esfahbod 2021-05-01 12:50:00 -06:00
parent a2f34fdf82
commit 802e3636bc
1 changed files with 23 additions and 5 deletions
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28
Lib/fontTools/ttLib/tables/otConverters.py
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@ -1622,9 +1622,18 @@ class VarDataValue(BaseConverter):
regionCount = tableDict["VarRegionCount"]
wordCount = tableDict["NumShorts"]
# https://github.com/fonttools/fonttools/issues/2279
longWords = bool(wordCount & 0x8000)
wordCount = wordCount & 0x7FFF
(readBigArray, readSmallArray) = {
False: (reader.readShortArray, reader.readInt8Array),
True: (reader.readLongArray, reader.readShortArray),
}[longWords]
n1, n2 = min(regionCount, wordCount), max(regionCount, wordCount)
values.extend(reader.readShortArray(n1))
values.extend(reader.readInt8Array(n2 - n1))
values.extend(readBigArray(n1))
values.extend(readSmallArray(n2 - n1))
if n2 > regionCount: # Padding
del values[regionCount:]
@ -1634,11 +1643,20 @@ class VarDataValue(BaseConverter):
regionCount = tableDict["VarRegionCount"]
wordCount = tableDict["NumShorts"]
# https://github.com/fonttools/fonttools/issues/2279
longWords = bool(wordCount & 0x8000)
wordCount = wordCount & 0x7FFF
(writeBigArray, writeSmallArray) = {
False: (writer.writeShortArray, writer.writeInt8Array),
True: (writer.writeLongArray, writer.writeShortArray),
}[longWords]
n1, n2 = min(regionCount, wordCount), max(regionCount, wordCount)
writer.writeShortArray(values[:n1])
writer.writeInt8Array(values[n1:regionCount])
writeBigArray(values[:n1])
writeSmallArray(values[n1:regionCount])
if n2 > regionCount: # Padding
writer.writeInt8Array([0] * (n2 - regionCount))
writer.writeSmallArray([0] * (n2 - regionCount))
def xmlWrite(self, xmlWriter, font, value, name, attrs):
xmlWriter.simpletag(name, attrs + [("value", value)])