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[CFFToCFF2] Allow fdIndex==0

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This commit is contained in:
Behdad Esfahbod 2024-05-27 15:18:05 -06:00
parent 7fadfa4e81
commit 2225c84a1b
1 changed files with 4 additions and 2 deletions
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6
Lib/fontTools/cffLib/CFFToCFF2.py
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@ -81,7 +81,7 @@ def _convertCFFToCFF2(cff, otFont):
thisLocalSubrs = (
localSubrs[fdIndex]
if fdIndex
if fdIndex is not None
else (
getattr(topDict.Private, "Subrs", [])
if hasattr(topDict, "Private")
@ -104,9 +104,10 @@ def _convertCFFToCFF2(cff, otFont):
# just pop the first number since it may be a subroutine call.
# Instead, when seeing that, we embed the subroutine and recurse.
# If this ever happened, we later prune unused subroutines.
while program[1] in ["callsubr", "callgsubr"]:
while len(program) >= 2 and program[1] in ["callsubr", "callgsubr"]:
removeUnusedSubrs = True
subrNumber = program.pop(0)
assert isinstance(subrNumber, int), subrNumber
op = program.pop(0)
bias = extractor.localBias if op == "callsubr" else extractor.globalBias
subrNumber += bias
@ -114,6 +115,7 @@ def _convertCFFToCFF2(cff, otFont):
subrProgram = subrSet[subrNumber].program
program[:0] = subrProgram
# Now pop the actual width
assert len(program) >= 1, program
program.pop(0)
if program and program[-1] == "endchar":