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[cffLib.specializer] Leave 1 stack free area for subroutinizer use

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This commit is contained in:
Kunihiko Sakamoto 2018-07-25 17:29:27 +09:00
parent d3229d5777
commit 41a21cce27
1 changed files with 3 additions and 1 deletions
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4
Lib/fontTools/cffLib/specializer.py
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@ -493,7 +493,9 @@ def specializeCommands(commands,
if d0 is None: continue
new_op = d0+d+'curveto'
if new_op and len(args1) + len(args2) <= maxstack:
# Make sure the stack depth does not exceed (maxstack - 1), so
# that subroutinizer can insert subroutine calls at any point.
if new_op and len(args1) + len(args2) <= maxstack - 1:
commands[i-1] = (new_op, args1+args2)
del commands[i]