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[cffLib.specializer] Simplify vsindex protocol

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This commit is contained in:
Behdad Esfahbod 2024-05-14 18:13:51 -06:00
parent 3d2df43a67
commit c22f7d5af4
1 changed files with 3 additions and 5 deletions
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8
Lib/fontTools/cffLib/specializer.py
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@ -43,10 +43,8 @@ def programToCommands(program, getNumRegions=None):
hintmask/cntrmask argument, as well as stray arguments at the end of the hintmask/cntrmask argument, as well as stray arguments at the end of the
program (🤷). program (🤷).
'getNumRegions' may be None, or a callable object. It must return the 'getNumRegions' may be None, or a callable object. It must return the
number of regions. 'getNumRegions' takes a single argument, vsindex. If number of regions. 'getNumRegions' takes a single argument, vsindex. It
the vsindex argument is None, getNumRegions returns the default number returns the numRegions for the vsindex.
of regions for the charstring, else it returns the numRegions for
the vsindex.
The Charstring may or may not start with a width value. If the first The Charstring may or may not start with a width value. If the first
non-blend operator has an odd number of arguments, then the first argument is non-blend operator has an odd number of arguments, then the first argument is
a width, and is popped off. This is complicated with blend operators, as a width, and is popped off. This is complicated with blend operators, as
@ -61,7 +59,7 @@ def programToCommands(program, getNumRegions=None):
""" """
seenWidthOp = False seenWidthOp = False
vsIndex = None vsIndex = 0
lenBlendStack = 0 lenBlendStack = 0
lastBlendIndex = 0 lastBlendIndex = 0
commands = [] commands = []