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[varLib.interpolatable] Warn if only one master was found

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Motivated by https://github.com/fonttools/fonttools/issues/3666
This commit is contained in:
Behdad Esfahbod 2024-10-21 15:56:26 -06:00
parent 269321387b
commit 885d7c1ecb
1 changed files with 10 additions and 5 deletions
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11
Lib/fontTools/varLib/interpolatable.py
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@ -693,7 +693,7 @@ def main(args=None):
from fontTools import configLogger from fontTools import configLogger
configLogger(level=("INFO" if args.verbose else "ERROR")) configLogger(level=("INFO" if args.verbose else "WARNING"))
if args.debug: if args.debug:
configLogger(level="DEBUG") configLogger(level="DEBUG")
@ -750,13 +750,13 @@ def main(args=None):
for k, vv in axis_triples.items() for k, vv in axis_triples.items()
} }
elif args.inputs[0].endswith(".ttf"): elif args.inputs[0].endswith(".ttf") or args.inputs[0].endswith(".otf"):
from fontTools.ttLib import TTFont from fontTools.ttLib import TTFont
# Is variable font?
font = TTFont(args.inputs[0]) font = TTFont(args.inputs[0])
upem = font["head"].unitsPerEm upem = font["head"].unitsPerEm
if "gvar" in font: if "gvar" in font:
# Is variable font
fvar = font["fvar"] fvar = font["fvar"]
axisMapping = {} axisMapping = {}
@ -830,6 +830,7 @@ def main(args=None):
names.append(name) names.append(name)
fonts.append(glyphsets[locTuple]) fonts.append(glyphsets[locTuple])
locations.append(dict(locTuple)) locations.append(dict(locTuple))
args.ignore_missing = True args.ignore_missing = True
args.inputs = [] args.inputs = []
@ -854,6 +855,10 @@ def main(args=None):
names.append(basename(filename).rsplit(".", 1)[0]) names.append(basename(filename).rsplit(".", 1)[0])
if len(fonts) < 2:
log.warning("Font file does not seem to be variable. Nothing to check.")
return
glyphsets = [] glyphsets = []
for font in fonts: for font in fonts:
if hasattr(font, "getGlyphSet"): if hasattr(font, "getGlyphSet"):