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add option to skip glyphDataFormat check for speed

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If one is certain that the glyph data has compatible format and prefers not to wait for each glyph flag to checked...
This commit is contained in:
Cosimo Lupo 2023-05-23 13:16:02 +01:00
parent 9bb3b652b0
commit 469c9ad963
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GPG Key ID: DF65A8A5A119C9A8
2 changed files with 8 additions and 5 deletions
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9
Lib/fontTools/fontBuilder.py
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@ -648,7 +648,7 @@ class FontBuilder(object):
for fontDict in topDict.FDArray:
fontDict.Private.vstore = vstore
def setupGlyf(self, glyphs, calcGlyphBounds=True):
def setupGlyf(self, glyphs, calcGlyphBounds=True, checkFormat=True):
"""Create the `glyf` table from a dict, that maps glyph names
to `fontTools.ttLib.tables._g_l_y_f.Glyph` objects, for example
as made by `fontTools.pens.ttGlyphPen.TTGlyphPen`.
@ -657,13 +657,12 @@ class FontBuilder(object):
calculated. Only pass False if your glyph objects already have
their bounding box values set.
Raises ValueError if any of the glyphs contains cubic curves or is a variable
composite but the `head` table has `glyphDataFormat` set to 0 (instead of 1).
If `checkFormat` is True, raise ValueError if any of the glyphs contains
cubic curves or is a variable composite but head.glyphDataFormat=0.
"""
assert self.isTTF
glyphDataFormat = self.font["head"].glyphDataFormat
if glyphDataFormat == 0:
if checkFormat and self.font["head"].glyphDataFormat == 0:
for name, g in glyphs.items():
if g.isVarComposite():
raise ValueError(

4
Tests/fontBuilder/fontBuilder_test.py
View File

@ -145,12 +145,16 @@ def test_build_cubic_ttf(tmp_path):
glyph = pen.glyph()
glyphs = {"A": glyph}
# cubic outlines are not allowed in glyf table format 0
fb = FontBuilder(1000, isTTF=True, glyphDataFormat=0)
with pytest.raises(
ValueError, match="Glyph 'A' has cubic Bezier outlines, but glyphDataFormat=0"
):
fb.setupGlyf(glyphs)
# can skip check if feeling adventurous
fb.setupGlyf(glyphs, checkFormat=False)
# cubics are (will be) allowed in glyf table format 1
fb = FontBuilder(1000, isTTF=True, glyphDataFormat=1)
fb.setupGlyf(glyphs)
assert "A" in fb.font["glyf"].glyphs