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Diffstat (limited to 'Tests/ttLib/removeOverlaps_test.py')
-rw-r--r-- | Tests/ttLib/removeOverlaps_test.py | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/Tests/ttLib/removeOverlaps_test.py b/Tests/ttLib/removeOverlaps_test.py new file mode 100644 index 00000000..1320c9be --- /dev/null +++ b/Tests/ttLib/removeOverlaps_test.py @@ -0,0 +1,51 @@ +import logging +import pytest + +pathops = pytest.importorskip("pathops") + +from fontTools.ttLib.removeOverlaps import _simplify, _round_path + + +def test_pathops_simplify_bug_workaround(caplog): + # Paths extracted from Noto Sans Ethiopic instance that fails skia-pathops + # https://github.com/google/fonts/issues/3365 + # https://bugs.chromium.org/p/skia/issues/detail?id=11958 + path = pathops.Path() + path.moveTo(550.461, 0) + path.lineTo(550.461, 366.308) + path.lineTo(713.229, 366.308) + path.lineTo(713.229, 0) + path.close() + path.moveTo(574.46, 0) + path.lineTo(574.46, 276.231) + path.lineTo(737.768, 276.231) + path.quadTo(820.075, 276.231, 859.806, 242.654) + path.quadTo(899.537, 209.077, 899.537, 144.154) + path.quadTo(899.537, 79, 853.46, 39.5) + path.quadTo(807.383, 0, 712.383, 0) + path.close() + + # check that it fails without workaround + with pytest.raises(pathops.PathOpsError): + pathops.simplify(path) + + # check our workaround works (but with a warning) + with caplog.at_level(logging.DEBUG, logger="fontTools.ttLib.removeOverlaps"): + result = _simplify(path, debugGlyphName="a") + + assert "skia-pathops failed to simplify 'a' with float coordinates" in caplog.text + + expected = pathops.Path() + expected.moveTo(550, 0) + expected.lineTo(550, 366) + expected.lineTo(713, 366) + expected.lineTo(713, 276) + expected.lineTo(738, 276) + expected.quadTo(820, 276, 860, 243) + expected.quadTo(900, 209, 900, 144) + expected.quadTo(900, 79, 853, 40) + expected.quadTo(807.242, 0.211, 713, 0.001) + expected.lineTo(713, 0) + expected.close() + + assert expected == _round_path(result, round=lambda v: round(v, 3)) |