102 lines
3.1 KiB
Python
102 lines
3.1 KiB
Python
from fontTools.pens.filterPen import ContourFilterPen
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class ExplicitClosingLinePen(ContourFilterPen):
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"""A filter pen that adds an explicit lineTo to the first point of each closed
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contour if the end point of the last segment is not already the same as the first point.
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Otherwise, it passes the contour through unchanged.
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>>> from pprint import pprint
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>>> from fontTools.pens.recordingPen import RecordingPen
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.lineTo((100, 0))
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>>> pen.lineTo((100, 100))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('lineTo', ((100, 0),)),
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('lineTo', ((100, 100),)),
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('lineTo', ((0, 0),)),
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('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.lineTo((100, 0))
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>>> pen.lineTo((100, 100))
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>>> pen.lineTo((0, 0))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('lineTo', ((100, 0),)),
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('lineTo', ((100, 100),)),
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('lineTo', ((0, 0),)),
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('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.curveTo((100, 0), (0, 100), (100, 100))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('curveTo', ((100, 0), (0, 100), (100, 100))),
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('lineTo', ((0, 0),)),
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('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.curveTo((100, 0), (0, 100), (100, 100))
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>>> pen.lineTo((0, 0))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('curveTo', ((100, 0), (0, 100), (100, 100))),
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('lineTo', ((0, 0),)),
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('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.curveTo((100, 0), (0, 100), (0, 0))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('curveTo', ((100, 0), (0, 100), (0, 0))),
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('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)), ('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.closePath()
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>>> pprint(rec.value)
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[('closePath', ())]
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>>> rec = RecordingPen()
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>>> pen = ExplicitClosingLinePen(rec)
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>>> pen.moveTo((0, 0))
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>>> pen.lineTo((100, 0))
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>>> pen.lineTo((100, 100))
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>>> pen.endPath()
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>>> pprint(rec.value)
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[('moveTo', ((0, 0),)),
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('lineTo', ((100, 0),)),
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('lineTo', ((100, 100),)),
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('endPath', ())]
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"""
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def filterContour(self, contour):
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if (
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not contour
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or contour[0][0] != "moveTo"
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or contour[-1][0] != "closePath"
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or len(contour) < 3
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):
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return
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movePt = contour[0][1][0]
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lastSeg = contour[-2][1]
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if lastSeg and movePt != lastSeg[-1]:
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contour[-1:] = [("lineTo", (movePt,)), ("closePath", ())]
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