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from fontTools.misc.roundTools import otRound
from fontTools.misc.transform import Transform
from fontTools.pens.filterPen import FilterPen, FilterPointPen
__all__ = ["RoundingPen", "RoundingPointPen"]
class RoundingPen(FilterPen):
"""
Filter pen that rounds point coordinates and component XY offsets to integer.
>>> from fontTools.pens.recordingPen import RecordingPen
>>> recpen = RecordingPen()
>>> roundpen = RoundingPen(recpen)
>>> roundpen.moveTo((0.4, 0.6))
>>> roundpen.lineTo((1.6, 2.5))
>>> roundpen.qCurveTo((2.4, 4.6), (3.3, 5.7), (4.9, 6.1))
>>> roundpen.curveTo((6.4, 8.6), (7.3, 9.7), (8.9, 10.1))
>>> roundpen.addComponent("a", (1.5, 0, 0, 1.5, 10.5, -10.5))
>>> recpen.value == [
... ('moveTo', ((0, 1),)),
... ('lineTo', ((2, 3),)),
... ('qCurveTo', ((2, 5), (3, 6), (5, 6))),
... ('curveTo', ((6, 9), (7, 10), (9, 10))),
... ('addComponent', ('a', (1.5, 0, 0, 1.5, 11, -10))),
... ]
True
"""
def __init__(self, outPen, roundFunc=otRound):
super().__init__(outPen)
self.roundFunc = roundFunc
def moveTo(self, pt):
self._outPen.moveTo((self.roundFunc(pt[0]), self.roundFunc(pt[1])))
def lineTo(self, pt):
self._outPen.lineTo((self.roundFunc(pt[0]), self.roundFunc(pt[1])))
def curveTo(self, *points):
self._outPen.curveTo(
*((self.roundFunc(x), self.roundFunc(y)) for x, y in points)
)
def qCurveTo(self, *points):
self._outPen.qCurveTo(
*((self.roundFunc(x), self.roundFunc(y)) for x, y in points)
)
def addComponent(self, glyphName, transformation):
self._outPen.addComponent(
glyphName,
Transform(
*transformation[:4],
self.roundFunc(transformation[4]),
self.roundFunc(transformation[5]),
),
)
class RoundingPointPen(FilterPointPen):
"""
Filter point pen that rounds point coordinates and component XY offsets to integer.
>>> from fontTools.pens.recordingPen import RecordingPointPen
>>> recpen = RecordingPointPen()
>>> roundpen = RoundingPointPen(recpen)
>>> roundpen.beginPath()
>>> roundpen.addPoint((0.4, 0.6), 'line')
>>> roundpen.addPoint((1.6, 2.5), 'line')
>>> roundpen.addPoint((2.4, 4.6))
>>> roundpen.addPoint((3.3, 5.7))
>>> roundpen.addPoint((4.9, 6.1), 'qcurve')
>>> roundpen.endPath()
>>> roundpen.addComponent("a", (1.5, 0, 0, 1.5, 10.5, -10.5))
>>> recpen.value == [
... ('beginPath', (), {}),
... ('addPoint', ((0, 1), 'line', False, None), {}),
... ('addPoint', ((2, 3), 'line', False, None), {}),
... ('addPoint', ((2, 5), None, False, None), {}),
... ('addPoint', ((3, 6), None, False, None), {}),
... ('addPoint', ((5, 6), 'qcurve', False, None), {}),
... ('endPath', (), {}),
... ('addComponent', ('a', (1.5, 0, 0, 1.5, 11, -10)), {}),
... ]
True
"""
def __init__(self, outPen, roundFunc=otRound):
super().__init__(outPen)
self.roundFunc = roundFunc
def addPoint(self, pt, segmentType=None, smooth=False, name=None, **kwargs):
self._outPen.addPoint(
(self.roundFunc(pt[0]), self.roundFunc(pt[1])),
segmentType=segmentType,
smooth=smooth,
name=name,
**kwargs,
)
def addComponent(self, baseGlyphName, transformation, **kwargs):
self._outPen.addComponent(
baseGlyphName,
Transform(
*transformation[:4],
self.roundFunc(transformation[4]),
self.roundFunc(transformation[5]),
),
**kwargs,
)
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