Source code for fontTools.pens.transformPen
from fontTools.misc.py23 import *
from fontTools.pens.filterPen import FilterPen
__all__ = ["TransformPen"]
[docs]class TransformPen(FilterPen):
"""Pen that transforms all coordinates using a Affine transformation,
and passes them to another pen.
"""
def __init__(self, outPen, transformation):
"""The 'outPen' argument is another pen object. It will receive the
transformed coordinates. The 'transformation' argument can either
be a six-tuple, or a fontTools.misc.transform.Transform object.
"""
super(TransformPen, self).__init__(outPen)
if not hasattr(transformation, "transformPoint"):
from fontTools.misc.transform import Transform
transformation = Transform(*transformation)
self._transformation = transformation
self._transformPoint = transformation.transformPoint
self._stack = []
[docs] def qCurveTo(self, *points):
if points[-1] is None:
points = self._transformPoints(points[:-1]) + [None]
else:
points = self._transformPoints(points)
self._outPen.qCurveTo(*points)
def _transformPoints(self, points):
transformPoint = self._transformPoint
return [transformPoint(pt) for pt in points]
[docs] def addComponent(self, glyphName, transformation):
transformation = self._transformation.transform(transformation)
self._outPen.addComponent(glyphName, transformation)
if __name__ == "__main__":
from fontTools.pens.basePen import _TestPen
pen = TransformPen(_TestPen(None), (2, 0, 0.5, 2, -10, 0))
pen.moveTo((0, 0))
pen.lineTo((0, 100))
pen.curveTo((50, 75), (60, 50), (50, 25), (0, 0))
pen.closePath()