def _deep_copy_contours(self, ufo, parent, component, transformation):
"""Copy contours from component to parent, including nested components."""
for nested in component.components:
self._deep_copy_contours(
ufo, parent, ufo[nested.baseGlyph],
transformation.transform(nested.transformation))
if component != parent:
pen = TransformPen(parent.getPen(), transformation)
# if the transformation has a negative determinant, it will reverse
# the contour direction of the component
xx, xy, yx, yy = transformation[:4]
if xx * yy - xy * yx < 0:
pen = ReverseContourPen(pen)
component.draw(pen)
def _set_segments(glyph, segments, reverse_direction):
"""Draw segments as extracted by GetSegmentsPen back to a glyph."""
glyph.clearContours()
pen = glyph.getPen()
if reverse_direction:
pen = ReverseContourPen(pen)
for tag, args in segments:
if tag == 'move':
pen.moveTo(*args)
elif tag == 'line':
pen.lineTo(*args)
elif tag == 'qcurve':
pen.qCurveTo(*args[1:])
elif tag == 'close':
pen.closePath()
elif tag == 'end':
pen.endPath()
else:
raise AssertionError('Unhandled segment type "%s"' % tag)
def _set_segments(glyph, segments, reverse_direction):
"""Draw segments as extracted by GetSegmentsPen back to a glyph."""
glyph.clearContours()
pen = glyph.getPen()
if reverse_direction:
pen = ReverseContourPen(pen)
for tag, args in segments:
if tag == 'move':
pen.moveTo(*args)
elif tag == 'line':
pen.lineTo(*args)
elif tag == 'qcurve':
pen.qCurveTo(*args[1:])
elif tag == 'close':
pen.closePath()
elif tag == 'end':
pen.endPath()
else:
raise AssertionError('Unhandled segment type "%s"' % tag)