[cu2quPen] Add Cu2QuMultiPen
diff --git a/Lib/fontTools/pens/cu2quPen.py b/Lib/fontTools/pens/cu2quPen.py
index a4764ec..cabbbe7 100644
--- a/Lib/fontTools/pens/cu2quPen.py
+++ b/Lib/fontTools/pens/cu2quPen.py
@@ -12,7 +12,7 @@
# See the License for the specific language governing permissions and
# limitations under the License.
-from fontTools.cu2qu import curve_to_quadratic
+from fontTools.cu2qu import curve_to_quadratic, curves_to_quadratic
from fontTools.pens.basePen import AbstractPen, decomposeSuperBezierSegment
from fontTools.pens.reverseContourPen import ReverseContourPen
from fontTools.pens.pointPen import BasePointToSegmentPen
@@ -258,3 +258,82 @@
def addComponent(self, baseGlyphName, transformation):
assert self.currentPath is None
self.pen.addComponent(baseGlyphName, transformation)
+
+
+
+class Cu2QuMultiPen:
+
+ def __init__(self, other_pens, max_err, reverse_direction=False):
+ if reverse_direction:
+ other_pens = [ReverseContourPen(pen) for pen in other_pens]
+ self.pens = other_pens
+ self.max_err = max_err
+ self.start_pts = None
+ self.current_pts = None
+
+ def _check_contour_is_open(self):
+ if self.current_pts is None:
+ raise AssertionError("moveTo is required")
+
+ def _check_contour_is_closed(self):
+ if self.current_pts is not None:
+ raise AssertionError("closePath or endPath is required")
+
+ def _add_moveTo(self):
+ if self.start_pts is not None:
+ for pt,pen in zip(self.start_pts, self.pens):
+ pen.moveTo(*pt)
+ self.start_pts = None
+
+ def moveTo(self, pts):
+ self._check_contour_is_closed()
+ self.start_pts = self.current_pts = pts
+ self._add_moveTo()
+
+ def lineTo(self, pts):
+ self._check_contour_is_open()
+ self._add_moveTo()
+ for pt,pen in zip(pts, self.pens):
+ pen.lineTo(*pt)
+ self.current_pts = pts
+
+ def qCurveTo(self, pointsList):
+ self._check_contour_is_open()
+ self._add_moveTo()
+ self.current_pt = []
+ for points,pen in zip(pointsList, self.pens):
+ pen.qCurveTo(*points)
+ self.current_pt.append(points[-1])
+
+ def _curves_to_quadratic(self, pointsList):
+ curves = []
+ for current_pt,points in zip(self.current_pts, pointsList):
+ curves.append((current_pt) + points)
+ quadratics = curves_to_quadratic(curves, [self.max_err] * len(curves))
+ pointsList = []
+ for quadratic in quadratics:
+ pointsList.append(quadratic[1:])
+ self.qCurveTo(pointsList)
+
+ def curveTo(self, pointsList):
+ self._check_contour_is_open()
+ self._curves_to_quadratic(pointsList)
+
+ def closePath(self):
+ self._check_contour_is_open()
+ if self.start_pts is None:
+ for pen in self.pens:
+ pen.closePath()
+ self.current_pts = self.start_pts = None
+
+ def endPath(self):
+ self._check_contour_is_open()
+ if self.start_pts is None:
+ for pen in self.pens:
+ pen.endPath()
+ self.current_pts = self.start_pts = None
+
+ def addComponent(self, glyphName, transformations):
+ self._check_contour_is_closed()
+ for trans,pen in zip(transformations, self.pens):
+ pen.addComponent(glyphName, trans)
