def __init__(self, other_point_pen, max_err, reverse_direction=False,
stats=None):
BasePointToSegmentPen.__init__(self)
if reverse_direction:
self.pen = ReverseContourPointPen(other_point_pen)
else:
self.pen = other_point_pen
self.max_err = max_err
self.stats = stats
def test_line(self):
tpen = _TestPointPen()
pen = ReverseContourPointPen(tpen)
pen.beginPath()
pen.addPoint((0, 0), segmentType="move")
pen.addPoint((0, 100), segmentType="line")
pen.endPath()
self.assertEqual(
"beginPath() "
"addPoint((0, 100), segmentType='move') "
"addPoint((0, 0), segmentType='line') "
"endPath()", repr(tpen))
def drawPoints(self, pointPen):
if self.drawInner:
reversePen = ReverseContourPointPen(pointPen)
self.innerGlyph.drawPoints(CleanPointPen(reversePen))
if self.drawOuter:
self.outerGlyph.drawPoints(CleanPointPen(pointPen))
if self.drawOriginal:
if self.drawOuter:
pointPen = ReverseContourPointPen(pointPen)
self.originalGlyph.drawPoints(CleanPointPen(pointPen))
for glyphName, transform in self.components:
pointPen.addComponent(glyphName, transform)
def reverse(self):
"""
Reverse the direction of the contour. It's important to note
that the actual points stored in this object will be completely
repalced by new points.
This will post *Contour.WindingDirectionChanged*,
*Contour.PointsChanged* and *Contour.Changed* notifications.
"""
from fontTools.pens.pointPen import ReverseContourPointPen
oldDirection = self.clockwise
# put the current points in another contour
otherContour = self.__class__(glyph=None, pointClass=self.pointClass)
# draw the points in this contour through
# the reversing pen.
reversePen = ReverseContourPointPen(otherContour)
self.drawPoints(reversePen)
# clear the points in this contour
self._clear(postNotification=False)
# set the points back into this contour
self._points = otherContour._points
# post a notification
self.postNotification("Contour.WindingDirectionChanged",
data=dict(oldValue=oldDirection,
newValue=self.clockwise))
self.postNotification("Contour.PointsChanged")
self.dirty = True
def reverseContours(glyph):
glyphCopy = RGlyph()
glyphCopy.width = glyph.width
pointPen = glyphCopy.getPointPen()
reversePen = ReverseContourPointPen(pointPen)
glyph.drawPoints(reversePen)
return glyphCopy
def test_closed_line_overlapping_start_end_points(self):
# Test case from https://github.com/googlefonts/fontmake/issues/572
tpen = _TestPointPen()
pen = ReverseContourPointPen(tpen)
pen.beginPath()
pen.addPoint((0, 651), segmentType="line")
pen.addPoint((0, 101), segmentType="line")
pen.addPoint((0, 101), segmentType="line")
pen.addPoint((0, 651), segmentType="line")
pen.endPath()
self.assertEqual(
"beginPath() "
"addPoint((0, 651), segmentType='line') "
"addPoint((0, 651), segmentType='line') "
"addPoint((0, 101), segmentType='line') "
"addPoint((0, 101), segmentType='line') "
"endPath()", repr(tpen))
def _copyGlyph(glyph, glyphFactory=None, reverseContour=False):
# copy everything except unused attributes: 'guidelines', 'note', 'image'
if glyphFactory is None:
glyphFactory = _getNewGlyphFactory(glyph)
copy = glyphFactory(glyph.name)
copy.width = glyph.width
copy.height = glyph.height
copy.unicodes = list(glyph.unicodes)
copy.anchors = [dict(a) for a in glyph.anchors]
copy.lib = deepcopy(glyph.lib)
pointPen = copy.getPointPen()
if reverseContour:
from fontTools.pens.pointPen import ReverseContourPointPen
pointPen = ReverseContourPointPen(pointPen)
glyph.drawPoints(pointPen)
return copy
def getReversePen(self):
adapterPen = PointToSegmentPen(self.otherPen)
reversePen = ReverseContourPointPen(adapterPen)
return SegmentToPointPen(reversePen)
class Cu2QuPointPen(BasePointToSegmentPen):
""" A filter pen to convert cubic bezier curves to quadratic b-splines
using the RoboFab PointPen protocol.
Args:
other_point_pen: another PointPen used to draw the transformed outline.
max_err: maximum approximation error in font units. For optimal results,
if you know the UPEM of the font, we recommend setting this to a
value equal, or close to UPEM / 1000.
reverse_direction: reverse the winding direction of all contours.
stats: a dictionary counting the point numbers of quadratic segments.
"""
def __init__(self,
other_point_pen,
max_err,
reverse_direction=False,
stats=None):
BasePointToSegmentPen.__init__(self)
if reverse_direction:
self.pen = ReverseContourPointPen(other_point_pen)
else:
self.pen = other_point_pen
self.max_err = max_err
self.stats = stats
def _flushContour(self, segments):
assert len(segments) >= 1
closed = segments[0][0] != "move"
new_segments = []
prev_points = segments[-1][1]
prev_on_curve = prev_points[-1][0]
for segment_type, points in segments:
if segment_type == 'curve':
for sub_points in self._split_super_bezier_segments(points):
on_curve, smooth, name, kwargs = sub_points[-1]
bcp1, bcp2 = sub_points[0][0], sub_points[1][0]
cubic = [prev_on_curve, bcp1, bcp2, on_curve]
quad = curve_to_quadratic(cubic, self.max_err)
if self.stats is not None:
n = str(len(quad) - 2)
self.stats[n] = self.stats.get(n, 0) + 1
new_points = [(pt, False, None, {}) for pt in quad[1:-1]]
new_points.append((on_curve, smooth, name, kwargs))
new_segments.append(["qcurve", new_points])
prev_on_curve = sub_points[-1][0]
else:
new_segments.append([segment_type, points])
prev_on_curve = points[-1][0]
if closed:
# the BasePointToSegmentPen.endPath method that calls _flushContour
# rotates the point list of closed contours so that they end with
# the first on-curve point. We restore the original starting point.
new_segments = new_segments[-1:] + new_segments[:-1]
self._drawPoints(new_segments)
def _split_super_bezier_segments(self, points):
sub_segments = []
# n is the number of control points
n = len(points) - 1
if n == 2:
# a simple bezier curve segment
sub_segments.append(points)
elif n > 2:
# a "super" bezier; decompose it
on_curve, smooth, name, kwargs = points[-1]
num_sub_segments = n - 1
for i, sub_points in enumerate(
decomposeSuperBezierSegment([pt
for pt, _, _, _ in points])):
new_segment = []
for point in sub_points[:-1]:
new_segment.append((point, False, None, {}))
if i == (num_sub_segments - 1):
# the last on-curve keeps its original attributes
new_segment.append((on_curve, smooth, name, kwargs))
else:
# on-curves of sub-segments are always "smooth"
new_segment.append((sub_points[-1], True, None, {}))
sub_segments.append(new_segment)
else:
raise AssertionError("expected 2 control points, found: %d" % n)
return sub_segments
def _drawPoints(self, segments):
pen = self.pen
pen.beginPath()
last_offcurves = []
for i, (segment_type, points) in enumerate(segments):
if segment_type in ("move", "line"):
assert len(points) == 1, (
"illegal line segment point count: %d" % len(points))
pt, smooth, name, kwargs = points[0]
pen.addPoint(pt, segment_type, smooth, name, **kwargs)
elif segment_type == "qcurve":
assert len(points) >= 2, (
"illegal qcurve segment point count: %d" % len(points))
offcurves = points[:-1]
if offcurves:
if i == 0:
# any off-curve points preceding the first on-curve
# will be appended at the end of the contour
last_offcurves = offcurves
else:
for (pt, smooth, name, kwargs) in offcurves:
pen.addPoint(pt, None, smooth, name, **kwargs)
pt, smooth, name, kwargs = points[-1]
if pt is None:
# special quadratic contour with no on-curve points:
# we need to skip the "None" point. See also the Pen
# protocol's qCurveTo() method and fontTools.pens.basePen
pass
else:
pen.addPoint(pt, segment_type, smooth, name, **kwargs)
else:
# 'curve' segments must have been converted to 'qcurve' by now
raise AssertionError("unexpected segment type: %r" %
segment_type)
for (pt, smooth, name, kwargs) in last_offcurves:
pen.addPoint(pt, None, smooth, name, **kwargs)
pen.endPath()
def addComponent(self, baseGlyphName, transformation):
assert self.currentPath is None
self.pen.addComponent(baseGlyphName, transformation)
def test_quadNoOnCurve(self):
tpen = _TestPointPen()
pen = ReverseContourPointPen(tpen)
pen.beginPath(identifier='bar')
pen.addPoint((0, 0))
pen.addPoint((0, 100), identifier='foo', arbitrary='foo')
pen.addPoint((100, 200), arbitrary=123)
pen.addPoint((200, 200))
pen.endPath()
pen.addComponent("base", [1, 0, 0, 1, 0, 0], identifier='foo')
self.assertEqual(
"beginPath(identifier='bar') "
"addPoint((0, 0)) "
"addPoint((200, 200)) "
"addPoint((100, 200), arbitrary=123) "
"addPoint((0, 100), identifier='foo', arbitrary='foo') "
"endPath() "
"addComponent('base', [1, 0, 0, 1, 0, 0], identifier='foo')",
repr(tpen))
def test_quadClosedOffCurveStart(self):
tpen = _TestPointPen()
pen = ReverseContourPointPen(tpen)
pen.beginPath()
pen.addPoint((100, 200))
pen.addPoint((200, 200), segmentType="qcurve")
pen.addPoint((0, 0), segmentType="line")
pen.addPoint((0, 100))
pen.endPath()
self.assertEqual(
"beginPath() "
"addPoint((100, 200)) "
"addPoint((0, 100)) "
"addPoint((0, 0), segmentType='qcurve') "
"addPoint((200, 200), segmentType='line') "
"endPath()", repr(tpen))
def test_cubicOpen(self):
tpen = _TestPointPen()
pen = ReverseContourPointPen(tpen)
pen.beginPath()
pen.addPoint((0, 0), segmentType="move")
pen.addPoint((0, 100))
pen.addPoint((100, 200))
pen.addPoint((200, 200), segmentType="curve")
pen.endPath()
self.assertEqual(
"beginPath() "
"addPoint((200, 200), segmentType='move') "
"addPoint((100, 200)) "
"addPoint((0, 100)) "
"addPoint((0, 0), segmentType='curve') "
"endPath()", repr(tpen))
def drawShapeWithRectInGlyph(self, shape, rect, glyph):
# draw the shape into the glyph
# tell the glyph something is going to happen (undo is going to be prepared)
glyph.prepareUndo("Drawing Shapes")
# get the pen to draw with
pen = glyph.getPointPen()
if glyph.preferredSegmentType == "qcurve" and not self.shouldReverse:
pen = ReverseContourPointPen(pen)
elif self.shouldReverse:
pen = ReverseContourPointPen(pen)
x, y, w, h = rect
# draw a rectangle in the glyph using the pen
if shape == "rect":
pen.beginPath()
pen.addPoint(_roundPoint(x, y), "line")
pen.addPoint(_roundPoint(x + w, y), "line")
pen.addPoint(_roundPoint(x + w, y + h), "line")
pen.addPoint(_roundPoint(x, y + h), "line")
pen.endPath()
# draw an oval in the glyph using the pen
elif shape == "oval":
hw = w/2.
hh = h/2.
r = .55
segmentType = glyph.preferredSegmentType
if glyph.preferredSegmentType == "qcurve":
r = .42
pen.beginPath()
pen.addPoint(_roundPoint(x + hw, y), segmentType, True)
pen.addPoint(_roundPoint(x + hw + hw*r, y))
pen.addPoint(_roundPoint(x + w, y + hh - hh*r))
pen.addPoint(_roundPoint(x + w, y + hh), segmentType, True)
pen.addPoint(_roundPoint(x + w, y + hh + hh*r))
pen.addPoint(_roundPoint(x + hw + hw*r, y + h))
pen.addPoint(_roundPoint(x + hw, y + h), segmentType, True)
pen.addPoint(_roundPoint(x + hw - hw*r, y + h))
pen.addPoint(_roundPoint(x, y + hh + hh*r))
pen.addPoint(_roundPoint(x, y + hh), segmentType, True)
pen.addPoint(_roundPoint(x, y + hh - hh*r))
pen.addPoint(_roundPoint(x + hw - hw*r, y))
pen.endPath()
# tell the glyph you are done with your actions so it can handle the undo properly
glyph.performUndo()
glyph.changed()
