def glyph_to_quadratic(glyph, max_n, max_err, correctDirection=True,
verbose=False):
""" Convert the glyph outline to TrueType quadratic splines. """
new = Glyph()
writerPen = new.getPointPen()
cu2quPen = Cu2QuPen(writerPen, max_n, max_err, verbose)
if correctDirection:
reversePen = ReverseContourPointPen(cu2quPen)
glyph.drawPoints(reversePen)
else:
glyph.drawPoints(cu2quPen)
# clear glyph but keep anchors for mark, mkmk features
glyph.clearContours()
glyph.clearComponents()
writerPen = glyph.getPointPen()
new.drawPoints(writerPen)
class OutlinePen(BasePen):
pointClass = MathPoint
magicCurve = 0.5522847498
def __init__(self, glyphSet, offset=10, contrast=0, contrastAngle=0, connection="square", cap="round", miterLimit=None, closeOpenPaths=True, preserveComponents=False):
BasePen.__init__(self, glyphSet)
self.offset = abs(offset)
self.contrast = abs(contrast)
self.contrastAngle = contrastAngle
self._inputmiterLimit = miterLimit
if miterLimit is None:
miterLimit = self.offset * 2
self.miterLimit = abs(miterLimit)
self.closeOpenPaths = closeOpenPaths
self.connectionCallback = getattr(self, "connection%s" % (connection.title()))
self.capCallback = getattr(self, "cap%s" % (cap.title()))
self.originalGlyph = Glyph()
self.originalPen = self.originalGlyph.getPen()
self.outerGlyph = Glyph()
self.outerPen = self.outerGlyph.getPen()
self.outerCurrentPoint = None
self.outerFirstPoint = None
self.outerPrevPoint = None
self.innerGlyph = Glyph()
self.innerPen = self.innerGlyph.getPen()
self.innerCurrentPoint = None
self.innerFirstPoint = None
self.innerPrevPoint = None
self.prevPoint = None
self.firstPoint = None
self.firstAngle = None
self.prevAngle = None
self.shouldHandleMove = True
self.preserveComponents = preserveComponents
self.components = []
self.drawSettings()
def _moveTo(self, xy):
(x, y) = xy
if self.offset == 0:
self.outerPen.moveTo((x, y))
self.innerPen.moveTo((x, y))
return
self.originalPen.moveTo((x, y))
p = self.pointClass(x, y)
self.prevPoint = p
self.firstPoint = p
self.shouldHandleMove = True
def _lineTo(self, xy):
(x, y) = xy
if self.offset == 0:
self.outerPen.lineTo((x, y))
self.innerPen.lineTo((x, y))
return
self.originalPen.lineTo((x, y))
currentPoint = self.pointClass(x, y)
if currentPoint == self.prevPoint:
return
self.currentAngle = self.prevPoint.angle(currentPoint)
thickness = self.getThickness(self.currentAngle)
self.innerCurrentPoint = self.prevPoint - self.pointClass(cos(self.currentAngle), sin(self.currentAngle)) * thickness
self.outerCurrentPoint = self.prevPoint + self.pointClass(cos(self.currentAngle), sin(self.currentAngle)) * thickness
if self.shouldHandleMove:
self.shouldHandleMove = False
self.innerPen.moveTo(self.innerCurrentPoint)
self.innerFirstPoint = self.innerCurrentPoint
self.outerPen.moveTo(self.outerCurrentPoint)
self.outerFirstPoint = self.outerCurrentPoint
self.firstAngle = self.currentAngle
else:
self.buildConnection()
self.innerCurrentPoint = currentPoint - self.pointClass(cos(self.currentAngle), sin(self.currentAngle)) * thickness
self.innerPen.lineTo(self.innerCurrentPoint)
self.innerPrevPoint = self.innerCurrentPoint
self.outerCurrentPoint = currentPoint + self.pointClass(cos(self.currentAngle), sin(self.currentAngle)) * thickness
self.outerPen.lineTo(self.outerCurrentPoint)
self.outerPrevPoint = self.outerCurrentPoint
self.prevPoint = currentPoint
self.prevAngle = self.currentAngle
def _curveToOne(self, xy1, xy2, xy3):
(x1, y1), (x2, y2), (x3, y3) = xy1, xy2, xy3
if self.offset == 0:
self.outerPen.curveTo((x1, y1), (x2, y2), (x3, y3))
self.innerPen.curveTo((x1, y1), (x2, y2), (x3, y3))
return
self.originalPen.curveTo((x1, y1), (x2, y2), (x3, y3))
p1 = self.pointClass(x1, y1)
p2 = self.pointClass(x2, y2)
p3 = self.pointClass(x3, y3)
if p1 == self.prevPoint:
p1 = pointOnACurve(self.prevPoint, p1, p2, p3, 0.01)
if p2 == p3:
p2 = pointOnACurve(self.prevPoint, p1, p2, p3, 0.99)
a1 = self.prevPoint.angle(p1)
a2 = p2.angle(p3)
self.currentAngle = a1
tickness1 = self.getThickness(a1)
tickness2 = self.getThickness(a2)
a1bis = self.prevPoint.angle(p1, 0)
a2bis = p3.angle(p2, 0)
intersectPoint = interSect((self. prevPoint, self.prevPoint + self.pointClass(cos(a1), sin(a1)) * 100),
(p3, p3 + self.pointClass(cos(a2), sin(a2)) * 100))
self.innerCurrentPoint = self.prevPoint - self.pointClass(cos(a1), sin(a1)) * tickness1
self.outerCurrentPoint = self.prevPoint + self.pointClass(cos(a1), sin(a1)) * tickness1
if self.shouldHandleMove:
self.shouldHandleMove = False
self.innerPen.moveTo(self.innerCurrentPoint)
self.innerFirstPoint = self.innerPrevPoint = self.innerCurrentPoint
self.outerPen.moveTo(self.outerCurrentPoint)
self.outerFirstPoint = self.outerPrevPoint = self.outerCurrentPoint
self.firstAngle = a1
else:
self.buildConnection()
h1 = None
if intersectPoint is not None:
h1 = interSect((self.innerCurrentPoint, self.innerCurrentPoint + self.pointClass(cos(a1bis), sin(a1bis)) * tickness1), (intersectPoint, p1))
if h1 is None:
h1 = p1 - self.pointClass(cos(a1), sin(a1)) * tickness1
self.innerCurrentPoint = p3 - self.pointClass(cos(a2), sin(a2)) * tickness2
h2 = None
if intersectPoint is not None:
h2 = interSect((self.innerCurrentPoint, self.innerCurrentPoint + self.pointClass(cos(a2bis), sin(a2bis)) * tickness2), (intersectPoint, p2))
if h2 is None:
h2 = p2 - self.pointClass(cos(a1), sin(a1)) * tickness1
self.innerPen.curveTo(h1, h2, self.innerCurrentPoint)
self.innerPrevPoint = self.innerCurrentPoint
########
h1 = None
if intersectPoint is not None:
h1 = interSect((self.outerCurrentPoint, self.outerCurrentPoint + self.pointClass(cos(a1bis), sin(a1bis)) * tickness1), (intersectPoint, p1))
if h1 is None:
h1 = p1 + self.pointClass(cos(a1), sin(a1)) * tickness1
self.outerCurrentPoint = p3 + self.pointClass(cos(a2), sin(a2)) * tickness2
h2 = None
if intersectPoint is not None:
h2 = interSect((self.outerCurrentPoint, self.outerCurrentPoint + self.pointClass(cos(a2bis), sin(a2bis)) * tickness2), (intersectPoint, p2))
if h2 is None:
h2 = p2 + self.pointClass(cos(a1), sin(a1)) * tickness1
self.outerPen.curveTo(h1, h2, self.outerCurrentPoint)
self.outerPrevPoint = self.outerCurrentPoint
self.prevPoint = p3
self.currentAngle = a2
self.prevAngle = a2
def _closePath(self):
if self.shouldHandleMove:
return
if self.offset == 0:
self.outerPen.closePath()
self.innerPen.closePath()
return
if not self.prevPoint == self.firstPoint:
self._lineTo(self.firstPoint)
self.originalPen.closePath()
self.innerPrevPoint = self.innerCurrentPoint
self.innerCurrentPoint = self.innerFirstPoint
self.outerPrevPoint = self.outerCurrentPoint
self.outerCurrentPoint = self.outerFirstPoint
self.prevAngle = self.currentAngle
self.currentAngle = self.firstAngle
self.buildConnection(close=True)
self.innerPen.closePath()
self.outerPen.closePath()
def _endPath(self):
if self.shouldHandleMove:
return
self.originalPen.endPath()
self.innerPen.endPath()
self.outerPen.endPath()
if self.closeOpenPaths:
innerContour = self.innerGlyph[-1]
outerContour = self.outerGlyph[-1]
innerContour.reverse()
innerContour[0].segmentType = "line"
outerContour[0].segmentType = "line"
self.buildCap(outerContour, innerContour)
for point in innerContour:
outerContour.addPoint((point.x, point.y), segmentType=point.segmentType, smooth=point.smooth)
self.innerGlyph.removeContour(innerContour)
def addComponent(self, glyphName, transform):
if self.preserveComponents:
self.components.append((glyphName, transform))
else:
BasePen.addComponent(self, glyphName, transform)
## thickness
def getThickness(self, angle):
a2 = angle + pi * .5
f = abs(sin(a2 + radians(self.contrastAngle)))
f = f ** 5
return self.offset + self.contrast * f
## connections
def buildConnection(self, close=False):
if not checkSmooth(self.prevAngle, self.currentAngle):
if checkInnerOuter(self.prevAngle, self.currentAngle):
self.connectionCallback(self.outerPrevPoint, self.outerCurrentPoint, self.outerPen, close)
self.connectionInnerCorner(self.innerPrevPoint, self.innerCurrentPoint, self.innerPen, close)
else:
self.connectionCallback(self.innerPrevPoint, self.innerCurrentPoint, self.innerPen, close)
self.connectionInnerCorner(self.outerPrevPoint, self.outerCurrentPoint, self.outerPen, close)
def connectionSquare(self, first, last, pen, close):
angle_1 = radians(degrees(self.prevAngle)+90)
angle_2 = radians(degrees(self.currentAngle)+90)
tempFirst = first - self.pointClass(cos(angle_1), sin(angle_1)) * self.miterLimit
tempLast = last + self.pointClass(cos(angle_2), sin(angle_2)) * self.miterLimit
newPoint = interSect((first, tempFirst), (last, tempLast))
if newPoint is not None:
if self._inputmiterLimit is not None and roundFloat(newPoint.distance(first)) > self._inputmiterLimit:
pen.lineTo(tempFirst)
pen.lineTo(tempLast)
else:
pen.lineTo(newPoint)
if not close:
pen.lineTo(last)
def connectionRound(self, first, last, pen, close):
angle_1 = radians(degrees(self.prevAngle)+90)
angle_2 = radians(degrees(self.currentAngle)+90)
tempFirst = first - self.pointClass(cos(angle_1), sin(angle_1)) * self.miterLimit
tempLast = last + self.pointClass(cos(angle_2), sin(angle_2)) * self.miterLimit
newPoint = interSect((first, tempFirst), (last, tempLast))
if newPoint is None:
pen.lineTo(last)
return
#print "(%s, %s)," % (newPoint.x, newPoint.y)
distance1 = newPoint.distance(first)
distance2 = newPoint.distance(last)
#print distance1, distance2
if roundFloat(distance1) > self.miterLimit + self.contrast:
distance1 = self.miterLimit + tempFirst.distance(tempLast) * .7
if roundFloat(distance2) > self.miterLimit + self.contrast:
distance2 = self.miterLimit + tempFirst.distance(tempLast) * .7
distance1 *= self.magicCurve
distance2 *= self.magicCurve
bcp1 = first - self.pointClass(cos(angle_1), sin(angle_1)) * distance1
bcp2 = last + self.pointClass(cos(angle_2), sin(angle_2)) * distance2
pen.curveTo(bcp1, bcp2, last)
def connectionButt(self, first, last, pen, close):
if not close:
pen.lineTo(last)
def connectionInnerCorner(self, first, last, pen, close):
if not close:
pen.lineTo(last)
## caps
def buildCap(self, firstContour, lastContour):
first = firstContour[-1]
last = lastContour[0]
first = self.pointClass(first.x, first.y)
last = self.pointClass(last.x, last.y)
self.capCallback(firstContour, lastContour, first, last, self.prevAngle)
first = lastContour[-1]
last = firstContour[0]
first = self.pointClass(first.x, first.y)
last = self.pointClass(last.x, last.y)
angle = radians(degrees(self.firstAngle)+180)
self.capCallback(lastContour, firstContour, first, last, angle)
def capButt(self, firstContour, lastContour, first, last, angle):
## not nothing
pass
def capRound(self, firstContour, lastContour, first, last, angle):
hookedAngle = radians(degrees(angle)+90)
p1 = first - self.pointClass(cos(hookedAngle), sin(hookedAngle)) * self.offset
p2 = last - self.pointClass(cos(hookedAngle), sin(hookedAngle)) * self.offset
oncurve = p1 + (p2-p1)*.5
roundness = .54
h1 = first - self.pointClass(cos(hookedAngle), sin(hookedAngle)) * self.offset * roundness
h2 = oncurve + self.pointClass(cos(angle), sin(angle)) * self.offset * roundness
firstContour[-1].smooth = True
firstContour.addPoint((h1.x, h1.y))
firstContour.addPoint((h2.x, h2.y))
firstContour.addPoint((oncurve.x, oncurve.y), smooth=True, segmentType="curve")
h1 = oncurve - self.pointClass(cos(angle), sin(angle)) * self.offset * roundness
h2 = last - self.pointClass(cos(hookedAngle), sin(hookedAngle)) * self.offset * roundness
firstContour.addPoint((h1.x, h1.y))
firstContour.addPoint((h2.x, h2.y))
lastContour[0].segmentType = "curve"
lastContour[0].smooth = True
def capSquare(self, firstContour, lastContour, first, last, angle):
angle = radians(degrees(angle)+90)
firstContour[-1].smooth = True
lastContour[0].smooth = True
p1 = first - self.pointClass(cos(angle), sin(angle)) * self.offset
firstContour.addPoint((p1.x, p1.y), smooth=False, segmentType="line")
p2 = last - self.pointClass(cos(angle), sin(angle)) * self.offset
firstContour.addPoint((p2.x, p2.y), smooth=False, segmentType="line")
def drawSettings(self, drawOriginal=False, drawInner=False, drawOuter=True):
self.drawOriginal = drawOriginal
self.drawInner = drawInner
self.drawOuter = drawOuter
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 draw(self, pen):
pointPen = PointToSegmentPen(pen)
self.drawPoints(pointPen)
def getGlyph(self):
glyph = Glyph()
pointPen = glyph.getPointPen()
self.drawPoints(pointPen)
return glyph
