def _curve_to_quadratic(self, pt1, pt2, pt3):
curve = (self.current_pt, pt1, pt2, pt3)
quadratic = curve_to_quadratic(curve, self.max_err)
if self.stats is not None:
n = str(len(quadratic) - 2)
self.stats[n] = self.stats.get(n, 0) + 1
self.qCurveTo(*quadratic[1:])
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 setUpClass(cls):
"""Do the curve conversion ahead of time, and run tests on results."""
with open(os.path.join(DATADIR, "curves.json"), "r") as fp:
curves = json.load(fp)
cls.single_splines = [curve_to_quadratic(c, MAX_ERR) for c in curves]
cls.single_errors = [
cls.curve_spline_dist(c, s)
for c, s in zip(curves, cls.single_splines)
]
curve_groups = [curves[i:i + 3] for i in range(0, 300, 3)]
cls.compat_splines = [
curves_to_quadratic(c, [MAX_ERR] * 3) for c in curve_groups
]
cls.compat_errors = [[
cls.curve_spline_dist(c, s) for c, s in zip(curve_group, splines)
] for curve_group, splines in zip(curve_groups, cls.compat_splines)]
cls.results = []