def _convert_vmobject_to_skia_path(self, vmobject: VMobject) -> SkiaPath:
"""Converts a :class:`~.VMobject` to SkiaPath. This method only works for
cairo renderer because it treats the points as Cubic beizer curves.
Parameters
----------
vmobject:
The :class:`~.VMobject` to convert from.
Returns
-------
SkiaPath:
The converted path.
"""
path = SkiaPath()
if not np.all(np.isfinite(vmobject.points)):
points = np.zeros((1, 3)) # point invalid?
else:
points = vmobject.points
if len(points) == 0: # what? No points so return empty path
return path
# In OpenGL it's quadratic beizer curves while on Cairo it's cubic...
if config.renderer == "opengl":
subpaths = vmobject.get_subpaths_from_points(points)
for subpath in subpaths:
quads = vmobject.get_bezier_tuples_from_points(subpath)
start = subpath[0]
path.moveTo(*start[:2])
for p0, p1, p2 in quads:
path.quadTo(*p1[:2], *p2[:2])
if vmobject.consider_points_equals(subpath[0], subpath[-1]):
path.close()
else:
subpaths = vmobject.gen_subpaths_from_points_2d(points)
for subpath in subpaths:
quads = vmobject.gen_cubic_bezier_tuples_from_points(subpath)
start = subpath[0]
path.moveTo(*start[:2])
for p0, p1, p2, p3 in quads:
path.cubicTo(*p1[:2], *p2[:2], *p3[:2])
if vmobject.consider_points_equals_2d(subpath[0], subpath[-1]):
path.close()
return path
def test_transform(self):
path = Path()
path.moveTo(125, 376)
path.cubicTo(181, 376, 218, 339, 218, 290)
path.cubicTo(218, 225, 179, 206, 125, 206)
path.close()
# t = Transform().rotate(radians(-45)).translate(-100, 0)
matrix = (0.707107, -0.707107, 0.707107, 0.707107, -70.7107, 70.7107)
result = path.transform(*matrix)
expected = Path()
expected.moveTo(
bits2float(0x438dc663), # 283.55
bits2float(0x437831ce), # 248.195
)
expected.cubicTo(
bits2float(0x43a192ee), # 323.148
bits2float(0x435098b8), # 208.597
bits2float(0x43a192ee), # 323.148
bits2float(0x431c454a), # 156.271
bits2float(0x43903ff5), # 288.5
bits2float(0x42f33ead), # 121.622
)
expected.cubicTo(
bits2float(0x437289a8), # 242.538
bits2float(0x42975227), # 75.6605
bits2float(0x43498688), # 201.526
bits2float(0x42b39aee), # 89.8026
bits2float(0x4323577c), # 163.342
bits2float(0x42fff906), # 127.986
)
expected.close()
result.dump(as_hex=True)
assert result == expected
def test_duplicate_start_point():
# https://github.com/fonttools/skia-pathops/issues/13
path = Path()
path.moveTo(
bits2float(0x43480000), # 200
bits2float(0x43db8ce9), # 439.101
)
path.lineTo(
bits2float(0x43480000), # 200
bits2float(0x4401c000), # 519
)
path.cubicTo(
bits2float(0x43480000), # 200
bits2float(0x441f0000), # 636
bits2float(0x43660000), # 230
bits2float(0x44340000), # 720
bits2float(0x43c80000), # 400
bits2float(0x44340000), # 720
)
path.cubicTo(
bits2float(0x4404c000), # 531
bits2float(0x44340000), # 720
bits2float(0x440d0000), # 564
bits2float(0x442b8000), # 686
bits2float(0x44118000), # 582
bits2float(0x4416c000), # 603
)
path.lineTo(
bits2float(0x442cc000), # 691
bits2float(0x441c8000), # 626
)
path.cubicTo(
bits2float(0x44260000), # 664
bits2float(0x443d4000), # 757
bits2float(0x44114000), # 581
bits2float(0x444a8000), # 810
bits2float(0x43c88000), # 401
bits2float(0x444a8000), # 810
)
path.cubicTo(
bits2float(0x43350000), # 181
bits2float(0x444a8000), # 810
bits2float(0x42c80000), # 100
bits2float(0x442e0000), # 696
bits2float(0x42c80000), # 100
bits2float(0x4401c000), # 519
)
path.lineTo(
bits2float(0x42c80000), # 100
bits2float(0x438a8000), # 277
)
path.cubicTo(
bits2float(0x42c80000), # 100
bits2float(0x42cc0000), # 102
bits2float(0x433e0000), # 190
bits2float(0xc1200000), # -10
bits2float(0x43cd0000), # 410
bits2float(0xc1200000), # -10
)
path.cubicTo(
bits2float(0x441d8000), # 630
bits2float(0xc1200000), # -10
bits2float(0x442f0000), # 700
bits2float(0x42e60000), # 115
bits2float(0x442f0000), # 700
bits2float(0x437a0000), # 250
)
path.lineTo(
bits2float(0x442f0000), # 700
bits2float(0x43880000), # 272
)
path.cubicTo(
bits2float(0x442f0000), # 700
bits2float(0x43d18000), # 419
bits2float(0x44164000), # 601
bits2float(0x43fa0000), # 500
bits2float(0x43c88000), # 401
bits2float(0x43fa0000), # 500
)
path.cubicTo(
bits2float(0x43964752), # 300.557
bits2float(0x43fa0000), # 500
bits2float(0x436db1ed), # 237.695
bits2float(0x43ef6824), # 478.814
bits2float(0x43480000), # 200
bits2float(0x43db8ce9), # 439.101
)
path.close()
path.moveTo(
bits2float(0x434805cb), # 200.023
bits2float(0x43881798), # 272.184
)
path.cubicTo(
bits2float(0x43493da4), # 201.241
bits2float(0x43b2a869), # 357.316
bits2float(0x437bd6b1), # 251.839
bits2float(0x43cd0000), # 410
bits2float(0x43c80000), # 400
bits2float(0x43cd0000), # 410
)
path.cubicTo(
bits2float(0x44098000), # 550
bits2float(0x43cd0000), # 410
bits2float(0x44160000), # 600
bits2float(0x43b20000), # 356
bits2float(0x44160000), # 600
bits2float(0x43868000), # 269
)
path.lineTo(
bits2float(0x44160000), # 600
bits2float(0x43808000), # 257
)
path.cubicTo(
bits2float(0x44160000), # 600
bits2float(0x43330000), # 179
bits2float(0x44110000), # 580
bits2float(0x429c0000), # 78
bits2float(0x43cd0000), # 410
bits2float(0x429c0000), # 78
)
path.cubicTo(
bits2float(0x43725298), # 242.323
bits2float(0x429c0000), # 78
bits2float(0x43491e05), # 201.117
bits2float(0x431ccd43), # 156.802
bits2float(0x434805cb), # 200.023
bits2float(0x43881797), # 272.184
)
path.close()
contours = list(path.contours)
# on the second contour, the last and first points' Y coordinate only
# differ by one bit: 0x43881798 != 0x43881797
points = contours[1].points
assert points[0] != points[-1]
assert points[0] == pytest.approx(points[-1])
# when "drawn" as segments, almost equal last/first points are treated
# as exactly equal, without the need of an extra closing lineTo
for contour in path.contours:
segments = list(contour.segments)
assert segments[-1][0] == "closePath"
first_type, first_pts = segments[0]
last_type, last_pts = segments[-2]
assert first_type == "moveTo"
assert last_type == "curveTo"
assert last_pts[-1] == first_pts[-1]
