1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
import ctypes
import numpy as np
from . import QT_LIB
from . import compat
__all__ = ["get_qpainterpath_element_array"]
class QArrayDataQt5(ctypes.Structure):
_fields_ = [
("ref", ctypes.c_int),
("size", ctypes.c_int),
("alloc", ctypes.c_uint, 31),
("offset", ctypes.c_ssize_t),
]
class QPainterPathPrivateQt5(ctypes.Structure):
_fields_ = [
("ref", ctypes.c_int),
("adata", ctypes.POINTER(QArrayDataQt5)),
]
class QArrayDataQt6(ctypes.Structure):
_fields_ = [
("ref", ctypes.c_int),
("flags", ctypes.c_uint),
("alloc", ctypes.c_ssize_t),
]
class QPainterPathPrivateQt6(ctypes.Structure):
_fields_ = [
("ref", ctypes.c_int),
("adata", ctypes.POINTER(QArrayDataQt6)),
("data", ctypes.c_void_p),
("size", ctypes.c_ssize_t),
]
def get_qpainterpath_element_array(qpath, nelems=None):
writable = nelems is not None
if writable:
qpath.reserve(nelems)
itemsize = 24
dtype = dict(names=['x','y','c'], formats=['f8', 'f8', 'i4'], itemsize=itemsize)
ptr0 = compat.unwrapinstance(qpath)
pte_cp = ctypes.c_void_p.from_address(ptr0)
if not pte_cp:
return np.zeros(0, dtype=dtype)
# _cp : ctypes pointer
# _ci : ctypes instance
if QT_LIB in ['PyQt5', 'PySide2']:
PTR = ctypes.POINTER(QPainterPathPrivateQt5)
pte_ci = ctypes.cast(pte_cp, PTR).contents
size_ci = pte_ci.adata[0]
eptr = ctypes.addressof(size_ci) + size_ci.offset
elif QT_LIB in ['PyQt6', 'PySide6']:
PTR = ctypes.POINTER(QPainterPathPrivateQt6)
pte_ci = ctypes.cast(pte_cp, PTR).contents
size_ci = pte_ci
eptr = pte_ci.data
else:
raise NotImplementedError
if writable:
size_ci.size = nelems
else:
nelems = size_ci.size
vp = compat.voidptr(eptr, itemsize*nelems, writable)
return np.frombuffer(vp, dtype=dtype)
|
