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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/*
* macport.cpp
*
* Python extension to grab m_macPort out of a wxDC.
*
* This module itself doesn't really use any features of C++, but it links
* against wx.h (which is definitely C++).
*/
#include "wx/wx.h"
#include "Python.h"
extern "C"
{
void initmacport(void);
}
/* This converts a string of hex digits into an unsigned long. It reads
This code is a modified version of SWIG_UnpackData from weave/swigptr2.py,
and which I believe originated from the SWIG sources. */
unsigned long hexstr_to_long(const char *c, char bytesize = 4) {
unsigned long retval = 0;
unsigned char *u = reinterpret_cast<unsigned char*>(&retval);
const unsigned char *eu = u + bytesize;
for (; u != eu; ++u) {
register int d = *(c++);
register unsigned char uu = 0;
if ((d >= '0') && (d <= '9'))
uu = ((d - '0') << 4);
else if ((d >= 'a') && (d <= 'f'))
uu = ((d - ('a'-10)) << 4);
else
return 0;
d = *(c++);
if ((d >= '0') && (d <= '9'))
uu |= (d - '0');
else if ((d >= 'a') && (d <= 'f'))
uu |= (d - ('a'-10));
else
return 0;
*u = uu;
}
return retval;
}
PyObject* get_macport(PyObject *self, PyObject *args)
{
const char err_string[] = "get_macport() requires a SWIG 'this' string.";
// the string representing the address embedded in the SWIG this ptr
char *dc_addr_str = NULL;
int length = 0;
int err = 0;
wxDC *p_dc = NULL;
wxGraphicsContext *p_gc = NULL;
err = PyArg_ParseTuple(args, "s#", &dc_addr_str, &length);
if (err != 1)
{
PyErr_SetString(PyExc_ValueError, err_string);
return NULL;
}
else if (length < 10)
{
PyErr_SetString(PyExc_ValueError, err_string);
return NULL;
}
else
{
p_dc = reinterpret_cast<wxDC*>(hexstr_to_long(dc_addr_str+1, 4));
p_gc = reinterpret_cast<wxGraphicsContext*>(p_dc->GetGraphicsContext());
unsigned long tmp = reinterpret_cast<unsigned long>(p_gc->GetNativeContext());
return Py_BuildValue("k", tmp);
}
}
static PyMethodDef macport_methods[] = {
{"get_macport", get_macport, METH_VARARGS,
"get_macport(dc.this) -> Returns the pointer (as an unsigned long) of the CGContextRef of a wxDC.this SWIG pointer"},
{NULL, NULL}
};
void initmacport(void)
{
Py_InitModule("macport", macport_methods);
}
|
