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Backport PR #12569 on branch v3.0.x (Don't confuse uintptr_t and Py_ssize_t.) #12595

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4 changes: 3 additions & 1 deletion setupext.py
Original file line number Diff line number Diff line change
Expand Up @@ -1363,11 +1363,13 @@ def check(self):

def get_extension(self):
sources = [
'src/_tkagg.cpp'
'src/_tkagg.cpp',
'src/py_converters.cpp',
]

ext = make_extension('matplotlib.backends._tkagg', sources)
self.add_flags(ext)
Numpy().add_flags(ext)
LibAgg().add_flags(ext, add_sources=False)
return ext

Expand Down
8 changes: 5 additions & 3 deletions src/_tkagg.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@
// Include our own excerpts from the Tcl / Tk headers
#include "_tkmini.h"

#include "py_converters.h"

#if defined(_MSC_VER)
# define IMG_FORMAT "%d %d %Iu"
#else
Expand Down Expand Up @@ -213,9 +215,9 @@ static PyObject *mpl_tk_blit(PyObject *self, PyObject *args)
int x1, x2, y1, y2;
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
if (!PyArg_ParseTuple(args, "ns(iin)(iiii)(iiii):blit",
&interp, &photo_name,
&height, &width, &data_ptr,
if (!PyArg_ParseTuple(args, "O&s(iiO&)(iiii)(iiii):blit",
convert_voidptr, &interp, &photo_name,
&height, &width, convert_voidptr, &data_ptr,
&o0, &o1, &o2, &o3,
&x1, &x2, &y1, &y2)) {
goto exit;
Expand Down
7 changes: 7 additions & 0 deletions src/py_converters.cpp
Original file line number Diff line number Diff line change
Expand Up @@ -94,6 +94,13 @@ int convert_from_attr(PyObject *obj, const char *name, converter func, void *p)
return 1;
}

int convert_voidptr(PyObject *obj, void *p)
{
void **val = (void **)p;
*val = PyLong_AsVoidPtr(obj);
return *val != NULL ? 1 : !PyErr_Occurred();
}

int convert_double(PyObject *obj, void *p)
{
double *val = (double *)p;
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1 change: 1 addition & 0 deletions src/py_converters.h
Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,7 @@ typedef int (*converter)(PyObject *, void *);
int convert_from_attr(PyObject *obj, const char *name, converter func, void *p);
int convert_from_method(PyObject *obj, const char *name, converter func, void *p);

int convert_voidptr(PyObject *obj, void *p);
int convert_double(PyObject *obj, void *p);
int convert_bool(PyObject *obj, void *p);
int convert_cap(PyObject *capobj, void *capp);
Expand Down