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/* -*- mode: C; c-basic-offset: 4 -*-

* C extensions for backend_gdk

*/

#include "Python.h"

#include "numpy/arrayobject.h"

#include <pygtk/pygtk.h>

// support numpy 1.6 - this macro was renamed and deprecated at once in 1.7

#ifndef NPY_ARRAY_WRITEABLE

#define NPY_ARRAY_WRITEABLE NPY_WRITEABLE

#endif

static PyTypeObject *_PyGdkPixbuf_Type;

#define PyGdkPixbuf_Type (*_PyGdkPixbuf_Type)

static PyObject *pixbuf_get_pixels_array(PyObject *self, PyObject *args)

{

/* 1) read in Python pixbuf, get the underlying gdk_pixbuf */

PyGObject *py_pixbuf;

GdkPixbuf *gdk_pixbuf;

PyArrayObject *array;

npy_intp dims[3] = { 0, 0, 3 };

npy_intp strides[3];

if (!PyArg_ParseTuple(args, "O!:pixbuf_get_pixels_array", &PyGdkPixbuf_Type, &py_pixbuf))

return NULL;

gdk_pixbuf = GDK_PIXBUF(py_pixbuf->obj);

/* 2) same as pygtk/gtk/gdk.c _wrap_gdk_pixbuf_get_pixels_array()

* with 'self' changed to py_pixbuf

*/

dims[0] = gdk_pixbuf_get_height(gdk_pixbuf);

dims[1] = gdk_pixbuf_get_width(gdk_pixbuf);

if (gdk_pixbuf_get_has_alpha(gdk_pixbuf))

dims[2] = 4;

strides[0] = gdk_pixbuf_get_rowstride(gdk_pixbuf);

strides[1] = dims[2];

strides[2] = 1;

array = (PyArrayObject*)

PyArray_New(&PyArray_Type, 3, dims, NPY_UBYTE, strides,

(void*)gdk_pixbuf_get_pixels(gdk_pixbuf), 1,

NPY_ARRAY_WRITEABLE, NULL);

if (array == NULL)

return NULL;

/* the array holds a ref to the pixbuf pixels through this wrapper*/

Py_INCREF(py_pixbuf);

PyArray_SetBaseObject(array, (PyObject *)py_pixbuf);

return PyArray_Return(array);

}

static PyMethodDef _backend_gdk_functions[] = {

{ "pixbuf_get_pixels_array", (PyCFunction)pixbuf_get_pixels_array, METH_VARARGS },

{ NULL, NULL, 0 }

};

PyMODINIT_FUNC init_backend_gdk(void)

{

PyObject *mod;

mod = Py_InitModule("matplotlib.backends._backend_gdk", _backend_gdk_functions);

import_array();

init_pygtk();

mod = PyImport_ImportModule("gtk.gdk");

_PyGdkPixbuf_Type = (PyTypeObject *)PyObject_GetAttrString(mod, "Pixbuf");

}