Merge branch 'rightlib' into merge-libs-250514-0050

1 files changed, 72 insertions, 0 deletions

diff --git a/contrib/python/matplotlib/py2/src/_backend_gdk.c b/contrib/python/matplotlib/py2/src/_backend_gdk.c
new file mode 100644
index 00000000000..8314219cca2
--- /dev/null
+++ b/contrib/python/matplotlib/py2/src/_backend_gdk.c
@@ -0,0 +1,72 @@
+/* -*- mode: C; c-basic-offset: 4 -*-
+ * C extensions for backend_gdk
+ */
+
+#include "Python.h"
+#include "numpy/arrayobject.h"
+
+#include <pygtk/pygtk.h>
+
+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);
+    if (PyArray_SetBaseObject(array, (PyObject *)py_pixbuf) == -1) {
+        Py_DECREF(py_pixbuf);
+        Py_DECREF(array);
+        return NULL;
+    }
+    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");
+}