Don't use C++ exceptions in convert_trans_affine

mdboom · mdboom · commit 8b6229cb5ba8 · 2018-05-21T15:14:05.000-04:00
diff --git a/src/py_converters.cpp b/src/py_converters.cpp
@@ -327,27 +327,26 @@ int convert_trans_affine(PyObject *obj, void *transp)
         return 1;
     }
 
-    try
-    {
-        numpy::array_view<const double, 2> matrix(obj);
+    PyArrayObject *array = (PyArrayObject *)PyArray_ContiguousFromAny(obj, NPY_DOUBLE, 2, 2);
+    if (array == NULL) {
+        return 0;
+    }
 
-        if (matrix.dim(0) == 3 && matrix.dim(1) == 3) {
-            trans->sx = matrix(0, 0);
-            trans->shx = matrix(0, 1);
-            trans->tx = matrix(0, 2);
+    if (PyArray_DIM(array, 0) == 3 && PyArray_DIM(array, 1) == 3) {
+        double *buffer = (double *)PyArray_DATA(array);
+        trans->sx = buffer[0];
+        trans->shx = buffer[1];
+        trans->tx = buffer[2];
 
-            trans->shy = matrix(1, 0);
-            trans->sy = matrix(1, 1);
-            trans->ty = matrix(1, 2);
+        trans->shy = buffer[3];
+        trans->sy = buffer[4];
+        trans->ty = buffer[5];
 
-            return 1;
-        }
-    }
-    catch (py::exception &)
-    {
-        return 0;
+        Py_DECREF(array);
+        return 1;
     }
 
+    Py_DECREF(array);
     PyErr_SetString(PyExc_ValueError, "Invalid affine transformation matrix");
     return 0;
 }
