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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkPyVnl_h
#define itkPyVnl_h
#include <vnl/vnl_vector.h>
#include <vnl/vnl_matrix.h>
// The python header defines _POSIX_C_SOURCE without a preceding #undef
#undef _POSIX_C_SOURCE
#undef _XOPEN_SOURCE
#include <Python.h>
namespace itk
{
/**
* \class PyVnl
*
* \brief Helper class get views of VNL data buffers in python arrays and back.
*
* This class will either receive a VNL data structure and create the equivalent
* Python array view or will receive a Python array and create a copy of it in a
* VNL data structure. This permits passing VNL data structures into python arrays
* from the NumPy python package.
*
* \ingroup ITKBridgeNumPy
*/
template <typename TElement>
class PyVnl
{
public:
/** Standard "Self" type alias. */
using Self = PyVnl;
/** Type of the data from which the buffer will be converted */
using DataType = TElement;
using VectorType = vnl_vector<TElement>;
using MatrixType = vnl_matrix<TElement>;
/**
* Get an Array with the content of the vnl vector
*/
static PyObject *
_GetArrayViewFromVnlVector(VectorType * vector);
/**
* Get a vnl vector from a Python array
*/
static const VectorType
_GetVnlVectorFromArray(PyObject * arr, PyObject * shape);
/**
* Get an Array with the content of the vnl matrix
*/
static PyObject *
_GetArrayViewFromVnlMatrix(MatrixType * matrix);
/**
* Get a vnl matrix from a Python array
*/
static const MatrixType
_GetVnlMatrixFromArray(PyObject * arr, PyObject * shape);
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkPyVnl.hxx"
#endif
#endif // _itkPyVnl_h
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