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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 itkPyBuffer_h
#define itkPyBuffer_h
#include "itkObject.h"
#include "itkObjectFactory.h"
#include "itkDefaultConvertPixelTraits.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 PyBuffer
*
* \brief Helper class to get ITK image views into python arrays and back.
*
* This class will receive a C buffer and create the equivalent python
* array view. This permits passing image buffers into python arrays from
* the NumPy python package.
*
* \ingroup ITKBridgeNumPy
*/
template <typename TImage>
class PyBuffer
{
public:
/** Standard "Self" type alias. */
using Self = PyBuffer;
/** Type of the image from which the buffer will be converted */
using ImageType = TImage;
using PixelType = typename ImageType::PixelType;
using SizeType = typename ImageType::SizeType;
using IndexType = typename ImageType::IndexType;
using RegionType = typename ImageType::RegionType;
using PointType = typename ImageType::PointType;
using SpacingType = typename ImageType::SpacingType;
using ImagePointer = typename ImageType::Pointer;
using ComponentType = typename DefaultConvertPixelTraits<PixelType>::ComponentType;
/** Image dimension. */
static constexpr unsigned int ImageDimension = ImageType::ImageDimension;
using OutputImagePointer = typename TImage::Pointer;
/**
* Get an Array with the content of the image buffer
*/
static PyObject *
_GetArrayViewFromImage(ImageType * image);
/**
* Get an ITK image from a Python array
*/
static const OutputImagePointer
_GetImageViewFromArray(PyObject * arr, PyObject * shape, PyObject * numOfComponent);
};
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkPyBuffer.hxx"
#endif
#endif // _itkPyBuffer_h
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