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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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 sitkPixelIDTypes_h
#define sitkPixelIDTypes_h
namespace itk
{
template <typename TPixelType, unsigned int VImageDimension> class Image;
template <typename TPixelType, unsigned int VImageDimension > class VectorImage;
template < typename TLabelObject > class LabelMap;
template < typename TLabelObject, unsigned int VImageDimension > class LabelObject;
namespace simple
{
/** This type is used as an identity for pixel of itk::Image type
*
* This is an empty type which is used for compile-time
* meta-programming. It does not contain any information, an image
* type can be converted to one of the PixelID types, and an PixelID
* can be converted to a value. However, a run-time value can not be
* converted to this compile time type.
*
* \sa PixelIDToImageType
* \sa ImageTypeToPixelID
* \sa ImageTypeToPixelIDValue
* \sa PixelIDToPixelIDValue
*/
template <typename TPixelType>
struct BasicPixelID
{};
/** This type is used as an identity for pixel of itk::VectorImage type
*
* This is an empty type which is used for compile-time
* meta-programming. It does not contain any information, an image
* type can be converted to one of the PixelID types, and an PixelID
* can be converted to a value. However, a run-time value can not be
* converted to this compile time type.
*
* \sa PixelIDToImageType
* \sa ImageTypeToPixelID
* \sa ImageTypeToPixelIDValue
* \sa PixelIDToPixelIDValue
*/
template <typename TPixelType>
struct VectorPixelID
{};
/** This type is used as an identity for pixel of itk::LabelMap type
*
* This is an empty type which is used for compile-time
* meta-programming. It does not contain any information, an image
* type can be converted to one of the PixelID types, and an PixelID
* can be converted to a value. However, a run-time value can not be
* converted to this compile time type.
*
* \sa PixelIDToImageType
* \sa ImageTypeToPixelID
* \sa ImageTypeToPixelIDValue
* \sa PixelIDToPixelIDValue
*/
template <typename TPixelType>
struct LabelPixelID
{};
/** A meta-programming tool to query the "itk image type" if a PixelID
* at compile type
*
* This structure contains one property,
* PixelIDToImageType<T>::ImageType is the "itk image type" of the
* pixel ID.
*
* \sa BasicPixelID
* \sa VectorPixelID
* \sa LabelPixelID
* \sa ImageTypeToPixelIDValue
*
* @{ */
template <typename TPixelIDType, unsigned int VImageDimension> struct PixelIDToImageType;
template <typename TPixelType, unsigned int VImageDimension>
struct PixelIDToImageType< BasicPixelID<TPixelType> , VImageDimension >
{
typedef itk::Image< TPixelType, VImageDimension > ImageType;
};
template <typename TVectorPixelType, unsigned int VImageDimension>
struct PixelIDToImageType< VectorPixelID< TVectorPixelType >, VImageDimension >
{
typedef itk::VectorImage< TVectorPixelType, VImageDimension > ImageType;
};
template <typename TLabelType, unsigned int VImageDimension>
struct PixelIDToImageType< LabelPixelID< TLabelType >, VImageDimension >
{
typedef itk::LabelMap< itk::LabelObject< TLabelType, VImageDimension > > ImageType;
};
/** @} */
/** A meta-programming tool to query the PixelID property of an "itk
* image type" at compile type
*
* This structure contains one property,
* ImageTypeToPixelID<T>::PixelIDType is the "itk image type" of the
* pixel ID.
*
* \sa BasicPixelID
* \sa VectorPixelID
* \sa LabelPixelID
* \sa ImageTypeToPixelIDValue
*
* @{ */
template <typename TImageType> struct ImageTypeToPixelID;
template <typename TPixelType, unsigned int VImageDimension>
struct ImageTypeToPixelID< itk::Image< TPixelType, VImageDimension> >
{
typedef BasicPixelID<TPixelType > PixelIDType;
};
template <typename TPixelType, unsigned int VImageDimension>
struct ImageTypeToPixelID< itk::VectorImage< TPixelType, VImageDimension> >
{
typedef VectorPixelID< TPixelType > PixelIDType;
};
template <typename TLabelType, unsigned int VImageDimension>
struct ImageTypeToPixelID< itk::LabelMap< itk::LabelObject< TLabelType, VImageDimension > > >
{
typedef LabelPixelID< TLabelType > PixelIDType;
};
/** @} */
}
}
#endif // _sitkPixelIDTypes_h
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