/usr/include/ITK-4.9/itkConvertPixelBuffer.h is in libinsighttoolkit4-dev 4.9.0-4ubuntu1.
This file is owned by root:root, with mode 0o644.
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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 itkConvertPixelBuffer_h
#define itkConvertPixelBuffer_h
#include "ITKIOImageBaseExport.h"
#include "itkObject.h"
#include "itkNumericTraits.h"
namespace itk
{
/**
* \class ConvertPixelBuffer
* \brief Class to convert blocks of data from one type to another.
*
* ConvertPixelBuffer has a static method Convert(). It is used by
* itkImageFileReader to convert from an unknown type at run-time to the
* compile-time template pixel type in itkImageFileReader. To work with
* complex pixel types like RGB and RGBA a traits class is used.
* OutputConvertTraits() is the traits class. The default one used is
* DefaultConvertPixelTraits.
*
* \ingroup ITKIOImageBase
*/
template<
typename InputPixelType,
typename OutputPixelType,
typename OutputConvertTraits
>
class ConvertPixelBuffer
{
public:
/** Determine the output data type. */
typedef typename OutputConvertTraits::ComponentType OutputComponentType;
typedef ConvertPixelBuffer Self;
/** General method converts from one type to another. */
static void Convert(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData, size_t size);
static void ConvertVectorImage(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData, size_t size);
protected:
/** Convert to Gray output. */
/** Input values are cast to output values. */
static void ConvertGrayToGray(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Weights convert from linear RGB to CIE luminance assuming a
* modern monitor. See Charles Poynton's Colour FAQ
*
* http://www.poynton.com/ColorFAQ.html */
static void ConvertRGBToGray(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Weights convert from linear RGB to CIE luminance assuming a
* modern monitor. Values are attentuated by the Alpha channel. See
* Charles Poynton's Colour FAQ
* http://www.poynton.com/ColorFAQ.html */
static void ConvertRGBAToGray(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertMultiComponentToGray(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData,
size_t size);
/** Convert to RGB output. */
/** Each RGB output component is set the the
* input Gray value. */
static void ConvertGrayToRGB(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Input values are cast component by component to output values. */
static void ConvertRGBToRGB(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Input values are attenuated by the Alpha channel. */
static void ConvertRGBAToRGB(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Conversion depends upon the number of components in the
* input. If the number of input components is 2, the output
* components are each set to the first input component attenuated
* by the second input component. This assumes that a two input
* pixel represents intensity and alpha. If the number of input
* components is not 2, the first three output components a are set
* to the first three input components. The remaining input
* components are ignored. */
static void ConvertMultiComponentToRGB(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData,
size_t size);
/** Convert to RGBA output. */
static void ConvertGrayToRGBA(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertRGBToRGBA(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertRGBAToRGBA(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertMultiComponentToRGBA(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData,
size_t size);
/** Convert tensor output. */
/** Each input is made into a 6 component symmetric pixel */
static void ConvertTensor6ToTensor6(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertTensor9ToTensor6(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
/** Convertions related to complex */
static void ConvertGrayToComplex(InputPixelType *inputData,
OutputPixelType *OutputData, size_t size);
static void ConvertComplexToComplex(InputPixelType *inputData,
OutputPixelType *outputData, size_t size);
static void ConvertMultiComponentToComplex(InputPixelType *inputData,
int inputNumberOfComponents,
OutputPixelType *outputData, size_t size);
private:
ConvertPixelBuffer();
~ConvertPixelBuffer();
/** the most common case, where InputComponentType == unsigned
* char, the alpha is in the range 0..255. I presume in the
* mythical world of rgba<X> for all integral scalar types X, alpha
* will be in the range 0..X::max(). In the even more fantastical
* world of rgb<float> or rgb<double> alpha would have to be 1.0
*/
template <typename PixelType>
static double MaxAlpha(PixelType &) { return static_cast<double>(NumericTraits<PixelType>::max()); }
static double MaxAlpha(double &) { return static_cast<double>(NumericTraits<double>::OneValue()); }
static double MaxAlpha(float &) { return static_cast<double>(NumericTraits<float>::OneValue()); }
};
} //namespace ITK
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkConvertPixelBuffer.hxx"
#endif
#endif // itkConvertPixelBuffer_h
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