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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/**
* @class vtkImageShiftScale
* @brief shift and scale an input image
*
* With vtkImageShiftScale Pixels are shifted (a constant value added)
* and then scaled (multiplied by a scalar. As a convenience, this class
* allows you to set the output scalar type similar to vtkImageCast.
* This is because shift scale operations frequently convert data types.
*/
#ifndef vtkImageShiftScale_h
#define vtkImageShiftScale_h
#include "vtkImagingCoreModule.h" // For export macro
#include "vtkThreadedImageAlgorithm.h"
VTK_ABI_NAMESPACE_BEGIN
class VTKIMAGINGCORE_EXPORT vtkImageShiftScale : public vtkThreadedImageAlgorithm
{
public:
static vtkImageShiftScale* New();
vtkTypeMacro(vtkImageShiftScale, vtkThreadedImageAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
///@{
/**
* Set/Get the shift value. This value is added to each pixel
*/
vtkSetMacro(Shift, double);
vtkGetMacro(Shift, double);
///@}
///@{
/**
* Set/Get the scale value. Each pixel is multiplied by this value.
*/
vtkSetMacro(Scale, double);
vtkGetMacro(Scale, double);
///@}
///@{
/**
* Set the desired output scalar type. The result of the shift
* and scale operations is cast to the type specified.
*/
vtkSetMacro(OutputScalarType, int);
vtkGetMacro(OutputScalarType, int);
void SetOutputScalarTypeToDouble() { this->SetOutputScalarType(VTK_DOUBLE); }
void SetOutputScalarTypeToFloat() { this->SetOutputScalarType(VTK_FLOAT); }
void SetOutputScalarTypeToLong() { this->SetOutputScalarType(VTK_LONG); }
void SetOutputScalarTypeToUnsignedLong() { this->SetOutputScalarType(VTK_UNSIGNED_LONG); }
void SetOutputScalarTypeToInt() { this->SetOutputScalarType(VTK_INT); }
void SetOutputScalarTypeToUnsignedInt() { this->SetOutputScalarType(VTK_UNSIGNED_INT); }
void SetOutputScalarTypeToShort() { this->SetOutputScalarType(VTK_SHORT); }
void SetOutputScalarTypeToUnsignedShort() { this->SetOutputScalarType(VTK_UNSIGNED_SHORT); }
void SetOutputScalarTypeToChar() { this->SetOutputScalarType(VTK_CHAR); }
void SetOutputScalarTypeToUnsignedChar() { this->SetOutputScalarType(VTK_UNSIGNED_CHAR); }
///@}
///@{
/**
* When the ClampOverflow flag is on, the data is thresholded so that
* the output value does not exceed the max or min of the data type.
* Clamping is safer because otherwise you might invoke undefined
* behavior (and may crash) if the type conversion is out of range
* of the data type. On the other hand, clamping is slower.
* By default, ClampOverflow is off.
*/
vtkSetMacro(ClampOverflow, vtkTypeBool);
vtkGetMacro(ClampOverflow, vtkTypeBool);
vtkBooleanMacro(ClampOverflow, vtkTypeBool);
///@}
protected:
vtkImageShiftScale();
~vtkImageShiftScale() override;
double Shift;
double Scale;
int OutputScalarType;
vtkTypeBool ClampOverflow;
int RequestInformation(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
void ThreadedRequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*,
vtkImageData*** inData, vtkImageData** outData, int outExt[6], int threadId) override;
private:
vtkImageShiftScale(const vtkImageShiftScale&) = delete;
void operator=(const vtkImageShiftScale&) = delete;
};
VTK_ABI_NAMESPACE_END
#endif
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