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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageCast.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkImageCast.h"
#include "vtkImageData.h"
#include "vtkImageProgressIterator.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
vtkStandardNewMacro(vtkImageCast);
//----------------------------------------------------------------------------
vtkImageCast::vtkImageCast()
{
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
this->OutputScalarType = VTK_FLOAT;
this->ClampOverflow = 0;
}
//----------------------------------------------------------------------------
// Just change the Image type.
int vtkImageCast::RequestInformation (
vtkInformation * vtkNotUsed( request ),
vtkInformationVector** vtkNotUsed( inputVector ),
vtkInformationVector * outputVector)
{
// get the info objects
vtkInformation* outInfo = outputVector->GetInformationObject(0);
vtkDataObject::SetPointDataActiveScalarInfo(outInfo, this->OutputScalarType, -1);
return 1;
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
template <class IT, class OT>
void vtkImageCastExecute(vtkImageCast *self,
vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id, IT *, OT *)
{
vtkImageIterator<IT> inIt(inData, outExt);
vtkImageProgressIterator<OT> outIt(outData, outExt, self, id);
double typeMin, typeMax, val;
int clamp;
// for preventing overflow
typeMin = outData->GetScalarTypeMin();
typeMax = outData->GetScalarTypeMax();
clamp = self->GetClampOverflow();
// Loop through ouput pixels
while (!outIt.IsAtEnd())
{
IT* inSI = inIt.BeginSpan();
OT* outSI = outIt.BeginSpan();
OT* outSIEnd = outIt.EndSpan();
if (clamp)
{
while (outSI != outSIEnd)
{
// Pixel operation
val = static_cast<double>(*inSI);
if (val > typeMax)
{
val = typeMax;
}
if (val < typeMin)
{
val = typeMin;
}
*outSI = static_cast<OT>(val);
++outSI;
++inSI;
}
}
else
{
while (outSI != outSIEnd)
{
// now process the components
*outSI = static_cast<OT>(*inSI);
++outSI;
++inSI;
}
}
inIt.NextSpan();
outIt.NextSpan();
}
}
//----------------------------------------------------------------------------
template <class T>
void vtkImageCastExecute(vtkImageCast *self,
vtkImageData *inData,
vtkImageData *outData, int outExt[6], int id,
T *)
{
switch (outData->GetScalarType())
{
vtkTemplateMacro(vtkImageCastExecute(self,
inData, outData, outExt, id,
static_cast<T *>(0),
static_cast<VTK_TT *>(0)));
default:
vtkGenericWarningMacro("Execute: Unknown output ScalarType");
return;
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output region, and executes the filter
// algorithm to fill the output from the input.
// It just executes a switch statement to call the correct function for
// the regions data types.
void vtkImageCast::ThreadedExecute (vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id)
{
switch (inData->GetScalarType())
{
vtkTemplateMacro(
vtkImageCastExecute(this, inData,
outData, outExt, id,
static_cast<VTK_TT *>(0)));
default:
vtkErrorMacro(<< "Execute: Unknown input ScalarType");
return;
}
}
//----------------------------------------------------------------------------
void vtkImageCast::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "OutputScalarType: " << this->OutputScalarType << "\n";
os << indent << "ClampOverflow: ";
if (this->ClampOverflow)
{
os << "On\n";
}
else
{
os << "Off\n";
}
}
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