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vtkImageMapToWindowLevelColors.cxx
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vtkImageMapToWindowLevelColors.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageMapToWindowLevelColors.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 "vtkImageMapToWindowLevelColors.h"
#include "vtkDataArray.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkScalarsToColors.h"
#include "vtkPointData.h"
vtkStandardNewMacro(vtkImageMapToWindowLevelColors);
// Constructor sets default values
vtkImageMapToWindowLevelColors::vtkImageMapToWindowLevelColors()
{
this->Window = 255;
this->Level = 127.5;
}
vtkImageMapToWindowLevelColors::~vtkImageMapToWindowLevelColors()
{
}
//----------------------------------------------------------------------------
// This method checks to see if we can simply reference the input data
int vtkImageMapToWindowLevelColors::RequestData(
vtkInformation *request,
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkImageData *outData = vtkImageData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
vtkImageData *inData = vtkImageData::SafeDownCast(
inInfo->Get(vtkDataObject::DATA_OBJECT()));
// If LookupTable is null and window / level produces no change,
// then just pass the data
if (this->LookupTable == nullptr &&
(inData->GetScalarType() == VTK_UNSIGNED_CHAR &&
this->Window == 255 && this->Level == 127.5))
{
vtkDebugMacro("ExecuteData: LookupTable not set, "\
"Window / Level at default, "\
"passing input to output.");
outData->SetExtent(inData->GetExtent());
outData->GetPointData()->PassData(inData->GetPointData());
this->DataWasPassed = 1;
}
else
// normal behaviour - skip up a level since we don't want to
// call the superclasses ExecuteData - it would pass the data if there
// is no lookup table even if there is a window / level - wrong
// behavior.
{
if (this->DataWasPassed)
{
outData->GetPointData()->SetScalars(nullptr);
this->DataWasPassed = 0;
}
return this->vtkThreadedImageAlgorithm::RequestData(request, inputVector,
outputVector);
}
return 1;
}
//----------------------------------------------------------------------------
int vtkImageMapToWindowLevelColors::RequestInformation (
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector)
{
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
vtkInformation *inScalarInfo =
vtkDataObject::GetActiveFieldInformation(inInfo,
vtkDataObject::FIELD_ASSOCIATION_POINTS, vtkDataSetAttributes::SCALARS);
if (!inScalarInfo)
{
vtkErrorMacro("Missing scalar field on input information!");
return 0;
}
// If LookupTable is null and window / level produces no change,
// then the data will be passed
if ( this->LookupTable == nullptr &&
(inScalarInfo->Get(vtkDataObject::FIELD_ARRAY_TYPE()) ==
VTK_UNSIGNED_CHAR &&
this->Window == 255 && this->Level == 127.5) )
{
if (inScalarInfo->Get(vtkDataObject::FIELD_ARRAY_TYPE()) !=
VTK_UNSIGNED_CHAR)
{
vtkErrorMacro("ExecuteInformation: No LookupTable was set and input data is not VTK_UNSIGNED_CHAR!");
}
else
{
// no lookup table, pass the input if it was VTK_UNSIGNED_CHAR
vtkDataObject::SetPointDataActiveScalarInfo
(outInfo, VTK_UNSIGNED_CHAR,
inScalarInfo->Get(vtkDataObject::FIELD_NUMBER_OF_COMPONENTS()));
}
}
else // the lookup table was set or window / level produces a change
{
int numComponents = 4;
switch (this->OutputFormat)
{
case VTK_RGBA:
numComponents = 4;
break;
case VTK_RGB:
numComponents = 3;
break;
case VTK_LUMINANCE_ALPHA:
numComponents = 2;
break;
case VTK_LUMINANCE:
numComponents = 1;
break;
default:
vtkErrorMacro("ExecuteInformation: Unrecognized color format.");
break;
}
vtkDataObject::SetPointDataActiveScalarInfo(outInfo, VTK_UNSIGNED_CHAR, numComponents);
}
return 1;
}
/*
* This templated routine calculates effective lower and upper limits
* for a window of values of type T, lower and upper.
*/
template <class T>
void vtkImageMapToWindowLevelClamps ( vtkImageData *data, double w,
double l, T& lower, T& upper,
unsigned char &lower_val,
unsigned char &upper_val)
{
double f_lower, f_upper, f_lower_val, f_upper_val;
double adjustedLower, adjustedUpper;
double range[2];
data->GetPointData()->GetScalars()->GetDataTypeRange( range );
f_lower = l - fabs(w) / 2.0;
f_upper = f_lower + fabs(w);
// Set the correct lower value
if ( f_lower <= range[1])
{
if (f_lower >= range[0])
{
lower = static_cast<T>(f_lower);
adjustedLower = f_lower;
}
else
{
lower = static_cast<T>(range[0]);
adjustedLower = range[0];
}
}
else
{
lower = static_cast<T>(range[1]);
adjustedLower = range[1];
}
// Set the correct upper value
if ( f_upper >= range[0])
{
if (f_upper <= range[1])
{
upper = static_cast<T>(f_upper);
adjustedUpper = f_upper;
}
else
{
upper = static_cast<T>(range[1]);
adjustedUpper = range[1];
}
}
else
{
upper = static_cast<T>(range[0]);
adjustedUpper = range [0];
}
// now compute the lower and upper values
if (w > 0.0)
{
f_lower_val = 255.0*(adjustedLower - f_lower)/w;
f_upper_val = 255.0*(adjustedUpper - f_lower)/w;
}
else if (w < 0.0)
{
f_lower_val = 255.0 + 255.0*(adjustedLower - f_lower)/w;
f_upper_val = 255.0 + 255.0*(adjustedUpper - f_lower)/w;
}
else
{
f_lower_val = 0.0;
f_upper_val = 255.0;
}
if (f_upper_val > 255)
{
upper_val = 255;
}
else if (f_upper_val < 0)
{
upper_val = 0;
}
else
{
upper_val = static_cast<unsigned char>(f_upper_val);
}
if (f_lower_val > 255)
{
lower_val = 255;
}
else if (f_lower_val < 0)
{
lower_val = 0;
}
else
{
lower_val = static_cast<unsigned char>(f_lower_val);
}
}
//----------------------------------------------------------------------------
// This non-templated function executes the filter for any type of data.
template <class T>
void vtkImageMapToWindowLevelColorsExecute(
vtkImageMapToWindowLevelColors *self,
vtkImageData *inData, T *inPtr,
vtkImageData *outData,
unsigned char *outPtr,
int outExt[6], int id)
{
int idxX, idxY, idxZ;
int extX, extY, extZ;
vtkIdType inIncX, inIncY, inIncZ;
vtkIdType outIncX, outIncY, outIncZ;
unsigned long count = 0;
unsigned long target;
int dataType = inData->GetScalarType();
int numberOfComponents,numberOfOutputComponents,outputFormat;
int rowLength;
vtkScalarsToColors *lookupTable = self->GetLookupTable();
unsigned char *outPtr1;
T *inPtr1;
unsigned char *optr;
T *iptr;
double shift = self->GetWindow() / 2.0 - self->GetLevel();
double scale = 255.0 / self->GetWindow();
T lower, upper;
unsigned char lower_val, upper_val, result_val;
unsigned short ushort_val;
vtkImageMapToWindowLevelClamps( inData, self->GetWindow(),
self->GetLevel(),
lower, upper, lower_val, upper_val );
// find the region to loop over
extX = outExt[1] - outExt[0] + 1;
extY = outExt[3] - outExt[2] + 1;
extZ = outExt[5] - outExt[4] + 1;
target = static_cast<unsigned long>(extZ*extY/50.0);
target++;
// Get increments to march through data
inData->GetContinuousIncrements(outExt, inIncX, inIncY, inIncZ);
outData->GetContinuousIncrements(outExt, outIncX, outIncY, outIncZ);
numberOfComponents = inData->GetNumberOfScalarComponents();
numberOfOutputComponents = outData->GetNumberOfScalarComponents();
outputFormat = self->GetOutputFormat();
rowLength = extX*numberOfComponents;
// Loop through output pixels
outPtr1 = outPtr;
inPtr1 = inPtr;
for (idxZ = 0; idxZ < extZ; idxZ++)
{
for (idxY = 0; !self->AbortExecute && idxY < extY; idxY++)
{
if (!id)
{
if (!(count%target))
{
self->UpdateProgress(count/(50.0*target));
}
count++;
}
iptr = inPtr1;
optr = outPtr1;
if ( lookupTable )
{
lookupTable->MapScalarsThroughTable2(
inPtr1,
static_cast<unsigned char *>(outPtr1),
dataType,extX,numberOfComponents,
outputFormat);
for (idxX = 0; idxX < extX; idxX++)
{
if (*iptr <= lower)
{
ushort_val = lower_val;
}
else if (*iptr >= upper)
{
ushort_val = upper_val;
}
else
{
ushort_val = static_cast<unsigned char>((*iptr + shift)*scale);
}
*optr = static_cast<unsigned char>((*optr * ushort_val) >> 8);
switch (outputFormat)
{
case VTK_RGBA:
*(optr+1) = static_cast<unsigned char>(
(*(optr+1) * ushort_val) >> 8);
*(optr+2) = static_cast<unsigned char>(
(*(optr+2) * ushort_val) >> 8);
*(optr+3) = 255;
break;
case VTK_RGB:
*(optr+1) = static_cast<unsigned char>(
(*(optr+1) * ushort_val) >> 8);
*(optr+2) = static_cast<unsigned char>(
(*(optr+2) * ushort_val) >> 8);
break;
case VTK_LUMINANCE_ALPHA:
*(optr+1) = 255;
break;
}
iptr += numberOfComponents;
optr += numberOfOutputComponents;
}
}
else
{
for (idxX = 0; idxX < extX; idxX++)
{
if (*iptr <= lower)
{
result_val = lower_val;
}
else if (*iptr >= upper)
{
result_val = upper_val;
}
else
{
result_val = static_cast<unsigned char>((*iptr + shift)*scale);
}
*optr = result_val;
switch (outputFormat)
{
case VTK_RGBA:
*(optr+1) = result_val;
*(optr+2) = result_val;
*(optr+3) = 255;
break;
case VTK_RGB:
*(optr+1) = result_val;
*(optr+2) = result_val;
break;
case VTK_LUMINANCE_ALPHA:
*(optr+1) = 255;
break;
}
iptr += numberOfComponents;
optr += numberOfOutputComponents;
}
}
outPtr1 += outIncY + extX*numberOfOutputComponents;
inPtr1 += inIncY + rowLength;
}
outPtr1 += outIncZ;
inPtr1 += inIncZ;
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output data, and executes the filter
// algorithm to fill the output from the input.
void vtkImageMapToWindowLevelColors::ThreadedRequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **vtkNotUsed(inputVector),
vtkInformationVector *vtkNotUsed(outputVector),
vtkImageData ***inData,
vtkImageData **outData,
int outExt[6], int id)
{
void *inPtr = inData[0][0]->GetScalarPointerForExtent(outExt);
void *outPtr = outData[0]->GetScalarPointerForExtent(outExt);
switch (inData[0][0]->GetScalarType())
{
vtkTemplateMacro(
vtkImageMapToWindowLevelColorsExecute(this,
inData[0][0],
static_cast<VTK_TT *>(inPtr),
outData[0],
static_cast<unsigned char *>(outPtr),
outExt,
id));
default:
vtkErrorMacro(<< "Execute: Unknown ScalarType");
return;
}
}
void vtkImageMapToWindowLevelColors::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Window: " << this->Window << endl;
os << indent << "Level: " << this->Level << endl;
}