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vtkImageStencil.cxx
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vtkImageStencil.cxx
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageStencil.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 "vtkImageStencil.h"
#include "vtkImageData.h"
#include "vtkImageIterator.h"
#include "vtkImageStencilData.h"
#include "vtkImageStencilIterator.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include <cmath>
vtkStandardNewMacro(vtkImageStencil);
//----------------------------------------------------------------------------
vtkImageStencil::vtkImageStencil()
{
this->ReverseStencil = 0;
this->BackgroundColor[0] = 1;
this->BackgroundColor[1] = 1;
this->BackgroundColor[2] = 1;
this->BackgroundColor[3] = 1;
this->SetNumberOfInputPorts(3);
}
//----------------------------------------------------------------------------
vtkImageStencil::~vtkImageStencil()
{
}
//----------------------------------------------------------------------------
void vtkImageStencil::SetStencilData(vtkImageStencilData *stencil)
{
this->SetInputData(2, stencil);
}
//----------------------------------------------------------------------------
vtkImageStencilData *vtkImageStencil::GetStencil()
{
if (this->GetNumberOfInputConnections(2) < 1)
{
return nullptr;
}
else
{
return vtkImageStencilData::SafeDownCast(
this->GetExecutive()->GetInputData(2, 0));
}
}
//----------------------------------------------------------------------------
void vtkImageStencil::SetBackgroundInputData(vtkImageData *data)
{
this->SetInputData(1, data);
}
//----------------------------------------------------------------------------
vtkImageData *vtkImageStencil::GetBackgroundInput()
{
if (this->GetNumberOfInputConnections(1) < 1)
{
return nullptr;
}
else
{
return vtkImageData::SafeDownCast(
this->GetExecutive()->GetInputData(1, 0));
}
}
//----------------------------------------------------------------------------
// Some helper functions for 'ThreadedRequestData'
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
// copy a pixel, advance the output pointer but not the input pointer
template<class T>
inline void vtkCopyPixel(T *&out, const T *in, int numscalars)
{
do
{
*out++ = *in++;
}
while (--numscalars);
}
//----------------------------------------------------------------------------
// Convert background color from double to appropriate type
template <class T>
void vtkAllocBackground(vtkImageStencil *self, T *&background,
vtkInformation *outInfo)
{
vtkImageData *output = vtkImageData::SafeDownCast(
outInfo->Get(vtkDataObject::DATA_OBJECT()));
int numComponents = output->GetNumberOfScalarComponents();
int scalarType = output->GetScalarType();
background = new T[numComponents];
for (int i = 0; i < numComponents; i++)
{
if (i < 4)
{
if (scalarType == VTK_FLOAT || scalarType == VTK_DOUBLE)
{
background[i] = static_cast<T>(self->GetBackgroundColor()[i]);
}
else
{ // round float to nearest int
background[i] =
static_cast<T>(floor(self->GetBackgroundColor()[i] + 0.5));
}
}
else
{ // all values past 4 are set to zero
background[i] = 0;
}
}
}
//----------------------------------------------------------------------------
template <class T>
void vtkFreeBackground(vtkImageStencil *vtkNotUsed(self), T *&background)
{
delete [] background;
background = nullptr;
}
//----------------------------------------------------------------------------
template <class T>
void vtkImageStencilExecute(vtkImageStencil *self,
vtkImageData *inData, T *,
vtkImageData *inData2, T *,
vtkImageData *outData, T *,
int outExt[6], int id,
vtkInformation *outInfo)
{
vtkImageStencilData *stencil = self->GetStencil();
vtkImageIterator<T> inIter(inData, outExt);
vtkImageStencilIterator<T> outIter(outData, stencil, outExt, self, id);
int numscalars = outData->GetNumberOfScalarComponents();
// whether to reverse the stencil
bool reverseStencil = (self->GetReverseStencil() != 0);
// if no background image is provided in inData2
if (inData2 == nullptr)
{
// set color for area outside of input volume extent
T *background;
vtkAllocBackground(self, background, outInfo);
T *inPtr = inIter.BeginSpan();
T *inSpanEndPtr = inIter.EndSpan();
while (!outIter.IsAtEnd())
{
T* outPtr = outIter.BeginSpan();
T* outSpanEndPtr = outIter.EndSpan();
T *tmpPtr = inPtr;
int tmpInc = numscalars;
if (!(outIter.IsInStencil() ^ reverseStencil))
{
tmpPtr = background;
tmpInc = 0;
}
// move inPtr forward by the span size
inPtr += (outSpanEndPtr - outPtr);
while (outPtr != outSpanEndPtr)
{
// CopyPixel increments outPtr but not tmpPtr
vtkCopyPixel(outPtr, tmpPtr, numscalars);
tmpPtr += tmpInc;
}
outIter.NextSpan();
// this occurs at the end of a full row
if (inPtr == inSpanEndPtr)
{
inIter.NextSpan();
inPtr = inIter.BeginSpan();
inSpanEndPtr = inIter.EndSpan();
}
}
vtkFreeBackground(self, background);
}
// if a background image is given in inData2
else
{
vtkImageIterator<T> inIter2(inData2, outExt);
T *inPtr = inIter.BeginSpan();
T *inPtr2 = inIter2.BeginSpan();
T *inSpanEndPtr = inIter.EndSpan();
while (!outIter.IsAtEnd())
{
T* outPtr = outIter.BeginSpan();
T* outSpanEndPtr = outIter.EndSpan();
T *tmpPtr = inPtr;
if (!(outIter.IsInStencil() ^ reverseStencil))
{
tmpPtr = inPtr2;
}
// move inPtr forward by the span size
inPtr += (outSpanEndPtr - outPtr);
inPtr2 += (outSpanEndPtr - outPtr);
while (outPtr != outSpanEndPtr)
{
// CopyPixel increments outPtr but not tmpPtr
vtkCopyPixel(outPtr, tmpPtr, numscalars);
tmpPtr += numscalars;
}
outIter.NextSpan();
// this occurs at the end of a full row
if (inPtr == inSpanEndPtr)
{
inIter.NextSpan();
inIter2.NextSpan();
inPtr = inIter.BeginSpan();
inPtr2 = inIter2.BeginSpan();
inSpanEndPtr = inIter.EndSpan();
}
}
}
}
//----------------------------------------------------------------------------
void vtkImageStencil::ThreadedRequestData(
vtkInformation *vtkNotUsed(request),
vtkInformationVector **inputVector,
vtkInformationVector *outputVector,
vtkImageData ***inData,
vtkImageData **outData,
int outExt[6], int id)
{
void *inPtr, *inPtr2;
void *outPtr;
vtkImageData *inData2 = this->GetBackgroundInput();
inPtr = inData[0][0]->GetScalarPointer();
outPtr = outData[0]->GetScalarPointerForExtent(outExt);
vtkInformation *outInfo = outputVector->GetInformationObject(0);
inPtr2 = nullptr;
if (inData2)
{
inPtr2 = inData2->GetScalarPointer();
if (inData2->GetScalarType() != inData[0][0]->GetScalarType())
{
if (id == 0)
{
vtkErrorMacro("Execute: BackgroundInput ScalarType "
<< inData2->GetScalarType()
<< ", must match Input ScalarType "
<< inData[0][0]->GetScalarType());
}
return;
}
else if (inData2->GetNumberOfScalarComponents()
!= inData[0][0]->GetNumberOfScalarComponents())
{
if (id == 0)
{
vtkErrorMacro("Execute: BackgroundInput NumberOfScalarComponents "
<< inData2->GetNumberOfScalarComponents()
<< ", must match Input NumberOfScalarComponents "
<< inData[0][0]->GetNumberOfScalarComponents());
}
return;
}
int wholeExt1[6], wholeExt2[6];
vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
vtkInformation *inInfo2 = inputVector[1]->GetInformationObject(0);
inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),wholeExt1);
inInfo2->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT(),wholeExt2);
for (int i = 0; i < 6; i++)
{
if (wholeExt1[i] != wholeExt2[i])
{
if (id == 0)
{
vtkErrorMacro("Execute: BackgroundInput must have the same "
"WholeExtent as the Input");
}
return;
}
}
}
switch (inData[0][0]->GetScalarType())
{
vtkTemplateMacro(
vtkImageStencilExecute(this,
inData[0][0],
static_cast<VTK_TT *>(inPtr),
inData2,
static_cast<VTK_TT *>(inPtr2),
outData[0],
static_cast<VTK_TT *>(outPtr),
outExt,
id,
outInfo));
default:
vtkErrorMacro("Execute: Unknown ScalarType");
return;
}
}
//----------------------------------------------------------------------------
int vtkImageStencil::FillInputPortInformation(int port, vtkInformation* info)
{
if (port == 2)
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkImageStencilData");
info->Set(vtkAlgorithm::INPUT_IS_OPTIONAL(), 1);
}
else
{
info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkImageData");
if (port == 1)
{
info->Set(vtkAlgorithm::INPUT_IS_OPTIONAL(), 1);
}
}
return 1;
}
void vtkImageStencil::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Stencil: " << this->GetStencil() << "\n";
os << indent << "ReverseStencil: " << (this->ReverseStencil ?
"On\n" : "Off\n");
os << indent << "BackgroundInput: " << this->GetBackgroundInput() << "\n";
os << indent << "BackgroundValue: " << this->BackgroundColor[0] << "\n";
os << indent << "BackgroundColor: (" << this->BackgroundColor[0] << ", "
<< this->BackgroundColor[1] << ", "
<< this->BackgroundColor[2] << ", "
<< this->BackgroundColor[3] << ")\n";
}