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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageDataStreamer.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 "vtkImageDataStreamer.h"
#include "vtkCommand.h"
#include "vtkExtentTranslator.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkInformationVector.h"
#include "vtkObjectFactory.h"
#include "vtkStreamingDemandDrivenPipeline.h"
vtkStandardNewMacro(vtkImageDataStreamer);
vtkCxxSetObjectMacro(vtkImageDataStreamer,ExtentTranslator,vtkExtentTranslator);
//----------------------------------------------------------------------------
vtkImageDataStreamer::vtkImageDataStreamer()
{
// default to 10 divisions
this->NumberOfStreamDivisions = 10;
this->CurrentDivision = 0;
// create default translator
this->ExtentTranslator = vtkExtentTranslator::New();
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
}
vtkImageDataStreamer::~vtkImageDataStreamer()
{
if (this->ExtentTranslator)
{
this->ExtentTranslator->Delete();
}
}
//----------------------------------------------------------------------------
void vtkImageDataStreamer::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "NumberOfStreamDivisions: " << this->NumberOfStreamDivisions << endl;
if ( this->ExtentTranslator )
{
os << indent << "ExtentTranslator:\n";
this->ExtentTranslator->PrintSelf(os,indent.GetNextIndent());
}
else
{
os << indent << "ExtentTranslator: (none)\n";
}
}
//----------------------------------------------------------------------------
int vtkImageDataStreamer::ProcessRequest(vtkInformation* request,
vtkInformationVector** inputVector,
vtkInformationVector* outputVector)
{
if(request->Has(vtkStreamingDemandDrivenPipeline::REQUEST_UPDATE_EXTENT()))
{
// we must set the extent on the input
vtkInformation* outInfo = outputVector->GetInformationObject(0);
// get the requested update extent
int outExt[6];
outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), outExt);
// setup the inputs update extent
int inExt[6] = {0, -1, 0, -1, 0, -1};
vtkExtentTranslator *translator = this->GetExtentTranslator();
translator->SetWholeExtent(outExt);
translator->SetNumberOfPieces(this->NumberOfStreamDivisions);
translator->SetPiece(this->CurrentDivision);
if (translator->PieceToExtentByPoints())
{
translator->GetExtent(inExt);
}
inputVector[0]->GetInformationObject(0)
->Set(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), inExt, 6);
return 1;
}
// generate the data
else if(request->Has(vtkDemandDrivenPipeline::REQUEST_DATA()))
{
// get the output data object
vtkInformation* outInfo = outputVector->GetInformationObject(0);
vtkImageData *output =
vtkImageData::SafeDownCast(outInfo->Get(vtkDataObject::DATA_OBJECT()));
// is this the first request
if (!this->CurrentDivision)
{
// Tell the pipeline to start looping.
request->Set(vtkStreamingDemandDrivenPipeline::CONTINUE_EXECUTING(), 1);
this->AllocateOutputData(output, outInfo);
}
// actually copy the data
vtkInformation* inInfo = inputVector[0]->GetInformationObject(0);
vtkImageData *input =
vtkImageData::SafeDownCast(inInfo->Get(vtkDataObject::DATA_OBJECT()));
int inExt[6];
inInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_EXTENT(), inExt);
output->CopyAndCastFrom(input, inExt);
// update the progress
this->UpdateProgress(
static_cast<float>(this->CurrentDivision+1.0)
/static_cast<float>(this->NumberOfStreamDivisions));
this->CurrentDivision++;
if (this->CurrentDivision == this->NumberOfStreamDivisions)
{
// Tell the pipeline to stop looping.
request->Remove(vtkStreamingDemandDrivenPipeline::CONTINUE_EXECUTING());
this->CurrentDivision = 0;
}
return 1;
}
return this->Superclass::ProcessRequest(request, inputVector, outputVector);
}
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