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/*=========================================================================
Program: Visualization Toolkit
Module: vtkImageSource.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 "vtkImageSource.h"
#include "vtkDataArray.h"
#include "vtkImageData.h"
#include "vtkInformation.h"
#include "vtkObjectFactory.h"
#include "vtkPointData.h"
//----------------------------------------------------------------------------
vtkImageSource::vtkImageSource()
{
// A source has no inputs by default.
this->SetNumberOfInputPorts(0);
this->vtkSource::SetNthOutput(0,vtkImageData::New());
// Releasing data for pipeline parallism.
// Filters will know it is empty.
this->Outputs[0]->ReleaseData();
this->Outputs[0]->Delete();
}
//----------------------------------------------------------------------------
// Specify the input data or filter.
void vtkImageSource::SetOutput(vtkImageData *output)
{
this->vtkSource::SetNthOutput(0, output);
}
//----------------------------------------------------------------------------
// Specify the input data or filter.
vtkImageData *vtkImageSource::GetOutput()
{
if (this->NumberOfOutputs < 1)
{
return NULL;
}
return static_cast<vtkImageData *>(this->Outputs[0]);
}
//----------------------------------------------------------------------------
// Convert to Imaging API
void vtkImageSource::Execute()
{
vtkImageData *output = this->GetOutput();
// If we have multiple Outputs, they need to be allocate
// in a subclass. We cannot be sure all outputs are images.
output->SetExtent(output->GetUpdateExtent());
output->AllocateScalars();
output->GetPointData()->GetScalars()->SetName("Scalars");
this->Execute(this->GetOutput());
}
//----------------------------------------------------------------------------
// This function can be defined in a subclass to generate the data
// for a region.
void vtkImageSource::Execute(vtkImageData *)
{
vtkErrorMacro(<< "Execute(): Method not defined.");
}
//----------------------------------------------------------------------------
vtkImageData *vtkImageSource::AllocateOutputData(vtkDataObject *out)
{
vtkImageData *res = vtkImageData::SafeDownCast(out);
if (!res)
{
vtkWarningMacro("Call to AllocateOutputData with non vtkImageData output");
return NULL;
}
// I would like to eliminate this method which requires extra "information"
// That is not computed in the graphics pipeline.
// Until I can eliminate the method, I will reexecute the ExecuteInformation
// before the execute.
this->ExecuteInformation();
res->SetExtent(res->GetUpdateExtent());
res->AllocateScalars();
return res;
}
//----------------------------------------------------------------------------
vtkImageData *vtkImageSource::GetOutput(int idx)
{
return static_cast<vtkImageData *>(this->vtkSource::GetOutput(idx));
}
//----------------------------------------------------------------------------
int vtkImageSource::FillOutputPortInformation(int port, vtkInformation* info)
{
if(!this->Superclass::FillOutputPortInformation(port, info))
{
return 0;
}
info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkImageData");
return 1;
}
//----------------------------------------------------------------------------
void vtkImageSource::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
}