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124 lines
3.7 KiB
124 lines
3.7 KiB
/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkImageSource.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkImageSource.h"
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#include "vtkImageData.h"
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#include "vtkInformation.h"
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#include "vtkObjectFactory.h"
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#include "vtkPointData.h"
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vtkCxxRevisionMacro(vtkImageSource, "$Revision: 1.62 $");
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//----------------------------------------------------------------------------
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vtkImageSource::vtkImageSource()
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{
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// A source has no inputs by default.
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this->SetNumberOfInputPorts(0);
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this->vtkSource::SetNthOutput(0,vtkImageData::New());
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// Releasing data for pipeline parallism.
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// Filters will know it is empty.
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this->Outputs[0]->ReleaseData();
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this->Outputs[0]->Delete();
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}
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//----------------------------------------------------------------------------
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// Specify the input data or filter.
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void vtkImageSource::SetOutput(vtkImageData *output)
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{
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this->vtkSource::SetNthOutput(0, output);
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}
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//----------------------------------------------------------------------------
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// Specify the input data or filter.
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vtkImageData *vtkImageSource::GetOutput()
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{
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if (this->NumberOfOutputs < 1)
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{
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return NULL;
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}
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return (vtkImageData *)(this->Outputs[0]);
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}
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//----------------------------------------------------------------------------
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// Convert to Imaging API
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void vtkImageSource::Execute()
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{
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vtkImageData *output = this->GetOutput();
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// If we have multiple Outputs, they need to be allocate
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// in a subclass. We cannot be sure all outputs are images.
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output->SetExtent(output->GetUpdateExtent());
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output->AllocateScalars();
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output->GetPointData()->GetScalars()->SetName("Scalars");
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this->Execute(this->GetOutput());
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}
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//----------------------------------------------------------------------------
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// This function can be defined in a subclass to generate the data
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// for a region.
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void vtkImageSource::Execute(vtkImageData *)
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{
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vtkErrorMacro(<< "Execute(): Method not defined.");
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}
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//----------------------------------------------------------------------------
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vtkImageData *vtkImageSource::AllocateOutputData(vtkDataObject *out)
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{
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vtkImageData *res = vtkImageData::SafeDownCast(out);
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if (!res)
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{
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vtkWarningMacro("Call to AllocateOutputData with non vtkImageData output");
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return NULL;
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}
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// I would like to eliminate this method which requires extra "information"
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// That is not computed in the graphics pipeline.
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// Until I can eliminate the method, I will reexecute the ExecuteInformation
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// before the execute.
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this->ExecuteInformation();
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res->SetExtent(res->GetUpdateExtent());
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res->AllocateScalars();
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return res;
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}
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//----------------------------------------------------------------------------
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vtkImageData *vtkImageSource::GetOutput(int idx)
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{
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return (vtkImageData *) this->vtkSource::GetOutput(idx);
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}
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//----------------------------------------------------------------------------
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int vtkImageSource::FillOutputPortInformation(int port, vtkInformation* info)
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{
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if(!this->Superclass::FillOutputPortInformation(port, info))
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{
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return 0;
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}
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info->Set(vtkDataObject::DATA_TYPE_NAME(), "vtkImageData");
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return 1;
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}
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//----------------------------------------------------------------------------
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void vtkImageSource::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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}
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