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vtkTrivialProducer.h
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vtkTrivialProducer.h
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/*=========================================================================
Program: Visualization Toolkit
Module: vtkTrivialProducer.h
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.
=========================================================================*/
/**
* @class vtkTrivialProducer
* @brief Producer for stand-alone data objects.
*
* vtkTrivialProducer allows stand-alone data objects to be connected
* as inputs in a pipeline. All data objects that are connected to a
* pipeline involving vtkAlgorithm must have a producer. This trivial
* producer allows data objects that are hand-constructed in a program
* without another vtk producer to be connected.
*/
#ifndef vtkTrivialProducer_h
#define vtkTrivialProducer_h
#include "vtkAlgorithm.h"
#include "vtkCommonExecutionModelModule.h" // For export macro
class vtkDataObject;
class VTKCOMMONEXECUTIONMODEL_EXPORT vtkTrivialProducer : public vtkAlgorithm
{
public:
static vtkTrivialProducer* New();
vtkTypeMacro(vtkTrivialProducer, vtkAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent) override;
/**
* Process upstream/downstream requests trivially. The associated
* output data object is never modified, but it is queried to
* fulfill requests.
*/
vtkTypeBool ProcessRequest(
vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;
/**
* Set the data object that is "produced" by this producer. It is
* never really modified.
*/
virtual void SetOutput(vtkDataObject* output);
/**
* The modified time of this producer is the newer of this object or
* the assigned output.
*/
vtkMTimeType GetMTime() override;
///@{
/**
* Set the whole extent to use for the data this producer is producing.
* This may be different than the extent of the output data when
* the trivial producer is used in parallel.
*/
vtkSetVector6Macro(WholeExtent, int);
vtkGetVector6Macro(WholeExtent, int);
///@}
/**
* This method can be used to copy meta-data from an existing data
* object to an information object. For example, whole extent,
* image data spacing, origin etc.
*/
static void FillOutputDataInformation(vtkDataObject* output, vtkInformation* outInfo);
protected:
vtkTrivialProducer();
~vtkTrivialProducer() override;
int FillInputPortInformation(int, vtkInformation*) override;
int FillOutputPortInformation(int, vtkInformation*) override;
vtkExecutive* CreateDefaultExecutive() override;
// The real data object.
vtkDataObject* Output;
int WholeExtent[6];
void ReportReferences(vtkGarbageCollector*) override;
private:
vtkTrivialProducer(const vtkTrivialProducer&) = delete;
void operator=(const vtkTrivialProducer&) = delete;
};
#endif