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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkImageStencilSource.h,v $
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.
=========================================================================*/
// .NAME vtkImageStencilSource - helper class for clipping images
// .SECTION Description
// vtkImageStencilSource is a helper class for vtkImageToImageFilter
// classes. Given a clipping object such as a vtkImplicitFunction, it
// will set up a list of clipping extents for each x-row through the
// image data. The extents for each x-row can be retrieved via the
// GetNextExtent() method after the extent lists have been built
// with the BuildExtents() method. For large images, using clipping
// extents is much more memory efficient (and slightly more time-efficient)
// than building a mask. This class can be subclassed to allow clipping
// with objects other than vtkImplicitFunction.
// .SECTION see also
// vtkImplicitFunction vtkImageStencil vtkPolyDataToImageStencil
#ifndef __vtkImageStencilSource_h
#define __vtkImageStencilSource_h
#include "vtkAlgorithm.h"
class vtkImageStencilData;
class VTK_IMAGING_EXPORT vtkImageStencilSource : public vtkAlgorithm
{
public:
static vtkImageStencilSource *New();
vtkTypeRevisionMacro(vtkImageStencilSource, vtkAlgorithm);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Get or set the output for this source.
void SetOutput(vtkImageStencilData *output);
vtkImageStencilData *GetOutput();
// Description:
// see vtkAlgorithm for details
virtual int ProcessRequest(vtkInformation*,
vtkInformationVector**,
vtkInformationVector*);
protected:
vtkImageStencilSource();
~vtkImageStencilSource();
virtual int RequestData(vtkInformation *, vtkInformationVector **,
vtkInformationVector *);
virtual int RequestInformation(vtkInformation *, vtkInformationVector **,
vtkInformationVector *) { return 1; }
virtual int RequestUpdateExtent(vtkInformation *, vtkInformationVector **,
vtkInformationVector *) { return 1; }
vtkImageStencilData *AllocateOutputData(vtkDataObject *out, int* updateExt);
virtual int FillOutputPortInformation(int, vtkInformation*);
private:
vtkImageStencilSource(const vtkImageStencilSource&); // Not implemented.
void operator=(const vtkImageStencilSource&); // Not implemented.
};
#endif
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