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/*=========================================================================
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.kitware.com/VolViewCopyright.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 vtkImageStencilDataFlip flips a vtkImageStencilData
//
// .SECTION Description
// vtkImageStencilDataFlip will create a stencil with complementary extents.
//
// There are subtle differences between this class and just using a
//
// \code
// vtkImageStencilData->GetNextExtent (...,..., iter = -1)
// \endcode
//
// This class can return an inverted stencil with much larger extents than
// the one specified.
//
// .SECTION Motivation
// This class was written as one of a collection of classes intented for contour
// segmentation. The user would draw a contour and the contour would be
// rasterized. The rasterization was done only within the extents of the
// contour, to save time. The rasterization resulted in a \c vtkImageStencilData
// with extents the same as the contour. We then needed a class that could
// conveniently flip stencils to give us the the regions outside the contour,
// (since a segmentation might cut away or cut everything but the contour).
// The stencil needed to be flipped not with respect to the extents of the
// stencil data itself, but with respect to the extents of the image, (the
// extents of the image can be much larger than the one of the contour).
//
// .SECTION Parameters and Usage
// There are 2 ways to use this class.
//
// 1. To flip a vtkImageStencilData
// \code
// myvtkImageStencilDataFlip->SetInput( myvtkImageStencilData );
// myvtkImageStencilDataFlip->Update();
// myFlippedStencilData = myvtkImageStencilDataFlip->GetOutput();
// \endcode
//
// 2. To flip with respect to a larger extent.
// \code
// myvtkImageStencilDataFlip->SetInput( myvtkImageStencilData );
// myvtkImageStencilDataFlip->SetFlipExtent(sliceExtent);
// myvtkImageStencilDataFlip->Update();
// myFlippedStencilData = myvtkImageStencilDataFlip->GetOutput();
// \endcode
//
#ifndef __vtkImageStencilDataFlip_h
#define __vtkImageStencilDataFlip_h
#include "vtkImageStencilSource.h"
class VTK_EXPORT vtkImageStencilDataFlip : public vtkImageStencilSource
{
public:
static vtkImageStencilDataFlip *New();
vtkTypeRevisionMacro( vtkImageStencilDataFlip, vtkImageStencilSource );
void PrintSelf(ostream &os, vtkIndent indent);
// Description:
// Specify the stencil data to invert
void SetInput(vtkImageStencilData *input);
vtkImageStencilData *GetInput();
// Description:
// Optionally you may specify extents that are larger than the current
// extents of the stencil. (Repeat LARGER, no checking is performed to
// ensure this). If this is done, the stencil will be flipped with
// respect to these extents. (The extents computed are such that anything
// outside the stencil or outside the extents of the stencilData set as
// input via SetInput() is 1. Everything within the stencil is 0). If no
// extents are set, the extents of the stencil are used.
vtkSetVector6Macro(FlipExtent, int);
vtkGetVector6Macro(FlipExtent, int);
protected:
vtkImageStencilDataFlip();
~vtkImageStencilDataFlip();
virtual int RequestData(vtkInformation *, vtkInformationVector **,
vtkInformationVector *);
// The input extent is the same as the one for the stencil data. The ouptut
// extent should not always be copied to the input. The output extent will
// be the FlipExtent if one is specified; if not specified, it will be the
// same as the input stencil
virtual int RequestUpdateExtent (vtkInformation *, vtkInformationVector **,
vtkInformationVector *);
virtual int RequestInformation( vtkInformation *, vtkInformationVector **,
vtkInformationVector *outputVector);
// Specify explicitly that we can handle only ImageStencilData as input.
virtual int FillInputPortInformation(int, vtkInformation*);
int FlipExtent[6];
private:
vtkImageStencilDataFlip(const vtkImageStencilDataFlip&); // Not implemented.
void operator=(const vtkImageStencilDataFlip&); // Not implemented.
};
#endif
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