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Common/vtkDataObject.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkDataObject.h,v $
  Language:  C++


Copyright (c) 1993-2001 Ken Martin, Will Schroeder, Bill Lorensen 
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

 * Redistributions of source code must retain the above copyright notice,
   this list of conditions and the following disclaimer.

 * Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

 * Neither name of Ken Martin, Will Schroeder, or Bill Lorensen nor the names
   of any contributors may be used to endorse or promote products derived
   from this software without specific prior written permission.

 * Modified source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

=========================================================================*/
#ifndef __vtkDataObject_h
#define __vtkDataObject_h

#include "vtkObject.h"
#include "vtkFieldData.h"

class vtkProcessObject;
class vtkSource;
class vtkExtentTranslator;

#define VTK_PIECES_EXTENT   0
#define VTK_3D_EXTENT       1

class VTK_COMMON_EXPORT vtkDataObject : public vtkObject
{
public:
  static vtkDataObject *New();

  vtkTypeMacro(vtkDataObject,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  virtual vtkDataObject *MakeObject() {return vtkDataObject::New();}


  vtkGetObjectMacro(Source,vtkSource);
  void SetSource(vtkSource *s);
  
  unsigned long int GetMTime();

  // Rescription:
  // Restore data object to initial state,
  virtual void Initialize();

  void ReleaseData();

  int ShouldIReleaseData();


  vtkGetMacro(DataReleased,int);
  

  vtkSetMacro(ReleaseDataFlag,int);
  vtkGetMacro(ReleaseDataFlag,int);
  vtkBooleanMacro(ReleaseDataFlag,int);


  static void SetGlobalReleaseDataFlag(int val);
  void GlobalReleaseDataFlagOn() {this->SetGlobalReleaseDataFlag(1);};
  void GlobalReleaseDataFlagOff() {this->SetGlobalReleaseDataFlag(0);};
  static int GetGlobalReleaseDataFlag();


  vtkSetObjectMacro(FieldData,vtkFieldData);
  vtkGetObjectMacro(FieldData,vtkFieldData);
  
  // Handle the source/data loop.
  void UnRegister(vtkObject *o);

  virtual int GetNetReferenceCount() {return this->ReferenceCount;};

  virtual void Update();

  virtual void UpdateInformation();

  virtual void PropagateUpdateExtent();

  virtual void TriggerAsynchronousUpdate();

  virtual void UpdateData();

  virtual unsigned long GetEstimatedMemorySize();


  virtual void SetUpdateExtent(int vtkNotUsed(piece),int vtkNotUsed(numPieces),
                               int vtkNotUsed(ghostLevel))
    {vtkErrorMacro("Subclass did not implement 'SetUpdateExtent'");}
  void SetUpdateExtent(int piece, int numPieces)
    {this->SetUpdateExtent(piece, numPieces, 0);}


  virtual void SetUpdateExtent(int x1, int x2, int y1, int y2, int z1, int z2);
  virtual void SetUpdateExtent( int ext[6] );
  vtkGetVector6Macro( UpdateExtent, int );

  virtual int GetDataObjectType() {return VTK_DATA_OBJECT;}
  
  unsigned long GetUpdateTime();

  void SetUpdateExtentToWholeExtent();

  void SetPipelineMTime(unsigned long time) {this->PipelineMTime = time; }
  vtkGetMacro(PipelineMTime, unsigned long);

  virtual unsigned long GetActualMemorySize();

  void CopyInformation( vtkDataObject *data );


  virtual void CopyTypeSpecificInformation( vtkDataObject *data ) 
    {this->CopyInformation( data );};
  

  void SetUpdatePiece(int piece);
  void SetUpdateNumberOfPieces(int num);
  vtkGetMacro( UpdatePiece, int );
  vtkGetMacro( UpdateNumberOfPieces, int );
  

  void SetUpdateGhostLevel(int level);
  vtkGetMacro(UpdateGhostLevel, int);
  

  void SetRequestExactExtent(int v);
  vtkGetMacro(RequestExactExtent, int);
  vtkBooleanMacro(RequestExactExtent, int);
  

  vtkSetVector6Macro( WholeExtent, int );
  vtkGetVector6Macro( WholeExtent, int );
  

  vtkSetMacro( MaximumNumberOfPieces, int );
  vtkGetMacro( MaximumNumberOfPieces, int );

  void DataHasBeenGenerated();

  virtual void PrepareForNewData() {this->Initialize();};


  virtual void ShallowCopy(vtkDataObject *src);  
  virtual void DeepCopy(vtkDataObject *src);


  vtkSetMacro(Locality, float);
  vtkGetMacro(Locality, float);


  void SetExtentTranslator(vtkExtentTranslator *translator);
  vtkExtentTranslator *GetExtentTranslator();  


  vtkGetMacro(NumberOfConsumers,int);
  

  void AddConsumer(vtkProcessObject *c);
  void RemoveConsumer(vtkProcessObject *c);
  vtkProcessObject *GetConsumer(int i);
  int IsConsumer(vtkProcessObject *c);

  
protected:

  vtkDataObject();
  ~vtkDataObject();

  // General field data associated with data object      
  vtkFieldData  *FieldData;  

  // Who generated this data as output?
  vtkSource     *Source;     

  // Keep track of data release during network execution
  int DataReleased; 

  // how many consumers does this object have
  int NumberOfConsumers;
  vtkProcessObject **Consumers;
  
  int UpdateExtentIsOutsideOfTheExtent();
  
  int UpdateExtentIsEmpty();
  
  virtual int VerifyUpdateExtent();

  // The ExtentType will be left as VTK_PIECES_EXTENT for data objects 
  // such as vtkPolyData and vtkUnstructuredGrid. The ExtentType will be 
  // changed to VTK_3D_EXTENT for data objects with 3D structure such as 
  // vtkImageData (and its subclass vtkStructuredPoints), vtkRectilinearGrid,
  // and vtkStructuredGrid. The default is the have an extent in pieces,
  // with only one piece (no streaming possible).
  virtual int GetExtentType() { return VTK_PIECES_EXTENT; };

  // If the ExtentType is VTK_3D_EXTENT, then these three extent variables
  // represent the whole extent, the extent currently in memory, and the
  // requested update extent. The extent is given as 3 min/max pairs.
  int WholeExtent[6];
  int Extent[6];
  int UpdateExtent[6];
  // First update, the update extent will be set to the whole extent.
  unsigned char UpdateExtentInitialized;  
  // An object to translate from unstructured pieces to structured extents.
  vtkExtentTranslator *ExtentTranslator;
 
  // Unstructured request stuff
  int NumberOfPieces;
  int Piece;
  int MaximumNumberOfPieces;
  int UpdateNumberOfPieces;
  int UpdatePiece;
  
  // This request flag indicates whether the requester can handle 
  // more data than requested.  Right now it is used in vtkImageData.
  // Image filters can return more data than requested.  The the 
  // consumer cannot handle this (i.e. DataSetToDataSetFitler)
  // this image will crop itself.  This functionality used to be in 
  // ImageToStructuredPoints.
  int RequestExactExtent;

  // This method crops the data object (if necesary) so that the extent
  // matches the update extent.
  virtual void Crop();
  
  int GhostLevel;
  int UpdateGhostLevel;

  // Data will release after use by a filter if this flag is set
  int ReleaseDataFlag; 

  // When was this data last generated?
  vtkTimeStamp UpdateTime;  

  // The Maximum MTime of all upstream filters and data objects.
  // This does not include the MTime of this data object.
  unsigned long PipelineMTime;

  // Was the update extent propagated down the pipeline
  int LastUpdateExtentWasOutsideOfTheExtent;
  
  // A value indicating whether we have a port upstream and how
  // many filters removed it is.  
  // 0.0 : no ports.
  // 1.0 : my source is a port.
  // 0.5 : the next upstream filter is a port ...
  float Locality;  

private:
  // Helper method for the ShallowCopy and DeepCopy methods.
  void InternalDataObjectCopy(vtkDataObject *src);
private:
  vtkDataObject(const vtkDataObject&);  // Not implemented.
  void operator=(const vtkDataObject&);  // Not implemented.
};

#endif

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