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

  Program:   Visualization Toolkit
  Module:    vtkVolumeTextureMapper3D.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.

=========================================================================*/
#ifndef vtkVolumeTextureMapper3D_h
#define vtkVolumeTextureMapper3D_h

#include "vtkRenderingVolumeModule.h" // For export macro
#include "vtkVolumeMapper.h"

class vtkImageData;
class vtkColorTransferFunction;
class vtkPiecewiseFunction;
class vtkVolumeProperty;

class VTKRENDERINGVOLUME_EXPORT vtkVolumeTextureMapper3D : public vtkVolumeMapper
{
public:
  vtkTypeMacro(vtkVolumeTextureMapper3D,vtkVolumeMapper);
  void PrintSelf(ostream& os, vtkIndent indent);

  static vtkVolumeTextureMapper3D *New();


  vtkSetMacro( SampleDistance, float );
  vtkGetMacro( SampleDistance, float );


  vtkGetVectorMacro( VolumeDimensions, int,   3 );


  vtkGetVectorMacro( VolumeSpacing,    float, 3 );


  virtual int IsRenderSupported( vtkVolumeProperty *,
                                 vtkRenderer *vtkNotUsed(r))
    {return 0;}


  vtkGetMacro( NumberOfPolygons, int );


  vtkGetMacro( ActualSampleDistance, float );

//BTX

  virtual void Render(vtkRenderer *, vtkVolume *) {}


  enum
  {
    FRAGMENT_PROGRAM_METHOD=0,
    NVIDIA_METHOD=1,
    ATI_METHOD=2,
    NO_METHOD=3
  };


  int GetNumberOfScalarComponents(vtkImageData *input);
//ETX


  vtkSetClampMacro( PreferredRenderMethod, int,
                    vtkVolumeTextureMapper3D::FRAGMENT_PROGRAM_METHOD,
                    vtkVolumeTextureMapper3D::NVIDIA_METHOD );
  void SetPreferredMethodToFragmentProgram()
    { this->SetPreferredRenderMethod( vtkVolumeTextureMapper3D::FRAGMENT_PROGRAM_METHOD ); }
  void SetPreferredMethodToNVidia()
    { this->SetPreferredRenderMethod( vtkVolumeTextureMapper3D::NVIDIA_METHOD ); }
  vtkGetMacro(PreferredRenderMethod, int);



  vtkSetMacro(UseCompressedTexture,bool);
  vtkGetMacro(UseCompressedTexture,bool);

protected:
  vtkVolumeTextureMapper3D();
  ~vtkVolumeTextureMapper3D();

  float                    *PolygonBuffer;
  float                    *IntersectionBuffer;
  int                       NumberOfPolygons;
  int                       BufferSize;

  unsigned char            *Volume1;
  unsigned char            *Volume2;
  unsigned char            *Volume3;
  int                       VolumeSize;
  int                       VolumeComponents;
  int                       VolumeDimensions[3];
  float                     VolumeSpacing[3];

  float                     SampleDistance;
  float                     ActualSampleDistance;

  vtkImageData             *SavedTextureInput;
  vtkImageData             *SavedParametersInput;

  vtkColorTransferFunction *SavedRGBFunction;
  vtkPiecewiseFunction     *SavedGrayFunction;
  vtkPiecewiseFunction     *SavedScalarOpacityFunction;
  vtkPiecewiseFunction     *SavedGradientOpacityFunction;
  int                       SavedColorChannels;
  float                     SavedSampleDistance;
  float                     SavedScalarOpacityDistance;

  unsigned char             ColorLookup[65536*4];
  unsigned char             AlphaLookup[65536];
  float                     TempArray1[3*4096];
  float                     TempArray2[4096];
  int                       ColorTableSize;
  float                     ColorTableScale;
  float                     ColorTableOffset;

  unsigned char             DiffuseLookup[65536*4];
  unsigned char             SpecularLookup[65536*4];

  vtkTimeStamp              SavedTextureMTime;
  vtkTimeStamp              SavedParametersMTime;

  int                       RenderMethod;
  int                       PreferredRenderMethod;
  bool                      UseCompressedTexture;

  bool                      SupportsNonPowerOfTwoTextures;

  void   ComputePolygons( vtkRenderer *ren, vtkVolume *vol, double bounds[6] );


  int    UpdateVolumes( vtkVolume * );
  int    UpdateColorLookup( vtkVolume * );


  virtual int IsTextureSizeSupported(int vtkNotUsed(size)[3],
                                     int vtkNotUsed(components))
    {
      return 0;
    }
  //ETX

private:
  vtkVolumeTextureMapper3D(const vtkVolumeTextureMapper3D&);  // Not implemented.
  void operator=(const vtkVolumeTextureMapper3D&);  // Not implemented.
};


#endif