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

  Program:   Visualization Toolkit
  Module:    vtkRayCastImageDisplayHelper.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 vtkRayCastImageDisplayHelper_h
#define vtkRayCastImageDisplayHelper_h

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

class vtkFixedPointRayCastImage;
class vtkRenderer;
class vtkVolume;
class vtkWindow;

class VTKRENDERINGVOLUME_EXPORT vtkRayCastImageDisplayHelper : public vtkObject
{
public:
  static vtkRayCastImageDisplayHelper *New();
  vtkTypeMacro(vtkRayCastImageDisplayHelper,vtkObject);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  virtual void RenderTexture( vtkVolume *vol, vtkRenderer *ren,
                              int imageMemorySize[2],
                              int imageViewportSize[2],
                              int imageInUseSize[2],
                              int imageOrigin[2],
                              float requestedDepth,
                              unsigned char *image ) = 0;

  virtual void RenderTexture( vtkVolume *vol, vtkRenderer *ren,
                              int imageMemorySize[2],
                              int imageViewportSize[2],
                              int imageInUseSize[2],
                              int imageOrigin[2],
                              float requestedDepth,
                              unsigned short *image ) = 0;

  virtual void RenderTexture( vtkVolume *vol, vtkRenderer *ren,
                              vtkFixedPointRayCastImage *image,
                              float requestedDepth ) = 0;

  vtkSetClampMacro( PreMultipliedColors, int, 0, 1 );
  vtkGetMacro( PreMultipliedColors, int );
  vtkBooleanMacro( PreMultipliedColors, int );



  vtkSetMacro( PixelScale, float );
  vtkGetMacro( PixelScale, float );

  virtual void ReleaseGraphicsResources(vtkWindow *) { }

protected:
  vtkRayCastImageDisplayHelper();
  ~vtkRayCastImageDisplayHelper();

  int PreMultipliedColors;

  float PixelScale;

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

#endif