dox/Rendering/vtkMesaImageSliceMapper.h

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

  Program:   Visualization Toolkit
  Module:    vtkMesaImageSliceMapper.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 __vtkMesaImageSliceMapper_h
#define __vtkMesaImageSliceMapper_h

#include "vtkImageSliceMapper.h"

class vtkWindow;
class vtkRenderer;
class vtkRenderWindow;
class vtkMesaRenderWindow;
class vtkImageSlice;
class vtkImageProperty;
class vtkImageData;

class VTK_RENDERING_EXPORT vtkMesaImageSliceMapper :
  public vtkImageSliceMapper
{
public:
  static vtkMesaImageSliceMapper *New();
  vtkTypeMacro(vtkMesaImageSliceMapper,vtkImageSliceMapper);
  virtual void PrintSelf(ostream& os, vtkIndent indent);

  void Render(vtkRenderer *ren, vtkImageSlice *prop);

  void ReleaseGraphicsResources(vtkWindow *);

protected:
  vtkMesaImageSliceMapper();
  ~vtkMesaImageSliceMapper();


  void RenderColorAndLighting(
    double red, double green, double blue,
    double alpha, double ambient, double diffuse);

  void RenderBackingPolygon();


  void RecursiveRenderTexturedPolygon(
    vtkRenderer *ren, vtkImageProperty *property,
    vtkImageData *image, int extent[6], bool recursive);


  void RenderTexturedPolygon(
    vtkRenderer *ren, vtkImageProperty *property,
    vtkImageData *image, int extent[6], bool recursive);

  vtkStdString BuildFragmentProgram(vtkImageProperty *property);


  void ComputeTextureSize(
    const int extent[6], int &xdim, int &ydim,
    int imageSize[2], int textureSize[2]);

  bool TextureSizeOK(const int size[2]);

  void CheckOpenGLCapabilities(vtkMesaRenderWindow *renWin);

  long Index; // OpenGL ID for texture or display list
  long FragmentShaderIndex; // OpenGL ID for fragment shader
  vtkRenderWindow *RenderWindow; // RenderWindow used for previous render
  int TextureSize[2];
  int TextureBytesPerPixel;
  int LastOrientation;
  int LastSliceNumber;

  vtkTimeStamp LoadTime;
  int LoadCount;

  bool UsePowerOfTwoTextures;
  bool UseClampToEdge;
  bool UseFragmentProgram;

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

#endif