dox/Rendering/vtkOpenGLRenderer.h

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

  Program:   Visualization Toolkit
  Module:    vtkOpenGLRenderer.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 __vtkOpenGLRenderer_h
#define __vtkOpenGLRenderer_h

#include "vtkRenderer.h"

class vtkOpenGLRendererLayerList; // Pimpl
class vtkShaderProgram2;

class VTK_RENDERING_EXPORT vtkOpenGLRenderer : public vtkRenderer
{
protected:
  int NumberOfLightsBound;

public:
  static vtkOpenGLRenderer *New();
  vtkTypeMacro(vtkOpenGLRenderer,vtkRenderer);
  void PrintSelf(ostream& os, vtkIndent indent);

  void DeviceRender(void);
  
  virtual void DeviceRenderTranslucentPolygonalGeometry();
  
  void ClearLights(void);

  void Clear(void);

  int UpdateLights(void);
  
  int GetDepthPeelingHigherLayer();
  
  //BTX
 */
  vtkGetObjectMacro(ShaderProgram,vtkShaderProgram2);
  virtual void SetShaderProgram(vtkShaderProgram2 *program);
  //ETX
  
protected:
  vtkOpenGLRenderer();
  ~vtkOpenGLRenderer();
  
  void CheckCompilation(unsigned int fragmentShader);
  
  //BTX
  // Picking functions to be implemented by sub-classes
  virtual void DevicePickRender();
  virtual void StartPick(unsigned int pickFromSize);
  virtual void UpdatePickId();
  virtual void DonePick();
  virtual unsigned int GetPickedId();
  virtual unsigned int GetNumPickedIds();
  virtual int GetPickedIds(unsigned int atMost, unsigned int *callerBuffer);
  virtual double GetPickedZ();
  // Ivars used in picking
  class vtkGLPickInfo* PickInfo;
  //ETX
  double PickedZ;
 
  int RenderPeel(int layer);
  
  //BTX
  friend class vtkOpenGLProperty;
  friend class vtkOpenGLTexture;
  friend class vtkOpenGLImageSliceMapper;
  friend class vtkOpenGLImageResliceMapper;
  //ETX
  
  int GetUseTextureUniformVariable();
  
  int GetTextureUniformVariable();
  
  int DepthPeelingIsSupported;
  
  int DepthPeelingIsSupportedChecked;
  
  vtkOpenGLRendererLayerList *LayerList;
  
  unsigned int OpaqueLayerZ;
  unsigned int TransparentLayerZ;
  unsigned int ProgramShader;
  

  int ViewportX;
  int ViewportY;
  int ViewportWidth;
  int ViewportHeight;
  
  unsigned int DepthFormat;
  
  // Is rendering at translucent geometry stage using depth peeling and
  // rendering a layer other than the first one? (Boolean value)
  // If so, the uniform variables UseTexture and Texture can be set.
  // (Used by vtkOpenGLProperty or vtkOpenGLTexture)
  int DepthPeelingHigherLayer;
  
  vtkShaderProgram2 *ShaderProgram;
  
private:
  vtkOpenGLRenderer(const vtkOpenGLRenderer&);  // Not implemented.
  void operator=(const vtkOpenGLRenderer&);  // Not implemented.
};

#endif