dox/Rendering/vtkOpenGLRenderWindow.h

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

Program:   Visualization Toolkit
Module:    $RCSfile: vtkOpenGLRenderWindow.h,v $

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 __vtkOpenGLRenderWindow_h
#define __vtkOpenGLRenderWindow_h

#include "vtkRenderWindow.h"

#include "vtkOpenGL.h" // Needed for GLuint.

class vtkIdList;

class VTK_RENDERING_EXPORT vtkOpenGLRenderWindow : public vtkRenderWindow
{
protected:
  long OldMonitorSetting;

public:
  vtkTypeRevisionMacro(vtkOpenGLRenderWindow,vtkRenderWindow);
  void PrintSelf(ostream& os, vtkIndent indent);


  static void SetGlobalMaximumNumberOfMultiSamples(int val);
  static int  GetGlobalMaximumNumberOfMultiSamples();

  virtual void StereoUpdate();


  virtual unsigned char *GetPixelData(int x,int y,int x2,int y2,int front);
  virtual int GetPixelData(int x,int y,int x2,int y2, int front,
                           vtkUnsignedCharArray *data);
  virtual int SetPixelData(int x,int y,int x2,int y2,unsigned char *data,
                           int front);
  virtual int SetPixelData(int x,int y,int x2,int y2,
                           vtkUnsignedCharArray *data, int front);


  virtual float *GetRGBAPixelData(int x,int y,int x2,int y2,int front);
  virtual int GetRGBAPixelData(int x,int y,int x2,int y2, int front,
                               vtkFloatArray* data);
  virtual int SetRGBAPixelData(int x,int y,int x2,int y2, float *data,
                               int front, int blend=0);
  virtual int SetRGBAPixelData(int x,int y,int x2,int y2, vtkFloatArray *data,
                               int front, int blend=0);
  virtual void ReleaseRGBAPixelData(float *data);
  virtual unsigned char *GetRGBACharPixelData(int x,int y,int x2,int y2,
                                              int front);
  virtual int GetRGBACharPixelData(int x,int y,int x2,int y2, int front,
                                   vtkUnsignedCharArray *data);
  virtual int SetRGBACharPixelData(int x, int y, int x2, int y2,
                                   unsigned char *data, int front,
                                   int blend=0);  
  virtual int SetRGBACharPixelData(int x,int y,int x2,int y2,
                                   vtkUnsignedCharArray *data, int front,
                                   int blend=0);  


  virtual float *GetZbufferData( int x1, int y1, int x2, int y2 );
  virtual int GetZbufferData( int x1, int y1, int x2, int y2, float* z );
  virtual int GetZbufferData( int x1, int y1, int x2, int y2,
                              vtkFloatArray* z );
  virtual int SetZbufferData( int x1, int y1, int x2, int y2, float *buffer );
  virtual int SetZbufferData( int x1, int y1, int x2, int y2,
                              vtkFloatArray *buffer );

  void MakeCurrent() = 0;
  
  void RegisterTextureResource (GLuint id);

  int GetDepthBufferSize();

  int GetColorBufferSizes(int *rgba);
  
  virtual void OpenGLInit();

  unsigned int GetBackLeftBuffer();
  
  unsigned int GetBackRightBuffer();
  
  unsigned int GetFrontLeftBuffer();
  
  unsigned int GetFrontRightBuffer();
  
  unsigned int GetBackBuffer();
  
  unsigned int GetFrontBuffer();
  
  virtual void CheckGraphicError();
  
  virtual int HasGraphicError();
  
  virtual const char *GetLastGraphicErrorString();


  vtkGetMacro(ContextCreationTime, vtkTimeStamp);
protected:
  vtkOpenGLRenderWindow();
  ~vtkOpenGLRenderWindow();
  
  vtkIdList *TextureResourceIds;

  int GetPixelData(int x,int y,int x2,int y2,int front, unsigned char* data);
  int GetRGBAPixelData(int x,int y,int x2,int y2, int front, float* data);
  int GetRGBACharPixelData(int x,int y,int x2,int y2, int front,
                           unsigned char* data);
  
  int CreateHardwareOffScreenWindow(int width, int height);
  
  void DestroyHardwareOffScreenWindow();
  
  int OffScreenUseFrameBuffer;
  

  int NumberOfFrameBuffers;
  unsigned int TextureObjects[4]; // really GLuint
  unsigned int FrameBufferObject; // really GLuint
  unsigned int DepthRenderBufferObject; // really GLuint
  
  virtual void CreateAWindow()=0;
  
  virtual void DestroyWindow()=0;
  
  unsigned int BackLeftBuffer;
  unsigned int BackRightBuffer;
  unsigned int FrontLeftBuffer;
  unsigned int FrontRightBuffer;
  unsigned int FrontBuffer;
  unsigned int BackBuffer;
  
  // Actual type is GLenum. Last value returned by glGetError().
  unsigned int LastGraphicError;
 
  vtkTimeStamp ContextCreationTime;
private:
  vtkOpenGLRenderWindow(const vtkOpenGLRenderWindow&);  // Not implemented.
  void operator=(const vtkOpenGLRenderWindow&);  // Not implemented.
};

#endif

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