vtkOpenGLRenderWindow.h

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

  Program:   Visualization Toolkit
  Module:    vtkOpenGLRenderWindow.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 vtkOpenGLRenderWindow_h
#define vtkOpenGLRenderWindow_h

#include "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkRenderWindow.h"
#include "vtkOpenGL.h" // Needed for GLuint.

class vtkIdList;
class vtkOpenGLExtensionManager;
class vtkOpenGLHardwareSupport;
class vtkTextureUnitManager;
class vtkStdString;

class VTKRENDERINGOPENGL_EXPORT vtkOpenGLRenderWindow : public vtkRenderWindow
{
public:
  vtkTypeMacro(vtkOpenGLRenderWindow, vtkRenderWindow);
  void PrintSelf(ostream& os, vtkIndent indent);


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

  virtual const char *GetRenderingBackend();

  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 RegisterTextureResource (GLuint id);

  int GetDepthBufferSize();

  int GetColorBufferSizes(int *rgba);


  virtual void SetSize(int a[2]);
  virtual void SetSize(int,int);

  virtual void OpenGLInit();

  // Initialize the state of OpenGL that VTK wants for this window
  virtual void OpenGLInitState();

  // Initialize VTK for rendering in a new OpenGL context
  virtual void OpenGLInitContext();

  unsigned int GetBackLeftBuffer();

  unsigned int GetBackRightBuffer();

  unsigned int GetFrontLeftBuffer();

  unsigned int GetFrontRightBuffer();

  unsigned int GetBackBuffer();

  unsigned int GetFrontBuffer();

  virtual vtkMTimeType GetContextCreationTime();

  vtkOpenGLExtensionManager* GetExtensionManager();

  vtkOpenGLHardwareSupport* GetHardwareSupport();

  vtkTextureUnitManager *GetTextureUnitManager();

  virtual void WaitForCompletion();


  virtual int SetUseOffScreenBuffers(bool offScreen);
  virtual bool GetUseOffScreenBuffers();

protected:
  vtkOpenGLRenderWindow();
  ~vtkOpenGLRenderWindow();

  long OldMonitorSetting;
  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);

  int CreateHardwareOffScreenBuffers(int width, int height, bool bind = false);
  void BindHardwareOffScreenBuffers();

  void DestroyHardwareOffScreenWindow();

  void UnbindHardwareOffScreenBuffers();
  void DestroyHardwareOffScreenBuffers();

  int OffScreenUseFrameBuffer;


  int NumberOfFrameBuffers;
  unsigned int TextureObjects[4]; // really GLuint
  unsigned int FrameBufferObject; // really GLuint
  unsigned int DepthRenderBufferObject; // really GLuint
  int HardwareBufferSize[2];
  bool HardwareOffScreenBuffersBind;

  virtual void CreateAWindow() = 0;

  virtual void DestroyWindow() = 0;

  void SetTextureUnitManager(vtkTextureUnitManager *textureUnitManager);

  unsigned int BackLeftBuffer;
  unsigned int BackRightBuffer;
  unsigned int FrontLeftBuffer;
  unsigned int FrontRightBuffer;
  unsigned int FrontBuffer;
  unsigned int BackBuffer;

  int OwnContext;

  vtkTimeStamp ContextCreationTime;

  vtkTextureUnitManager *TextureUnitManager;

private:
  vtkOpenGLRenderWindow(const vtkOpenGLRenderWindow&) VTK_DELETE_FUNCTION;
  void operator=(const vtkOpenGLRenderWindow&) VTK_DELETE_FUNCTION;

  void SetExtensionManager(vtkOpenGLExtensionManager*);
  void SetHardwareSupport(vtkOpenGLHardwareSupport * renderWindow);

  vtkOpenGLExtensionManager* ExtensionManager;
  vtkOpenGLHardwareSupport* HardwareSupport;
};

#endif