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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.
=========================================================================*/
// .NAME vtkOpenGLRenderWindow - OpenGL rendering window
// .SECTION Description
// vtkOpenGLRenderWindow is a concrete implementation of the abstract class
// vtkRenderWindow. vtkOpenGLRenderer interfaces to the OpenGL graphics
// library. Application programmers should normally use vtkRenderWindow
// instead of the OpenGL specific version.
#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);
// Description:
// Set/Get the maximum number of multisamples
static void SetGlobalMaximumNumberOfMultiSamples(int val);
static int GetGlobalMaximumNumberOfMultiSamples();
// Description:
// Update system if needed due to stereo rendering.
virtual void StereoUpdate();
// Description:
// Set/Get the pixel data of an image, transmitted as RGBRGB...
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);
// Description:
// Set/Get the pixel data of an image, transmitted as RGBARGBA...
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);
// Description:
// Set/Get the zbuffer data from an image
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 );
// Description:
// Make this window the current OpenGL context.
void MakeCurrent() = 0;
// Description:
// Register a texture name with this render window.
void RegisterTextureResource (GLuint id);
// Description:
// Get the size of the depth buffer.
int GetDepthBufferSize();
// Description:
// Get the size of the color buffer.
// Returns 0 if not able to determine otherwise sets R G B and A into buffer.
int GetColorBufferSizes(int *rgba);
// Description:
// Initialize OpenGL for this window.
virtual void OpenGLInit();
// Description:
// Return the OpenGL name of the back left buffer.
// It is GL_BACK_LEFT if GL is bound to the window-system-provided
// framebuffer. It is vtkgl::COLOR_ATTACHMENT0_EXT+i if GL is bound to an
// application-created framebuffer object (GPU-based offscreen rendering)
// It is used by vtkOpenGLCamera.
unsigned int GetBackLeftBuffer();
// Description:
// Return the OpenGL name of the back right buffer.
// It is GL_BACK_RIGHT if GL is bound to the window-system-provided
// framebuffer. It is vtkgl::COLOR_ATTACHMENT0_EXT+i if GL is bound to an
// application-created framebuffer object (GPU-based offscreen rendering)
// It is used by vtkOpenGLCamera.
unsigned int GetBackRightBuffer();
// Description:
// Return the OpenGL name of the front left buffer.
// It is GL_FRONT_LEFT if GL is bound to the window-system-provided
// framebuffer. It is vtkgl::COLOR_ATTACHMENT0_EXT+i if GL is bound to an
// application-created framebuffer object (GPU-based offscreen rendering)
// It is used by vtkOpenGLCamera.
unsigned int GetFrontLeftBuffer();
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);
// Description:
// Create an offScreen window based on OpenGL framebuffer extension.
// Return if the creation was successful or not.
// \pre positive_width: width>0
// \pre positive_height: height>0
// \pre not_initialized: !OffScreenUseFrameBuffer
// \post valid_result: (result==0 || result==1)
// && (result implies OffScreenUseFrameBuffer)
int CreateHardwareOffScreenWindow(int width, int height);
// Description:
// Destroy an offscreen window based on OpenGL framebuffer extension.
// \pre initialized: OffScreenUseFrameBuffer
// \post destroyed: !OffScreenUseFrameBuffer
void DestroyHardwareOffScreenWindow();
// Description:
// Flag telling if a framebuffer-based offscreen is currently in use.
int OffScreenUseFrameBuffer;
// Description:
// Variables used by the framebuffer-based offscreen method.
int NumberOfFrameBuffers;
unsigned int TextureObjects[4]; // really GLuint
unsigned int FrameBufferObject; // really GLuint
unsigned int DepthRenderBufferObject; // really GLuint
// Description:
// Create a not-off-screen window.
virtual void CreateAWindow()=0;
// Description:
// Destroy a not-off-screen window.
virtual void DestroyWindow()=0;
unsigned int BackLeftBuffer;
unsigned int BackRightBuffer;
unsigned int FrontLeftBuffer;
private:
vtkOpenGLRenderWindow(const vtkOpenGLRenderWindow&); // Not implemented.
void operator=(const vtkOpenGLRenderWindow&); // Not implemented.
};
#endif
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