vtkRenderbuffer.h

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

  Program:   Visualization Toolkit
  Module:    vtkRenderbuffer.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 vtkRenderbuffer_h
#define vtkRenderbuffer_h

#include "vtkObject.h"
#include "vtkRenderingOpenGL2Module.h" // for export macro
#include "vtkWeakPointer.h" // for render context

class vtkRenderWindow;
class vtkWindow;

class VTKRENDERINGOPENGL2_EXPORT vtkRenderbuffer : public vtkObject
{
public:
  static vtkRenderbuffer* New();
  vtkTypeMacro(vtkRenderbuffer, vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  static bool IsSupported(vtkRenderWindow *renWin);


  vtkGetMacro(Handle, unsigned int);


  void SetContext(vtkRenderWindow *win);
  vtkRenderWindow* GetContext();

  int CreateColorAttachment(
        unsigned int width,
        unsigned int height);

  int CreateDepthAttachment(
        unsigned int width,
        unsigned int height);

  int Create(
        unsigned int format,
        unsigned int width,
        unsigned int height);
  int Create(
        unsigned int format,
        unsigned int width,
        unsigned int height,
        unsigned int samples);

  void ReleaseGraphicsResources(vtkWindow *win);

  // resizes an existing renderbuffer
  void Resize(unsigned int width, unsigned int height);


  vtkGetMacro(Width, unsigned int);
  vtkGetMacro(Height, unsigned int);
  vtkGetMacro(Samples, unsigned int);

protected:
  vtkRenderbuffer();
  ~vtkRenderbuffer() override;

  bool LoadRequiredExtensions(vtkRenderWindow *renWin);
  void Alloc();
  void Free();

  int DepthBufferFloat;

  unsigned int Width;
  unsigned int Height;
  unsigned int Format;
  unsigned int Samples;

private:
  unsigned int Handle;
  vtkWeakPointer<vtkRenderWindow> Context;

private:
  vtkRenderbuffer(const vtkRenderbuffer&) = delete;
  void operator=(const vtkRenderbuffer&) = delete;
};

#endif