vtkTextureUnitManager.h

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

  Program:   Visualization Toolkit
  Module:    vtkTextureUnitManager.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 vtkTextureUnitManager_h
#define vtkTextureUnitManager_h

#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkObject.h"

class vtkOpenGLRenderWindow;

class VTKRENDERINGOPENGL2_EXPORT vtkTextureUnitManager : public vtkObject
{
public:
  vtkTypeMacro(vtkTextureUnitManager,vtkObject);

  void PrintSelf(ostream& os, vtkIndent indent) override;

  static vtkTextureUnitManager *New();


  void SetContext(vtkOpenGLRenderWindow *context);
  vtkGetObjectMacro(Context,vtkOpenGLRenderWindow);

  int GetNumberOfTextureUnits();

  virtual int Allocate();

  virtual int Allocate(int unit);

  bool IsAllocated(int textureUnitId);

  virtual void Free(int textureUnitId);

protected:
  vtkTextureUnitManager();

  ~vtkTextureUnitManager() override;

  void DeleteTable();

  vtkOpenGLRenderWindow *Context;

  int NumberOfTextureUnits;
  bool *TextureUnits;

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

#endif