vtkOpenGLTexture.h

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

  Program:   Visualization Toolkit
  Module:    vtkOpenGLTexture.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 vtkOpenGLTexture_h
#define vtkOpenGLTexture_h

#include "vtkRenderingOpenGLModule.h" // For export macro
#include "vtkTexture.h"

#include "vtkWeakPointer.h" // needed for vtkWeakPointer.

class vtkWindow;
class vtkOpenGLRenderer;
class vtkRenderWindow;
class vtkPixelBufferObject;

class VTKRENDERINGOPENGL_EXPORT vtkOpenGLTexture : public vtkTexture
{
public:
  static vtkOpenGLTexture *New();
  vtkTypeMacro(vtkOpenGLTexture, vtkTexture);
  void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;

  void Load(vtkRenderer*);

  // Descsription:
  // Clean up after the rendering is complete.
  virtual void PostRender(vtkRenderer*);

  void ReleaseGraphicsResources(vtkWindow*);


  vtkGetMacro(Index, long);

protected:

  vtkOpenGLTexture();
  ~vtkOpenGLTexture();

  unsigned char *ResampleToPowerOfTwo(int &xsize, int &ysize,
                                      unsigned char *dptr, int bpp);

  vtkTimeStamp   LoadTime;
  unsigned int Index; // actually GLuint
  vtkWeakPointer<vtkRenderWindow> RenderWindow;   // RenderWindow used for previous render
  bool CheckedHardwareSupport;
  bool SupportsNonPowerOfTwoTextures;
  bool SupportsPBO;
  vtkPixelBufferObject *PBO;

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

  virtual void Initialize(vtkRenderer * ren);

};

#endif