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 "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkTexture.h"
#include "vtkWeakPointer.h" // needed for vtkWeakPointer.
 
class vtkRenderWindow;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLTexture : public vtkTexture
{
public:
  static vtkOpenGLTexture* New();
  vtkTypeMacro(vtkOpenGLTexture, vtkTexture);
  void PrintSelf(ostream& os, vtkIndent indent) override;
 
  void Render(vtkRenderer* ren) override;
 
  void Load(vtkRenderer*) override;
 
  // Descsription:
  // Clean up after the rendering is complete.
  void PostRender(vtkRenderer*) override;
 
  void ReleaseGraphicsResources(vtkWindow*) override;
 
  void CopyTexImage(int x, int y, int width, int height);
 
 
  vtkGetMacro(IsDepthTexture, int);
  vtkSetMacro(IsDepthTexture, int);
 
 
  vtkGetMacro(TextureType, int);
  vtkSetMacro(TextureType, int);
 
  vtkGetObjectMacro(TextureObject, vtkTextureObject);
  void SetTextureObject(vtkTextureObject*);
 
  int GetTextureUnit() override;
 
  int IsTranslucent() override;
 
protected:
  vtkOpenGLTexture();
  ~vtkOpenGLTexture() override;
 
  vtkTimeStamp LoadTime;
  vtkWeakPointer<vtkRenderWindow> RenderWindow; // RenderWindow used for previous render
 
  bool ExternalTextureObject;
  vtkTextureObject* TextureObject;
 
  int IsDepthTexture;
  int TextureType;
  int PrevBlendParams[4];
 
  // used when the texture exceeds the GL limit
  unsigned char* ResampleToPowerOfTwo(
    int& xsize, int& ysize, unsigned char* dptr, int bpp, int maxTexSize);
 
private:
  vtkOpenGLTexture(const vtkOpenGLTexture&) = delete;
  void operator=(const vtkOpenGLTexture&) = delete;
};
 
#endif