vtkOpenGLTexture.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkOpenGLTexture_h
#define vtkOpenGLTexture_h
 
#include "vtkRenderingOpenGL2Module.h" // For export macro
#include "vtkTexture.h"
#include "vtkWeakPointer.h"   // needed for vtkWeakPointer.
#include "vtkWrappingHints.h" // For VTK_MARSHALAUTO
 
VTK_ABI_NAMESPACE_BEGIN
class vtkRenderWindow;
class vtkTextureObject;
 
class VTKRENDERINGOPENGL2_EXPORT VTK_MARSHALAUTO 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);
 
  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_INTERNAL)
  vtkGetObjectMacro(TextureObject, vtkTextureObject);
  VTK_MARSHALEXCLUDE(VTK_MARSHAL_EXCLUDE_REASON_IS_INTERNAL)
  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 maxDimGL);
 
private:
  vtkOpenGLTexture(const vtkOpenGLTexture&) = delete;
  void operator=(const vtkOpenGLTexture&) = delete;
};
 
VTK_ABI_NAMESPACE_END
#endif