text: /*=========================================================================
  
    Program:   Visualization Toolkit
    Module:    vtkOpenGLProperty.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.
  
  =========================================================================*/
  /**
   * @class   vtkOpenGLProperty
   * @brief   OpenGL property
   *
   * vtkOpenGLProperty is a concrete implementation of the abstract class
   * vtkProperty. vtkOpenGLProperty interfaces to the OpenGL rendering library.
  */
  
  #ifndef vtkOpenGLProperty_h
  #define vtkOpenGLProperty_h
  
  #include "vtkRenderingOpenGL2Module.h" // For export macro
  #include "vtkProperty.h"
  
  class VTKRENDERINGOPENGL2_EXPORT vtkOpenGLProperty : public vtkProperty
  {
  public:
    static vtkOpenGLProperty *New();
    vtkTypeMacro(vtkOpenGLProperty, vtkProperty);
    void PrintSelf(ostream& os, vtkIndent indent) VTK_OVERRIDE;
  
    /**
     * Implement base class method.
     */
    void Render(vtkActor *a, vtkRenderer *ren);
  
    /**
     * Implement base class method.
     */
    void BackfaceRender(vtkActor *a, vtkRenderer *ren);
  
    /**
     * This method is called after the actor has been rendered.
     * Don't call this directly. This method cleans up
     * any shaders allocated.
     */
    virtual void PostRender(vtkActor *a,
                            vtkRenderer *r);
  
    /**
     * Release any graphics resources that are being consumed by this
     * property. The parameter window could be used to determine which graphic
     * resources to release.
     */
    virtual void ReleaseGraphicsResources(vtkWindow *win);
  
  protected:
    vtkOpenGLProperty();
    ~vtkOpenGLProperty();
  
    /**
     * Method called in vtkOpenGLProperty::Render() to render textures.
     * Last argument is the value returned from RenderShaders() call.
     */
    bool RenderTextures(vtkActor* actor, vtkRenderer* renderer);
  
  private:
    vtkOpenGLProperty(const vtkOpenGLProperty&) VTK_DELETE_FUNCTION;
    void operator=(const vtkOpenGLProperty&) VTK_DELETE_FUNCTION;
  };
  
  #endif
  