text: /*
   *
   *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
   *
   *  This library is free software; you can redistribute it and/or
   *  modify it under the terms of the GNU Lesser General Public
   *  License as published by the Free Software Foundation; either
   *  version 2.1 of the License, or (at your option) any later version.
   *
   *  This library is distributed in the hope that it will be useful,
   *  but WITHOUT ANY WARRANTY; without even the implied warranty of
   *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   *  Lesser General Public License for more details.
   *
   *  Further, this software is distributed without any warranty that it is
   *  free of the rightful claim of any third person regarding infringement
   *  or the like.  Any license provided herein, whether implied or
   *  otherwise, applies only to this software file.  Patent licenses, if
   *  any, provided herein do not apply to combinations of this program with
   *  other software, or any other product whatsoever.
   * 
   *  You should have received a copy of the GNU Lesser General Public
   *  License along with this library; if not, write to the Free Software
   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
   *  Mountain View, CA  94043, or:
   * 
   *  http://www.sgi.com 
   * 
   *  For further information regarding this notice, see: 
   * 
   *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
   *
   */
  
  //  -*- C++ -*-
  
  /*
   * Copyright (C) 1990,91   Silicon Graphics, Inc.
   *
   _______________________________________________________________________
   ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
   |
   |   $Revision: 1.1.1.1 $
   |
   |   Description:
   |	This file defines the SoGLLinePatternElement class.
   |
   |   Author(s)		: Paul S. Strauss
   |
   ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
   _______________________________________________________________________
   */
  
  #ifndef  _SO_GL_LINE_PATTERN_ELEMENT
  #define  _SO_GL_LINE_PATTERN_ELEMENT
  
  #include <Inventor/elements/SoLinePatternElement.h>
  
  //////////////////////////////////////////////////////////////////////////////
  //
  //  Class: SoGLLinePatternElement
  //
  //  Element that stores the current line pattern in GL. Overrides the
  //  virtual methods on SoLinePatternElement to send the line pattern
  //  to GL when necessary.
  //
  //  Note that this class relies on SoLinePatternElement to store the
  //  pattern in the instance.
  //
  //////////////////////////////////////////////////////////////////////////////
  
  SoEXTENDER class INVENTOR_API SoGLLinePatternElement : public SoLinePatternElement {
  
      SO_ELEMENT_HEADER(SoGLLinePatternElement);
  
    public:
      // Initializes element
      virtual void	init(SoState *state);
  
      // Override push() so we can remember what line pattern the
      // previous element set, and not send it again if it is the same.
      virtual void	push(SoState *state);
  
      // Override pop() method so side effects can occur in GL
      virtual void	pop(SoState *state, const SoElement *prevTopElement);
  
    SoINTERNAL public:
      // Initializes the SoGLLinePatternElement class
      static void		initClass();
  
    protected:
      // Sets the line pattern in an instance. Has GL side effects.
      virtual void	setElt(int32_t pattern);
  
      virtual ~SoGLLinePatternElement();
  
    private:
      // We save the state to figure out if the lastPattern variable was
      // copied from a parent element; if it was, then caches will have
      // to depend on that element because if it changes we have to have
      // a chance to change our decision about what GL calls to make.
      // If this is NULL, then there are no cache dependencies.
      SoState *		copiedFromParent;
  
      // Sends line pattern in element to GL
      void		send();
  };
  
  #endif /* _SO_GL_LINE_PATTERN_ELEMENT */
  