SoAsciiText.h

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/*
 *
 *  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/
 *
 */
 
/**************************************************************************
 *               Copyright (C) 1991-94, Silicon Graphics, Inc.            *
 *  These coded instructions, statements, and computer programs  contain  *
 *  unpublished  proprietary  information of Silicon Graphics, Inc., and  *
 *  are protected by Federal copyright law.  They  may  not be disclosed  *
 *  to  third  parties  or copied or duplicated in any form, in whole or  *
 *  in part, without the prior written consent of 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 SoAsciiText node class.
 |
 |   Author(s)          : Chris Marrin,  Gavin Bell
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */
 
#ifndef  _SO_ASCIITEXT_
#define  _SO_ASCIITEXT_
 
#include <Inventor/SbBox.h>
#include <Inventor/fields/SoMFString.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBitMask.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/nodes/SoShape.h>
 
#include <Inventor/system/SbOpenGL.h>   // For GLenum declaration
 
#ifndef gluTESSELATOR
#if defined(__glu_h__) && (GLU_VERSION_1_2)
#define gluTESSELATOR  GLUtesselator
#else
#define gluTESSELATOR  GLUtriangulatorObj
extern "C" struct GLUtriangulatorObj;
#endif
#endif
 
 
 
class MyOutlineFontCache;
class SoPrimitiveVertex;
class SoTextureCoordinateElement;
 
 
 
class INVENTOR_API SoAsciiText : public SoShape {
 
    SO_NODE_HEADER(SoAsciiText);
 
  public:
    enum Justification {
        LEFT    = 0x01,
        RIGHT   = 0x02,
        CENTER  = 0x03
    };
 
 
 
    SoMFString          string;         
 
    SoSFFloat           spacing;        
 
    SoSFEnum            justification;
 
    SoMFFloat           width;          
 
 
    SoAsciiText();
 
  SoEXTENDER public:
 
    virtual void        GLRender(SoGLRenderAction *action);
    virtual void        rayPick(SoRayPickAction *action);
 
  SoINTERNAL public:
    static void         initClass();
 
  protected:
    virtual void        computeBBox(SoAction *action, SbBox3f &box,
                                    SbVec3f &center);
 
    virtual void        generatePrimitives(SoAction *);
    
    virtual ~SoAsciiText();
 
  private:
    bool setupFontCache(SoState *state, bool forRender = FALSE);
 
    void getFrontBBox(SbBox2f &result);
 
 
    SbVec2f getStringOffset(int line, float width);
    
    void renderFront(SoGLRenderAction *action, const SbString &string,
                     float width, GLUtriangulatorObj *tobj);
    
    SoDetail * createTriangleDetail(SoRayPickAction *,
                                    const SoPrimitiveVertex *,
                                    const SoPrimitiveVertex *,
                                    const SoPrimitiveVertex *,
                                    SoPickedPoint *);
 
    void generateFront(const SbString &string, float width);
    
    static void CALLBACK beginCB(GLenum primType);
    static void CALLBACK endCB();
    static void CALLBACK vtxCB(void *vertex);
    
    MyOutlineFontCache *myFont;
 
    static SoAsciiText *currentGeneratingNode;
    static SoPrimitiveVertex *genPrimVerts[3];
    static SbVec3f genTranslate;
    static int genWhichVertex;
    static uint32_t genPrimType;
    static SoAction *genAction;
    static bool genBack;
    static bool genTexCoord;
    static const SoTextureCoordinateElement *tce;
};
 
#endif /* _SO_ASCIITEXT_ */