MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/elements/SoGLCacheContextElement.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) 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 SoGLCacheContextElement class.
 |
 |   Author(s)          : Gavin Bell
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */

#ifndef  _SO_CACHE_CONTEXT_ELEMENT
#define  _SO_CACHE_CONTEXT_ELEMENT

#include <Inventor/system/SbOpenGL.h>
#include <Inventor/elements/SoSubElement.h>

#define OIV_AUTO_CACHE_DEFAULT_MAX 100000



SoEXTENDER class INVENTOR_API SoGLDisplayList {

  public:
    enum Type {
        DISPLAY_LIST,
        TEXTURE_OBJECT,
        VERTEX_BUFFER_OBJECT 
        };
    SoGLDisplayList(SoState *state, Type type, int numToAllocate=1);

    void ref();
    void unref(SoState *state = NULL);

    void open(SoState *state, int index = 0);
    void close(SoState *state);

    void call(SoState *state, int index = 0);
    void addDependency(SoState *state);

    Type getType() { return type; }
    int getNumAllocated() { return num; }
    GLuint getFirstIndex() { return startIndex; }
    int getContext() { return context; }

  private:
    ~SoGLDisplayList();

    Type type;
    GLuint startIndex;
    int num;
    int refCount;
    int context;
    
    friend class SoGLCacheContextElement;
};

class SbIntList;

SoEXTENDER class INVENTOR_API SoGLCacheContextElement : public SoElement {

    SO_ELEMENT_HEADER(SoGLCacheContextElement);

  public:
    virtual void        init(SoState *state);

    static void         set(SoState *state, int context,
                            SbBool is2PassTransparency,
                            SbBool isRemoteRendering);

    static int          get(SoState *state);


    static int          getExtID(const char *str);

    static SbBool       extSupported(SoState *state, int ext);

    static SbBool       areMipMapsFast(SoState *state);


    enum {
        DO_AUTO_CACHE = 1,   
        DONT_AUTO_CACHE = 2
    };

    static void         shouldAutoCache(SoState *state, int bits)
    {
        SoGLCacheContextElement *elt = (SoGLCacheContextElement *)
            state->getElementNoPush(classStackIndex);
        elt->autoCacheBits |= bits;
    }

    static void         setAutoCacheBits(SoState *state, int bits)
        { ((SoGLCacheContextElement *)state->getElementNoPush(
            classStackIndex))->autoCacheBits = bits;
        }

    static int          resetAutoCacheBits(SoState *state)
        {
            SoGLCacheContextElement *elt = (SoGLCacheContextElement *)
                state->getElementNoPush(classStackIndex);
            int result = elt->autoCacheBits;
            elt->autoCacheBits = elt->isRemoteRendering;
            
            return result;
        }

    static SbBool       getIsRemoteRendering(SoState *state)
        {
            const SoGLCacheContextElement *elt =
                (const SoGLCacheContextElement *)
                    state->getConstElement(classStackIndex);
            return elt->isRemoteRendering;
        }


    virtual SbBool      matches(const SoElement *elt) const;

    virtual SoElement   *copyMatchInfo() const;

    virtual void        print(FILE *fp) const;

  SoINTERNAL public:
    static void         initClass();

  protected:
    int                 context;
    SbBool              is2PassTransp;
    SbBool              isRemoteRendering;
    int                 autoCacheBits;

    virtual ~SoGLCacheContextElement();

  private:
    static void         freeList(SoState *state,
                                 SoGLDisplayList *list);

    static SbPList *    waitingToBeFreed;       
    static SbPList *    extensionList;          

friend class SoGLDisplayList;
};

#endif /* _SO_CACHE_CONTEXT_ELEMENT */