gldlist.cpp

来自「ncbi源码」· C++ 代码 · 共 157 行

/*
 * ===========================================================================
 * PRODUCTION $Log: gldlist.cpp,v $
 * PRODUCTION Revision 1000.2  2004/06/01 20:50:44  gouriano
 * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.9
 * PRODUCTION
 * ===========================================================================
 */

/*  $Id: gldlist.cpp,v 1000.2 2004/06/01 20:50:44 gouriano Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Authors:  Mike DiCuccio
 *
 * File Description:
 *    CGlDisplayList        - manager for a single display list
 *    CGlDisplayListCompile - utility class to permit scoped creation of
 *                            display lists.
 */

#include <ncbi_pch.hpp>
#include <gui/opengl/gldlist.hpp>


BEGIN_NCBI_SCOPE


CGlDisplayList::CGlDisplayList()
    : m_DList(0), m_IsValid(false)
{
}


CGlDisplayList::~CGlDisplayList()
{
    Delete();    
}

void CGlDisplayList::x_Init()
{
    if (glIsList(m_DList)) {
        glDeleteLists(m_DList, 1);
    }
    m_DList = glGenLists(1);
}


void CGlDisplayList::Begin(GLenum mode)
{
    if (!glIsList(m_DList)) {
        x_Init();
    }

    glNewList(m_DList, mode);
    m_IsValid = true;
}


void CGlDisplayList::End()
{
    glEndList();
}


void CGlDisplayList::Call() const
{
    glCallList(m_DList);
}

void CGlDisplayList::Delete()
{
    // this may fail if we don't have a valid OpenGL context made current, but
    // we have to risk it.
    if (glIsList(m_DList)) {
        glDeleteLists(m_DList, 1);
        m_DList = 0;
    }
    m_IsValid = false;
}

CGlDisplayListCompile::CGlDisplayListCompile(CGlDisplayList& dlist,
                                             GLenum mode)
    : m_DList(dlist)
{
    m_DList.Begin(mode);
}


CGlDisplayListCompile::~CGlDisplayListCompile()
{
    m_DList.End();
}


END_NCBI_SCOPE


/*
 * ===========================================================================
 * $Log: gldlist.cpp,v $
 * Revision 1000.2  2004/06/01 20:50:44  gouriano
 * PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.9
 *
 * Revision 1.9  2004/05/21 22:27:45  gorelenk
 * Added PCH ncbi_pch.hpp
 *
 * Revision 1.8  2004/03/11 17:38:00  dicuccio
 * Invalid display list is 0, not -1
 *
 * Revision 1.7  2004/02/17 15:15:39  yazhuk
 * Added Delete()
 *
 * Revision 1.6  2003/09/29 15:02:13  johnson
 * isValid set to false upon construction
 *
 * Revision 1.5  2003/08/19 16:34:46  johnson
 * isvalid set to true *whenever* Begin is called
 *
 * Revision 1.4  2003/06/09 19:24:51  dicuccio
 * Changed ctor to take GLenum instead of internal typedef
 *
 * Revision 1.3  2003/01/13 13:10:11  dicuccio
 * Namespace clean-up.  Retired namespace gui -> converted all to namespace ncbi.
 * Moved all FLUID-generated code into namespace ncbi.
 *
 * Revision 1.2  2002/12/06 13:59:45  dicuccio
 * Made Call() a const function.
 *
 * Revision 1.1  2002/11/22 18:06:28  dicuccio
 * Initial revision.
 *
 * ===========================================================================
 */