OSGViewport.cpp

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/*---------------------------------------------------------------------------*\
 *                                OpenSG                                     *
 *                                                                           *
 *                                                                           *
 *             Copyright(C) 2000-2002 by the OpenSG Forum                   *
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 *                            www.opensg.org                                 *
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 *   contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de          *
 *                                                                           *
\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
 *                                License                                    *
 *                                                                           *
 * This library is free software; you can redistribute it and/or modify it   *
 * under the terms of the GNU Library General Public License as published    *
 * by the Free Software Foundation, version 2.                               *
 *                                                                           *
 * 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         *
 * Library General Public License for more details.                          *
 *                                                                           *
 * You should have received a copy of the GNU Library General Public         *
 * License along with this library; if not, write to the Free Software       *
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 *
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\*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*\
 *                                Changes                                    *
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\*---------------------------------------------------------------------------*/

//---------------------------------------------------------------------------
//  Includes
//---------------------------------------------------------------------------

#include <stdlib.h>
#include <stdio.h>

#include "OSGConfig.h"

#include <OSGGL.h>

#include <OSGField.h>
#include <OSGFieldContainer.h>
#include <OSGAction.h>
#include <OSGDrawAction.h>
#include <OSGRenderAction.h>
#include "OSGBackground.h"
#include "OSGViewport.h"
#include "OSGWindow.h"
#include "OSGCamera.h"
#include "OSGForeground.h"

OSG_USING_NAMESPACE


/***************************************************************************\
 *                            Description                                  *
\***************************************************************************/

/***************************************************************************\
 *                           Class methods                                 *
\***************************************************************************/

/*-------------------------------------------------------------------------*\
 -  public                                                                 -
\*-------------------------------------------------------------------------*/

void Viewport::initMethod(void)
{
}

/***************************************************************************\
 *                           Instance methods                              *
\***************************************************************************/

/*------------- constructors & destructors --------------------------------*/

Viewport::Viewport(void) :
    Inherited()
{
}

Viewport::Viewport(const Viewport &source) :
    Inherited(source)
{
}

Viewport::~Viewport(void)
{
}

void Viewport::changed(BitVector whichField, UInt32 origin)
{
    Inherited::changed(whichField, origin);
}

/*---------------------------- properties ---------------------------------*/

Int32 Viewport::getPixelLeft(void) const
{
    if(getLeft() > 1)
        return Int32(getLeft());

    if(getParent() == NullFC)
    {
        SWARNING << "Viewport::getPixelLeft: viewport has no parent window!" << std::endl;
        return 0;
    }

    return Int32(getParent()->getWidth() * getLeft());
}

Int32 Viewport::getPixelRight(void) const
{
    // >1: pixel
    if(getRight() > 1)
        return Int32(getRight());

    if(getParent() == NullFC)
    {
        SWARNING << "Viewport::getPixelRight: viewport has no parent window!" << std::endl;
        return 0;
    }

    // <=1: partial screen, use 1 less to not overlap other windows
    return Int32(getParent()->getWidth() * getRight() - 1);
}

Int32 Viewport::getPixelBottom(void) const
{
    if(getBottom() > 1)
        return Int32(getBottom());

    if(getParent() == NullFC)
    {
        SWARNING << "Viewport::getPixelBottom: viewport has no parent window!" << std::endl;
        return 0;
    }

    return Int32(getParent()->getHeight() * getBottom());
}

Int32 Viewport::getPixelTop(void) const
{
    // >1: pixel
    if(getTop() > 1)
        return Int32(getTop());

    if(getParent() == NullFC)
    {
        SWARNING << "Viewport::getPixelTop: viewport has no parent window!" << std::endl;
        return 0;
    }

    // <=1: partial screen, use 1 less to not overlap other windows
    return Int32(getParent()->getHeight() * getTop() - 1);
}

bool Viewport::isFullWindow(void) const
{
    if(getParent() == NullFC)
    {
        SWARNING << "Viewport::isFullWindow: viewport has no parent window!" << std::endl;
        return false;
    }

    return  getPixelBottom() == 0 &&
            getPixelLeft()   == 0 &&
            getPixelTop()    == getParent()->getHeight() - 1 &&
            getPixelRight()  == getParent()->getWidth() - 1;
}

void Viewport::clearForegrounds(void)
{
    for(UInt32 i = 0; i < _mfForegrounds.size(); ++i)
    {
        subRefCP(_mfForegrounds[i]);
    }

    _mfForegrounds.clear();

}

void Viewport::addForeground(ForegroundPtr pForeground)
{
    addRefCP(pForeground);
    
    _mfForegrounds.push_back(pForeground);
}



/*-------------------------- your_category---------------------------------*/

void Viewport::activateSize(void)
{
    GLint pl=getPixelLeft();
    GLint pr=getPixelRight();
    GLint pb=getPixelBottom();
    GLint pt=getPixelTop();
    GLint pw=pr-pl+1;
    GLint ph=pt-pb+1;

    glViewport(pl, pb, pw, ph);

    if(!isFullWindow())
    {
        glScissor(pl, pb, pw, ph);
        glEnable(GL_SCISSOR_TEST);
    }
    else
        glDisable(GL_SCISSOR_TEST);
        
}

void Viewport::activate(void)
{
    activateSize();
}

void Viewport::deactivate(void)
{
}


void Viewport::draw(DrawAction * action)
{
    if(getCamera() == NullFC)
    {
        SWARNING << "Viewport::draw: no camera!" << std::endl;
        return;
    }
    if(getBackground() == NullFC)
    {
        SWARNING << "Viewport::draw: no Background!" << std::endl;
        return;
    }
    if(getRoot() == NullFC)
    {
        SWARNING << "Viewport::draw: no root!" << std::endl;
        return;
    }

    activate();

    action->setViewport  (this);
    action->setCamera    (getCamera    ().getCPtr());
    action->setBackground(getBackground().getCPtr());
    action->setTravMask  (getTravMask()            );
    
    getCamera    ()->setup(action, *this);
    getBackground()->clear(action,  this);

    action->apply(getRoot());

    for(UInt16 i=0; i < getForegrounds().size(); i++)
        getForegrounds(i)->draw(action, this);

    deactivate();
}


void Viewport::render(RenderActionBase *action)
{
    if(getCamera() == NullFC)
    {
        SWARNING << "Viewport::render: no camera!" << std::endl;
        return;
    }
    if(getBackground() == NullFC)
    {
        SWARNING << "Viewport::render: no Background!" << std::endl;
        return;
    }
    if(getRoot() == NullFC)
    {
        SWARNING << "Viewport::render: no root!" << std::endl;
        return;
    }

    activate();

    action->setCamera    (getCamera    ().getCPtr());
    action->setBackground(getBackground().getCPtr());
    action->setViewport  (this                     );
    action->setTravMask  (getTravMask()            );

//  getCamera()->setup(action, *this);
//  getBackground()->clear(action, this);

/*
fprintf(stderr,"%p: node 0x%p startrender\n", Thread::getCurrent(), 
                getRoot().getCPtr());
*/
    action->apply(getRoot());

    for(UInt16 i=0; i < getForegrounds().size(); i++)
        getForegrounds(i)->draw(action, this);

    deactivate();
}

/*------------------------------- dump ----------------------------------*/

void Viewport::dump(     UInt32    OSG_CHECK_ARG(uiIndent), 
                    const BitVector OSG_CHECK_ARG(bvFlags)) const
{
    SLOG << "Dump Viewport NI" << std::endl;
}




/*------------------------------------------------------------------------*/
/*                              cvs id's                                  */

#ifdef OSG_SGI_CC
#pragma set woff 1174
#endif

#ifdef OSG_LINUX_ICC
#pragma warning( disable : 177 )
#endif

namespace
{
    static Char8 cvsid_cpp       [] = "@(#)$Id: FCTemplate_cpp.h,v 1.13 2002/06/01 10:37:25 vossg Exp $";
    static Char8 cvsid_hpp       [] = OSGVIEWPORT_HEADER_CVSID;
    static Char8 cvsid_inl       [] = OSGVIEWPORT_INLINE_CVSID;

    static Char8 cvsid_fields_hpp[] = OSGVIEWPORTFIELDS_HEADER_CVSID;
}

#ifdef __sgi
#pragma reset woff 1174
#endif

---