1. Coin3D
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Source

Coin / src / elements / GL / SoGLViewportRegionElement.cpp

Lars J. Aas 144145b 
Marius Kintel 3ba6b41 




























Lars J. Aas 144145b 












Tom Fredrik Blen… c56c6a7 
Lars J. Aas 144145b 



































































Peder Blekken 519d4a9 
Lars J. Aas 144145b 
Peder Blekken 519d4a9 
Lars J. Aas 144145b 















Morten Eriksen 5c9dde5 
Lars J. Aas 144145b 


/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the copyright holder nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

/*!
  \class SoGLViewportRegionElement Inventor/elements/SoGLViewportRegionElement.h
  \brief The SoGLViewportRegionElement class is yet to be documented.
  \ingroup elements

  FIXME: write doc.
*/

#include <Inventor/elements/SoGLViewportRegionElement.h>


#include <cassert>
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif // HAVE_CONFIG_H

#include <Inventor/system/gl.h>

#if COIN_DEBUG
#include <Inventor/errors/SoDebugError.h>
#endif // COIN_DEBUG

SO_ELEMENT_SOURCE(SoGLViewportRegionElement);

/*!
  This static method initializes static data for the
  SoGLViewportRegionElement class.
*/

void
SoGLViewportRegionElement::initClass(void)
{
  SO_ELEMENT_INIT_CLASS(SoGLViewportRegionElement, inherited);
}

/*!
  The destructor.
*/

SoGLViewportRegionElement::~SoGLViewportRegionElement()
{
}

//! FIXME: write doc.

void
SoGLViewportRegionElement::init(SoState * state)
{
  inherited::init(state);
  this->initialized = FALSE;
}

//! FIXME: write doc.

void
SoGLViewportRegionElement::push(SoState * state)
{
  inherited::push(state);
  SoGLViewportRegionElement * prev = (SoGLViewportRegionElement*)
    this->getNextInStack();
  this->viewportRegion = prev->viewportRegion;
  this->initialized = TRUE;
}

//! FIXME: write doc.

void
SoGLViewportRegionElement::pop(SoState * state,
                               const SoElement * prevTopElement)
{
  SoGLViewportRegionElement * prev =
    (SoGLViewportRegionElement *)prevTopElement;
  if (!(this->viewportRegion == prev->viewportRegion))
    this->updategl();
  prev->capture(state);
}

//! FIXME: write doc.

void
SoGLViewportRegionElement::setElt(const SbViewportRegion & viewportRegionarg)
{
  this->viewportRegion = viewportRegionarg;
  this->initialized = TRUE;
  this->updategl();
}

//! FIXME: write doc.

void
SoGLViewportRegionElement::updategl() const
{
  if (this->initialized) {
    SbVec2s origin = this->viewportRegion.getViewportOriginPixels();
    SbVec2s size = this->viewportRegion.getViewportSizePixels();
    glViewport(origin[0], origin[1], size[0], size[1]);

#if COIN_DEBUG && 0 // debug
    SoDebugError::postInfo("SoGLViewportRegionElement::updategl",
                           "glViewport: %d %d %d %d",
                           origin[0], origin[1], size[0], size[1]);
#endif // debug
  }
}