Source

Coin / src / elements / GL / SoGLLightIdElement.cpp

Lars J. Aas 144145b 
Marius Kintel 3ba6b41 




























Lars J. Aas 144145b 









Morten Eriksen 5c9dde5 



Tom Fredrik Blen… c56c6a7 
Lars J. Aas 144145b 

Lars J. Aas 92263e4 
Lars J. Aas 144145b 

Morten Eriksen 5c9dde5 
Morten Eriksen 064c695 
Lars J. Aas 144145b 

Lars J. Aas 92263e4 
Tom Fredrik Blen… 4fdbd58 
Lars J. Aas 92263e4 
Morten Eriksen 5c9dde5 

Lars J. Aas 144145b 

Morten Eriksen 5c9dde5 

Lars J. Aas 144145b 






























































Tom Fredrik Blen… c56c6a7 
Lars J. Aas 144145b 
Peder Blekken 4f09644 
Lars J. Aas 144145b 
Peder Blekken 4f09644 


Lars J. Aas 144145b 

Morten Eriksen 064c695 









Tom Fredrik Blen… c56c6a7 
Morten Eriksen 064c695 





Morten Eriksen 5c9dde5 
Morten Eriksen 064c695 
Lars J. Aas 144145b 



Tom Fredrik Blen… c56c6a7 
Lars J. Aas 144145b 







Morten Eriksen 064c695 
Lars J. Aas 144145b 



Morten Eriksen 5c9dde5 






Morten Eriksen 064c695 
Morten Eriksen 5c9dde5 

Tom Fredrik Blen… c56c6a7 

Peder Blekken a55449a 
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
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
\**************************************************************************/

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

  FIXME: write doc.
*/

// *************************************************************************

#include <Inventor/elements/SoGLLightIdElement.h>

#include <cassert>

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif // HAVE_CONFIG_H

#include <Inventor/C/glue/gl.h>
#include <Inventor/errors/SoDebugError.h>
#include <Inventor/system/gl.h>

#include "glue/glp.h"
#include "rendering/SoGL.h"

// *************************************************************************

SO_ELEMENT_SOURCE(SoGLLightIdElement);

// *************************************************************************

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

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

/*!
  The destructor.
*/

SoGLLightIdElement::~SoGLLightIdElement(void)
{
}

//! FIXME: write doc.

void
SoGLLightIdElement::init(SoState * state)
{
  inherited::init(state);
  this->data = getDefault();
}

//! FIXME: write doc.

void
SoGLLightIdElement::push(SoState * state)
{
  inherited::push(state);
  this->data = ((SoGLLightIdElement*)this->getNextInStack())->data;
}

//! FIXME: write doc.

void
SoGLLightIdElement::pop(SoState * state,
                        const SoElement * prevTopElement)
{
  // capture element since we change the GL state here
  this->capture(state);

  int idx = this->data + 1;
  int prevdata = ((SoGLLightIdElement*)prevTopElement)->data;
  // disable used light sources
  while (idx <= prevdata) {
    glDisable((GLenum)((int32_t)GL_LIGHT0 + idx));
    idx++;
  }
}

//! FIXME: write doc.

int32_t
SoGLLightIdElement::increment(SoState * const state,
                              SoNode * const /* node */)
{
  SoGLLightIdElement * element = (SoGLLightIdElement *)
    getElement(state, getClassStackIndex());

  if (element) {
    const cc_glglue * glue = sogl_glue_instance(state);
    element->data++;
    int maxl = cc_glglue_get_max_lights(glue);

    if (element->data >= maxl) {
      element->data--;
#if COIN_DEBUG
      static SbBool warn = TRUE;

      if (warn) { // warn only once
        warn = FALSE;
        SoDebugError::postWarning("SoGLLightIdElement::increment",
                                  "Number of concurrent light sources in "
                                  "scene exceeds %d, which is the maximum "
                                  "number of concurrent light sources "
                                  "supported by this OpenGL implementation. "
                                  "Some light sources will be ignored.\n\n"

                                  "(Note to application "
                                  "programmers: this error is often caused by "
                                  "a missing SoState::pop() call in extension "
                                  "shape nodes -- audit your GLRender() "
                                  "method(s)).",

                                  maxl);
      }
#endif
      return -1;
    }
    glEnable((GLenum)((int32_t)GL_LIGHT0 + element->data));

    return element->data;
  }
  return -1;
}

//! FIXME: write doc.

int32_t
SoGLLightIdElement::getMaxGLSources(void)
{
  // FIXME: should also make a likewise method available as part of
  // the So*GLWidget classes. 20020802 mortene.

  SoDebugError::postWarning("SoGLLightIdElement::getMaxGLSources",
                            "This function is obsoleted. It should not "
                            "be used because its interface is fubar: "
                            "the number of light sources available from "
                            "the OpenGL driver depends on the context, and "
                            "this function does not know which context this "
                            "information is requested for.");

  GLint val;
  glGetIntegerv(GL_MAX_LIGHTS, &val);

  GLenum err = sogl_glerror_debugging() ? glGetError() : GL_NO_ERROR;
  assert(err == GL_NO_ERROR &&
         "GL error when calling glGetInteger() -- no current GL context?");

  return (int32_t)val;
}

//! FIXME: write doc.

int32_t
SoGLLightIdElement::increment(SoState * const state)
{
  return increment(state, NULL);
}

//! FIXME: write doc.

int32_t
SoGLLightIdElement::get(SoState * const state)
{
  return SoInt32Element::get(classStackIndex, state);
}

//! FIXME: write doc.

int32_t
SoGLLightIdElement::getDefault()
{
  return -1;
}