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Coin / src / shaders / SoGLARBShaderProgram.cpp

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/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
 * All rights reserved.
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 * 
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 * this list of conditions and the following disclaimer.
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 * this software without specific prior written permission.
 * 
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#include "SoGLARBShaderProgram.h"

#include <string.h>
#include <assert.h>

#include <Inventor/errors/SoDebugError.h>
#include "SoGLARBShaderObject.h"

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

// FIXME: no checking is done to see whether "ARB shading" is actually
// supported or not. 20050124 mortene.

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

SoGLARBShaderProgram::SoGLARBShaderProgram(void)
{
  this->fragmentShader = NULL;
  this->vertexShader = NULL;
}

void
SoGLARBShaderProgram::addShaderObject(SoGLARBShaderObject * shaderObject)
{
  if (shaderObject->getShaderType() == SoGLShaderObject::VERTEX) {
    this->vertexShader = shaderObject;
  }
  else {
    assert(shaderObject->getShaderType() == SoGLShaderObject::FRAGMENT);
    this->fragmentShader = shaderObject;
  }
}

void
SoGLARBShaderProgram::removeShaderObjects(void)
{
  this->vertexShader = NULL;
  this->fragmentShader = NULL;
}

void
SoGLARBShaderProgram::enable(void)
{
  if (this->fragmentShader) this->fragmentShader->enable();
  if (this->vertexShader) this->vertexShader->enable();
}

void
SoGLARBShaderProgram::disable(void)
{
  if (this->fragmentShader) this->fragmentShader->disable();
  if (this->vertexShader) this->vertexShader->disable();
}

#if defined(SOURCE_HINT)
SbString
SoGLARBShaderProgram::getSourceHint(void) const
{
  SbString result;

  if (this->fragmentShader && this->fragmentShader->isActive()) {
    SbString str = this->fragmentShader->sourceHint;
    if (str.getLength() > 0) str += " ";
    result += str;
  }
  if (this->vertexShader && this->vertexShader->isActive()) {
    SbString str = this->vertexShader->sourceHint;
    if (str.getLength() > 0) str += " ";
    result += str;
  }
  return result;
}
#endif