PostProcessorSobelPlugin_qt.cc

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/*===========================================================================*\
*                                                                            *
*   $Revision: 18127 $                                                       *
*   $LastChangedBy: moebius $                                                *
*   $Date: 2014-02-05 10:12:54 +0100 (Wed, 05 Feb 2014) $                     *
*                                                                            *
\*===========================================================================*/

#include "PostProcessorSobelPlugin.hh"

#if QT_VERSION >= 0x050000
 #include <QOpenGLContext>

#else
 #include <QGLFormat>
#endif


QString PostProcessorSobelPlugin::checkOpenGL() {

#if QT_VERSION < 0x050000

  QGLFormat::OpenGLVersionFlags flags = QGLFormat::openGLVersionFlags();
  if ( ! flags.testFlag(QGLFormat::OpenGL_Version_3_0) )
    return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");

  // Check extensions
  QString glExtensions = QString((const char*)glGetString(GL_EXTENSIONS));
  QString missing("");

  return missing;

#else
  QOpenGLContext* context = QOpenGLContext::currentContext();
  if ( context ) {

    // Get version and check
    QSurfaceFormat format = context->format();

    if ( (format.majorVersion() < 3) ) {
      return QString("Insufficient OpenGL Version! OpenGL 3.0 or higher required");
    }

    // Check extensions
    QString missing("");

    return missing;

  } else {
    return name() + QString(": No context available");
  }

#endif

}