#include <QDebug>
#include <QWindow>
#include <QGLFormat>
#include <QSurfaceFormat>
#include <QOpenGLContext>
#include <QGuiApplication>

int main(int argc, char* argv[])
{
  QGuiApplication app(argc, argv);

  QGLFormat qgl_format(QGL::SampleBuffers);
  qgl_format.setVersion(3,3);
  qgl_format.setProfile(QGLFormat::CompatibilityProfile);
  
  QWindow window;
  QOpenGLContext context;

  QSurfaceFormat surface_format = QGLFormat::toSurfaceFormat(qgl_format);
  qDebug() << "compatibility profile.: " << (surface_format.profile() == QSurfaceFormat::CompatibilityProfile);
  
  context.setFormat(surface_format);
  context.create();
  
  qDebug() << "compatibility profile.: " << (context.format().profile() == QSurfaceFormat::CompatibilityProfile);

  surface_format.setOption(QSurfaceFormat::DeprecatedFunctions);

  context.setFormat(surface_format);
  context.create();

  qDebug() << "compatibility profile.: " << (context.format().profile() == QSurfaceFormat::CompatibilityProfile);
}