diff --git a/examples/opengl/2dpainting/2dpainting.pro b/examples/opengl/2dpainting/2dpainting.pro
index 08383a4..ef4467c 100644
--- a/examples/opengl/2dpainting/2dpainting.pro
+++ b/examples/opengl/2dpainting/2dpainting.pro
@@ -1,4 +1,4 @@
-QT          += opengl widgets
+QT          += opengl widgets gui-private core-private
 
 HEADERS     = glwidget.h \
               helper.h \
@@ -9,7 +9,7 @@ SOURCES     = glwidget.cpp \
               main.cpp \
               widget.cpp \
               window.cpp
-
+CONFIG+=console
 # install
 target.path = $$[QT_INSTALL_EXAMPLES]/opengl/2dpainting
 INSTALLS += target
diff --git a/examples/opengl/2dpainting/glwidget.cpp b/examples/opengl/2dpainting/glwidget.cpp
index 0443d5b..0aad799 100644
--- a/examples/opengl/2dpainting/glwidget.cpp
+++ b/examples/opengl/2dpainting/glwidget.cpp
@@ -42,10 +42,25 @@
 #include "helper.h"
 
 #include <QTimer>
+#include <QDebug>
+#include <QStringList>
+#include <QCoreApplication>
+
+static inline QGLFormat glFormat()
+{
+    QGLFormat result(QGL::SampleBuffers);
+    if (QCoreApplication::arguments().contains("-a")) {
+        result.setAlphaBufferSize(8);
+    }
+    qDebug() << result;
+    return result;
+}
 
 //! [0]
+//!
+//!
 GLWidget::GLWidget(Helper *helper, QWidget *parent)
-    : QGLWidget(QGLFormat(QGL::SampleBuffers), parent), helper(helper)
+    : QGLWidget(glFormat(), parent), helper(helper)
 {
     elapsed = 0;
     setFixedSize(200, 200);
diff --git a/examples/opengl/2dpainting/main.cpp b/examples/opengl/2dpainting/main.cpp
index 5daff5c..babb38c 100644
--- a/examples/opengl/2dpainting/main.cpp
+++ b/examples/opengl/2dpainting/main.cpp
@@ -41,11 +41,65 @@
 #include "window.h"
 
 #include <QApplication>
+#include <QStringList>
+#include <qpa/qplatformintegration.h>
+#include <private/qguiapplication_p.h>
+
+
+#  include <QWindow>
+#  include <QSurfaceFormat>
+#  include <QDebug>
+
+static void dumpWindowRecursion(QTextStream &str, const QWindow *w, const QWindowList &allWins, int depth = 0)
+{
+    if (depth)
+        str << QString(depth * 2, QLatin1Char(' '));
+    const QRect geom = w->geometry();
+    const QPoint globalPos = w->isTopLevel() ? geom.topLeft() : w->mapToGlobal(geom.topLeft());
+    str << '"' << w->metaObject()->className() << "\"/\"" << w->objectName() << "\" ";
+    if (w->isTopLevel())
+        str << "[top] ";
+    if (w->surfaceType() == QSurface::OpenGLSurface)
+        str << "[gl] ";
+     const QSurfaceFormat format = w->requestedFormat();
+     if (format.hasAlpha())
+         str << "[alpha] ";
+     str << "f=0x" << hex << unsigned(w->flags()) << dec
+        << "\" " << geom.width() << 'x' << geom.height()
+        << forcesign << geom.x() << geom.y()
+        << " Global: " << globalPos.x() << globalPos.y() << noforcesign << '\n';
+    foreach (const QWindow *cw, allWins)
+        if (cw->type() != Qt::Desktop && cw->parent() == w)
+            dumpWindowRecursion(str, cw, allWins, depth + 1);
+}
+static void dumpAllWindows()
+{
+    QString d;
+    QWindowList wins = QGuiApplication::allWindows();
+    QTextStream str(&d);
+    foreach (const QWindow *w, wins)
+        if (w->type() != Qt::Desktop && w->isTopLevel())
+            dumpWindowRecursion(str, w, wins, 0);
+    qDebug().nospace() << d;
+}
 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
     Window window;
+    QStringList args = QCoreApplication::arguments();
+
+    qDebug() << QT_VERSION_STR << "threaded GL"<< QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedOpenGL);
+
+    if (!args.contains("-f")) {
+        qDebug() << "Qt::FramelessWindowHint";
+        window.setWindowFlags(Qt::FramelessWindowHint | Qt::Dialog);
+    }
+    if (!args.contains("-t")) {
+         qDebug() << "Qt::WA_TranslucentBackground";
+        window.setAttribute(Qt::WA_TranslucentBackground);
+    }
     window.show();
+    dumpAllWindows();
     return app.exec();
 }