1 files changed, 53 insertions, 0 deletions
diff --git a/examples/opengl/paintedwindow/paintedwindow.cpp b/examples/opengl/paintedwindow/paintedwindow.cpp
new file mode 100644
index 0000000000..9b27c56914
--- /dev/null
+++ b/examples/opengl/paintedwindow/paintedwindow.cpp
@@ -0,0 +1,53 @@
+#include "paintedwindow.h"
+
+#include <QOpenGLContext>
+#include <QOpenGLPaintDevice>
+#include <QPainter>
+#include <QTimer>
+
+#include <qmath.h>
+
+PaintedWindow::PaintedWindow()
+{
+    QSurfaceFormat format;
+    format.setStencilBufferSize(8);
+    format.setSamples(4);
+
+    setSurfaceType(QWindow::OpenGLSurface);
+    setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
+    setFormat(format);
+
+    create();
+
+    m_context = new QOpenGLContext(this);
+    m_context->setFormat(format);
+    m_context->create();
+}
+
+void PaintedWindow::resizeEvent(QResizeEvent *)
+{
+    paint();
+}
+
+void PaintedWindow::exposeEvent(QExposeEvent *)
+{
+    paint();
+}
+
+void PaintedWindow::paint()
+{
+    m_context->makeCurrent(this);
+
+    QPainterPath path;
+    path.addEllipse(0, 0, width(), height());
+
+    QOpenGLPaintDevice device(size());
+
+    QPainter painter(&device);
+    painter.fillRect(0, 0, width(), height(), Qt::white);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.fillPath(path, Qt::blue);
+    painter.end();
+
+    m_context->swapBuffers(this);
+}