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+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of The Qt Company Ltd nor the names of its
+** contributors may be used to endorse or promote products derived
+** from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QGuiApplication>
+#include <QSurfaceFormat>
+#include <QOpenGLContext>
+
+#include "glwindow.h"
+
+// This example demonstrates easy, cross-platform usage of OpenGL ES 3.0 functions via
+// QOpenGLExtraFunctions in an application that works identically on desktop platforms
+// with OpenGL 3.3 and mobile/embedded devices with OpenGL ES 3.0.
+
+// The code is always the same, with the exception of two places: (1) the OpenGL context
+// creation has to have a sufficiently high version number for the features that are in
+// use, and (2) the shader code's version directive is different.
+
+int main(int argc, char *argv[])
+{
+ QSurfaceFormat fmt;
+ fmt.setDepthBufferSize(24);
+
+ // Request OpenGL 3.3 compatibility or OpenGL ES 3.0.
+ if (QOpenGLContext::openGLModuleType() == QOpenGLContext::LibGL) {
+ qDebug("Requesting 3.3 compatibility context");
+ fmt.setVersion(3, 3);
+ fmt.setProfile(QSurfaceFormat::CompatibilityProfile);
+ } else {
+ qDebug("Requesting 3.0 context");
+ fmt.setVersion(3, 0);
+ }
+
+ QSurfaceFormat::setDefaultFormat(fmt);
+
+ QGuiApplication app(argc, argv);
+
+ GLWindow glWindow;
+ glWindow.showMaximized();
+
+ return app.exec();
+}