Make QQuickWidget QRhi-based

When it comes to examples, quickwidget has the direct OpenGL usage
removed because we want this example to be working with any graphics
API. qquickviewcomparison, which features direct OpenGL usage within
its Qt Quick scene, is renamed to a more descriptive name and is also
getting a doc landing page. It continues to be requesting OpenGL (via
QRhi) explicitly.

Change-Id: Iae5b835441f3af229e9746e14dedbe9d1a62b2b9
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 75 insertions, 0 deletions

diff --git a/examples/quick/quickwidgets/qquickwidgetversuswindow_opengl/logo.h b/examples/quick/quickwidgets/qquickwidgetversuswindow_opengl/logo.h
new file mode 100644
index 0000000000..7e58bbb7b7
--- /dev/null
+++ b/examples/quick/quickwidgets/qquickwidgetversuswindow_opengl/logo.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** BSD License Usage
+** Alternatively, 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef LOGO_H
+#define LOGO_H
+
+#include <qopengl.h>
+#include <QList>
+#include <QVector3D>
+
+class Logo
+{
+public:
+    Logo();
+    const GLfloat *constData() const { return m_data.constData(); }
+    int count() const { return m_count; }
+    int vertexCount() const { return m_count / 6; }
+
+private:
+    void quad(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2, GLfloat x3, GLfloat y3, GLfloat x4, GLfloat y4);
+    void extrude(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2);
+    void add(const QVector3D &v, const QVector3D &n);
+
+    QList<GLfloat> m_data;
+    int m_count;
+};
+
+#endif // LOGO_H