1/****************************************************************************
2**
3** Copyright (C) 2017 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the examples of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:BSD$
9** Commercial License Usage
10** Licensees holding valid commercial Qt licenses may use this file in
11** accordance with the commercial license agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and The Qt Company. For licensing terms
14** and conditions see https://www.qt.io/terms-conditions. For further
15** information use the contact form at https://www.qt.io/contact-us.
16**
17** BSD License Usage
18** Alternatively, you may use this file under the terms of the BSD license
19** as follows:
20**
21** "Redistribution and use in source and binary forms, with or without
22** modification, are permitted provided that the following conditions are
23** met:
24** * Redistributions of source code must retain the above copyright
25** notice, this list of conditions and the following disclaimer.
26** * Redistributions in binary form must reproduce the above copyright
27** notice, this list of conditions and the following disclaimer in
28** the documentation and/or other materials provided with the
29** distribution.
30** * Neither the name of The Qt Company Ltd nor the names of its
31** contributors may be used to endorse or promote products derived
32** from this software without specific prior written permission.
33**
34**
35** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
36** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
37** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
38** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
39** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
42** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
43** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
44** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
45** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
46**
47** $QT_END_LICENSE$
48**
49****************************************************************************/
50
51#include <QtCore/QThread>
52
53#include <QGuiApplication>
54
55#include <QtGui/private/qguiapplication_p.h>
56#include <QtGui/qpa/qplatformintegration.h>
57
58#include <QtQuick/QQuickView>
59
60#include "threadrenderer.h"
61
62int main(int argc, char **argv)
63{
64 QGuiApplication app(argc, argv);
65
66 if (!QGuiApplicationPrivate::platform_integration->hasCapability(cap: QPlatformIntegration::ThreadedOpenGL)) {
67 QQuickView view;
68 view.setSource(QUrl("qrc:///scenegraph/textureinthread/error.qml"));
69 view.show();
70 return app.exec();
71 }
72
73 int execReturn = 0;
74
75 {
76 QQuickView view;
77
78 // Rendering in a thread introduces a slightly more complicated cleanup
79 // so we ensure that no cleanup of graphics resources happen until the
80 // application is shutting down.
81 view.setPersistentOpenGLContext(true);
82 view.setPersistentSceneGraph(true);
83
84 view.setResizeMode(QQuickView::SizeRootObjectToView);
85 view.setSource(QUrl("qrc:///scenegraph/textureinthread/main.qml"));
86 view.show();
87
88 execReturn = app.exec();
89 }
90
91 // As the render threads make use of our QGuiApplication object
92 // to clean up gracefully, wait for them to finish before
93 // QGuiApp is taken off the heap.
94 for (QThread *t : qAsConst(t&: ThreadRenderer::threads)) {
95 t->wait();
96 delete t;
97 }
98
99 return execReturn;
100}
101

source code of qtdeclarative/examples/quick/scenegraph/textureinthread/main.cpp