1/****************************************************************************
2**
3** Copyright (C) 2016 The Qt Company Ltd.
4** Contact: https://www.qt.io/licensing/
5**
6** This file is part of the QtQuick module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
18** Alternatively, this file may be used under the terms of the GNU Lesser
19** General Public License version 3 as published by the Free Software
20** Foundation and appearing in the file LICENSE.LGPL3 included in the
21** packaging of this file. Please review the following information to
22** ensure the GNU Lesser General Public License version 3 requirements
23** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
24**
25** GNU General Public License Usage
26** Alternatively, this file may be used under the terms of the GNU
27** General Public License version 2.0 or (at your option) the GNU General
28** Public license version 3 or any later version approved by the KDE Free
29** Qt Foundation. The licenses are as published by the Free Software
30** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
31** included in the packaging of this file. Please review the following
32** information to ensure the GNU General Public License requirements will
33** be met: https://www.gnu.org/licenses/gpl-2.0.html and
34** https://www.gnu.org/licenses/gpl-3.0.html.
35**
36** $QT_END_LICENSE$
37**
38****************************************************************************/
39
40#ifndef QSGTHREADEDRENDERLOOP_P_H
41#define QSGTHREADEDRENDERLOOP_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include <QtCore/QThread>
55#include <QtGui/QOpenGLContext>
56#include <private/qsgcontext_p.h>
57
58#include "qsgrenderloop_p.h"
59
60QT_BEGIN_NAMESPACE
61
62class QSGRenderThread;
63
64class QSGThreadedRenderLoop : public QSGRenderLoop
65{
66 Q_OBJECT
67public:
68 QSGThreadedRenderLoop();
69 ~QSGThreadedRenderLoop();
70
71 void show(QQuickWindow *) override {}
72 void hide(QQuickWindow *) override;
73
74 void windowDestroyed(QQuickWindow *window) override;
75 void exposureChanged(QQuickWindow *window) override;
76
77 QImage grab(QQuickWindow *) override;
78
79 void update(QQuickWindow *window) override;
80 void maybeUpdate(QQuickWindow *window) override;
81 void handleUpdateRequest(QQuickWindow *window) override;
82
83 QSGContext *sceneGraphContext() const override;
84 QSGRenderContext *createRenderContext(QSGContext *) const override;
85
86 QAnimationDriver *animationDriver() const override;
87
88 void releaseResources(QQuickWindow *window) override;
89
90 bool event(QEvent *) override;
91 void postJob(QQuickWindow *window, QRunnable *job) override;
92
93 bool interleaveIncubation() const override;
94
95public Q_SLOTS:
96 void animationStarted();
97 void animationStopped();
98
99private:
100 struct Window {
101 QQuickWindow *window;
102 QSGRenderThread *thread;
103 QSurfaceFormat actualWindowFormat;
104 uint updateDuringSync : 1;
105 uint forceRenderPass : 1;
106 };
107
108 friend class QSGRenderThread;
109
110 void releaseResources(Window *window, bool inDestructor);
111 bool checkAndResetForceUpdate(QQuickWindow *window);
112
113 bool anyoneShowing() const;
114 void initialize();
115
116 void startOrStopAnimationTimer();
117 void maybePostPolishRequest(Window *w);
118 void waitForReleaseComplete();
119 void polishAndSync(Window *w, bool inExpose = false);
120 void maybeUpdate(Window *window);
121
122 void handleExposure(QQuickWindow *w);
123 void handleObscurity(Window *w);
124 void releaseSwapchain(QQuickWindow *window);
125
126 bool eventFilter(QObject *watched, QEvent *event) override;
127
128 QSGContext *sg;
129 // Set of contexts that have been created but are now owned by
130 // a rendering thread yet, as the window has never been exposed.
131 mutable QSet<QSGRenderContext*> pendingRenderContexts;
132 QAnimationDriver *m_animation_driver;
133 QList<Window> m_windows;
134
135 int m_animation_timer;
136
137 bool m_lockedForSync;
138};
139
140
141
142QT_END_NAMESPACE
143
144#endif // QSGTHREADEDRENDERLOOP_P_H
145