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 plugins 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 QOPENGLCOMPOSITOR_H
41#define QOPENGLCOMPOSITOR_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/QTimer>
55#include <QtGui/QOpenGLTextureBlitter>
56#include <QtGui/QMatrix4x4>
57
58QT_BEGIN_NAMESPACE
59
60class QOpenGLContext;
61class QOpenGLFramebufferObject;
62class QWindow;
63class QPlatformTextureList;
64
65class QOpenGLCompositorWindow
66{
67public:
68 virtual ~QOpenGLCompositorWindow() { }
69 virtual QWindow *sourceWindow() const = 0;
70 virtual const QPlatformTextureList *textures() const = 0;
71 virtual void beginCompositing() { }
72 virtual void endCompositing() { }
73};
74
75class QOpenGLCompositor : public QObject
76{
77 Q_OBJECT
78
79public:
80 static QOpenGLCompositor *instance();
81 static void destroy();
82
83 void setTarget(QOpenGLContext *context, QWindow *window, const QRect &nativeTargetGeometry);
84 void setRotation(int degrees);
85 QOpenGLContext *context() const { return m_context; }
86 QWindow *targetWindow() const { return m_targetWindow; }
87
88 void update();
89 QImage grab();
90
91 QList<QOpenGLCompositorWindow *> windows() const { return m_windows; }
92 void addWindow(QOpenGLCompositorWindow *window);
93 void removeWindow(QOpenGLCompositorWindow *window);
94 void moveToTop(QOpenGLCompositorWindow *window);
95 void changeWindowIndex(QOpenGLCompositorWindow *window, int newIdx);
96
97signals:
98 void topWindowChanged(QOpenGLCompositorWindow *window);
99
100private slots:
101 void handleRenderAllRequest();
102
103private:
104 QOpenGLCompositor();
105 ~QOpenGLCompositor();
106
107 void renderAll(QOpenGLFramebufferObject *fbo);
108 void render(QOpenGLCompositorWindow *window);
109
110 QOpenGLContext *m_context;
111 QWindow *m_targetWindow;
112 QRect m_nativeTargetGeometry;
113 int m_rotation;
114 QMatrix4x4 m_rotationMatrix;
115 QTimer m_updateTimer;
116 QOpenGLTextureBlitter m_blitter;
117 QList<QOpenGLCompositorWindow *> m_windows;
118};
119
120QT_END_NAMESPACE
121
122#endif // QOPENGLCOMPOSITOR_H
123

source code of qtbase/src/platformsupport/platformcompositor/qopenglcompositor_p.h