1// Copyright (C) 2016 The Qt Company Ltd.
2// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
3
4#ifndef QWAYLANDSHMBACKINGSTORE_H
5#define QWAYLANDSHMBACKINGSTORE_H
6
7//
8// W A R N I N G
9// -------------
10//
11// This file is not part of the Qt API. It exists purely as an
12// implementation detail. This header file may change from version to
13// version without notice, or even be removed.
14//
15// We mean it.
16//
17
18#include <QtWaylandClient/private/qwaylandbuffer_p.h>
19
20#include <qpa/qplatformbackingstore.h>
21#include <QtGui/QImage>
22#include <qpa/qplatformwindow.h>
23#include <QMutex>
24
25#include <list>
26
27QT_BEGIN_NAMESPACE
28
29namespace QtWaylandClient {
30
31class QWaylandDisplay;
32class QWaylandAbstractDecoration;
33class QWaylandWindow;
34
35class Q_WAYLANDCLIENT_EXPORT QWaylandShmBuffer : public QWaylandBuffer {
36public:
37 QWaylandShmBuffer(QWaylandDisplay *display,
38 const QSize &size, QImage::Format format, qreal scale = 1);
39 ~QWaylandShmBuffer() override;
40 QSize size() const override { return mImage.size(); }
41 int scale() const override { return int(mImage.devicePixelRatio()); }
42 QImage *image() { return &mImage; }
43
44 QImage *imageInsideMargins(const QMargins &margins);
45
46 QRegion &dirtyRegion() { return mDirtyRegion; }
47private:
48 QImage mImage;
49 struct wl_shm_pool *mShmPool = nullptr;
50 QMargins mMargins;
51 QImage *mMarginsImage = nullptr;
52 QRegion mDirtyRegion;
53};
54
55class Q_WAYLANDCLIENT_EXPORT QWaylandShmBackingStore : public QPlatformBackingStore
56{
57public:
58 QWaylandShmBackingStore(QWindow *window, QWaylandDisplay *display);
59 ~QWaylandShmBackingStore() override;
60
61 QPaintDevice *paintDevice() override;
62 void flush(QWindow *window, const QRegion &region, const QPoint &offset) override;
63 void resize(const QSize &size, const QRegion &staticContents) override;
64 void beginPaint(const QRegion &region) override;
65 void endPaint() override;
66
67 QWaylandAbstractDecoration *windowDecoration() const;
68
69 QMargins windowDecorationMargins() const;
70 QImage *entireSurface() const;
71 QImage *contentSurface() const;
72 bool recreateBackBufferIfNeeded();
73
74 QWaylandWindow *waylandWindow() const;
75 void iterateBuffer();
76
77#if QT_CONFIG(opengl)
78 QImage toImage() const override;
79#endif
80
81private:
82 void updateDirtyStates(const QRegion &region);
83 void updateDecorations();
84 QWaylandShmBuffer *getBuffer(const QSize &size, bool &bufferWasRecreated);
85
86 QWaylandDisplay *mDisplay = nullptr;
87 std::list<QWaylandShmBuffer *> mBuffers;
88 QWaylandShmBuffer *mFrontBuffer = nullptr;
89 QWaylandShmBuffer *mBackBuffer = nullptr;
90 bool mPainting = false;
91 bool mPendingFlush = false;
92 QRegion mPendingRegion;
93 QMutex mMutex;
94
95 QSize mRequestedSize;
96 Qt::WindowFlags mCurrentWindowFlags;
97};
98
99}
100
101QT_END_NAMESPACE
102
103#endif
104

source code of qtwayland/src/client/qwaylandshmbackingstore_p.h