src/client/qwaylandshmbackingstore_p.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QWAYLANDSHMBACKINGSTORE_H
#define QWAYLANDSHMBACKINGSTORE_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtWaylandClient/private/qwaylandbuffer_p.h>

#include <qpa/qplatformbackingstore.h>
#include <QtGui/QImage>
#include <qpa/qplatformwindow.h>
#include <QMutex>

#include <list>

QT_BEGIN_NAMESPACE

namespace QtWaylandClient {

class QWaylandDisplay;
class QWaylandAbstractDecoration;
class QWaylandWindow;

class Q_WAYLANDCLIENT_EXPORT QWaylandShmBuffer : public QWaylandBuffer {
public:
    QWaylandShmBuffer(QWaylandDisplay *display,
           const QSize &size, QImage::Format format, qreal scale = 1);
    ~QWaylandShmBuffer() override;
    QSize size() const override { return mImage.size(); }
    int scale() const override { return int(mImage.devicePixelRatio()); }
    QImage *image() { return &mImage; }

    QImage *imageInsideMargins(const QMargins &margins);
private:
    QImage mImage;
    struct wl_shm_pool *mShmPool = nullptr;
    QMargins mMargins;
    QImage *mMarginsImage = nullptr;
};

class Q_WAYLANDCLIENT_EXPORT QWaylandShmBackingStore : public QPlatformBackingStore
{
public:
    QWaylandShmBackingStore(QWindow *window, QWaylandDisplay *display);
    ~QWaylandShmBackingStore() override;

    QPaintDevice *paintDevice() override;
    void flush(QWindow *window, const QRegion &region, const QPoint &offset) override;
    void resize(const QSize &size, const QRegion &staticContents) override;
    void resize(const QSize &size);
    void beginPaint(const QRegion &region) override;
    void endPaint() override;

    QWaylandAbstractDecoration *windowDecoration() const;

    QMargins windowDecorationMargins() const;
    QImage *entireSurface() const;
    QImage *contentSurface() const;
    void ensureSize();

    QWaylandWindow *waylandWindow() const;
    void iterateBuffer();

#if QT_CONFIG(opengl)
    QImage toImage() const override;
#endif

private:
    void updateDecorations();
    QWaylandShmBuffer *getBuffer(const QSize &size);

    QWaylandDisplay *mDisplay = nullptr;
    std::list<QWaylandShmBuffer *> mBuffers;
    QWaylandShmBuffer *mFrontBuffer = nullptr;
    QWaylandShmBuffer *mBackBuffer = nullptr;
    bool mPainting = false;
    bool mPendingFlush = false;
    QRegion mPendingRegion;
    QMutex mMutex;

    QSize mRequestedSize;
    Qt::WindowFlags mCurrentWindowFlags;
};

}

QT_END_NAMESPACE

#endif