summaryrefslogtreecommitdiffstats
path: root/src/gui/painting/qbackingstore_p.h
blob: 792d43cf945d2dde0938a820715493c5657450f5 (plain)
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QBACKINGSTORE_P_H
#define QBACKINGSTORE_P_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 <QDebug>
#include <QtGui/qwidget.h>
#include <private/qwidget_p.h>
#include <private/qwindowsurface_p.h>
#ifdef Q_WS_QWS
#include <private/qwindowsurface_qws_p.h>
#endif

QT_BEGIN_NAMESPACE

class QWindowSurface;

struct BeginPaintInfo {
    inline BeginPaintInfo() : wasFlushed(0), nothingToPaint(0), windowSurfaceRecreated(0) {}
    uint wasFlushed : 1;
    uint nothingToPaint : 1;
    uint windowSurfaceRecreated : 1;
};

class Q_AUTOTEST_EXPORT QWidgetBackingStore
{
public:
    QWidgetBackingStore(QWidget *t);
    ~QWidgetBackingStore();

    static void showYellowThing(QWidget *widget, const QRegion &rgn, int msec, bool);

    void sync(QWidget *exposedWidget, const QRegion &exposedRegion);
    void sync();
    void flush(QWidget *widget = 0, QWindowSurface *surface = 0);

    inline QPoint topLevelOffset() const { return tlwOffset; }

    QWindowSurface *surface() const { return windowSurface; }

    inline bool isDirty() const
    {
        return !(dirtyWidgets.isEmpty() && dirty.isEmpty() && !hasDirtyFromPreviousSync
                 && !fullUpdatePending
#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER)
                 && !hasDirtyWindowDecoration()
#endif
                );
    }

    // ### Qt 4.6: Merge into a template function (after MSVC isn't supported anymore).
    void markDirty(const QRegion &rgn, QWidget *widget, bool updateImmediately = false,
                   bool invalidateBuffer = false);
    void markDirty(const QRect &rect, QWidget *widget, bool updateImmediately = false,
                   bool invalidateBuffer = false);

private:
    QWidget *tlw;
    QRegion dirtyOnScreen; // needsFlush
    QRegion dirty; // needsRepaint
    QRegion dirtyFromPreviousSync;
    QVector<QWidget *> dirtyWidgets;
    QVector<QWidget *> *dirtyOnScreenWidgets;
    QList<QWidget *> staticWidgets;
    QWindowSurface *windowSurface;
#ifdef Q_BACKINGSTORE_SUBSURFACES
    QList<QWindowSurface*> subSurfaces;
#endif
    uint hasDirtyFromPreviousSync : 1;
    uint fullUpdatePending : 1;

    QPoint tlwOffset;

    static bool flushPaint(QWidget *widget, const QRegion &rgn);
    static void unflushPaint(QWidget *widget, const QRegion &rgn);

    bool bltRect(const QRect &rect, int dx, int dy, QWidget *widget);
    void releaseBuffer();

    void beginPaint(QRegion &toClean, QWidget *widget, QWindowSurface *windowSurface,
                    BeginPaintInfo *returnInfo, bool toCleanIsInTopLevelCoordinates = true);
    void endPaint(const QRegion &cleaned, QWindowSurface *windowSurface, BeginPaintInfo *beginPaintInfo);

    QRegion dirtyRegion(QWidget *widget = 0) const;
    QRegion staticContents(QWidget *widget = 0, const QRect &withinClipRect = QRect()) const;

    void markDirtyOnScreen(const QRegion &dirtyOnScreen, QWidget *widget, const QPoint &topLevelOffset);

    void removeDirtyWidget(QWidget *w);

#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_MANAGER)
    bool hasDirtyWindowDecoration() const;
    void paintWindowDecoration();
#endif
    void updateLists(QWidget *widget);

    inline void addDirtyWidget(QWidget *widget, const QRegion &rgn)
    {
        if (widget && !widget->d_func()->inDirtyList && !widget->data->in_destructor) {
            QWidgetPrivate *widgetPrivate = widget->d_func();
#ifndef QT_NO_GRAPHICSEFFECT
            if (widgetPrivate->graphicsEffect)
                widgetPrivate->dirty = widgetPrivate->effectiveRectFor(rgn.boundingRect());
            else
#endif //QT_NO_GRAPHICSEFFECT
                widgetPrivate->dirty = rgn;
            dirtyWidgets.append(widget);
            widgetPrivate->inDirtyList = true;
        }
    }

    inline void dirtyWidgetsRemoveAll(QWidget *widget)
    {
        int i = 0;
        while (i < dirtyWidgets.size()) {
            if (dirtyWidgets.at(i) == widget)
                dirtyWidgets.remove(i);
            else
                ++i;
        }
    }

    inline void addStaticWidget(QWidget *widget)
    {
        if (!widget)
            return;

        Q_ASSERT(widget->testAttribute(Qt::WA_StaticContents));
        if (!staticWidgets.contains(widget))
            staticWidgets.append(widget);
    }

    inline void removeStaticWidget(QWidget *widget)
    { staticWidgets.removeAll(widget); }

    // Move the reparented widget and all its static children from this backing store
    // to the new backing store if reparented into another top-level / backing store.
    inline void moveStaticWidgets(QWidget *reparented)
    {
        Q_ASSERT(reparented);
        QWidgetBackingStore *newBs = reparented->d_func()->maybeBackingStore();
        if (newBs == this)
            return;

        int i = 0;
        while (i < staticWidgets.size()) {
            QWidget *w = staticWidgets.at(i);
            if (reparented == w || reparented->isAncestorOf(w)) {
                staticWidgets.removeAt(i);
                if (newBs)
                    newBs->addStaticWidget(w);
            } else {
                ++i;
            }
        }
    }

    inline QRect topLevelRect() const
    {
#ifdef Q_WS_QWS
        return tlw->frameGeometry();
#else
        return tlw->data->crect;
#endif
    }

    inline void appendDirtyOnScreenWidget(QWidget *widget)
    {
        if (!widget)
            return;

        if (!dirtyOnScreenWidgets) {
            dirtyOnScreenWidgets = new QVector<QWidget *>;
            dirtyOnScreenWidgets->append(widget);
        } else if (!dirtyOnScreenWidgets->contains(widget)) {
            dirtyOnScreenWidgets->append(widget);
        }
    }

    inline void dirtyOnScreenWidgetsRemoveAll(QWidget *widget)
    {
        if (!widget || !dirtyOnScreenWidgets)
            return;

        int i = 0;
        while (i < dirtyOnScreenWidgets->size()) {
            if (dirtyOnScreenWidgets->at(i) == widget)
                dirtyOnScreenWidgets->remove(i);
            else
                ++i;
        }
    }

    inline void resetWidget(QWidget *widget)
    {
        if (widget) {
            widget->d_func()->inDirtyList = false;
            widget->d_func()->isScrolled = false;
            widget->d_func()->isMoved = false;
            widget->d_func()->dirty = QRegion();
        }
    }

    inline void updateStaticContentsSize()
    {
        for (int i = 0; i < staticWidgets.size(); ++i) {
            QWidgetPrivate *wd = staticWidgets.at(i)->d_func();
            if (!wd->extra)
                wd->createExtra();
            wd->extra->staticContentsSize = wd->data.crect.size();
        }
    }

    inline bool hasStaticContents() const
    { return !staticWidgets.isEmpty() && windowSurface->hasFeature(QWindowSurface::StaticContents); }

    friend QRegion qt_dirtyRegion(QWidget *);
    friend class QWidgetPrivate;
    friend class QWidget;
    friend class QWSManagerPrivate;
    friend class QETWidget;
    friend class QWindowSurface;
    friend class QWSWindowSurface;
};

QT_END_NAMESPACE

#endif // QBACKINGSTORE_P_H