summaryrefslogtreecommitdiff
path: root/src/gui/text/qfont_p.h
blob: 0835cad4c1f4a21eee0d5f31ec8eba9654ca5aa6 (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) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFONT_P_H
#define QFONT_P_H

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

#include "QtGui/qfont.h"
#include "QtCore/qmap.h"
#include "QtCore/qobject.h"
#include <private/qunicodetables_p.h>
#include <QtGui/qfontdatabase.h>
#include "private/qfixed_p.h"

QT_BEGIN_NAMESPACE

// forwards
class QFontCache;
class QFontEngine;

struct QFontDef
{
    inline QFontDef()
        : pointSize(-1.0), pixelSize(-1),
          styleStrategy(QFont::PreferDefault), styleHint(QFont::AnyStyle),
          weight(50), fixedPitch(false), style(QFont::StyleNormal), stretch(100),
          ignorePitch(true)
#ifdef Q_WS_MAC
          ,fixedPitchComputed(false)
#endif
    {
    }

    QString family;

#ifdef Q_WS_X11
    QString addStyle;
#endif // Q_WS_X11

    qreal pointSize;
    int pixelSize;

    uint styleStrategy : 16;
    uint styleHint     : 8;

    uint weight     :  7; // 0-99
    uint fixedPitch :  1;
    uint style      :  2;
    uint stretch    : 12; // 0-400

    uint ignorePitch : 1;
    uint fixedPitchComputed : 1; // for Mac OS X only
    int reserved   : 16; // for future extensions

    bool exactMatch(const QFontDef &other) const;
    bool operator==(const QFontDef &other) const
    {
        return pixelSize == other.pixelSize
                    && weight == other.weight
                    && style == other.style
                    && stretch == other.stretch
                    && styleHint == other.styleHint
                    && styleStrategy == other.styleStrategy
                    && ignorePitch == other.ignorePitch && fixedPitch == other.fixedPitch
                    && family == other.family
#ifdef Q_WS_X11
                    && addStyle == other.addStyle
#endif
                          ;
    }
    inline bool operator<(const QFontDef &other) const
    {
        if (pixelSize != other.pixelSize) return pixelSize < other.pixelSize;
        if (weight != other.weight) return weight < other.weight;
        if (style != other.style) return style < other.style;
        if (stretch != other.stretch) return stretch < other.stretch;
        if (styleHint != other.styleHint) return styleHint < other.styleHint;
        if (styleStrategy != other.styleStrategy) return styleStrategy < other.styleStrategy;
        if (family != other.family) return family < other.family;

#ifdef Q_WS_X11
        if (addStyle != other.addStyle) return addStyle < other.addStyle;
#endif // Q_WS_X11

        if (ignorePitch != other.ignorePitch) return ignorePitch < other.ignorePitch;
        if (fixedPitch != other.fixedPitch) return fixedPitch < other.fixedPitch;
        return false;
    }
};

class QFontEngineData
{
public:
    QFontEngineData();
    ~QFontEngineData();

    QAtomicInt ref;
    QFontCache *fontCache;

#if !defined(Q_WS_MAC)
    QFontEngine *engines[QUnicodeTables::ScriptCount];
#else
    QFontEngine *engine;
#endif
};


class Q_GUI_EXPORT QFontPrivate
{
public:
#ifdef Q_WS_X11
    static int defaultEncodingID;
#endif // Q_WS_X11

    QFontPrivate();
    QFontPrivate(const QFontPrivate &other);
    ~QFontPrivate();

    QFontEngine *engineForScript(int script) const;
    void alterCharForCapitalization(QChar &c) const;

    QAtomicInt ref;
    QFontDef request;
    mutable QFontEngineData *engineData;
    int dpi;
    int screen;

#ifdef Q_WS_WIN
    HDC hdc;
#endif

    uint rawMode    :  1;
    uint underline  :  1;
    uint overline   :  1;
    uint strikeOut  :  1;
    uint kerning    :  1;
    uint capital    :  3;
    bool letterSpacingIsAbsolute : 1;

    QFixed letterSpacing;
    QFixed wordSpacing;

    mutable QFontPrivate *scFont;
    QFont smallCapsFont() const { return QFont(smallCapsFontPrivate()); }
    QFontPrivate *smallCapsFontPrivate() const;

    void resolve(uint mask, const QFontPrivate *other);
private:
    QFontPrivate &operator=(const QFontPrivate &) { return *this; }
};


class QFontCache : public QObject
{
    Q_OBJECT
public:
    // note: these static functions work on a per-thread basis
    static QFontCache *instance();
    static void cleanup();

    QFontCache();
    ~QFontCache();

    void clear();
#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_QPF2)
    void removeEngineForFont(const QByteArray &fontName);
#endif
    // universal key structure.  QFontEngineDatas and QFontEngines are cached using
    // the same keys
    struct Key {
        Key() : script(0), screen(0) { }
        Key(const QFontDef &d, int c, int s = 0)
            : def(d), script(c), screen(s) { }

        QFontDef def;
        int script;
        int screen;

        inline bool operator<(const Key &other) const
        {
            if (script != other.script) return script < other.script;
            if (screen != other.screen) return screen < other.screen;
            return def < other.def;
        }
        inline bool operator==(const Key &other) const
        { return def == other.def && script == other.script && screen == other.screen; }
    };

    // QFontEngineData cache
    typedef QMap<Key,QFontEngineData*> EngineDataCache;
    EngineDataCache engineDataCache;

    QFontEngineData *findEngineData(const Key &key) const;
    void insertEngineData(const Key &key, QFontEngineData *engineData);

    // QFontEngine cache
    struct Engine {
        Engine() : data(0), timestamp(0), hits(0) { }
        Engine(QFontEngine *d) : data(d), timestamp(0), hits(0) { }

        QFontEngine *data;
        uint timestamp;
        uint hits;
    };

    typedef QMap<Key,Engine> EngineCache;
    EngineCache engineCache;

    QFontEngine *findEngine(const Key &key);
    void insertEngine(const Key &key, QFontEngine *engine);

#if defined(Q_WS_WIN) || defined(Q_WS_QWS)
    void cleanupPrinterFonts();
#endif

    private:
    void increaseCost(uint cost);
    void decreaseCost(uint cost);
    void timerEvent(QTimerEvent *event);

    static const uint min_cost;
    uint total_cost, max_cost;
    uint current_timestamp;
    bool fast;
    int timer_id;
};

QT_END_NAMESPACE

#endif // QFONT_P_H