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    41 

    42 #ifndef QFONT_P_H

    43 #define QFONT_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists for the convenience

    50 // of internal files.  This header file may change from version to version

    51 // without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "QtGui/qfont.h"

    57 #include "QtCore/qmap.h"

    58 #include "QtCore/qobject.h"

    59 #include <private/qunicodetables_p.h>

    60 #include <QtGui/qfontdatabase.h>

    61 #include "private/qfixed_p.h"

    62 

    63 QT_BEGIN_NAMESPACE

    64 

    65 // forwards

    66 class QFontCache;

    67 class QFontEngine;

    68 

    69 struct QFontDef

    70 {

    71     inline QFontDef()

    72         : pointSize(-1.0), pixelSize(-1),

    73           styleStrategy(QFont::PreferDefault), styleHint(QFont::AnyStyle),

    74           weight(50), fixedPitch(false), style(QFont::StyleNormal), stretch(100),

    75           ignorePitch(true)

    76 #ifdef Q_WS_MAC

    77           ,fixedPitchComputed(false)

    78 #endif

    79     {

    80     }

    81 

    82     QString family;

    83 

    84 #ifdef Q_WS_X11

    85     QString addStyle;

    86 #endif // Q_WS_X11

    87 

    88     qreal pointSize;

    89     int pixelSize;

    90 

    91     uint styleStrategy : 16;

    92     uint styleHint     : 8;

    93 

    94     uint weight     :  7; // 0-99

    95     uint fixedPitch :  1;

    96     uint style      :  2;

    97     uint stretch    : 12; // 0-400

    98 

    99     uint ignorePitch : 1;

   100     uint fixedPitchComputed : 1; // for Mac OS X only

   101     int reserved   : 16; // for future extensions

   102 

   103     bool exactMatch(const QFontDef &other) const;

   104     bool operator==(const QFontDef &other) const

   105     {

   106         return pixelSize == other.pixelSize

   107                     && weight == other.weight

   108                     && style == other.style

   109                     && stretch == other.stretch

   110                     && styleHint == other.styleHint

   111                     && styleStrategy == other.styleStrategy

   112                     && ignorePitch == other.ignorePitch && fixedPitch == other.fixedPitch

   113                     && family == other.family

   114 #ifdef Q_WS_X11

   115                     && addStyle == other.addStyle

   116 #endif

   117                           ;

   118     }

   119     inline bool operator<(const QFontDef &other) const

   120     {

   121         if (pixelSize != other.pixelSize) return pixelSize < other.pixelSize;

   122         if (weight != other.weight) return weight < other.weight;

   123         if (style != other.style) return style < other.style;

   124         if (stretch != other.stretch) return stretch < other.stretch;

   125         if (styleHint != other.styleHint) return styleHint < other.styleHint;

   126         if (styleStrategy != other.styleStrategy) return styleStrategy < other.styleStrategy;

   127         if (family != other.family) return family < other.family;

   128 

   129 #ifdef Q_WS_X11

   130         if (addStyle != other.addStyle) return addStyle < other.addStyle;

   131 #endif // Q_WS_X11

   132 

   133         if (ignorePitch != other.ignorePitch) return ignorePitch < other.ignorePitch;

   134         if (fixedPitch != other.fixedPitch) return fixedPitch < other.fixedPitch;

   135         return false;

   136     }

   137 };

   138 

   139 class QFontEngineData

   140 {

   141 public:

   142     QFontEngineData();

   143     ~QFontEngineData();

   144 

   145     QAtomicInt ref;

   146     QFontCache *fontCache;

   147 

   148 #if !defined(Q_WS_MAC)

   149     QFontEngine *engines[QUnicodeTables::ScriptCount];

   150 #else

   151     QFontEngine *engine;

   152 #endif

   153 };

   154 

   155 

   156 class Q_GUI_EXPORT QFontPrivate

   157 {

   158 public:

   159 #ifdef Q_WS_X11

   160     static int defaultEncodingID;

   161 #endif // Q_WS_X11

   162 

   163     QFontPrivate();

   164     QFontPrivate(const QFontPrivate &other);

   165     ~QFontPrivate();

   166 

   167     QFontEngine *engineForScript(int script) const;

   168     void alterCharForCapitalization(QChar &c) const;

   169 

   170     QAtomicInt ref;

   171     QFontDef request;

   172     mutable QFontEngineData *engineData;

   173     int dpi;

   174     int screen;

   175 

   176 #ifdef Q_WS_WIN

   177     HDC hdc;

   178 #endif

   179 

   180     uint rawMode    :  1;

   181     uint underline  :  1;

   182     uint overline   :  1;

   183     uint strikeOut  :  1;

   184     uint kerning    :  1;

   185     uint capital    :  3;

   186     bool letterSpacingIsAbsolute : 1;

   187 

   188     QFixed letterSpacing;

   189     QFixed wordSpacing;

   190 

   191     mutable QFontPrivate *scFont;

   192     QFont smallCapsFont() const { return QFont(smallCapsFontPrivate()); }

   193     QFontPrivate *smallCapsFontPrivate() const;

   194 

   195     void resolve(uint mask, const QFontPrivate *other);

   196 private:

   197     QFontPrivate &operator=(const QFontPrivate &) { return *this; }

   198 };

   199 

   200 

   201 class QFontCache : public QObject

   202 {

   203     Q_OBJECT

   204 public:

   205     // note: these static functions work on a per-thread basis

   206     static QFontCache *instance();

   207     static void cleanup();

   208 

   209     QFontCache();

   210     ~QFontCache();

   211 

   212     void clear();

   213 #if defined(Q_WS_QWS) && !defined(QT_NO_QWS_QPF2)

   214     void removeEngineForFont(const QByteArray &fontName);

   215 #endif

   216     // universal key structure.  QFontEngineDatas and QFontEngines are cached using

   217     // the same keys

   218     struct Key {

   219         Key() : script(0), screen(0) { }

   220         Key(const QFontDef &d, int c, int s = 0)

   221             : def(d), script(c), screen(s) { }

   222 

   223         QFontDef def;

   224         int script;

   225         int screen;

   226 

   227         inline bool operator<(const Key &other) const

   228         {

   229             if (script != other.script) return script < other.script;

   230             if (screen != other.screen) return screen < other.screen;

   231             return def < other.def;

   232         }

   233         inline bool operator==(const Key &other) const

   234         { return def == other.def && script == other.script && screen == other.screen; }

   235     };

   236 

   237     // QFontEngineData cache

   238     typedef QMap<Key,QFontEngineData*> EngineDataCache;

   239     EngineDataCache engineDataCache;

   240 

   241     QFontEngineData *findEngineData(const Key &key) const;

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

   243 

   244     // QFontEngine cache

   245     struct Engine {

   246         Engine() : data(0), timestamp(0), hits(0) { }

   247         Engine(QFontEngine *d) : data(d), timestamp(0), hits(0) { }

   248 

   249         QFontEngine *data;

   250         uint timestamp;

   251         uint hits;

   252     };

   253 

   254     typedef QMap<Key,Engine> EngineCache;

   255     EngineCache engineCache;

   256 

   257     QFontEngine *findEngine(const Key &key);

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

   259 

   260 #if defined(Q_WS_WIN) || defined(Q_WS_QWS)

   261     void cleanupPrinterFonts();

   262 #endif

   263 

   264     private:

   265     void increaseCost(uint cost);

   266     void decreaseCost(uint cost);

   267     void timerEvent(QTimerEvent *event);

   268 

   269     static const uint min_cost;

   270     uint total_cost, max_cost;

   271     uint current_timestamp;

   272     bool fast;

   273     int timer_id;

   274 };

   275 

   276 QT_END_NAMESPACE

   277 

   278 #endif // QFONT_P_H