/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#ifndef QFONT_P_H+
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#define QFONT_P_H+
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+
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//+
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//  W A R N I N G+
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//  -------------+
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//+
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// This file is not part of the Qt API.  It exists for the convenience+
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// of internal files.  This header file may change from version to version+
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// without notice, or even be removed.+
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//+
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// We mean it.+
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//+
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+
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#include "QtGui/qfont.h"+
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#include "QtCore/qmap.h"+
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#include "QtCore/qobject.h"+
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#include <private/qunicodetables_p.h>+
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#include <QtGui/qfontdatabase.h>+
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#include "private/qfixed_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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+
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// forwards+
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class QFontCache;+
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class QFontEngine;+
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+
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struct QFontDef+
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{+
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    inline QFontDef()+
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        : pointSize(-1.0), pixelSize(-1),+
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          styleStrategy(QFont::PreferDefault), styleHint(QFont::AnyStyle),+
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          weight(50), fixedPitch(false), style(QFont::StyleNormal), stretch(100),+
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          ignorePitch(true)+
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#ifdef Q_WS_MAC+
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          ,fixedPitchComputed(false)+
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#endif+
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    {+
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    }+
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+
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    QString family;+
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+
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#ifdef Q_WS_X11+
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    QString addStyle;+
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#endif // Q_WS_X11+
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+
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    qreal pointSize;+
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    qreal pixelSize;+
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+
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    uint styleStrategy : 16;+
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    uint styleHint     : 8;+
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+
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    uint weight     :  7; // 0-99+
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    uint fixedPitch :  1;+
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    uint style      :  2;+
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    uint stretch    : 12; // 0-400+
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+
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    uint ignorePitch : 1;+
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    uint fixedPitchComputed : 1; // for Mac OS X only+
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    int reserved   : 16; // for future extensions+
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+
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    bool exactMatch(const QFontDef &other) const;+
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    bool operator==(const QFontDef &other) const+
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    {+
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        return pixelSize == other.pixelSize+
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                    && weight == other.weight+
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                    && style == other.style+
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                    && stretch == other.stretch+
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                    && styleHint == other.styleHint+
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                    && styleStrategy == other.styleStrategy+
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                    && ignorePitch == other.ignorePitch && fixedPitch == other.fixedPitch+
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                    && family == other.family+
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#ifdef Q_WS_X11+
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                    && addStyle == other.addStyle+
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#endif+
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                          ;+
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    }+
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    inline bool operator<(const QFontDef &other) const+
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    {+
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        if (pixelSize != other.pixelSize) return pixelSize < other.pixelSize;+
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        if (weight != other.weight) return weight < other.weight;+
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        if (style != other.style) return style < other.style;+
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        if (stretch != other.stretch) return stretch < other.stretch;+
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        if (styleHint != other.styleHint) return styleHint < other.styleHint;+
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        if (styleStrategy != other.styleStrategy) return styleStrategy < other.styleStrategy;+
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        if (family != other.family) return family < other.family;+
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+
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#ifdef Q_WS_X11+
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        if (addStyle != other.addStyle) return addStyle < other.addStyle;+
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#endif // Q_WS_X11+
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+
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        if (ignorePitch != other.ignorePitch) return ignorePitch < other.ignorePitch;+
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        if (fixedPitch != other.fixedPitch) return fixedPitch < other.fixedPitch;+
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        return false;+
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    }+
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};+
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+
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class QFontEngineData+
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{+
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public:+
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    QFontEngineData();+
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    ~QFontEngineData();+
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+
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    QAtomicInt ref;+
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    QFontCache *fontCache;+
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+
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#if !defined(Q_WS_MAC)+
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    QFontEngine *engines[QUnicodeTables::ScriptCount];+
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#else+
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    QFontEngine *engine;+
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#endif+
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};+
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+
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+
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class Q_GUI_EXPORT QFontPrivate+
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{+
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public:+
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#ifdef Q_WS_X11+
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    static int defaultEncodingID;+
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#endif // Q_WS_X11+
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+
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    QFontPrivate();+
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    QFontPrivate(const QFontPrivate &other);+
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    ~QFontPrivate();+
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+
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    QFontEngine *engineForScript(int script) const;+
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    void alterCharForCapitalization(QChar &c) const;+
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+
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    QAtomicInt ref;+
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    QFontDef request;+
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    mutable QFontEngineData *engineData;+
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    int dpi;+
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    int screen;+
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+
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#ifdef Q_WS_WIN+
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    HDC hdc;+
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#endif+
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+
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    uint rawMode    :  1;+
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    uint underline  :  1;+
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    uint overline   :  1;+
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    uint strikeOut  :  1;+
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    uint kerning    :  1;+
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    uint capital    :  3;+
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    bool letterSpacingIsAbsolute : 1;+
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+
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    QFixed letterSpacing;+
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    QFixed wordSpacing;+
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+
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    mutable QFontPrivate *scFont;+
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    QFont smallCapsFont() const { return QFont(smallCapsFontPrivate()); }+
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    QFontPrivate *smallCapsFontPrivate() const;+
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+
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    void resolve(uint mask, const QFontPrivate *other);+
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private:+
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    QFontPrivate &operator=(const QFontPrivate &) { return *this; }+
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};+
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+
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+
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class QFontCache : public QObject+
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{+
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    Q_OBJECT+
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public:+
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    // note: these static functions work on a per-thread basis+
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    static QFontCache *instance();+
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    static void cleanup();+
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+
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    QFontCache();+
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    ~QFontCache();+
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+
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    void clear();+
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#if defined(Q_WS_QWS) && !defined(QT_NO_QWS_QPF2)+
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    void removeEngineForFont(const QByteArray &fontName);+
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#endif+
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    // universal key structure.  QFontEngineDatas and QFontEngines are cached using+
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    // the same keys+
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    struct Key {+
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        Key() : script(0), screen(0) { }+
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        Key(const QFontDef &d, int c, int s = 0)+
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            : def(d), script(c), screen(s) { }+
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+
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        QFontDef def;+
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        int script;+
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        int screen;+
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+
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        inline bool operator<(const Key &other) const+
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        {+
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            if (script != other.script) return script < other.script;+
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            if (screen != other.screen) return screen < other.screen;+
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            return def < other.def;+
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        }+
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        inline bool operator==(const Key &other) const+
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        { return def == other.def && script == other.script && screen == other.screen; }+
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    };+
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+
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    // QFontEngineData cache+
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    typedef QMap<Key,QFontEngineData*> EngineDataCache;+
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    EngineDataCache engineDataCache;+
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+
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    QFontEngineData *findEngineData(const Key &key) const;+
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    void insertEngineData(const Key &key, QFontEngineData *engineData);+
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+
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    // QFontEngine cache+
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    struct Engine {+
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        Engine() : data(0), timestamp(0), hits(0) { }+
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        Engine(QFontEngine *d) : data(d), timestamp(0), hits(0) { }+
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+
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        QFontEngine *data;+
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        uint timestamp;+
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        uint hits;+
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    };+
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+
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    typedef QMap<Key,Engine> EngineCache;+
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    EngineCache engineCache;+
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+
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    QFontEngine *findEngine(const Key &key);+
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    void insertEngine(const Key &key, QFontEngine *engine);+
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+
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#if defined(Q_WS_WIN) || defined(Q_WS_QWS)+
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    void cleanupPrinterFonts();+
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#endif+
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+
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    private:+
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    void increaseCost(uint cost);+
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    void decreaseCost(uint cost);+
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    void timerEvent(QTimerEvent *event);+
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+
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    static const uint min_cost;+
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    uint total_cost, max_cost;+
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    uint current_timestamp;+
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    bool fast;+
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    int timer_id;+
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};+
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+
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QT_END_NAMESPACE+
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+
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#endif // QFONT_P_H+
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