/****************************************************************************
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
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** This file is part of the plugins of the Qt Toolkit.
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** 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:
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** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** 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
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** file. Please review the following information to ensure the GNU General
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** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QWINDOWSFONTDATABASE_H
#define QWINDOWSFONTDATABASE_H

#include <qpa/qplatformfontdatabase.h>
#include <QtCore/QSharedPointer>
#include "qtwindows_additional.h"

QT_BEGIN_NAMESPACE

#if !defined(QT_NO_DIRECTWRITE)
    struct IDWriteFactory;
    struct IDWriteGdiInterop;
#endif

class QWindowsFontEngineData
{
    Q_DISABLE_COPY(QWindowsFontEngineData)
public:
    QWindowsFontEngineData();
    ~QWindowsFontEngineData();

    uint pow_gamma[256];

    bool clearTypeEnabled;
    qreal fontSmoothingGamma;
    HDC hdc;
#if !defined(QT_NO_DIRECTWRITE)
    IDWriteFactory *directWriteFactory;
    IDWriteGdiInterop *directWriteGdiInterop;
#endif
};

class QWindowsFontDatabase : public QPlatformFontDatabase
{
public:
    QWindowsFontDatabase();
    ~QWindowsFontDatabase();

    virtual void populateFontDatabase();
    virtual QFontEngine *fontEngine(const QFontDef &fontDef, QUnicodeTables::Script script, void *handle);
    virtual QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference);
    virtual QStringList fallbacksForFamily(const QString family, const QFont::Style &style, const QFont::StyleHint &styleHint, const QUnicodeTables::Script &script) const;
    virtual QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName);
    virtual void releaseHandle(void *handle);
    virtual QString fontDir() const;

    virtual QFont defaultFont() const { return systemDefaultFont(); }
    virtual bool fontsAlwaysScalable() const;
    void derefUniqueFont(const QString &uniqueFont);
    void refUniqueFont(const QString &uniqueFont);

    static QFont systemDefaultFont();

    static QFontEngine *createEngine(int script, const QFontDef &request,
                                     HDC fontHdc, int dpi, bool rawMode,
                                     const QStringList &family_list,
                                     const QSharedPointer<QWindowsFontEngineData> &data);

    static HFONT systemFont();
    static QFont LOGFONT_to_QFont(const LOGFONT& lf, int verticalDPI = 0);

    static qreal fontSmoothingGamma();

private:
    void populate(const QString &family = QString());
    void removeApplicationFonts();
    QSharedPointer<QWindowsFontEngineData> m_fontEngineData;
    QSet<QString> m_families;

    struct WinApplicationFont {
        HANDLE handle;
        QString fileName;
    };

    QList<WinApplicationFont> m_applicationFonts;

    struct UniqueFontData {
        HANDLE handle;
        QAtomicInt refCount;
    };

    QMap<QString, UniqueFontData> m_uniqueFontData;
};

QT_END_NAMESPACE

#endif // QWINDOWSFONTDATABASE_H