File: qfontengine_win_p.h

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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QFONTENGINE_WIN_P_H
#define QFONTENGINE_WIN_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 <QtCore/qconfig.h>

QT_BEGIN_NAMESPACE

class QNativeImage;

class QFontEngineWin : public QFontEngine
{
public:
    QFontEngineWin(const QString &name, HFONT, bool, LOGFONT);
    ~QFontEngineWin();

    virtual QFixed lineThickness() const;
    virtual Properties properties() const;
    virtual void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics);
    virtual FaceId faceId() const;
    virtual bool getSfntTableData(uint tag, uchar *buffer, uint *length) const;
    virtual int synthesized() const;
    virtual QFixed emSquareSize() const;

    virtual bool stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, QTextEngine::ShaperFlags flags) const;
    virtual void recalcAdvances(QGlyphLayout *glyphs, QTextEngine::ShaperFlags) const;

    virtual void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags);
    virtual void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,
                         QPainterPath *path, QTextItem::RenderFlags flags);

    HGDIOBJ selectDesignFont() const;

    virtual glyph_metrics_t boundingBox(const QGlyphLayout &glyphs);
    virtual glyph_metrics_t boundingBox(glyph_t g) { return boundingBox(g, QTransform()); }
    virtual glyph_metrics_t boundingBox(glyph_t g, const QTransform &t);


    virtual QFixed ascent() const;
    virtual QFixed descent() const;
    virtual QFixed leading() const;
    virtual QFixed xHeight() const;
    virtual QFixed averageCharWidth() const;
    virtual qreal maxCharWidth() const;
    virtual qreal minLeftBearing() const;
    virtual qreal minRightBearing() const;

    virtual const char *name() const;

    bool canRender(const QChar *string, int len);

    Type type() const;

    virtual QImage alphaMapForGlyph(glyph_t t) { return alphaMapForGlyph(t, QTransform()); }
    virtual QImage alphaMapForGlyph(glyph_t, const QTransform &xform);
    virtual QImage alphaRGBMapForGlyph(glyph_t t, QFixed subPixelPosition, int margin, const QTransform &xform);

    virtual QFontEngine *cloneWithSize(qreal pixelSize) const;

#ifndef Q_CC_MINGW
    virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = 0, qreal *rightBearing = 0);
#endif

    int getGlyphIndexes(const QChar *ch, int numChars, QGlyphLayout *glyphs, bool mirrored) const;
    void getCMap();

#ifndef Q_WS_WINCE
    bool getOutlineMetrics(glyph_t glyph, const QTransform &t, glyph_metrics_t *metrics) const;
#endif

    QString     _name;
    QString     uniqueFamilyName;
    HFONT       hfont;
    LOGFONT     logfont;
    uint        stockFont  : 1;
    uint        ttf        : 1;
    uint        hasOutline : 1;
    uint        cffTable   : 1;
    TEXTMETRIC  tm;
    int         lw;
    const unsigned char *cmap;
    QByteArray cmapTable;
    mutable qreal lbearing;
    mutable qreal rbearing;
    QFixed designToDevice;
    int unitsPerEm;
    QFixed x_height;
    FaceId _faceId;

    mutable int synthesized_flags;
    mutable QFixed lineWidth;
    mutable unsigned char *widthCache;
    mutable uint widthCacheSize;
    mutable QFixed *designAdvances;
    mutable int designAdvancesSize;
    int cmapSize;

private:
    bool hasCFFTable() const;
    bool hasCMapTable() const;
    QNativeImage *drawGDIGlyph(HFONT font, glyph_t, int margin, const QTransform &xform,
                               QImage::Format mask_format);

};

class QFontEngineMultiWin : public QFontEngineMulti
{
public:
    QFontEngineMultiWin(QFontEngine *first, const QStringList &fallbacks);
    void loadEngine(int at);

    QStringList fallbacks;
};

QT_END_NAMESPACE

#endif // QFONTENGINE_WIN_P_H