qwindowsfontengine_p.h

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// Copyright (C) 2016 The Qt Company Ltd.

// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only

#ifndef QWINDOWSFONTENGINE_H

#define QWINDOWSFONTENGINE_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 <QtGui/private/qfontengine_p.h>

#include <QtGui/QImage>

#include <QtCore/QSharedPointer>

#include <QtCore/QMetaType>

#include <QtCore/qt_windows.h>

QT_BEGIN_NAMESPACE

class QWindowsNativeImage;

class QWindowsFontEngineData;

class QWindowsFontEngine : public QFontEngine

    Q_DISABLE_COPY_MOVE(QWindowsFontEngine)

public:

    QWindowsFontEngine(const QString &name, LOGFONT lf,

                       const QSharedPointer<QWindowsFontEngineData> &fontEngineData);

    ~QWindowsFontEngine() override;

    void initFontInfo(const QFontDef &request,

                      int dpi);

    QFixed lineThickness() const override;

    Properties properties() const override;

    void getUnscaledGlyph(glyph_t glyph, QPainterPath *path, glyph_metrics_t *metrics) override;

    FaceId faceId() const override;

    bool getSfntTableData(uint tag, uchar *buffer, uint *length) const override;

    int synthesized() const override;

    QFixed emSquareSize() const override;

    glyph_t glyphIndex(uint ucs4) const override;

    int stringToCMap(const QChar *str, int len, QGlyphLayout *glyphs, int *nglyphs, ShaperFlags flags) const override;

    void recalcAdvances(QGlyphLayout *glyphs, ShaperFlags) const override;

    void addOutlineToPath(qreal x, qreal y, const QGlyphLayout &glyphs, QPainterPath *path, QTextItem::RenderFlags flags) override;

    void addGlyphsToPath(glyph_t *glyphs, QFixedPoint *positions, int nglyphs,

                         QPainterPath *path, QTextItem::RenderFlags flags) override;

    HGDIOBJ selectDesignFont() const;

    glyph_metrics_t boundingBox(glyph_t g) override { return boundingBox(g, QTransform()); }

    glyph_metrics_t boundingBox(glyph_t g, const QTransform &t) override;

    QFixed xHeight() const override;

    QFixed capHeight() const override;

    QFixed averageCharWidth() const override;

    qreal maxCharWidth() const override;

    qreal minLeftBearing() const override;

    qreal minRightBearing() const override;

    QImage alphaMapForGlyph(glyph_t t) override { return alphaMapForGlyph(t, QTransform()); }

    QImage alphaMapForGlyph(glyph_t, const QTransform &xform) override;

    QImage alphaRGBMapForGlyph(glyph_t t,

                               const QFixedPoint &subPixelPosition,

                               const QTransform &xform) override;

    glyph_metrics_t alphaMapBoundingBox(glyph_t glyph,

                                        const QFixedPoint &,

                                        const QTransform &matrix,

                                        GlyphFormat) override;

    QFontEngine *cloneWithSize(qreal pixelSize) const override;

    Qt::HANDLE handle() const override;

    bool supportsTransformation(const QTransform &transform) const override;

#ifndef Q_CC_MINGW

    void getGlyphBearings(glyph_t glyph, qreal *leftBearing = nullptr, qreal *rightBearing = nullptr) override;

#endif

    bool hasUnreliableGlyphOutline() const override;

    int getGlyphIndexes(const QChar *ch, int numChars, QGlyphLayout *glyphs, int *mappedGlyphs) const;

    void getCMap();

    bool getOutlineMetrics(glyph_t glyph, const QTransform &t, glyph_metrics_t *metrics) const;

    const QSharedPointer<QWindowsFontEngineData> &fontEngineData() const { return m_fontEngineData; }

    void setUniqueFamilyName(const QString &newName) { uniqueFamilyName = newName; }

protected:

    void initializeHeightMetrics() const override;

private:

    QWindowsNativeImage *drawGDIGlyph(HFONT font, glyph_t, int margin, const QTransform &xform,

                                      QImage::Format mask_format);

    bool hasCFFTable() const;

    bool hasCMapTable() const;

    const QSharedPointer<QWindowsFontEngineData> m_fontEngineData;

    const QString     _name;

    QString     uniqueFamilyName;

    HFONT       hfont = 0;

    const LOGFONT     m_logfont;

    uint        ttf        : 1;

    uint        hasOutline : 1;

    uint        hasUnreliableOutline : 1;

    uint        cffTable   : 1;

    TEXTMETRIC  tm;

    const unsigned char *cmap = nullptr;

    int cmapSize = 0;

    QByteArray cmapTable;

    mutable qreal lbearing = SHRT_MIN;

    mutable qreal rbearing = SHRT_MIN;

    QFixed designToDevice;

    int unitsPerEm = 0;

    QFixed x_height = -1;

    FaceId _faceId;

    mutable int synthesized_flags = -1;

    mutable QFixed lineWidth = -1;

    mutable unsigned char *widthCache = nullptr;

    mutable uint widthCacheSize = 0;

    mutable QFixed *designAdvances = nullptr;

    mutable int designAdvancesSize = 0;

};

QT_END_NAMESPACE

QT_DECL_METATYPE_EXTERN(HFONT, Q_GUI_EXPORT)

QT_DECL_METATYPE_EXTERN(LOGFONT, Q_GUI_EXPORT)

#endif // QWINDOWSFONTENGINE_H