qdistancefield_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 QDISTANCEFIELD_H
#define QDISTANCEFIELD_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/qtguiglobal_p.h>
#include <qrawfont.h>
#include <private/qfontengine_p.h>
#include <QtCore/qshareddata.h>
#include <QtCore/qglobal.h>
#include <QLoggingCategory>
 
QT_BEGIN_NAMESPACE
 
bool Q_GUI_EXPORT qt_fontHasNarrowOutlines(const QRawFont &f);
bool Q_GUI_EXPORT qt_fontHasNarrowOutlines(QFontEngine *fontEngine);
 
int Q_GUI_EXPORT QT_DISTANCEFIELD_BASEFONTSIZE(bool narrowOutlineFont);
int Q_GUI_EXPORT QT_DISTANCEFIELD_TILESIZE(bool narrowOutlineFont);
int Q_GUI_EXPORT QT_DISTANCEFIELD_SCALE(bool narrowOutlineFont);
int Q_GUI_EXPORT QT_DISTANCEFIELD_RADIUS(bool narrowOutlineFont);
int Q_GUI_EXPORT QT_DISTANCEFIELD_HIGHGLYPHCOUNT();
 
class Q_GUI_EXPORT QDistanceFieldData : public QSharedData
{
public:
    QDistanceFieldData() : glyph(0), width(0), height(0), nbytes(0), data(nullptr) {}
    QDistanceFieldData(const QDistanceFieldData &other);
    ~QDistanceFieldData();
 
    static QDistanceFieldData *create(const QSize &size);
    static QDistanceFieldData *create(const QPainterPath &path, bool doubleResolution);
 
    glyph_t glyph;
    int width;
    int height;
    int nbytes;
    uchar *data;
};
 
class Q_GUI_EXPORT QDistanceField
{
public:
    QDistanceField();
    QDistanceField(int width, int height);
    QDistanceField(const QRawFont &font, glyph_t glyph, bool doubleResolution = false);
    QDistanceField(QFontEngine *fontEngine, glyph_t glyph, bool doubleResolution = false);
    QDistanceField(const QPainterPath &path, glyph_t glyph, bool doubleResolution = false);
 
    bool isNull() const;
 
    glyph_t glyph() const;
    void setGlyph(const QRawFont &font, glyph_t glyph, bool doubleResolution = false);
    void setGlyph(QFontEngine *fontEngine, glyph_t glyph, bool doubleResolution = false);
 
    int width() const;
    int height() const;
 
    QDistanceField copy(const QRect &rect = QRect()) const;
    inline QDistanceField copy(int x, int y, int w, int h) const
        { return copy(QRect(x, y, w, h)); }
 
    uchar *bits();
    const uchar *bits() const;
    const uchar *constBits() const;
 
    uchar *scanLine(int);
    const uchar *scanLine(int) const;
    const uchar *constScanLine(int) const;
 
    QImage toImage(QImage::Format format = QImage::Format_ARGB32_Premultiplied) const;
 
private:
    QDistanceField(QDistanceFieldData *data);
    QSharedDataPointer<QDistanceFieldData> d;
 
    friend class QDistanceFieldData;
};
 
QT_END_NAMESPACE
 
#endif // QDISTANCEFIELD_H