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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#ifndef DISTANCEFIELDMODELWORKER_H
#define DISTANCEFIELDMODELWORKER_H
#include <QObject>
#include <QRawFont>
#include <QtGui/private/qtextengine_p.h>
QT_BEGIN_NAMESPACE
struct CmapSubtable0;
struct CmapSubtable4;
struct CmapSubtable6;
struct CmapSubtable10;
struct CmapSubtable12;
class DistanceFieldModelWorker : public QObject
{
Q_OBJECT
public:
explicit DistanceFieldModelWorker(QObject *parent = nullptr);
Q_INVOKABLE void generateOneDistanceField();
Q_INVOKABLE void loadFont(const QString &fileName);
void readCmapSubtable(const CmapSubtable0 *subtable, const void *end);
void readCmapSubtable(const CmapSubtable4 *subtable, const void *end);
void readCmapSubtable(const CmapSubtable6 *subtable, const void *end);
void readCmapSubtable(const CmapSubtable10 *subtable, const void *end);
void readCmapSubtable(const CmapSubtable12 *subtable, const void *end);
signals:
void fontLoaded(quint16 glyphCount, bool doubleResolution, qreal pixelSize);
void fontGenerated();
void distanceFieldGenerated(const QImage &distanceField,
const QPainterPath &path,
glyph_t glyphId,
quint32 cmapAssignment);
void error(const QString &errorString);
private:
void readGlyphCount();
void readCmap();
QRawFont m_font;
quint16 m_glyphCount;
quint16 m_nextGlyphId;
bool m_doubleGlyphResolution;
QHash<glyph_t, quint32> m_cmapping;
};
QT_END_NAMESPACE
#endif // DISTANCEFIELDMODELWORKER_H
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