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// Copyright (C) 2023 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 QFONTICONENGINE_H
#define QFONTICONENGINE_H
#include <QtGui/qiconengine.h>
#ifndef QT_NO_ICON
//
// 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/qfont.h>
QT_BEGIN_NAMESPACE
using glyph_t = quint32;
class Q_GUI_EXPORT QFontIconEngine : public QIconEngine
{
public:
QFontIconEngine(const QString &iconName, const QFont &font);
~QFontIconEngine();
QString iconName() override;
bool isNull() override;
QString key() const override;
QIconEngine *clone() const override;
QList<QSize> availableSizes(QIcon::Mode, QIcon::State) override;
QSize actualSize(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
QPixmap pixmap(const QSize &size, QIcon::Mode mode, QIcon::State state) override;
QPixmap scaledPixmap(const QSize &size, QIcon::Mode mode, QIcon::State state, qreal scale) override;
void paint(QPainter *painter, const QRect &rect, QIcon::Mode mode, QIcon::State state) override;
protected:
virtual QString string() const;
virtual glyph_t glyph() const;
private:
static constexpr quint64 calculateCacheKey(QIcon::Mode mode, QIcon::State state)
{
return (quint64(mode) << 32) | state;
}
const QString m_iconName;
const QFont m_iconFont;
mutable QPixmap m_pixmap;
mutable quint64 m_pixmapCacheKey = {};
static constexpr glyph_t uninitializedGlyph = std::numeric_limits<glyph_t>::max();
mutable glyph_t m_glyph = uninitializedGlyph;
};
QT_END_NAMESPACE
#endif // QT_NO_ICON
#endif // QFONTICONENGINE_H
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