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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 QPLATFORMFONTDATABASE_H
#define QPLATFORMFONTDATABASE_H
//
// W A R N I N G
// -------------
//
// This file is part of the QPA API and is not meant to be used
// in applications. Usage of this API may make your code
// source and binary incompatible with future versions of Qt.
//
#include <QtGui/qtguiglobal.h>
#include <QtCore/qloggingcategory.h>
#include <QtCore/QString>
#include <QtCore/QStringList>
#include <QtCore/QList>
#include <QtGui/QFontDatabase>
#include <QtGui/private/qfontengine_p.h>
#include <QtGui/private/qfont_p.h>
#include <QtGui/private/qfontdatabase_p.h>
QT_BEGIN_NAMESPACE
Q_DECLARE_EXPORTED_LOGGING_CATEGORY(lcQpaFonts, Q_GUI_EXPORT)
class QWritingSystemsPrivate;
class Q_GUI_EXPORT QSupportedWritingSystems
{
public:
QSupportedWritingSystems();
QSupportedWritingSystems(const QSupportedWritingSystems &other);
QSupportedWritingSystems &operator=(const QSupportedWritingSystems &other);
~QSupportedWritingSystems();
void setSupported(QFontDatabase::WritingSystem, bool supported = true);
bool supported(QFontDatabase::WritingSystem) const;
private:
void detach();
QWritingSystemsPrivate *d;
friend Q_GUI_EXPORT bool operator==(const QSupportedWritingSystems &, const QSupportedWritingSystems &);
friend Q_GUI_EXPORT bool operator!=(const QSupportedWritingSystems &, const QSupportedWritingSystems &);
#ifndef QT_NO_DEBUG_STREAM
friend Q_GUI_EXPORT QDebug operator<<(QDebug, const QSupportedWritingSystems &);
#endif
};
Q_GUI_EXPORT bool operator==(const QSupportedWritingSystems &, const QSupportedWritingSystems &);
Q_GUI_EXPORT bool operator!=(const QSupportedWritingSystems &, const QSupportedWritingSystems &);
#ifndef QT_NO_DEBUG_STREAM
Q_GUI_EXPORT QDebug operator<<(QDebug, const QSupportedWritingSystems &);
#endif
class QFontRequestPrivate;
class QFontEngineMulti;
class Q_GUI_EXPORT QPlatformFontDatabase
{
public:
virtual ~QPlatformFontDatabase();
virtual void populateFontDatabase();
virtual bool populateFamilyAliases(const QString &missingFamily) { Q_UNUSED(missingFamily); return false; }
virtual void populateFamily(const QString &familyName);
virtual void invalidate();
virtual QStringList fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const;
virtual QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName, QFontDatabasePrivate::ApplicationFont *font = nullptr);
virtual QFontEngine *fontEngine(const QFontDef &fontDef, void *handle);
virtual QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference);
virtual QFontEngineMulti *fontEngineMulti(QFontEngine *fontEngine, QChar::Script script);
virtual void releaseHandle(void *handle);
virtual QString fontDir() const;
virtual QFont defaultFont() const;
virtual bool isPrivateFontFamily(const QString &family) const;
virtual QString resolveFontFamilyAlias(const QString &family) const;
virtual bool fontsAlwaysScalable() const;
virtual QList<int> standardSizes() const;
virtual bool supportsVariableApplicationFonts() const;
// helper
static QSupportedWritingSystems writingSystemsFromTrueTypeBits(quint32 unicodeRange[4], quint32 codePageRange[2]);
static QSupportedWritingSystems writingSystemsFromOS2Table(const char *os2Table, size_t length);
//callback
static void registerFont(const QString &familyname, const QString &stylename,
const QString &foundryname, QFont::Weight weight,
QFont::Style style, QFont::Stretch stretch, bool antialiased,
bool scalable, int pixelSize, bool fixedPitch,
const QSupportedWritingSystems &writingSystems, void *handle);
static void registerFontFamily(const QString &familyName);
static void registerAliasToFontFamily(const QString &familyName, const QString &alias);
static void repopulateFontDatabase();
static bool isFamilyPopulated(const QString &familyName);
};
QT_END_NAMESPACE
#endif // QPLATFORMFONTDATABASE_H
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