1 files changed, 75 insertions, 0 deletions
diff --git a/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h b/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h
new file mode 100644
index 0000000000..093c629a16
--- /dev/null
+++ b/src/gui/text/windows/qwindowsdirectwritefontdatabase_p.h
@@ -0,0 +1,75 @@
+// Copyright (C) 2020 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 QWINDOWSDIRECTWRITEFONTDATABASE_P_H
+#define QWINDOWSDIRECTWRITEFONTDATABASE_P_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/qtguiglobal.h>
+#include <QtGui/private/qtgui-config_p.h>
+
+QT_REQUIRE_CONFIG(directwrite3);
+
+#include "qwindowsfontdatabase_p.h"
+#include <QtCore/qloggingcategory.h>
+
+struct IDWriteFactory;
+struct IDWriteFont;
+struct IDWriteFont1;
+struct IDWriteFontFamily;
+struct IDWriteLocalizedStrings;
+
+QT_BEGIN_NAMESPACE
+
+class Q_GUI_EXPORT QWindowsDirectWriteFontDatabase : public QWindowsFontDatabase
+{
+    Q_DISABLE_COPY_MOVE(QWindowsDirectWriteFontDatabase)
+public:
+    QWindowsDirectWriteFontDatabase();
+    ~QWindowsDirectWriteFontDatabase() override;
+
+    void populateFontDatabase() override;
+    void populateFamily(const QString &familyName) override;
+    bool populateFamilyAliases(const QString &missingFamily) override;
+    QFontEngine *fontEngine(const QFontDef &fontDef, void *handle) override;
+    QFontEngine *fontEngine(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference) override;
+    QStringList fallbacksForFamily(const QString &family, QFont::Style style, QFont::StyleHint styleHint, QChar::Script script) const override;
+    QStringList addApplicationFont(const QByteArray &fontData, const QString &fileName, QFontDatabasePrivate::ApplicationFont *font = nullptr) override;
+    QFont defaultFont() const override;
+
+    bool isPrivateFontFamily(const QString &family) const override;
+    bool supportsVariableApplicationFonts() const override;
+
+    void registerBitmapFont(const QString &bitmapFont)
+    {
+        m_populatedBitmapFonts.insert(bitmapFont);
+    }
+
+    bool hasPopulatedFont(const QString &fontFamily) const
+    {
+        return m_populatedFonts.contains(fontFamily);
+    }
+
+private:
+    friend class QWindowsFontEngineDirectWrite;
+    static QString localeString(IDWriteLocalizedStrings *names, wchar_t localeName[]);
+
+    QSupportedWritingSystems supportedWritingSystems(IDWriteFontFace *face) const;
+
+    QHash<QString, IDWriteFontFamily *> m_populatedFonts;
+    QSet<QString> m_populatedBitmapFonts;
+};
+
+QT_END_NAMESPACE
+
+#endif // QWINDOWSDIRECTWRITEFONTDATABASE_P_H