Use english name to match font in windows platform

In windows platform, simplified chinese envrionment, the default font
family name is "SimSun" which is not in the font list generated by
EnumFontFamiliesEx(), this will cause chinese font can't be displayed.

This patch will generate font's english name during font enumeration in
windows platform, and take font's english name into consideration in font
matching. The english name generation code is taken from Qt4.8

Change-Id: Ie939ec0c8c08c628a835c7a53fb22d0545626d9c
Reviewed-by: Jiang Jiang <jiang.jiang@nokia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gui/text/qfontdatabase_qpa.cpp b/src/gui/text/qfontdatabase_qpa.cpp
index c3d7529c2e..2a9c37fb13 100644
--- a/src/gui/text/qfontdatabase_qpa.cpp
+++ b/src/gui/text/qfontdatabase_qpa.cpp
@@ -87,6 +87,22 @@ Q_GUI_EXPORT  void qt_registerFont(const QString &familyName, const QString &fou
     size->handle = handle;
 }
 
+Q_GUI_EXPORT void qt_registerAliasToFontFamily(const QString &familyName, const QString &alias)
+{
+    if (alias.isEmpty())
+        return;
+
+    QFontDatabasePrivate *d = privateDb();
+    QtFontFamily *f = d->family(familyName, false);
+    if (!f)
+        return;
+
+    if (f->aliases.contains(alias, Qt::CaseInsensitive))
+        return;
+
+    f->aliases.push_back(alias);
+}
+
 static QStringList fallbackFamilies(const QString &family, const QFont::Style &style, const QFont::StyleHint &styleHint, const QUnicodeTables::Script &script)
 {
     QStringList retList = QGuiApplicationPrivate::platformIntegration()->fontDatabase()->fallbacksForFamily(family,style,styleHint,script);