2 files changed, 9 insertions, 1 deletions
diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
index 66baf162d9..d96158d8f6 100644
--- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
@@ -192,6 +192,14 @@ public:
         : QCoreTextFontEngine(font, def)
         , m_fontData(fontData)
     {}
+    QFontEngine *cloneWithSize(qreal pixelSize) const
+    {
+        QFontDef newFontDef = fontDef;
+        newFontDef.pixelSize = pixelSize;
+        newFontDef.pointSize = pixelSize * 72.0 / qt_defaultDpi();
+
+        return new QCoreTextRawFontEngine(cgFont, newFontDef, m_fontData);
+    }
     QByteArray m_fontData;
 };
 
diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
index 2986f0aaec..d4c5e70cc1 100644
--- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
@@ -125,7 +125,7 @@ public:
     static QFontEngine::GlyphFormat defaultGlyphFormat;
 
     static QCoreTextFontEngine *create(const QByteArray &fontData, qreal pixelSize, QFont::HintingPreference hintingPreference);
-private:
+protected:
     void init();
     QImage imageForGlyph(glyph_t glyph, QFixed subPixelPosition, bool colorful, const QTransform &m);
     CTFontRef ctfont;