Fix crash when trying to create paths for color-glyphs (Emoji) on Mac

CoreText segfaults when creating paths for color-glyphs:

  0  0x00007fff8fd41e69 in TFont::FindColourBitmapForGlyph ()
  1  0x00007fff8fd417ac in TFont::CreatePathForGlyph ()
  2  0x000000010567d1af in QCoreTextFontEngine::addGlyphsToPath (...)

So we shortcut the code-path, since we don't support Emoji yet anyways.

Task-number: QTBUG-28615
Change-Id: Ife16ae4959077d9eaaf6ea5cd1f27a4e2e01e7f5
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
index 6c5c557b13..b3a0968c4b 100644
--- a/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
+++ b/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
@@ -108,6 +108,21 @@ public:
     virtual QFontEngine *cloneWithSize(qreal pixelSize) const;
     virtual int glyphMargin(QFontEngineGlyphCache::Type type) { Q_UNUSED(type); return 0; }
 
+    static bool supportsColorGlyphs()
+    {
+#if defined(Q_OS_IOS)
+        return true;
+#elif MAC_OS_X_VERSION_MAX_ALLOWED >= 1070
+  #if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
+        return &CTFontDrawGlyphs;
+  #else
+        return true;
+  #endif
+#else
+        return false;
+#endif
+    }
+
     static int antialiasingThreshold;
     static QFontEngineGlyphCache::Type defaultGlyphFormat;