Add virtual function to QFontEngine report if outlines are reliable

GetGlyphOutline fails for ttf fonts with embedded bitmaps. This results in
distancefield rendering not rendering glyphs (for the failed paths). We
need to fall back to texture rendering if this is the case.

Change-Id: Ibdf7dc5c1d34f513c436f88fabbdcc4089bb6fef
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/src/plugins/platforms/windows/qwindowsfontengine.h b/src/plugins/platforms/windows/qwindowsfontengine.h
index 7a0803830c..0ddf778fa0 100644
--- a/src/plugins/platforms/windows/qwindowsfontengine.h
+++ b/src/plugins/platforms/windows/qwindowsfontengine.h
@@ -122,6 +122,8 @@ public:
     virtual void getGlyphBearings(glyph_t glyph, qreal *leftBearing = 0, qreal *rightBearing = 0);
 #endif
 
+    bool hasUnreliableGlyphOutline() const Q_DECL_OVERRIDE;
+
     int getGlyphIndexes(const QChar *ch, int numChars, QGlyphLayout *glyphs) const;
     void getCMap();
 
@@ -136,6 +138,8 @@ private:
                                       QImage::Format mask_format);
     bool hasCFFTable() const;
     bool hasCMapTable() const;
+    bool hasGlyfTable() const;
+    bool hasEbdtTable() const;
 
     const QSharedPointer<QWindowsFontEngineData> m_fontEngineData;
 
@@ -146,6 +150,7 @@ private:
     uint        stockFont  : 1;
     uint        ttf        : 1;
     uint        hasOutline : 1;
+    uint        hasUnreliableOutline : 1;
     uint        cffTable   : 1;
     TEXTMETRIC  tm;
     int         lw;