2 files changed, 7 insertions, 2 deletions
diff --git a/src/gui/painting/qpaintengine_mac.cpp b/src/gui/painting/qpaintengine_mac.cpp
index 14ba94e..e5323d8 100644
--- a/src/gui/painting/qpaintengine_mac.cpp
+++ b/src/gui/painting/qpaintengine_mac.cpp
@@ -1390,7 +1390,11 @@ QCoreGraphicsPaintEngine::updateRenderHints(QPainter::RenderHints hints)
         CGContextSetInterpolationQuality(d->hd, (hints & QPainter::SmoothPixmapTransform) ?
                                          kCGInterpolationHigh : kCGInterpolationNone);
     }
-    CGContextSetShouldSmoothFonts(d->hd, hints & QPainter::TextAntialiasing);
+    bool textAntialiasing = (hints & QPainter::TextAntialiasing) == QPainter::TextAntialiasing;
+    if (!textAntialiasing || d->disabledSmoothFonts) {
+        d->disabledSmoothFonts = !textAntialiasing;
+        CGContextSetShouldSmoothFonts(d->hd, textAntialiasing);
+    }
 }
 
 /*
diff --git a/src/gui/painting/qpaintengine_mac_p.h b/src/gui/painting/qpaintengine_mac_p.h
index c9ab419..940b2bc 100644
--- a/src/gui/painting/qpaintengine_mac_p.h
+++ b/src/gui/painting/qpaintengine_mac_p.h
@@ -148,7 +148,7 @@ class QCoreGraphicsPaintEnginePrivate : public QPaintEnginePrivate
     Q_DECLARE_PUBLIC(QCoreGraphicsPaintEngine)
 public:
     QCoreGraphicsPaintEnginePrivate()
-        : hd(0), shading(0), stackCount(0), complexXForm(false)
+        : hd(0), shading(0), stackCount(0), complexXForm(false), disabledSmoothFonts(false)
     {
     }
 
@@ -168,6 +168,7 @@ public:
     CGShadingRef shading;
     int stackCount;
     bool complexXForm;
+    bool disabledSmoothFonts;
     enum { CosmeticNone, CosmeticTransformPath, CosmeticSetPenWidth } cosmeticPen;
 
     // pixel and cosmetic pen size in user coordinates.