1 files changed, 5 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/platform/graphics/qt/ImageQt.cpp b/src/3rdparty/webkit/WebCore/platform/graphics/qt/ImageQt.cpp
index be7d1e0376..e266c07fc7 100644
--- a/src/3rdparty/webkit/WebCore/platform/graphics/qt/ImageQt.cpp
+++ b/src/3rdparty/webkit/WebCore/platform/graphics/qt/ImageQt.cpp
@@ -109,6 +109,8 @@ void Image::drawPattern(GraphicsContext* ctxt, const FloatRect& tileRect, const
     ctxt->save();
     ctxt->setCompositeOperation(op);
     QPainter* p = ctxt->platformContext();
+    if (!pixmap.hasAlpha() && p->compositionMode() == QPainter::CompositionMode_SourceOver)
+        p->setCompositionMode(QPainter::CompositionMode_Source);
     p->setBrushOrigin(phase);
     p->fillRect(destRect, b);
     ctxt->restore();
@@ -146,6 +148,9 @@ void BitmapImage::draw(GraphicsContext* ctxt, const FloatRect& dst,
 
     QPainter* painter(ctxt->platformContext());
 
+    if (!image->hasAlpha() && painter->compositionMode() == QPainter::CompositionMode_SourceOver)
+        painter->setCompositionMode(QPainter::CompositionMode_Source);
+
     // Test using example site at
     // http://www.meyerweb.com/eric/css/edge/complexspiral/demo.html    
     painter->drawPixmap(dst, *image, src);