Make it possible to implement engine-specific drop shadow filters

It wasn't possible for the paint engine to override the drop
shadow filter because QPixmapDropShadowFilter::draw() was not
asking for an engine-specific filter object.

Also, change the OpenVG filter to use vgGaussianBlur() instead of
vgConvolve(), and draw the original image on top of the shadow.

Task-number: QTBUG-4583
Reviewed-by: trustme

1 files changed, 0 insertions, 3 deletions

diff --git a/src/openvg/qpixmapfilter_vg_p.h b/src/openvg/qpixmapfilter_vg_p.h
index 8bd4f7e..58111ec 100644
--- a/src/openvg/qpixmapfilter_vg_p.h
+++ b/src/openvg/qpixmapfilter_vg_p.h
@@ -98,10 +98,7 @@ public:
 private:
     mutable VGfloat matrix[5][4];
     mutable QColor prevColor;
-    mutable qreal prevRadius;
-    mutable int kernelSize;
     mutable bool firstTime;
-    mutable QVarLengthArray<VGshort, 16> kernel;
 };
 
 class Q_OPENVG_EXPORT QVGPixmapBlurFilter : public QPixmapBlurFilter