Support OpenVG graphics systems that inherit from QVGPixmapData

Custom graphics systems, may want to inherit from QVGPixmapData to
implement alternative pixmap management strategies.  We make toVGImage()
overridable and the data members protected to support this.

Reviewed-by: Sarah Smith

1 files changed, 3 insertions, 3 deletions

diff --git a/src/openvg/qpixmapdata_vg_p.h b/src/openvg/qpixmapdata_vg_p.h
index f552c7b..f6fac88 100644
--- a/src/openvg/qpixmapdata_vg_p.h
+++ b/src/openvg/qpixmapdata_vg_p.h
@@ -89,10 +89,10 @@ public:
 
     // Return the VGImage form of this pixmap, creating it if necessary.
     // This assumes that there is a VG context current.
-    VGImage toVGImage();
+    virtual VGImage toVGImage();
 
     // Return the VGImage form for a specific opacity setting.
-    VGImage toVGImage(qreal opacity);
+    virtual VGImage toVGImage(qreal opacity);
 
     QSize size() const { return QSize(w, h); }
 
@@ -108,7 +108,7 @@ protected:
     void cleanup();
 #endif
 
-private:
+protected:
     VGImage vgImage;
     VGImage vgImageOpacity;
     qreal cachedOpacity;