VGImage readback support in QPixmap on OpenVG.

Enable readback of pixel data for pixmaps that are constructed directly
from a VGImage. These do not have any backing data in main memory
(i.e. 'source' is null), however certain operations, like toImage(),
fill(), or painting into the pixmap do not work without it. With this
patch the data is read back via vgGetImageSubData when needed.

Task-number: QT-4669
Reviewed-by: Jani Hautakangas

1 files changed, 1 insertions, 1 deletions

diff --git a/src/openvg/qvg_symbian.cpp b/src/openvg/qvg_symbian.cpp
index 22cbb3c..c6521fd 100644
--- a/src/openvg/qvg_symbian.cpp
+++ b/src/openvg/qvg_symbian.cpp
@@ -127,7 +127,7 @@ void QVGPixmapData::fromNativeType(void* pixmap, NativeType type)
         }
 
         is_null = (w <= 0 || h <= 0);
-        source = QVolatileImage(); // vgGetImageSubData() some day?
+        source = QVolatileImage(); // readback will be done later, only when needed
         recreate = false;
         prevSize = QSize(w, h);
         updateSerial();