If we are going to copy raw data from src to dest we need to make sure both...

If we are going to copy raw data from src to dest we need to make sure both are in the same image format

Thanks to Adrià Arrufat for the testing

BUGS: 243434

svn path=/trunk/KDE/kdegraphics/okular/; revision=1225247

ui/pagepainter.cpp

@@ -738,7 +738,7 @@ void PagePainter::scalePixmapOnImage ( QImage & dest, const QPixmap * src,
     unsigned int * destData = (unsigned int *)dest.bits();
 
     // source image (1:1 conversion from pixmap)
-    QImage srcImage = src->toImage();
+    QImage srcImage = src->toImage().convertToFormat(format);
     unsigned int * srcData = (unsigned int *)srcImage.bits();
 
     // precalc the x correspondancy conversion in a lookup table