[Marble-devel] Supporting transparent overlays

[Knut Schleßelmann]

Hi there,

right now I try to show some PNG files with transparent background on a 
MarbleWidget using GeoDataGroundOverlay.

Sadly it looks like marble discard the alpha channel at some place (IMHO it 
could be in ImageF.cpp) and displays the background in black. That's not quite 
satisfactory since I'd like to simply add some visual information to the OSM 
theme.

Is it possible to fix this or can I use some other feature to display an 
overlay with transparent background?

regards


Knut