[Bug 18314] The Witcher: Launcher window invisible (taskbar enty appears)

http://bugs.winehq.org/show_bug.cgi?id=18314

--- Comment #2 from Jan-Peter Nilsson   2009-05-03 03:28:06 ---
Internally IPicture seems to be aware of at least one bit alpha (hbmMask). 
I realize this is not enough for all cases but it seems to be sufficient in
this case.

A small modification to OLEPictureImpl_LoadPNG to get it to create the mask and
then using it from GdipBitmapLockBits to populate the alpha channel was enough
to get the launcher window to appear.

I can't see any proper way to get get hold of the mask from outside of the
IPicture implementation though.