[Haskell-beginners] bitmap image with transparent background

Hi :-) I have just joined and I don't know if this is a beginner question, anyway I have been given an Haskell code which uses images, but when I convert a tiff with transparent background into a bitmap, their background becomes white and I need it to be transparent. Is there a way in Haskel to convert a bitmap with solid background into a bitmap with transparent background? Is there another format that can be used instead of bitmap in Haskell? Best, Letizia -- Letizia Galli 0039 328 6917393 www.letiziagalli.it