Difficult situation

Finally I (at least once) got it. Painted on a TBitmap.Canvas then saved it to file, but there is a big problem with it. It only works on newer AROS, so ABIv0-ot. At my old AROS development installation it always crash. Seems the cybergraphics.library is very buggy ReadPixelArray and WritePixelArray crash. So If I continue this way it will only run on newer AROS, on old it will just crash.
The versionsnumbers differ a lot (41.2 <> 51.2) so, maybe I could make a block for this functions if the version number is lower then 51.