array __decode()
Decodes an ILBM image structure down to chunks and
({int xsize,int ysize, // 0: size of image drawing area string bitmapheader, // 2: BMHD chunk void|string colortable, // 3: opt. colortable chunk (CMAP) void|string colortable, // 4: opt. colormode chunk (CAMG) string body, // 5: BODY chunk mapping more_chunks}) // 6: mapping with other chunks
the above array
May throw errors if the ILBM header is incomplete or illegal.