Well, I managed to introduce Jesse Allen's dib engine in current wine tree, and it worked. It has many stubbed functions, but I could load and run Autocad with it, which IMHO is a good result. Autocad misses many toolbar's icons but, about the problem of very slow TT fonts, the performance increased noticeably; pannin a drawing with TT fonts wend from a frame each 2-5 seconds to a frame each 0.2 seconds about.
Now, before trying to extend it, I'd like to know if, introducing a way to enable/disable it by environ var OR registry entry it could enter current devel tree. Ciao Max