http://bugs.winehq.org/show_bug.cgi?id=1973
------- Additional Comments From willie@froq.net 2004-04-12 11:16 ------- One more info (from Sebastien Miglio of TVPaint, the Mirage devs) - hope this may help:
"The problem come from the 32bits Pixels blit functions in Wine. Mirage use the MS Windows function StretchDIBits() with pixel biBitCount=32."