http://bugs.winehq.org/show_bug.cgi?id=11203
--- Comment #31 from Ian Goddard igoddard@nildram.co.uk 2009-08-14 18:42:08 --- (In reply to comment #30)
The thing is, you can't use 32 bpp pixmaps etc on X11. Its all 24 bit, there's also no alpha except in very few situations(that's partially why we need a DIB engine)
If there's any attempt to create a 32 bit X object we probably have to request a 24 bit one instead. Or that's how I understand it at least.
In that case there seems to be no value in retaining the code which rewrites the depth.