http://bugs.winehq.org/show_bug.cgi?id=5776
--- Comment #27 from Henri Verbeet hverbeet@gmail.com 2010-10-15 13:15:04 CDT --- (In reply to comment #26)
A workaround was posted to http://bugs2.winehq.org/attachment.cgi?id=6623 (not sure if it still applies) - see #6. So I think the problem is well known and not fixed. You could read the comment, it describes the problem very well.
I doubt that workaround still applies. Either way, the proper way to do this is ARB_sampler_objects.