http://bugs.winehq.org/show_bug.cgi?id=9672
--- Comment #26 from Robert Wm Ruedisueli ruediix@gmail.com 2011-05-30 05:23:55 CDT --- This is just a shot in the dark, but could the format "0" be some sort of autodetect.
This would explain a lot. It would be worth someone with more knowledge in the area to write a test case for. Simply a routine that creates Shaders with pixelformat 0 and feeds it various known types and see what types display, and which ones don't. Then, we can match the behavior.