[Bug 12194] Some DDraw games flicker the screen

http://bugs.winehq.org/show_bug.cgi?id=12194

--- Comment #9 from Alexander Dorofeyev   2008-05-12 17:43:06 ---
Created an attachment (id=12985)
 --> (http://bugs.winehq.org/attachment.cgi?id=12985)
proposed fix

Ok i think i found the problem. I believe RealizePalette was sometimes wrongly
copying back buffer surface to screen. The check must probably be replaced with
== ddraw_primary as in e.g. UnlockRect. That fixes gamma options flicker for me
(and  that's the only flicker i saw).

Please test this fix and let me know if it fixes all issues.