[Bug 5247] Star Wars Battlefront sky box drawn upside down

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=5247

------- Additional Comments From [e-mail]  2006-16-09 22:03 -------
This bug is more complicated that it first seems.

Part of the problem is that if pbuffers are disabled or not supported, rendering
will occur onscreen, but the end result will then still be written into a
texture (via glCopyTexImage), necessitating the flip. That's because EndScene()
does not do a check for whether pbuffers are used [ why is this code in EndScene
in the first place? ]. How render-to-texture should be done if offscreen
rendering isn't supported is an interesting question.

Then there's the issue that the projection matrix is being modified based on
renderUpsideDown() - even when a vertex shader is used, which overrides the
projection matrix - makes no sense to me.

In short, it's all a very ugly mess, that I had no intention of fixing or
changing at this point - just wanted to reorganize the code. However, will keep
this in mind and maybe do something about it in the future. This will also
affect my FBO patch and other cleanups.

Ivan