Comment # 1
on bug 57842
from Roland Scheidegger
Hmm this is odd I can't see anything wrong with the culling setup wrt fbos. The viewport, window handling though seems somewhat bogus. First, r200UpdateViewportOffset() has no callers (it is used in radeon->vtbl.update_viewport_offset but that one seems to have no callers neither). This function would not take the y flip into account but since it isn't used... I'd just get rid of it but it's the only thing handling stippling that probably needs to move somewhere else. Also, both r200UpdateViewportOffset() and r200UpdateWindow() use the driDrawable height for the yoffset in the viewport. I don't think that will work for fbos, should just use the ctx->DrawBuffer height instead? I can't see though why that would just cause failures with culling.
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