[Mesa-dev] [Bug 93813] Incorrect viewport range when GL_CLIP_ORIGIN is GL_UPPER_LEFT

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93813

--- Comment #9 from Mathias Fröhlich <Mathias.Froehlich at web.de> ---
Brian,

I had the same experience with the nvidia driver back when I wrote the test
some time ago.
But if I recall correctly, then the nvidia driver does agree with the test in
any of these tested state combinations. But the piglit test wildly switches
between the state combinations in between draws which probably exposes an
internal update problem in the blob.
May be you will prove me wrong, but keep that in mind. I believe in the end I
could get the expected from the binary blob by only changing clip control at
the beginning of a new frame or something similar.

Greetings

Mathias

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