[Bug 2377] Polygon stipple broken.

[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #2 from Alex Deucher <agd5f@yahoo.com> ---
Is this still an issues with KMS and mesa from git?

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #3 from smoki <smoki00790@gmail.com> ---
Created attachment 72860
  --> https://bugs.freedesktop.org/attachment.cgi?id=72860&action=edit
r200

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #4 from smoki <smoki00790@gmail.com> ---
Created attachment 72861
  --> https://bugs.freedesktop.org/attachment.cgi?id=72861&action=edit
swrast


 Curent mesa git master - still render diferently.

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #5 from smoki <smoki00790@gmail.com> ---
Comment on attachment 72860
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r200

 oh no wrong image, sorry :)

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #6 from smoki <smoki00790@gmail.com> ---
Created attachment 72862
  --> https://bugs.freedesktop.org/attachment.cgi?id=72862&action=edit
r200 render

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #7 from Roland Scheidegger <sroland@vmware.com> ---
Looks to me like the offsets for the stipple pattern are wrong.
These are set in r200UpdateViewportOffset - which has no callers. I noted this
in bug 57842, and tried to address it there though the patch probably wasn't
really right in any case, but you could try that as a starting point.
(I'm not sure though if actually we don't also need to take viewport into
account for the offsets? Maybe not though. I'm pretty sure though stippling
also additionally would be broken for fbo's (but certainly should go unnoticed
by this test), as the code does as the comment says, always invert the
stippling pattern, and the y offset is also always calculated taking the window
height into account, and I strongly suspect both aren't right for fbos.)

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #8 from smoki <smoki00790@gmail.com> ---

 I was tested your patch from bug 57842 when you posted it there, but as i
remember many random mesa demos i tried started to segfault with it.

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[Bug 2377] Polygon stipple broken.

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https://bugs.freedesktop.org/show_bug.cgi?id=2377

--- Comment #9 from smoki <smoki00790@gmail.com> ---
Created attachment 73194
  --> https://bugs.freedesktop.org/attachment.cgi?id=73194&action=edit
ums and mesa 7.5.2 r200 render

 But overal, it is not quite correct but polys renders better now then it was
with UMS.

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