From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 95085] Invalid sampling of second texture in fragment shader that have two samplers with different parameters.
Date: Fri, 29 Apr 2016 23:27:02 +0000 [thread overview]
Message-ID: <bug-95085-502-FqmNywYAB3@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-95085-502@http.bugs.freedesktop.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=95085
--- Comment #14 from Nicolai Hähnle <nhaehnle@gmail.com> ---
I think I understand now where the bug is coming from, and I'm not sure if it's
a driver or an application bug :)
The trace uses glVertexAttribPointer instead of glVertexAttribIPointer to set
up a vertex element that will consumed by an uint GLSL variable. I kind of
suspect that that should be undefined behaviour, but I haven't found a
corresponding spec reference.
In any case, it looks like this causes different parts of the driver and the
various auxiliary tools to disagree about whether the element should be treated
as an int or as a float, and some conversion happens somewhere that makes it
all go wrong...
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next prev parent reply other threads:[~2016-04-29 23:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-95085-502@http.bugs.freedesktop.org/>
2016-04-25 14:35 ` [Bug 95085] Invalid sampling of second texture in fragment shader that have two samplers with different parameters bugzilla-daemon
2016-04-29 18:55 ` bugzilla-daemon
2016-04-29 21:07 ` bugzilla-daemon
2016-04-29 23:27 ` bugzilla-daemon [this message]
2016-04-30 1:11 ` bugzilla-daemon
2016-04-30 1:20 ` bugzilla-daemon
2016-04-30 18:51 ` bugzilla-daemon
2016-05-01 17:32 ` bugzilla-daemon
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