[Bug 30152] [r300g] kwin blur effect is not working

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30152

Fredrik Höglund <fredrik at kde.org> changed:

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                 CC|                            |fredrik at kde.org

--- Comment #5 from Fredrik Höglund <fredrik at kde.org> 2010-09-13 18:08:43 PDT ---
(In reply to comment #1)
> There are lots of varyings. Just a guess - aren't there more vertex shader
> outputs than we can rasterize? We are currently limited to 8 generics.

KWin generates the source code for the blur shaders at runtime and should limit
the number of varyings to GL_MAX_VARYING_FLOATS / 4.

So I don't think this is the explanation for why it's not working in KWin
(although the piglit test I submitted obviously uses too many).

Anyway I'll submit another testcase that uses 8 varyings.

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