* [Bug 30152] [r300g] kwin blur effect is not working
2010-09-13 2:21 [Bug 30152] New: [r300g] kwin blur effect is not working bugzilla-daemon
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--- Comment #1 from Marek Olšák <maraeo@gmail.com> 2010-09-13 00:40:31 PDT ---
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.
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--- Comment #2 from Marek Olšák <maraeo@gmail.com> 2010-09-13 00:45:14 PDT ---
RADEON_DEBUG=rs shows 7 generics written to FS, I guess that's the problem.
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--- Comment #3 from Marek Olšák <maraeo@gmail.com> 2010-09-13 00:57:34 PDT ---
r300: Rasterized generic 0 unused.
r300: Rasterized generic 10 written to FS.
r300: Rasterized generic 11 written to FS.
r300: Rasterized generic 12 written to FS.
r300: Rasterized generic 13 written to FS.
r300: Rasterized generic 14 written to FS.
r300: Rasterized generic 15 written to FS.
r300: Rasterized generic 16 written to FS.
r300: FS input generic 17 unassigned.
r300: FS input generic 18 unassigned.
r300: FS input generic 19 unassigned.
r300: FS input generic 20 unassigned.
r300: FS input generic 21 unassigned.
r300: FS input generic 22 unassigned.
r300: --- Rasterizer status ---: colors: 0, generics: 8.
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--- Comment #4 from davide <marsicanbear@gmail.com> 2010-09-13 17:28:16 PDT ---
As you know, I have an r300 video card and I am using git mesa, so if you need
any testing, just let me know..
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Fredrik Höglund <fredrik@kde.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |fredrik@kde.org
--- Comment #5 from Fredrik Höglund <fredrik@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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--- Comment #6 from davide <marsicanbear@gmail.com> 2010-09-26 19:15:29 PDT ---
Any news on this?
Blur is still broken in kwin-4.5.1 on my mobility x700 using r300g from the
latest mesa git..
(In reply to comment #5)
> (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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--- Comment #7 from Fredrik Höglund <fredrik@kde.org> 2010-09-27 18:04:07 PDT ---
I've pushed another piglit test that uses 7 varyings to:
http://cgit.freedesktop.org/~fredrik/piglit
While I was looking at the code for the vertex shader I also realized that it
was setting gl_TexCoord[0] even though the fragment shader wasn't using it.
I've fixed that in kwin and updated the code in the original piglit test to
reflect that change.
The number of varyings used is always an odd number, so even with
gl_texCoord[0] being set the available outputs shouldn't have been exceeded
though.
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--- Comment #8 from Marek Olšák <maraeo@gmail.com> 2010-09-27 18:34:47 PDT ---
Actually, all vertex shader outputs are sent to the rasterizer in r300g and
therefore they occupy texcoord slots. We cannot disable unused outputs via some
hardware state, but I guess we could recompile the vertex shader based on what
inputs are read by the fragment shader.
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--- Comment #9 from Clément <dieppe@yopmail.com> 2010-11-17 07:21:47 PST ---
Hi,
I did a git bisect (only on src/gallium, I have some problem doing it for the
whole mesa since it doesn't compile :
radeong_dri.so.tmp: undefined reference to `operator delete[](void*)'
radeong_dri.so.tmp: undefined reference to `operator delete(void*)'
radeong_dri.so.tmp: undefined reference to `operator new[](unsigned long)'
radeong_dri.so.tmp: undefined reference to `__cxa_pure_virtual'
radeong_dri.so.tmp: undefined reference to `__gxx_personality_v0'
radeong_dri.so.tmp: undefined reference to `vtable for
__cxxabiv1::__vmi_class_type_info'
radeong_dri.so.tmp: undefined reference to `vtable for
__cxxabiv1::__class_type_info'
radeong_dri.so.tmp: undefined reference to `vtable for
__cxxabiv1::__si_class_type_info'
(ca088cc277ce9f986693c857f3961dc0e1a4d91c and previous)).
Anyway, here is the partial result:
4f51762b070854901b48e461b76f614da414868d is the first bad commit
commit 4f51762b070854901b48e461b76f614da414868d
Author: Jakob Bornecrantz <jakob@vmware.com>
Date: Thu Aug 12 13:51:39 2010 +0100
gallium: Link DRI drivers with g++ and test with CXX
New shader compiler need libc++ runtime. This works already if
we are using llvm so this just covers the !llvm case.
:040000 040000 bb2d7003cbdb5dc4aa8b173d1137c2461e255d76
e6558a2a178ab07006ab69cb9326278de84b817c M src
[clement@euryphaessa mesa]$ git bisect log
# bad: [09547e1bcee7df3444dd8682770d1b31da1a5822] r600g : add basic loop
support.
# good: [1cb92fb92e69b5b138293398a98665c2a3c63a5b] translate_generic: factor
out common code between linear and indexed
# good: [e01a49af61a4d56800b1ad672959ba7a88c1da1e] r300g: Remove unnecessary
header.
git bisect start '09547e1bcee7df3444dd8682770d1b31da1a5822'
'1cb92fb92e69b5b138293398a98665c2a3c63a5b'
'e01a49af61a4d56800b1ad672959ba7a88c1da1e' '--' 'src/gallium/'
# bad: [d843bbfd3f92d5afea665c3ff16bcca0628f2e7b] r600g: fix DB decompression
git bisect bad d843bbfd3f92d5afea665c3ff16bcca0628f2e7b
# bad: [bed9dff9d94e33d34340183d7cb633869dcb4f90] u_debug_describe: use switch
instead of if chain
git bisect bad bed9dff9d94e33d34340183d7cb633869dcb4f90
# bad: [076c53879b90855ecf38602584f22e4ab6db7569] r600g: update comments about
ALU src operands
git bisect bad 076c53879b90855ecf38602584f22e4ab6db7569
# bad: [1c2a44e445fa4d3bd6f95d9c63041c222268724a] r300g: fix context destroy
under hyperz
git bisect bad 1c2a44e445fa4d3bd6f95d9c63041c222268724a
# good: [ecec6df9cfe74dbd16f072bc4bbcd90374f8d2c8] r300g: fix assert in the
rasterizer block for r3xx-r4xx
git bisect good ecec6df9cfe74dbd16f072bc4bbcd90374f8d2c8
# bad: [1d22923fae7f4c749b3820844110e3d8ee4d26c0] scons: Link talloc.
git bisect bad 1d22923fae7f4c749b3820844110e3d8ee4d26c0
# bad: [3a3cdb909da5b02edf921fcb5a009dfc2868d23d] scons: Build the new glsl2
code.
git bisect bad 3a3cdb909da5b02edf921fcb5a009dfc2868d23d
# bad: [4f51762b070854901b48e461b76f614da414868d] gallium: Link DRI drivers
with g++ and test with CXX
git bisect bad 4f51762b070854901b48e461b76f614da414868d
Also, I noticed that the blur effect never worked perfectly: it works if you
put the strength of the effect <= the average strength (you can choose the
strength of the effect in systemsettings, the more it is set, the more it's
blured (yeah, really, crazy huh?)). Otherwise, you see artifacts. Dunno why
though, but just thought it might be a pointer.
Ah, and last thing, I run kde 4.5.75.
Voilà, if you need anything else, don't hesitate, I'd really like to have the
blur effect working, it's way more beautiful.
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--- Comment #10 from Marek Olšák <maraeo@gmail.com> 2010-12-14 11:06:46 PST ---
Is this still an issue with current Mesa git?
The blur effect works for me with kwin 4.5.1 on R5xx.
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--- Comment #11 from Clément <dieppe@yopmail.com> 2010-12-14 12:44:04 PST ---
Works with KDE 4.5.85 and a x1400 mobility (so also a r5XX afaik). Thanks a lot
:)
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--- Comment #12 from Marek Olšák <maraeo@gmail.com> 2010-12-14 23:48:46 PST ---
Fredrik, I have pushed your kwin tests update to piglit now (sorry I overlooked
it).
Clément, thanks for the feedback. I consider this issue closed as far as r5xx
chipsets are concerned.
davide, does the blur effect work for you with the latest mesa master branch on
your ATI X700?
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From: bugzilla-daemon @ 2010-12-17 12:25 UTC (permalink / raw)
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Marek Olšák <maraeo@gmail.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
--- Comment #13 from Marek Olšák <maraeo@gmail.com> 2010-12-17 04:25:34 PST ---
So far there's no feedback from davide and nobody else appears to have any
issue with the blur, so I am closing the bug. Please re-open this bug (or
better: file a new one) if it doesn't work on r3xx-r4xx.
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