* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
pavol@klacansky.com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pavol@klacansky.com
Version|unspecified |git
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
AFAICT the hardware doesn't provide any way to retrieve the primitive ID
without a geometry shader, so we'd probably need to use a passthrough geometry
shader for this. Any volunteers?
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
--- Comment #2 from pavol@klacansky.com ---
Alright, I can create 3 geometry shaders for all primitives, but I am not sure
if that is the right way for mesa. Thanks
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
Just to be clear, I'm talking about doing this transparently in the driver, not
in the application.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
pavol@klacansky.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|medium |highest
--- Comment #4 from pavol@klacansky.com ---
I do not have radeonsi supported device. How does Intel driver support this? I
think this is really useful for picking algorithm.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
--- Comment #5 from Ian Romanick <idr@freedesktop.org> ---
(In reply to pavol from comment #4)
> I do not have radeonsi supported device. How does Intel driver support this?
> I think this is really useful for picking algorithm.
The piglit test tests/spec/glsl-1.50/execution/primitive-id-no-gs.shader_test
is for this very case. That test passes at least on my Ivybridge. I don't
know what we do in the driver to make this work... or if the hardware just
sorts it out.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
--- Comment #6 from Marek Olšák <maraeo@gmail.com> ---
The hw GS mode A should be able to do this, which is basically a VS which gets
PrimitiveID on the input.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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--- Comment #7 from Dave Airlie <airlied@freedesktop.org> ---
FYI I've posted patches to mesa-dev to address this for evergreen and later.
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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--- Comment #8 from Dave Airlie <airlied@freedesktop.org> ---
fix for this pushed to mesa master
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^ permalink raw reply [flat|nested] 11+ messages in thread* [Bug 78951] gl_PrimitiveID is zero if no geometry shader is present
2014-05-20 8:15 [Bug 78951] New: gl_PrimitiveID is zero if no geometry shader is present bugzilla-daemon
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https://bugs.freedesktop.org/show_bug.cgi?id=78951
pavol@klacansky.com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #9 from pavol@klacansky.com ---
Thank you, it works great.
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