https://bugs.freedesktop.org/show_bug.cgi?id=37652
Summary: [r300g] No texture shadow in ogre3d Product: Mesa Version: git Platform: x86-64 (AMD64) OS/Version: Linux (All) Status: NEW Severity: normal Priority: medium Component: Drivers/Gallium/r300 AssignedTo: dri-devel@lists.freedesktop.org ReportedBy: sh@lutzhaase.com
Using r300g, I'm unable to get texture shadows using the ogre3d graphics engine. Mesa texture shadow demos work fine. In fact, in the ogre3d texture shadow showcase demo I can see a very distorted texture shadow on the side of the base plane. In my own scenes, I get no shadows at all. Stencil shadows work just fine.
In order to pin down the problem, I ran a few tests. As it turns out, the problem really only exists in r300g (as far as I could test). It works fine in r600g and gallium3d llvmpipe. For reference, it also works in the NVIDIA and AMD proprietary drivers.
I also reported the problem in the ogre3d forums (http://www.ogre3d.org/forums/viewtopic.php?f=4&t=64781) but it appears to be the wrong audience to post this issue in.
Due to the abstract nature of ogre3d, it is hard for me to create a minimal case without ogre3d.
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #1 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-26 22:55:05 PDT --- Created an attachment (id=47204) --> (https://bugs.freedesktop.org/attachment.cgi?id=47204) r300g glxinfo
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #2 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-26 22:56:03 PDT --- Created an attachment (id=47205) --> (https://bugs.freedesktop.org/attachment.cgi?id=47205) r300g ogrelog
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #3 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-26 22:58:18 PDT --- Created an attachment (id=47206) --> (https://bugs.freedesktop.org/attachment.cgi?id=47206) llvmpipe glxinfo
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #4 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-26 22:58:35 PDT --- Created an attachment (id=47207) --> (https://bugs.freedesktop.org/attachment.cgi?id=47207) llvmpipe ogrelog
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #5 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-26 23:05:34 PDT --- The warnings about libtxc_dxtn.so might be irritating so I installed the required library but to no avail. After all, it would be fairly strange if ogre's texture shadows used S3TC compression in memory.
Further info: My distro is Arch Linux x86_64. The card is a Mobility Radeon X2100. The logs were taken from a very recent git revision. It is not a regression of r300g as I can't remember ever having texture shadows with this driver. They did work back then with r300c, though.
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #6 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-27 07:10:38 PDT --- For those without ogre3d, here is an apitrace: http://ompldr.org/vOHRlOQ
The character should show a shadow on the ground. It currently doesn't on r300g.
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #7 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-28 03:01:26 PDT --- A further, smaller, more conclusive trace in a less complex scene: http://ompldr.org/vOHRyMQ
The planet is supposed to cast a shadow towards the camera.
Retrace call 19396 and notice how the shadow texture in texture 0 exist but at the glDrawElements isn't actually drawn to the framebuffer.
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #8 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-28 03:55:22 PDT --- Basically the same trace as before, but now all additional (and unused) ogre3d default materials as well as all scene materials were disabled. This removes some error and call noise during frame 1 and cuts down the size a lot.
Also I made the shadow green and the light white so it would be easier to see.
One call of interest is at 13429.
https://bugs.freedesktop.org/show_bug.cgi?id=37652
--- Comment #9 from Sven-Hendrik Haase sh@lutzhaase.com 2011-05-28 03:56:23 PDT --- Created an attachment (id=47249) --> (https://bugs.freedesktop.org/attachment.cgi?id=47249) trace ogre3d scene with texture shadow
https://bugs.freedesktop.org/show_bug.cgi?id=37652
Marek Olšák maraeo@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED
--- Comment #10 from Marek Olšák maraeo@gmail.com 2011-06-13 08:21:24 PDT --- Fixed by some of my latest r300g commits (not sure which one because I was fixing other bugs) and the fix appears to be cherry-picked to 7.10 as well. Closing.
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