https://bugs.freedesktop.org/show_bug.cgi?id=64879
Priority: medium Bug ID: 64879 CC: idr@freedesktop.org Assignee: dri-devel@lists.freedesktop.org Summary: i915 doesn't do derivatives, neither gallium nor intel driver Severity: normal Classification: Unclassified OS: All Reporter: fjhmesabug@gmail.com Hardware: Other Status: NEW Version: git Component: Drivers/Gallium/i915g Product: Mesa
Any way to support dFdx() on i915?
https://bugs.freedesktop.org/show_bug.cgi?id=64879
Eric Anholt eric@anholt.net changed:
What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution|--- |WONTFIX
--- Comment #1 from Eric Anholt eric@anholt.net --- Other than the sw fallback, no.
https://bugs.freedesktop.org/show_bug.cgi?id=64879
--- Comment #2 from fjhenigman fjhmesabug@gmail.com --- The software rendering fallback in the intel driver is pretty slick. The gallium driver has nothing like that, correct?
https://bugs.freedesktop.org/show_bug.cgi?id=64879
--- Comment #3 from Roland Scheidegger sroland@vmware.com --- (In reply to comment #2)
The software rendering fallback in the intel driver is pretty slick. The gallium driver has nothing like that, correct?
Nope. Not sure though what you mean by pretty slick, in my experience it is usually useless due to glacial performance (though I guess maybe it's better thanks to UMA compared to old radeons).
https://bugs.freedesktop.org/show_bug.cgi?id=64879
--- Comment #4 from Marek Olšák maraeo@gmail.com --- FYI, the old failover module was actually capable of switching between a hardware driver and softpipe in the middle of rendering. It should be possible to implement something similar for i915g, though it might be a lot of work.
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