[Bug 702] Radeon only supports a maximum point size of 1.0.

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Nov 10 16:09:34 PST 2010


--- Comment #16 from Roland Scheidegger <sroland at vmware.com> 2010-11-10 16:09:34 PST ---
(In reply to comment #14)
> Many thanks for getting that in! I'll give the new code a try once the PPA is
> updated.
> So r100, at the hardware level, doesn't support point sizes larger than 1.0.
> "Fixing" this bug, then, would require implementing a software emulation of
> point sprites (as was suggested in the original circa-2003 bug discussion). I
> suppose this might be worthwhile if it were a cross-driver facility, such that
> it would benefit any hardware that lacks large-point powers.
Yes, this is (easily) possible in gallium. But r100 can't really be ported to
gallium even if you wanted... So all you can do easily is drop to swrast, which
isn't terribly useful, so we just rely on apps wanting to use large points to
convert them to tris themselves. Seems fair enough, apps shouldn't expect large
point size support (well not on this old hardware at least...), the driver
reports this correctly for r100.

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