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https://bugs.freedesktop.org/show_bug.cgi?id=4707
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
------- Additional Comments From [EMAIL PROTECTED] 2006-10-14 17:24 -------
(In reply to comment #5)
> At a certain level, if the app requests this state, its' fair enough that it
> pays for computing the values. Unless you find a real instance where this is
> a
> problem - ie an app that asks for this state and then doesn't render points
> *and* becomes noticably slower as a result, I would consider it not worth
> optimizing for.
Fair enough. The theoretical maximum performance hit would probably be 25%
(which is the vertex size increase caused by submitting point size since the
minimum otherwise is 3 floats for position and 1 float (4UB) for color0, I'd
think the point size calculation itself shouldn't be that expensive), though I'd
think in practice it should well stay below that.
And the additional tests needed in tcl mode for ARB_point_sprite (to disable
perspective correction) didn't seem to have a visible performance impact
neither, though I wondered if it's the reason ati does not support that
extension on r200 with any of its drivers (even those for other operating
systems).
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