Patch to mouse accel code
Jim Gettys
Jim.Gettys at hp.com
Thu Nov 11 13:03:53 PST 2004
On Thu, 2004-11-11 at 15:18 -0500, Keith Packard wrote:
> Around 14 o'clock on Nov 11, Jim Gettys wrote:
>
> > It would be better if the algorithm was coded to avoid floating point,
> > if it isn't too hard.
>
> This isn't a performance problem; at 100Hz, any system should be able to
> execute a few software FP ops.
Yes, I don't think it is a huge deal. Actually, integer/fp conversions
are often much slower than just a simple FP operation.
> As the existing X server arc and line
> drawing code requires FP, I don't see a problem with having the mouse code
> use it as well.
The X arc code that no applications use....
>
> That said, code which can easily avoid FP is always nicer.
>
Yup. Exactly.
If we can't find equivalent integer code that is simple to understand,
I'm cool with doing it in FP... Simple, understandable code is worth
a lot.
- Jim
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