On Wed, Feb 02, 2005 at 11:58:05PM +0100, Peter Osterlund wrote:
> In practice I don't think it will make any significant difference. What
> the code should do depends on what you want to happen if you move the
> mouse pointer 1/2 pixel with one finger stroke, then move it another 1/2
> pixel with a second stroke. The patch I posted will move the pointer one
> pixel in this case and your code will move it 0 pixels. (The X driver does
> not reset the fractions, but that doesn't of course mean that it's the
> only right thing to do.)
>
> > Also, I think the extra unary minus is uncoth.
>
> The code was written like that to emphasize the fact that X and Y use the
> same formula, with the only difference that the kernel Y axis is mirrored
> compared to the touchpad Y axis.
>
> It didn't make any difference for the generated assembly code though,
> using gcc 3.4.2 from Fedora Core 3.
>
> > + enum { FRACTION_DENOM = 100 };
>
> The enum is much nicer than my #define.
OK. I like this patch, too. Can you guys send me a final version
incorporating the changes of you both for inclusion in the input tree?
--
Vojtech Pavlik
SuSE Labs, SuSE CR
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