[PATCH 3/3] winex11: Use TINN algorithm to speed up colour lookups. (try 2)

[Jesse Allen]

On 5/7/07, Duane Clark <fpga at pacbell.net> wrote:
> Dmitry Timoshkov wrote:
> > "Vitaly Budovski" <vbudovski at gmail.com> wrote:
> >
> >>> Now that you got rid of sqrt calls usage of float numbers internally
> >>> doesn't look justified (to me) anymore.
> >>>
> >> Only because in this instance it is used with integer data. It doesn't
> >> need to be limited to just integer values. Besides, what would be gained
> >> by changing it to integers as you suggest?
> >
> > What would be gained is an additional speed. Since this code is supposed
> > to be used to handle palette/color data there is no need to use floats at
> > all.
>
> While I cannot vouch for the accuracy, this might be of interest:
> http://lua-users.org/wiki/FloatingPoint
>
>

Vitaly,

I think I recommend using just integers, and make this private for
DIBs. Speed is nice for what we can use it for. If someone later needs
the float use, then we can create a separate float version and
included where-ever it's used. There is nothing wrong with having two
versions when each is justified. If you can get your code accepted
I'll probably move it over to the DIB engine eventually. If the
wined3d people want to use it, I could make it available somehow?

Jesse