2013/2/24 Werner LEMBERG <w...@gnu.org>
>
> > I wanted to know your opinion on the rounding errors when splitting
> > Bezier segments. [...]
> >
> > the alternative method would overflow one bit quicker for conic and
> > 3 bits quicker for cubic segments.
>
> I think this enhanced precision is only worth the effort if it
> improves rendering. So: Do you have an example which gets enhanced?
> In particular, which gets *visibly* enhanced? Otherwise, speed is
> more important.
>
> I agree. If I recall correctly this code was left as is intentionally,
i.e.:
- for "small" glyph rendering, the rasterizer uses units of 1/1024 pixels.
- for "large" glyph rendering, it uses units of 1/64 pixels.
Due to the numerical stability of the computations, the total error won't
exceed one unit in the current implementation. It's hardly something that
is going to be noticeable, so simplicity / speed of implementation is more
important.
Of course, I could be wrong, but it'd be nice to have a counter-example
then.
David
Werner
>
> _______________________________________________
> Freetype-devel mailing list
> Freetype-devel@nongnu.org
> https://lists.nongnu.org/mailman/listinfo/freetype-devel
>
_______________________________________________
Freetype-devel mailing list
Freetype-devel@nongnu.org
https://lists.nongnu.org/mailman/listinfo/freetype-devel
