Re: [Freetype-devel] Re: GSOC - Distance Fields

[Vincent Torri]

On Wed, Jul 15, 2020 at 7:14 AM Werner LEMBERG <wl@gnu.org> wrote:
>
>
> > I have added all the optimization modes to the module.
>
> Great, thanks!
>
> > By far the fastest method is to subdivide the curve into a number of
> > line segments.  [...]
>
> OK.  I'm glad that you took the time to implement the various
> algorithms so that we have such a comparison.
>
> > The major downside of the BB and subdivision methods is that they
> > require a considerable amount of memory usage (almost 3x of the size
> > of bitmap) because we need to keep a track of the distances and
> > signs of all the grid points.
>
> I don't think this is an issue.  For other rendering modes like LCD
> there are similar requirements, and platforms that are going to use
> SFDs certainly have plenty of memory.  It would be nice, however, if
> you can add this constraint to the documentation, and, if possible,
> also add a logging message that either predicts the necessary
> (approximate) amount of memory before the computation, and/or the
> actual memory use after generating an SFD.

what about adding the other two methods (or one of them) and decide
which one to choose with an option of the build system ? So one method
fast build consume more memory than other one which is slower.

Vincent Torri