Where is the antialiasing?

[Konrad Merz]

Hey

so I looked at that function and think that I understand that, now
just make sure that is right.

At the beginning and the end of each line you set an alpha value.
Is that to antialiasing the polygon? Is that right?

I talk about the xserver/fb/fbedg.c
fbRasterizeEdges8 function.

I hope you can answer me that.

Warm regards

Konrad


2007/5/1, Konrad Merz <konrad.merz at googlemail.com>:
> Hey JC
>
> Thank you I know this article very well ;) Thats why I want to look
> what Xorg do because I try some algorithm but the are very poor.
>
> Hey Carl,
>
> thank you I'll have a look on this, that is what I' searching for.
>
> bye
>
> Konrad
>
> 2007/4/30, Jay Cotton <Jay.Cotton at sun.com>:
> > Here is more info
> > http://en.wikipedia.org/wiki/Anti-aliasing
> >
> > This link seems to have pointers to line drawing.
> >
> > Sorry to be vague but most anti alias line drawing is done
> > by the drawing engines on the graphics boards.
> >
> > JC
> >
> >
> > Konrad Merz wrote:
> > >> Try Porter and Duff.
> > >>
> > >> ACM ~1968 (date may be wrong)
> > >>
> > >> Alpha blending is used to compose the characters.
> > >>
> > >> Anti aliasing ...  its in the freetype code base, and I think
> > >> Adobe has a patent (for hinting) and maybe Bitstream has
> > >> a patent for layout...
> > >>
> > >> jc
> > >>
> > >
> > > Hey jc,
> > >
> > > thank you for the fast answer, but I didn't mean the font Anti
> > > Aliasing. Instead I want to know the algorithm for Anti Aliased drawn
> > > lines. I searched in applications and librarys for such algorithm and
> > > everytime I come to the point were the xlib is called. I allready
> > > search a little in the Xorg code, but there are really many lines so
> > > hope for a hint where I could search.
> > >
> > > bye
> > > Konrad
> > > Konrad
> >
> >
>