agg changes

[Zak James]

I vote for round endcaps by default.

zak

On 8/27/07, thomas bonfort <thomas.bonfort at gmail.com> wrote:
> the fix for
> http://trac.osgeo.org/mapserver/ticket/2264
> introduced some regressions that result in artifacts on thick lines and font
> outlines (anywhere else ?). will be looking into this soon.
>
> as for cartoline endcaps and joins, the documentation already exists, but
> will have to be updated for agg:
> http://mapserver.gis.umn.edu/docs/reference/symbology/syntax
>
> I'll keep you updated when those keywords will be taken into account for
> line drawing
>
> what should the default endcaps and joins be?
>
> On 8/27/07, Stephen Woodbridge <woodbri at swoodbridge.com> wrote:
> > thomas bonfort wrote:
> > > hi devs,
> > > I've commited a few changes to the agg rendering logic, which greatly
> > > increase performance when drawing many shapes. what's changed is that
> > > the imageObj now holds a pointer to the rendering object and all it's
> > > dependencies, instead of recreating them nearly from scratch each time a
> > > shape is drawn.
> > > on the "ntdb_roads_50" from a recent osgeo-discuss post
> > > before: 1.1seconds
> > > after: 0.5 seconds
> > >
> > > this is still much more than what gd does, but getting closer (that
> > > particular test file is probably a worst case scenario when comparing
> > > rendering times: many tiny line segments that just show up as a pixel
> > > with gd, but all have to be antialiased in agg)
> > >
> > > all this to say that I don't think there should be much breakage arising
> > > from this, but I'd appreciate if all of you who are set up to test agg
> > > could give the new version a run and report if anything weird is
> happening.
> > >
> > > thanks,
> > > thomas
> >
> > Thomas,
> >
> > This is built with SVN revision 6709.
> >
> >
> http://imaptools.com/cgi-bin/mapserv-4.99?mode=map&map=/u/data/test/spiral.map
> >
> http://imaptools.com/maps/compare-maps2.php?loc=1&ll=42.61935+-71.38918&address=&city=le+paso&state=tx&zipcode=&country=&asrv=1&amf=%2Fu%2Fdata%2Fmaps%2Fgoogle-aa2.map&msa=mapserv-4.10&bsrv=1&bmf=%2Fu%2Fdata%2Fmaps%2Fgoogle-agg.map&msb=mapserv-4.99&submit=Show
>
> >
> > I noticed that the endcaps of fat lines used to be rounded like GD, but
> > now it abruptly ends. look at the ends of the test spiral and the roads
> > on the bottom of the side by side comparison.
> >
> > Also, You meantioned a while back that some or all of the cartoline
> > endcap styles worked with AGG, could you review for me and the doc team
> > what the keywords are and how to include them in the AGG layer definition.
> >
> > Thanks,
> >    -Steve W
> >
>
>


-- 
Zak James
Applications and Software Development
DM Solutions Group Inc.
http://www.dmsolutions.ca