antialiased lines with AGG

[thomas bonfort]

oh, and agg 2.4 is for the time being strictly identical to 2.5 ,
except for the license.

tb

On Nov 27, 2007 11:17 PM, thomas bonfort <thomas.bonfort at gmail.com> wrote:
> Rich:
>  it's your IMAGETYPE that you're setting wrong. it should reference
> one of the agg outputformats, eg IMAGETYPE AGG or IMAGETYPE AGG_Q
>
> thomas
>
>
> On Nov 27, 2007 11:03 PM, rich.fromm <nospam420 at yahoo.com> wrote:
> > Summary: I was previously trying to get antialiased lines working with
> > cartographic symbols and having no luck.  I've now switched my rendering
> > backend from GD to AGG and am still not able to get antialiased lines
> > working.
> >
> > I have downloaded and installed AGG 2.5.  I realize that for licensing
> > reasons, mapserver is currently suggesting AGG 2.4.  Might this be
> > significant?  I haven't yet tried this with AGG 2.4, I had thought the issue
> > was just one of licensing, and not functionality.  In case it's at all
> > relevant, some details of my install and build experience can be found here:
> >
> > http://lists.umn.edu/cgi-bin/wa?A2=ind0711&L=mapserver-users&D=1&T=0&O=D&X=5A77662D019C30E09D&Y=nospam420%40yahoo.com&P=52157
> > http://www.nabble.com/AGG-install-tf4390828.html#a13979959
> >
> > As suggested by Stephen Woodbridge <woodbri at SWOODBRIDGE.COM>:
> >
> > http://lists.umn.edu/cgi-bin/wa?A2=ind0711&L=mapserver-users&D=1&T=0&O=D&X=5A77662D019C30E09D&Y=nospam420%40yahoo.com&P=51780
> > http://www.nabble.com/AGG-docs-%28and-5.0.0-docs-in-general%29---tf4879380.html
> >
> > I am using the following as my reference for AGG:
> >
> > http://mapserver.gis.umn.edu/docs/howto/agg-rendering-specifics/?searchterm=agg
> >
> > There it says:
> >
> > ---
> > All rendering is now done antialiased by default. All ANTIALIAS keywords are
> > now ignored
> > ---
> >
> > I have narrowed things down to a fairly small testcase, with just a single
> > line layer:
> >
> >     LAYER
> >         NAME      majhwys
> >         DATA      MajHwys
> >         STATUS    DEFAULT           # DEFAULT means on
> >         TYPE      LINE
> >         CLASS
> >             NAME     "Major Highways"
> >             STYLE
> >                 COLOR      32 32 32
> >             END
> >         END
> >     END
> >
> > I have alternatively tried all three of the suggested PNG OUTPUTFORMAT's
> > from
> > that web page (only one at a time, of course):
> >
> >     OUTPUTFORMAT
> >         NAME 'AGG'
> >         DRIVER AGG/PNG
> >         IMAGEMODE RGB
> >     END
> >
> >     OUTPUTFORMAT
> >         NAME 'AGG'
> >         DRIVER AGG/PNG
> >         IMAGEMODE RGBA
> >     END
> >
> >     OUTPUTFORMAT
> >         NAME 'AGG_Q'
> >         DRIVER AGG/PNG
> >         IMAGEMODE RGB
> >         FORMATOPTION "QUANTIZE_FORCE=ON"
> >         FORMATOPTION "QUANTIZE_DITHER=OFF"
> >         FORMATOPTION "QUANTIZE_COLORS=256"
> >     END
> >
> > And I have also tried the following suggested OUTPUTFORMAT from
> > http://mapserver.gis.umn.edu/development/rfc/ms-rfc-32/?searchterm=AGG
> >
> >     OUTPUTFORMAT
> >         NAME 'AGG_PNG24'
> >         DRIVER AGG/PNG
> >         IMAGEMODE RGB
> >     END
> >
> > I have not tried JPEG, as I have not compiled with jpeg support.
> >
> > Additionally, I have alternatively tried this:
> >
> >     IMAGETYPE      PNG
> >
> > vs. this:
> >
> >     IMAGETYPE      PNG24
> >
> > So 8 permutations total.  In none of the cases am I rendering antialiased
> > lines.
> >
> > I tried adding 'ANTIALIAS TRUE' to the STYLE section (contrary to the advice
> > in the docs), and indeed it does not help.
> >
> > Antialiased text (in a more complex example) is working for me.  And indeed
> > I
> > no longer need the 'ANTIALIAS TRUE' in the corresponding LABEL section like
> > I
> > used to with GD.  The text is indeed antialiased automatically without it
> > now,
> > like the docs claim.
> >
> > But I can't get antialiased lines.  This is true if I specify no width (and
> > get lines of width 1), or if I specify a width with the WIDTH parameter in
> > the
> > STYLE section.
> >
> > See the attached png image which was generated using the first IMAGETYPE and
> > first OUTPUTFORMAT shown above, and has all of the major highways in all of
> > CA
> > and NV drawn with a single pixel width. [I hope this worked, the nabble web
> > interface to this mailing list isn't all that clear on whether or not it
> > did...]
> >
> > This is with mapserver-5.0.0, running on debian sarge (3.1), served via CGI
> > with apache2 2.0.54-5sarge1.
> >
> > Thanks for any help that anyone might be able to provide.
> >
> > - Rich Fromm
> >
> > --
> > View this message in context: http://www.nabble.com/antialiased-lines-with-AGG-tf4884770.html#a13980962
> > Sent from the Mapserver - User mailing list archive at Nabble.com.
> >
>