AGG anti-aliasing does not appear to be working

[tbonfort]

Reporter: woodbri Date: 2007/07/25 - 20:33 This mapfile was working when the labels FOLLOW was broken, but now that the labels are working it does not look like the anti-aliasing is working. Notice the jaggy edges along some of the shallow angle streets.

http://imaptools.com/cgi-bin/mapserv-4.99?mode=map&layers=all&scale=10000&map=/u/data/maps/google-agg.map&mapxy=-87.65+41.85&map_size=450+350

woodbri@carto:/u/software/mapserver-SVN/mapserver$ svn info
Path: .
URL: https://svn.osgeo.org/mapserver/trunk/mapserver
Repository UUID: 7532c77e-422f-0410-93f4-f0b67bdd69e2
Revision: 6392
Node Kind: directory
Schedule: normal
Last Changed Author: dmorissette
Last Changed Rev: 6390
Last Changed Date: 2007-07-25 12:59:10 -0400 (Wed, 25 Jul 2007)
Properties Last Updated: 2007-07-18 10:07:09 -0400 (Wed, 18 Jul 2007)

woodbri@carto:/u/software/mapserver-SVN/mapserver$ cat ../../doit-mapserver-4.10
./configure \
  --enable-ignore-missing-data \
  --enable-debug \
  --with-httpd=/usr/sbin/apache \
  --with-proj=/usr \
  --with-agg=/u/software/agg-2.5 \
  --with-gd \
  --with-gdal \
  --with-freetype \
  --with-postgis \
  --without-tiff \
  --with-wmsclient \
  --with-ogr \
  --with-wfs \

woodbri@carto:/u/software/mapserver-SVN/mapserver$ ./mapserv-4.99 -v MapServer version 5.0.0-beta1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE

[tbonfort]

Author: sdlime Date: 2007/07/25 - 21:42 Do you see the same behavior with your spiral example? I didn't notice any reduction in AGG quality post clearing the alpha buffer. That change doesn't impact AGG, just the GD image alpha channel post rendering.

Steve

[tbonfort]

Author: woodbri Date: 2007/07/25 - 22:26 FYI: I will be gone until Tuesday July 31st.

http://imaptools.com/cgi-bin/mapserv-4.99?mode=map&map=/u/data/test/spiral.map

I changed the background color to black to get more contrast and you can see the jaggies in spiral.

[tbonfort]

Author: sdlime Date: 2007/07/26 - 01:04 I pulled the alpha reset code from mapdraw.c... Will pursue an alternate solution.

Steve

[tbonfort]

Author: sdlime Date: 2007/07/30 - 20:00 Ok, Thomas Bonfort has been very helpful is putting the finishing touches on the AGG support. Marking as closed. Let me know if you find otherwise.

Steve