Hi! I'm trying to use the AGG renderer and reduce the resulting 24bits image to 8bits by using the quantize method. This works quite well when the WMS parameter TRANSPARENT=false, but when set to true the BGCOLOR parameter seems to be ignored and the quality of the rendered vectors clearly degrades.
When requesting 24bit images the TRANSPARENT parameter works correctly. See the examples below: 24bit png, transparent true -> OK: http://159.162.103.7/cgi-bin/NorgeTopo?VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&SRS=EPSG:32633&BBOX=62423.20,6794915.15,66383.94,6797147.88&LAYERS=Hoydekurver&STYLES=&WIDTH=926&HEIGHT=522&FORMAT=image/png;%20mode=24bit&BGCOLOR=0xffffff&TRANSPARENT=true 24bit png, transparent false -> OK: http://159.162.103.7/cgi-bin/NorgeTopo?VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&SRS=EPSG:32633&BBOX=62423.20,6794915.15,66383.94,6797147.88&LAYERS=Hoydekurver&STYLES=&WIDTH=926&HEIGHT=522&FORMAT=image/png;%20mode=24bit&BGCOLOR=0xffffff&TRANSPARENT=false 8bit png, transparent false -> OK: http://159.162.103.7/cgi-bin/NorgeTopo?VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&SRS=EPSG:32633&BBOX=62423.20,6794915.15,66383.94,6797147.88&LAYERS=Hoydekurver&STYLES=&WIDTH=926&HEIGHT=522&FORMAT=image/png&BGCOLOR=0xffffff&TRANSPARENT=false 8bit png, transparent true -> NOT OK: http://159.162.103.7/cgi-bin/NorgeTopo?VERSION=1.1.1&SERVICE=WMS&REQUEST=GetMap&SRS=EPSG:32633&BBOX=62423.20,6794915.15,66383.94,6797147.88&LAYERS=Hoydekurver&STYLES=&WIDTH=926&HEIGHT=522&FORMAT=image/png&BGCOLOR=0xffffff&TRANSPARENT=true This is the output formats from the mapfile: ... OUTPUTFORMAT NAME "png8bit" DRIVER "AGG/PNG" MIMETYPE "image/png" EXTENSION "png" FORMATOPTION "QUANTIZE_FORCE=ON" FORMATOPTION "QUANTIZE_COLORS=256" FORMATOPTION INTERLACE=OFF END OUTPUTFORMAT NAME "png24bit" DRIVER "AGG/PNG" MIMETYPE "image/png; mode=24bit" EXTENSION "png" IMAGEMODE "RGB" FORMATOPTION INTERLACE=OFF END OUTPUTFORMAT NAME "jpeg24" DRIVER "AGG/JPEG" MIMETYPE "image/jpeg" EXTENSION "jpg" FORMATOPTION "QUALITY=60" END ... Regards, Pål Kristensen -- View this message in context: http://www.nabble.com/AGG-renderer-in-conjunction-with-WMS-TRANSPARENT%3Dtrue-parameter-tp14370293p14370293.html Sent from the Mapserver - User mailing list archive at Nabble.com.
