Opened 12 years ago
Last modified 12 years ago
#4167 new defect
MapServer seems to always use GDAL driver with cascaded WMS (instead of AGG) — at Initial Version
| Reported by: | elzouavo | Owned by: | sdlime |
|---|---|---|---|
| Priority: | normal | Milestone: | |
| Component: | WMS Client | Version: | 5.6 |
| Severity: | normal | Keywords: | |
| Cc: |
Description
Hi,
I have some troubles using AGG with cascaded WMS.
I have my first mapfile that exposes WMS layers (MapServer is used as a WMS server and a WMS client): refs.map I have a second mapfile that contains a Postgis layer (this mapfile uses only MapServer as WMS server): roads.map I'm using MapServer 5.6.0 beta 3 on Debian (to avoid WFS requests issues with the folowing versions). But I have the same problem with 5.6.3. I advertise raster formats with "GetMap formats" to use AGG driver. I can get nice PNG with AGG when I request directly my second mapfile roads.map (using mapserver only as WMS server). But if I request my first mapfile refs.map (that then requests my second mapfile using MapServer as WMS client), I get PNG with bad aliasing (AGG does not seem to be used!).
I looked at the mapserv.log (for the WMS/GetMap that requests the cascaded WMS) and I saw : "msDrawGDAL(): red,green,blue,alpha bands = 1,2,3,4"
Does "msDrawGDAL" meen that DGAL driver is used instead of AGG driver ?
Thanks for your reply. Laurent NB : Sorry for my poor English...
An extract of my first mapfile (refs.map): "MAP ...
OUTPUTFORMAT
NAME "PNG" DRIVER "AGG/PNG" MIMETYPE "image/png" IMAGEMODE RGBA TRANSPARENT ON
END ... WEB
... METADATA
... "wms_getmap_formatlist" "image/png,image/jpg,image/jpeg"
END
END LAYER
NAME "my_layer" ... CONNECTIONTYPE WMS "http://my_domain/cgi-bin/mapserv?map=/my_path/roads.map"; METADATA
WMS_NAME "my_roads" "wms_server_version" "1.1.1" "wms_format" "image/png" ...
END
END ...
END"
An extract of my second mapfile (roads.map) : MAP ...
OUTPUTFORMAT
NAME "PNG" DRIVER "AGG/PNG" MIMETYPE "image/png" IMAGEMODE RGBA TRANSPARENT ON
END ... WEB
... METADATA
... "wms_getmap_formatlist" "image/png"
END
END LAYER
NAME "my_roads" ... CONNECTIONTYPE postgis
... END
... END
I'm not sure that this behavior should be different with mapserver 6.0...
NB: I've already post this message on Tue, 27 Apr 2010 in the mailing list, but no reply... ;-(
PNG with direct WMS access and an other with cascading access