I think `WITH_GIF` is only used to read in GIF images (for symbols etc.)? As Even wrote GDAL/GIF doesn't seem to work as an OUTPUTFORMAT. I get:
msDrawMap(): Image handling error. Failed to draw layer named 'countries'. msOGRFileNextShape(): OGR error. OGR GetNextFeature() error'd. Check logs -- web:https://geographika.net & https://mapserverstudio.net twitter: @geographika On Fri, Sep 8, 2023, at 2:43 PM, Even Rouault wrote: > Philippe, > > Le 08/09/2023 à 14:16, Philippe Ghesquiere via MapServer-dev a écrit : >> Hi all, >> I am a little bit confused with GIF support for WMS/WMTS services. >> In several parts of the documentation, it is mentioned that GIF support is >> discarded with the end of the "GD library" support. >> >> I noticed the compilation option in CMakelists.txt : >> option(WITH_GIF "Enable GIF support (for PIXMAP loading)" ON) >> I do not understand the "for PIXMAP loading" comment. >> >> Anyway, our mapserver does not server WMS/WMTS tiles in GIF format. >> >> So here are my few questions : >> • is GIF support enabled by default for WMS/WMTS services ? > no >> • do I need to add the option : -DWITH_GIF=ON for cmake configuration ? > only to load raster symbols in GIF format >> • do I need to add a specific mapserver configuration, like : >> OUTPUTFORMAT >> NAME "GIF" >> DRIVER GDAL/GIF >> MIMETYPE "image/GIF" >> IMAGEMODE RGB >> EXTENSION "gif" >> END > I don't think that will work. The GDAL GIF driver already expects paletted > data, not RGB. And I don't think switching IMAGEMODE to PC256 would work > since that support has effectively gone. > > I believe the only option to get paletted data is to use PNG8 with the > AGG/PNG8 driver and MIMETYPE="image/png; mode=8bit" > > Even > > > >> Thanks for your help and advices >> Philippe >> >> The information in this e-mail is confidential. The contents may not be >> disclosed or used by anyone other than the addressee. Access to this e-mail >> by anyone else is unauthorised. >> If you are not the intended recipient, please notify Airbus immediately and >> delete this e-mail. >> Airbus cannot accept any responsibility for the accuracy or completeness of >> this e-mail as it has been sent over public networks. If you have any >> concerns over the content of this message or its Accuracy or Integrity, >> please contact Airbus immediately. >> All outgoing e-mails from Airbus are checked using regularly updated virus >> scanning software but you should take whatever measures you deem to be >> appropriate to ensure that this message and any attachments are virus free. >> _______________________________________________ >> MapServer-dev mailing list >> [email protected] >> https://lists.osgeo.org/mailman/listinfo/mapserver-dev >> > -- > http://www.spatialys.com > My software is free, but my time generally not. > _______________________________________________ > MapServer-dev mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/mapserver-dev >
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