Hi,
I did some quick tests with : OUTPUTFORMAT NAME "png_G0" DRIVER AGG/PNG MIMETYPE "image/png" IMAGEMODE RGB EXTENSION "png" FORMATOPTION "GAMMA=0.0" END and shp2img with options -i eg: shp2img -m 01_polygon_td_poly.map -o 01_polygon_td_poly.png -i png_G0 I did some tests with both polygons, polygon outlines and lines and they all seems to have anti-aliasing as far as I could see. Would this be an ok way to test it? I also have some people that would like to do lines without anti-aliasing for a strange reason. Lars Schylberg -----Originalmeddelande----- > Från: "Rahkonen Jukka (MML)" <[email protected]> > Till: "Eichner, Andreas - SID" <[email protected]>, "Erik H" > <[email protected]> > Kopia: [email protected] > Datum: 2017-10-18 11:13 > Ämne: Re: [mapserver-users] Draw roads WITHOUT anti-aliasing > > Hi, > > I suppose that the amount of antialiasing with AGG is set with "gamma" > parameter. Mapserver supports that at least for polygons as documented in > http://www.mapserver.org/mapfile/outputformat.html but you could try if using > gamma=0.0 has an effect on lines as well. It may be that it does not because > search > https://github.com/mapserver/mapserver/search?utf8=%E2%9C%93&q=gamma&type= > seems to find only something that is tied to polygon outlines > https://github.com/mapserver/mapserver/blob/branch-7-0/renderers/agg/include/agg_renderer_outline_aa.h > > > If gamma does not work for lines then it could be worth making a feature > request for adding a new formatoption "GAMMA_LINE=[]. > > Couple of Mapnik links dealing with the same issue: > http://gis.19327.n8.nabble.com/Turning-off-anti-aliasing-td5339458.html > http://mapnik.org/mapnik-reference/#3.0.6/line-gamma-method > > -Jukka Rahkonen- > > > > -----Alkuperäinen viesti----- > Lähettäjä: mapserver-users [mailto:[email protected]] > Puolesta Eichner, Andreas - SID > Lähetetty: 18. lokakuuta 2017 9:57 > Vastaanottaja: Erik H <[email protected]> > Kopio: [email protected] > Aihe: Re: [mapserver-users] Draw roads WITHOUT anti-aliasing > > Damn... missed attaching the images. > > > -----Ursprüngliche Nachricht----- > > Von: mapserver-users [mailto:[email protected]] > > Im Auftrag von Eichner, Andreas - SID > > Gesendet: Mittwoch, 18. Oktober 2017 08:28 > > An: Erik H > > Cc: [email protected] > > Betreff: Re: [mapserver-users] Draw roads WITHOUT anti-aliasing > > > > Hi, > > > > I just meant that it seems to be pretty easy to implement aliased > > rendering with AGG. > > Simply changing the typedef in line 91 of mapagg.cpp from > > > > typedef mapserver::renderer_scanline_aa_solid<renderer_base> > > renderer_scanline; > > > > to > > > > typedef mapserver::renderer_scanline_bin_solid<renderer_base> > > renderer_scanline; > > > > turns of anti-aliased rendering. I've attached the output of "shp2img > > -m line_simple.map" from the msautotests. > > An additional member in class AGG2Renderer for the aliased rasterizer > > and conditionally passing one or the other to render_scanlines() > > depending on some value of strokeStyleObj might be enough. > > > > Regards > > > > > -----Ursprüngliche Nachricht----- > > > Von: Erik H [mailto:[email protected]] > > > Gesendet: Dienstag, 17. Oktober 2017 17:34 > > > An: Eichner, Andreas - SID > > > Cc: Richard Greenwood; [email protected] > > > Betreff: Re: [mapserver-users] Draw roads WITHOUT anti-aliasing > > > > > > As for Andreas' remark about 'simply the use of another scanline > > > rasterizer.' - I'm sorry but I'm not much of a C++ developer. If I > > have > > > to do rasterizing, I'd skip MapServer altogether and generate the > > > PNG > > in > > > Java. > > > > > _______________________________________________ > > mapserver-users mailing list > > [email protected] > > https://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ > mapserver-users mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/mapserver-users --
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