[Mapserver-users] Anti-Aliasing of lines

Alexander Pucher pucher at atlas.gis.univie.ac.at
Thu Mar 18 01:19:11 PST 2004


Hi all,

Steve, please excuse if this isn't the right place for this discussion. 
I checked the GD documentation 
(http://www.boutell.com/gd/manual2.0.22.html) and found this:

------------------------------------------
What's new in version 2.0.12?

[...]

Support for fast drawing of antialiased lines and polygons, by Bright 
Fulton and Frank Faubert. To learn more about this feature, read about 
the gdImageSetAntiAliased 
<http://www.boutell.com/gd/manual2.0.22.html#gdImageSetAntiAliased> 
function, which is used to set the foreground color for antialiasing, as 
well as the gdAntiAliased 
<http://www.boutell.com/gd/manual2.0.22.html#gdAntiAliased> constant, 
which is passed to line- and polygon-drawing functions in place of a color.

[...]

gdAntiAliasing(CONSTANT)
Used in place of a color when invoking a line-drawing function such as 
gdImageLine <http://www.boutell.com/gd/manual2.0.22.html#gdImageLine> or 
gdImageRectangle 
<http://www.boutell.com/gd/manual2.0.22.html#gdImageRectangle>. When 
gdAntiAliased is used as the color, the foreground color set with 
gdImageSetAntiAliased 
<http://www.boutell.com/gd/manual2.0.22.html#gdImageSetAntiAliased> is 
used, with antialiasing mechanisms to minimize any "jagged" appearance. 
For more information, see gdImageSetAntiAliased 
<http://www.boutell.com/gd/manual2.0.22.html#gdImageSetAntiAliased>.

[...]
------------------------------------------

So, it seems that GD is able to draw anti-aliased lines. Is there a way 
to let mapserver use these functionality?

Thanks for any input.
alex.



Steve Lime wrote:

>Yup, we can do what GD does at this point. 
>
>Steve
>
>  
>
>>>>Alexander Pucher <pucher at atlas.gis.univie.ac.at> 3/17/2004 8:12:14
>>>>        
>>>>
>AM >>>
>Hi,
>
>what is the recent status of anti-aliasing of lines in MapServer. The 
>limitation is GD, is this correct?
>
>regards,
>alex.
>
>_______________________________________________
>Mapserver-users mailing list
>Mapserver-users at lists.gis.umn.edu 
>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
>
>
>  
>

-- 
-------------------------------------------------------- 
Departement of Geography and Regional Research
University of Vienna
Cartography and GIS
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Virtual Map Forum: http://www.gis.univie.ac.at/vmf
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