[mapserver-users] Turn off anti-alias Mapserver 6.0

[Stephen Woodbridge]

Tom,

Try this output definition:

     OUTPUTFORMAT
         NAME "agg_qn"
         DRIVER "AGG/PNG"
         EXTENSION "png"
         MIMETYPE "image/png"
         IMAGEMODE RGB
         FORMATOPTION "INTERLACE=false"
         FORMATOPTION "QUANTIZE_NEW=ON"
         FORMATOPTION "QUANTIZE_FORCE=ON"
         FORMATOPTION "QUANTIZE_DITHER=OFF"
         FORMATOPTION "QUANTIZE_COLORS=256"
         #TRANSPARENT ON
         #FORMATOPTION "TRANSPARENT=ON"
     END

-Steve W

On 4/12/2012 12:20 AM, Thomas Joseph wrote:
> We have recently upgraded from Mapserver 5.7 to 6.0 and although the AGG
> anti-alias lines look great the output image size has increased
> significantly from the previous rendering without anti-alias. I was just
> wondering if there is a way to turn off the anti-alias for polyline
> rendering in Mapserver 6.0. From the documentation it appeared that the
> previous GD driver did not include anti-alias by default. We have
> attempted to switch the outputformat from the new default AGG to the
> previous GD driver using the outputformat directive in the map file as
> shown below. This changed the image size slightly suggesting that
> mapserver was using a different driver to render, however the lines were
> still rendered with anti-alias on and the image was still relatively
> large compared to previous mapserver verison.
>
> OUTPUTFORMAT
>
> NAME "GDpng"
>
> DRIVER GD/PNG
>
> MIMETYPE "image/png"
>
> IMAGEMODE RGB
>
> EXTENSION "png"
>
> END
>
> Previously in Mapserver 5.7 we did not specify an outputformat we simply
> used IMAGETYPE PNG24 and the output was generated without anti-alias.
> Any suggestions would be greatly appreciated. If you need additional
> information let me know.
>
> tom
>
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