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

[thomas bonfort]

On Thu, Apr 12, 2012 at 06:20, Thomas Joseph <Thomas.Joseph at awtwater.com> 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
GD only supports PC256. If you set imagemode to RGB as here, mapserver
will switch back to AGG.

--
thomas

>
>   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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