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

[thomas bonfort]

On Thu, Apr 12, 2012 at 10:24, Thomas Joseph <Thomas.Joseph at awtwater.com> wrote:
> Hi
>
> Thanks for the quick response
>
> I also tried PC256 as discussed in the outputformat instruction sheet.  Although the image did look similar to the results from 5.7 and the size was much smaller it did not render transparent polygons correctly.
>
> I may have missed something else here.  Is there a way to turn off anti-aliasing with the AGG driver ?
Currently no. It could be implemented for simple (1 pixel wide) lines
and polygons, contact me if you would like a quote.

regards,
thomas

>
> Thanks again
>
>
> -----Original Message-----
> From: thomas bonfort [mailto:thomas.bonfort at gmail.com]
> Sent: Thursday, 12 April 2012 7:59 p.m.
> To: Thomas Joseph
> Cc: mapserver-users at lists.osgeo.org
> Subject: Re: [mapserver-users] Turn off anti-alias Mapserver 6.0
>
> 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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>