, Andreas
-Ursprüngliche Nachricht-
Von: Rahkonen Jukka (MML)
Gesendet: Montag, 17. Mai 2021 16:14
An: Eichner, Andreas - SID ; Mapserver-Users
(mapserver-users@lists.osgeo.org)
Betreff: Re: [mapserver-users] differing image size with different mapserver
versions
Hi,
Does it mean that Map
Kopio: Rahkonen Jukka (MML) ;
Mapserver-Users (mapserver-users@lists.osgeo.org)
Aihe: Re: [mapserver-users] differing image size with different mapserver
versions
Progress! Using Andreas' suggestion:
changing the typedef in line 91 of mapagg.cpp from
typedef maps
ä: Eichner, Andreas - SID
Lähetetty: maanantai 17. toukokuuta 2021 16.53
Vastaanottaja: Rahkonen Jukka (MML) ;
Mapserver-Users (mapserver-users@lists.osgeo.org)
Aihe: AW: [mapserver-users] differing image size with different mapserver
versions
Hi Jukka,
as a result of the discussion IMO Erik
(MML)
> Gesendet: Montag, 17. Mai 2021 15:26
> An: Rahkonen Jukka (MML) ;
> Mapserver-Users (mapserver-users@lists.osgeo.org) <
> mapserver-users@lists.osgeo.org>
> Betreff: Re: [mapserver-users] differing image size with different
> mapserver versions
>
> Hi,
>
>
>
server-users] differing image size with different mapserver
versions
Hi,
(Re-sent as edited to mailing list because the body was originally too long.
Are you sure about “I actually found that 6.4 produced small, aliased images
with both the GD and AGG drivers”. Originally the AGG library
f ANTIALIAS options.
> -Jukka Rahkonen-
>
>
>
>
>
> *Lähettäjä:* mapserver-users
> *Puolesta
> *Richard Greenwood
> *Lähetetty:* maanantai 17. toukokuuta 2021 15.26
> *Kopio:* mapserver-users@lists.osgeo.org
> *Aihe:* Re: [mapserver-users] differing image size
Jukka (MML)
Lähetetty: maanantai 17. toukokuuta 2021 16.06
Vastaanottaja: Mapserver-Users (mapserver-users@lists.osgeo.org)
Aihe: Re: [mapserver-users] differing image size with different mapserver
versions
Hi,
(Re-sent as edited to mailing list because the body was originally too long.
Are you
d
Lähetetty: maanantai 17. toukokuuta 2021 15.26
Kopio: mapserver-users@lists.osgeo.org<mailto:mapserver-users@lists.osgeo.org>
Aihe: Re: [mapserver-users] differing image size with different mapserver
versions
Thanks for the suggestions. The consensus seems to be that anti-aliasing is
caus
It would be interesting to test the output size with more
> typical maps.
>
>
>
> -Jukka Rahkonen-
>
>
>
> *Lähettäjä:* mapserver-users
> *Puolesta
> *Seth G
> *Lähetetty:* maanantai 17. toukokuuta 2021 11.27
> *Vastaanottaja:* Richard Greenwood
> *Kopio:*
interesting to test the output size with more typical maps.
-Jukka Rahkonen-
Lähettäjä: mapserver-users Puolesta
Seth G
Lähetetty: maanantai 17. toukokuuta 2021 11.27
Vastaanottaja: Richard Greenwood
Kopio: mapserver-users@lists.osgeo.org
Aihe: Re: [mapserver-users] differing image size with
Hi Richard,
In your OUTPUTFORMAT declaration maybe try setting the DRIVER to *AGG/PNG8*
Also IMAGEMODE PC256 was only for GD support that was removed in 7.0. Try
IMAGEMODE RGB (or RGBA if you want transparency).
Seth
--
web:http://geographika.co.uk
twitter: @geographika
On Sat, May 15, 2021
I built from main and tested with ANTIALIAS ON and ANTIALIAS OFF. Assuming
that my mapfile syntax below is correct, there is no difference in size and
the resulting PNG is still approximately 3x larger than the MapServer 6.4
one.
CLASS
STYLE
COLOR 255 255 208
ANTIALIAS ON
END
Hi,
When I look at the images it seems like the 7.6 have anti-aliasing but
the 6.4 does not have it. The 7.6 is more fuzzy and the 6.4 image You
could that the river is not as smooth.
/Lars S.
Den 2021-05-15 kl. 17:43, skrTo ev Richard Greenwood:
I get significantly different image sizes be
Actually, I just tried to open mapserv64.png with gimp, and export it as
a non-interlaced or interlaced PNG. And the non-interlaced version is 60
kB vs 96 kB for interlaced. So interlacing vs non-interlacing isn't the
cause here.
Looking more closely at mapserv64.png vs mapserv76.png , they a
Even,
Thank you. I had ignored the difference in the interlacing of the two
images because I didn't think it would have affected the size.
The maprgbapng.c file no longer exists in MapServer 6.4 or 7.6. There is an
"if ( interlaced ..." code block in mapoutput.c that is the same in 6.4 and
7.6. I
Richard,
your 6.4 image is a interlaced PNG, whereas the 7.6 is a non-interlaced one.
I see in the git history a relevant commit:
$ git show 9984b39cc8f74d60eb240728df660a172a118aad
commit 9984b39cc8f74d60eb240728df660a172a118aad
Author: Thomas Bonfort
Date: Sun Oct 5 15:59:44 2008 +
I get significantly different image sizes between MapServer 6.4 and 7.6
with the same output format definition. I've tried many variations of the
following.
OUTPUTFORMAT
NAME "png-test"
DRIVER "AGG/PNG" # GD driver is same (6.4 only)
MIMETYPE "image/png; mode=8bit"
IMAGEMODE PC256
FORMA
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