[Chameleon] Setting quality for JPEG output

[Tyler Mitchell]

Thanks Jacod and Jason for the response.  I'm now hopeful.  I haven't liked having a "site-wide" setting for image_type, so this solution has been most helpful.  I'm still a bit skeptical that my map file settings are being picked at all - but I'll get over it :)

Tyler

----- Original Message -----
From: Jacob Delfos <jacob.delfos at maunsell.com>
Date: Friday, July 8, 2005 10:53 pm
Subject: RE: [Chameleon] Setting quality for JPEG output

> Hi Tyler,
> 
> The imagetype set in chameleon.xml will determine what is being 
> used, 
> but it still listens to the settings in the mapfile. So if you 
> want a 
> jpeg with 60% quality, then you have to specify the quality 
> setting in 
> the output format, like this:
> 
>        OUTPUTFORMAT
>                NAME jpeg
>                DRIVER "GD/JPEG"
>                MIMETYPE "image/jpeg"
>                IMAGEMODE RGB
>                EXTENSION "jpg"
>                FORMATOPTION "QUALITY=60"
>        END
> 
> I think with the current setting of "auto" for image type, it will 
> use 
> the imagetype setting in the mapfile as mapserver would do.
> 
> The customisation I posted was for chameleon version 1. I have 
> changed 
> it a little to automatically detect whether a raster exists in the 
> layers being drawn (while also using the "forcejpg" parameter in 
> the 
> metadata), and to switch to jpeg based on that. Let me know if you 
> want 
> me to send it to you.
> 
> regards,
> 
> Jacob
> 
> 
> 
> -----Original Message-----
> From: chameleon-bounces at lists.maptools.org
> To: Jason Grimes
> Cc: Chameleon User List
> Sent: 7/9/2005 1:00 PM
> Subject: Re: [Chameleon] Setting quality for JPEG output
> 
> Hi Jason,
> In traditional MapServer applications, I've done it several using the
> method you mentioned.  Are you saying that Chameleon actually 
> checks the
> IMAGETYPE from the map file?  I don't think so.  It ignores it on mine
> and relies on the config/chameleon.xml image_type setting which is 
> usedat map drawing time in the drawmap.php scripts.  As far as I 
> can tell,
> the only valid values for that setting are specific formats that GD
> supports and not related to the map settings for IMAGETYPE.  My 
> questionis really how to specify a quality setting for the 
> image_type that
> Chameleon uses, not how to set it in the map file.  If that makes any
> sense...
> 
> Am I'm going mad or is this tricky for everyone else too?
> 
> Tyler
> 
> ----- Original Message -----
> From: Jason Grimes <jgrimes at gi.alaska.edu>
> Date: Friday, July 8, 2005 3:40 pm
> Subject: Re: [Chameleon] Setting quality for JPEG output
> 
> > Hi Tyler,
> >
> > You set this with FORMATOPTION in the OUTPUTFORMAT block of 
> your map
> > file.  Here is what I have mine set to...
> >
> >        IMAGETYPE jpeg
> >        IMAGECOLOR 255 255 255
> >                                                  
> >        OUTPUTFORMAT
> >                NAME jpeg
> >                DRIVER "GD/JPEG"
> >                MIMETYPE "image/jpeg"
> >                IMAGEMODE RGB
> >                EXTENSION "jpg"
> >                FORMATOPTION "QUALITY=100"
> >        END
> >
> > The IMAGETYPE must match the NAME in OUTPUTFORMAT.
> >
> > Jason G
> >
> > On Fri, 2005-07-08 at 11:20, Tyler Mitchell wrote:
> > > Jacob,
> > > I just discovered your drawmap mods for setting imagetype based
> > on layer
> > > metadata -- very good!
> > > http://lists.maptools.org/pipermail/chameleon/2004-
> > August/001253.html> It is just what I have been needing.
> > >
> > > Does anyone know if I can set the compression/quality for JPEG
> > output?
> > > I know how I'd do it in a map file, but $szImgType in
> > drawmap.php seems
> > > to only refer to image format, not sub-settings for that format.
> > >
> > > Can anyone give me some pointers?
> > >
> > > Tyler
> > > _______________________________________________
> > > Chameleon mailing list
> > > Chameleon at lists.maptools.org
> > > http://lists.maptools.org/mailman/listinfo/chameleon
> >
> > _______________________________________________
> > Chameleon mailing list
> > Chameleon at lists.maptools.org
> > http://lists.maptools.org/mailman/listinfo/chameleon
> >
> 
> _______________________________________________
> Chameleon mailing list
> Chameleon at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/chameleon
> 
> _______________________________________________
> Chameleon mailing list
> Chameleon at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/chameleon
>