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List:       mapserver-dev
Subject:    [mapserver-dev] RE: [UMN_MAPSERVER-DEV] Performance transparency
From:       johan.hallgren () logica ! com (Hallgren, Johan)
Date:       2008-03-26 15:55:22
Message-ID: E6F608E47F9D504FA3BF7F0732620C93140CD7D9F1 () SE-EX007 ! groupinfra ! com
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Hello Thomas

I tried it today with no success.

I used the Tortoise client.

Connected to https://svn.osgeo.org/mapserver/trunk/mapserver

And I get the default version.

I changed my settings in nmake.opt and build it.

This is my layer section:
LAYER
  TYPE POLYGON
  STATUS ON
  DATA "C:/Project/DATA/Lantmateriet/raster/tatort/index.shp"
  TEMPLATE "c:\temp\template.txt"
  CLASS
    STYLE
      OUTLINECOLOR 0 0 255
      COLOR 255 0 0
      OPACITY 50
    END
  END
END

I tried several times but it either draws the polygon with a solid color or with no \
filling at all.

Did I get the wrong version from CVS or did a something else wrong?

/Johan
___________________________________


Johan Hallgren


Logica
Pelle Bergs backe 3
Box 1938, 791 19 Falun
Tel (och mobil): 023-547 46 (int: +46-2354746)
johan.hallgren@logica.com
http://www.logica.se
-----Original Message-----
From: mapserver-dev-bounces@lists.osgeo.org \
                [mailto:mapserver-dev-bounces@lists.osgeo.org] On Behalf Of thomas \
                bonfort
Sent: den 25 mars 2008 09:13
To: Hallgren, Johan
Cc: mapserver-dev@lists.osgeo.org
Subject: Re: [mapserver-dev] RE: [UMN_MAPSERVER-DEV] Performance transparency

hi...

to get the source:
http://mapserver.gis.umn.edu/development/cvs/

to use opacity:
just add an OPACITY keyword in your style blocks (and remove the
opacity keyword from your layer ones). eg

STYLE
 COLOR 255 0 0
 OPACITY 50
END

for a semi-transparent polygon

thomas

On Tue, Mar 25, 2008 at 9:01 AM, Hallgren, Johan
<johan.hallgren@logica.com> wrote:
> Hello Thomas
> 
> I have to ask you;
> -       How do I download the source I need? Do I have to download file by file, or \
>                 could I download all files at once?
> -       How do I activate the transparency, where in the mapfile?
> 
> /Johan
> 
> ___________________________________
> 
> 
> Johan Hallgren
> 
> 
> Logica
> Pelle Bergs backe 3
> Box 1938, 791 19 Falun
> Tel (och mobil): 023-547 46 (int: +46-2354746)
> johan.hallgren@logica.com
> http://www.logica.se
> 
> -----Original Message-----
> 
> From: thomas bonfort [mailto:thomas.bonfort@gmail.com]
> Sent: den 23 mars 2008 19:16
> To: Hallgren, Johan
> Cc: mapserver-dev@lists.osgeo.org
> Subject: Re: [mapserver-dev] RE: [UMN_MAPSERVER-DEV] Performance transparency
> 
> 
> 
> hi all,
> code for AGG style level opacity is in the trunk (see
> http://trac.osgeo.org/mapserver/ticket/1155 for limitations)
> please report back if you see anything fishy going on...
> 
> On Fri, Mar 21, 2008 at 8:02 AM, Hallgren, Johan
> <johan.hallgren@logica.com> wrote:
> > Have you seen any performance differences? I don't know if you have followed my \
> > question but the problem we had was that when the size of the image increased the \
> > performance decreased more than expected (when using transparency). We had a \
> > raster map in background and rendered a polygon layer on top. As you probably \
> > understand we need to see thru the polygons. We want to have the polygon layer \
> > semi transparent, like 40% transparent or so. 
> > Do you think you work will affect us?
> 
> yes, you should gain performance-wise by using style rather than layer
> level opacity.
> you gain:
> * creation of a temporary gd image (that's image_height mallocs the
> way gd works)
> * merging of the temporary image onto the main mapserver image
> (width*height blending operations)
> * destroying of the temp image
> 
> cheers.
> thomas
> 
> 
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