[mapserver-users] Problems with png output when using libpng 1.5

Christy Nieman cnieman at dmsolutions.ca
Wed Apr 20 06:20:25 PDT 2011


Hi,

I compiled MapServer 6.0 beta6 against libpng 1.5.2 and encountered the 
following problems:

    * when using the default png IMAGETYPE (i.e. no OUTPUTFORMAT block),
      I got yellow & striped maps (see cyprus.png)
    * when using the AGG/PNG driver and IMAGEMODE "RGBA", the output
      image looks fine
    * when using the default png8 IMAGETYPE, the output image looks fine

I also compiled with cairo, and with the driver set to CAIRO/PNG, I had 
the same yellow & striped maps.

With libpng 1.2.44, everything seems to work properly.  Has anyone else 
seen this problem with libpng 1.5?  Should it work properly with MapServer?

Regards,
Christy
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