On Thursday 05 March 2009, you wrote: > for this to work, you'll *have* to compile mapserver with > "--with-experimental-png". > (i.e. mapserv -v should ouput SUPPORTS=RGBA_PNG) I confirm, that after recompiling with "--with-experimental-png" 8bit transparency is working. Thank You Thomas. > > once this is done, you should supply a palette file with rgba > quadruplets. In your example, your palette entries are incorrect: > 0,0,0 is a triplet instead of a quadruplet (should be 0,0,0,0) > > On a side note, your 230,230,230,0 isn't usefull, as it corresponds > to 0,0,0,0 , thus eating up a entry in your generated palette (and > palette entries in rgba mode are very expensive :) ) > > -- > Thomas Bonfort > CampToCamp > > On Thu, Mar 5, 2009 at 10:29, Ivan Mincik <[email protected]> wrote: > > I am not sure if is it possible to reduce AGG PNG image to 8bit by > > "PALETTE_FORCE=TRUE" option and keep transparent background. > > I went through all posts about this issue and it is not clear for me if I > > still need to compile mapserver with "--with-experimental-png" switch or it > > is currently not possible. > > > > I have tested all possible parameters and combinations of RGB or RGBA in > > OUTPUTFORMAT and palette file with BLACK BACKGROUND as result. > > > > /usr/lib/cgi-bin/mapserv -v > > MapServer version 5.2.1 OUTPUT=GIF OUTPUT=PNG OUTPUT=JPEG OUTPUT=WBMP > > OUTPUT=SVG SUPPORTS=PROJ SUPPORTS=AGG SUPPORTS=FREETYPE SUPPORTS=ICONV > > SUPPORTS=WMS_SERVER SUPPORTS=WMS_CLIENT SUPPORTS=WFS_SERVER > > SUPPORTS=WFS_CLIENT SUPPORTS=WCS_SERVER SUPPORTS=FASTCGI SUPPORTS=THREADS > > SUPPORTS=GEOS INPUT=EPPL7 INPUT=POSTGIS INPUT=OGR INPUT=GDAL INPUT=SHAPEFILE > > > > I use mapserver as WMS server. > > > > Currently I have this in mapfile: > > > > NTERLACE OFF > > TRANSPARENT TRUE > > IMAGETYPE AGG8 > > OUTPUTFORMAT > > NAME "AGG8" > > DRIVER "AGG/PNG" > > MIMETYPE "image/png" > > EXTENSION "png" > > IMAGEMODE "RGBA" - #(IMAGEMODE "RGB" is working, nice result > > without transparent background) > > FORMATOPTION INTERLACE=OFF > > FORMATOPTION "PALETTE_FORCE=TRUE" > > FORMATOPTION "PALETTE=/s/agg_8bit_pal.txt" > > END > > > > And palette file: > > > > 0,0,0 > > 255,255,255,255 > > 230,230,230,0 > > 174,17,52,255 > > 174,17,52,255 > > 242,221,190,255 > > > > Please, can anybody clarify this? > > Thanks > > Ivan > > > > > > _______________________________________________ > > mapserver-users mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/mapserver-users > > >
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