[Qgis-developer] qgis-server and troubles using jpeg as output format

[Larry Shaffer]

Hi Andrea,

On Tue, Jun 24, 2014 at 3:21 PM, Andrea Peri <aperi2007 at gmail.com> wrote:

> Hi Larry,
>
> thx for hints,
>
> I never suppose the jpeg was due to a plugin.
> I check the existence of libjpeg, but never seen for a plugin folder
> because I'm running only the qgis-server without any desktop
> capability.
>
> Now searching for this plugin folder,
> effectively I see a broken symbolic link in the
> /usr/share/qt4/plugins  forward a ../../lib/qt4/plugins
>
> It seem like if I'm not install something....
> :/
>

Not sure what might be missing (or what Debian and Qt versions you are
using), but it seems the image format plugins are part of the QtGui package
install [0].

[0] https://packages.debian.org/wheezy/amd64/libqtgui4/filelist

Regards,

Larry


> I choose to install many libs from debian repos
> also these two:
> pyqt4-dev-tools, python-qt4-dev
>
> Perhaps I miss something other lib,
> but I guess this should be report by the cmake routines.
>
> Perhaps a missing check in the cmake ?
>
> Now I need to understand what library is missing.
> Unfortunately I'm not so skill with qt libs.
>
> there is somewhere a list of all the need libraries ?
>
> Thx,
>
> Andrea.
>
> 2014-06-24 21:46 GMT+02:00 Larry Shaffer <larrys at dakotacarto.com>:
> > Hi Andrea,
> >
> > It sounds to me like your Qt, when loaded by qgis_mapserv.fcgi, is not
> > correctly finding the 'plugins' directory, specifically its
> 'imageformats'
> > subdirectory. If that machine also runs QGIS Desktop, you can verify
> your Qt
> > install has the image plugins by launching QGIS and checking the
> Providers
> > section in the About QGIS dialog.
> >
> > Since Qt has native, built-in support for PNG, it should always be able
> to
> > render a WMS request to PNG. If Qt can not load the Qt JPEG image format
> > plugin, then JPEG will not be rendered.
> >
> > Just guessing, but you may try setting the env variable QT_PLUGIN_PATH in
> > the FCGI environment to help Qt find the plugins directory [0]. If the
> > imageformats subdirectory is missing some plugins, then there is
> something
> > funky/missing with your Qt install.
> >
> > [0] http://qt-project.org/doc/qt-4.8/deployment-plugins.html
> >
> > Regards,
> >
> > Larry
> >
> >
> > On Tue, Jun 24, 2014 at 7:26 AM, Andrea Peri <aperi2007 at gmail.com>
> wrote:
> >>
> >> Hi,
> >> I do some tests.
> >> Using a shell environment to see any error returned.
> >>
> >> I see using the
> >> "FORMAT=image/png"
> >>  the image is correctly returned.
> >> Instead using the
> >> "FORMAT=image/jpeg"
> >> the image is not returned.
> >> But no crash at all.
> >> Simply the qgis-server request will end returning nothing.
> >>
> >> Also using a debug session no error reported.
> >> Only apparently return nothing.
> >>
> >>
> >> A.
> >>
> >>
> >> 2014-06-24 14:31 GMT+02:00 Andrea Peri <aperi2007 at gmail.com>:
> >> > Hi,
> >> > I'm having some trouble with qgis-server and the output in jpeg
> format.
> >> >
> >> > The request getmap using the jpeg format as not response at all.
> >> >
> >> > I try on two distinct debian machine but the result is the same.
> >> >
> >> > So I guess the most probable theory is the lack of a library or a
> >> > library too early on Debian stable distro'.
> >> >
> >> > So I like to know what is the used jpeg library and if there is a
> >> > minimal version for the jpeg library used.
> >> >
> >> > Thx
> >> > --
> >> > -----------------
> >> > Andrea Peri
> >> > . . . . . . . . .
> >> > qwerty àèìòù
> >> > -----------------
> >>
> >>
> >>
> >> --
> >> -----------------
> >> Andrea Peri
> >> . . . . . . . . .
> >> qwerty àèìòù
> >> -----------------
> >> _______________________________________________
> >> Qgis-developer mailing list
> >> Qgis-developer at lists.osgeo.org
> >> http://lists.osgeo.org/mailman/listinfo/qgis-developer
> >
> >
>
>
>
> --
> -----------------
> Andrea Peri
> . . . . . . . . .
> qwerty àèìòù
> -----------------
>
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