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

[Andrea Peri]

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....
:/

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
-----------------