On Feb 3, 2010, at 10:37 AM, David MENTRE wrote:
> Hello,
>
> My latest copy of ocitysmap (the back-end of MapOSMatic) is failing
> with my locally compiled version of Mapnik 0.7.0 with following
> exception:
> File "/home/david/maposmatic/ocitysmap/ocitysmap/map_canvas.py",
> line 352, in my_render
> ctx)
> ArgumentError: Python argument types in
> mapnik._mapnik.render(Map, cairo.Context)
> did not match C++ signature:
> render(mapnik::Map, mapnik::Image32 {lvalue})
> render(mapnik::Map, mapnik::Image32 {lvalue}, unsigned int,
> unsigned int)
>
> I'm stuck here. Any idea where I should look at?
>
This indicates that either Cairo or PyCairo headers were not found
when you ran:
$ python scons/scons.py configure
So Mapnik was built without Cairo support.
You can confirm that this is the case by running these functions:
>>> import mapnik
>>> mapnik.has_cairo()
True
>>> mapnik.has_pycairo()
True
You need both of those to report True for the ability to render Cairo
contexts/surfaces via the Mapnik Python bindings.
So, try reconfiguring Mapnik and rebuilding.
python scons/scons.py CAIRO=True
On Ubuntu Karmic there is a bug in the cairomm package
(https://bugs.launchpad.net/ubuntu/+source/cairomm/+bug/452733
) that make pkg-config fail to configure propertly and in turn tells
Mapnik that Cairo support is not available. See my notes here for a
solution:
http://trac.mapnik.org/wiki/UbuntuInstallation#InstallMapnikfromsource
Once you've rebuild Mapnik with Cairo support you will can also
confirm support for PYCAIRO by calling render() without arguments and
seeing what objects you can pass it:
>>> from mapnik import *
>>> render()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
Boost.Python.ArgumentError: Python argument types in
mapnik._mapnik.render()
did not match C++ signature:
render(mapnik::Map, PycairoContext*)
render(mapnik::Map, PycairoContext*, unsigned int, unsigned int)
render(mapnik::Map, PycairoSurface*)
render(mapnik::Map, PycairoSurface*, unsigned int, unsigned int)
render(mapnik::Map, mapnik::Image32 {lvalue})
render(mapnik::Map, mapnik::Image32 {lvalue}, unsigned int,
unsigned int)
Dane
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