numpy_array_converters.hxx
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36 #ifndef VIGRA_NUMPY_ARRAY_CONVERTERS_HXX
37 #define VIGRA_NUMPY_ARRAY_CONVERTERS_HXX
39 #include "numpy_array.hxx"
40 #include "metaprogramming.hxx"
41 #include <boost/python.hpp>
42 #include <boost/python/to_python_converter.hpp>
47 template <
class Array>
48 PyObject * returnNumpyArray(Array
const & a)
50 PyObject * pa = a.pyObject();
52 PyErr_SetString(PyExc_ValueError,
"returnNumpyArray(): Conversion to Python failed, array has no data.");
58 VIGRA_EXPORT std::set<std::string> & exportedArrayKeys();
60 template <
class ArrayType>
61 struct NumpyArrayConverter {};
63 template <
unsigned int N,
class T,
class Str
ide>
64 struct NumpyArrayConverter<NumpyArray<N, T, Stride> >
66 typedef NumpyArray<N, T, Stride> ArrayType;
67 typedef typename ArrayType::ArrayTraits ArrayTraits;
69 NumpyArrayConverter();
71 static void* convertible(PyObject* obj);
74 static void construct(PyObject* obj,
75 boost::python::converter::rvalue_from_python_stage1_data* data);
78 static PyObject* convert(ArrayType
const& a)
80 return returnNumpyArray(a);
84 template <
unsigned int N,
class T,
class Str
ide>
85 NumpyArrayConverter<NumpyArray<N, T, Stride> >::NumpyArrayConverter()
89 converter::registration
const * reg = converter::registry::query(type_id<ArrayType>());
93 if(!reg || !reg->rvalue_chain)
95 to_python_converter<ArrayType, NumpyArrayConverter>();
97 converter::registry::insert(&convertible, &construct, type_id<ArrayType>());
100 template <
unsigned int N,
class T,
class Str
ide>
101 void * NumpyArrayConverter<NumpyArray<N, T, Stride> >::convertible(PyObject* obj)
103 bool isCompatible = obj == Py_None || ArrayType::isStrictlyCompatible(obj);
111 template <
unsigned int N,
class T,
class Str
ide>
112 void NumpyArrayConverter<NumpyArray<N, T, Stride> >::construct(PyObject* obj,
113 boost::python::converter::rvalue_from_python_stage1_data* data)
115 void*
const storage =
116 ((boost::python::converter::rvalue_from_python_storage<ArrayType>* ) data)->storage.bytes;
118 ArrayType * array =
new (storage) ArrayType();
120 array->makeReferenceUnchecked(obj);
122 data->convertible = storage;
125 template <
unsigned int N,
class T,
class Str
ide>
126 struct NumpyArrayConverter<MultiArrayView<N, T, Stride> >
127 :
public NumpyArrayConverter<NumpyArray<N, T, Stride> >
129 typedef NumpyArrayConverter<NumpyArray<N, T, Stride> > BaseType;
130 typedef MultiArrayView<N, T, Stride> ArrayType;
132 NumpyArrayConverter()
135 converter::registry::insert(&BaseType::convertible, &BaseType::construct,
136 type_id<ArrayType>());
140 template <
class Iter,
class End>
141 struct RegisterNumpyArrayConverters
145 typedef typename UnqualifiedType<typename boost::mpl::deref<Iter>::type>::type Type;
146 NumpyArrayConverter<Type>();
147 RegisterNumpyArrayConverters<typename boost::mpl::next<Iter>::type, End>::exec();
152 struct RegisterNumpyArrayConverters<End, End>
158 template <
class Typelist>
159 void registerNumpyArrayConverters(Typelist)
161 RegisterNumpyArrayConverters<typename boost::mpl::begin<Typelist>::type,
162 typename boost::mpl::end<Typelist>::type >::exec();
166 FN registerConverters(FN f)
168 registerNumpyArrayConverters(boost::python::detail::get_signature(f));
175 namespace boost {
namespace python {
177 #define VIGRA_PYTHON_MULTITYPE_FUNCTOR(functor_name, function) \
179 struct functor_name##Impl \
181 typedef functor_name##Impl type; \
183 static void def(const char * pythonName) \
185 boost::python::def(pythonName, vigra::registerConverters(&function<T>)); \
188 template <class A1> \
189 static void def(const char * pythonName, A1 const & a1) \
191 boost::python::def(pythonName, vigra::registerConverters(&function<T>), a1); \
194 template <class A1, class A2> \
195 static void def(const char * pythonName, A1 const & a1, A2 const & a2) \
197 boost::python::def(pythonName, vigra::registerConverters(&function<T>), a1, a2); \
200 template <class A1, class A2, class A3> \
201 static void def(const char * pythonName, A1 const & a1, A2 const & a2, A3 const & a3) \
203 boost::python::def(pythonName, vigra::registerConverters(&function<T>), a1, a2, a3); \
208 struct functor_name##Impl<void> \
213 template <class T1, \
225 struct functor_name \
226 : public boost::python::TypeList<typename functor_name##Impl<T1>::type, \
227 boost::python::TypeList<typename functor_name##Impl<T2>::type, \
228 boost::python::TypeList<typename functor_name##Impl<T3>::type, \
229 boost::python::TypeList<typename functor_name##Impl<T4>::type, \
230 boost::python::TypeList<typename functor_name##Impl<T5>::type, \
231 boost::python::TypeList<typename functor_name##Impl<T6>::type, \
232 boost::python::TypeList<typename functor_name##Impl<T7>::type, \
233 boost::python::TypeList<typename functor_name##Impl<T8>::type, \
234 boost::python::TypeList<typename functor_name##Impl<T9>::type, \
235 boost::python::TypeList<typename functor_name##Impl<T10>::type, \
236 boost::python::TypeList<typename functor_name##Impl<T11>::type, \
237 boost::python::TypeList<typename functor_name##Impl<T12>::type, \
238 boost::python::TypeList<void, void> > > > > > > > > > > > > \
241 template <
class Head,
class Tail>
250 template <
class Head,
class Tail>
251 inline void multidef(
char const* functor_name, TypeList<Head, Tail>)
253 Head::def(functor_name);
254 multidef(functor_name, Tail());
257 template <
class Head,
class Tail>
258 inline void multidef(
char const* functor_name, TypeList<Head, Tail>,
const char * help)
260 Head::def(functor_name);
261 multidef(functor_name, Tail(), help);
264 template <
class Head,
class Tail,
class Args>
265 inline void multidef(
char const* functor_name, TypeList<Head, Tail>, Args
const& args)
267 Head::def(functor_name, args);
268 multidef(functor_name, Tail(), args);
271 template <
class Head,
class Tail,
class Args>
272 inline void multidef(
char const* functor_name, TypeList<Head, Tail>, Args
const& args,
char const * help)
274 Head::def(functor_name, args);
275 multidef(functor_name, Tail(), args, help);
278 template <
class Head,
class Tail>
279 inline void multidef(
char const* functor_name, TypeList<Head, TypeList<void, Tail> >)
281 Head::def(functor_name);
284 template <
class Head,
class Tail,
class Args>
285 inline void multidef(
char const* functor_name, TypeList<Head, TypeList<void, Tail> >, Args
const& args)
287 Head::def(functor_name, args);
290 template <
class Head,
class Tail>
291 inline void multidef(
char const* functor_name, TypeList<Head, TypeList<void, Tail> >,
const char * help)
293 Head::def(functor_name, help);
296 template <
class Head,
class Tail,
class Args>
297 inline void multidef(
char const* functor_name, TypeList<Head, TypeList<void, Tail> >, Args
const& args,
const char * help)
299 Head::def(functor_name, args, help);
304 #endif // VIGRA_NUMPY_ARRAY_CONVERTERS_HXX
Definition: graphs.hxx:57
Definition: accessor.hxx:43
Definition: numpy_array_converters.hxx:175