fixed building Python wrappers when Numpy is not available

CMakeLists.txt

@@ -1321,7 +1321,11 @@ message(STATUS "")
 message(STATUS "  Interfaces: ")
 message(STATUS "    Python:                    ${BUILD_NEW_PYTHON_SUPPORT}")
 message(STATUS "    Python interpreter:        ${PYTHON_EXECUTABLE}")
-message(STATUS "    Python numpy:              ${PYTHON_USE_NUMPY}")
+if (PYTHON_USE_NUMPY)
+message(STATUS "    Python numpy:              YES")
+else()
+message(STATUS "    Python numpy:              NO (Python interface will not cover OpenCV 2.x API)")
+endif()
 
 if(IPP_FOUND AND USE_IPP)
 message(STATUS "    Use IPP:                   ${IPP_PATH}")

modules/features2d/include/opencv2/features2d/features2d.hpp

@@ -1400,8 +1400,8 @@ public:
     virtual void detect( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask=Mat() ) const;
 
     // todo read/write
-    virtual void read( const FileNode& fn ) {}
-    virtual void write( FileStorage& fs ) const {}
+    virtual void read( const FileNode& ) {}
+    virtual void write( FileStorage& ) const {}
 
 protected:
     Ptr<FeatureDetector> detector;
@@ -1421,8 +1421,8 @@ public:
     virtual void detect( const Mat& image, vector<KeyPoint>& keypoints, const Mat& mask=Mat() ) const;
 
     // todo read/write
-    virtual void read( const FileNode& fn ) {}
-    virtual void write( FileStorage& fs ) const {}
+    virtual void read( const FileNode& ) {}
+    virtual void write( FileStorage& ) const {}
 
 protected:
     Ptr<FeatureDetector> detector;

modules/python/cv.cpp

@@ -1860,7 +1860,7 @@ static int convert_to_floats(PyObject *o, floats *dst, const char *name = "no_na
   } else if (PyNumber_Check(o)) {
     dst->count = 1;
     dst->f = new float[1];
-    dst->f[0] = PyFloat_AsDouble(o);
+    dst->f[0] = (float)PyFloat_AsDouble(o);
   } else {
     return failmsg("Expected list of floats, or float for argument '%s'", name);
   }
@@ -3847,9 +3847,11 @@ static int zero = 0;
 
 #include "generated0.i"
 
+#if PYTHON_USE_NUMPY
 #include "opencv2x.h"
 #include "pyopencv_generated_types.h"
 #include "pyopencv_generated_funcs.h"
+#endif
 
 static PyMethodDef methods[] = {
 
@@ -3865,7 +3867,10 @@ static PyMethodDef methods[] = {
   {"temp_test", temp_test, METH_VARARGS},
 
 #include "generated1.i"
+
+#if PYTHON_USE_NUMPY
 #include "pyopencv_generated_func_tab.h"
+#endif
 
   {NULL, NULL},
 };
@@ -3918,7 +3923,10 @@ void initcv()
   MKTYPE(memtrack);
 
 #include "generated4.i"
+
+#if PYTHON_USE_NUMPY
 #include "pyopencv_generated_type_reg.h"
+#endif
 
   m = Py_InitModule(MODULESTR"", methods);
   d = PyModule_GetDict(m);
@@ -4015,7 +4023,10 @@ void initcv()
   PUBLISH(GC_EVAL);
 
 #include "generated2.i"
+
+#if PYTHON_USE_NUMPY
 #include "pyopencv_generated_const_reg.h"
+#endif
 
 #if 0
   {

modules/python/gen2.py

@@ -49,7 +49,7 @@ static PyObject* pyopencv_from(const ${cname}& r)
 
 static bool pyopencv_to(PyObject* src, ${cname}& dst, const char* name="<unknown>")
 {
-    if( src == NULL or src == Py_None )
+    if( src == NULL || src == Py_None )
         return true;
     if(!PyObject_TypeCheck(src, &pyopencv_${name}_Type))
     {

modules/python/opencv2x.h

@@ -693,4 +693,11 @@ static inline PyObject* pyopencv_from(const Moments& m)
                          "nu30", m.nu30, "nu21", m.nu21, "nu12", m.nu12, "mu03", m.nu03);
 }
 
+static inline PyObject* pyopencv_from(const CvDTreeNode* node)
+{
+    double value = node->value;
+    int ivalue = cvRound(value);
+    return value == ivalue ? PyInt_FromLong(ivalue) : PyFloat_FromDouble(value);
+}
+
 #endif