doxygenated core and imgproc modules (C++ API only)

modules/core/include/opencv2/core/operations.hpp

@@ -1474,6 +1474,13 @@ inline LineIterator LineIterator::operator ++(int)
     ++(*this);
     return it;
 }
+inline Point LineIterator::pos() const
+{
+    Point p;
+    p.y = (ptr - ptr0)/step;
+    p.x = ((ptr - ptr0) - p.y*step)/elemSize;
+    return p;
+}
 
 #if 0
   template<typename _Tp> inline VectorCommaInitializer_<_Tp>::

modules/core/src/drawing.cpp

@@ -227,6 +227,10 @@ LineIterator::LineIterator(const Mat& img, Point pt1, Point pt2,
         minusStep = bt_pix;
         count = dx + dy + 1;
     }
+    
+    this->ptr0 = img.data;
+    this->step = (int)step;
+    this->elemSize = bt_pix;
 }
 
 static void