Define a native interface for unwrapping the cv:Mat from a Matrix object

inc/Matrix.h

@@ -0,0 +1,28 @@
+/*
+  This file defines the public native interface into an node-opencv Matrix
+  object.  This is used to retrieve the wrapped OpenCV cv:Mat object from other
+  native code:
+
+  NAN_METHOD(UnwrapMatrix) {
+    cv::Mat mat = Nan::ObjectWrap::Unwrap<node_opencv::Matrix>(info[0]->ToObject())->mat;
+    // ...
+  }
+
+ */
+#ifndef NODE_OPENCV_MATRIX_H
+#define NODE_OPENCV_MATRIX_H
+#include <opencv/cv.h>
+#include <node_object_wrap.h>
+
+namespace node_opencv {
+
+class Matrix: public Nan::ObjectWrap {
+public:
+  cv::Mat mat;
+protected:
+  Matrix(): Nan::ObjectWrap() {};
+};
+
+}
+
+#endif // NODE_OPENCV_MATRIX_H

include_dirs.js

@@ -0,0 +1,14 @@
+// Outputs the path to public node-opencv header files.  This is used when
+// building other native node modules that require access to the
+// node-opencv Matrix base class.
+//
+// To use this file, add something like the following to your binding.gyp:
+//
+//      "include_dirs": [
+//        "<!@(pkg-config --cflags opencv)",
+//        "<!(node -e \"require('nan')\")",
+//        "<!(node -e \"require('opencv/include_dirs')\")"
+//      ],
+//
+var path = require('path');
+console.log(path.relative('.', path.join(__dirname, 'inc')));

src/Matrix.cc

@@ -145,22 +145,22 @@ NAN_METHOD(Matrix::New) {
 }
 
 Matrix::Matrix() :
-    Nan::ObjectWrap() {
+    node_opencv::Matrix() {
   mat = cv::Mat();
 }
 
 Matrix::Matrix(int rows, int cols) :
-    Nan::ObjectWrap() {
+    node_opencv::Matrix() {
   mat = cv::Mat(rows, cols, CV_32FC3);
 }
 
 Matrix::Matrix(int rows, int cols, int type) :
-    Nan::ObjectWrap() {
+    node_opencv::Matrix() {
   mat = cv::Mat(rows, cols, type);
 }
 
 Matrix::Matrix(cv::Mat m, cv::Rect roi) :
-    Nan::ObjectWrap() {
+    node_opencv::Matrix() {
   mat = cv::Mat(m, roi);
 }
 

src/Matrix.h

@@ -1,9 +1,9 @@
+
 #include "OpenCV.h"
+#include "../inc/Matrix.h"
 
-class Matrix: public Nan::ObjectWrap {
+class Matrix: public node_opencv::Matrix{
 public:
-
-  cv::Mat mat;
   static Nan::Persistent<FunctionTemplate> constructor;
   static void Init(Local<Object> target);
   static NAN_METHOD(New);