Exposed a bunch of OpenCV type constants.

binding.gyp

@@ -1,7 +1,7 @@
 {
-  "targets": [{ 
+  "targets": [{
       "target_name": "opencv"
-      , "sources": [ 
+      , "sources": [
           "src/init.cc"
         , "src/Matrix.cc"
         , "src/OpenCV.cc"
@@ -13,16 +13,17 @@
         , "src/HighGUI.cc"
         , "src/FaceRecognizer.cc"
         , "src/BackgroundSubtractor.cc"
+        , "src/Constants.cc"
         ]
       , 'libraries': [
           '<!@(pkg-config --libs opencv)'
         ]
-        
+
       # For windows
       ,'include_dirs': [
           '<!@(pkg-config --cflags opencv)'
           ]
-          
+
       , 'cflags': [
             '<!@(pkg-config --cflags "opencv >= 2.3.1" )'
             , '-Wall'
@@ -42,9 +43,8 @@
             , "GCC_ENABLE_CPP_RTTI": "YES"
             , "GCC_ENABLE_CPP_EXCEPTIONS": "YES"
           }
-        }]        
+        }]
-      
+
     ]
   }]
 }
-

src/Constants.cc

@@ -0,0 +1,58 @@
+#include "OpenCV.h"
+#include "Constants.h"
+
+#define CONST(C) inner->Set(String::NewSymbol(#C), Integer::New(C));
+
+void
+Constants::Init(Handle<Object> target) {
+
+  Persistent<Object> inner = Persistent<Object>::New(Object::New());
+
+  CONST(CV_8U);
+  CONST(CV_8S);
+  CONST(CV_16U);
+  CONST(CV_16S);
+  CONST(CV_32S);
+  CONST(CV_32F);
+  CONST(CV_64F);
+  CONST(CV_USRTYPE1);
+
+  CONST(CV_8UC1);
+  CONST(CV_8UC2);
+  CONST(CV_8UC3);
+  CONST(CV_8UC4);
+
+  CONST(CV_8SC1);
+  CONST(CV_8SC2);
+  CONST(CV_8SC3);
+  CONST(CV_8SC4);
+
+  CONST(CV_16UC1);
+  CONST(CV_16UC2);
+  CONST(CV_16UC3);
+  CONST(CV_16UC4);
+
+  CONST(CV_16SC1);
+  CONST(CV_16SC2);
+  CONST(CV_16SC3);
+  CONST(CV_16SC4);
+
+  CONST(CV_32SC1);
+  CONST(CV_32SC2);
+  CONST(CV_32SC3);
+  CONST(CV_32SC4);
+
+  CONST(CV_32FC1);
+  CONST(CV_32FC2);
+  CONST(CV_32FC3);
+  CONST(CV_32FC4);
+
+  CONST(CV_64FC1);
+  CONST(CV_64FC2);
+  CONST(CV_64FC3);
+  CONST(CV_64FC4);
+
+  target->Set(String::NewSymbol("Constants"), inner);
+}
+
+#undef CONST

src/Constants.h

@@ -0,0 +1,6 @@
+#include "OpenCV.h"
+
+class Constants: public node::ObjectWrap {
+ public:
+    static void Init(Handle<Object> target);
+};

src/init.cc

@@ -7,6 +7,7 @@
 #include "CamShift.h"
 #include "HighGUI.h"
 #include "FaceRecognizer.h"
+#include "Constants.h"
 
 
 extern "C" void
@@ -20,6 +21,8 @@ init(Handle<Object> target) {
     Contour::Init(target);
 	  TrackedObject::Init(target);
     NamedWindow::Init(target);
+    Constants::Init(target);
+
 
    #if CV_MAJOR_VERSION >= 2 && CV_MINOR_VERSION >=4
      FaceRecognizerWrap::Init(target);