Added Canvas::constructor

src/Canvas.cc

@@ -30,16 +30,16 @@
 void
 Canvas::Initialize(Handle<Object> target) {
   HandleScope scope;
-  Local<FunctionTemplate> t = FunctionTemplate::New(Canvas::New);
-  t->InstanceTemplate()->SetInternalFieldCount(1);
-  t->SetClassName(String::NewSymbol("Canvas"));
+	constructor = Persistent<FunctionTemplate>::New(FunctionTemplate::New(Canvas::New));
+  constructor->InstanceTemplate()->SetInternalFieldCount(1);
+  constructor->SetClassName(String::NewSymbol("Canvas"));
 
-  Local<ObjectTemplate> proto = t->PrototypeTemplate();
-  NODE_SET_PROTOTYPE_METHOD(t, "toBuffer", ToBuffer);
-  NODE_SET_PROTOTYPE_METHOD(t, "streamPNGSync", StreamPNGSync);
+  Local<ObjectTemplate> proto = constructor->PrototypeTemplate();
+  NODE_SET_PROTOTYPE_METHOD(constructor, "toBuffer", ToBuffer);
+  NODE_SET_PROTOTYPE_METHOD(constructor, "streamPNGSync", StreamPNGSync);
   proto->SetAccessor(String::NewSymbol("width"), GetWidth, SetWidth);
   proto->SetAccessor(String::NewSymbol("height"), GetHeight, SetHeight);
-  target->Set(String::NewSymbol("Canvas"), t->GetFunction());
+  target->Set(String::NewSymbol("Canvas"), constructor->GetFunction());
 }
 
 /*

src/Canvas.h

@@ -65,6 +65,7 @@ class Canvas: public node::ObjectWrap {
     inline int stride(){ return cairo_image_surface_get_stride(_surface); }
     Canvas(int width, int height);
     void resurface();
+		static Persistent<FunctionTemplate> constructor;
 
   private:
     ~Canvas();