node-opencv/src/Point.cc

#include "Point.h"
#include "OpenCV.h"

v8::Persistent<FunctionTemplate> Point::constructor;

void Point::Init(Handle<Object> target) {
  NanScope();

  // Constructor
  Local<FunctionTemplate> ctor = NanNew<FunctionTemplate>(Point::New);
  NanAssignPersistent(constructor, ctor);
  ctor->InstanceTemplate()->SetInternalFieldCount(1);
  ctor->SetClassName(NanNew("Point"));

  // Prototype
  Local<ObjectTemplate> proto = ctor->PrototypeTemplate();
  proto->SetAccessor(NanNew("x"), GetX, RaiseImmutable);
  proto->SetAccessor(NanNew("y"), GetY, RaiseImmutable);

  NODE_SET_PROTOTYPE_METHOD(ctor, "dot", Dot);

  target->Set(NanNew("Point"), ctor->GetFunction());
};

NAN_METHOD(Point::New) {
  NanScope();

  if (args.This()->InternalFieldCount() == 0) {
    return NanThrowTypeError("Cannot Instantiate without new");
  }

  double x = 0, y = 0;
  if (args[0]->IsNumber()) {
    x = args[0]->NumberValue();
  }
  if (args[1]->IsNumber()) {
    y = args[1]->NumberValue();
  }
  Point *pt = new Point(x, y);
  pt->Wrap(args.This());
  NanReturnValue(args.This());
}

NAN_GETTER(Point::GetX) {
  NanScope();
  Point *pt = ObjectWrap::Unwrap<Point>(args.This());
  NanReturnValue(NanNew<Number>(pt->point.x));
}

NAN_GETTER(Point::GetY) {
  NanScope();
  Point *pt = ObjectWrap::Unwrap<Point>(args.This());
  NanReturnValue(NanNew<Number>(pt->point.y));
}

NAN_SETTER(Point::RaiseImmutable) {
  NanThrowTypeError("Point is immutable");
}

NAN_METHOD(Point::Dot) {
  NanScope();
  Point *p1 = ObjectWrap::Unwrap<Point>(args.This());
  Point *p2 = ObjectWrap::Unwrap<Point>(args[0]->ToObject());

  // Since V 2.3 Native Dot no longer supported
  NanReturnValue(NanNew<Number>(p1->point.x * p2->point.x + p1->point.y * p2->point.y));
}

Point::Point(double x, double y) :
    ObjectWrap() {
  point = cvPoint2D32f(x, y);
}