Added Gradient constructors

src/gradient.cc

@@ -29,6 +29,8 @@ Gradient::New(const Arguments &args) {
       , args[1]->NumberValue()
       , args[2]->NumberValue()
       , args[3]->NumberValue());
+    grad->Wrap(args.This());
+    return args.This();
   }
 
   // Radial
@@ -45,4 +47,14 @@ Gradient::New(const Arguments &args) {
   }
   
   return ThrowException(Exception::TypeError(String::New("invalid arguments")));
-}
+}
+
+Gradient::Gradient(double x0, double y0, double x1, double y1):
+  _x0(x0), _y0(y0), _x1(x1), _y1(y1) {
+  _grad = cairo_pattern_create_linear(x0, y0, x1, y1);
+}
+
+Gradient::Gradient(double x0, double y0, double r0, double x1, double y1, double r1):
+  _x0(x0), _y0(y0), _x1(x1), _y1(y1), _r0(r0), _r1(r1) {
+  _grad = cairo_pattern_create_radial(x0, y0, r0, x1, y1, r1);
+}

src/gradient.h

@@ -16,13 +16,12 @@ class Gradient: public node::ObjectWrap {
   public:
     static void Initialize(Handle<Object> target);
     static Handle<Value> New(const Arguments &args);
-    Gradient(double x0, double y0, double x1, double y1):
-      _x0(x0), _y0(y0), _x1(x1), _y1(y1) {};
-    Gradient(double x0, double y0, double r0, double x1, double y1, double r1):
-      _x0(x0), _y0(y0), _x1(x1), _y1(y1), _r0(r0), _r1(r1) {};
+    Gradient(double x0, double y0, double x1, double y1);
+    Gradient(double x0, double y0, double r0, double x1, double y1, double r1);
 
   private:
     double _x0, _y0, _x1, _y1, _r0, _r1;
+    cairo_pattern_t *_grad;
 };
 
 #endif