Added Canvas::data() and Canvas::stride()

src/Canvas.h

@@ -60,6 +60,8 @@ class Canvas: public node::ObjectWrap {
     static Handle<Value> StreamPNGSync(const Arguments &args);
     static Local<Value> Error(cairo_status_t status);
     inline cairo_surface_t *surface(){ return _surface; }
+    inline uint8_t *data(){ return cairo_image_surface_get_data(_surface); }
+    inline int stride(){ return cairo_image_surface_get_stride(_surface); }
     Canvas(int width, int height);
     void resurface();
 

src/CanvasRenderingContext2d.cc

@@ -408,8 +408,10 @@ Context2d::DrawImage(const Arguments &args) {
   double dh = args[4]->IsNumber() ? args[4]->NumberValue() : img->height;
 
   // Draw
-  uint8_t *src = img->data();
   cairo_t *ctx = context->context();
+  uint8_t *dst = context->canvas()->data();
+  uint8_t *src = img->data();
+  int stride = img->stride();
 
   return Undefined();
 }

src/Image.h

@@ -32,6 +32,7 @@ class Image: public node::ObjectWrap {
     static void SetOnerror(Local<String> prop, Local<Value> val, const AccessorInfo &info);
     inline cairo_surface_t *surface(){ return _surface; } 
     inline uint8_t *data(){ return cairo_image_surface_get_data(_surface); } 
+    inline int stride(){ return cairo_image_surface_get_stride(_surface); } 
     cairo_status_t loadSurface();
     void error(Local<Value>);
     void loaded();