Memory leak of RefPtr?

["Rose Cumming" <rose_alice_cumming hotmail com>]

Hello,

I'm not familiar with smart pointer. I'm just wondering will the following 
code cause memory leak?

For example,

in my class, I have a member variable

Glib::RefPtr<Gdk::Pixbuf> viewBuffer_;

in the constructor of this class I do this,

viewBuffer_ = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, false, 8, 100, 100);

in a member function of this class I do this,

void draw()
{
  Glib::RefPtr<Gdk::Pixbuf> *buffer;
  someObjectPointer_->getImage(&buffer);
  viewBuffer_ = (*buffer)->scale_simple(100,100,Gdk::INTERP_BILINEAR);
}

Say draw is called somewhere in my application.
An only one object of this class is kept in my application.

The question is, will this
viewBuffer_ = (*buffer)->scale_simple(100,100,Gdk::INTERP_BILINEAR);
cause memory leak?

Or there're "better" (proper) way to unref the smart pointer or something?

Thank you
Rose

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