Forbidden Forest looked as though it had been enchanted, each tree smattered with silver, and Hagrid's cabin looked like an iced cake.
I looked up the word 'smatter':
To speak (a language) without fluency: smatters Russian.
To study or approach superficially; dabble in.
To prattle: smattered on about her vacation.
None of them seem to fit for the context. What does it truly mean here?