in order to just initialize the buffer, and not flush it.}
\docparam{area}{The size of the bitmap to be used for buffering (this bitmap is
-created internally when it is not given explicitely).}
+created internally when it is not given explicitly).}
\docparam{buffer}{Explicitly provided bitmap to be used for buffering: this is
the most efficient solution as the bitmap doesn't have to be recreated each