Yes, the idea to use a cursor rectangle instead of [NSCursor set] has occurred
to me too, and it does seem to be the most elegant way. Here's my attempt at an
implementation

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402535