“The Rooftop” (Taiwan) Jay Chou’s musical — a love story between a good-natured hooligan and a proper young woman, and which he directed — may look Baz Luhrmann-inspired with its vivid set pieces, but the pop singer may just as well have been invoking Francis Ford Coppola’s ill-fated 1982 musical “One From the Heart.” This movie isn’t for everyone, but its imaginative movie-studio recreation of a seaside town and lively supporting cast made it a welcome summer treat for the willing.