Hallmark Christmas movies, and I’ve always enjoyed Macfarlane’s work as a charming romantic lead in them, but “Bros” offers the kind of complexity and shading (to say nothing of humor) that Hallmark never could. Anyone coming into this film only knowing Macfarlane for his cozy cable movies will leave with a new appreciation of this versatile actor’s wheelhouse.Cinematographer Brandon Trost (“Can You Ever Forgive Me?”) bathes the film in a romantic-comedy glow, whether Bobby and Aaron are falling for each other in Manhattan or in Provincetown, and overall, “Bros” harkens back to old-school rom-coms and their more recent iterations.