face_index findex, int cursor_start, int cursor_width,
int cursor_height, int offset_bitmap);
int redisplay_calculate_display_boxes (struct display_line *dl, int xpos,
face_index findex, int cursor_start, int cursor_width,
int cursor_height, int offset_bitmap);
int redisplay_calculate_display_boxes (struct display_line *dl, int xpos,