read_bitmap_file/[2,3,4,5]

     read_bitmap_file(+Filename, -Pixmap)
     read_bitmap_file(+Filename, -Pixmap, -X_hot, -Y_hot)
     read_bitmap_file(+Filename, +Screen, -Pixmap)
     read_bitmap_file(+Filename, +Screen, -Pixmap, -X_hot, -Y_hot)
     

Pixmap is the bitmap encoded in file Filename. If Screen is supplied, it is Pixmap's screen, if not it defaults to the default screen. If X_hot and Y_hot are asked for, they are the X and Y components of Pixmap's hotspot, if it is specified in the file, and -1 if not specified in the file.