1  quantize_fs_dither (unsigned width, short *errorptr, int dir)
       2  {
       3    short bpreverr;
       4    unsigned col;
       5    for (col = width; col > 0; col--) 
       6      errorptr += dir;
       7    errorptr[0] = (short) bpreverr;
       8  }
       9  
      10