blc=101 %24bit
expand_px = [20, 18, 12, 19, 18, 17, 14, 13, 20, 19, 15, 13, 21, 19, 17, 14, 16, 15, 12, 17, 15, 13, 18, 15, 18, 17, 16, 15, 14, 12, 19, 18, 16, 14, 12, 20, 18, 17, 15, 14, 12, 17, 16, 18, 16, 13, 19, 15, 14, 19, 18, 17, 16, 12, 20, 19, 16, 15, 14, 12, 21, 19, 18, 14];
expand_y = [407, 509, 511, 795, 938, 1009, 1018, 1023, 1688, 2021, 2041, 2047, 3598, 3985, 4082, 4095, 6716, 8027, 8191, 14432, 15992, 16383, 30946, 32767, 49544, 57932, 62127, 64224, 65272, 65535, 104918, 124609, 129532, 130763, 131071, 223000, 245983, 257474, 260347, 261783, 262143, 436905, 524287, 933487, 1035787, 1048575, 2007273, 2067191, 2097151, 3210991, 3767911, 4046371, 4185601, 4194303, 6794162, 8094091, 8256582, 8337828, 8378451, 8388607, 14454944, 15971529, 16729821, 16777215];