pnm decoding and encoding
| ofs | hex dump | ascii |
|---|---|---|
| 0000 | 50 37 0a 57 49 44 54 48 20 32 30 0a 48 45 49 47 48 54 20 31 35 0a 44 45 50 54 48 20 31 0a 4d 41 | P7.WIDTH.20.HEIGHT.15.DEPTH.1.MA |
| 0020 | 58 56 41 4c 20 32 35 35 0a 54 55 50 4c 54 59 50 45 20 42 4c 41 43 4b 41 4e 44 57 48 49 54 45 0a | XVAL.255.TUPLTYPE.BLACKANDWHITE. |
| 0040 | 45 4e 44 48 44 52 0a 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ENDHDR.......................... |
| 0060 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 01 01 01 00 00 00 00 00 00 00 00 00 00 | ................................ |
| 0080 | 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 | ................................ |
| 00a0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 01 01 01 00 01 00 01 01 01 01 01 00 01 01 01 01 00 00 00 | ................................ |
| 00c0 | 00 00 01 00 00 00 00 01 00 01 00 01 00 01 00 00 01 00 00 00 00 00 01 00 00 01 00 01 00 01 00 01 | ................................ |
| 00e0 | 00 01 00 00 01 00 00 00 00 00 01 00 00 01 00 01 00 01 00 01 00 01 00 00 01 00 00 00 00 00 01 00 | ................................ |
| 0100 | 00 01 00 01 00 01 00 01 00 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................................ |
| 0120 | 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 | ................................ |
| 0140 | 00 00 00 00 00 01 01 01 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................................ |
| 0160 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | ................... |