pnm decoding and encoding
| ofs | hex dump | ascii |
|---|---|---|
| 0000 | 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 00 00 00 00 00 00 00 | ................................ |
| 0020 | 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff | ................................ |
| 0040 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 00 00 00 00 00 00 00 00 00 00 00 00 | ................................ |
| 0060 | 00 00 00 00 00 00 ff ff ff 00 ff 00 ff ff ff ff ff 00 ff ff ff ff 00 00 00 00 00 ff 00 00 00 00 | ................................ |
| 0080 | ff 00 ff 00 ff 00 ff 00 00 ff 00 00 00 00 00 ff 00 00 ff 00 ff 00 ff 00 ff 00 ff 00 00 ff 00 00 | ................................ |
| 00a0 | 00 00 00 ff 00 00 ff 00 ff 00 ff 00 ff 00 ff 00 00 ff 00 00 00 00 00 ff 00 00 ff 00 ff 00 ff 00 | ................................ |
| 00c0 | ff 00 ff ff ff ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 00 00 00 00 00 00 | ................................ |
| 00e0 | 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff | ................................ |
| 0100 | ff ff 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 00 00 00 00 00 | ................................ |
| 0120 | 00 00 00 00 00 00 00 00 00 00 00 00 | ............ |