LBM Support
As the final step of the recovering the sprite sheets files, I have to encode them as LBMs.
The LBM format was the PNG of 80ies and 90ies.
Yet only a few modern programs support loading it.
I.e. GIMP doesn't support it.

XnView supports them, but the loader is broken.
At first I thought there is an issue with my code.
But nope, Deluxe Paint loads my LBMs just fine.
In any case, I have still to recover one font file.
That one was prepared using rather involved process,
following the markers.