lispmtopgm
converts Lisp Machine bitmap format to PGM grayscale
TLDR
Convert Lisp Machine bitmap to PGM
$ lispmtopgm [input.lispm] > [output.pgm]
Read from stdin$ cat [input.lispm] | lispmtopgm > [output.pgm]
SYNOPSIS
lispmtopgm [lispmfile]
DESCRIPTION
lispmtopgm converts a Lisp Machine bitmap file into a PGM (Portable Graymap) image. It reads bitmaps written by the `tv:write-bit-array-file` function on TI Explorer and Symbolics Lisp Machines.Multi-plane Lisp Machine bitmaps are inherently color, but because the file format lacks a color map the output is produced as grayscale PGM. If no input file is given, the bitmap is read from standard input.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm
CAVEATS
The Lisp Machine format normally pads image width up to the next multiple of 32 pixels, but not always. Files with non-32-aligned widths may be up to 7 bits too short and are not handled gracefully. No tool-specific options exist; only standard libnetpbm options apply.
SEE ALSO
pgmtolispm(1), pbmtolj(1)
