Render text as a PBM image. See also:
pbmtextps. More information: https://netpbm.sourceforge.net/doc/pbmtext.html.
pbmtext "{{Hello World!}}" > {{path/to/output.pbm}}
echo "{{Hello\nWorld!}}" | pbmtext > {{path/to/output.pbm}}
pbmtext {{[-f|-font]}} {{path/to/font.pbm}} "{{Hello World!}}" > {{path/to/output.pbm}}
echo "{{Hello\nWorld!}}" | pbmtext {{[-s|-space]}} {{3}} {{[-ls|-lspace]}} {{10}} > {{path/to/output.pbm}}