genpng(1) on Linux
The text d318341f4cb8, as Debian 10 (Buster), Debian 9 (Stretch) shipped it.
Generate an overview image from a source file
Flags it lists
-
--help -
--output-filename -
--tab-size -
--version -
--width -
-h -
-o -
-t -
-v -
-w