pnmtopclxl
Convert a PNM file to an HP LaserJet PCL XL printer stream.
TLDR
Convert PNM files to an HP LaserJet PCL XL printer stream
$ pnmtopclxl [path/to/input1.pnm path/to/input2.pnm ...] > [path/to/output.pclxl]
Specify the resolution of the image as well as the location of the page from the upper left corner of each image
$ pnmtopclxl -dpi [resolution] -xoffs [x_offset] -yoffs [y_offset] [path/to/input1.pnm path/to/input2.pnm ...] > [path/to/output.pclxl]
Generate a duplex printer stream for the specified paper format
$ pnmtopclxl -duplex [vertical|horizontal] -format [letter|legal|a3|a4|a5|...] [path/to/input1.pnm path/to/input2.pnm ...] > [path/to/output.pclxl]