pbmtextps
Render text as a PBM image using PostScript.
TLDR
Render a single line of text as a PBM image
$ pbmtextps "[Hello World!]" > [path/to/output.pbm]
Specify the font and font size
$ pbmtextps -font [Times-Roman] -fontsize [30] "[Hello World!]" > [path/to/output.pbm]
Specify the desired left and top margins
$ pbmtextps -leftmargin [70] -topmargin [162] "[Hello World!]" > [path/to/output.pbm]
Do not output the rendered text as a PBM image, but a PostScript program that would create this image
$ pbmtextps -dump-ps "[Hello World!]" > [path/to/output.ps]