ref: 0273db0792a23d9f2e2c50a2dbcb599e05b6ea3f
dir: /sys/src/cmd/gs/lib/ras8m.upp/
-supModel="SUN rasterfile, 8 Bit, 2 Colors (Error-Diffusion)"
-sDEVICE=uniprint
-dNOPAUSE
-dSAFER
-dupColorModel=/DeviceGray
-dupRendering=/ErrorDiffusion
-dupOutputFormat=/SunRaster
-dupComponentBits={8}