ref: 6184a4ef2eba1d49f0386e9ce94f4877d3d9edb2
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}