ref: cde4b93a27af60da423b3ed387de5f7a31ba32b7
dir: /sys/src/cmd/gs/lib/ras32.upp/
-supModel="SUN rasterfile, 32 Bit, 6+1 Colors (CMYK-Error-Diffusion)" -sDEVICE=uniprint -dNOPAUSE -dSAFER -dupColorModel=/DeviceCMYK -dupRendering=/ErrorDiffusion -dupOutputFormat=/SunRaster