🚀 go-pugleaf

>So I will just test if the image is RGB or CMYK and then use the proper colorspace.

That is best. *IF* you are working in the area of colour management
and want to use a color manager to do profile-to-profile conversion,
you may get better results. This is a much bigger project than the one
you describe. You would probably want to use CIEBasedABC or
CIEBasedDEFG colors too, a world of pain.
>
>1. How can I write Unicode characters in a PostScript file?

You can put any characters or bytes you like in a string, but that
won't make PostScript understand Unicode. (The PS Language Reference
doesn't mention Unicode, not because it is implicit, but because it
isn't there).

To display characters in a font you have to choose a suitable font
that contains the character set you want to show, set up an encoding
to map string byte values into characters, and generate the string
accordingly. Mostly people use single byte fonts, and may partition
into character sets, switching fonts as needed. There is NO universal
Unicode font - and if there was it would add tens of megabytes to the
PostScript.
>
>2.How can I define a new font in the PostScript file? 

I suspect you are about to enter a world of pain. What do you mean by
a "new font"?  What is the overall requirement here - to allow someone
or something to select operating system fonts and print with them? Or
just to pick a font from those built into the printer?


Aandi Inston