[XeTeX] How to add ExtGState to xdvipdfmx?

[Zdenek Wagner]

Hello,

I have an ExtGState defined as:

  \special{pdf: object @opoff << /Type /ExtGState /op false /OP false /OPM 0 >>}
  \special{pdf: object @opon << /Type /ExtGState /op true /OP true /OPM 1 >>}
  \special{pdf: object @extgs << /GSko @opoff /GSop @opon >>}
  \special{pdf: object @ExtGS << /ExtGState @extgs >>}

These commands go to the PDF exactly as in a pdftex file which works.
Now I need to define @ExtGS in /Resources at each page where I use
/GSko or /GSop. I tried several ways but all seem to be wrong, it was
not written to the PDF file. Can someone write me how to do it?

Thanks in advance

-- 
Zdeněk Wagner
http://hroch486.icpf.cas.cz/wagner/
http://icebearsoft.euweb.cz