> What is the prerequisite for gererating a pdf file with chinese
> characters can be copied and pasted?
`ToUnicode' dictionaries for all (sub)fonts within the PDF file.
> I found when I use the dvipdfmx, both the type1 chinese character
> and truetype chinese character can be copied and pasted; when I use
> the pdflatex to work with TrueType fonts, I can't copy and paster
> them, why?
dvipdfmx generates ToUnicode dictionaries automatically, but pdftex
doesn't do that (yet). Instead, you have to use Vladimir Volovich's
`cmap.sty', providing proper mapping files for all subfonts of an
encoding. Below you can find a sample cmap file (c1017.cmap) for
subfont 17 of the C10 encoding (GB 2312) -- it is incomplete and
contains just the value for a single character. Because dvipdfmx
works just fine I was always too lazy to write proper scripts which
create such cmap files automatically from SFD files. Volunteers
welcome.
Here a sample input file for pdftex which uses just this single
character:
\documentclass{article}
\usepackage{CJK}
\usepackage{cmap}
\usepackage[T1]{fontenc}
\begin{document}
blablabla
\begin{CJK}{GB}{gbsn}
\hbox{^^ce^^ce}
\end{CJK}
\end{document}
Werner
======================================================================
%!PS-Adobe-3.0 Resource-CMap
%%DocumentNeededResources: ProcSet (CIDInit)
%%IncludeResource: ProcSet (CIDInit)
%%BeginResource: CMap (TeX-C10-17-0)
%%Title: (TeX-C10-17-0 TeX C10-17 0)
%%Version: 1.000
%%EndComments
/CIDInit /ProcSet findresource begin
12 dict begin
begincmap
/CIDSystemInfo
<< /Registry (TeX)
/Ordering (C10-17)
/Supplement 0
>> def
/CMapName /TeX-C10-17-0 def
/CMapType 2 def
1 begincodespacerange
<00> <FF>
endcodespacerange
1 beginbfchar
<B3> <631D>
endbfchar
endcmap
CMapName currentdict /CMap defineresource pop
end
end
%%EndResource
%%EOF
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