Re: CMAP and IL2 encoding

[Vit Zyka <vit.zyka@seznam.cz>]

Some auto-answers ;-)

Add 1: I thing the answer is waiting only for Hans.
Add 2: il2 name is all right for encoding of csr fonts in ConTeXt.
        I was confused of what is called il2. il2 in TeX world is
        encoding of CS fonts (csr). Do not confuse with ISO-8859-2 so
        called Latin 2.
        Never mind, in enco-il2.tex are still missing some
        not-so-important chars.
Add 3: Definition of pdfr-il2.tex (CMAP) is for ISO-8859-2 fonts so it
        is not suited for csr font (I believe it was the first [and
        perhaps last also] intention).
Add 4: Decision for ConTeXt developers(?) According to the decision I
        can prepare the CMAP files for il2, xl2, cp1250, and ISO-8859-2
        encodings.

Vit Zyka

> I played with ToUnicode resource (for correct copy&paste and search 
> opperation in PDF). I noticed a package cmap.sty was done by Mr. 
> Volovich for LaTeX a year ago; I did one (cmap.tex) for plain TeX 
> yesterday and started to be interested in the situation in ConTeXt. No 
> wonder you did it 4 years ago. But I met some minor problems:
> 
> 1) if you run example file
>     \useencoding[pfr]
>     \setupbodyfont[csr]
> 
>     \starttext
>       test \`z \'z \bf test \sl test \bs quite funny \`z \page
>       test \`z \'z \bf test \sl test \bs quite funny \`z \page
>     \stoptext
>   you obtain /ToUnicode resource ONLY for first roman variant. It is due
>   to a condition in the file enco-pfr.tex
>     \def\doincludepdffontresource
>      {\ifcsname\s!ucmap\fontfile\endcsname\else
>         \dodoincludepdffontresource
>       \fi}
>   The condition is correct but the \fontfile is not changed when \bf,
>   \it, etc. is used (it is still cscsc10 (?)).
> 
>   Might you look at a proper \fontfile definition?
> 
> 2) Technical note: in ConTeXt the il2 encoding is defined. But the
>    definition is not ISO-8859-2 (Latin 2, IL2) encoding sharp. The
>    definition is CS font encoding (IL2cs or 8z). It is derived from il2
>    but it differ in 49 positions (!). For
>    usage in Czech or Slovac languages it causes no problem but what if
>    somebody will want to use a proper il2 font?
>    If you want I can prepare
>    both IL2 and (a bit richer) il2cs (8z?) enco-??.tex files.
> 
> 3) File pdfr-il2.tex with CMAP definition is proper IL2 mapping. So now
>    we combine IL2 CMAP mapping with IL2cs ConTeXt encoding. It is
>    nosence. Suggested solution: use csr fonts with new IL2cs encoding
>    and create new pdfr-il2cs.tex.
> 
> 4) Definitions of CMAP encodings are stored in pdfr-??.tex files - it
>    means in TeX format. But the common way is to be a stand-alone PS
>    file, see attachement. Now I know about 5 files from Mr. Volovich
>    (Cork, 3 russian, vietnamese) and two from me (IL2, IL2cs). Such file
>    can be easily included by \pdfobj stream file {} mechanism.
>    Question: I can prepare pdfr-il2cs.tex but is it not better to
>    use more standard stand-alone files in ConTeXt?
> 
> Vit Zyka

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