missing map file "ckx.map"

[strogdon]

First noticed this installing vanilla but it's also present on s-o-g. It may be of no consequence since it is not fatal.

From the build folder /var/tmp/portage/sci-mathematics/sage-doc-9999/work/build_doc/latex/ja/tutorial

# dvipdfmx -o tutorial-jp.pdf tutorial-jp.dvi

dvipdfmx:warning: Couldn't open font map file "ckx.map".
tutorial-jp.dvi -> tutorial-jp.pdf
[1
dvipdfmx:warning: Failed to load ToUnicode mapping: UTF8-UCS2
dvipdfmx:warning: Interpreting special command tounicode (pdf:) failed.
dvipdfmx:warning: >> at page="1" position="(72, 720)" (in PDF)
dvipdfmx:warning: >> xxx "pdf:tounicode UTF8-UCS2"
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702214 bytes written

ckx.map appears in /etc/texmf/dvipdfmx.d/dvipdfmx.cfg:226:f ckx.map but I cannot find the file anywhere. Some distros do include the file but I'm unable to determine its contents.

[kiwifb]

Blast from the past https://trac.sagemath.org/ticket/22252 we are commenting about this very file in there.

[strogdon]

I had noticed that when "googling". Latest on Gentoo is texlive-2021. There is a 2022. Perhaps a correction is available with the newer texlive.

[kiwifb]

I am dubious, some of these map files have a long history of disappearing. Of course it may just need a tweak in the installation procedure for all I know. I am a bit concerned that I cannot find what looks like a source for it from simple googling, which tells me it may be generated.

[kiwifb]

Interestingly it is in the arch linux package https://archlinux.org/packages/extra/any/texlive-core/files/ so yes, may be going to 2022 will improve things. If not, digging for where it originates would be a job.

[strogdon]

If I comment out f ckx.map in dvipdfmx.cfg there is

# dvipdfmx -o tutorial-jp.pdf tutorial-jp.dvi
tutorial-jp.dvi -> tutorial-jp.pdf
[1
dvipdfmx:warning: Failed to load ToUnicode mapping: UTF8-UCS2
dvipdfmx:warning: Interpreting special command tounicode (pdf:) failed.
dvipdfmx:warning: >> at page="1" position="(72, 720)" (in PDF)
dvipdfmx:warning: >> xxx "pdf:tounicode UTF8-UCS2"

No reference to the file. So maybe something deeper.

[strogdon]

Since I don't do Japanese I have no idea if the rendered characters are correct.

[kiwifb]

While I know some japanese, I am not sure I could figure if everything is correct.

[strogdon]

See https://oku.edu.mie-u.ac.jp/~okumura/texfaq/qa/52108.html for possible differences.

[strogdon]

The above is for EUC-UCS2 and not for UTF8-UCS2.

[kiwifb]

I am not sure what to do with it but it all looks legit to me - a mix of Kanji (chinese characters) and hiragana and curiously no katakana (the last two being purely japanese character sets similar to upper and lower case in design but not in usage).

[strogdon]

I believe this is what is not being processed properly

sphinxoptionshyperref.sty:    \AtBeginShipoutFirst{\special{pdf:tounicode UTF8-UCS2}}

[kiwifb]

We are now getting into sphinx - yuck. It looks like a lot of badly documented stuff.

[strogdon]

From what I can find UCS2 is obsolete, although it is mentioned in the current dvipdfmx CTAN documentation. It may just be that sphinxoptionshyperref.sty should be modified to use something other than UTF8-UCS2. For example if I change UCS2 to UTF16 (a close cousin of UCS2) the warning goes away. This is probably nothing to worry about.

[strogdon]

For reference, there are some fonts in tutorial-jp.pdf for which there is no explicit ToUnicode map in the PDF file

name                                 type              encoding         emb sub uni object ID
------------------------------------ ----------------- ---------------- --- --- --- ---------
RQLDDN+TeXGyreHeros-Bold             Type 1C           Custom           yes yes yes      4  0
MRIMFW+HaranoAjiGothic-Medium-Identity-H CID Type 0C       Identity-H       yes yes no       5  0
QGMOGC+TeXGyreHeros-BoldItalic       Type 1C           Custom           yes yes yes      7  0
OXGXUO+TeXGyreTermes-Regular         Type 1C           Custom           yes yes yes     15  0
NIUASB+TeXGyreTermes-Bold            Type 1C           Custom           yes yes yes     16  0
ULCDQB+HaranoAjiMincho-Regular-Identity-H CID Type 0C       Identity-H       yes yes no      18  0
GGYCEQ+CMMI10                        Type 1C           Builtin          yes yes yes     21  0
XWSANK+t1xtt                         Type 1C           Builtin          yes yes no      92  0
ENAOKT+t1xbtt                        Type 1C           Builtin          yes yes yes    101  0
JRNHNA+TeXGyreTermes-Regular         Type 1C           Custom           yes yes yes    112  0
VUFNBZ+CMSY10                        Type 1C           Builtin          yes yes yes    113  0
VEGDEZ+TeXGyreTermes-Italic          Type 1C           Custom           yes yes yes    117  0
QNBHZI+tcxtt                         Type 1C           Builtin          yes yes no     134  0
NWZIPW+CMR10                         Type 1C           Builtin          yes yes yes    160  0
ZRFZGW+CMR7                          Type 1C           Builtin          yes yes yes    161  0
QKTGBS+CMEX10                        Type 1C           Builtin          yes yes yes    165  0
QFARXB+CMMI7                         Type 1C           Builtin          yes yes yes    166  0
TVOBSE+CMR5                          Type 1C           Builtin          yes yes yes    167  0
LOZXWM+CMSY7                         Type 1C           Builtin          yes yes no     168  0
NMPFRV+CMMI5                         Type 1C           Builtin          yes yes no     173  0
NDRZSX+CMSY5                         Type 1C           Builtin          yes yes yes    174  0
FORGAN+NimbusRomNo9L-Regu            Type 1C           Custom           yes yes yes    217  0
NQBPKO+CMBX10                        Type 1C           Builtin          yes yes yes    239  0
OSAFKY+CMMI12                        Type 1C           Builtin          yes yes yes    298  0

[kiwifb]

From what I can find UCS2 is obsolete, although it is mentioned in the current dvipdfmx CTAN documentation. It may just be that sphinxoptionshyperref.sty should be modified to use something other than UTF8-UCS2. For example if I change UCS2 to UTF16 (a close cousin of UCS2) the warning goes away. This is probably nothing to worry about.

Yes, that was the kind of things I found out as well. The style sheet belongs to sphinx, so that could be an issue to raise with them.

[kiwifb]

Is this still happening?

[strogdon]

I don't think it is. I don't see it on vanilla. Now saving the s-o-g doc build log to make sure.

[strogdon]

I see nothing related to this issue now.