[tex-live] [Cstugb-l] Re: [Fwd: [Fwd: ec.enc, cork.enc and tcaron]]
zdenek.wagner at gmail.com
Wed Apr 16 12:37:07 CEST 2008
2008/4/16, Vit Zyka <vit.zyka at gmail.com>:
> Hellow Taco and others, please read bellow:
> Taco Hoekwater wrote:
> > Hi Vit,
> > Jim Hefferon wrote:
> > > Please forgive the forward; I don't understand anything about encodings
> > > myself so I can only pass on the report whole. Vit Zyka wrote me the
> > > message below. -------- Forwarded Message --------
> > > From: Vit Zyka <vit.zyka munging gmail.com>
> > > To: ftpmaint munging alan.smcvt.edu
> > > Subject: [Fwd: ec.enc, cork.enc and tcaron]
> > > Date: Mon, 14 Apr 2008 13:12:34 +0200
> > > Dear Jim,
> > >
> > > I do not know who is responsible for a next bug; in the cork.enc file I
> find address <tex-fonts at tug.org> but my mail returned back undelivered. So I
> am sending this bug to you are the CTAN maintainer. Please, might you
> correct it yourself or resent to a responsible person?
> > >
> > > There is wrongly named the glyph 'tcaron' by 'tquoteright' in the files
> > > ec.enc and cork.enc. It is really bug, see e.g.
> > >
> > > Due to the fact the glyph is simply missing using some fonts in the
> > > resulted documents.
> > >
> > ... and may be present in others.
> > Encoding files that are syntactically correct and succeed in creating
> > a PostScript array of length 256 containing names are bugfree when they
> > are used with a font that uses these names to indentify charstrings.
> Yes, Taco, you are right the bug in [ec|cork].enc sould be solved in
> conjunction with the fonts.
> Let as look to the TeX Live 2007 temxmf-dist/fonts directory. Command
> grep -S "tquoteright" *.*
> responds only
> .\afm\ibm\courier\cour.afm:C -1 ; WX 600 ; N tquoteright ; B 73 -14 646 563
> ... next 7 font variant
> .\afm\ibm\times\nntb8a.afm:C -1 ; WX 521 ; N tquoteright ; B 0 -6 493 677 ;
> ... next 7 font variant
> .\enc\dvips\base\cork.enc: /tquoteright /tcedilla /uhungarumlaut /uring
> .\enc\dvips\base\ec.enc: /tquoteright /tcedilla /uhungarumlaut /uring
> .\enc\dvips\base\tex256.enc:/tcaron % 180 % /tquoteright
> 1. tex256.enc has been corrected yet.
> 2. The only fonts that use buggy name are ibm/courier and ibm/times
> Total number of afm files that use tquoteright is 16.
IBM fonts are a bit problematic. They contain both typographically
correct /tquoteright and /tcaron with a shape resembling the old-style
mechanical typewriter. When such a font is installed in an operationg
system as OS/2 or eComStation and Czech or Slovak locale is used, ugly
/tcaron is mapped to the corresponding character and /tquoteright is
> 3. Total number of afm files that use tcaron is 12848(!).
> 4. cork.enc is not used in *.map at all
> 5. ec.enc is used for 611 fonts in *.map
> 6. none of ibm fonts in tfm/ibm/*
> and their variants)
> is present in *.map; so no change for these fonts is needed if
> we correct the enc files.
> 7. Except of missing of \v t in the text, Zdenek Wagner summarized the next
> problems with 'tquoteright':
> > * if afm2tfm or a similar program is asked to generate
> > small caps font by scaling the uppercase characters.
> > When creating small caps /tcaron the program will
> > look for /Tcaron and scale it.
> > * The character has meaning of /tcaron, its Unicode name is
> > LATIN SMALL LETTER T WITH CARON.
> > * when searching PDF or when cutting&pasting the texts
> > from PDF via a clipboard. If /toUnicode map
> > is not inserted, the algorithm relies upon the postscript
> > names and /tcaron is expected here.
> I propose:
> A) rename (for hypothetic use with font like ibm)
> en.enc -> ec-old.enc
> cork.enc -> cork-old.enc
> B) correct glyph name /tquoteright -> /tcaron in
> These steps should not cause any back compatibility problems. Despite this
> if some occurs we will solve it by using *-old.enc in map files or
> discussing the glyph name with the font authors.
> Alternatively, we can create new file ec-correct.enc and to change six
> hundreds lines or so in *.map to point to this new file. I see these
> a) more work, more affected files
> b) confusion for users since there exist manuals that advise to use ec.enc
> file (e.g. afm2tfm, pdftex).
> Preserving on the present encoding vectors is a bug that causes problems to
> users. Please, let us try to solve it.
> Vit Zyka
> > Whether or not these particluar names are used in any font is another
> > matter, and that is why the latin modern fonts come with their own
> > files (lm-ec.enc, I believe). Various fonts use various 'names' for
> > their glyphs, and an .enc file *has to* abide to whatever convention
> > the font designer has chosen.
> > This cork.enc may show buggy behaviour when combined with the font
> > it is tied to in your psfonts.map or pdftex.map (and if that came from
> > texlive, then there is a bug in the map file) but the encoding file
> > itself is still correct even in that case.
> > Hope this helps,
> > Taco
> Ing. Vít Zýka, Ph.D. TYPOkvítek, Czech Republic
> computer vision application aplikace pocitacoveho videni
> database publishing databazove publikovani
> scientific book typesetting sazba odbornych publikaci
> tel.: (+420) 777 198 189 www: http://typokvitek.com
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