[pdftex] pdftex - Encoding for metafont PK fonts

[Pali Rohár]

On Sunday 26 June 2016 22:56:40 Pali Rohár wrote:
> On Sunday 26 June 2016 13:35:22 Pali Rohár wrote:
> > On Sunday 26 June 2016 07:54:19 Reinhard Kotucha wrote:
> > > On 2016-06-25 at 22:56:48 +0000, Ross Moore wrote:
> > >  > But it is pity that it is not possible to specify that enc
> > >  > file also for PK fonts generated by MetaFont. Or it is
> > >  > somehow possible?
> > >  > 
> > >  > I see no reason why not, but could easily be wrong.
> > >  > But I must admit that I’ve not tried it with a PK font.
> > > 
> > > Dear Ross,
> > > I assume that the main problem is that Metafont is using
> > > numerical glyph indices but in order to re-encode a font, it's
> > > required that each glyph has a name.
> > 
> > Yes! And that glyph name for each numberical value (index) is
> > available in encode file (csr.enc). This is reason why I'm tryint
> > to tell pdftex:
> > 
> > "hey pdftex, please use csr.enc for my csb12 PK font, it contains
> > mapping index --> glyph name which you need to building cmap file"
> 
> Ok, it is really not possible with pdftex. I looked into pdftex
> source code and code for writing PK & Type 3 fonts in PDFtex does
> not use encoding vectors...
> 
> Also code for loading mapfile cannot be used for PK fonts (checker
> refuse it).
> 
> I looked deeply how pdftex working with Type 3 and PK fonts and
> created small patch which adds support for generating /ToUnicode
> object (from \pdfglyphtounicode table) and which allows to load enc
> file also PK fonts.
> 
> Patch was created against pdftex in TeXLive 2012 (which is on my
> system), but is really small and should be very easy to rewrite/apply
> it on new versions.
> 
> Patch pdftex-pkfonts-encfile-tounicode.patch is attached.
> 
> Let me know what do you think about it and if it can be added to
> pdftex project.

Ops, in patch from previous email is small problem with indexes and 
notdef. Fixed in new attached pdftex-pkfonts-encfile-tounicode-v2.patch

-- 
Pali Rohár
pali.rohar at gmail.com
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