- dev-luatex - NTG Mailing Lists

Re: [Dev-luatex] bug 345: Kerning is not perfect in math mode
by c.a.rowley＠open.ac.uk 13 Mar '10

13 Mar '10

Since I do not seem to have access to this: http://tracker.luatex.org/view.php?id=345 I am not quite sure what you are tryinng to hack. It appears to be something to do with the 2nd plane math characters (something I have gone around many times on the MathML group). One major problem is that these character slot repertoires are incomplete in incompatible ways but that may not affect what you are doing here. I would have thought that when using 'standard tex-like input' and tex-like processing there are a lot of arbitrary decisions to be made. It seems unlikely that an assumption about catcodes is a good solution: but neither are catcodes in the first place and making assumptions about 'math fonts' was no better. So why not replace one set-up assumption by another? other useful(??) questions are: what would the catcode of this bizarre set of math slots be? More relevant: What exactly is the spec for how you want these things to behave in a world of large fonts and character sets? What does 'compatibility' mean when this new world is opened-up? chris --------------------------------------------------------------------------- The Open University is incorporated by Royal Charter (RC 000391), an exempt charity in England & Wales and a charity registered in Scotland (SC 038302)

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svn: OPTIONS of 'http://scm.foundry.supelec.fr/svn/luatex': 200 OK (http://scm.foundry.supelec.fr)
by Martin Schröder 13 Mar '10

13 Mar '10

> LANG=C svn up svn: OPTIONS of 'http://scm.foundry.supelec.fr/svn/luatex': 200 OK (http://scm.foundry.supelec.fr) > LANG=C svn info . Path: . URL: http://scm.foundry.supelec.fr/svn/luatex Repository Root: http://scm.foundry.supelec.fr/svn/luatex Repository UUID: 0b2b3880-5936-4365-a048-eb17d2e5a6bf Revision: 3440 Node Kind: directory Schedule: normal Depth: immediates Last Changed Author: taco Last Changed Rev: 3440 Last Changed Date: 2010-02-21 18:18:29 +0100 (Sun, 21 Feb 2010)

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 13 Mar '10

13 Mar '10

------------------------------------------------------------------------ r3482 | taco | 2010-03-13 12:18:28 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/luafont.c M /trunk/source/texk/web2c/luatexdir/font/texfont.h add a new font key: units_per_em (defaults to 0 == unknown) ------------------------------------------------------------------------ r3483 | taco | 2010-03-13 12:33:16 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex documented pending removal of tex.wd, tex.ht and tex.dp ------------------------------------------------------------------------ r3484 | hhenkel | 2010-03-13 12:54:15 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfglyph.c mantis bug 0000200 fix (incomplete yet) ------------------------------------------------------------------------ r3485 | hhenkel | 2010-03-13 13:03:29 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/writecff.c mantis bug 0000200 fix attempt (yet needs context adaption) ------------------------------------------------------------------------ r3486 | hhenkel | 2010-03-13 14:19:18 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/writecff.c M /trunk/source/texk/web2c/luatexdir/pdf/pdfglyph.c still mantis bug 0000200; fix was wrong for Truetype fonts ------------------------------------------------------------------------ r3487 | hhenkel | 2010-03-13 15:26:16 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/writecff.c simplify bugfix ------------------------------------------------------------------------ r3488 | hhenkel | 2010-03-13 15:39:15 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/writecff.c fix wasn't rugged against array overflow ------------------------------------------------------------------------

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bug 345: Kerning is not perfect in math mode
by Taco Hoekwater 13 Mar '10

13 Mar '10

Hi, See http://tracker.luatex.org/view.php?id=345 I've tried to fix this by checking the \catcode of the current character for 'new math fons' instead of relying on the font's space() fontdimen like TeX82 does. This fix is based on the assumption that the 'high numbers' won't have \catcode 11, so that only the low upright alphabetic characters will have the italic correction stripped, and those are exactly the ones we want to reach in 'typical' new math input: this nicely covers operators that have 'names' like \sin, and any other uses of \rm in math mode. The downside is that this fix will break stuff like $ A {\it forces} B $ but I see no way to tackle that automatically. Best wishes, Taco

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 13 Mar '10

13 Mar '10

------------------------------------------------------------------------ r3480 | taco | 2010-03-13 11:48:45 +0100 (Sat, 13 Mar 2010) | 5 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/tex/mlist.c an attempt at a fix for bug 345: when the current math font is a new math font, check against \catcode <cur_c> == 11 to suppress the italic correction, instead of looking at the value of space(<cur_f>). ------------------------------------------------------------------------ r3481 | taco | 2010-03-13 11:50:25 +0100 (Sat, 13 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/tex/mlist.c previous commit left a debug print statement in ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 12 Mar '10

12 Mar '10

------------------------------------------------------------------------ r3479 | oneiros | 2010-03-12 17:32:35 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfpage.c indent ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 12 Mar '10

12 Mar '10

------------------------------------------------------------------------ r3473 | taco | 2010-03-12 13:30:01 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/lua/lkpselib.c implement and document kpse.lookup() ------------------------------------------------------------------------ r3474 | taco | 2010-03-12 13:38:14 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/lua/lkpselib.c implement and document kpse.version() ------------------------------------------------------------------------ r3475 | taco | 2010-03-12 14:36:30 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c implement tex.shipout() ------------------------------------------------------------------------ r3476 | taco | 2010-03-12 14:58:06 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.pdf regenerated manual ------------------------------------------------------------------------ r3477 | taco | 2010-03-12 14:59:34 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/luafont.c M /trunk/source/texk/web2c/luatexdir/font/writecff.c M /trunk/source/texk/web2c/luatexdir/font/writet1.c M /trunk/source/texk/web2c/luatexdir/lua/lfontlib.c M /trunk/source/texk/web2c/luatexdir/lua/lkpselib.c M /trunk/source/texk/web2c/luatexdir/lua/lnodelib.c M /trunk/source/texk/web2c/luatexdir/lua/loslibext.c M /trunk/source/texk/web2c/luatexdir/lua/lstatslib.c M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c M /trunk/source/texk/web2c/luatexdir/lua/luainit.c M /trunk/source/texk/web2c/luatexdir/tex/align.c M /trunk/source/texk/web2c/luatexdir/tex/arithmetic.c M /trunk/source/texk/web2c/luatexdir/tex/arithmetic.h M /trunk/source/texk/web2c/luatexdir/tex/buildpage.c M /trunk/source/texk/web2c/luatexdir/tex/nesting.c M /trunk/source/texk/web2c/luatexdir/tex/nesting.h M /trunk/source/texk/web2c/luatexdir/tex/postlinebreak.c M /trunk/source/texk/web2c/luatexdir/tex/printing.c M /trunk/source/texk/web2c/luatexdir/tex/scanning.c M /trunk/source/texk/web2c/luatexdir/tex/texnodes.c M /trunk/source/texk/web2c/luatexdir/tex/texnodes.h indent ------------------------------------------------------------------------ r3478 | taco | 2010-03-12 15:01:05 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: A /tags/beta-0.51.0 (from /trunk:3477) new tag ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 12 Mar '10

12 Mar '10

------------------------------------------------------------------------ r3468 | taco | 2010-03-12 09:22:16 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/lfontlib.c dont ignore the return value of font_to_lua() ------------------------------------------------------------------------ r3469 | taco | 2010-03-12 09:37:54 +0100 (Fri, 12 Mar 2010) | 3 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/luafont.c dont use the global Lua state in define_font, because font_to_lua() may be called from a coroutine (with its own lua) ------------------------------------------------------------------------ r3470 | taco | 2010-03-12 09:45:40 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex document font.cache / coroutines interference ------------------------------------------------------------------------ r3471 | taco | 2010-03-12 10:17:38 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex add a few stability remarks ------------------------------------------------------------------------ r3472 | taco | 2010-03-12 10:51:20 +0100 (Fri, 12 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/luafilesystem/src/lfs.c add lfs.shortname() and document lfs.shortname() and lfs.readlink() ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 11 Mar '10

11 Mar '10

------------------------------------------------------------------------ r3466 | taco | 2010-03-11 11:50:35 +0100 (Thu, 11 Mar 2010) | 3 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c fix a nesting level bug in tex.linebreak, and add support for 'parshape' ------------------------------------------------------------------------ r3467 | taco | 2010-03-11 11:59:30 +0100 (Thu, 11 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c flush the parshape node ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 09 Mar '10

09 Mar '10

------------------------------------------------------------------------ r3463 | taco | 2010-03-09 16:44:32 +0100 (Tue, 09 Mar 2010) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/tex/nesting.c simplify this source file a bit ------------------------------------------------------------------------ r3464 | taco | 2010-03-09 16:47:00 +0100 (Tue, 09 Mar 2010) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c implement a lua interface to the semantic nesting levels ------------------------------------------------------------------------ r3465 | taco | 2010-03-09 17:10:20 +0100 (Tue, 09 Mar 2010) | 3 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/ltexlib.c fix uninitialized parameters being used with there is no second argument to tex.linebreak. (spotted by Martin) ------------------------------------------------------------------------

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