- dev-luatex - NTG Mailing Lists

Proposal for a change in otfl-luat-dum.lua
by Beingalink 21 Feb '11

21 Feb '11

To be able to use fonts inside a dfont archive (Helvetica for example) I had to change line 59 in otfl-luat-dum.lua to " dfont = "truetype fonts",". When I updated my mactex 2010 installation a few days ago, the file got overwritten and I had to do the change again. I'm not sure if there is a better/cleaner solution but since this small change works for me, this could at least be used as a temporary fix.

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mediabox accuracy
by Peter Rolf 19 Feb '11

19 Feb '11

Hi, I have a preflighting problem caused by a badly rounded (too small) mediabox. This following snippet is taken from that pdf. 93 0 obj << /Type /Page /Contents 94 0 R /Resources 92 0 R /MediaBox [0 0 923.24 585.99] /TrimBox [ 0.0000 0.0000 923.2440 585.9925 ] /CropBox [ 0.0000 0.0000 923.2440 585.9925 ] /Parent 98 0 R >> The mediabox accuracy is swayed by \pdfdecimaldigits (here \pdfdecimaldigits=2), while the other boxes use a fixed accuracy (four points after the digit). I see two solutions: 1. use the same fixed accuracy for all boxes 2. use the same accuracy given by \pdfdecimaldigits for all boxes I guess the second solution can still cause problems due to runtime changes of \pdfdecimaldigits (unless this is a 'write once' register) Test file (ConTeXt) is attached. Tested with trunk beta-0.65.0-2011010308 (rev 4050) and beta-0.66.0-2011021618 (rev 4086) on Windows Vista. Peter

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Re: [Dev-luatex] mkiv/metapost torture test
by Hans Hagen 12 Feb '11

12 Feb '11

On 12-2-2011 11:27, Mojca Miklavec wrote: > I forced \stoptext around line 5688 since it consumes all the > available memory (approximately 3 GB) and then takes forever to > proceed any further. You can try to remove those 10 lines and try to > compile the whole document in case it succeds. all these bytes go into the tex parser and get tokenized (which takes mem) and then stringified again when passed to mp etc etc how about using a temp file for > 5K data .. i can provide a function for reading that in directly i'll play a bit more with it later Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------

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

10 Feb '11

------------------------------------------------------------------------ r4084 | taco | 2011-02-10 10:06:29 +0100 (Thu, 10 Feb 2011) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/lua/llfslibext.c fix bug 549 + re-indent ------------------------------------------------------------------------ r4085 | taco | 2011-02-10 10:21:57 +0100 (Thu, 10 Feb 2011) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/tex/scanning.h fix bug 547 ------------------------------------------------------------------------ r4086 | taco | 2011-02-10 10:25:30 +0100 (Thu, 10 Feb 2011) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/source/texk/web2c/luatexdir/font/luafont.w fix bug #548 ------------------------------------------------------------------------

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Problem using dfont fonts with lualatex (Mactex)
by Beingalink 10 Feb '11

10 Feb '11

I get following error message: ----------------------------------------------------------------------------------------------------------- ! LuaTeX error ...0/texmf-dist/tex/luatex/luaotfload/otfl-luat-dum.lua:67: bad argument #2 to 'find_file' (invalid option 'truetype dictionary'). <to be read again> \scan_stop: l.112 ...=MatchLowercase,Ligatures=TeX]{Helvetica} ----------------------------------------------------------------------------------------------------------- Google told me that this might be related to code that originally came from context but wasn't changed to work with luatex. But I'm not sure since I'm not a developer. If there's sth. I can do to identify/fix the bug, please don't hesitate to tell me. Regards, Tobias Link

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 08 Feb '11

08 Feb '11

------------------------------------------------------------------------ r4082 | oneiros | 2011-02-07 22:14:14 +0100 (Mon, 07 Feb 2011) | 2 lines Changed paths: D /branches/0.30 D /branches/0.40.x D /branches/0.60.x rm obsolete branches ------------------------------------------------------------------------ r4083 | hhenkel | 2011-02-07 23:09:59 +0100 (Mon, 07 Feb 2011) | 2 lines Changed paths: M /branches/lua-obj/source/texk/web2c/luatexdir/luascripts/pdflua.lua M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.w experimental getpagelist() ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 07 Feb '11

07 Feb '11

------------------------------------------------------------------------ r4081 | hhenkel | 2011-02-07 21:55:39 +0100 (Mon, 07 Feb 2011) | 2 lines Changed paths: M /branches/lua-obj/source/texk/web2c/luatexdir/luascripts/pdflua.lua M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfgen.w M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.h M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.w create /Catalog and /Info dicts early ------------------------------------------------------------------------

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Cron <luatex@boekplan> /var/www/luatex.org/www/bin/luatex-svn
by root＠mail.boekplan.nl 07 Feb '11

07 Feb '11

------------------------------------------------------------------------ r4078 | hhenkel | 2011-02-06 22:32:20 +0100 (Sun, 06 Feb 2011) | 2 lines Changed paths: M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.w (lua-obj) Real and Null objects fixed ------------------------------------------------------------------------ r4079 | hhenkel | 2011-02-07 00:23:36 +0100 (Mon, 07 Feb 2011) | 2 lines Changed paths: M /branches/lua-obj/source/texk/web2c/luatexdir/luascripts/pdflua.lua M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfgen.w M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.h M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdfluaapi.w M /branches/lua-obj/source/texk/web2c/luatexdir/pdf/pdftypes.h scripted /Info dict (experimental) ------------------------------------------------------------------------ r4080 | hhenkel | 2011-02-07 00:30:22 +0100 (Mon, 07 Feb 2011) | 2 lines Changed paths: M /branches/lua-obj/source/texk/web2c/luatexdir/luascripts/pdflua.lua fix infotoks ------------------------------------------------------------------------

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file permissions
by Reinhard Kotucha 07 Feb '11

07 Feb '11

Hi Taco, when writing scripts in texlua, I often have to find out whether a file or directory is readable or writable. The permission flags I get from lfs.attributes() are not sufficient. Though I can determine the UID and GID of the file owner, I still have to find out my own UID and GID and whether I'm member of a particular group. This is difficult, sometimes impossible (without access to getpwent(3) and getgrent(3)), and quite system dependent. In order to test whether a file is readable I currently open this file in a protected call. This is also possible for directories when I run lfs.dir() inside pcall(). It's not very elegant, and I still have no idea how to test whether a file is writable. I could try to open the file in append mode, but I fear that if the file is writable, this test would change the time stamps. Not very elegant either. I'm not aware of a better solution, but maybe I'm missing something. If not, I propose a new function lfs.access() which takes a file name and a string as an argument containing any combination of the letters 'r', 'w', or 'x' and returns the result of the system call access(2) (as a boolean). For instance, lfs.access(somefile, "rx") would then return the result of the system call access(somefile, R_OK|X_OK). On Windows there is a function _access() in the runtime lib which is similar to access(2) on Unix, though the executable flag isn't supported. Maybe it can be ignored. On the other hand it would be very convenient if the function returns true if the file is in PATH and its extension is in PATHEXT (as described in the MSVCRT sources). This makes the function call more expensive, but I think that access(2) is relatively expensive on Unix too because of the UID/GID lookups. I first considered to propose to extend lfs.isfile() and lfs.isdir() by an optional argument, but because lfs.isfile() checks whether a file is a regular file (which is fine), this seems to impose an unnecessary limitation: print(lfs.isfile('/dev/null')) => false print(lfs.attributes('/dev/null', 'mode')) => char device Hence, I think that a separate function lfs.access() makes more sense. WDYT? Regards, Reinhard -- ---------------------------------------------------------------------------- Reinhard Kotucha Phone: +49-511-3373112 Marschnerstr. 25 D-30167 Hannover mailto:reinhard.kotucha@web.de ---------------------------------------------------------------------------- Microsoft isn't the answer. Microsoft is the question, and the answer is NO. ----------------------------------------------------------------------------

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HarfBuzz [slightly off-topic]
by Graham Douglas 03 Feb '11

03 Feb '11

Hi to all Apologies in advance for the slightly off-topic nature of this post. I've been reading about HarfBuzz which certainly looks to be an interesting project. From the project page there is a link to an article titled "State of Text Rendering" by Behdad Esfahbod http://behdad.org/text/ Within that article is a section on TeX engines with a reference to XeTeX and LuaTeX --- I'm just quoting a small bit of the article which I hope is not too much out of context: "The XeTeX creator is working on HarfBuzz on behalf of Mozilla now, and plans to port XeTeX to HarfBuzz eventually. In the long term though, pdfTeX's successor luaTeX should be made to do the same thing. There is more to Unicode support than just shaping, and in those areas the TeX engines can gain a lot by building on top of existing libraries." At present my own understanding of the precise role that HarfBuzz could play is a little sketch/hazy right now, but I'm working on that ;-). In the meantime I'd be interested to know if, in theory, HarfBuzz could be usefully plugged into LuaTeX, such as via an external library (.so/.dll).From what I understand... HarfBuzz provides a shaping engine so that, for example, it could provide useful services such as the bidi algorithm, and information that could be useful for typesetting complex scripts such as Arabic. Again, I stress my currently incomplete understanding of the precise services HarfBuzz would provide. lso, how would you pass back to LuaTeX the results so that the LuaTeX engine could use them? If anyone could help me understand this a little more or indeed let me know if there really is nothing to explore that too would be good. I have not tried to compile HarfBuzz yet so have not played with it at all. I'm merely curious in light of the remarks on the HarfBuzz site. Thank to anyone who can shed some light on this for me. Cheers Graham

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