October 2009 - dev-luatex - NTG Mailing Lists

Snapshot 20070307
by Taco Hoekwater 10 May '12

10 May '12

Hi all, I decided to do a snapshot now instead of waiting for friday, because I want to start concentrating on something else besides font support issues. What's new: * Non-CID PostScript-based Opentype fonts are now combined over the entire document, and properly subsetted. The code is borrowed from xdvipdfmx with some minor adjustments Adding support for CID-keyed OpenType fonts would not be hard but at the moment I lack example input (and incentive). * A small extension to the virtual fonts structure: you can use f.fonts[1] = { 'id' = 38} to do a backreference to a previously defined font. This saves quite a few computations * There was a bug in the handling of \leaders in the output whereby it's width was taken to be twice what it should be while writing to the PDF, fixed now. * The font inclusion code is cleaned up a bit by Hartmut. * Some compilation problems were fixed. * There is (quite a bit of) debugging information printed out when OTPs are in use, because I am tracking down a bug reported by Idris. The input of each and every OTP step is shown on the terminal in a line line this: [57902][1568][58423][1568][58408][1568][58921] those are the decimal values of ocp i/o characters. If you don't need them, don't worry about it. Happy TeXing, Taco ----- Downloading and installation details: If you go to https://foundry.supelec.fr/frs/?group_id=10 you will see that there are three new released files: * luatex-snapshot-20070307.tar.bz2 This is the source tree. * luatex-snapshot-20070307-win32.zip A cross-compiled (mingw) windows binary. This is a web2c based binary, so it needs a texmf.cnf file (It will NOT work if you have only miktex installed). * luatex-snapshot-20070307-linux-i386.tar.bz2 An intel 32 linux binary (2.6.17)

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XML abilities in LuaTeX
by TeXWorld 19 Nov '09

19 Nov '09

Hello, I'm new to LuaTeX and Lua in general and I try to find tools to process datas stored in XML files. I want to do this with LaTeX (pdfLuaLaTeX in TeXLive 2008) but there's no tool. Contrary to LaTeX, ConTeXt does have abilities to work with XML files. Do you think it could be possible to have LuaTeX equipped with such abilities one day ? I read in the LuaTeX reference that LuaTeX comes with modules such as LuaZIP that is really a good thing. Do you think it would be possible to have something like the LuaXML module added to luatex too ? Jack

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Luatex 0.44.0 announcement
by Taco Hoekwater 02 Nov '09

02 Nov '09

Hi, I have just uploaded the archives for a new luatex release, 0.44.0. There are not a lot of new features yet, but this releases fixes a fair amount of bugs found in 0.43.0 (and earlier versions). New features: * libpng is now 1.2.40. * hlist nodes now have a subtype to distinguish hlists generated by the paragraph breaking, explicit \hbox commands, and other (as-yet-undefined) sources. * \pdfobj now has an extra optional keyword: 'uncompressed', which forces the object to be written to the PDF in plain text (see the manual for the exact details). * The lua file from the luamd5 library (which provides the md5.hexsuma() function) is now embedded in the executable. Bug fixes: * \latelua now works in DVI mode again. * status.output_file_name could crash when used too soon. * In 0.43, rules were not output at all in DVI mode. * \leavevmode\penalty-10000\penalty-10000 crashed luatex. * the API of margin kern nodes to lua was using the wrong fields in the nodes. * A few fixes to the manual. * PDF Xref stream dicts were slightly non-conformant. * There was too much space between two consecutive math displays (this bug was inherited from Aleph) * Synctex was broken (thanks, Akira) * Font mark classes were handled incorrectly by the fontloader code. * There was a crash possible with certain types of named PDF destinations. * Math delimiters and large operators in new MATH fonts no longer apply the italic correction (this fixes placements of super- and subscripts on such items for those fonts). * The converter from lua strings to token lists (for the node interface) sometimes generated invalid tokens. * CFF (OpenType) fonts now listen to 'embedding="full"'. TTF is still todo. * Font tables with 'embedding="no"' would cause luatex to crash. * \pdfobj file {} failed to find the file if there was no lua callback in place. * An optimization in MS Mincho caused luatex to crash. The archives can be downloaded from supelec as usual: http://foundry.supelec.fr/gf/project/luatex/ You could also check out the sources via anonymous svn: svn co http://foundry.supelec.fr/svn/luatex/tags/beta-0.44.0 Bugs and feature requests can be added to the issue tracker at http://tracker.luatex.org Have fun, Taco

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 31 Oct '09

31 Oct '09

------------------------------------------------------------------------ r3090 | taco | 2009-10-31 15:52:37 +0100 (Sat, 31 Oct 2009) | 4 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/fontforge/fontforge/parsettf.c M /trunk/source/texk/web2c/luatexdir/luafontloader/fontforge/fontforge/psread.c M /trunk/source/texk/web2c/luatexdir/luafontloader/fontforge/fontforge/splinefont.h Speed up reading of OTF fonts in fontloader.open() by using an approximate boundingbox that is calculated during CFF parsing instead of the perfectly accurate one that had to be calculated based on actual splines. ------------------------------------------------------------------------

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 28 Oct '09

28 Oct '09

------------------------------------------------------------------------ r3089 | taco | 2009-10-28 15:38:26 +0100 (Wed, 28 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/image/pdftoepdf.cc initial fix for premature newlines ------------------------------------------------------------------------

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 27 Oct '09

27 Oct '09

------------------------------------------------------------------------ r3088 | taco | 2009-10-27 16:28:43 +0100 (Tue, 27 Oct 2009) | 3 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/mapfile.c allow a null font name in the fmlookup() function, for the benefit of lua-loaded fonts ------------------------------------------------------------------------

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 27 Oct '09

27 Oct '09

------------------------------------------------------------------------ r3084 | taco | 2009-10-27 11:43:01 +0100 (Tue, 27 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/NEWS New News ------------------------------------------------------------------------ r3085 | taco | 2009-10-27 11:43:57 +0100 (Tue, 27 Oct 2009) | 2 lines Changed paths: A /tags/beta-0.44.0 (from /trunk:3084) new release tag ------------------------------------------------------------------------ r3086 | taco | 2009-10-27 13:15:11 +0100 (Tue, 27 Oct 2009) | 2 lines Changed paths: M /trunk/manual/luatexref-t.pdf M /trunk/manual/luatexref-t.tex new manual + small fix ------------------------------------------------------------------------ r3087 | taco | 2009-10-27 13:16:51 +0100 (Tue, 27 Oct 2009) | 2 lines Changed paths: M /tags/beta-0.44.0/manual/luatexref-t.pdf M /tags/beta-0.44.0/manual/luatexref-t.tex fixes to the manual from trunk ------------------------------------------------------------------------

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Wishing is free: fonts and glyph placement
by Javier Múgica 27 Oct '09

27 Oct '09

If one takes a look at the kerning pairs of a font with many accented letters, for instance lmr10, there are many "duplicate" pairs, in the sense that in addition to "ko" there also appear "kó", "kò", "kô" and so forth, and "ke", "ké", etc., obviously with the same kerning value, and if we had \'k (accented k) then all of the combinations again. If a new accented letter gets added, all its pais have to be encoded. There is clearly some logic missing there. The idea is that something which is at the right like k, plus something which is at the left like o, needs a kerning of such and such. While the quadratic grouth of pairs is still tractable for normal text with the current speed and memory capacities of computers, it becomes out of control in math, where the possible pairs is beyond any tabulation capacity. I for example had recently Q\Sigma, which clearly requires kerning. The underlying problem is that TeX does not take into account the actual shape of the glyphs, but just its enclosing rectangle. Since this is not sufficent for high quality typesetting there are two pieces of information relating to the shape of the gliph beyond the enclosing rectangle that TeX knows about: the kerning pairs and the italic correction. There are just two patches that leave many situations to be manually adjusted by the editor (I refer to the person), depending on his patience and quality standards, specially in math, where both the pairs of gliphs that get combined and the relative position of them is virtualy unlimited. While computing gliph spacing by analyzing the glyph's shapes may be too involved, a good, easier solution could be that, in addition to the rectangle enclosing the glyph, another shape were known, not so complicated as a glyph's shape but not so crude as a rectangle. I could be restricted to a one-piece polygon without holes enclosing the character and leaving a little space between its border and the character (as the character's box currently does). For example, the polygon for the letter k could be a rectangle with a wedge intruding at the right side, while that of o, ó, e, etc. could be an octagon. So when these characters were placed together it would be done so that the respective polygons touch, instead of the rectangular boxes as is now the case, and the need of kerning would disappear. This approach would: -- reduce the kerning pairs drastically -- need a linear grouth with the number of glyphs in the font (the polygons) instead of a quadratic one. -- New glyphs, specialy adorned variants of existing ones, would automatically get the correct spacing with existing ones. -- Pairs that seldom appear and are thus not considered in the kerning tables, would also get the right spacing automatically. -- The unlimited possible combinations inside math would get handled correctly. Most of them or at least many. Thus, the need for dozens of \! \, \phantoms and like stuff would decrease substantialy. Here are some examples: \Bigg)_{\!0} (or was it even _{\!\!0}?) f^2\,) %here it is the left protruding of the )'s polygon that would come into play. 1/\!\sqrt{3} This requires adding another piece of info per-character in the font. Now I can't remember how the tables of an OT font are orginized and don't know whether this is possible or not. The inconvenience I see in trying to compute the spacements based directly on the shape of the gliph (with respect to the polygons I'm proposing), appart from the many bugs that could be present till it finally got properly programmed, is that it is too big a jump form the current glyph placement algorithms in math, but it may well be that my fears are unjustifed. The polygon approach has also the advantage that it is easier to define the polygons so as to obtain the current spacing between the most common kerning pairs, while it would be more difficult to program an algorithm based on the glyphs' shapes achieving the same effect, but on the other side it need not be better to exactly preserve the current kerning values. It may be too son for proposing this now, but I'm sure this will sooner or later (possibly later) come to be discussed, since for the finest text editor, a glyph placement in math based solely on the rectangle of the glyphs and the italic correction cannot possibly be the definitive solution. Cheers to all Javier A. Múgica

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 26 Oct '09

26 Oct '09

------------------------------------------------------------------------ r3076 | oneiros | 2009-10-25 23:50:13 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/ffdummies.c M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c indent, svn:keywords, header ------------------------------------------------------------------------ r3077 | oneiros | 2009-10-25 23:51:23 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/pdf/pdfgen.c M /trunk/source/texk/web2c/luatexdir/pdf/pdftables.c indent ------------------------------------------------------------------------ r3078 | oneiros | 2009-10-25 23:52:31 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: 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/luagen.c M /trunk/source/texk/web2c/luatexdir/lua/luainit.c M /trunk/source/texk/web2c/luatexdir/lua/luatex-api.h M /trunk/source/texk/web2c/luatexdir/lua/luatoken.c indent ------------------------------------------------------------------------ r3079 | oneiros | 2009-10-25 23:53:33 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/font/writetype0.c indent ------------------------------------------------------------------------ r3080 | oneiros | 2009-10-25 23:55:06 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/tex/align.c M /trunk/source/texk/web2c/luatexdir/tex/linebreak.c M /trunk/source/texk/web2c/luatexdir/tex/mainbody.c M /trunk/source/texk/web2c/luatexdir/tex/mlist.c M /trunk/source/texk/web2c/luatexdir/tex/printing.c M /trunk/source/texk/web2c/luatexdir/tex/texmath.c indent ------------------------------------------------------------------------ r3081 | oneiros | 2009-10-25 23:57:52 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luatex.c svn:keywords ------------------------------------------------------------------------ r3082 | oneiros | 2009-10-25 23:58:59 +0100 (Sun, 25 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/ffdummies.c M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c rm svn:mergeinfo ------------------------------------------------------------------------ r3083 | oneiros | 2009-10-26 00:17:31 +0100 (Mon, 26 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/ffdummies.c add some attributes ------------------------------------------------------------------------

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 23 Oct '09

23 Oct '09

------------------------------------------------------------------------ r3075 | taco | 2009-10-23 08:52:48 +0200 (Fri, 23 Oct 2009) | 2 lines Changed paths: M /trunk/source/texk/web2c/luatexdir/luafontloader/src/luafflib.c fix a bug with MS Mincho whis has baseline_cnt=1, but no baseline position info ------------------------------------------------------------------------

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