January 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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A native support for SVG
by TeXWorld 18 Apr '09

18 Apr '09

Hello, I'm a ConTeXt (and LaTeX too) user. When I want to make a vector picture, I'm trying most of the time to use programs who can export PGF/TikZ or PStricks. A lot of users like me don't "program" their vector pictures and use wysiwyg programs like Inkscape or Illustrator to generate PStricks ou PGF/TikZ code. Of course whatever program used, we can find a SVG export. SVG is the most spread and the most used format to store vector pictures. I request a native support for SVG in XeTeX and in LuaTeX, I think it would be a great thing. Of course when I want to include SVG pictures in my documents I can convert them to pdf before but the problem is that labels and texts won't be compiled : fonts will be wrong. What do you think about this ? Do you think it's something possible ?

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Help with fonts needed
by Taco Hoekwater 10 Apr '09

10 Apr '09

Hi all, The next big release of luatex will be about (opentype) math. One of the prerequisites of that is the ability to handle the opentype math features, and that means updating the embedded fontforge code. This is what I am currentlu working on. While updating the fontforge.to_table() code, I noticed that there where still some todo items in the source and it would be nice if these could be resolved as well. If have written tentative code for those now, but I do not have the fonts to go with the code so it is not at all unlikely that there are crash-level bugs and/or misconceptions. In order to make luatex even better, I need your help finding good examples of each of the following font types: * Apple dfont collections * AAT fonts in all forms * Apple Multiple Master (AAT "fvar") * Adobe's Type1-based Multiple Master * Fonts specifying baseline settings (OT "BASE" | AAT "bsln" ) * Fonts specifying justification data (OT "JST" | AAT "just") Please drop me a line if you can help out with any of these... Best wishes, Taco

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Generating the sources
by Javier Múgica 02 Feb '09

02 Feb '09

Some time ago I had a problem with the fonts when generating the format, which I posted here. New versions didn't solve it, I always get the annoying Could not load ec-lmr12.tfm. Inexistent or bad font file, or something like that. I decided to compile and debug LuateX myself. Something worth indeed if I ever plan to become a developper. It was the first time I tangled something. I saw a luatangle.web (if my memory does not betray me), so I started tangling that, but I get pascal code, and I don't have a pascal compiler. I haven't had time ever since, so I simply stopped. Is there a way of generating c-source, or will I have to wait to September or so? If there is one, even though I am a programer a step-by-step explanation will be very wellcome. Tanks, --Javier A.

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A few newbie questions
by Yue Wang 01 Feb '09

01 Feb '09

Hi, Taco: Last week I stayed in my grandma's home (located in a beautiful countryside) which has limited internet access. So I planned to study the luatex source code during the stay. I read a small subsect of the LuaTeX source and most parts of MetaPost source code and have a few newbie questions: I will refer to the mp.w as an example, since it is finished and I am more familiar with the C programming language. - wouldn't it be great if we remove the packed data dependency? Knuth used packed data since memory space was very valuable during the years when he wrote the TeX and MetaFont program. By doing so, he can split a memory word (the space needed for a 32bit integer) into two, three or four so that he can save more spaces. In pdfTeX and MetaPost, almost all the important data structures (like all kinds of nodes, boxes, lists) are build on top of the packed data structure. For example, In TeX's char_node presentation, instead of using one word for font and one word for character, he can use one word to do so by defining two web macros font==type and character==subtype. However, Memory consumption is not that important these years and in LuaTeX other representations uses much more memory (like parsing a complicated opentype font and dumping it into a lua table using the fontforge library). So wouldn't it be bettter if we remove the packed data? It will make the code more readable at the cost of consuming a few more memory (the TeX web side is very memory efficient, so there won't be big memory footprint even if we double the memory consumption) since we can get rid of the messy web or C macros. For example, in Part 21, mp.w, we define more than a dozen macros to get all the variables of a edge which A points to its start. Such code may confuse modern programmers who learn to program in C after the mid-1990s. They prefer to do something like this: typedef fill_node struct { path *path_p; pen *pen_p; ..... int miterlim_var; }; if we want to create a new fill node, instead of creating its node, and setting its path_p to a given pointer p using mp_path_p(t)=p; it will be more understandable if we can do this: node * mp_new_fill_node (pointer, p){ fill_node *fn = malloc (sizeof (fill_node)); /* a fill_node*/ fn->path_p = p; fn->pen_p=NULL; fn->red_val=0 .... return fn } -Why can't we use IEEE floating number specification? TeX/MetaPost have it's own number presentation builtin. But this is a very complicated and strange floating number system which represent each number as a integer. I think IEEE floating number specification is good enough for implementing TeX? Today almost every operating system support float/double, and the precision is great. If we can do this, Part 7 of the mp.w and luatex.web can be totally removed, and we can also clean the conversion macros in the rest of the macros. If we remove the dependency of part 7 and part 9, maybe we can also make our code more portable on different machines. - Why should we do memory management ourselves? I can see that in mp.w, we maintain a node pool (a fixed continuous space in physical memory). When we want to allocate a node, we should call mp_get_node, which does several things like finding available place for memory allocation, reporting error if the memory is exceed then it tries to put everything with different structures into the pool. Wouldn't it be great if we just ask the operating system's C library to handle these tasks (like using malloc and free as the example code of mp_new_fill_node shows). Modern operating system's library is more efficient, and it will also make the luatex code looks better. - From the part of the code I read, if I understand correctly, the only reason of incorporating fontforge is to get the font Metrics data? If so, I think FreeType2 is sufficient to accomplish the task? [I think freetype2 is much smaller and efficient, and fontforge use freetype2] Yue Wang

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

31 Jan '09

------------------------------------------------------------------------ r1848 | oneiros | 2009-01-31 01:02:09 +0100 (Sat, 31 Jan 2009) | 2 lines Changed paths: M /trunk/src/texk/web2c/luatexdir/ptexlib.h add missing declaration ------------------------------------------------------------------------ r1849 | oneiros | 2009-01-31 01:05:23 +0100 (Sat, 31 Jan 2009) | 2 lines Changed paths: M /trunk/src/texk/web2c/luatexdir/ptexlib.h M /trunk/src/texk/web2c/luatexdir/tex/math.c M /trunk/src/texk/web2c/luatexdir/tex/mlist.c M /trunk/src/texk/web2c/luatexdir/tex/texnodes.c indent ------------------------------------------------------------------------

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Cron <luatex@vz3> /var/www/luatex.org/www/bin/luatex-svn
by root＠www.metatex.org 30 Jan '09

30 Jan '09

------------------------------------------------------------------------ r1846 | taco | 2009-01-30 16:45:34 +0100 (Fri, 30 Jan 2009) | 4 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/src/texk/web2c/luatexdir/font/luafont.c M /trunk/src/texk/web2c/luatexdir/font/texfont.c M /trunk/src/texk/web2c/luatexdir/font/texfont.h M /trunk/src/texk/web2c/luatexdir/luatex.web M /trunk/src/texk/web2c/luatexdir/tex/math.c M /trunk/src/texk/web2c/luatexdir/tex/mlist.c M /trunk/src/texk/web2c/luatexdir/texmath.h support a MathConstants table while loading fonts via lua, and make these settings have precedence over traditional tfm-style math parameters ------------------------------------------------------------------------ r1847 | taco | 2009-01-30 17:21:53 +0100 (Fri, 30 Jan 2009) | 2 lines Changed paths: M /trunk/manual/luatexref-t.pdf M /trunk/manual/luatexref-t.tex added a table listing default initializations of math parameters ------------------------------------------------------------------------

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

28 Jan '09

------------------------------------------------------------------------ r1844 | oneiros | 2009-01-28 16:30:04 +0100 (Wed, 28 Jan 2009) | 2 lines Changed paths: M /trunk/src/texk/web2c/luatexdir/tex/math.c fix warning "passing argument 1 of ?\226?\128?\152tprint_esc?\226?\128?\153 discards qualifiers from pointer target type" ------------------------------------------------------------------------ r1845 | taco | 2009-01-28 16:41:16 +0100 (Wed, 28 Jan 2009) | 2 lines Changed paths: M /trunk/manual/luatexref-t.tex M /trunk/src/texk/web2c/luatexdir/luatex.defines M /trunk/src/texk/web2c/luatexdir/luatex.web M /trunk/src/texk/web2c/luatexdir/tex/math.c M /trunk/src/texk/web2c/luatexdir/texmath.h improved names for the new math parameter primitives ------------------------------------------------------------------------

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

28 Jan '09

------------------------------------------------------------------------ r1843 | taco | 2009-01-28 15:05:32 +0100 (Wed, 28 Jan 2009) | 4 lines Changed paths: M /trunk/src/texk/web2c/luatexdir/commands.h M /trunk/src/texk/web2c/luatexdir/lua/luatoken.c M /trunk/src/texk/web2c/luatexdir/luatex.defines M /trunk/src/texk/web2c/luatexdir/luatex.web M /trunk/src/texk/web2c/luatexdir/tex/math.c M /trunk/src/texk/web2c/luatexdir/tex/mlist.c M /trunk/src/texk/web2c/luatexdir/texmath.h This introduces a whole batch of primitives for the setting of math parameters. The names are preliminary, and the settings are not used yet! ------------------------------------------------------------------------

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