TeX, LaTeX and Friends

9:08 AM

Morning all

11:42 AM

@UlrikeFischer About?

12:57 PM

@JosephWright ?? About what??

@UlrikeFischer Creating PDF objects

@UlrikeFischer I'm looking at l3draw a bit, and the parts that link to other concepts. Tackling transparency, I'll need to do some basic stuff on objects. So I was wondering what sort of interfaces would be good for you in tagpdf.

1:08 PM

@UlrikeFischer I'm looking at your set up for objects: I take it that you have to have them written right at the end (using etoolbox's \AfterEndDocument hook) rather than \AtEndDocument

1:20 PM

@JosephWright Hm. Well normal graphics are imho regarding accessibility more or less a black box. Like an img in html: all the info has to go in the alt-key. So you need some hook at the user level to put code at the begin and at the end. A special case are nodes: They are often used to add text, so one need hooks to mark and store them.

@JosephWright I'm not sure that I really need \AfterEndDocument. But when writing the structure objects I naturally need to know all the relevant structure, including floats and stuff perhaps added in \AtEndDocument -- so it is a bit of a race: writing later it better ;-).

@UlrikeFischer Sure

@UlrikeFischer At this stage I'm still on the l3draw functionality sweep - matching pgf

@UlrikeFischer Point is that the outstanding stuff is mainly held up by needing driver support, and that overlaps strongly with tagging: PDF objects and the like

@UlrikeFischer Right

@UlrikeFischer I'll raise this with the team: I think a private hook that is intentionally right at the end, after everything, would be good

@UlrikeFischer When I say private, I mean 'explicitly for finalising PDF/tagging structures'

@JosephWright Where do you think that it overlaps?

@UlrikeFischer Both of them need PDF object structures and similar: low-level support or at least some abstraction beyond using \tex_pdflastobj:D and similar

@UlrikeFischer For example, one can create PDF objects in (x)dvipdfmx, so there should be a common interface

@JosephWright Ah. You mean the various commands that I setup in e.g. tagpdf-luatex.def. Like \__uftag_pdfobj:Nn. Yes, it would be useful if they were already defined in l3driver.

@UlrikeFischer Exactly

@UlrikeFischer Just wondered if there was a particular interface that would be useful

1:43 PM

@JosephWright This part of the code more less only set alias names for the primitives. Everything that offers an driver independant interface should be fine. In luatex it could be useful to have an interface to get and set the data also in lua.

2:45 PM

@PauloCereda you should try a European summer:

3

3:23 PM

+w+-+++++++++++++++++++++++++]]

@barbarabeeton your comments are as insightful as ever:-)

@DavidCarlisle -- drat. i was cleaning my keyboard, and i forgot to disconnect it. let that be a lesson. (lovely summer, by the way. our furnace kicked on last night. very, very strange. more like indian summer than the real thing. better, though, than 35=(c) temperatures with almost 100% humidity, which is what was happening up to a couple of weeks ago.)

@barbarabeeton we walked that ridge last Sunday but the temperature was 30 degrees C higher last week:-)

@DavidCarlisle -- so you didn't need your long woolies.

3:39 PM

@barbarabeeton today it was a bit nippy (1C)