[Dev-luatex] Behaviour of \textdir in alignment preambles (Re: \pardir and \textdir etc)

Yannis Haralambous yannis.haralambous at enst-bretagne.fr
Wed Sep 19 12:38:31 CEST 2007

there should definitely be no overprint!

when you write in Arabic you fill a box (from the R to the L) and  
then place the left border of that box on the current point. Having a  
result equivalent to the use of \llap makes no sense.

Le 19 sept. 07 à 11h59, Taco Hoekwater a écrit :

> Hi,
> Taco Hoekwater wrote:
>> In the process of looking into it now, I did find some
>> unreliability in te i386 executable, which possibly stems
>> from the same bug as your crash.
> Here is something weird: 'my' bug was a problem that happened
> only in \pdfoutput=1 mode, and it was very easy to fix. Eythan,
> if you were testing in pdf mode, this is likely the cause
> of the crashes on amd64, and the latest trunk will fix it.
> If you had crashes in dvi mode, my fix will do nothing for you.
> I did run into something different that now needs to be resolved:
> The pdf bidi output internals are quite different from the dvi
> ones, and I now get the to-be-expected output "This andtaht"
> (no overprint), but only in pdf mode. In dvi mode, there is
> still overprint, as in Aleph.
> This confuses me a bit: I am now not sure which of the two
> outputs is 'officially' wrong. CC to Yannis, hoping he can tell
> me whether the dvi overprint is a bug or intended behaviour
> (I have attached the tex input and a pdf generated by Aleph).
> Best wishes,
> Taco
> <halign-textdir.pdf><halign-textdir.tex>

| Yannis Haralambous, Ph.D.      yannis.haralambous at enst-bretagne.fr |
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