[tex-k] The dvitype utility can't dump XDV files
Peter_Dyballa at Freenet.DE
Thu Oct 14 00:40:23 CEST 2010
Am 13.10.2010 um 16:56 schrieb Peter Breitenlohner:
> did you also change the id_byte at the end, i.e.in the postamble?
No, I did not think of this "doppelte Buchführung". (Changing it
produces more output and more errors like:
byte 576 is not postpost!
bad postamble pointer in byte 577!
identification in byte 581 should be 2!
Bad DVI file: signature in byte 582 should be 223!
>> Could dvitype learn to "officially" support XDV files in order to
>> be able to debug them or compare the output from different XeTeX
> Possibly, probably as a separate program similar to pdvitype for
> dvi file as produced by pTeX. As a prerequisite one would need a very
> precise description of the XDV format.
It must be in xetex.ch. There the changed DVI type ID is documented –
at the beginning of almost 10,000 lines. The most important changes
are a possible vertical writing direction and that all characters used
are in UTF-16 encoding – possibly similar to pTeX. Possibly different
is the use of US-ASCII for recording \special's and font names.
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