Re: [Bug-AUCTeX] preview-1.260; dvipng warning appears to cause preview abort

[David Kastrup]

Evil Boris <address@hidden> writes:

> I wonder about the following stuff that appears in the log:
> ========
> dvipng warning: at (1,0) ignored header 
> \special{!/address@hidden(CVS-1.107)def} dvipng warning: GhostScript calls 
> disallowed by --noghostscript dvipng warning: GhostScript calls disallowed by 
> --noghostscript dvipng warning: GhostScript calls disallowed by 
> --noghostscript dvipng warning: GhostScript calls disallowed by 
> --noghostscript dvipng warning: GhostScript calls disallowed by 
> --noghostscript 
> Preview-DviPNG exited abnormally with code 1 at Sun Jul 10 11:07:19
> Running `Preview-DviPS' with ``dvips -Pwww _region_.dvi -o 
> "_region_.prv/tmp3528gvT"/preview.ps''
> ========
> It seems to indicate that preview tries to run dvipng, chokes on a
> special, considers this an error, and gives up on using dvipng...

Well, no.  preview-latex runs dvipng, finds that your file uses some
GhostScript specials, and then runs dvips and GhostScript to generate
just those previews which rely on GhostScript.

The one thing that would be worth improving is that dvips is run on
the entire DVI file (Ghostscript is then just used on the interesting
parts of the PostScript file, however).

I am not sure whether there are maximum command line lengths or
similar involved on different operating systems (we already had
complaints about exceeded command lengths on some Ghostscript command
lines for some Windows versions, and this could be much more severe
when passing a long page list on the command line to dvips).

So this is not something that is going to be changed before the next
release.

> Preview-DviPS finished at Sun Jul 10 11:07:20
> Running `Preview-Ghostscript' with ``"gswin32c" 
> "-dOutputFile=(_region_.prv/tmp3528gvT/pr1-%d.png)" "-q" "-dSAFER" 
> "-dNOPAUSE" "-DNOPLATFONTS" "-dPrinted" "-dTextAlphaBits=4" 
> "-dGraphicsAlphaBits=4" "-sDEVICE=png16m" "-r79.6544x79.6544"''

Here is a clue: only those files that have a file name of pr1-1.png or
similar will have been generated by Dvips/Ghostscript.  All the rest
in the temporary directory will be from Dvipng.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum