Angus Leeming wrote:
> I get a bunch of warnings like
> 
> [43/home/angus/preview-latex/devel/dvipng/dvipng warning: at (9633,8) 
> unimplemented \special{ps::-32891 -32891 32891 32891 1655772 576976 
> 22609920}. ps::-32891
> ]
> 
> Which looks to me to be the metrics info that preview.sty generates when 
> passed the option 'lyx'.
> 
> If you look in lyxpreview2bitmap.sh, you'll see it creates a .metrics file 
> which in this case starts:
> 
> Preview: Tightpage -32891 -32891 32891 32891
> Preview: Snippet 1 282168 127431 338831
> Preview: Snippet 2 447828 0 491521
> Preview: Snippet 3 1612921 597113 22609920
> ...
> 
> Further investigation reveals that it is not the 'lyx' option which causes 
> these warnings but the 'tightpage' one.

I havent implemented these specials, and at the moment I'm not even
sure what they're for. Possibly it has something to do with positioning.

> Nonetheless, this problem is minor. The major problem is that I can't 
> generate anythng sensible! The resultant png files are ridiculous ;-) 
> Attached is my trial1.png together with the equivalent if using the 
> dvips,gs,pnmcrop route. Here, I invoke preview.sty so:

You are using dvipng-0.4, right? That version contained a bug that
would make the boundingbox Real Strange <TM> on certain platforms (or
rather, with certain compilers). This is fixed in 0.5.

Attached is an example. (dvipng -T tight trial)

/JÅ


-- 
TeX, n.: A part of a typesetting system that preserves the medieval
         traditions of sorcery and black art.  

<<attachment: trial3.png>>

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