[poppler] ?==?utf-8?q? pfdtocairo altering bbox of embedded font

[Ken Sands]

Of course, wasn't obvious where was best, I'll do that now thanks.


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Ken Sands
Development Manager - dsi billing services
07803 194347______________________________________________________________________________


On Monday, May 18, 2020 17:08 BST, Oliver Sander <oliver.sander at tu-dresden.de> wrote:
 Hi Ken,

can you open an actual bug report at

https://gitlab.freedesktop.org/poppler/poppler

and attach the file? Helping is a lot easier with the problematic file.

Best,
Oliver

On 18.05.20 16:31, Ken Sands wrote:
> Hello all, I tried to run a pdf through pdftocairo in order to embed some non embedded fonts to ready a file for sending off to a printer.
> The fonts embedded just fine, however of the fonts that were already embedded one (helvetica) was assigned a new negative bbox.
>
> While that doesn't appear to cause any issues with appearance it does cause adobe reader to throw up a BLABLA_Helvetica contains a bad /BBox message box.
>
> I checked the original file and the font in there has FontBBox[ -951 -481 1446 1122]
>
> I checked the file after pdftocairo and it's /FontBBox [ 31049 -480 1445 1121 ]
>
> I edited the resulting file to [ -951 -480 1445 1121 ] and the error is gone, to be sure I diff checked the output and all 3 are visually identical.
>
> Looking at those numbers it seems to me there is a fairly simple int -> uint thing slipping through somewhere, and I'm happy to try to track it down but wish to narrow my search.  
>
> So I duely googled for a few hours and I'm aware this could well be either cairo or a font library issue rather than poppler however I'm no wiser and hoped one of you could at least shuffle me in the most likely direction, thanks. 
>
> --
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>
> Ken
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