[XeTeX] Size of PDF files produced by XeTeX

[Bruno Voisin]

Le 31 mai 06 à 17:19, Jonathan Kew a écrit :

> You could try opening the PDF in Preview and saving a new copy with
> the "Reduce File Size" Quartz filter enabled (via the Save As dialog
> in Preview), or using the "Compress PDF" option from the Print
> dialog. I don't know exactly what effect each of these will have;
> you'll want to review the results and see if the graphics are still
> of a suitable quality, as I guess they'll affect the JPEG compression.

Thanks, as always. That was indeed the way forward. From a 7.3 MB PDF  
file produced by XeTeX:

- The first suggestion (Save As in Preview, then Reduce File Size  
Quartz filter) produces a 1.4 MB PDF file, but with significant loss  
of resolution (visible when using magnification).

- The second solution (Print then Compress PDF in the PDF pull-down  
"button") produces a 3 MB PDF file with no visible loss of  
resolution. The user interface is odd (the file is first re-read in  
Preview, then compression begins and the advancement is displayed in  
the menu bar through messages, a spinning wheel and a Stop button).  
This seems to be connected with the Compress PDF automator action,  
defined in "/Library/PDF Services/Compress PDF.workflow". I opened  
this action in Automator, but having never used Automator so far I  
must admit I feel none the wiser; it seems the action offers a choice  
between Flate and JPEG compression, with JPEG at minimal quality the  
default.

I need to perform more checks, but it seems for the moment that this  
way of reducing the file size is even more efficient than that (if  
any) used by pdfTeX.

Bruno Voisin