[cairo] Problems with cairo PDF generation and Mac OS X PDF rendering

[Ralph Giles]

On Fri, Jul 07, 2006 at 10:27:08PM -0400, John Ellson wrote:

> Thanks Malcolm and Dominic for identifying this cairo generator issue,  
> but I'm
> wondering if I have a graphviz issue as well.   Can you suggest what it 
> is that I'm doing
> to get any binary data in the PDF output?

Cairo is compressing the font subset it generates. Since it's a TrueType 
font, this is binary data anyway, so compressing it doesn't make the 
file that much less readable. This is the only non-ASCII segment.

BTW, Ghostscript does complain about the subset font stream in the file 
you attached, so things aren't completely clean. It works around, but
this means cairo isn't spec compliant here (unlike the binary comment 
issue, which is just a convention).

   **** Warning: Encoding not present.
   **** Warning: Font Widths array size is smaller than character range.

Note that in PDF 1.5 it's possible to flate compress all those 
coordinates, which would save quite a bit of space, but at
the expense of a less human-readable file.

FWIW,
 -r