[cairo] cairo release 1.12.10 now available

Behdad Esfahbod behdad at behdad.org
Wed Jan 23 11:01:03 PST 2013

On 13-01-19 12:18 PM, Jan Slupski wrote:
> On 01/16/13 22:04, Chris Wilson wrote:
>> Perhaps the most noteworthy set of the bugfixes
>> was the crusage lead by Behdad Eshfabod to make font handling by
>> pango/cairo/fontconfig fully threadsafe. This testing revealed a couple
>> of races that needed fixing in Cairo's scaled-font and glyph cache.
> Wow, great!
> I see that this document http://www.cairographics.org/roadmap/ wasn't updated
> for quite some time,
> but does it mean that (mentioned there) Behdad fix include
> • David Turner's cairo-ft rewrite <http://david.freetype.org/cairo/>. (behdad)
> patch set (or probably an equivalent one)?

Not really.  The thread-safety part in David's patchset is one workaround for
FreeType's design issues.  The way we do it in PangoCairo is another.  The
base problem is that FT_Face is not threadsafe.  The workaround is to never
use it from multiple threads at the same time.  cairo-ft facilitates this by
having a lock/unlock pair for the FT_Face.  PangoCairo does the same.  If the
user uses the FT_Face by themselves, and creates a cairo_font_face_t for that
FT_Face, and the user code does not use the cairo lock/unlock pair, problems
will happen.  But there really isn't a way to work around that.

That said, I'll revisit David's patchset.


> Thanks,
> Jan


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