[cairo] fixing Cairo's FreeType multi-threaded usage

Jan Slupski jslupski at juljas.net
Fri Mar 2 16:47:49 PST 2007

On Wed, 28 Feb 2007, David Turner wrote:

> Hello,
> here's the first version of my patches to fix Cairo's usage of FreeType with multiple
> threads. It's rather big, so I'll summarize things here a little:

Hi David,

I tried your patches against the current git cairo (latest commit

Is it expected that cairo with these patches runs *much* slower
than without? I'm running simple test case and it seems to be
8+ times slower even in single thread.

Is there anything special I should do (i.e. revert some already
merged patches)?

I'll try to figure out what exactly caused the slowdown, but any hints
are apperciated...

I have used default setup (./autogen.sh; make) and
fontconfig 2.4.2, freetype 2.1.7 & 2.3.1

> - the cairo_ft_ functions do implement the current Cairo behaviour regarding
>  font options (i.e. the FontConfig backend ignores user-provided options for
>  antialiased setting, extracting those from the original FcPattern instead)

It's OT here, but I absolutely agree with you that ignornoring user-provided
options is... strange decision?


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    | |_| |\ |  S L U P S K I             jslupski at juljas.net
  |_| | | | \|                             http://juljas.net/

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