Firefox testing - offscreen surfaces and OMTC

[Martin Stransky]

On 08/24/2015 10:41 AM, drago01 wrote:
> On Mon, Aug 24, 2015 at 10:18 AM, Martin Stransky <stransky at redhat.com> wrote:
>> On 08/24/2015 09:43 AM, drago01 wrote:
>>>
>>> On Mon, Aug 24, 2015 at 8:54 AM, Martin Stransky <stransky at redhat.com>
>>> wrote:
>>>>
>>>> On 08/21/2015 08:28 PM, Thomas Daede wrote:
>>>>>
>>>>>
>>>>> I've been running nightly with this enabled for quite a while on Intel
>>>>> and it's been fine.
>>>>>
>>>>> Note that OMTC is required for e10s.
>>>>
>>>>
>>>>
>>>> If you mean OMTC by "this" then you're right - it works fine on nightly
>>>> because nightly is built with in-tree cairo. Fedora it built with system
>>>> cairo which causes crashes with OMTC enabled. First build which supports
>>>> in-tree cairo & Gtk3 is FF41.
>>>
>>>
>>> Why? What's the difference between the in-tree and the system cairo?
>>> Ist it newer? Older? Patched? Or just built with a different
>>> configuration?
>>
>>
>> in-tree cairo is a cairo library intergated in firefox tree, patched for
>> mozilla needs and used for internal rendering. system cairo is a cairo
>> library shipped in Fedora and used by gtk3 to draw.
>
> I know what system and in-tree means .. the question was whether
> mozilla patched the in-tree version or if it is just a different
> version than the system cairo.
> Your comment implies the former.

AFAIK Mozilla cairo is a snapshot from 2010-01-21 + mozilla fixes.
ma.