[RFC Weston 00/10] Sub-surfaces v2

[Kai-Uwe Behrmann]

Am 07.03.2013 11:44, schrieb Pekka Paalanen:
> On Thu, 07 Mar 2013 07:25:17 +0100
> Kai-Uwe Behrmann <ku.b at gmx.de> wrote:
>>> The biggest improvement over v1 is that we have some thought-out
>>> commit behaviours. It is possible to resize a window so that all
>>> surfaces stay in sync on screen, and it is also possible to have
>>> sub-surfaces running on their own (i.e. without commit the
>>> parent surface, too).
>>
>> What is the default behaviour of repainting in regards to Z-order? Draw
>> all surfaces? I other words, is the possibility to have sub-surfaces
>> running on their own only optional?
>
> Sorry, I don't understand the question.
>
> In v2 proposal, which does not support nesting, all sub-surfaces are
> siblings. They have no effect on each other's rendering. Also, as they
> are all siblings, Z-order is a completely orthogonal attribute to
> commit mode or rendering.
>
> Nesting support is coming, though.
>
> Could you rephrase the question?

I will try.

Statement:
The flattened output of overlapping transparent regions depend on the 
intented order of painting the graph during compositing.

Question:
Does your following annotation has a side effect on the painting(Z) 
order of transparent content?

 >>> and it is also possible to have
 >>> sub-surfaces running on their own (i.e. without commit the
 >>> parent surface, too)

kind regards
Kai-Uwe