Stacking subsurface siblings

[Jasper St. Pierre]

Why can't you use the video as the main surface and an OSD as a subsurface?

On Tue, Jun 16, 2015 at 11:09 AM, Arnaud Vrac <rawoul at gmail.com> wrote:
> I'm not sure, but I find it very useful for a video player. The video is
> stacked under the OSD and to be able to use hardware planes, the only viable
> option with wayland is to have a surface for the OSD and a subsurface for
> the video which is stacked under.
>
> On Tue, Jun 16, 2015 at 5:02 PM, Jasper St. Pierre <jstpierre at mecheye.net>
> wrote:
>>
>> I was not aware you could stack subsurfaces under a parent surface at
>> all. Is this intended protocol behavior? The fact that you might be
>> able to do that at all in Weston might be a bug.
>>
>> On Tue, Jun 16, 2015 at 7:46 AM, Arnaud Vrac <rawoul at gmail.com> wrote:
>> > Hi,
>> >
>> > I'm wondering if a behaviour of weston related to subsurfaces is either
>> > a
>> > bug or intended. The protocol description is not clear on what happens
>> > in
>> > the following cases:
>> >
>> > Suppose I have a shell surface (BLUE) and two subsurfaces (RED, GREEN).
>> > I
>> > want to stack them to I get RED, GREEN, BLUE from bottom to top.
>> >
>> > If I do:
>> >
>> > wl_subsurface_place_below(GREEN->subsurface, BLUE->surface);
>> > wl_subsurface_place_below(RED->subsurface, GREEN->surface);
>> >
>> > It works, but if I do:
>> >
>> > wl_subsurface_place_below(RED->subsurface, GREEN->surface);
>> > wl_subsurface_place_below(GREEN->subsurface, BLUE->surface);
>> >
>> > The order is GREEN, RED, BLUE instead.
>> >
>> > Logically the sibling relative order should be kept in the second case,
>> > but
>> > it's not. The protocol is not clear on what should happen, what is the
>> > expected result ?
>> >
>> > I have attached a small sample to test easily.
>> >
>> > --
>> > Arnaud
>> >
>> > _______________________________________________
>> > wayland-devel mailing list
>> > wayland-devel at lists.freedesktop.org
>> > http://lists.freedesktop.org/mailman/listinfo/wayland-devel
>> >
>>
>>
>>
>> --
>>   Jasper
>
>
>
>
> --
> Arnaud Vrac



-- 
  Jasper