<div dir="ltr">It's possible, but the OSD is usually longer lived than the video surfaces, which might be transient. For example in an HTML browser, a declarative UI, etc, multiple video surfaces could be created for some pages and then destroyed when the page is closed. </div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Jun 16, 2015 at 5:11 PM, Jasper St. Pierre <<a href="mailto:jstpierre@mecheye.net" target="_blank">jstpierre@mecheye.net</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Why can't you use the video as the main surface and an OSD as a subsurface? <div class="HOEnZb"><div class="h5"> On Tue, Jun 16, 2015 at 11:09 AM, Arnaud Vrac <<a href="mailto:rawoul@gmail.com">rawoul@gmail.com</a>> 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 <<a href="mailto:jstpierre@mecheye.net">jstpierre@mecheye.net</a>> > 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 <<a href="mailto:rawoul@gmail.com">rawoul@gmail.com</a>> 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 >> > <a href="mailto:wayland-devel@lists.freedesktop.org">wayland-devel@lists.freedesktop.org</a> >> > <a href="http://lists.freedesktop.org/mailman/listinfo/wayland-devel" rel="noreferrer" target="_blank">http://lists.freedesktop.org/mailman/listinfo/wayland-devel</a> >> > >> >> >> >> -- >> Jasper > > > > > -- > Arnaud Vrac </div></div>-- Jasper </blockquote></div> <div> </div>-- <div class="gmail_signature">Arnaud Vrac</div> </div>