wayland-devel Digest, Vol 34, Issue 44

Juan Zhao juan.j.zhao at linux.intel.com
Mon Jul 22 03:11:54 PDT 2013

Hi pq,

On Mon, 15 Jul 2013 09:14:36 -0700
wayland-devel-request at lists.freedesktop.org wrote:

> On Sat, 13 Jul 2013 11:34:03 +0000
> "Wu, Zhiwen" <zhiwen.wu at intel.com> wrote:
> > Hi pq,
> > I didn't meet you at the IRC today for the time zone issue. So I
> > send this mail. Our team are using subsurface to display the video
> > within application UI. It works fine, but there is a common
> > requirement on the video playback case, that is scaling. We would
> > like to extend subsurface interface to support scaling the buffer
> > on compositor side, instead of client side. What is your opinion
> > about this? 
> Hi,
> I already had a first go on that a while back:
> http://lists.freedesktop.org/archives/wayland-devel/2013-April/008927.html

This sounds interesting. And I just saw the protocol part here, is
there any further implementation for this wl_scaler implementation?


> Notice, how it is not a wl_subsurface addition, but an independent
> extension. This way scaling and cropping can be applied to all
> wl_surfaces, not just sub-surfaces, and it is independent of
> sub-surface support.
> I would strongly suggest to go through that thread and see my and
> Daniel Stone's replies to the comments. There were quite some
> differing opinions on how it should work. It would be nice to hear,
> how my proposal fits your use cases.zjy
> A new, unexplored issue is how it will interact with the hidpi
> support.
> I'm currently on vacation for two more weeks, so I won't be giving
> much input on the matter.
> HTH,
> pq

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