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Date:   Tue, 6 Feb 2018 17:00:13 +0200
From:   Pekka Paalanen <ppaalanen@gmail.com>
To:     Gerd Hoffmann <kraxel@redhat.com>
Cc:     Tomeu Vizoso <tomeu.vizoso@collabora.com>,
        "Michael S. Tsirkin" <mst@redhat.com>,
        David Airlie <airlied@linux.ie>,
        Stefan Hajnoczi <stefanha@gmail.com>,
        Jason Wang <jasowang@redhat.com>, linux-kernel@vger.kernel.org,
        dri-devel@lists.freedesktop.org,
        virtualization@lists.linux-foundation.org, kernel@collabora.com
Subject: Re: [PATCH v3 1/2] drm/virtio: Add window server support
Message-ID: <20180206170013.7e2b08bb@eldfell>
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On Mon, 5 Feb 2018 17:03:22 +0100
Gerd Hoffmann <kraxel@redhat.com> wrote:

> On Mon, Feb 05, 2018 at 03:46:17PM +0100, Tomeu Vizoso wrote:
> > On 02/05/2018 01:20 PM, Gerd Hoffmann wrote: =20
> > >    Hi,
> > >  =20
>=20
> Hmm.  I allways assumed the wayland client allocates the buffers, not
> the server.  Is that wrong?

Hi Gerd,

a fly-by comment here:

The standard operation mode on Wayland indeed is that the client
allocates any pixel buffers. It is not the whole story though.

Server allocated buffers passed to a client also exist:
- core protocol uses this to pass keymaps to clients
- people are not forbidden from writing Wayland extensions that do this
  for whatever reason

The latter server-allocated case could probably be overlooked, but the
keymap case not really. Furthermore, copy&paste and drag&drop protocol
pass pipe file descriptors via Wayland to establish client-to-client
pipes.


Thanks,
pq

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