[PATCH 0/9] implement multi screen clone mode in drm-backend.so

Zhang, Xiong Y xiong.y.zhang at intel.com
Wed Oct 23 03:46:31 CEST 2013

You mean that we can add a "clone" config option in output section of Weston.ini file.
The "clone" config option decide whether this output is a slave output and which master output   this slave output clone from .
Is my understand correct ?

From: Jason Ekstrand [mailto:jason at jlekstrand.net]
Sent: Sunday, October 13, 2013 10:53 AM
To: Zhang, Xiong Y
Cc: wayland-devel at lists.freedesktop.org
Subject: Re: [PATCH 0/9] implement multi screen clone mode in drm-backend.so

I'm sorry for taking so long to reply; I meant to do so sooner but haven't found the time.  First off, I'm glad to see someone implementing output cloning.  It makes for all sorts of interesting cases that have yet to be tested.  Also, I plan to implement it in the wayland backend at some point in the not-so-distant future.  (Yes, it does make sense to put it in the wayland backend.)

My biggest concern with your current implementation is that you are doing things in terms of a compositor-wide "clone mode" instead of per output "this output is a clone of that one".  I think it is reasonable for a person to want, for instance three outputs A, B, and C where A and B are "masters" and C is a clone of A.  Making it a compositor-wide flag would completely rule out this case.
--Jason Ekstrand

On Tue, Sep 17, 2013 at 10:50 PM, Xiong Zhang <xiong.y.zhang at intel.com<mailto:xiong.y.zhang at intel.com>> wrote:
the theory for clone mode is: all the outputs share the same fb, when primary output
do modeset and pageflip, clone output do this also.
I fulfill repaint, VT switch and hotplug function. I don't implement dynamical setting
output's mdoe.

Xiong Zhang (9):
  add multi-screen-mode option to weston.ini
  find primary output during drm_compositor_create in clone mode
  one pointer exist in only one output
  output gl repaint in clone mode
  deal with VT switch in clone mode
  hot plug add a output in clone mode
  maximize and fullscreen support in clone mode
  hot plug remove a output in clone mode
  improve hotplug remove a output in clone mode

 src/compositor-drm.c | 390 +++++++++++++++++++++++++++++++++++++++++++++++----
 src/compositor.c     |  28 ++++
 src/compositor.h     |   9 ++
 src/input.c          |   7 +-
 src/shell.c          |  10 +-
 src/zoom.c           |   1 +
 weston.ini           |   1 +
 7 files changed, 414 insertions(+), 32 deletions(-)


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